Chemistry · General Science · NDA
MCQ (Single Correct Answer)
1
The symbol of the element 'tungsten' is
NDA 2015 Paper 2
2
Which one of the following statements is correct?
NDA 2015 Paper 2
3
The alkali metals have relatively low melting point. Which one of the following alkali metals is expected to have the highest melting point?
NDA 2015 Paper 2
4
Consider the following reaction,
$$C{H_4}(g) + {H_2}(g)\buildrel {1270\,K} \over \longrightarrow CO(g) + 3{H_2}(g)$$
In the reaction given above, the mixture of CO and H2 is
$$C{H_4}(g) + {H_2}(g)\buildrel {1270\,K} \over \longrightarrow CO(g) + 3{H_2}(g)$$
In the reaction given above, the mixture of CO and H2 is
NDA 2015 Paper 2
5
Addition of gypsum to cement
NDA 2015 Paper 2
6
To weld metals together, high temperature is required. Such a high temperature is obtained by burning
NDA 2015 Paper 2
7
Ammonia (NH3) obtained from different sources always has same proportion of nitrogen and hydrogen. It proves the validity the law of
NDA 2015 Paper 2
8
Boric acid is an acid because its molecule
NDA 2015 Paper 2
9
The main constituent of vinegar is
NDA 2015 Paper 2
10
White phosphorus glows in the dark due to
NDA 2015 Paper 2
11
Which of the following are the properties of an electron?
1. Electron is a constituent of cathode ray.
2. Electron is a negatively charged particle.
3. The mass of the electron is equal to the mass of the proton.
4. Electron is deflected by the electric field but not by magnetic field.
Select the correct answer using the codes given below.
1. Electron is a constituent of cathode ray.
2. Electron is a negatively charged particle.
3. The mass of the electron is equal to the mass of the proton.
4. Electron is deflected by the electric field but not by magnetic field.
Select the correct answer using the codes given below.
NDA 2015 Paper 2
12
Which of the following statements regarding heavy water are correct?
1. It is extensively used as a moderator in nuclear reactors.
2. It cannot be used in exchange reaction to study reaction mechanism.
3. Viscosity of heavy water is relatively smaller than that of ordinary water.
4. The dielectric constant of heavy water is smaller than that of ordinary water.
Select the correct answer using the codes given below.
1. It is extensively used as a moderator in nuclear reactors.
2. It cannot be used in exchange reaction to study reaction mechanism.
3. Viscosity of heavy water is relatively smaller than that of ordinary water.
4. The dielectric constant of heavy water is smaller than that of ordinary water.
Select the correct answer using the codes given below.
NDA 2015 Paper 2
13
Match List I with List II and select the correct answer using the codes given below the Lists.
Image
Image
NDA 2015 Paper 2
14
Graphite is a much better conductor of heat and electricity than diamond. This is due to the fact that each carbon atom in graphite
NDA 2015 Paper 2
15
Match List I with List II and select the correct answer using the codes given below the Lists.
Image
Image
NDA 2016 Paper 2
16
Identify the element having zero valency.
NDA 2016 Paper 2
17
There are six electrons, six protons and six neutrons in an atom of an element. What is the atomic number of the element?
NDA 2016 Paper 2
18
Which one of the following has different number of molecules? (All are kept at normal temperature and pressure)
NDA 2016 Paper 2
19
Which one of the following statements is correct?
NDA 2016 Paper 2
20
When one strikes a safety match, the first step is
NDA 2016 Paper 2
21
The LPG cooking gas contains propane and butane as the constituents. A sulphur containing compound is added to the LPG, because
NDA 2016 Paper 2
22
A plant having yellow leaves with dead spots has the deficiency of
NDA 2016 Paper 2
23
Fluoride toothpaste is sometimes recommended, because fluoride
NDA 2016 Paper 2
24
Combination of one volume of nitrogen with three volumes of hydrogen produces
NDA 2016 Paper 2
25
The setting time of cement is lowered by adding
NDA 2016 Paper 2
26
Emulsion is known as a
NDA 2016 Paper 2
27
If one mixes up ashes with animal fat, the substance received in the crude form is called
NDA 2016 Paper 2
28
Which one of the following gases give acidic solution on dissolving in water?
NDA 2016 Paper 2
29
How many moles of hydrogen atom are present in one mole of aluminium hydroxide?
NDA 2016 Paper 2
30
Which one of the following species is not capable of showing disproportionation reaction?
NDA 2016 Paper 2
31
Which one of the following oxides dissolve in water?
NDA 2016 Paper 1
32
Matter around us can exist in three different states namely, solid, liquid and gas. Correct order of their compressibility is
NDA 2016 Paper 1
33
The temperature at which a solid melts to become a liquid at the atmospheric pressure is called its melting point. The melting point of a solid is an indication of
NDA 2016 Paper 1
34
Which one of the following elements will not react with dilute HCl to produce H2 ?
NDA 2016 Paper 1
35
When a solid is heated, it turns directly into a gas. This process is called
NDA 2016 Paper 1
36
Which one of the following is water gas?
NDA 2016 Paper 1
37
A glass vessel is filled with water up to the brin and a lid is fixed to it tightly. Then it is kept inside a freezer for hours. What is expected to happen?
NDA 2016 Paper 1
38
Suppose you have four test tubes labelled A, B, C and D. A contains water, B contains solution of an alkali, C contains solution of an acid, and D contains solution of sodium chloride. Which one of these solutions will turn phenolphthalein solution pink?
NDA 2016 Paper 1
39
An tom of carbon has 6 protons. Its mass number is 12. How many neutrons are present in an atom of carbon?
NDA 2016 Paper 1
40
Which one of the following following is a reduction reaction?
NDA 2016 Paper 1
41
Which one of the following oxides of nitrogen is known as 'anhydride' of nitric acid?
NDA 2016 Paper 1
42
Which one of the following is the chemical name for baking soda?
NDA 2016 Paper 1
43
Statements
I. Petroleum is a mixture of many different hydrocarbons of different densities.
II. The grade of petroleum depends mainly on the relative proportion of the different hydrocarbons.
I. Petroleum is a mixture of many different hydrocarbons of different densities.
II. The grade of petroleum depends mainly on the relative proportion of the different hydrocarbons.
NDA 2016 Paper 1
44
Density of water is
NDA 2016 Paper 1
45
The phosphorus used in the manufacture of safety matches is
NDA 2016 Paper 1
46
Which one of the following is not a chemical change?
NDA 2016 Paper 1
47
Soap is the sodium or potassium salt of
NDA 2016 Paper 1
48
Which of the following carbon compounds will not give a sooty flame?
NDA 2016 Paper 1
49
What is the number of mole(s) of H2(g) required to saturate one mole of benzene?
NDA 2016 Paper 1
50
Which one of the following is a cause of acid rains?
NDA 2017 Paper 2
51
The desirable range of pH for drinking water is
NDA 2017 Paper 2
52
Consider the following reaction, CH4 + 2O2 $$\to$$ CO2 + 2H2O. Which of the following about the reaction given above is/are correct?
1. Carbon is oxidised
2. Hydrogen is oxidised
3. Hydrogen is reduced
4. Carbon is reduced
Select the correct answer using the code given below :
1. Carbon is oxidised
2. Hydrogen is oxidised
3. Hydrogen is reduced
4. Carbon is reduced
Select the correct answer using the code given below :
NDA 2017 Paper 2
53
Water boils at a lower temperature at high altitudes, because
NDA 2017 Paper 2
54
How much CO2 is produced on heating of 1 kg of carbon?
NDA 2017 Paper 2
55
Zinc is used to protect iron from corrosion because zinc is
NDA 2017 Paper 2
56
Which one of the following gases is placed second in respect of abundance in the Earth's atmosphere?
NDA 2017 Paper 2
57
Which one of the following is a chemical change?
NDA 2017 Paper 2
58
Which one among the following chemicals is used as washing soda?
NDA 2017 Paper 2
59
Why is potassium permanganate used for purifying drinking water?
NDA 2017 Paper 2
60
The principal use of hydrofluoric acid is
NDA 2017 Paper 2
61
The species that has the same number of electrons as, $$_{17}^{35}$$Cl is
NDA 2017 Paper 2
62
The compound C6H12O4 contains
NDA 2017 Paper 2
63
The ionisation energy of hydrogen atom in the ground state is
NDA 2017 Paper 2
64
When pure water boils vigorously, the bubbles that rise to the surface are composed primarily of
NDA 2017 Paper 2
65
Which compound, when dissolved in water, conducts electricity and forms a basic solution?
NDA 2017 Paper 2
66
Molecules of which of the following has cage like structure?
1. Diamond, 2. Graphite, 3. Fullerenes
Select the correct answer using the code given below.
1. Diamond, 2. Graphite, 3. Fullerenes
Select the correct answer using the code given below.
NDA 2017 Paper 1
67
Temporary hardness in water is due to which one of the following of calcium and magnesium?
NDA 2017 Paper 1
68
Which one of the following elements is least reactive with water?
NDA 2017 Paper 1
69
Rutherford's alpha-particle scattering experiment was responsible for the discovery of
NDA 2017 Paper 1
70
Glass is a
NDA 2017 Paper 1
71
Which one of the following statements is not correct?
NDA 2017 Paper 1
72
The amount of heat required to change a liquid to gaseous state without any change in temperature is known as
NDA 2017 Paper 1
73
A homogeneous mixture contains two liquids. How are they separated?
NDA 2017 Paper 1
74
Which one of the following elements forms highest number of compounds?
NDA 2017 Paper 1
75
Which one of the following elements corrodes rapidly?
NDA 2017 Paper 1
76
20 g of common salt is dissolved in 180g of water. What is the mass percentage of the salt in the solution?
NDA 2017 Paper 1
77
The valency of an element depends upon the
NDA 2017 Paper 1
78
Match List I with List II and select the correct answer using the code given below the Lists.
Image
Image
NDA 2017 Paper 1
79
Why is it difficult to measure the coefficient of expansion of a liquid than solid?
NDA 2017 Paper 1
80
Radon is
NDA 2017 Paper 1
81
Which one of the following elements is used in pencil-lead?
NDA 2017 Paper 1
82
The atomic number of an element is 8. How many electrons will it gain to form a compound with sodium?
NDA 2018 Paper 2
83
A sample of oxygen contains two isotopes of oxygen with masses 16u and 18u respectively. The proportion of these isotopes in the sample is 3 : 1. What will be the average atomic mass of oxygen in this sample?
NDA 2018 Paper 2
84
Which one of the following is a heterogeneous mixture?
NDA 2018 Paper 2
85
What is the formula mass of anhydrous sodium carbonate? (Given, that the atomic masses of sodium, carbon and oxygen are 23u, 12u and 16u respectively).
NDA 2018 Paper 2
86
Which one of the following is called 'syn gas' ?
NDA 2018 Paper 2
87
Which one of the following reactions will give NO (nitric oxide) gas as one of the products ?
NDA 2018 Paper 2
88
Which one of the following is a tribasic acid?
NDA 2018 Paper 2
89
Which one of the following statements is not correct?
NDA 2018 Paper 2
90
Which one of the following solution will have pH less than 7 ?
NDA 2018 Paper 2
91
Which one of the following is an oxidation-reduction reaction ?
NDA 2018 Paper 2
92
Which one of the following is not used as fertilizer?
NDA 2018 Paper 2
93
Which one of the following is the chemical formula of gypsum?
NDA 2018 Paper 2
94
Which one of the following statements about the law of conservation of mass is correct?
NDA 2018 Paper 2
95
Which of the following properties is true for a tooth paste?
NDA 2018 Paper 1
96
Which one of the following gives the highest amount of hydrogen ions (H+) ?
NDA 2018 Paper 1
97
Brine is an aqueous solution of
NDA 2018 Paper 1
98
Which one of the following is the chemical formula of washing soda?
NDA 2018 Paper 1
99
Which one of the following is not true for bleaching powder?
NDA 2018 Paper 1
100
Which one of the following is the number of water molecules that share with two formula unit of CaSO4 in plaster of Paris?
NDA 2018 Paper 1
101
How is carbon black obtained?
NDA 2018 Paper 1
102
Which one of the following properties is not true for graphite?
NDA 2018 Paper 1
103
Which one of the following is the purest form of carbon?
NDA 2018 Paper 1
104
The poisonous nature of carbon monoxide (CO) is due to its
NDA 2018 Paper 1
105
Which one of the following alkali metals has lowest melting point?
NDA 2018 Paper 1
106
Which one of the following metals is alloyed with sodium to transfer heat in a nuclear reactor?
NDA 2018 Paper 1
107
Let there be an object having some chemicals in it. It starts moving with a uniform velocity v and a chemical reaction starts happening. In this case, which of the following statement(s) is/are correct?
1. Chemical reactions happening in the system cannot change the velocity (v) of the centre of mass of the object.
2. Chemical reactions happening in the system cannot change kinetic energy of the particles inside with respect to the centre of mass of object.
Select the correct answer using the code given below :
1. Chemical reactions happening in the system cannot change the velocity (v) of the centre of mass of the object.
2. Chemical reactions happening in the system cannot change kinetic energy of the particles inside with respect to the centre of mass of object.
Select the correct answer using the code given below :
NDA 2019 Paper 2
108
Which one of the following compounds does not exhibit a different oxidation number of the same element?
NDA 2019 Paper 2
109
Which one of the following statements about glass is not correct?
NDA 2019 Paper 2
110
Which one of the following statements is correct?
NDA 2019 Paper 2
111
Which one of the following statements about diamond and graphite is not correct?
NDA 2019 Paper 2
112
The raw materials used for the manufacture of Portland cement are
NDA 2019 Paper 2
113
Which one of the following statements about water is not true?
NDA 2019 Paper 2
114
A sample of 'soft soap' contains
NDA 2019 Paper 2
115
Which one of the following does not represent the salt, calcium carbonate?
NDA 2019 Paper 2
116
Which one of the following substances is not a mixture?
NDA 2019 Paper 2
117
Which one of the following is termed as 'dry ice'?
NDA 2019 Paper 2
118
Net movement of water from a dilute to a concentrated solution through a selectively permeable membrane is called
NDA 2019 Paper 2
119
Which one of the following statements regarding cathode rays is not correct?
NDA 2019 Paper 2
120
A very large volume of hydrogen can be accommodated by making
NDA 2019 Paper 2
121
Which one of the following is not a monoatomic element?
NDA 2019 Paper 2
122
Which one of the following represents is the correct order of electron releasing tendency of metals?
NDA 2019 Paper 2
123
Which one of the following energy is stored in the links between the atoms?
NDA 2019 Paper 1
124
Which one of the following minerals is used as a fuel in nuclear power stations?
NDA 2019 Paper 1
125
Which one of the following is not a synthetic detergent?
NDA 2019 Paper 1
126
Which one of the following is an example of a clean fuel?
NDA 2019 Paper 1
127
Which one of the following metals does not react with cold water?
NDA 2019 Paper 1
128
In which of the following pairs are the isoelectronic ions?
NDA 2019 Paper 1
129
Which one of the following is used as a binder in paints?
NDA 2019 Paper 1
130
Basic scientific principle behind a nuclear reactor is
NDA 2019 Paper 1
131
Which one of the following could be the melting point of iron?
NDA 2019 Paper 1
132
Which one of the following statements is not correct for the given reaction?
Fe(s) + CuSO4 (aq) $$\to$$ FeSO4 (aq) + Cu (s)
Fe(s) + CuSO4 (aq) $$\to$$ FeSO4 (aq) + Cu (s)
NDA 2019 Paper 1
133
Which one of the following is an organic acid?
NDA 2019 Paper 1
134
Dinitrogen (N2) and dioxygen (O2) are the main constituents of air, but they do not react with each other to form oxides of nitrogen because,
NDA 2019 Paper 1
135
The equivalent weight of oxalic acid in C2H2O4 . 2H2O is
NDA 2019 Paper 1
136
On exposure to moist air, copper gains a green oat on its surface due to formation of which one of the following compounds?
NDA 2019 Paper 1
137
Which one of the following will not produce carbon dioxide on reacting with an aqueous solution of hydrochloric acid?
NDA 2019 Paper 1
138
Which one of the following substances is not a mixture?
NDA 2019 Paper 1
139
Tooth enamel is made up of which one of the following calcium compounds?
NDA 2019 Paper 1
140
The relative atomic mass of boron (which exists in two isotopic forms 10B and 11B) is 10.81. What will be the abundance of 10B and 11B, respectively (consider a sample of 100 atoms)?
NDA General Ability 21 April 2024
141
Which among the following are essential constituents of Portland cement?
NDA General Ability 21 April 2024
142
Litmus, a well-known acid-base indicator, is derived from :
NDA General Ability 21 April 2024
143
What is the oxidation state of Vanadium in $V_2O_5$?
NDA General Ability 21 April 2024
144
Match List-I with List-II and select the correct answer using the code given below the Lists:
| List-I (Allotrope of Carbon) |
List-II (Property) |
|---|---|
| A. Graphite | 1. Thinnest and strongest material |
| B. Diamond | 2. Hardest natural substance |
| C. Fullerene | 3. Very light and strong material |
| D. Graphene | 4. Soft and slippery material |
NDA General Ability 21 April 2024
145
Water gas is a mixture of:
NDA General Ability 21 April 2024
146
Which one among the following statements with reference to the properties of water is not correct?
NDA General Ability 21 April 2024
147
Which one among the following compounds has a sweet and fruity smell?
NDA General Ability 21 April 2024
148
What is the coordination number of Na⁺ and Cl⁻ ions in NaCl lattice?
NDA General Ability 21 April 2024
149
Which one among the following is present in the nettle leaf hairs that causes burning pain?
NDA General Ability 21 April 2024
150
Which one among the following is known as Milk of Magnesia?
NDA General Ability 21 April 2024
151
Soap with water forms :
NDA General Ability 21 April 2024
152
Which among the following is the correct composition of Borax?
NDA General Ability 21 April 2024
153
Which one among the following oxides has the highest melting point?
NDA General Ability 21 April 2024
154
Galvanization is a method of protecting iron from rusting by coating with a thin layer of
NDA General Ability 3 September 2023
155
Which one of the following alloys contains a non-metal as one of its constituent?
NDA General Ability 3 September 2023
156
Buckminster fullerene, which looks like a football, is an allotropic form of
NDA General Ability 3 September 2023
157
Consider the following reaction:
Fe2O3(s) + 2Al(s) → 2Fe(s) + Al2O3(s)
Which of the following statements about the given reaction is NOT correct?
NDA General Ability 3 September 2023
158
Match List I with List II and select the correct answer using the code given below the Lists:
|
LIST I (Chemical process) |
LIST II (Reaction) |
||
|
A. |
Electrolysis of water |
1. |
Double displacement |
|
B. |
Burning of coal |
2. |
Combination reaction |
|
C. |
Iron nail immersed in copper sulphate solution |
3. |
Decomposition reaction |
|
D. |
Addition of barium chloride solution to aluminium sulphate solution |
4. |
Displacement reaction |
NDA General Ability 3 September 2023
159
Which one of the following processes involves chemical reaction?
NDA General Ability 3 September 2023
160
Which one of the following metals does NOT react with cold water to liberate hydrogen gas?
NDA General Ability 3 September 2023
161
Consider the following reaction:
2HgO $ \stackrel{\Delta}{\longrightarrow} $ 2Hg + O2
The respective state of HgO, Hg and O2 in the above reaction is
NDA General Ability 3 September 2023
162
A liquid is heated up to a certain temperature. Which one of the following situation would correspond to the boiling of the liquid?
NDA General Ability 3 September 2023
163
Which one of the following is NOT an example of organic compound?
NDA General Ability 3 September 2023
164
Which one of the following acid is used by goldsmith for cleaning of gold and silver articles?
NDA General Ability 3 September 2023
165
What is the action of litmus on ethanol?
NDA General Ability 3 September 2023
166
Which one of the following metal is NOT an essential component in stainless steel?
NDA General Ability 3 September 2023
167
Match List I with List II and select the correct answer using the code given below the Lists:
|
LIST I (Process) |
LIST II (Separation method) |
||
|
A. |
Separation of acetone and water from their mixture |
1. |
Chromatography |
|
B. |
Separation of water |
2. |
Centrifugation |
|
C. |
Separation of cream from milk |
3. |
Distillation |
|
D. |
Separation of pigments from plant extract |
4. |
Separating Funnel |
NDA General Ability 3 September 2023
168
Which one of the following metals can be extracted using carbon as reducing agent?
NDA General Ability 3 September 2023
169
Which among the following is NOT true with respect to colloidal solution?
NDA General Ability 3 September 2023
170
Kerosene and petrol mixture can be best separated by
NDA General Ability 3 September 2023
171
As proposed by Dalton, which of the following symbol represents phosphorus?
NDA General Ability 3 September 2023
172
Which among the following statements with respect to carbon is/are correct?
1. Carbon forms the basis for all living organisms and many things we use
2. Carbon shows tetra-valency and the property of catenation
3. Carbon forms covalent bonds with itself and other elements
4. Carbon forms compounds containing triple and tetra bonds between carbon atoms
Select the correct answer using the code given below:
NDA General Ability 3 September 2023
173
Who among the following is not a recipient of Nobel Prize in Chemistry in 2022?
NDA General Ability 16 April 2023
174
Which of the hydrocarbons are arranged as per the increasing order of their boiling points?
NDA General Ability 16 April 2023
175
Which one of the following apparatus is used for separating benzene and water mixture?
NDA General Ability 16 April 2023
176
An iron nail dipped in copper sulphate solution turns brown. This is due to which one of the following types of reactions?
NDA General Ability 16 April 2023
177
Toothpaste prevents tooth decay by:
NDA General Ability 16 April 2023
178
Which one of the following statements about X-rays is not true?
NDA General Ability 16 April 2023
179
Mica is mainly used in:
NDA General Ability 16 April 2023
180
What is the specific purpose of using potassium hydroxide during the saponification process?
NDA General Ability 16 April 2023
181
Which one of the following is the correct arrangement of metals in the decreasing order of their reactivity?
NDA General Ability 16 April 2023
182
Which among the following statements is not correct with respect to allotropes of Carbon?
NDA General Ability 16 April 2023
183
Which among the following is the popular method for manufacture of ammonia?
NDA General Ability 16 April 2023
184
For manufacturing of glass, which among the following is used as a source of silica?
NDA General Ability 16 April 2023
185
Which among the following is the correct arrangement of halogens in the increasing order of their oxidizing nature?
NDA General Ability 16 April 2023
186
Copper sulphate crystals available in the market are blue coloured crystals. By careful heating, they turn to white colour. Which one of the following is responsible for the blue colour?
NDA General Ability 16 April 2023
187
Equal volume of all gases, when measured at the same temperature and pressure, contain an equal number of particles. Who proposed the above law?
NDA General Ability 16 April 2023
188
Airbags work on the principle of a chemical reaction triggered by the impact producing a gaseous product that causes a sudden volume change. Which one among the following chemical conversions is responsible for this?
NDA General Ability 16 April 2023
189
Which one of the following is the correct reactivity series with water?
NDA General Ability 4 September 2022
190
Which one of the following metals floats in cold water?
NDA General Ability 4 September 2022
191
Which one of the following solutions is not capable of conducting electricity?
NDA General Ability 4 September 2022
192
Which of the following compounds undergoes/undergo thermal decomposition?
NDA General Ability 4 September 2022
193
Silver artifacts get tarnished in the air due to the formation of
NDA General Ability 4 September 2022
194
Bronze is an alloy of
NDA General Ability 4 September 2022
195
Which one of the following salts does not possess water of crystallization?
NDA General Ability 4 September 2022
196
Bee sting leaves an acid which causes pain and irritation. The acid released is
NDA General Ability 4 September 2022
197
Liquid vegetable oils are converted to solid margarine by the use of
NDA General Ability 4 September 2022
198
The number of structural isomers of pentane is
NDA General Ability 4 September 2022
199
Vapours of sulphur escaping from a volcano often form a crust on the rocks. The process involved is an example of
NDA General Ability 4 September 2022
200
Dry ice is used on a performing stage to produce mist in air. The process involved is an example of
NDA General Ability 4 September 2022
201
C4H8 belongs to the homologous series of
NDA General Ability 4 September 2022
202
For an element with atomic number 35, which one of the following will be the correct number of electrons in its valence shell based on Bohr's model of an atom?
NDA General Ability 10 April 2022
203
Which one of the following is not an example of a redox reaction?
NDA General Ability 10 April 2022
204
Which one of the following allotropes of carbon is isomorphous with crystalline silicon?
NDA General Ability 10 April 2022
205
Which one of the following is the colour of hydrogen gas?
NDA General Ability 10 April 2022
206
Which one of the following is not a pigment?
NDA General Ability 10 April 2022
207
Which one of the following statements about fertilizers is not correct?
NDA General Ability 10 April 2022
208
Which one of the following statements is not correct?
NDA General Ability 10 April 2022
209
Which one of the following is not a solution?
NDA General Ability 10 April 2022
210
Refining of petroleum is carried out using which one of the following techniques?
NDA General Ability 10 April 2022
211
Which one of the following is a chemical change?
NDA General Ability 10 April 2022
212
Which one of the following is the correct molecular formula of ammonium carbonate if the valency of ammonium ion is (+1) and carbonate anion is (-2)?
NDA General Ability 10 April 2022
213
Which one of the following is a covalent compound?
NDA General Ability 10 April 2022
214
The mass number of argon is 40. Which one of the following statements is correct?
NDA General Ability 10 April 2022
215
Which one of the following is the correct order of the valencies of elements Ne, Si, N and Mg?
NDA General Ability 10 April 2022
216
Which one of the following reactions is an example of decomposition reaction?
NDA General Ability 10 April 2022
217
Common salt (NaCl) is not used as a raw material for preparation of which one of the following compounds?
NDA General Ability 18 April 2021
218
LED (a semi-conductor device) is an abbreviation that stands for
NDA General Ability 18 April 2021
219
Which one of the following is the chemical formula of Hypobromous acid?
NDA General Ability 18 April 2021
220
Which one of the following is not used as a raw material in the manufacture of glass?
NDA General Ability 18 April 2021
221
In electrolytic refining of copper, the electrolyte is a solution of
NDA General Ability 18 April 2021
222
Solder is an alloy of
NDA General Ability 18 April 2021
223
Which one of the following statements about dihydrogen (H2) is not correct?
NDA General Ability 18 April 2021
224
Which of the following sets of elements has the same valency?
NDA General Ability 18 April 2021
225
The process whereby certain minerals absorb water, expand and change is called as
NDA General Ability 18 April 2021
226
Which one of the following statements about the cleansing action of soap is not true?
NDA General Ability 18 April 2021
227
Hydrogenation of vegetable oils using nickel catalyst is an example of
NDA General Ability 18 April 2021
228
Which one of the following materials is not an allotrope of carbon ?
NDA General Ability 18 April 2021
229
Which one of the following reactions does not result in the evolution of hydrogen gas?
NDA General Ability 18 April 2021
230
Which one of the following acids is predominantly found in tomatoes?
NDA General Ability 18 April 2021
231
Reaction of quick lime (CaO) with water to produce slaked lime (Ca(OH)2) is an example of
NDA General Ability 18 April 2021