Chemistry · General Science · NDA

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 (...

Which among the following are essential constituents of Portland cement?

Litmus, a well-known acid-base indicator, is derived from :

What is the oxidation state of Vanadium in $V_2O_5$?

Match List-I with List-II and select the correct answer using the code given below the Lists: table { width: 100%; ...

Water gas is a mixture of:

Which one among the following statements with reference to the properties of water is not correct?

Which one among the following compounds has a sweet and fruity smell?

What is the coordination number of Na⁺ and Cl⁻ ions in NaCl lattice?

Which one among the following is present in the nettle leaf hairs that causes burning pain?

Which one among the following is known as Milk of Magnesia?

Soap with water forms :

Which among the following is the correct composition of Borax?

Which one among the following oxides has the highest melting point?

Galvanization is a method of protecting iron from rusting by coating with a thin layer of

Which one of the following alloys contains a non-metal as one of its constituent?

Buckminster fullerene, which looks like a football, is an allotropic form of

Consider the following reaction: Fe2O3(s) + 2Al(s) → 2Fe(s) + Al2O3(s) Which of the following statements about the given reaction is NOT correct? ...

Match List I with List II and select the correct answer using the code given below the Lists: LIST I (Chemical process) L...

Which one of the following processes involves chemical reaction?

Which one of the following metals does NOT react with cold water to liberate hydrogen gas?

Consider the following reaction: 2HgO $ \stackrel{\Delta}{\longrightarrow} $ 2Hg + O2 The respective state of HgO, Hg and O2 in the above react...

A liquid is heated up to a certain temperature. Which one of the following situation would correspond to the boiling of the liquid?

Which one of the following is NOT an example of organic compound?

Which one of the following acid is used by goldsmith for cleaning of gold and silver articles?

What is the action of litmus on ethanol?

Which one of the following metal is NOT an essential component in stainless steel?

Match List I with List II and select the correct answer using the code given below the Lists: LIST I (Process) LIST II ...

Which one of the following metals can be extracted using carbon as reducing agent?

Which among the following is NOT true with respect to colloidal solution?

Kerosene and petrol mixture can be best separated by

As proposed by Dalton, which of the following symbol represents phosphorus?

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...

Who among the following is not a recipient of Nobel Prize in Chemistry in 2022?

Which of the hydrocarbons are arranged as per the increasing order of their boiling points?

Which one of the following apparatus is used for separating benzene and water mixture?

An iron nail dipped in copper sulphate solution turns brown. This is due to which one of the following types of reactions?

Toothpaste prevents tooth decay by:

Which one of the following statements about X-rays is not true?

Mica is mainly used in:

What is the specific purpose of using potassium hydroxide during the saponification process?

Which one of the following is the correct arrangement of metals in the decreasing order of their reactivity?

Which among the following statements is not correct with respect to allotropes of Carbon?

Which among the following is the popular method for manufacture of ammonia?

For manufacturing of glass, which among the following is used as a source of silica?

Which among the following is the correct arrangement of halogens in the increasing order of their oxidizing nature?

Copper sulphate crystals available in the market are blue coloured crystals. By careful heating, they turn to white colour. Which one of the following...

Equal volume of all gases, when measured at the same temperature and pressure, contain an equal number of particles. Who proposed the above law?

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...

Which one of the following is the correct reactivity series with water?

Which one of the following metals floats in cold water?

Which one of the following solutions is not capable of conducting electricity?

Which of the following compounds undergoes/undergo thermal decomposition?

Silver artifacts get tarnished in the air due to the formation of

Bronze is an alloy of

Which one of the following salts does not possess water of crystallization?

Bee sting leaves an acid which causes pain and irritation. The acid released is

Liquid vegetable oils are converted to solid margarine by the use of

The number of structural isomers of pentane is 

Vapours of sulphur escaping from a volcano often form a crust on the rocks. The process involved is an example of

Dry ice is used on a performing stage to produce mist in air. The process involved is an example of

C4H8 belongs to the homologous series of

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...

Which one of the following is not an example of a redox reaction?

Which one of the following allotropes of carbon is isomorphous with crystalline silicon?

Which one of the following is the colour of hydrogen gas?

Which one of the following is not a pigment?

Which one of the following statements about fertilizers is not correct?

Which one of the following statements is not correct?

Which one of the following is not a solution?

Refining of petroleum is carried out using which one of the following techniques?

Which one of the following is a chemical change?

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)?

Which one of the following is a covalent compound?

The mass number of argon is 40. Which one of the following statements is correct?

Which one of the following is the correct order of the valencies of elements Ne, Si, N and Mg?

Which one of the following reactions is an example of decomposition reaction?