Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R : Assertion (A) : $\mathrm{BeCl}_{2}$ and $\mat...

Better method for preparation of $$\mathrm{BeF}_{2}$$, among the following is :

Identify the correct order of standard enthalpy of formation of sodium halides :

$$\mathrm{Be}(\mathrm{OH})_{2}$$ reacts with $$\mathrm{Sr}(\mathrm{OH})_{2}$$ to yield an ionic salt. Choose the incorrect option related to this reac...

The density of alkali metals is in the order :

In the given reaction cycle X, Y and Z respectively are :...

Alkali metal from the following with least melting point is :

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The correct order of metallic character is :

Number of water molecules in washing soda and soda ash respectively are :

Lime reacts exothermally with water to give 'A' which has low solubility in water. Aqueous solution of 'A' is often used for the test of CO$$_2$$, a t...

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R. Assertion A : Sodium is about 30 times as abunda...

For a good quality cement, the ratio of lime to the total of the oxides of $$\mathrm{Si}, \mathrm{Al}$$ and $\mathrm{Fe}$ should be as close as to :...

Given below are two statements: Statement I : Lithium and Magnesium do not form superoxide Statement II : The ionic radius of $$\mathrm{Li}^{+}$$ is l...

What is the purpose of adding gypsum to cement?

The product, which is not obtained during the electrolysis of brine solution is :

Ion having highest hydration enthalpy among the given alkaline earth metal ions is :

Structures of $$\mathrm{BeCl}_{2}$$ in solid state, vapour phase and at very high temperature respectively are :

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Gypsum is used for making f...

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Choose the correct statement(s) : A. Beryllium oxide is purely acidic in nature. B. Beryllium carbonate is kept in the atmosphere of $$\mathrm{CO_2}$$...

The element playing significant role in neuromuscular function and interneuronal transmission is :

Chlorides of which metal are soluble in organic solvents :

Which of the following reaction is correct?

Lithium aluminium hydride can be prepared from the reaction of :

The alkaline earth metal sulphate(s) which are readily soluble in water is/are : A. $$\mathrm{BeSO}_{4}$$ B. $$\mathrm{MgSO}_{4}$$ C. $$\mathrm{CaSO}_...

The correct order of hydration enthalpies is (A) K$$^+$$ (B) Rb$$^+$$ (C) Mg$$^{2+}$$ (D) Cs$$^+$$ (E) Ca$$^{2+}$$ Choose the correct answer from the ...

Which one among the following metals is the weakest reducing agent?

Which of the following represents the correct order of metallic character of the given elements?

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R Assertion A : The alkali metals and their salts i...

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R Assertion A : Beryllium has less negative value o...

Identify the correct statements about alkali metals. A. The order of standard reduction potential (M$$^+$$ | M) for alkali metal ions is Na > Rb > L...

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Reaction of BeO with ammonia and hydrogen fluoride gives A which on thermal decomposition gives $$\mathrm{BeF_2}$$ and $$\mathrm{NH_4F}$$. What is 'A'...

Portland cement contains 'X' to enhance the setting time. What is 'X'?

Lithium nitrate and sodium nitrate, when heated separately, respectively, give :

The correct decreasing order for metallic character is :

Statement I : An alloy of lithium and magnesium is used to make aircraft plates. Statement II : The magnesium ions are important for cell-membrane int...

Which of the following statement is incorrect?

An element A of group 1 shows similarity to an element B belonging to group 2. If A has maximum hydration enthalpy in group 1 then B is :

The metal that has very low melting point and its periodic position is closer to a metalloid is :

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: $$\mathrm{LiF}$$ is sparingly solub...

Reaction of $$\mathrm{BeCl}_{2}$$ with $$\mathrm{LiAlH}_{4}$$ gives : (A) $$\mathrm{AlCl}_{3}$$ (B) $$\mathrm{BeH}_{2}$$ (C) $$\mathrm{LiH}$$ (D) $$\m...

The correct order of density is :

Choose the correct order of density of the alkali metals :

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Correct statement about alkali metal oxides is :

Amongst baking soda, caustic soda and washing soda, carbonate anion is present in :

Arrange the following in the decreasing order of their covalent character : (A) LiCl (B) NaCl (C) KCl (D) CsCl Choose the most appropriate answer from...

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Addition of H2SO4 to BaO2 produces :

BeCl2 reacts with LiAlH4 to give :

s-block element which cannot be qualitatively confirmed by the flame test is :

The correct order of melting point is :

Which one of the following alkaline earth metal ions has the highest ionic mobility in its aqueous solution?

In the industrial production of which of the following, molecular hydrogen is obtained as a byproduct?

Which one of the following compounds is used as a chemical in certain type of fire extinguishers?

Which of the following statements are correct? (A) Both LiCl and MgCl2 are soluble in ethanol. (B) The oxides Li2O and MgO combine with excess of oxyg...

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Lithium salts are hydrated....

The major component/ingredient of Portland Cement is :

The number of water molecules in gypsum, dead burnt plaster and plaster of Paris, respectively are :

What are the products formed in sequence when excess of CO2 is passed in slaked lime?

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Given below are two statements : One is labelled as Assertion A and the other labelled as Reason R.Assertion A : Lithium halides are some what covalen...

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Given below are two statements :Statement I : None of the alkaline earth metal hydroxides dissolve in alkali.Statement II : Solubility of alkaline ear...

Match List-I with List-II List-I(Elements) List-II(Properties) (a) Ba (i) Organic solvent soluble compou...

The set in which compounds have different nature is :

A s-block element (M) reacts with oxygen to form an oxide of the formula MO2. The oxide is pale yellow in colour and paramagnetic. The element (M) is ...

Match List - I with List - II : List - I List - II (a) Be (i) treatment of cancer (b) Mg ...

Match List - I with List - II List - I List - II (a) $$Ca{(OCl)_2}$$ (i) Antacid (b) $$CaS...

The set of elements that differ in mutual relationship from those of the other sets is :

One of the by-products formed during the recovery of NH3 from Solvay process is :

The correct order of conductivity of ions in water is :

Given below are two statements :Statement I : Both CaCl2 . 6H2O and MgCl2 . 8H2O undergo dehydration on heating.Statement II : BeO is amphoteric where...

Match List - I with List - II. List I (Salt) List II (Flame colour wavelength) (a) LiCl (i) 455.5 nm ...

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Among the sulphates of alkaline earth metals, the solubilities of BeSO4 and MgSO4 in water, respectively, are :

An alkaline earth metal ‘M’ readily forms water soluble sulphate and water insoluble hydroxide. Its oxide MO is very stable to heat and does not have ...

On combustion of Li, Na and K in excess of air, the major oxides formed, respectively, are :

Two elements A and B have similar chemical properties. They don’t form solid hydrogencarbonates, but react with nitrogen to form nitrides. A and B, re...

The metal mainly used in devising photoelectric cells is :

Among the statements (a)-(d) the correct ones are : (a) Lithium has the highest hydration enthalpy among the alkali metals. (b) Lithium chloride is in...

When gypsum is heated to 393 K, it forms :

The INCORRECT statement is :

The correct sequence of thermal stability of the following carbonates is :

A hydrated solid X on heating initially gives a monohydrated compound Y. Y upon heating above 373 K leads to an anhydrous white powder Z. X and Z, re...

The alloy used in the construction of aircrafts is :

The structures of beryllium chloride in the solid state and vapour, phase, respectively,are :

Magnisium powder burns in air to give :

The correct order of hydration enthapies of alkali metal ions is :

A metal on combustion in excess air forms X. X upon hydrolysis with water yields H2O2 and O2 along with another product. The metal is :...

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The reaction that does NOT define calcination is :

The amphoteric hydroxide is :

Sodium metal on dissolution in liquid ammonia gives a deep blue solution due to the formation of :

The metal used for marking X–ray tube window is :

The metal that forms nitride by reacting directly with N2 of air, is :

The alkaline earth metal nitrate that does not crystallise with water molecules, is :

Both lithium and magnesium display several similar properties due to the diagonal relationship; however, the one which is incorrect, is :

The commercial name for calcium oxide is :

The correct order of the solubility of alkaline-earth metal sulphates in water is :

Which of the following atoms has the highest first ionization energy?

The main oxides formed on combustion of Li, Na and K in excess of air are, respectively :

The hottest region of Bunsen flame shown in the figure below is : ...

Which one of the following alkaline earth metal sulphates has its hydration enthalpy greater than its lattice enthalpy?

The metal that cannot be obtained by electrolysis of an aqueous solution of its salts is :

Which of the following on thermal decomposition yields a basic as well as an acidic oxide?

The ionic mobility of alkali metal ions in aqueous solution is maximum for :

Based on lattice energy and other considerations which one of the following alkali metal chlorides is expected to have the highest melting point :

One mole of magnesium nitride on the reaction with an excess of water gives :

In curing cement plasters water is sprinkled from time to time. This helps in :

The solubilities of carbonates decrease down the magnesium group due to a decrease in :

The substance not likely to contain CaCO3 is :

KO2 (potassium super oxide) is used in oxygen cylinders in space and submarines because it :

The metallic sodium disolves in liquid ammonia to form a deep blue coloured solution. The deep blue colour is due to formation of :

A metal M readily forms its sulphate MSO4, which is water-soluble. It forms its oxide MO which becomes inert on heating. It forms an insoluble hydroxi...

$$\mathrm{Mg}\left(\mathrm{NO}_{3}\right)_{2} \cdot \mathrm{XH}_{2} \mathrm{O}$$ and $$\mathrm{Ba}\left(\mathrm{NO}_{3}\right)_{2} \cdot \mathrm{YH}_{...

The number of alkali metal(s), from $\mathrm{Li}, \mathrm{K}, \mathrm{Cs}$, Rb having ionization enthalpy greater than $400 \mathrm{~kJ}$ $\mathrm{mol...

On heating, $$\mathrm{LiNO_3}$$ gives how many compounds among the following __________ $$\mathrm{Li_2O,N_2,O_2,LiNO_2,NO_2}$$

BeO reacts with HF in presence of ammonia to give [A] which on thermal decomposition produces [B] and ammonium fluoride. Oxidation state of Be in [A] ...