s-Block Elements

In context with beryllium, which one of the following statements is incorrect?

1. It is rendered passive by nitric acid.
2. It forms Be2C
3. Its salts rarely hydrolyze.
4. Its hydride is electron-deficient and polymeric.

On heating which of the following releases CO2 most easily?

1. Na2CO3
2. MgCO3
3. CaCO3
4. K2CO3

The function of "Sodium pump" is a biological process operating in each and every cell of all animals. Which of the following biologically important ions is also a constituent of this pump?

1. K+
2. Fe2+
3. Ca2+
4. Mg2+

Solubility of the alkaline earth metal sulphates in water decreases in the sequence

1. Sr > Ca > Mg > Ba
2. Ba > Mg > Sr > Ca
3. Mg > Ca > Sr > Ba
4. Ca > Sr > Ba > Mg

In Castner-Kellner cell for production of sodium hydroxide

1. brine is electrolyzed using graphite electrodes
2. molten sodium chloride is electrolysed
3. sodium amalgam is formed at mercury cathode
4. brine is electrolyzed with Pt electrodes

Which one of the alkali metals, forms only, the normal oxide, M2O on heating in air?

1. Rb
2. K
3. Li
4. Na

The ease of adsorption of the hydrated alkali metal ions on an ion-exchange resin follows the order :

1. Li+ < K+ < Na+ < Rb+
2. Rb+ < K+ < Na+ < Li+
3. K+ < Na+ < Rb+ < Li+
4. Na+ < Li+ < K+ < Rb+

Which of the following statements is incorrect?

1. Pure sodium metal dissolves in liquid ammonia to give blue solution.
2. NaOH reacts with glass to give sodium silicate.
3. Aluminium reacts with excess NaOH to give Al(OH)3.
4. NaHCO3 on heating gives Na2CO3.

Match List-I with List-II for the compositions of substances and select the correct answer using the codes given below.

1. (A)-(iii), (B)-(iv), (C)-(i), (D)-(ii)
2. (A)-(ii), (B)-(iii), (C)-(iv), (D)-(i)
3. (A)-(i), (B)-(ii), (C)-(iii), (D)-(iv)
4. (A)-(iv), (B)-(iii), (C)-(ii), (D)-(i)

Which one of the following is present as an active ingredient in bleaching powder for bleaching action?

1. CaOCl2
2. Ca(OCl)2
3. CaO2Cl
4. CaCl2