The S-block Elements

Which one of the following ions has the largest size in aqueous solution?

Calgon is used for water treatment. Which of the following statement is NOT true about Calgon?

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

The correct order of melting point is:

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

Identify the correct statement from B₂H₆ from those given below :

(A) In B₂H₆, all B-H bonds are equivalent

B) In B₂H₆, there are four 3-centre 2- electron bonds

C) B₂H₆ is a Lewis acid

(D) B₂H₆ can be synthesized from both BF₃ and NaBH₄.

(E) B₂H₆ is planar molecule.

  Choose the most appropriate answer from the options given below

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 oxygen to give superoxide.

(C) LiF is less soluble in water than other alkali metal fluorides.

(D) Li₂O is more soluble in water than other alkali metal oxides.

Choose the most appropriate answer from the options given below :

Consider the following reactions of 1A metals.

M + $\left(x+y\right)N{H}_3$ $\stackrel{}{\to }{\left[M{\left(N{H}_3\right)}_x\right]}^{+}+{\left[e{\left(N{H}_3\right)}_y\right]}^{-}$  

$M_{\left(am\right)}^{+}+e^{-}+N{H}_3\left(\mathcal{l}\right)\stackrel{}{\to }MN{H}_{2\left(am\right)}+\frac{1}{2}{H}_2\left(g\right)$

Which of the following statement is

INCORRECT?

Among the following statements, identify the correct set of statements:
(A) Size of Li is smaller than Mg
(B) Both Li and Mg form covalent compounds readily
(C) Both Li and Mg react with nitrogen and form nitride
(D) Oxides of Li and Mg do not combine with excess oxygen to give superoxides

Identify the correct option from below:

Among the nitrates of alkaline earth metals, the thermal stability of Mg(NO₃)₂ and Sr(NO₃)₂ respectively are: