Problem 1
Metals having ns \(^{1}\) as the valence electronic configuration (a) have a first ionization potential of more than \(10 \mathrm{eV} /\) atom (b) are highly electropositive (c) are highly electronegative (d) act as strong oxidizing reagents
Problem 2
The oxidation state of sodium in sodium amalgam is (a) \(-1\) (b) \(+1\) (c) \(+2\) (d) 0
Problem 3
Which of the following does not give flame colouration? (a) \(\mathrm{Mg}\) (b) \(\mathrm{Ca}\) (c) \(\mathrm{Sr}\) (d) \(\mathrm{Ba}\)
Problem 4
Which of the following alkali metal ions has the lowest ionic mobility in aqueous solution? (a) \(\mathrm{Na}^{+}\) (b) \(\mathrm{Li}^{+}\) (c) \(\mathrm{Rb}^{+}\) (d) \(\mathrm{Cs}^{+}\)
Problem 5
Which type of ion does the anhydrons mixture of KF and HF contain? (a) \(\mathrm{KH}^{+}, \mathrm{F}^{-}\) (b) \((\mathrm{KF})^{+}(\mathrm{HF})^{-}\) (c) \(\mathrm{K}^{+}, \mathrm{H}^{+}, \mathrm{F}^{-}\) (d) \(\mathrm{K}^{+}, \mathrm{HF}_{2}^{-}\)
Problem 6
What are the products formed when \(\mathrm{Li}_{2} \mathrm{CO}_{3}\) undergoes decomposition? (a) \(\mathrm{LiO}_{2}+\mathrm{CO}\) (b) \(\mathrm{Li}_{2} \mathrm{O}+\mathrm{CO}\) (c) \(\mathrm{Li}_{2} \mathrm{O}_{2}+\mathrm{CO}\) (d) \(\mathrm{Li}_{2} \mathrm{O}+\mathrm{CO}_{2}\)
Problem 7
Which among the following is most soluble in alcohol? (a) \(\mathrm{KClO}_{4}\) (b) \(\mathrm{NaClO}_{4}\) (c) \(\mathrm{CsClO}_{4}\) (d) \(\mathrm{LiClO}_{4}\)
Problem 8
The metal that dissolves in liquid ammonia, giving a dark blue coloured solution is (a) lead (b) tin (c) silver (d) sodium
Problem 9
The pair of elements that have similar chemical properties is (a) beryllium and boron (b) lithium and magnesium (c) carbon and nitrogen (d) aluminium and magnesium
Problem 11
Photoelectric effect is maximum in (a) \(\mathrm{K}\) (b) \(\mathrm{Cs}\) (c) \(\mathrm{Na}\) (d) \(\mathrm{Li}\)
