Problem 1
The oxidation state of sodium in sodium amalgam is: (a) \(-1\) (b) \(+1\) (c) \(+2\) (d) 0
Problem 2
The number of electrons in \(\left[19 \mathrm{~K}^{40}\right]^{-1}\) are: (a) 18 (b) 20 (c) 30 (d) 40
Problem 3
Sodium amalgam is useful as: (a) Catalyst (b) Oxidizing agent (c) Bleaching agent (d) Reducing agent
Problem 4
Which of the following has the least ionization potential? (a) \(\mathrm{He}\) (b) Li (c) \(\mathrm{Zn}\) (d) \(\mathrm{N}\)
Problem 5
The correct order of increasing ionic character is: (a) \(\mathrm{BeCl}_{2}<\mathrm{MgCl}_{2}<\mathrm{BaCl}_{2}<\mathrm{CaCl}_{2}\) (b) \(\mathrm{BeCl}_{2}<\mathrm{MgCl}_{2}<\mathrm{CaCl}_{2}<\mathrm{BaCl}_{2}\) (c) \(\mathrm{BaCl}_{2}<\mathrm{CaCl}_{2}<\mathrm{MgCl}_{2}<\mathrm{BeCl}_{2}\) (d) \(\mathrm{BeCl}_{2}<\mathrm{BaCl}_{2}<\mathrm{MgCl}_{2}<\mathrm{CaCl}_{2}\)
Problem 6
The increasing order of atomic radius for the elements \(\mathrm{Na}, \mathrm{Rb}, \mathrm{K}\) and \(\mathrm{Mg}\) is: (a) \(\mathrm{Mg}<\mathrm{Na}<\mathrm{K}<\mathrm{Rb}\) (b) \(\mathrm{Rb}<\mathrm{K}<\mathrm{Mg}<\mathrm{Na}\) (c) \(\mathrm{Na}<\mathrm{K}<\mathrm{Mg}<\mathrm{Rb}\) (d) \(\mathrm{Na}<\mathrm{Mg}<\mathrm{K}<\mathrm{Rb}\)
Problem 7
The pair of elements that have similar chemical properties are: (a) Beryllium and boron (b) Lithium and magnesium (c) Carbon and nitrogen (d) Aluminium and magnesium
Problem 8
Lithium is strongest reducing agent among alkali metals due to which of the following factor? (a) Hydration energy (b) Electron affinity (c) Lattice energy (d) Ionization energy
Problem 9
The alkali metal that reacts with nitrogen directly to form nitride is: (a) \(\mathrm{K}\) (b) \(\mathrm{Na}\) (c) \(\mathrm{Li}\) (d) \(\mathrm{Rb}\)
Problem 10
The number of covalent bonds formed by beryllium is: (a) 4 (b) 5 (c) 2 (d) 3
