Lithium is the strongest reducing agent because of

• its greater hydration energy

• its high ionization energy

• its high electron affinity

• its low electronegativity

Which of the following is an organometallic compound?

• Lithium acetate

• Methyl lithium

• Lithium dimethyl amide

• Lithium methoxide

The first ionisation potential (in eV) of N and O atoms are

• 14.6, 13.6

• 13.6, 14.6

• 13.6, 13.6

• 14.6, 14.6

"ELEKTRON" is an alloy of

• Cu, Zn and Mg

• Fe and Mg

• Ni and Zn

• Al and Zn

Correct order for solubility of alkaline earth metals in water is 

• MgF₂ > CaF₂ > SrF₂ > BaF₂

• MgF₂ <CaF₂ <SrF₂ <BaF₂

• MgF₂ > CaF₂ < SrF₂ < BaF₂

• BaF₂ >MgF₂ >SrF₂ >CaF₂ 

316.

The second ionisation enthalpies of Li, Be, B and C are in order

• Li > B > C > Be

• Li > C > B > Be

• Be > C > B > Li

• B > C > Be > Li

The ionic species having the largest size is

• Li⁺ (g)

• Rb⁺(aq)

• Li⁺(aq)

• Cs⁺(aq)

The first four ionisation enthalpy values of an element are 191 kcal mol^-1 578 kcal mol^-1 872 kcal mol^-1 and 5962 kcal mol^-1 .The number of valence electrons in the element is

• 1

• 2

• 3

• 4

The ion having the highest mobility in aqueous solution is

• Ba²⁺

• Mg²⁺

• Ca²⁺

• Be²⁺

The main product obtained when a solution of sodium carbonate reacts with mercuric chloride is

• Hg(OH)₂

• HgCO₃HgO

• HgCO₃

• HgCO₃.Hg(OH)₂