21.

The order of solubility of lithium halides in non-polar solvents follows the order:

• LiI > LiBr > LiCl > LiF

• LiF > LiI > LiBr > LiCl

• LiCl > LiF > LiI > LiBr

Which of the following is used as a source of oxygen in space capsules , submarines and breathing masks?

• Li₂O

• Na₂O₂

• KO₂

• K₂O₂

Which of the following is not a cumulated diene?

• Hexa - 2 , 3 - diene

• Penta - 1 , 3 - diene

• Hexa - 1 , 2 - diene

• Penta - 2 , 3 - diene

What is the product P ?

• 

• 

• 

• Both (a) and (b)

The standard reduction potentials of half reactions are given below:

F₂ (g) + 2e^- $\to$ 2F^- (aq) ; E⁰ = + 2.85 V

Cl₂ (g) + 2e^- $\to$2Cl^- (aq) ; E⁰ = + 1.36 V

Br₂ (g) + 2e^- $\to$2Br^- (aq) ; E⁰ = + 1.06 V

I₂ (g) + 2e^- $\to$ 2I^- (aq) ; E⁰ = + 0.53 V

The strongest oxidising and reducing agents respectively are:

• chlorine and iodine

• fluorine and iodine ion

• chloride and bromine

• bromine and iodine

A compound CuCl has face-centred cubic structure. Its density is 3.4 g cm^-3 , The length of unit cell is:

• 8.734 $\stackrel{0}{\mathrm{A}}$

• 5.834 $\stackrel{0}{\mathrm{A}}$

• 5.783 $\stackrel{0}{\mathrm{A}}$

• 8.153 $\stackrel{0}{\mathrm{A}}$

One of the following metals forms a volatile compound and this property is taken advantage for its extraction. This metal is:

• iron

• nickel

• cobalt

• tungsten

Intramolecular hydrogen bonding is present is:

• nickel dimethyl glyoximate

• anti-pyridine-2-carboxaldoxime

• maleic acid monoanion

• All of the above

Equivalent conductance of O .0128 N acetic acid solution, at 25°C is 14 ohm^-1 eq^-1 and at infinite dilution is 391 ohm-1eq^-1 .The degree of dissociation of acetic acid in the solution and its dissociation constant, respectively are:

• 0.036 and 1.66x10^-5

• 0.121 and 1.78x10^-4

• 0 .213 and 1.84x10^-5

• O .054 and 1.94x10^-4

Ag | AgCl | Cl^- (C₂) || Cl^- (C₁) | AgCl | Ag for this cell $∆$G is negative if:

• C₁ = C₂

• C₁ > C₂

• C₂ > C₁

• both (a) and (b)