1. Match the following :

A. Optical isomerism	(i) glycine
B. Zwitter ion	(ii)  lactic acid
C. Lewis acid	(iii) ebullioscopic method
D. Lewis acid	(iv) formaldehyde
E. Urotropine	(v) aluminium chloride

 Fill in the blanks by choosing the appropriate words from those given in brackets :   

[Entropy, energy, MnO₂, CuO, +M, –M, +I, –I, directly, inversely, sulphuric acid, hydrochloric acid, nitric acid, square, cube, square root, universe, buffer action, salt hydrolysis, acidic, basic, decreases, increases].

(i) When a spontaneous process takes place, it is accompanied by an increase in the total ______of the______.

(ii) The degree of dissociation of a weak electrolyte is______proportional to the______of its molar concentration.

(iii) Sodium acetate solution is______because of________.

(iv) In the laboratory, bromine can be obtained by heating a mixture of KBr and_______with conc. _______.

(v) An alkyl group attached to the carbonyl group exerts a ________effect and thus______the reactivity of carbonyl group.

Complete the following statements by selecting the correct alternative from the choices given: 

Dehydration of an amide with phosphorus pentoxide yields :

• Ammonia 

• Alkyl cyanide

• Alkyl isocyanide

• Alkyl amine

Complete the following statements by selecting the correct alternative from the choices given: 

The lowest freezing point of 0.1 M aqueous solution is of:

• K₂SO₄ 
• NaCl
• Urea
• Urea

Complete the following statements by selecting the correct alternative from the choices given: 

A basic buffer can be prepared by mixing :

• CH₃COONa and CH₃COOH  
• Na₂SO₄ and H₂SO₄
• NaCl and NaOH
• NaCl and NaOH

Complete the following statements by selecting the correct alternative from the choices given: 

The standard reduction electrode potentials of four elements A, B, C and D are -3.05, 1.66, -0.40 and 0.80 volts respectively. The highest chemical activity will be shown by :

• A
• B
• C 
• C 

Complete the following statements by selecting the correct alternative from the choices given: 

The solubility of iodine in water may be increased by adding :

• Potassium iodide 
• Chloroform
• Carbon disulphide
• Carbon disulphide