The most convenient method to remove a phenolic group from a compound is to

 1. reduce it using Tin and HCl.
 2. heat it strongly with Copper
 3. reduce it strongly with SnCl2.
 4. disfill it with Zn dust

An aqueous solution of non-electrolyte 'A' with molecular mass 60 contains 6 g in 500 ml and has a density equal to 1.05. The molality of solution is

1)  0.30

2)  0.25

3)  0.19

4)  1.25

The heat liberated when 1.89g of benzoic acid is burnt in a bomb calorimeter at 25^oC increases the temperature of 18.94kg of water by 0.632^oC. If the specific heat of water at 25^oC is 0.998 cal/g deg, the value of the heat of combustion of benzoic acid is

1) 881.1 kcal
2) 771.4 kcal
3) 981.1 kcal
4) 871.2 kcal

The half - life period t_½ of a radioactive element is N years. The period of its complete decay is :

1)2 N years
2)N² Years
3)infinity
4)½ N² Years

X on treatment with sodium hydroxide followed by the addition of silver nitrate gives white precipitate at room temp, which are soluble in NH₄OH. X can be

1)  Vinyl chloride

2)  Benzyl chloride

3)  Ethyl bromide

4)  Chloro benzene

Among the following, which are ambidentate ligands?
(i) SCN⁻
(ii) $$NO^-_3$$
(iii) $$NO^-_2$$
(iv) $$C_2O^{2-}_4$$

1) (i) and (iii)
2) (i) and (iv)
3) (ii) and (iii)
4) (ii) and (iv)

Ethyl alcohol gives ethyl chloride with the help of

1)  KCl

2)  Cl₂

3)  SOCl₂

4)  NaCl

The final product formed when acetaldehyde is reduced with sodium and alcohol is

1) Ethane
2) Ethyl alcohol
3) Ethylene
4) All

The maximum number of isomers (including stereoisomers) that are possible on monochlorination of the following compound, is


1) 4
2) 7
3) 6
4) 8

The correct sequence of decreasing order of reactivity of hydrolysis of acid chlorides is :

1) PhCOC l> p−O2NC6H4COCl > p−CH₃OC₆H₄COCl
2) PhCOCl > p−CH₃OC6H4COCl > p−O2NC₆H₄COCl
3) p−O₂NC₆H₄COCl > PhCOCl > p−CH₃OC₆H₄COCl
4) p−O₂NC₆H₄COCl > p−CH₃OC₆H₄COCl > PhCOCl