Treatment of benzoic acid with Cl₂/FeCl₃ will give________ acid.
 1) o-chlorobenzoic.
 2) p-chlorobenzoic.
 3) m-chlorobenzoic.
 4) 2,4-dichlorobenzoic.

The adsorption of a gas, on a solid surface, varies with pressure of the gas in which of the following manner?

1) Slow fast independent of the pressure
2) Fast slow independent of the pressure
3) Independent of the pressure slow fast
4) Independent of the pressure fast slow

Identify the reagents $$A$$ and $$B$$ respectively in the following reactions
$$C{ H }_{ 3 }COOH\underrightarrow { \quad \quad A\quad \quad  } C{ H }_{ 3 }COCl\underrightarrow { \quad \quad B\quad \quad  } C{ H }_{ 3 }CHO$$ 

1) $$SO{ Cl }_{ 2 },{ { H }_{ 2 } }/{ pd }-BaS{ O }_{ 4 }$$
2) $${ { H }_{ 2 } }/{ pd }-BaS{ O }_{ 4 },SO{ Cl }_{ 2 }$$
3) $$SO{ Cl }_{ 2 },{ H }_{ 2 }{ O }_{ 2 }$$
4) $$SO{ Cl }_{ 2 },Os{ O }_{ 4 }$$

The conductivity of 0.20 M solution of KCl at 298 K is 0.0248S cm⁻¹. Calculate its molar conductivity.

1) 112 Scm²mol⁻¹
2) 124Scm²mol⁻¹
3) 136Scm²mol⁻¹
4) 148Scm²mol⁻¹

In the Friedel-Crafts acylation reaction, the electrophile is

1) R⁺
2)
3) R−C.=O
4)

Which of the following reagents would distinguish cis-cyclopenta−1, 2−diol from the trans-isomer?

1) Acetone
2) Ozone
3) MnO₂
4) Aluminium isopropoxide

Refrigeration helps in food preservation by

1)  greatly reducing the rates by biochemical reaction

2)  sealing the food with a layer of ice

3)  destroying enzyme action

4)  killing the germs

Clemmensen reduction of a ketone is carried out in the presence of which of the following reagent?

1) $$Zn-Hg$$ with $$HCl$$
2) $$LiAl{H}_{4}$$
3) $${H}_{2}$$ and $$Pt$$ as catalyst
4) Glycol with $$KOH$$

Anhydrous FeSO4 is

1)  brown

2)  green

3)  white

4)  black

Given
C + 2S → CS₂ , ΔH_f^o=+ 117.0 kJ/mol
C+ O2 → CO₂ , ΔH_f^o=- 393.0 kJ/mol
S+ O₂ → SO₂ , ΔH_f^o=- 287.0 kJ/mol
The heat of combustion of
CS₂ + 3O₂ → CO₂ + 2SO₂ is

1) - 807 kJ/mol
2) -1104 kJ/mol
3) +1104 kJ/mol
4) +807 kJ/mol