Glycerol is purified by

1) Steam distillation

2) Sublimation

3) Simple distillation

4) Vacuum distillation

In the reaction $${ C }_{ 2 }{ H }_{ 5 }{ OH }_{ 2 }{ H }_{ 5 }+CO\begin{matrix} { BF }_{ 3500atms } \\ \longrightarrow  \\ { 150 }^{ \circ  }C \end{matrix}X$$. What is $$X$$?

1) Diethyl carbonate
2) Ethyl carbonate
3) Diethyl peroxide
4) Ethyl propionate

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) $$SO{ Cl }_{ 2 },Os{ O }_{ 4 }$$

A compound X, when boiled with Na₂CO₃ solution gives glycol as the product. What is X

1) Ethylene
2) Ethylene oxide
3) Ethyl bromide
4) Ethy hydogen sulphate

0.1 mole of CH₃NH₂ (K_b = 5 × 10^-4) is mixed with 0.08 mole of HCl and diluted to 1L. What will be the H⁺ concentration in the solution ?

1) 8 × 10^-2 M
2) 8 × 10^-11 M
3) 1.6 × 10^-11 M
4) 8 × 10^-5 M

What volume of decinormal K₂Cr₂O₇ solution would be needed to convert 1.19 g of tin to stannic chloride in an acidic medium? (ASn = 119ASn = 119)

1) 400 ml
2) 200 ml
3) 100 ml
4) 2800 ml

20 mL solution of 0.1 M ferrous sulphate was completely oxidised using a suitable oxidising agent. What is the number of electrons exchanged?

1) 1.204 x 10²²
2) 193
3) 1930
4) 1.204 x 10²¹

The ions O²⁻, F⁻, Na⁺, Mg²⁺ and Al³⁺ are isoelecronic. Their ionic radii show:

1) a significant increase from O²⁻ to Al³⁺ 
2) a significant decrease from O²⁻ to Al³⁺
3) an increase from O²⁻ to F⁻ and then decrease from Na⁺ to Al³⁺
4) an decrease from O²⁻ to F⁻ and then increase from Na⁺ to Al³⁺

When a mixture of carbon monoxide and chlorine is exposed to sunlight the product formed is

1) thionyl chloride
2) phosgene
3) phosphine
4) carbon tetrachloride

The monomer of the polymer;