Ether and benzene can be separated by :-

(1) Filtration

(2) Distillation

(3) Crystallization

(4) Sublimation

Which one of the following statements regarding photochemical smog is not correct?

(1) Photochemical smog is formed through a photochemical reaction involving solar energy

(2) Photochemical smog does not cause irritation in eyes and throat.

(3) Carbon monoxide does not play any role in photochemical smog formation

(4) Photochemical smog is an oxidizing agent in character

... is not a greenhouse gas :-
1. Hydrogen
2. Carbon dioxide
3. Methane
4. Nitrous oxide or $N_{2}O$

Which one of the following is not a common component of Photochemical Smog?

(1) Ozone

(2) Acrolein

(3) Peroxyacetyl

(4) Chlorofluorocarbons

In Kjeldahl's method for estimation of nitrogen present in a soil sample, ammonia evolved from 0.75 g of sample neutralized 10 mL of 1 M $H_{2}S{O}_4$. The percentage of nitrogen in the soil is:

(1) 37.33

(2) 45.33

(3) 35.33

(4) 43.33

The concentration of Peroxy Acetyl Nitrate (PAN) maximum in:-

(1) Fog

(2) Smoke

(3) Smog

(4) Photochemical smog

The Lassaigne's extract is boiled with conc. $HN{O}_3$  while testing for the halogens. By doing so it :-

(1) decomposes $N{a}_{2}S$ and NaCN, if formed

(2) helps in the precipitation of AgCl

(3) increases the solubility product of AgCl

(4) increases the concentration of $N{O}_3^{-}$ ions

Soil conservation is the process where

1. Soil is aerated

2. Soil erosion is allowed

3. Soil is protected against loss

4. Sterile soil is converted into fertile soil

Soil erosion can be prevented by : 

1. Overgrazing

2. Removal of vegetation

3. Afforestation (Plantation)

4. Increasing bird population

Soil erosion is greater when

(1) No rain occurs

(2) Winds do not blow

(3) The rainfall is evenly distributed

(4) The Rainfall is received in heavy down pour