Science and Technology › Chemistry

(a)

Only one

(b)

Only two

(c)

All the three

(d)

None

(a)

it is dipolar in nature

(b)

it is a good conductor of heat

(c)

it has high value of

(d)

it is an oxide of hydrogen

(a)

1 and 2 only

(b)

3 only

(c)

1, 2 and 3 only

(d)

None of the above

(a)

exposure to sunlight is prevented

(b)

concentration of carbon dioxide in the environment is increased

(c)

rate of respiration is decreased

(d)

there is an increase in humidity

(a)

Aspartame is as sweet as table sugar, but unlike table sugar, it is not readily oxidized in the human body due to lack of requisite enzymes.

(b)

When aspartame is used in food processing, the sweet taste remains, but it becomes resistant to oxidation.

(c)

Aspartame is as sweet as sugar, but after ingestion into the body, it is converted into metabolites that yield no calories.

(d)

Aspartame is several times sweeter than table sugar, hence food items made with small quantities of aspartame yield fewer calories on oxidation.

(a)

A mercury coating on the inside of the lamp makes the light bright white

(b)

When the lamp is switched on, the mercury in the lamp causes the emission of ultra-violet radiations

(c)

When the lamp is switched on, it is the mercury which converts the ultra-violet energy into visible light

(d)

None of the statement given above is correct about the use of mercury in the manufacture of fluorescent lamps

(a)

the formation of hydrochloric acid when chlorine is added to water

(b)

the formation of hypochlorous acid when chlorine is added to water

(c)

the formation of nascent oxygen when chlorine is added to water

(d)

the formation of hydrogen when chlorine is added to water

(a)

Potato is mainly made up of starch whereas paper is mainly made up of cellulose

(b)

Potato transmits microwaves whereas paper reflects microwaves

(c)

Potato contains water whereas paper does not contain water

(d)

Potato is a fresh organic material whereas paper is a dead organic material.

(a)

Phosphorous Trichloride

(b)

Mercuric Oxide

(c)

Graphite

(d)

Nitroglycerine

(a)

Argon

(b)

Neon

(c)

Xenon

(d)

Nitrous oxide