Question

B.
Identify the error in the given statements. Circle the incorrect word and write the correct word in
the blank.
1. Oxygen is mainly present as a triatomic molecule.
2. A mixture of oxygen and sulphur dioxide is used as a medical anaesthesia gas.
3. Trinitrotoluene is used as a refrigerant in hospitals for storing and preserving
blood, tissues and comea of the eye.
4. Carbon dioxide is 3.5 times heavier than air.
5. Carbon cycle is the natural process by which water is circulated throughout
the earth.
6. Among all the inert gases, krypton is the most abundant in air

Choose the correct option.
C.
gases.
1.
proved that air is a mixture of
(a) Jean-Antoine Chaptal
(b) Daniel Rutherford
(c) Antoine Lavoisier
(d) None of these
2. Which of the following is used as a rocket propellant?
(a) Carbogen
(b) A mixture of oxygen and nitrous oxide
(c) A mixture of oxygen and sulphur dioxide (d) Liquid oxygen
3. Which of the following is an important constituent of proteins that are necessary for the growth of
plants and animals?
(a) Argon
(b) Carbon dioxide
(c) Nitrogen
(d) Krypton
4. Carbon dioxide is added to the atmosphere by
(a) respiration
(b) combustion of fossil fuels
(c) volcanic eruptions
(d) all of these
5. Which of the following is precipitation that consists of small pellets of ice formed by the freezing of
raindrops or of melted snowflakes?
(a) Fog
(b) Sleet
(c) Snow
(d) Hail
6. Which of the following inert gases is used for welding metals?
(a) Helium
(b) Neon
(c) Argon
(d) Xenon​

Answer 1

Answer:

B.

1 - Oxygen - Ozone

2 - Sulphur dioxide - Nitrous oxide

3 - Trinitrotoluene - Liquid nitrogen

4 - 3.5 - 1.53

5 - Carbon cycle - Water cycle

6 - Krypton - Argon

C.

1 - Antoine Lavoisier

2 - Liquid oxygen

3 - Carbon dioxide

4 - all of these

5 - Steel

6 - Argon

Explanation:

MARK ME AS BRAINLIST

Answer 2

Answer:

B) 1.Triatomic - Diatomic

2Sulphur dioxide - Nitrous oxide

3.Trinitrotoluene - Liquid nitrogen

4.3.5 - 1.53

5.Carbon cycle - Water cycle

6.Krypton - Argon

C) 1. (C)

2. (d)

3.(b)

4.( d)

5.( b)

6. (C)

HOPE IT IS HELP FULL