Chemistry MCQS for Class 10 Chapter 6

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Chemistry MCQS for Class 10


Incinerator reduces solid waste into .
Heat
Ash
All of them
Flue gas

Infrared radiations emitted by the Earth are absorbed by.
CO2and N2
CO2 and H2O
N2 and O2
O2and CO2

A strange bitter smell noticed near photo copier machine is of.
O3
O2
H2S
SO2

Ozone is beneficial for us as it
Absorb Air pollulant
Absorb Chlorofluorocarbons
Absorb Ultraviolet radiations.
Absorb infrared radiation.

ozone depletion (i.e O3————–> O2 + O) occurs in:
lower stratosphere
middle stratosphere
upper stratosphere
troposphere

Acid rain damages the building it is due to reaction on.
Calcium oxilat
Calcium sulphate
Calcium nitrate
Calcium carbonate

Percentage of nitrogen in atmosphere is:
0.93%
0.03%
20.94%
78.09%

The region in which ozone layere depletes is called.
None of them
Both of them
Black hole
Ozone hole

In the troposphere (lowest layer), the temperature decreases form 17°C to;
-58°C
-49°C
-61°C
-93°C

Which metal present in acid rain affect the aquatic life by clogging fish gills?
Aluminium
Mercury
Chromium
Lead

Ozone is beneficial for us as it absorbs…………………
Ultraviolet radiations
Chlorofluorocarbons
Air pollutants
Infrared Radiations

Carbon monoxide is harmful to use because it:
Reduce oxygen carrying ability of hemoglobin
Make the blood coagulate
Damages lungs
Paralyses lungs

Which is not a character of SO2
It do not form sulphuric acid
It has irritating smell
it is a colourless gas
It causes suffocation

In the bacterial decay, the compound of which element are emitted.
Sulphur
All of them
Carbon
Nitrogen

Which gas is not present in atmosphere?
Nitrogen
Oxygen
Helium
Carbon dioxide

The process by which atmospheric nitrogen is turned into nitrates in the soil is called.
Nitration
Fixing
Reduction
Oxidation

Ozone depletion was first noticed is.
1960’s
1980’s
1990’s
1970’s

By the increase in the concentration of CO2 in air.
Increase in heat energy.
None of them
Heat energy remains same
Decrease in heat energy

Which gas like a glass wall of g green house:
CO2
O2
N2
CO

Which is not a poisonous gas?
All of them
Chlorine
Ozone
Carbon di oxide

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