EASY
DRDO MTS Tier - II
IMPORTANT
Earn 100

Consider the following statements:

Chlorofluorocarbons, known as ozone-depleting substances, are used:

I. In the production of plastic foams

II. In the production of tubeless tyres

III. In cleaning certain electronic components

IV. As pressurizing agents in aerosol cans

Which of the statements given above is/are correct?

50% studentsanswered this correctly

Important Questions on Chemistry

MEDIUM
DRDO MTS Tier - II
IMPORTANT
General Science for Competitive Exams>Chapter 2 - Chemistry>MCQs>Q 161
In the industrial production of vegetable ghee, the process involved is:
EASY
DRDO MTS Tier - II
IMPORTANT
General Science for Competitive Exams>Chapter 2 - Chemistry>MCQs>Q 164
Which of the following is used as a mordant in dyeing?
EASY
DRDO MTS Tier - II
IMPORTANT
General Science for Competitive Exams>Chapter 2 - Chemistry>MCQs>Q 167
Darkening property of photochromatic glass is due to the presence of _____.
EASY
DRDO MTS Tier - II
IMPORTANT
General Science for Competitive Exams>Chapter 2 - Chemistry>MCQs>Q 168
Supersonic aircraft discharge which of the following substance into the stratosphere?
MEDIUM
DRDO MTS Tier - II
IMPORTANT
General Science for Competitive Exams>Chapter 2 - Chemistry>MCQs>Q 169
Chlorination is:
EASY
DRDO MTS Tier - II
IMPORTANT
General Science for Competitive Exams>Chapter 2 - Chemistry>MCQs>Q 170
When an iron nail is dipped in a copper sulphate solution, the iron nail becomes brownish and the blue colour of copper sulphate solution fades after sometimes. The reaction is an example of a chemical:
MEDIUM
DRDO MTS Tier - II
IMPORTANT
General Science for Competitive Exams>Chapter 2 - Chemistry>MCQs>Q 171
Bleaching powder is added in water used for drinking purpose. The role of bleaching powder, in this case, is _____.
HARD
DRDO MTS Tier - II
IMPORTANT
General Science for Competitive Exams>Chapter 2 - Chemistry>MCQs>Q 173

Consider the following statements:

I. Diamond is hard and graphite is soft.

II. Diamond is soft and graphite is hard.

III. Diamond is a bad conductor but graphite is a good conductor

IV. Diamond is a good conductor but graphite is a bad conductor.

Which of the statements given above is/are correct?