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UPSC CAPF AC Paper - I
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Table salt gets moist during rainy season because:

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Important Questions on Chemistry

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UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 182
Which one among the following is called philosopher's wool?
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UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 183

Consider the following statements.

I. Liquid sodium is employed as a coolant in nuclear reactors.

II. Calcium carbonate is an ingredient of toothpaste.

III. Bordeaux mixture consists of sodium sulphate and lime.

IV. Zinc amalgams are used as a dental filling.

Which of the above statement(s) is/are correct?

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UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 184

Consider the following statements.

I. Baking soda is used in fire extinguishers.

II. Quicklime is used in the manufacture of glass.

III. Gypsum is used in the manufacture of plaster of Paris.

Which of the statement(s) given above is/are correct?

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UPSC CAPF AC Paper - I
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Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 185
Sodium vapour lamps glow with yellow colour. This is due to:
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UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 186
Two reactants in a flask produce bubbles of gas, and it turns lime water into milky. The reactants in the flask are:
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UPSC CAPF AC Paper - I
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Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 187

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 statement(s) given above is/are correct?

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UPSC CAPF AC Paper - I
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Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 188

Which of the following statements about diamond are correct?
I. It is used as a gem in jewellery because of its ability to reflect light.
II. It is a good conductor of electricity.
III. It is used for cutting glass, marble, stones and other hard materials.
IV. It is used for drilling of rocks.

(Select the correct answer using the codes given below.)

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UPSC CAPF AC Paper - I
IMPORTANT
Encyclopedia of General Science for General Competitions>Chapter 2 - Chemistry>Assessment>Q 189
Which of the following is not a method of preparing oxygen?