General Science Jkssb Chemistry Set 1 Mcqs (504 MCQs) | JKSSB & SSC Quiz

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jkssb chemistry set 1 mcqs

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Practice Questions

504 Total
Question 341 Discuss
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Which among the following is known as 'Philosophers Wool'?

A
magnesium oxide
B
zinc oxide
C
aluminum oxide
D
calcium oxide

Answer & Explanation

Correct Option: B

Zinc oxide (ZnO) was historically called philosopher's wool because of its white, wool-like appearance when burned.
Question 342 Discuss
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Which among the following is used in 'Matching' industry (Matchsticks)?

A
white phosphorus
B
red phosphorus
C
yellow phosphorus
D
black phosphorus

Answer & Explanation

Correct Option: B

Red phosphorus is used on the striking surface of matchboxes because it is safer than white phosphorus.
Question 343 Discuss
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Which gas is used in 'Lamps' for lighthouse?

A
acetylene
B
methane
C
neon
D
argon

Answer & Explanation

Correct Option: A

Acetylene (Ethyne) burns with a very bright flame and was historically used in lighthouse illumination.
Question 344 Discuss
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Which among the following is used as a 'Water Purifier'?

A
alum
B
borax
C
common salt
D
sugar

Answer & Explanation

Correct Option: A

Alum (Potassium aluminum sulphate) is used to coagulate and settle suspended impurities in water.
Question 345 Discuss
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Which among the following is used in 'Firecrackers' for green color?

A
strontium
B
barium
C
calcium
D
sodium

Answer & Explanation

Correct Option: B

Barium salts (like Barium chloride) produce a green color when burned in fireworks.
Question 346 Discuss
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Which among the following is used in 'Batteries' of mobile phones?

A
lithium
B
sodium
C
magnesium
D
zinc

Answer & Explanation

Correct Option: A

Lithium-ion batteries are preferred for mobile devices due to their high energy density.
Question 347 Discuss
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Which among the following is known as 'Fool's Gold'?

A
iron pyrite
B
copper sulphate
C
silver nitrate
D
zinc oxide

Answer & Explanation

Correct Option: A

Iron Pyrite (FeS2) has a metallic luster and brass-yellow color that resembles gold.
Question 348 Discuss
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Which among the following is the 'Most Poisonous' gas?

A
carbon dioxide
B
carbon monoxide
C
nitrogen dioxide
D
sulphur dioxide

Answer & Explanation

Correct Option: B

Carbon monoxide binds strongly to hemoglobin, preventing oxygen transport in the body.
Question 349 Discuss
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What is the common name of 'Borax'?

A
sodium borate
B
sodium carbonate
C
potassium nitrate
D
calcium sulphate

Answer & Explanation

Correct Option: A

Borax is a sodium salt of boric acid, chemically known as Sodium Tetraborate decahydrate.
Question 350 Discuss
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Which among the following is used as a 'Cleaning Agent' for glass?

A
ammonia
B
methanol
C
acetone
D
vinegar

Answer & Explanation

Correct Option: A

Ammonium hydroxide (dilute ammonia) is effective in removing grime from glass without leaving streaks.
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