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

General Science

jkssb chemistry set 1 mcqs

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Practice Questions

504 Total
Question 331 Discuss
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The 'Mass Number' of an element is the sum of:

A
protons and electrons
B
protons and neutrons
C
neutrons and electrons
D
protons only

Answer & Explanation

Correct Option: B

Mass number (A) = Number of protons (Z) + Number of neutrons (n).
Question 332 Discuss
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Which of the following is the 'Most Common' element in the universe?

A
oxygen
B
carbon
C
hydrogen
D
helium

Answer & Explanation

Correct Option: C

Hydrogen accounts for roughly 75% of all baryonic mass in the universe.
Question 333 Discuss
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Which among the following is used as a 'Refrigerant' in ACs and Fridges?

A
ammonia
B
freon
C
neon
D
argon

Answer & Explanation

Correct Option: B

Freon (chlorofluorocarbons or hydrofluorocarbons) is commonly used as a refrigerant.
Question 334 Discuss
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What is the common name of 'Calcium Carbonate'?

A
limestone
B
quicklime
C
slaked lime
D
bleaching powder

Answer & Explanation

Correct Option: A

CaCO3 is the main constituent of limestone, chalk, and marble.
Question 335 Discuss
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Which among the following is known as 'Dry Ice'?

A
solid oxygen
B
solid nitrogen
C
solid carbon dioxide
D
solid helium

Answer & Explanation

Correct Option: C

Solid CO2 is called dry ice because it sublimates directly into gas without melting.
Question 336 Discuss
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Which of the following is used in the 'Manufacture of Glass'?

A
sodium carbonate
B
sodium bicarbonate
C
sodium chloride
D
sodium sulphate

Answer & Explanation

Correct Option: A

Washing soda (Na2CO3) is used to lower the melting point of silica during glass making.
Question 337 Discuss
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Which among the following is the 'Hardest' natural substance?

A
iron
B
diamond
C
gold
D
platinum

Answer & Explanation

Correct Option: B

Diamond is the hardest known natural material due to its rigid 3D covalent network.
Question 338 Discuss
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Which gas is used in 'Electric Bulbs' to prolong the life of the filament?

A
oxygen
B
argon
C
hydrogen
D
methane

Answer & Explanation

Correct Option: B

Argon is an inert gas that prevents the tungsten filament from oxidizing and evaporating.
Question 339 Discuss
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Which among the following is used as an 'Anesthetic'?

A
methane
B
chloroform
C
methanol
D
acetylene

Answer & Explanation

Correct Option: B

Chloroform was historically used to induce unconsciousness during surgery.
Question 340 Discuss
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Which among the following is used in 'Photography'?

A
silver nitrate
B
silver bromide
C
sodium chloride
D
potassium nitrate

Answer & Explanation

Correct Option: B

Silver bromide (AgBr) is light-sensitive and used in photographic films.
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