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 351 Discuss
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Which among the following is used in 'Bulletproof Jackets'?

A
nylon-6
B
kevlar
C
polystyrene
D
bakelite

Answer & Explanation

Correct Option: B

Kevlar is a high-strength synthetic fiber with exceptional heat resistance and durability.
Question 352 Discuss
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Which among the following is used to 'Denature' alcohol?

A
methanol
B
ethanol
C
propanol
D
butanol

Answer & Explanation

Correct Option: A

Methanol is added to ethanol to make it poisonous and unfit for human consumption.
Question 353 Discuss
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Which among the following is known as 'Heavy Hydrogen'?

A
protium
B
deuterium
C
tritium
D
helium

Answer & Explanation

Correct Option: B

Deuterium (2H) is called heavy hydrogen because it has a neutron, making it twice as heavy as protium.
Question 354 Discuss
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Which among the following is used in 'Nuclear Medicine' to study kidney function?

A
iodine-131
B
technetium-99m
C
carbon-11
D
oxygen-15

Answer & Explanation

Correct Option: B

Technetium-99m is the most widely used medical radioisotope for imaging various organs.
Question 355 Discuss
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What is the primary constituent of 'Pearl'?

A
calcium sulphate
B
calcium carbonate and magnesium carbonate
C
silicon dioxide
D
sodium chloride

Answer & Explanation

Correct Option: B

Pearls are made of nacre, which is mostly calcium carbonate (aragonite) with a small amount of conchiolin.
Question 356 Discuss
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Which among the following is used in 'Making' permanent magnets?

A
soft iron
B
steel
C
aluminum
D
copper

Answer & Explanation

Correct Option: B

Steel or Alnico alloys are used for permanent magnets because they have high retentivity and coercivity.
Question 357 Discuss
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Which among the following is used in 'Artificial Heart' valve?

A
teflon
B
nylon
C
pyrolytic carbon
D
bakelite

Answer & Explanation

Correct Option: C

Pyrolytic carbon is biocompatible and used for the leaflets of mechanical heart valves.
Question 358 Discuss
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Which among the following is the 'Source of Energy' in nuclear power plants?

A
nuclear fusion
B
nuclear fission
C
radioactive decay
D
chemical reaction

Answer & Explanation

Correct Option: B

Controlled nuclear fission of heavy nuclei like U-235 releases energy to produce steam and electricity.
Question 359 Discuss
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Which of the following describes the 'Goldstein's Experiment' result?

A
discovery of electrons
B
discovery of protons
C
discovery of neutrons
D
discovery of the nucleus

Answer & Explanation

Correct Option: B

Eugen Goldstein used a perforated cathode in a discharge tube to discover 'canal rays,' which were later identified as protons.
Question 360 Discuss
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Which among the following elements has the highest second ionization enthalpy?

A
lithium
B
beryllium
C
boron
D
carbon

Answer & Explanation

Correct Option: A

After losing one electron, Lithium attains a stable noble gas configuration (He), making the removal of a second electron extremely difficult.
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