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 461 Discuss
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The 'Rate Constant' of a reaction is doubled when the temperature is raised from 300K to 310K. This is explained by:

A
boyle's law
B
arrhenius equation
C
charles's law
D
avogadro's law

Answer & Explanation

Correct Option: B

The Arrhenius equation $k = Ae^{-Ea/RT}$ shows how rate constant varies with temperature.
Question 462 Discuss
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Which of the following is used as an 'anti-freezing' agent in radiators?

A
methanol
B
ethylene glycol
C
glycerol
D
acetone

Answer & Explanation

Correct Option: B

Ethylene glycol lowers the freezing point and raises the boiling point of the coolant.
Question 463 Discuss
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The 'Dipole Moment' of carbon tetrachloride (CCl4) is:

A
very high
B
zero
C
same as hcl
D
negative

Answer & Explanation

Correct Option: B

CCl4 is symmetrical (tetrahedral), so individual C-Cl bond dipoles cancel each other out.
Question 464 Discuss
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Which among the following is an 'addition polymer'?

A
nylon 6
B
terylene
C
pvc
D
bakelite

Answer & Explanation

Correct Option: C

PVC is formed by the repeated addition of vinyl chloride monomers without the loss of small molecules.
Question 465 Discuss
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The 'Surface Tension' of a liquid generally:

A
increases with temperature
B
decreases with temperature
C
remains constant
D
is independent of density

Answer & Explanation

Correct Option: B

Heating increases the kinetic energy of molecules, weakening the intermolecular attractive forces.
Question 466 Discuss
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Which of the following is used in 'Vulcanization' to make rubber harder?

A
carbon
B
sulfur
C
phosphorus
D
magnesium

Answer & Explanation

Correct Option: B

Sulfur forms cross-links between polymer chains, improving durability and elasticity.
Question 467 Discuss
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Which gas is used in 'Cryogenic' surgery?

A
liquid oxygen
B
liquid nitrogen
C
liquid helium
D
argon

Answer & Explanation

Correct Option: B

Liquid nitrogen provides the extreme cold (approx -196 C) needed to freeze and destroy diseased tissue.
Question 468 Discuss
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Which among the following is used as an 'anti-acid' (Antacid)?

A
sodium carbonate
B
magnesium hydroxide
C
sodium hydroxide
D
calcium chloride

Answer & Explanation

Correct Option: B

Milk of Magnesia (Mg(OH)2) neutralizes excess HCl in the stomach.
Question 469 Discuss
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The 'Boyle's Law' describes the relationship between:

A
V and T at constant P
B
P and V at constant T
C
P and T at constant V
D
V and n at constant P

Answer & Explanation

Correct Option: B

Boyle's Law states that pressure and volume are inversely proportional for a fixed mass of gas.
Question 470 Discuss
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Which of the following is used in 'Lignite' to improve its quality?

A
water
B
air
C
bitumen
D
briquetting

Answer & Explanation

Correct Option: D

Lignite is often pressed into briquettes to reduce moisture and increase efficiency.
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