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 271 Discuss
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Which of the following is an example of a 'Colloid'?

A
salt solution
B
sugar solution
C
milk
D
air

Answer & Explanation

Correct Option: C

Milk is an emulsion where liquid fat is dispersed in water, a typical colloidal system.
Question 272 Discuss
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What is the primary gas found in 'Bhopal Gas Tragedy'?

A
carbon monoxide
B
methyl isocyanate
C
nitrogen dioxide
D
phosgene

Answer & Explanation

Correct Option: B

Methyl Isocyanate (MIC) leaked from the Union Carbide plant in 1984, causing one of the world's worst industrial disasters.
Question 273 Discuss
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The ability of Carbon to form long chains or rings is known as:

A
allotropy
B
isomerism
C
catenation
D
hybridization

Answer & Explanation

Correct Option: C

Catenation is the self-linking property of atoms to form stable covalent bonds, highest in Carbon.
Question 274 Discuss
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Which of the following is used in 'Pencils'?

A
charcoal
B
graphite
C
lead
D
coke

Answer & Explanation

Correct Option: B

Pencil 'lead' is actually a mixture of graphite and clay.
Question 275 Discuss
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Which of the following is a 'Synthetic Polymer'?

A
silk
B
wool
C
nylon
D
cotton

Answer & Explanation

Correct Option: C

Nylon is a human-made polyamide; others are naturally occurring polymers.
Question 276 Discuss
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Which element is used to manufacture the 'Heaters' of electric irons?

A
copper
B
tungsten
C
nichrome
D
aluminum

Answer & Explanation

Correct Option: C

Nichrome (Nickel and Chromium alloy) has high resistance and high melting point, ideal for heating elements.
Question 277 Discuss
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What is the common name of 'Calcium Hypochlorite'?

A
baking powder
B
bleaching powder
C
washing soda
D
plaster of paris

Answer & Explanation

Correct Option: B

Bleaching powder (CaOCl2) is used for disinfecting water and bleaching textiles.
Question 278 Discuss
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Which among the following is the 'Lightest Metal'?

A
hydrogen
B
lithium
C
sodium
D
magnesium

Answer & Explanation

Correct Option: B

Lithium is the metal with the lowest density (0.534 g/cm³); Hydrogen is the lightest element but is a non-metal.
Question 279 Discuss
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The 'Tyndall Effect' is a phenomenon of:

A
refraction of light
B
reflection of light
C
scattering of light
D
diffraction of light

Answer & Explanation

Correct Option: C

Tyndall effect is the scattering of light by colloidal particles, making the light beam visible.
Question 280 Discuss
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Which of the following is used in 'Flash Photography'?

A
neon
B
argon
C
xenon
D
helium

Answer & Explanation

Correct Option: C

Xenon produces a bright white flash when an electric current passes through it.
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