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 261 Discuss
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The reaction of an acid with a base to form salt and water is called:

A
hydrogenation
B
neutralization
C
fermentation
D
saponification

Answer & Explanation

Correct Option: B

Neutralization involves the combination of H+ and OH- ions to form water.
Question 262 Discuss
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Which of the following is a covalent solid?

A
solid co2
B
ice
C
diamond
D
nacl

Answer & Explanation

Correct Option: C

Diamond and Silicon carbide are network covalent solids; Ice and Dry ice are molecular solids.
Question 263 Discuss
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The concept of 'Half-life' in radioactivity depends on:

A
temperature
B
pressure
C
amount of substance
D
nature of the isotope

Answer & Explanation

Correct Option: D

Radioactive decay is a first-order nuclear process and its half-life is a constant characteristic of the isotope.
Question 264 Discuss
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Which of the following is the most stable form of Carbon?

A
diamond
B
graphite
C
fullerene
D
coal

Answer & Explanation

Correct Option: B

Graphite is thermodynamically more stable than diamond at standard temperature and pressure.
Question 265 Discuss
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Which chemical is used to preserve biological specimens in laboratories?

A
acetic acid
B
formalin
C
acetone
D
chloroform

Answer & Explanation

Correct Option: B

Formalin is a 40% aqueous solution of formaldehyde used for preservation and sterilization.
Question 266 Discuss
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An orbital can hold a maximum of two electrons. This is according to:

A
hunds rule
B
aufbau principle
C
pauli exclusion principle
D
uncertainty principle

Answer & Explanation

Correct Option: C

Pauli's principle limits each orbital to two electrons with opposite spins.
Question 267 Discuss
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Which of the following acids is present in 'Stinging Nettle' leaves?

A
formic acid
B
oxalic acid
C
methanoic acid
D
both a and c

Answer & Explanation

Correct Option: D

Formic acid and Methanoic acid are the same compound; it causes the stinging sensation.
Question 268 Discuss
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The major product of the 'Saponification' process is:

A
detergent
B
soap
C
alcohol
D
ester

Answer & Explanation

Correct Option: B

Saponification is the alkaline hydrolysis of fats/oils to produce soap (salts of fatty acids).
Question 269 Discuss
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Which element has the lowest ionization enthalpy in the periodic table?

A
helium
B
fluorine
C
cesium
D
francium

Answer & Explanation

Correct Option: C

Cesium has the largest atomic radius and lowest ionization energy among stable elements.
Question 270 Discuss
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The process of 'Fractional Distillation' is based on the difference in:

A
melting points
B
solubility
C
boiling points
D
density

Answer & Explanation

Correct Option: C

Fractional distillation separates components of a mixture based on their different boiling points.
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