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

General Science

jkssb chemistry set 1 mcqs

Download PDF

Topics

jkssb physics set 1 mcqs jkssb chemistry set 1 mcqs jkssb biology set 1 mcqs

Practice Questions

504 Total
Question 201 Discuss
Ask a Friend

Which compound is used to neutralise fatty acids and convert them into salts in a process called saponification?

A
Sodium fluoride
B
Sodium acetate
C
Sodium chlorate
D
Sodium hydroxide

Answer & Explanation

Correct Option: D

Sodium hydroxide (commonly called lye) is the strong alkaline base standardly used to hydrolyze fatty acids in the soap-making process known as saponification.
Question 202 Discuss
Ask a Friend

Boron is the only metalloid of which group of the periodic table?

A
Group 1
B
Group 2
C
Group 17
D
Group 13

Answer & Explanation

Correct Option: D

Boron is located at the very top of Group 13 (the boron family) on the periodic table and is the sole element in that vertical column classified as a metalloid.
Question 203 Discuss
Ask a Friend

Which element is a transition metal in Group 9 of the periodic table?

A
Cobalt (Co)
B
Copper (Cu)
C
Nickel (Ni)
D
Iron (Fe)

Answer & Explanation

Correct Option: A

Cobalt is a recognized transition metal located exactly in Group 9 of the periodic table, flanked by iron in Group 8 and nickel in Group 10.
Question 204 Discuss
Ask a Friend

Which of the following elements has the highest electron affinity in the periodic table?

A
fluorine
B
chlorine
C
oxygen
D
iodine

Answer & Explanation

Correct Option: B

Chlorine has the highest electron affinity because Fluorine's small size leads to inter-electronic repulsions that hinder incoming electrons.
Question 205 Discuss
Ask a Friend

In a redox reaction, the substance that undergoes a decrease in its oxidation number is known as the:

A
reducing agent
B
oxidizing agent
C
catalyst
D
auto-catalyst

Answer & Explanation

Correct Option: B

The oxidizing agent gains electrons, causing its own oxidation number to decrease (reduction).
Question 206 Discuss
Ask a Friend

Which gas is primarily responsible for the 'puffed up' appearance of bread or cake during baking?

A
oxygen
B
nitrogen
C
carbon dioxide
D
methane

Answer & Explanation

Correct Option: C

Sodium bicarbonate reacts with acidic components to release CO2 gas, which expands and creates air pockets.
Question 207 Discuss
Ask a Friend

The aqueous solution of which of the following salts will turn blue litmus red?

A
sodium chloride
B
potassium nitrate
C
ammonium chloride
D
sodium acetate

Answer & Explanation

Correct Option: C

Ammonium chloride is a salt of a strong acid (HCl) and a weak base (NH4OH), making its aqueous solution acidic.
Question 208 Discuss
Ask a Friend

Which principle states that no two electrons in an atom can have the same set of four quantum numbers?

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

Answer & Explanation

Correct Option: C

Pauli's Exclusion Principle ensures that every electron in an atom has a unique quantum identity.
Question 209 Discuss
Ask a Friend

The process of removing heavier impurities from ore using a stream of water is called:

A
froth flotation
B
magnetic separation
C
hydraulic washing
D
leaching

Answer & Explanation

Correct Option: C

Hydraulic washing is based on the difference in specific gravities of the ore and the gangue particles.
Question 210 Discuss
Ask a Friend

Which of the following is an example of a coordinate covalent bond?

A
h2
B
nacl
C
nh4+
D
ch4

Answer & Explanation

Correct Option: C

In the ammonium ion, the lone pair from Nitrogen is donated to an H+ ion to form a coordinate bond.
Previous Next