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Chemistry 1488 MCQs [All-Courses]

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oost your exam preparation with our Chemistry MCQs designed for PPSC, FPSC, NTS, OTS, PTS, AJKPSC, BPSC, KPPSC, PMS, CSS, and all competitive exams.
Our content covers Basic Chemistry, Atomic Structure, Periodic Table, Chemical Reactions, Acids & Bases, Organic Chemistry, and everyday chemical concepts.

All Topics  1488

The most electronegative element among the following is_________________?
A Sb
B N
C As
D P
Correct Answer: N
Unit of rate of reaction is_________________?
A Moles dm-3 sec-1
B Moles dm-3
C Moles sec-1
D Mol-1 dm3 sec-1
Correct Answer: Moles dm-3 sec-1
The volume strength of 1.5 N H2O2 solution is_______?
A 4.8
B 5.2
C 8.8
D 8.4
Correct Answer: 8.4
Which one of the followings possesses melting point below 0°C?
A Nitrogen
B Phosphorus
C Carbon
D Bismuth
Correct Answer: Nitrogen
Spontaneous reactions are_______________?
A Moderate
B Slow
C Fast
D not natural
Correct Answer: Fast
A 10 volume solution of H2O2 means_______?
A 10 grams of H2O2 solution liberate 10 mL of O2 at STO
B 10 gram equivalents of H2O2 liberates 10 mL of O2 at STP
C 10 litres of H2O2 liberates 19 mL of O2 at STP
D 1mL of solution of H2O2 liberates 10 mL of O2 at STP
Correct Answer: 1mL of solution of H2O2 liberates 10 mL of O2 at STP
When sulphuric acid is treated with ethanol sulphuric acid behaves like________________?
A an acid
B a dehydrating agent
C an oxidizing agent
D as sulphonating agent
Correct Answer: a dehydrating agent
The value of activation energy is primarily determined by_______________?
A Temperature
B Effective collision
C Concentration of reactants
D Chemical nature of reactants and products
Correct Answer: Effective collision
Electronic Configuration of Calcium (Ca) atom may be written as________?
A Ne, 4p2
B Ar, 4s2
C Ne, 4s2
D Kr,4p2
Correct Answer: Ar, 4s2
Arsenic oxides are removed by passing through_________________?
A Ferric hydroxide
B Sodium hydroxide
C Calcium hydroxide
D Aluminium hydroxide
Correct Answer: Ferric hydroxide
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