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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

Which of the following set has all species isoelectronic__________________?
A F – Cl – Br
B Li+1 – Na+1 – K+1
C F – Ne – Na+
D H+ – H- – H
Correct Answer: F – Ne – Na+
The volume occupied by 1.4g CO at S.T.P is___________________?
A 22.4 dm3
B 2.24 dm3
C 1.12 cm3
D 1.12 dm3
Correct Answer: 1.12 dm3
The compound which is added to leaded gasoline to save engine from lead oxide and lead sulphate deposits is__________________?
A Ethylene iodide
B Ethylene bromide
C Ethylene chloride
D Ethylene fluoride
Correct Answer: Ethylene bromide
Which of the following elements conduct electricity and also melts below 100°C ?
A Aluminium
B Sodium
C Carbon
D Sulphur
Correct Answer: Sodium
Acid present in acid rain may be_________________?
A H2SO4
B HNO3
C both A and B
D none of the above
Correct Answer: both A and B
The unit of the rate constant (k) is same as that of rate of reaction________________?
A First order reaction
B Second order reaction
C Zero order reaction
D Third order reaction
Correct Answer: Zero order reaction
Which of the following elements react with steam to produce H2 gas?
A Pd
B Ni
C Sn
D All of the above
Correct Answer: All of the above
Consider the following redox reaction. Zn+dil HNO3? Zn (NO3)2 + N2O + H2O The coefficient number of HNO3 in the equation is__________________?
A 6
B 8
C 10
D 4
Correct Answer: 10
A solution can be both____________________?
A dilute and concentrated
B dilute and saturated
C saturated and unsaturated
D saturated and super saturated
Correct Answer: dilute and concentrated
The unit of molality is__________________?
A moles dm-3
B moles kg-1
C gram dm-3
D none
Correct Answer: moles kg-1
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