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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

Acid present in acid rain may be__________________?

A H2SO4
B HNO3
C both A and B
D none
Correct Answer: both A and B

When enthalpy of reactants is higher than product then reaction will be_________________?

A endothermic
B spontaneous
C non-spontaneous
D exothermic
Correct Answer: exothermic

Hypochlorous acid is used for disinfecting the water it reacts with the dissolved ammonia producing___________________?

A NH2Cl
B NHCI2
C NCI2
D all of the above
Correct Answer: all of the above

Residence time of methane in the atmosphere is___________________?

A 3 – 7 days
B 2 -3 days
C 3 – 7 years
D 2 – 3 years
Correct Answer: 3 – 7 years

Three elements needed for the healthy growth of plants are_________________?

A N P K
B N K C
C N S P
D N Ca P
Correct Answer: N P K

Which of the following is a macro nutrient ?

A boron
B iron
C copper
D carbon
Correct Answer: carbon

Ka<10-3 means______________?

A Very strong base
B Very weak acid
C Very strong acid
D Very strong salt
Correct Answer: Very weak acid

Idea of pH and pOH was put forward by________________?

A Gibbs
B Einstein
C Sorenson
D Chadwick
Correct Answer: Sorenson

When the value of Kc is very small then_______________________?

A reaction is at start
B product conc. Is maximum
C reactant conc. Is minimum
D reaction is completed
Correct Answer: product conc. Is maximum

In case of gases Kc is replaced by_______________?

A Ka
B Kb
C Kp
D K
Correct Answer: Kp
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