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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 one of the following carbonate is water insoluble ?
A Na2CO3
B K2CO3
C (NH4)2CO3
D CaCO3
Correct Answer: CaCO3
The bond length of C=C is___________?
A 1.20A°
B 1.34A°
C 1.54A°
D 1.68A°
Correct Answer: 1.68A°
Which one of the following substances conducts electricity by the movement of ions ?
A Graphite
B Copper
C Molten sodium chloride
D Mercury
Correct Answer: Molten sodium chloride
The bond angle between hybrid orbitals in methane CH3 is___________?
A 115.5°
B 109.5°
C 105. 7°
D 180°
Correct Answer: 109.5°
The ore CaSO4.H2O has the general name_______________?
A Gypsum
B Dolomite
C Calcite
D Plaster of Paris
Correct Answer: Gypsum
The criteria for aromaticity is presence of_________?
A Unsaturations
B Cyclic structure
C Presence of 4nπ electrons
D Presence of 4n+2π electrons
Correct Answer: Presence of 4n+2π electrons
Which of the following sulphates is not soluble in water ?
A Sodium sulphate
B Potassium sulphate
C Zinc sulphate
D Barium sulphate
Correct Answer: Barium sulphate
Chlorine Cl when attached to benzene has________?
A +I and +R effect
B -1 and +R effect
C +1 and -R effect
D -I and -R effect
Correct Answer: -1 and +R effect
Nitrates of which pair of elements give different products on thermal decomposition ?
A Na K
B Mg Ca
C Li Na
D Li Ca
Correct Answer: Li Na
Which one of the following is most acidic?
A Phenol
B P-nitrophenol
C O-nitrophenol
D M-nitrophenol
Correct Answer: P-nitrophenol
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