M C Q s D r i v e

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.

Reactivity due to pi-electrons is present in_________________?
A alkane
B alkene
C alkyne
D both B & C
Correct Answer: both B & C
Deuterium reacts with oxygen to form________________?
A Hard water
B Heavy water
C Soft water
D Water gas
Correct Answer: Heavy water
Removal of halogen and hydrogen atom is_________________?
A halogenation
B dehalogenation
C dehydrohalogenation
D hydrohalogenation
Correct Answer: halogenation
The property which increases upto group IV-A then decreases on wards_______________?
A Ionization energy
B Atomic radii
C Melting & boiling points
D Atomic volume
Correct Answer: Melting & boiling points
General formula of alkyne is______________?
A CnH2n + 2
B CnH2n – 2
C CnH2n
D CnH2n + 2
Correct Answer: CnH2n – 2
Which discovery caused a revision in the periodic law as stated by Mendeleev ?
A Location of nucleus by Rutherford
B Atomic number by Moseley
C X-rays by Roentgen
D Natural radioactivity by Henry Bacquerel.
Correct Answer: Atomic number by Moseley
Order of ease of halogenation in alkane is________________?
A I2>Cl2>Br2>F2
B F2>Cl2>I2>Br2
C F2>Cl2>Br2>I2
D Cl2>F2>Br2>I2
Correct Answer: F2>Cl2>Br2>I2
Which one of the following is not a periodic property ?
A Melting point of elements
B Boiling point of elements
C Ionization energy of elements
D Coordination number of ions
Correct Answer: Coordination number of ions
Incomplete oxidation of methane in the limited supply of air forms ?
A CO2 and H2O
B CH3OH
C CO + H2 + C
D CO + H2O + C
Correct Answer: CH3OH
In which of the following pairs are elements belonging to the same group ?
A Boron & Beryllium
B Nitrogen & Phosphorous
C Magnesium & Aluminium
D Gallium & Helium
Correct Answer: Nitrogen & Phosphorous