A. Sb
B. N
C. As
D. P
✅ The correct answer is option B.
Chemistry MCQs
Unit of the rate of reaction is
A. Moles dm-3 sec-1
B. Moles dm-3
C. Moles sec-1
D. Mol-1 dm3 sec-1
✅ The correct answer is option A.
Molozonide is unstable and changes into ozonide on
A. Reduction
B. Oxidation
C. Hydrolysis
D. Rearrangement
✅ The correct answer is option D.
SO3 is not absorbed in water directly because
A. The reaction is exothermic
B. It is insoluble in water
C. Dilute acid is produced
D. All of above
✅ The correct answer is option A.
Dehalogenation of ethyl tetrahalide will give
A. Ethene
B. Ethyne
C. Ethyl halide
D. All of the above are possible
✅ The correct answer is option B.
Phosphene gas will be produced if phosphorous acid is subjected to
A. Oxidation
B. Reduction
C. Decomposition
D. Both B & C
✅ The correct answer is option D.
All of the following were theorized by Bohr in his description of the atom except
A. The angular momentum of electrons in multiples of h/2?
B. Electrons revolve in discrete circular orbits
C. The energy of each electron is directly proportional to n2
D. Electrons radiate energy continuously in a given orbit
✅ The correct answer is option D.
Which of the following will give phosphoric acid one reaction with water
A. PCI5
B. P2O3
C. P2O5
D. All of the above
✅ The correct answer is option D.
The letters sp d and f are used to represent which quantum numbers
A. Principal
B. Azimuthal
C. Magnetic
D. Spin
✅ The correct answer is option B.
Which one of following is not a property of pure quartz?
A. Coloured solid
B. Brittle
C. Hard
D. All of above
✅ The correct answer is option A.