Ozone is formed in the upper atmosphere from oxygen by the action of
Options
(a) ultraviolet rays (b) cosmic rays (c) free radicals (d) nitrogen oxides
Correct Answer:
ultraviolet rays
Explanation:
No explanation […]
Oxidation number of iodine in IO₃⁻, IO₄⁻, KI and I₂ respectively are
Options
(a) -1, -1, 0 , 1 (b) 3, 5, 7, 0 (c) 5, 7, -1, 0 (d) -1, -5, -1, […]
The common oxidation state shown by lanthanides in their compounds is
Options
(a) ⁺1 (b) ⁺3 (c) ⁺5 (d) ⁺6
Correct Answer:
⁺3
Explanation:
No explanation available. Be the first to write the […]
If P is pressure and D is density of a gas, then P and D are related as
Options
(a) P ∝ D (b) P ∝ (1/D) (c) P ∝ D² (d) P […]
Gem-dihalides are hydrolysed with either acid or basic catalysts to give
Options
(a) aldehydes or ketones (b) halohydrins (c) carboxylic acids (d) gem-diols
Correct Answer:
aldehydes or ketones
Explanation:
No explanation available. Be […]
What is the general outer electronic configuration of the coinage metals?
Options
(a) ns², np⁶ (b) (n-1)d¹⁰, ns¹ (c) (n-1)d¹⁰, ns² (d) (n-1)d⁹, ns²
Correct Answer:
(n-1)d¹⁰, ns¹
Explanation:
No explanation available. Be […]
The silver salt of a fatty acid on refluxing with an alkyl halide gives an
Options
(a) acid (b) ester (c) ether (d) amine
Correct Answer:
ester
Explanation:
No explanation available. Be the […]
The reaction of which of the following compounds would yield secondary amine
Options
(a) Alkyl nitrile (b) carbylamine (c) primary amine (d) Secondary nitro compound
Correct Answer:
carbylamine
Explanation:
No explanation available. Be […]
The gas which combin with haemoglobin to damage its oxygen carrying capacity is
Options
(a) co (b) CO₂ (c) N₂ (d) O₂
Correct Answer:
co
Explanation:
No explanation available. Be the first to […]
Which of the following is obdained when acetone is treated with bleaching powder
Options
(a) CCl₄ (b) CHCl₃ (c) CH₂Cl₂ (d) CH₃Cl
Correct Answer:
CHCl₃
Explanation:
No explanation available. Be the first to […]
2017 Copyright Doctor Dreams Training Academy