Reaction of phenol with chloroform in presence of dilute sodium hydroxide finally introduces which one of the following functional group
Options
(a) -COOH (b) -CHCl₂ (c) -CHO (d) -CH₂Cl
Correct Answer:
-CHO
Explanation: […]
Reaction of a carbonyl compound with one of the following reagents involves nucleophilic addition followed by elimination of water.The reagents is
Options
(a) hydrazine in presence of feebly acidic solution (b) hydrocyanic acid […]
On heating which of the following releases CO₂ most easily
Options
(a) Na₂CO₃ (b) MgCO₃ (c) CaCO₃ (d) K₂CO₃
Correct Answer:
MgCO₃
Explanation:
No explanation available. Be the first to write the explanation […]
Number of possible isomers for the complex [Co(en)₂Cl₂]Cl will be (en = ethylenediamine)
Options
(a) 1 (b) 3 (c) 4 (d) 2
Correct Answer:
3
Explanation:
No explanation available. Be the first to […]
Method by which aniline cannot be prepared is
Options
(a) degradation of benzamide with bromine in alkaline solution (b) reduction of nitrobenzene with H₂/Pd in ethanol (c) potassium salt of phthalimide treated with […]
In which of the following pairs, both the species are not isostructural ?
Options
(a) Diamond , Silicon carbide (b) NH₃PH₃ (c) XeF₄,XeO₄ (d) SiCl₄, PCl₄⁺
Correct Answer:
XeF₄,XeO₄
Explanation:
XeF₄,XeO₄, Square planar and […]
In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with
Options
(a) carbon monoxide (b) copper (I) sulphide (c) sulphure dioxide (d) […]
In an SN1 reaction on chiral centres there is
Options
(a) inversion more than retention leading to partial racemisation (b) 100% retention (c) 100%inversion (d) 100% racemisation
Correct Answer:
inversion more than retention […]
If the equilibrium constant for N₂(g) + O₂(g) ⇌ 2NO(g) is K, the equilibrium constant for 1/2 N₂(g) + 1/2 O₂(g) ⇌ NO(g) will be
Options
(a) 1/2 K (b) K (c) K² […]
If Avogadro number NA, is charged from 6.022 ˣ 10²³ mol⁻¹ to 6.022 ˣ 10²⁰ mol⁻¹, this would change
Options
(a) the mass of one mole of carbon (b) the ratio of chemical […]
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