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 […]
Gadolinium belongs to 4f series. Its atomic number is 64. Which of the following is the correct electronic configuration of gadolinium
Options
(a) [Xe] 4f⁹5s¹ (b) [Xe]4f⁷5d¹6s² (c) [Xe]4f⁶5d²6s² (d) [Xe]4f⁸6d²
Correct Answer: […]
Decreasing order of stability of O₂ , O₂⁻ , O₂⁺ and O₂²⁻ is
Options
(a) O₂²⁻ > O₂⁻ > O₂ >O₂⁺ (b) O₂> O₂⁺ > O₂²⁻ > O₂⁻ (c) O₂⁻ > O₂²⁻ > […]
Caprolactam is used for the manufacture of
Options
(a) teflon (b) terylene (c) nylon 6,6 (d) nylon 6.
Correct Answer:
nylon 6.
Explanation:
No explanation available. Be the first to write the explanation […]
Assuming complete ionisation same moles of which of the following compounds will require the least amount of acidified KMnO₄ for complete oxidation
Options
(a) FeSO₃ (b) FeC₂O₄ (c) Fe(NO₂)₂ (d) FeSO₄
Correct Answer: […]
2017-2025 Copyright Doctor Dreams Training Academy - About Us - Privacy Policy - Terms & Conditions - Contact Us - Refund Policy