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: […]
A gas such as carbon monoxide would be most likely to obey the ideal gas law at
Options
(a) low temperatures and high pressures (b) high temperatures and high pressures (c) low temperatures and […]
Bithional is generally added to the soaps as an additive to function as a
Options
(a) Dryer (b) Buffering agent (c) Antiseptic (d) Softner
Correct Answer:
Antiseptic
Explanation:
No explanation available. Be […]
Biodegradable polymer which can be produced from glycine and aminocapronic acid is
Options
(a) PHBV (b) Buna-N (c) Nylon6,6 (d) Nylon 2-nylon 6
Correct Answer:
Nylon 2-nylon 6
Explanation:
H₂N–CH₂–COOH (Glycine)+H₂N–(CH₂)₅–COOH (Aminocapric acid) […]
The electrolytic reduction of nitrobenzene in strongly acidic medium produces
Options
(a) Azoxybenzene (b) Azobenzene (c) Aniline (d) p-Aminophenol
Correct Answer:
p-Aminophenol
Explanation:
No explanation available. Be the first to write the explanation […]
Treatment of cyclopentanone with methyl lithium gives which of the following species
Options
(a) Cyclopentnonyl cation (b) Cyclopentanonyl radical (c) Cyclopentanonyl biradical (d) Cyclopentanonyl anion
Correct Answer:
Cyclopentanonyl anion
Explanation:
No explanation available. […]
An organic compound ‘X’ having molecular formula C₅H₁₀O yields phenyl hydrozone and gives negative response to the Iodoform test and Tollen’s test.It produces n-pentane on reduction.’X’ could be
Options
(a) 2-pentanone (b) 3-pentanone […]
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