Which of the following corresponds to the electronic configuration 1s², 2s²,2p⁶,3s²
Options
(a) Magnesium (b) Helium (c) Argon (d) Sodium
Correct Answer:
Magnesium
Explanation:
No explanation available. Be the first to write […]
Bleaching powder is obtained by treating Cl₂ with
Options
(a) CaOCl₂ (b) CaO (c) Ca(OH)₂ solution (d) CaCO₃
Correct Answer:
Ca(OH)₂ solution
Explanation:
No explanation available. Be the first to write the explanation […]
Gas A is bubbled through slacked lime, a white precipitate is formed. On prolonged bubbling the precipitate is dissolved. On heating the resultant solution, the white precipitate reappeares with evolution of gas B. The gases […]
The number of hydroxide ions produced by one molecule of sodium carbonate (Na₂CO₃) on hydrolysis is
Options
(a) 3 (b) 1 (c) 4 (d) 2
Correct Answer:
2
Explanation:
No explanation available. Be […]
Which of the following is not soluble in NaOH
Options
(a) Fe(OH)₃ (b) Zn(OH)₂ (c) Al(OH)₃ (d) Sn(OH)₂
Correct Answer:
Fe(OH)₃
Explanation:
No explanation available. Be the first to write the explanation for […]
Plaster of paris is used
Options
(a) in surgery and dentistry (b) as a white wash (c) as a constituent of toothpaste (d) for the preparation of RCC
Correct Answer:
in surgery and […]
Magnesium does not decompose in
Options
(a) steam (b) hot water (c) cold water (d) semi-hot water
Correct Answer:
cold water
Explanation:
Magnesium has a very slight reaction with cold water. The reaction soon […]
K₂Cr₂O₇ on heating with aqueous NaOH gives
Options
(a) CrO₄²⁻ (b) Cr(OH)₃ (c) Cr₂O₇²⁻ (d) Cr(OH)₂
Correct Answer:
CrO₄²⁻
Explanation:
No explanation available. Be the first to write the explanation for this question […]
Bleaching powder is obtained by treating chloride with
Options
(a) CaO (b) CaSO₄ (c) CaCO₃ (d) Ca(OH)₂
Correct Answer:
Ca(OH)₂
Explanation:
No explanation available. Be the first to write the explanation for this […]
Grignard reagent is prepared by the reaction between
Options
(a) zinc and alkyne (b) magnesium and alkane (c) zinc and alkyl halide (d) magnesium and alkyl halide
Correct Answer:
magnesium and alkyl halide
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