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0.037g of an alcohol, R-OH was added to C₂H₅Mgl and the has evolved measured 11.2cc at STP. The molecular mass of R-OH will be
Options
(a) 47
(b) 79
(c) 77
(d) 74
Correct Answer:
74
Explanation:
R—OH + C₂H₅Mgl → C₂H₆ + RMgl
0.037 11.2 cc
11.2 cc gas evolved by alcohol= 0.037 g
22400 cc gas will be evolved by alcohol
= 0.037/11.2 x 22400
= 74 g
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- Reaction of solid KMnO₄ ith conc.H₂SO₄ produces manganese heptoxide (Mn₂O₇) in
- The bad smelling substance, formed by the action of alcoholic caustic potash
- The volume of 2.8g of carbon monoxide at 27⁰C and 0.821 atm pressure is
- The equivalent weight of H₃PO₂, when it disproportionates into PH₃ and H₃PO₃ is
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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