Question 57 of 83
Q.Which of the following compound has same percentage of Carbon as that of ethylene (C2H4)?
(a) benzene
(b) ethane
(c) propene
(d) ethyne
Puducherry TnboardTamil Nadu HSC First Year (DGE) Board 2019MCQ· 1mImportance★★★★★
69% · 57/83 Questions
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Start your 14-day free trial to unlock the full solution →Propene (C3H6) has the same percentage of carbon (about 85.7%) as ethylene (C2H4), because both share the empirical formula CH2.
First find %C in ethylene, C2H4 (molar mass = 2(12) + 4(1) = 28):
%C = 24/28 × 100 ≈ 85.7%
Now check each option (molar mass, then %C):
- Benzene, C6H6 (78 g/mol): %C = 72/78 × 100 ≈ 92.3% — different.
- Ethane, C2H6 (30 g/mol): %C = 24/30 × 100 = 80.0% — different. …
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