Multiple Choice (2pts each) 1. Which factor is most important in determining the

Question

Multiple Choice (2pts each) 1. Which factor is most important in determining the chemistry of an organic molecule? A) the number of carbon-carbon bonds B) the melting point C) the number of carbon-hydrogen bonds D) the number of branches in the carbon chain E) the functional groups 2. Which of the statements about the behavior of the element carbon in organic molecules is incorrect? A) Carbon can be involved in polar covalent bonds. B) Carbon can form single, double, or triple bonds with other carbon atoms. C) When carbon forms four single bonds, the bond angles are 120 D) Carbon can be involved in nonpolar covalent bonds. E) In addition to other carbon atoms, carbon is likely to form bonds with hydrogen, nitrogen, or oxygen. 3. How many hydrogen atoms are present in a straight-chain alkane with five carbon atoms? A) 12 B) 7 C) 10 D) 9 E) 5

Explanation / Answer

1) A is the answer because the organic chemistry means study of carbon contain compounds

2 ) C is the wrong answer because the carbon and four single bonds( alkanes ) have the bond angle is 109 degrees so 120 degrees is wrong answer

3 ) A is the right answer because the given compound is pentane so we have 12 hydrogen atoms are there

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