Organic Chemistry - Study Mode

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[#176] Study the following statements. 1. The gas supplied in cylinders for cooking is mixture of C 3 H 8 and C 4 H 10 . 2. The thermal decomposition of alkanes is known as cracking. 3. Paraffin wax is saturated hydrocarbons. Which of the statements given above are correct?

(A) 1 and 2

(B) 1 and 3

(C) 2 and 3

(D) 1, 2 and 3

Correct Answer

(D) 1, 2 and 3

[#177] Consider the following statements. 1. The simplest hydrocarbon is methane (CH 4 ). 2. Hydrocarbons support life directly as carbohydrates, proteins, nucleic acids 3. Benzene is unsaturated cyclic hydrocarbon. Which of the statements given above are correct?

(A) 1 and 2

(B) 1 and 3

(C) 2 and 3

(D) 1, 2 and 3

Correct Answer

(D) 1, 2 and 3

[#178] . . . . . . . . the compound has a ring-carbon chain structure.

(A) methane

(B) propane

(C) benzene

(D) butane

Correct Answer

(C) benzene

[#179] The molecular formulas of methane, ethane and butane are CH 4 , C 2 H 6 and C 4 H 10 , respectively. What would be their empirical formulas respectively?

(A) CH 4 , CH 3 and C 2 H 5

(B) CH 4 , C 6 H 6 and C 2 H 2

(C) CH 4 , C 2 H 6 and C 4 H 10

(D) C 4 H, 2CH 3 and 2C 2 H 5

Correct Answer

(A) CH 4 , CH 3 and C 2 H 5

[#180] The gas produced through the pouring water on the calcium carbide is

(A) methane

(B) ethane

(C) ethylene

(D) acetylene

Correct Answer

(D) acetylene