Question

5. Two compounds A and B have
same percentage composition. The
compounds A and B
(A) are identical
(B) are isomers
(C) are neither identical nor
isomers
(D) All the three are correct.​

Answer 1

Answer:

D) all the three are correct

Explanation:

Converse of law of definite proportion is not true. For example, butane and is obutane have same percentage composition (Choice B), acetylene, C2H2 and benzene, C6H6 have same percentage composition. As such choice (D) is correct

Answer 2

Answer:

(D) All the three are correct.

Explanation:

Converse of law of definite proportion is not true. For example, butane and isobutane have same percentage composition (Choice B), acetylene, C2H2 and benzene, C6H6 have same percentage composition.

Isomers

Chemical compounds that have identical chemical formulae but differ in properties and the arrangement of atoms in the molecule are called as isomers. Therefore, the compounds that exhibit isomerism are known as isomers. The word “isomer” is derived from the Greek words “isos” and “meros”, which mean “equal parts”.

Types of Isomers

There are two general types of isomers which are as follows:

• Constitutional isomers are molecules of different connectivity—analogous to simple bracelets in which the order of red and green beads is different.
• The second type is stereoisomers. In stereoisomers the connectivity is the same, but the parts are oriented differently in space.

So, option (D) is correct answer for the above question.

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