Question

Two substances X and Y combine together to form a product Z which contains both X and Y. Z cannot be broken down into simpler substances by physical means. Which of the following statements about X, Y and Z are correct?(i) Z is a compound.(ii) X and Y are compounds.(iii) X and Y are elements(iv) Z has a fixed proportion​

Answer 1

Answer:

Z is a compound is correct answer

Answer 2

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Two chemical species X and Y combine together to form a product Z which contains both X and Y .

X + Y → Z

X and Y cannot be broken down into simpler substances by simple chemical reactions . Which of the following concerning the species X , Y and Z are correct ?

(i) Z is a compound

(ii) X and Y are compounds

(iii) X and Y are elements

(iv) Z has a fixed composition

• (a) (i) , (ii) and (iii)

• (b) (i) , (ii) and (iv)

• (c) (ii) , (iii) and (iv)

• (d) (i) , (iii) and (iv) ✔️

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(d) (i) , (iii) and (iv)

• Z is a compound because it is formed due to combination of two chemical species X and Y .

• X and Y are elements because they cannot be broken down into simpler substances by simple chemical reactions .

• Z has a fixed composition because it is formed due to combination of X and Y in fixed ratio .

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• Elements

A substance that cannot be broken down into simpler substances by chemical means . An element is composed of atoms that have the same atomic number.

• Compounds

Compounds are chemical substances made up of two or more elements that are chemically bound together in a fixed ratio .