Question

two chemical species X and Y combine together to form product P
X+Y=P
X and Y cannot be broken down into simpler substances by simple chemical reactions

Answer 1

So....

X and Y cannot be broken down into simpler substances by simple chemical reactions . Then they are pure substances . means they are any pure elements.

Then the reaction is,

C + O2 -----> CO2.

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Answer 2

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

X + Y → P

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

(i) P is a compound

(ii) X and Y are compounds

(iii) X and Y are elements

(iv) P 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)

• P 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 .

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

$\green{ \large \underline{ \mathbb{\underline{KNOW\:MORE: }}}}$

• 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 .