Question

Auction (A): Pure substances can be either an element or a compound Reusen (R) : Acompound is a substance composed of two or more different types of elements chemically combined in a fixed proportion a) Boch A and Rare true and R is the corect explanation of A b) Beh A and R are true and R is not the correct explanation of A c) A true but Ris false d) A is false but R is true​

Answer 1

ASSERTION ( A ) :- Pure substances can be either an element or a compound.

REASON ( R ) :- A compound is a substance composed of two or more different types of elements chemically combined in a fixed proportion.

Let's talk about the assertion ( A ).

Yes , It's true that Pure substances can be either an element or a compound.

Lets take an example :- Water ( H_2O) which is a Pure substance and aslo it is a compound as well , as it is a compound of Hydrogen ( 2 atoms ) + oxygen ( 1 atom).

So , The Assertion is True.

Let's talk about the Reason ( R ).

yes, it's true that A compound is a substance composed of two or more different types of elements chemically combined in a fixed proportion.

Example :- NaCl it's a compound and aslo it is composed of two different kind of elements ( Na + Cl).

So , the Reason is True.

The correct Answer is option ( a ) Both A and R are true and R is the correct explanation of A .

Answer 2

Answer:

Correct Question :-

➳ Assertion (A): Pure substances can be either an element or a compound.

➳ Reason (R) : A compound is a substance composed of two or more different types of elements chemically combined in a fixed proportion.

Options :

☯ a) Both A and R are true and R is the corect explanation of A

☯ b) Both A and R are true and R is not the correct explanation of A

☯ c) A true but R is false

☯ d) A is false but R is true

Answer :-

➙ Assertion (A): Pure substances can be either an element or a compound.

➙ Reason (R) : A compound is a substance composed of two or more different types of elements chemically combined in a fixed proportion.

Hence, the correct options is :

a) Both A and R are true and R is the corect explanation of A.

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Pure Substance :

• A pure substance is a form of matter that has a constant composition and properties that are constant throughout the sample.

Impure Substance :

• Impure substances do not have any specific properties.
• The properties of the resulting mixture are a result of the average properties of all its constituents.

Compound Substance :

• A compound is a unique substance that consists of two or more elements combined in fixed proportions.