Question

Which of the following is represented by chemical formula?

A. Compounds
B. Elements
C. Mixtures
D. Both A and C
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Answer 1

Answer:

only a

Explanation:

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Answer 2

(A) Compounds are represented by chemical formula.

Explanation:

• In chemistry, we come across many technical term such as compounds, elements, mixture etc.
• They all are different.

(A) Compounds:

• When two or more element of same type or different type combine together through bonding, it gives compound.
• For example, water is a compound and its chemical formula is $H_{2}O$.
• Thus, option (A) is correct.

(B) Elements:

• When atoms of same type is present in an substance, it is called as element.

• Elements are represented by symbols, not by chemical formula.
• For example, iron is a element and its represented by symbol 'Fe'.
• Thus, option (B) is incorrect.

(C) Mixtures:

• When any two substance which are either chemical or non-chemical in nature it gives mixture.
• They don't have specific formula.
• Thus, option (C) is incorrect.

(D) Both A and C

• The options given in 'A' and 'C' are Compound and Mixtures respectively.
• Compound can be represented by chemical formula, but mixtures cannot be represented by chemical formula.
• Thus, option (D) is incorrect.

Final answer:

(A) Compound is represented by chemical formula.