C Write true or false. Correct the false statements.
1. A mixture has a definite set of properties.
The constituents of a mixture can be separated by simple physical means.
Petroleum is a mixture of groups of compounds such as bitumen, diesel and petroleum gas
Sieving is a better method of separating bran and wheat flour than winnowing.
5. Lighter particles are separated from heavier particles in a mixture by winnowing.
6. Common salt sublimes on heating whereas ammonium chloride does not.
We can get water from a mixture of salt and water by evaporation.
7. The in
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7.
Answers
Answer
1. A mixture has a definite set of properties.
Ans:- The given statement is False.
Explanation:- Mixture has an in-definite set of properties it shows the properties of its constituents.
2. The constituents of a mixture can be separated by simple physical means.
Ans:- The given statement is True.
Explanation:- The constituents of a mixture can be separated by simple physical means because the components in mixtures are physically combined.
3. Petroleum is a mixture of groups of compounds such as bitumen, diesel and petroleum gas.
Ans:- The given statement is True.
Explanation:- Petroleum is a mixture of groups of compounds such as bitumen, diesel and petroleum gas and is obtained separately by a method of separation called the fractional distillation.
4.Sieving is a better method of separating bran and wheat flour than winnowing.
Ans:- The given statement is True.
Explanation:- Sieving is a better method of separating bran and wheat flour than winnowing because it is easier to separate light bran from heavier wheat flour.
5. Lighter particles are separated from heavier particles in a mixture by winnowing.
Ans:- The given statement is True.
Explanation:- Lighter particles are separated from heavier particles in a mixture by winnowing with the help of wind.
6. Common salt sublimes on heating whereas ammonium chloride does not.
Ans:- The given statement is False.
Explanation :- Actually ammonium chloride sublimes on heating whereas common salt does not sublimes.
7.We can get water from a mixture of salt and water by evaporation.
Ans:- The given statement is False.
Explanation :- We can get salt from a mixture of salt and water by evaporation , inorder to obtain water we must either condense the evaporated water or distilise the salt solution.