Question

1) A sample of water Boils at 102°C and has a salty taste.what do you conclude from this?
2} You are given sample of a white powdery substance.It may be the common salt or chalk powder.How you will identity without tasting it?
3} During the purification of water for city supply,the raw water from river/lake is allowed to stand undisturbed in large tanks. What happenes here ?
{There are 3 question }

Answer 1

Explanation:

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1) When a sample of water starts boiling at 102 degree Celsius and has a salty taste, it can be concluded that the sample of water is not pure. The water is considered impure because a sample of pure water holds the capacity to boil at 100 degree Celsius.

2) It may be the common salt or chalk powder. How will you identify it without tasting it ? It is very simple you mix the white chalk powder in water and stir it. If the mixture is mixed in water then it is not chalk powder it is common salt if it settlesat the bottom then it is chalk powder.

3) Sedimentation:

Water pumped from the source (river, lake or dam) is allowed to stand in large tanks, called settling tanks, for a few hours.

hope u get it❤️⚠️

Answer 2

QUESTION...

• 1} A sample of water Boils at 102°C and has a salty taste.what do you conclude from this?

ANSWER...

• When a sample of water starts boiling at 102 degree Celsius and has a salty taste, it can be concluded that the sample of water is not pure. The water is considered impure because a sample of pure water holds the capacity to boil at 100 degree Celsius

QUESTION...

• 2} You are given sample of a white powdery substance.It may be the common salt or chalk powder.How you will identity without tasting it?

ANSWER...

• It is very simple you mix the white chalk powder in water and stir it.If the mixture is mixed in water then it is not chalk powder it is common salt if it settlesat the bottom then it is chalk powder.Chalk powder is little thicker than salt so it remains undissolved.

OR..

• Take a glass of water. Add the powder to the water and stir it well.If it dissolves in water,it is common salt.If it settles down,then it is chalk powder. This is how you can find out

QUESTION...

• 3} During the purification of water for city supply,the raw water from river/lake is allowed to stand undisturbed in large tanks. What happenes here?

ANSWER...

• Sedimentation:
• Sedimentation:Water pumped from the source (river, lake or dam) is allowed to stand in large tanks, called settling tanks, for a few hours

OR..

• heavy insoluble impurities settle down and water is seperated by decantation

HOPE THIS HELPS YOU.. ❤