The solubility of ${KNO}_{3}$ , at $50 ° C$ is $86 g$ . What does this statement mean?

Important Questions on Water

MEDIUM

9th ICSE

IMPORTANT

S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 3 - Water>Questions>Q 6

The green ferrous sulphate crystals are said to be hydrated having the formula

{FeSO}_{4} . 7 H_{2} O

. What do you mean by the term ‘hydrated’?

HARD

9th ICSE

IMPORTANT

S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 3 - Water>Questions>Q 6

Hydrated salts, when heated in a test tube give drops of a liquid on the upper part of the test tube. How will you prove that this liquid is water?

EASY

9th ICSE

IMPORTANT

S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 3 - Water>Questions>Q 7

When a piece of the calcium is dropped into a beaker of cold water, a vigorous reaction takes place and the calcium gradually disappears and a white suspension is formed.

Write down the equation for this reaction.

MEDIUM

9th ICSE

IMPORTANT

S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 3 - Water>Questions>Q 7

When a piece of the calcium is dropped into a beaker of cold water, a vigorous reaction takes place and the calcium gradually disappears and a white suspension is formed.
Why does the solution become cloudy?

EASY

9th ICSE

IMPORTANT

S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 3 - Water>Questions>Q 7

When a piece of the calcium is dropped into a beaker of cold water, a vigorous reaction takes place and the calcium gradually disappears and a white suspension is formed.
On filtering, a clearing solution is obtained. What is the name of this clear solution?

EASY

9th ICSE

IMPORTANT

S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 3 - Water>Questions>Q 7

When a piece of the calcium is dropped into a beaker of cold water, a vigorous reaction takes place and the calcium gradually disappears and a white suspension is formed.
What happens when