MEDIUM
9th ICSE
IMPORTANT
Earn 100

Explain why a hot saturated solution of potassium nitrate forms crystals as it cools.

Important Questions on Water

MEDIUM
9th ICSE
IMPORTANT
S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 3 - Water>Questions>Q 4
What do you understand by the following term? Give one example.
A deliquescent substance
EASY
9th ICSE
IMPORTANT
S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 3 - Water>Questions>Q 4
What do you understand by water of crystallisation? Give one example.
MEDIUM
9th ICSE
IMPORTANT
S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 3 - Water>Questions>Q 5
From the list of metals given below write down the name of the one which is least reactive with cold water but which will decompose hot water. Give the equation for the reaction. Calcium Magnesium, Sodium.
EASY
9th ICSE
IMPORTANT
S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 3 - Water>Questions>Q 6
What is meant by a saturated solution?
MEDIUM
9th ICSE
IMPORTANT
S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 3 - Water>Questions>Q 6
The solubility of KNO3, at 50°C is 86 g. What does this statement mean?
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 FeSO4.7H2O. 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.