Question 1 :
Purification of water is carried out to remove - dissolved gasses e.g. carbon dioxide and dissolved minerals like magnesium salts.

Question 3 :
Click and choose the correct option.<br>Matter is defined as anything that occupies space and has

Question 4 :
Click and choose the correct option.<br>The process of conversion of a liquid into its solid state on cooling is called

Question 6 :
Salts of iron, aluminium and chromium are used to make dyes.

Question 7 :
Air is a mixture and not a compound since the components of air cannot be separated by physical methods.

Question 8 :
Sodium carbonate and sodium sulphate do not form an aqueous solution.

Question 9 :
Carbon dioxide, water vapour and energy in the form of heat are evolved during respiration.

Question 11 :
Click and choose the correct option.<br>_________ is the purest form of natural water since it is formed by the condensation of water vapour.

Question 13 :
All solids, on heating, first change to the liquid and then to the gaseous state always.

Question 16 :
Match the following scientists in column A with their discoveries or contributions in column B.<table><tr><th>Column A</th><th>Column B</th></tr><tr><td>(a) Marie Curie </td><td>(i) Safety Lamp</td></tr><tr><td>(b) John dalton</td><td>(ii) Helium</td></tr> <tr><td>(c) William Ramsey</td><td>(iii) Nobel Prize Winner(two times)</td></tr> <tr><td>(d) Sir Humphry Davy </td><td>(iv) Atomic theory </td></tr></table>

Question 20 :
Click and choose the correct option.<br>The intermolecular force of attraction between the molecules of the same kind is called

Question 21 :
Name the following:<br />A long glass tube with a broad inlet at the top, which allows entry of the reactants into the round bottom flask, during laboratory preparations of gases.

Question 22 :
Which one of the following is most likely to be corroded?

Question 24 :
The mesosphere in the atmosphere contains most of the air, fit for respiration.

Question 26 :
Match the following :<table><tr><th>Column A</th><th>Column B</th></tr><tr><td>(a) Solids </td><td>(i) Can flow in all directions</td></tr><tr><td>(b) Sublimation</td><td>(ii) The temperature at which a liquid changes into its gaseous state</td></tr><tr><td>(c) Boiling point</td><td>(iii) Can have any number of free surfaces</td></tr> <tr><td>(d) Gases </td><td>(iv) Gaps between particles</td></tr><tr><td>(e) Intermolecular space</td><td>(v) Changes of state from solid to gas </td></tr></table>

Question 27 :
To pass a gas from one vessel to another, you will use

Question 29 :
Click and choose the correct option.<br>Air acts as the medium through which sound travels.

Question 30 :
Identify the apparatus in the following figure<br /><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/ICSE%20-%20Class%206/5fd9fbb08ed3754af73d4c1b" />

Question 31 :
Click and choose the correct answer.<br>Which of the following states of matter has a definite shape and a definite volume?

Question 32 :
Click and choose the correct option.<br>The substances that pollute water are called _________.

Question 33 :
Click and choose the correct option.<br>Sugar powder _________ faster in water than crystals of sugar.

Question 34 :
Click and choose the correct answer.<br>Which of the following generally increases the solubility of solutes in water?

Question 38 :
Click and choose the correct option.<br>The full form of LPG is

Question 42 :
Identify the apparatus in the following figure<br /><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/ICSE%20-%20Class%206/5fd9fbb18ed3754af73d4c1c" />

Question 43 :
A substance which absorbs moisture and keeps the skin dry and free from rashes

Question 44 :
Click and choose the correct option.<br>The burning of candle is a

Question 45 :
Distillation is a good method for purifying water for town supply.

Question 47 :
Identify the apparatus in the following figure<br /><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/ICSE%20-%20Class%206/5fd9fbb48ed3754af73d4c23" />