(English Medium) ICSE Class 9 - CISCE Question Bank Solutions for Chemistry

Give the properties of water responsible for controlling the temperature of our body.

Density of water varies with temperature. What are its consequences?

Give three factors which affect the solubility of a solid solute in a solvent.

What is the effect of temperature on solubility of KNO₃ and CaSO₄ in water?

Solubility of NaCl at 40^oC is 36.5 g. What is meant by this statement?

What is the effect of pressure on solubility of gases? Explain with an example.

Explain why:

Effervescence is seen on opening a bottle of soda water.

Normally, solubility of crystalline solid increases with temperature. Does it increase uniformly in all cases? Name a substance whose solubility:

Increases rapidly with temperature

Normally, solubility of crystalline solid increases with temperature. Does it increase uniformly in all cases? Name a substance whose solubility:

Increases gradually with temperature.

Normally, solubility of crystalline solid increases with temperature. Does it increase uniformly in all cases? Name a substance whose solubility:

Increases slightly with temperature.

Normally, solubility of crystalline solid increases with temperature. Does it increase uniformly in all cases? Name a substance whose solubility:

Initially increases then decreases with rise in temperature.

What is the use of solubility of oxygen and carbon dioxide in water?

The position of elements A, B, C, D and E in the periodic table are shown below:

State which is metals, non-metals, and noble gas in this table.

The position of elements A, B, C, D and E in the periodic table are shown below:

State which is most reactive (i) metal (ii) non-metal

The position of elements A, B, C, D and E in the periodic table are shown below:

Which type of ion will be formed by elements A, B, and C.

 The position of elements A, B, C, D and E in the periodic table are shown below:

Which is larger in size (i) D or E (ii) B or C

Write the electronic configuration of element ₁₇T³⁵.

1. What is the group number of T?
2. What is the period number of T?
3. How many valence electrons are there in an atom of T?
4. What is the valency of T?
5. Is it a metal or non-metal?
6. State number of protons and neutrons in T.

Element P has atomic number 19. To which group and period, does P belong? Is it a metal or a non-metal? Why?

An element belongs to the third period and Group IIIA (13) of the periodic table. State: the number of valence electrons,

An element belongs to the third period and Group IIIA (13) of the periodic table. State: the valency,