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

Give the options for reducing green house gases by use of fuels better than fossil fuels.

Explain how promoting ‘afforestation’ and checking ‘deforestation’ reduces the release of greenhouse gases.

The greenhouse gas, which on combustion produces another greenhouse gas.

A renewable source of energy which causes minimum or no pollution.

Give reason for the following:

In the absence of greenhouse gases, the surface temperature of the earth is maintained.

Name or state the following:

A green house gas which contains carbon and hydrogen only.

The diagram represents the green house effect.

State why the effect is called ‘global warming’.

The diagram represents the greenhouse effect.

Name a process which (a) releases (b) absorbs – greenhouse gas – CO₂.

The diagram represents the greenhouse effect.

Which of the following – biofertilizers or nitrogenous fertilizers reduces the greenhouse gas – CO₂? Explain.

What test would you do to find out whether a given solution is saturated or unsaturated.

Differentiate between unsaturated, saturated & supersaturated solutions.

How would you convert a saturated solution to an unsaturated solution and vice versa?

Define: Proton

Define: Electron

Define: Neutron

Explain in brief the experimental proof which led to the discovery of –

Protons

Select the correct word from the words in option to complete the sentence:

A saturated solution can be converted to an unsaturated solution by ____ the amount of the solvent.

Represent a proton ‘p’ in term of its symbol showing the subscript and superscript value.

Represent an electron ‘e’ in term of its symbol showing the subscript and superscript value.

Represent a neutron ‘n’ in term of its symbol showing the subscript and superscript value.