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

Give balanced equation for the following conversion:

Zinc to sodium zincate – using an alkali.

Give balanced equation for the following conversion:

Zinc to sodium zincate – using an alkali.

Name or state the following:

The law which states that pressure remaining constant the volume of a given mass of dry gas is directly proportional to its absolute [Kelvin] temperature.

Fill in the blank with the correct word, from the words in option:

All the temperature on the kelvin scale are in ____ figures.

Express Kelvin Zero in °C

At 0°C and 760 mm Hg pressure, a gas occupies a volume of 10Q cm³. The Kelvin temperature (Absolute temperature) of the gas is increased by one-fifth while the pressure is increased one and a half times. Calculate the final volume of the gas. [80 cc.]

Give a simple diagram to show the arrangement of the electrons in an atom of sulphur.

Write down the electronic configuration of the following 

1. ²⁷₁₃X,
2. ³⁵₁₇Y.

Write down the number of electrons in X and neutrons in Y and the formula of the compound formed by X and Y.[XY₃]

What is the relation between the number of protons and the number of electrons in an atom?

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

Electrons

What are the noble gases?

Give a reason why noble gases have a stable electronic configuration.

Complete and balance the equation:

[Laboratory method]

By action of dilute acid on zinc

Zinc - Zn + 2HCl → _____ + _____ [g]

Complete and balance the equation:

[Laboratory method]

By action of dilute acid on zinc

Zinc - Zn + 2HCl → _____ + _____ [g]

Differentiate between the following term:

Electron and proton

Give a balanced equation for the following conversions sodium plumbite from lead.

Give a balanced equation for the following conversions sodium plumbite from lead.

Give a balanced equation for the following conversions sodium aluminate from aluminium.

Give a balanced equation for the following conversions sodium aluminate from aluminium.

In the laboratory preparation of hydrogen from zinc and dil. acid. Give a reason for the following:

The complete apparatus is air-tight.