ICSE ICSE Class 8 - CISCE Question Bank Solutions for Chemistry

The diagram represents an isotope of hydrogen [H]. Answer the following:

Atomic no. = 1
Mass no. = 1

Are isotopes atoms of the same element or different elements.

The diagram represents an isotope of hydrogen [H]. Answer the following:

Atomic no. = 1
Mass no. = 1

Do isotopes have the same atomic number or the same mass number?

The diagram represents an isotope of hydrogen [H]. Answer the following:

Atomic no. = 1
Mass no. = 1

If an isotope of ‘H’ has mass no. = 2, how many electrons does it have.

The diagram represents an isotope of hydrogen [H]. Answer the following:

Atomic no. = 1
Mass no. = 1

If an isotope of ‘H’ has mass no. = 3, how many neutrons does it have.

The diagram represents an isotope of hydrogen [H]. Answer the following:

Atomic no. = 1
Mass no. = 1

Which sub-atomic particles in the 3 isotopes of ‘H’ are the same.

Draw the structure of the following atoms showing the nucleus containing – protons, neutrons and the orbits with the respective electron:

Lithium [At. no. = 3, Mass no. = 7]

Draw the structure of the following atoms showing the nucleus containing – protons, neutrons and the orbits with the respective electron:

Carbon [At. no. = 6, Mass no. = 12]

Draw the structure of the following atoms showing the nucleus containing – protons, neutrons and the orbits with the respective electron:

Silicon [At. no. = 14, Mass no. = 28]

Draw the structure of the following atoms showing the nucleus containing – protons, neutrons and the orbits with the respective electron:

Sodium [At. no. = 11, Mass no. = 23]

Draw the structure of the following atoms showing the nucleus containing – protons, neutrons and the orbits with the respective electron:

Isotopes of hydrogen [1₁H, 2₁H, 3₁H]

Differentiate between:
pure and impure substances

Write the Chemical Name of the Following and Also Give Their Molecular Formulae:

Baking Soda

How is sodium chloride different from its constituent elements ?

Why is iron sulphide a compound ?

Suggest a suitable technique to separate the constituents of the following mixtures. Also give the reason for selecting the particular method.

Salt from sea water

What is chromatography? For which type of mixture is it used?

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A mixture of sand and ammonium chloride can be separated by

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 A pair of metalloids are

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 Which of the following property is not shown by compounds?

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Which of the gas is highly soluble in water ?