(English Medium) ICSE Class 10 - CISCE Question Bank Solutions for Chemistry

Give reason for the following:

Inert gases do not form ion.

A group of elements in the periodic table is given below (Boron is the first member of the group and Thallium is the last).

Boron, Aluminium, Gallium, Indium, Thallium

Answer the following question in relation to the above group of elements:

If the electronic configuration of aluminium is 2, 8, 3, how many electrons are there in the outer shell of thallium?

How many atoms of each kind are present in the following molecule:

Chlorine

How many atoms of each kind are present in the following molecule:

water

How many atoms of each kind are present in the following molecule:

carbon tetrachloride

How many electrons are required or released by each atom in chlorine to attain the nearest noble gas configuration?

How many electrons are required or released by each atom in water molecule to attain the nearest noble gas configuration?

How many electrons are required or released by each atom in carbon tetrachloride to attain the nearest noble gas configuration?

The one which is composed of all the three kinds of bond.[ionic, covalent and coordinate bond]

Elements A, B and C have atomic number 17, 19 and 10 respectively.

State which one is a metal.

Elements A, B and C have atomic number 17, 19 and 10 respectively.

State which one is chemically inert.

Elements A, B and C have atomic number 17, 19 and 10 respectively.

Write down the formula of the compound formed by two of the above elements.

Select the correct answer from A, B, C, D and E.

A compound which in the aqueous solution state, is neutral in nature.

Complete the following blank in the equation as indicated.

\[\ce{CaH2_{(s)} + 2H2O_{( aq)}-> Ca(OH)2_{(s)} + 2H2_{(g)}}\]

Grams: 42 g + ______ `→` ______ + ______

Complete the following blank in the equation as indicated.

\[\ce{CaH2_{(s)} + 2H2O_{( aq)}-> Ca(OH)2_{(s)} + 2H2_{(g)}}\]

Molecules: 6.02 × 10²³ + ______ `→` ______ + ______

Potassium sulfite on reacting with hydrochloric acid releases _______ gas. (Cl₂, SO₂, H₂S)

Identify the substance underlined, in the following case:

Cation that does not form a precipitate with ammonium hydroxide but forms one with sodium hydroxide.

Identify the substance underlined, in the following case

An organic compound containing – COOH functional group

Write a balanced chemical equation for the following:

Action of cold and dilute Nitric acid on Copper

State one relevant observation for given reactions:

Action of dilute Hydrochloric acid on iron (II) sulfide.