(English Medium) ICSE Class 10 - CISCE Important Questions for Chemistry

Name the alloys for the given composition:

Magnesium + Manganese + Aluminium + Copper

Identify the following:

A homogenous mixture of two or more metals or a metal and a non-metal in a definite proportion in their molten state.

State your observation when dilute hydrochloric acid is added to a lead nitrate solution and the mixture is heated.

Fill in the blanks using the appropriate words given below :

(Sulphur dioxide, nitrogen dioxide, Nitric oxide, Sulphuric acid)

Cold, dilute nitric acid reacts with copper to give ___________.

Identify the reactant and write the balanced equation for the following:

Nitric acid reacts with compound Q to give a salt Ca(NO₃)₂, water and carbon dioxide.

Give a balanced equation for the following:

Oxidation of carbon with conc. nitric acid.

Complete the following equations : 
  S + conc.HNO₃ → 

Give the structural formula of the following organic compound:

Methanal

Write the chemical equation for the following:

Combustion of methane

The equation below shows the reaction between element ‘X’ and dilute sulphuric acid.

\[\ce{X_{(s)} + H2SO4_{(aq)} -> XSO4_{(aq)} + H2_{(g)}}\]

Which particles are responsible for conducting electricity in dilute sulfuric acid and compound XSO₄?

State giving reasons if calcium nitrate and lead nitrate can be distinguished by adding ammonium hydroxide solution to the salt solution.

The energy required to remove an electron from a neutral isolated gaseous atom and convert it into a positively charged gaseous ion is called ____________. (electron affinity, ionization potential,
electronegativity)

Arrange the following as per the instruction given in the brackets:

He, Ar, Ne (Increasing order of the number of electron shells)

Arrange the following as per the instruction given in the brackets:

Na, Li, K (Increasing Ionisation Energy)

Arrange the following as per the instruction given in the brackets:

Na, K, Li (Increasing atomic size)

Draw an electron dot diagram to show the formation of each of the following compounds:

Methane

[H = 1, C = 6, Mg = 12, Cl = 17]

Draw an electron dot diagram to show the formation of each of the following compounds:

Magnesium Chloride

[H = 1, C = 6, Mg = 12, Cl = 17]

Rewrite the following sentences by using the correct symbol > (greater than) or < (less than) in the blanks given

The ionization potential of potassium is _________________ that of sodium.

Arrange the following as per the instruction given in the bracket:

Mg, Cl, Na, S, Si (decreasing order of atomic size).

Element X is a metal with a valency 2, Y is 3 non- metal with a valency 3.

1) Write an equation to show how Y from an ion.

2) If Y is a diatomic gas, write an equation for the direct combination of X and Y to form a compound.