(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 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.

Choose the correct answer from the options given below:

Ionisation potential increases over a period from left to right because of the

(A) Atomic radius increases and nuclear charge increases

(B) Atomic radius decreases and nuclear charge decreases

(C) Atomic radius increases and nuclear charge decreases

(D) Atomic radius decreases and nuclear charge increases

Choose the correct answer from the options given below:

If an element A belongs to Period 3 and Group II, then it will have

A. 3 shells and 2 valence electrons

B. 2 shells and 3 valence electrons

C. 3 shells and 3 valence electrons

D. 2 shells and 2 valence electrons