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

Give the names of the first four members of the homologous series of
alkynes.

Give three points to differentiate between saturated and unsaturated
hydrocarbons.

Copy and complete the following table, which relates to the three homologous series of hydrocarbons:

What are the term defined below?

A bond formed by a shared pair of electrons with both electrons coming from the same atom.

Write the name and formula of the fourth member of the following homologous series:

Alkyne

What is a homologous series?

What is the difference in the molecular formula of any two adjacent homologues:

(i) In terms of molecular mass

(ii) In terms of number and kind of atoms per molecule?

Haloalkanes react with alkalies to produce alcohol. Give the equation for the preparation of the second member of the homologous series of alcohol. State under what condition the reaction occurs.

Name the following organic compound:

The first homologue whose general formula is C_nH_2n.

Study and complete the following table:

Name the following:

Group of organic compounds where the successive members follow a regular structural pattern, successive compounds differ by a 'CH₂' group.

Give reason for the following:

Covalent compounds have a low melting and boiling point.

Identify the following:

A bond formed between two atoms by sharing of a pair of electrons, with both electrons being provided by the same atom.

Select the ion in the following case, that would get selectively discharged from the aqueous mixture of the ions listed below:

\[\ce{SO^2-_4, NO^-_3 {and} OH-}\]

Select the ion in the following case, that would get selectively discharged from the aqueous mixture of the ions listed below:

Pb²⁺, Ag⁺ and Cu²⁺

Name two substances in the following case:

Contain only ions.

Explain the following:

On electrolysis of dilute copper (II) sulphate solution, copper is deposited at the cathode but no hydrogen gas evolves there. Explain why?

Explain the following: 

When a dilute aqueous solution of sodium chloride is electrolysed between platinum electrodes, hydrogen gas is evolved at the cathode but metallic sodium is not deposited. Why?

Arrange the following according to the instruction given in bracket:

Cu²⁺, Na⁺, Zn²⁺, Ag⁺ (The order of Preferential discharge at the cathode)

Name two substances in the following case:

Contain ions as well as molecules.