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

Answer the following questions with reference to the electrorefining of copper:

Write the reaction taking place at the cathode.

Differentiate between the following pair based on the criteria given in the bracket:

Sulphuric acid and hydrochloric acid [type of salts formed]

The compound that will produce sulphur dioxide gas when reacted with dilute HCl.

The solution of this compound produces dirty green precipitate with NaOH.

State which of the two — a solution of HCl in water or in toluene is an electrolyte. Explain.

State which of the two - a solution of HCl in water or in toluene is an electrolyte. Explain.

Convert Hydrochloric acid to nascent chlorine.

Write an equation for the reaction of hydrochloric acid on manganese (IV) oxide.

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

Carbon, Fluorine, Beryllium (decreasing order of atomic size).

State which of the two - a solution of HCl in water or in toluene is an electrolyte. Explain.

State which of the two - a solution of HCl in water or in toluene is an electrolyte. Explain.

State which of the two - a solution of HCl in water or in toluene is an electrolyte. Explain.

Assertion (A): Dry hydrogen chloride gas is collected by the upward displacement of air.

Reason (R): Hydrogen chloride gas is lighter than air.

A student takes Cu, Al, Fe and Zn strips, separately in four test tubes labeled as I, II, III and IV respectively. He adds 10 ml of freshly prepared ferrous sulphate solution to each test tube and observes the colour of the metal residue in each case.

He would observe a black residue in the test tubes:

______ does not form an acid salt.

Arrange the following as per instruction given in the bracket.

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

Arrange the following in order of increasing radii:

Cl⁻, Cl

Explain your choice.

Arrange the following in order of increasing radii:

Mg²⁺, Mg, Mg⁺

Explain your choice.

Arrange the following in order of increasing radii:

N, O, P

Explain your choice.

In Period 3 of the Periodic Table, element B is placed to the left of element A. On the basis of this information, choose the correct word from the option to complete the following statement:

The element A would have ______ atomic size than B.