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

Write sqauential observation for effect of heat on Copper nitrate.

State what do you observe when ammonium hydroxide to Iron (III) sulphate solution.

From the formulae listed below, Choose, one, corresponding to the salt having the given description:
AgCl, CuCO₃, CuSO₄.5H₂O, KNO₃, NaCl, NaHSO₄, Pb(NO₃)₂, ZnCO₃, ZnSO₄, 7H₂O.
On heating this, salt changes from green to black.

How would you distinguish between Zn²⁺ and Pb²⁺ using ammonium hydroxide solution?

Write the observation for the following:
NaOH is added drop-wise till in excess to a solution of zinc sulphate.

Write the observation for the following :
NH₄OH is added first in a small quantity and then in excess to a solution of copper sulphate.

Write the observation for the following:
Excess NH₄OH is added to a substance obtained by adding hydrochloric acid in silver nitrate solution.

What would you observe in the following cases:

Ammonium hydroxide is first added in a small quantity and then in excess to a solution of copper sulphate.

The following table shows the tests a student performed on four different aqueous solutions which are X,Y,Z and W. Based on the observations provided, Identify the cation present

State the inference drawn from the following observation:

Salt S is prepared by reacting dilute sulphuric acid with copper oxide Identify S.

Identify the cation of the following case:
NaOH solution when added to solution (A) gives a reddish brown precipitate

Identify the cation of the following case:
NH₄OH solution when added to solution (B) gives white ppt. which does not dissolve in excess.

Identify the cation of the following case:
NaOH solution when added to solution (C) gives white ppt. which insoluble in excess.

What is the difference between the chemical nature of an aqueous solution of HCl and an aqueous solution of NH₃

Explain the following method with example. 

Direct combination

Explain the following:

H₃PO₃ is not a tribasic acid.

Explain the following:

Nitrogen dioxide is a double acid anhydride.

Fill in the blanks with suitable words:

An acid is a compound which when dissolved in water forms hydronium ions as the only ______ ions. A base is a compound which is soluble in water and contains ______ ions. A base reacts with an acid to form a ______ and water only. This type of reaction is known as ______.

Explain why Anhydrous FeCl₃ cannot be prepared by heating hydrated iron (III) chloride.

For each of the salt: A, B, C and D, suggest a suitable method of its preparation.

A is a sodium salt.