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

From the list given below, select the word(s) required to complete the blanks (i) to (v) in the following passage:

Note: words chosen from the list are to be used only once. Write only the answers. Do not copy the passage.

[reddish brown, ammonium, nitrogen dioxide, hydroxyl, dirty green, ammonia, acidic, alkaline]
Nitrogen and hydrogen combine in the presence of a catalyst to give (i) ______ gas. When the above mentioned gas is passed through water it forms a solution which will be (ii) ______ in nature and the solution contains (iii) ______ ions and (iv) ______ ions. The above solution when added to iron (II) sulphate solution gives a (v) ______ coloured precipitate of iron (II) hydroxide.

Choose the correct answer from the options given below :
When dilute sulphuric acid reacts with iron sulphide, the gas evolved is _______

Potassium sulphite on reacting with hydrochloric acid releases ______ gas.

Sodium hydroxide solution is added first in a small quantity, then in excess to the aqueous salt solution of copper (II) sulphate, zinc nitrate, lead nitrate, calcium chloride and iron (III) sulphate. Copy of the following table and write the colour of the precipitate in (i) to (v) and the nature of the precipitate (soluble or insoluble) in (vi) to (x).

The salt which in solution gives a pale green precipitate with sodium hydroxide solution and a white precipitate with barium chloride solution is ______.

Write balanced equation for a metal that evolves a gas which burns with a pop sound when boiled with alkali solutions.

Write balanced equations for a coloured metallic oxide which dissolves in alkalis to yield colourless solutions.

Write balanced equation :

Copper sulphate solution with ammonium hydroxide solution.

Write balanced equation:

Copper sulphate solution with ammonium hydroxide solution.

Write balanced equations for a metal that evolves into a gas which burns with a pop sound when boiled with alkali solutions.

Write balanced equations for a coloured metallic oxide which dissolves in alkalis to yield colourless solutions.

Write balanced equations for a metal that evolves a gas which burns with a pop sound when boiled with alkali solutions.

Write balanced equation for a coloured metallic oxide which dissolves in alkalis to yield colourless solutions.

Write balanced equation for a coloured metallic oxide which dissolves in alkalis to yield colourless solutions.

Write balanced equation for a metal that evolves a gas which burns with a pop sound when boiled with alkali solutions.

Write balanced equations for a coloured metallic oxide which dissolves in alkalis to yield colourless solutions.

Write balanced equation for a coloured metallic oxide which dissolves in alkalis to yield colourless solutions.