Metallurgy — Chemistry STD 10 — Question

Give the name and formula of two : Weak dibasic acids

Sulphuric acid can be used to prepare a number of gases in the laboratory. Write balanced equation for the reaction from which the folllowing gas are obtained, using dilute sulphuric acid as one of the reactant : Sulphur dioxide

Name the following
Basic gas that is used as a refrigerant.

Select from the list given (a to e) one substances in each case which matches the description given in parts (i) to (v). (Note : Each substance is used only one in the answer)
(a) Nitroso Iron (II) Sulphate
(b) Iron (III) chloride
(c) Chromium sulphate
(d) Lead (II) chloride
(e) Sodium chloride
(i) A compound which is deliquescent
(ii) A compound which is insoluble in cold water, but soluble in hot water
(iii) The compound responsible for the brown ring during the brown ring test of nitrate iron
(iv) A compound whose aqueous solution is neutral in nature
(v) The compound which is responsible for the green colouration when sulphur dioxide is passed through acidified potassium dichromate solution.

Ions formed by the loss and gain of electrons respectively.

To carry out the so-called “electrolysis of water”. Sulphuric acid is added to water. How does the addition of sulpuric acid produce a conducting solution?

Draw the structural formula of a compound with two carbon atoms in the following case.
An alcohol containing two carbon atoms

Name the following
Gas obtained by treating chlorine in excess of ammonia.

Name : A base which is not alkali

State one relevant observation of burning of ammonia in air.