Which of the following is not an impurity present in hydrogen gas during the laboratory preparation of hydrogen?

Q. Sulphuric acid can be used In the laboratory to prepare the following substances :
(a) Hydrogen (b) Carbon dioxide
(c) Carbon monoxide (d) Sulphur dioxide
(e) Hydrogen chloride (f) Hydrogen sulphide
(g) Nitric acid.
1. Derive a balanced equation for each of the shove preparation.
2. In which of the reactions would you use (give numbers only): (i) Dilute Sulphuric acid, (ii) Sulphuric acid.
3. State the chemical property of sulphuric acid illustrated in each of these reactions.

Q. _________ sulphur is prepared by passing hydrogen sulphide gas into an aqueous solution of sulphur dioxide.

Q. Fill in the blanks.
___________ sulphur is prepared by passing hydrogen sulphide gas into an aqueous solution of sulphur dioxide.

Q.

(a) Name the chemicals required for the preparation of carbon dioxide in the laboratory.

(b) How will you collect the gas?

(c) Write the balanced chemical equation for the above reaction.

(d) Why is sulphuric acid not used for the preparation of carbon dioxide in the laboratory?

Q. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Which of the following are ejected during volcanoes ?
1. Water Vapour
2. Carbon dioxide (CO2)
3. Sulphur dioxide (SO2)
4. Hydrogen sulphide (H2S)