Advertisements
Advertisements
प्रश्न
Give a chemical test to distinguish between dilute sulphuric acid and conc. sulphuric acid.
उत्तर
- Dilute sulphuric acid treated with zinc gives hydrogen gas, which burns with a pop sound. Concentrated \[\ce{H2SO4}\] gives \[\ce{SO2}\] gas with zinc, and the gas turns acidified potassium dichromate paper green.
- Barium chloride solution gives white ppt. with dilute \[\ce{H2SO4}\]. This white ppt. is insoluble in all acids.Concentrated \[\ce{H2SO4}\] and \[\ce{NaCl}\] mixture when heated gives dense white fumes if a glass rod dipped in ammonia solution is brought near it.
APPEARS IN
संबंधित प्रश्न
State one relevant observation for given reactions:
Addition of ethyl alcohol to acetic acid in the presence of concentrated Sulphuric acid
How will you distinguish between dilute hydrochloric acid and dilute sulphuric acid using lead nitrate solution?
The acid which is used in the preparation of a volatile acid
Give one equation to show the following properties of sulphuric acid:
Dehydrating property
Which property of sulphuric acid is shown by the reaction of the concentrated sulphuric acid with Ethanol?
Give two balanced reactions of each type to show the following properties of sulphuric acid:
Hygroscopic nature
Name the following:
The precipitate obtained by treating aqueous barium chloride with dilute sulphuric acid.
Give reason for the following:
Cotton clothes get burnt with concentrated sulphuric acid.
A, B, C and D summarize the properties of sulphuric acid depending on whether it is dilute or concentrated. Choose the property (A, B, C or D), depending on which is relevant to each of the preparations (i) to (ii).
A. Dilute acid (typical acid properties)
B. Non-volatile acid
C. Oxidizing agent
D. Dehydrating agent
(i) Preparation of hydrogen chloride.
(ii) Preparation of ethane from ethanol
(iii) Preparation of copper sulphate from copper oxide.
Hydrogen chloride gas is prepared in the laboratory by the action of concentrated sulphuric acid on sodium chloride.
What is the property of sulphuric acid that makes it a suitable reagent for the reaction?
