Advertisements
Advertisements
Questions
Write observation:
A small piece of zinc is added to dilute hydrochloric acid.
State one appropriate observation when a small piece of zinc is added to dilute hydrochloric acid.
Advertisements
Solution
Hydrogen gas is evolved with brisk effervescence. The gas burns with a ‘pop’ sound when tested with a burning splint.
\[\ce{Zn + 2HCl -> ZnCl2 + H2 ^}\]
APPEARS IN
RELATED QUESTIONS
State your observations when Dilute Hydrochloric acid is added to Sodium thiosulphate.
Write an equation for the reaction of hydrochloric acid on magnesium foil.
State the use of aqua-regia.
Fill in the blank:
On addition of silver nitrate to hydrochloric acid ___________ precipitate is formed which is soluble in ____________
- What must be added to sodium chloride to prepare hydrogen chloride?
- Write the equation for the reaction which takes place in question (a).
A solution of hydrogen chloride in water is prepared. The following substances are added to separate portions of the solution:
| S. No. | Substances added | Gas evolved | Odour |
| 1. | Calcium carbonate | _________ | _________ |
| 2. | Magnesium ribbon | _________ | _________ |
| 3. | Manganese (IV) oxide with heating | _________ | _________ |
| 4. | Sodium sulphide | _________ | _________ |
Complete the table by writing the gas evolved in each case and its odour.
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
Write an equation for the reactions of hydrochloric acid on manganese (IV) oxide.
Write an equation for the reaction of hydrochloric acid on manganese (IV) oxide.
Study the flow chart and give balanced equations with conditions for the conversions A, B, C, D, and E.
