Advertisements
Advertisements
प्रश्न
Give a chemical test to distinguish between the following gases.
NH3 and HCl
Advertisements
उत्तर
| Ammonia | Hydrogen chloride |
| Litmus test: Moist red litmus blue. | Litmus test: Moist blue litmus paper red. |
APPEARS IN
संबंधित प्रश्न
Name three biochemical catalysts found in the human body.
Write the missing reactants and products and balance the equations.
\[\ce{KClO3 ->[heat]}\] ___________+ ____________
Write true or false :
When iron and sulphur are heated together a grey mass is formed which is attracted by a magnet .
Explain the following reaction with one suitable example of Double decomposition reaction.
Match the pairs.
| a. | Photosynthesis | i. | Tendency to lose electrons |
| b. | Water | ii. | Reactant in combustion process |
| c. | Sodium chloride | iii. | Chemical change |
| d. | Dissolution of salt in water | iv. | Covalent bond |
| e. | Carbon | v. | Ionic bond |
| f. | Fluorine | vi. | Physical change |
| g. | Magnesium | vii. | Tendency to form anion |
Write your observation and a balanced equation in the case of the following substances being heated.
Zinc carbonate.
Anaerobic bacteria digest animal waste and produce biogas (Change – A). The biogas is then burnt as fuel (Change – B). The following statements pertain to these changes. Choose the correct one.
A student took a solution of copper sulphate in a beaker and put a clean iron nail into it and left it for about an hour.
Are these changes chemical in nature?
When magnesium is burnt in the air, a new substance is formed which is ______.
Define the following term:
Chemical change
