Advertisements
Advertisements
प्रश्न
How will you test for the gas which is liberated when hydrochloric acid reacts with an active metal?
उत्तर
Hydrogen gas is liberated when an active metal reacts with hydrochloric acid.
For testing the presence of hydrogen gas, bring a burning candle near the mouth of the test tube in which the reaction is taking place. If the gas burns with a popping sound, then it can be concluded that it is hydrogen.
APPEARS IN
संबंधित प्रश्न
Name the source from which litmus solution is obtained. What is the use of this solution?
When a solution is added to vanilla extract, then the characteristic smell of vanilla cannot be detected. State whether the given solution is an acid or a base.
Name one animal and one plant whose stings contain formic acid (or methanoic acid).
What happens to the H+ ions, of the solution, when an acid is neutralised?
Define the term ‘basicity’ of an acid.
Name the acid present in vinegar.
State one observation for each of the following :
A small piece of zinc is added to dilute hydrochloric acid
The preparation of Lead sulphate from Lead carbonate is a two-step process. (Lead sulphate cannot be prepared by adding dilute Sulphuric acid to Lead carbonate.)
Write the equation for the reaction that will take place when this first step is carried out.
While playing in a park, a child was stung by a wasp. Some elders suggested applying a paste of baking soda and others lemon juice as a remedy. Which remedy do you think is appropriate and why?
A metal 'M' on reacting with dilute acid liberates a gas 'G'. The same metal also liberates gas 'G' when reacts with a base.
- Write the name of gas 'G'.
- How will you test the presence of this gas?
- Write chemical equations for the reactions of the metal with (1) an acid and (2) a base.
