Chemistry
Under what conditions can hydrogen be made to combine with
(a) nitrogen
(b) chlorine
(c) sulphur
(d) oxygen
Name the products in each case and write the equation for each reaction.
Related Questions
(a) A metal in the powdered form reacts very slowly with the boiling water, but it decomposes with steam. Name the metal.
(b) Write a balanced equation for the reaction of the named metal with (i) boiling water (ii) steam.
What do you observe when hydrogen gas is passed through soap solution?
When hydrogen is passed over a black solid compound A, the products are 'a colourless liquid' and 'a reddish-brown metal B.'
Substance B is divided into two parts, each placed in separate test tubes.
Dilute HCl is added to one part of substance B and dilute HNO3 to the other.
(a) Name the substances A and B.
(b) Give two tests for the colourless liquid formed in the experiment.
(c) What happens to substance A when it reacts with hydrogen ? Give reasons for your answer.
(d) Write an equation for the reaction between hydrogen and substance A.
(e) Is there any reaction between substance B and dilute hydrochloric acid ? Give reasons for your answer.
Helium is preferred to hydrogen for filling balloons because it is
- lighter than air
- almost as light as hydrogen
- non-combustible
- inflammable