Related Questions
(i) Name the process used to manufacture Hydrogen.
(ii) Write all the reactions involved (with proper conditions).
The question refers to the elements of the periodic table with atomic numbers from 3 to 18. In the table below, the elements are shown by letters which are not indicative of the usual symbols of the elements.
At. No. 3 4 5 6 7 8 9 10 Element A B C D E F G H At. No. 11 12 13 14 15 16 17 18 Element I J K L M N O P Which of these is :
- a noble gas ?
- a halogen ?
- an element with valency 4 ?
Give a scientific term for each of the following:
(i) When a substance absorbs moisture from the atmosphere and does not form a solution.
(ii) When a compound loses water of crystallization on exposure to dry air.
Give a balanced chemical equation for the following :
(i) Exothermic reaction that is also a combination reaction.
(ii) A decomposition reaction involving salt of zinc.
(iii) A double decomposition reaction where a white precipitate is formed.