Mention the respective properties of the following allotropes of carbon that account for their uses as indicated: (a) diamond used for drilling rocks; (b) d...

(a) If L is the Avogadro constant and E° is standard cell potential, state what X and Y stand for in the following expressions (i) X = \(\frac{\text{Mass of ...

(a) State one air pollution that causes: (i) blood poisoning (ii) acid poisoning (iii) blackening of the walls of buildings (b) Mention one major chemical in...

(a) Name the residue obtained on strongly heating the following: (i) ZnCO\(_3\) in an open crucible; (ii) CuSO\(_4\), 5H\(_2\)O and then allowing it to cool ...

Classify each of the following as physical change or a chemical change: (a) fractional distillation of liquefied air; (b) cracking of petroleum fractions; (c...

(a) Give one disadvantage of: (i) hard water (ii) soft water (b) Explain why the degree of hardness in a sample of clear lime water is higher than in another...

State which of the following can exhibit geometric isomerism: Give reason for your answer

(a) X and Y belong to the same period in the Periodic Table is a group I element while Y belongs to group VII. State which of the elements would (i) be a goo...

(a) State the phenomenon illustrated by the: (i) spreading of the smell of hydrogen sulphide gas in the laboratory; (ii) existence of atoms of the same eleme...