Which of the following is not a halogen?
Silicon
Fluorine
Astatine
Bromine
lodine
Correct answer is A
No explanation has been provided for this answer.
The gaseous product formed when ammonia is passed over heated copper (ll) oxide is
oxygen
nitrogen
hydrogen
nitrogen (l) oxide
Correct answer is B
No explanation has been provided for this answer.
Irrigation water is passed underneath the soil through
Sprinklers
Canals
Drips
Pipes
Correct answer is D
No explanation has been provided for this answer.
Which of the following farming practices encourages soil degradation?
Fertilizer application
Bush burning
Cover cropping
Fungicide application
Correct answer is B
No explanation has been provided for this answer.
Sodium chloride is used in the following processes except in the
treatment of polluted water
preservation of food
separation of soap from glycerol
manufacture of chlorine
manufacture of caustic soda
Correct answer is A
No explanation has been provided for this answer.