0.1 mole
0.2mole
0.3 mole
1.0 mole
2.9 moles
Correct answer is C
No explanation has been provided for this answer.
The control of spear grass on the farm is difficult because
It produces a large quantity of seeds
It is easily propagated by suckers
It has a very persistent rhizome
Seeds presist in the soil for a long time
Correct answer is C
No explanation has been provided for this answer.
The following salts dissolve readily in cold water except
CaCI2
PbSO4
(NH4)2SO4
Na2CO3
Na2SO3
Correct answer is B
No explanation has been provided for this answer.
Copper (ll) tetraoxosulphate (VI) is often added to swimming pools because it
prevents the growth of algae
coagulates suspended particles
neutralizes dissolved gases in water
reacts with any excess chlorine present
increases the amount of dissolved oxygen
Correct answer is A
No explanation has been provided for this answer.
Rosette disease of groundnut is transmitted by
An eelworm
A grasshopper
A whitefly
An aphid
Correct answer is D
No explanation has been provided for this answer.