Which of the following statement describes an advantage of underground drainage? It
Allows for free movement of farm machinery
Checks the growth of weeds
Improves soil texture
Increases organic matter content of soil
Correct answer is A
No explanation has been provided for this answer.
Fe2+
MnO-4
H+
Fe3+
Correct answer is B
No explanation has been provided for this answer.
3
4
5
6
Correct answer is D
2AL(s) + 6H +(aq) → 2AL3+(aq) + 3H2(g). One aluminium atom transfers 3 electrons :. Two aluminium atoms will transfer 2x3=6 electrons
Metals can be extracted from their ores by a process involving
reduction
oxidation
hydrolysis
decomposition
Correct answer is A
No explanation has been provided for this answer.
The use of inorganic fertilizer is preferable to organic manure because inorganic fertilizer
Improves soil structure
Releases nutrients to the soil faster
Reduces leaching of soil nutrients
Improves soil water holding capacity
Correct answer is B
No explanation has been provided for this answer.