The separation of petroleum fractions depends on the differences in their
boiling points
molar masses
melting point
solubilities
Correct answer is A
No explanation has been provided for this answer.
Which of the following oxides of nitrogen has oxidation number of + 1?
KNO3
N2O
N2O3
NO
Correct answer is B
No explanation has been provided for this answer.
a catalyst
an oxidizing agent
a reducing agent
a sulphonating agent
Correct answer is B
No explanation has been provided for this answer.
Which of the following substances is the anode in the dry Leclanche cell ?
Carbon rod
Muslin bag
The seal
Zinc container
Correct answer is D
In a Leclanche cell, the anode is a zinc rod / container and the cathode is a carbon rod with ammonium chloride solution / paste as the electrolyte.
l and ll only
ll, lll and IV only
l, ll and lll only
l, ll, lll and IV
Correct answer is B
No explanation has been provided for this answer.