When air is passed through alkaline pyrogallol and then lime water, the gases left are
nitrogen and carbon (IV) oxide
nitrogen and noble gases
nitrogen and oxygen
nitrogen, carbon (VI) oxide and noble gases
the noble gases
Correct answer is B
No explanation has been provided for this answer.
A salt which loses its mass when exposed to air is
deliquescent
effervescent
Efflorescent
fluorescent
hygroscopic
Correct answer is C
No explanation has been provided for this answer.
across a period from left to right
across a period from right to left
diagonally down the group
down a group
with decrease in atomic number
Correct answer is A
No explanation has been provided for this answer.
Sulphur has an oxidation number of +4 in
H2S
H2S04
MgSO4
Na2SO3
S03
Correct answer is D
No explanation has been provided for this answer.
If the volume of a gas at 35°C is 60cm3, what would be its volume in cm3 at 273k?
39.03
46.81
53.18
67.69
76.92
Correct answer is C
No explanation has been provided for this answer.