0.02
0.04
0.06
0.08
Correct answer is B
No explanation has been provided for this answer.
C 3 H 6
C 4H 8
C 5C 10
C 6H 12
Correct answer is D
No explanation has been provided for this answer.
Which of the following would support the conclusion that a solid sample is a mixture?
the solid can be ground to a fine powder
the density of the solid is 2.25 g dm3
the solid has a melting range of 300oC to 375oC
the solid absorbs moisture from the atmosphere
Correct answer is C
No explanation has been provided for this answer.
the reaction rate increases
concentration of SO3 decreases
concentration of SO3 increases
SO2 gas becomes unreactive
O2 gas becomes unreactive
Correct answer is C
reducing the temperature from 800ºc to 500ºc will favour forward reaction according to Le Chatelier's principle hence the concentration of \(SO_3\) increases.
Pick out the correct statement
Zin heated to redness reacts with steam to give oxygen and zinc oxide
Zinc heated to redness reacts with steam to give oxygen and hydrogen
Zinc does not react with hot or cold water
Zinc reacts with hot water to form zinc oxide and hydrogen
Zinc reacts very easily with cold water to give zinc oxide and hydrogen
Correct answer is D
No explanation has been provided for this answer.