Chemistry Past Questions and Answers

Which of the following will react further with oxygen to form higher oxide?

A NO and H2O
B CO and CO2
C SO2 and NO
D CO2 and H2O

Question 462:

In the course of an experiment, two gases X and Y were produced. X turned wet lead ethanoate to black and Y bleached moist litmus paper. What are the element(s) in each of the gases X and Y respectively?

A H and S;Cl
B H and O;Cl
C H and S;C and O
D H and Cl;S and O

Question 463:

Which of the following metals does NOT form a stable trioxocarbonate (IV)?

A Fe
B Al
C Zn
D Pb
E None of the options is correct

Question 464:

Which of the following sulphides is insoluble in dilute HCl?

A Na2S
B ZnS
C CuS
D FeS

Question 465:

When chlorine is passed into water and subsequently exposed to sunlight, the gas evolved is?

A HCl
B HOCl
C O2
D Cl2O