11)

What happens when lead nitrate reacts with potassium iodide?

Class 10 Science

A)

Yellow ppt of lead iodide and potassium nitrate will be produced

B)

Large amount of hydrogen release

C)

They will not react

D)

Evolution of gas will occur

12)

Which of the following does show an oxidation reaction?

Class 10 Science

A)

Gain of hydrogen

B)

Loss of oxygen

C)

Gain of oxygen

D)

None of the above

13)

A student adds lead and silver to two different test tubes containing an equal amount of copper sulphate solution. The student observes that the color of the solution in the test tube with lead changes. What explains the change in the colour of the solution?

Class 10 Science

A)

decomposition reaction takes place as copper dissociates from sulphate in the solution.

B)

A combination reaction takes place as lead combines with sulphate in the solution.

C)

A displacement reaction takes place as lead replaces copper from the solution.

D)

A double displacement reaction takes place as copper dissociates from sulphate and lead combines with sulphate in the solution.