Chemistry Class-11: Chapter –8. Redox Reactions Part – 1

Download PDF of This Page (Size: 135K)

Question: 1

Which of the following is not an example of redox reaction?

(i)

(ii)

(iii)

(iv)

Answer: (iv)

Question: 2

The more positive the value of EV, the greater is the tendency of the species to get reduced. Using the standard electrode potential of redox couples given below find out which of the following is the strongest oxidising agent

values:

(i)

(ii)

(iii)

(iv)

Answer: (iv)

Question: 3

EV values of some redox couples are given below. On the basis of these values choose the correct option.

(i)

(ii)

(iii)

(iv)

Answer: (iv)

Question: 4

Using the standard electrode potential, find out the pair between which redox reaction is not feasible.

(i)

(ii)

(iii)

(iv)

Answer: (iv)

Question: 5

Thiosulphate reacts differently with iodine and bromine in the reactions given below:

Which of the following statements justifies the above dual behaviour of thiosulphate?

(i) Bromine is a stronger oxidant than iodine.

(ii) Bromine is a weaker oxidant than iodine.

(iii) Thiosulphate undergoes oxidation by bromine and reduction by iodine in these reactions.

(iv) Bromine undergoes oxidation and iodine undergoes reduction in these reactions.

Answer: (i)

Question: 6

The oxidation number of an element in a compound is evaluated on the basis of certain rules. Which of the following rules is not correct in this respect?

(i) The oxidation number of hydrogen is always .

(ii) The algebraic sum of all the oxidation numbers in a compound is zero.

(iii) An element in the free or the uncombined state bears oxidation number zero.

(iv) In all its compounds, the oxidation number of fluorine is .

Answer: (i)

Question: 7

In which of the following compounds, an element exhibits two different oxidation states.

(i)

(ii)

(iii)

(iv)

Answer: (ii)

Question: 8

Which of the following arrangements represent increasing oxidation number of the central atom?

(i)

(ii)

(iii)

(iv)

Answer: (i)

Doorsteptutor material for NCO Class-11 is prepared by worlds top subject experts- fully solved questions with step-by-step exaplanation- practice your way to success.

Developed by: