d- and f-Block Elements

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). In the light of the above statements, choose the most appropriate answer from the options given below :

1. (A) is true but (R) is false
2. Both (A) and (R) are true and (R) is the correct explanation of (A)
3. Both (A) and (R) are true but (R) is not the correct explanation of (A)
4. (A) is false but (R) is true

Which of the following compounds show colour due to d-d transition?

1. K2Cr2O7
2. CuSO4 5H2O
3. KMnO4
4. K2CrO4

Identify correct statements from below: Choose the correct answer from the options given below:

1. B, D, E only
2. A, B, C only
3. A, D, E only
4. B, C, D only

The metals that are employed in the battery industries are Choose the correct answer from the options given below:

1. A, B, C, D and E
2. A, B, C and D only
3. B, D and E only
4. B, C and E only

Choose the correct statements from the following Choose the correct answer from the options given below :

1. A, B and D only
2. A, B and C only
3. A and C only
4. B and C only

In the reaction of potassium dichromate, potassium chloride and sulfuric acid (conc.), the oxidation state of the chromium in the product is (+) .

Match List I with List II. Choose the correct answer from the options given below :

1. A-III, B-IV, C-I, D-II
2. A-I, B-II, C-III, D-IV
3. A-IV, B-III, C-I, D-II
4. A-II, B-I, C-IV, D-III

Diamagnetic Lanthanoid ions are :

1. La3+ \& Ce4+
2. Nd3+ \& Ce4+
3. Lu3+ \& Eu3+
4. Nd3+ \& Eu3+

A and B formed in the following reactions are: CrO2Cl2 + 4NaOH A + 2NaCl + 2H2O, A + 2HCl + 2H2O2 B + 3H2O

1. A = Na2Cr2O7, B = CrO5
2. A = Na2CrO4, B = CrO5
3. A = Na2Cr2O4, B = CrO4
4. A = Na2Cr2O7, B = CrO3

Alkaline oxidative fusion of MnO2 gives "A" which on electrolytic oxidation in alkaline solution produces B. A and B respectively are

1. Mn2O3 and MnO42-
2. Mn2O7 and MnO4-
3. MnO42- and MnO4-
4. MnO42- and Mn2O7