p-Block Elements (Group 15–18)

Choose the correct statements about the hydrides of group 15 elements. Choose the most appropriate from the options given below :

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

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 from the options given below:

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

Anomalous behavior of oxygen is due to its

1. large size and low electronegativity
2. small size and high electronegativity
3. small size and low electronegativity
4. large size and high electronegativity

Element not showing variable oxidation state is :

1. Bromine
2. Iodine
3. Chlorine
4. Fluorine

Given below are two statements : In the light of the above statements, choose the most appropriate answer from the options given below :

1. Statement I is correct but Statement II is incorrect
2. Both Statement I and Statement II are incorrect
3. Statement I is incorrect but Statement II is correct
4. Both Statement I and Statement II are correct

1 mole of PbS is oxidised by "X" moles of O3 to get "Y" moles of O2. X + Y = .