Which of the following oxide is amphoteric in nature?
1. SnO
2.
3.
4.
The increasing order of non-metallic character of the elements N, P, O, and S is:
1. P < S < N < O
2. O < S < N < P
3. O < N < S < P
4. N < S < O < P
An atom has electronic configuration is 1s2 2s2 2p6 3s2 3p6 3d3 4s2 , you will place it in :
(1) V group
(2) XV group
(3) II group
(4) III group
Ionic radii are :
(1) Inversely proportional to effective nuclear charge.
(2) Inversely proportional to square of effective nuclear charge.
(3) Directly proportional to effective nuclear charge.
(4) Directly proportional to square of effective nuclear charge.
The atomic species that has the maximum ionization energy is :
1. | O- | 2. | S- |
3. | Se- | 4. | Te- |
One mole of magnesium in the vapour state absorbed 1200 kJ mol-1 of energy.
If the first and second ionization energies of Mg are 750 and 1450 kJ mol-1 respectively,
the final composition of the mixture is
1. 86% Mg+ + 14% Mg2+
2. 36% Mg+ + 64% Mg2+
3. 69% Mg+ + 31% Mg2+
4. 31% Mg+ + 69% Mg2+
The correct order of metallic character of elements B, Al, Mg and K is :
1. | B > Al > Mg > K
|
2. | Al > Mg > B > K
|
3. | Mg > Al > K > B
|
4. | K > Mg > Al > B |
Considering the elements B, C, N, F, and Si; the correct order of their non-metallic character is :
1. | B > C > Si > N > F | 2. | Si > C > B > N > F |
3. | F > N > C > B > Si | 4. | F > N > C > Si > B |
The correct order of their chemical reactivity of the elements F, Cl, O and N in terms of oxidizing property is :
1. F > Cl > O > N
2. F > O > Cl > N
3. Cl > F > O > N
4. O > F > N > Cl
How does electron affinity change when we move from left to right in a period in the
periodic table?
1. Generally increases
2. Generally decreases
3. Remains unchanged
4. First increases and then decreases