Q. No.Match Column I with Column II.
Column-I
Column-II
(a)
Copper
(i)
Non-metal
(b)
Fluorine
(ii)
Transition metal
(c)
Silicon
(iii)
Lanthanoid
(d)
Cerium
(iv)
Metalloid
(a)
(b)
(c)
(d)
1.
(ii)
(iv)
(i)
(iii)
2.
(ii)
(i)
(iv)
(iii)
3.
(iv)
(iii)
(i)
(ii)
4.
(i)
(ii)
(iii)
(iv)
Correct statement(s) among the following are:
| (a) | Helium has the highest first ionisation enthalpy in the periodic table. |
| (b) | Chlorine has less negative electron gain enthalpy than fluorine. |
| (c) | Mercury and bromine are liquids at room temperature. |
| (d) | In any period, the atomic radius of alkali metal is the highest. |
Choose the correct option:
1. (a), (c), (d)
2. (a), (b), (c)
3. (a), (c)
4. (a), (d)
Match the following isoelectronic species in Column-I and Column-II:
| Column-I | Column II | ||
| i. | a. | ||
| ii. | Ar | b. | |
| iii. | c. | ||
| iv. | d. |
| i | ii | iii | iv | |
| 1. | b | c | a | d |
| 2. | c | b | a | d |
| 3. | c | d | b | a |
| 4. | b | c | d | a |
Given below are two statements:
| Assertion (A): | Electron gain enthalpy becomes less negative as we go down a group. |
| Reason (R): | The size of the atom increases on going down the group and the added electron would be farther from the nucleus. |
| 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 True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Given below are two statements:
| Assertion (A): | Boron has a smaller first ionisation enthalpy than beryllium. |
| Reason (R): | The penetration of 2s electron to the nucleus is more than the 2p electron hence 2p electron is more shielded by the inner core of electrons than the 2s electrons. |
| 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 True but (R) is False. |
| 4. | (A) is False but (R) is True. |
| Assertion (A): | Generally, ionisation enthalpy increases from left to right in a period. |
| Reason (R): | When successive electrons are added to the orbitals in the same principal quantum level, the shielding effect of inner core of electrons does not increase very much to compensate for the increased attraction of the electron to the nucleus. |
| 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 true but (R) is false. |
| 4. | (A) is false but (R) is true. |
The electronic configuration of some elements is given in Column-I and their electron gain enthalpies are given in Column-II. Match the electronic configuration with the electron gain enthalpy:
| Column-I (Electron configuration) |
Column-II (Electron gain enthalpy/ kJ mol¯1) |
||
| A. | \(1 s^2 2 s^2 2 p^6\) | (i) | \(-53\) |
| B. | \(1 s^2 2 s^2 2 p^6 3 s^1\) | (ii) | \(-328\) |
| C, | \(1 s^2 2 s^2 2 p^5 \) | (iii) | \(-141\) |
| D. | \( 1 s^2 2 s^2 2 p^4 \) | (iv) | \(+48\) |
| Options: | A | B | C | D |
| 1. | (iv) | (i) | (ii) | (iii) |
| 2. | (i) | (ii) | (iii) | (iv) |
| 3. | (i) | (iv) | (iii) | (ii) |
| 4. | (iv) | (i) | (iii) | (ii) |
Match the correct ionization enthalpies and electron gain enthalpies of the following elements.
|
Elements |
|
|
|
||
|
(i) |
Most reactive non-metal |
A. |
419 |
3051 |
-48 |
|
(ii) |
Most reactive metal |
B. |
1681 |
3374 |
-328 |
|
(iii) |
Least reactive element |
C. |
738 |
1451 |
-40 |
|
(iv) |
Metal forming binary halide |
D. |
2372 |
5251 |
+48 |
Codes
| A | B | C | D | |
| 1. | ii | i | iv | iii |
| 2. | i | ii | iii | iv |
| 3. | i | iv | iii | ii |
| 4. | iv | i | iii | ii |
Match the elements given in List-I with the atomic radius given in List-II the correct atomic radius with the corresponding element.
|
List-I
Element
|
List-II
Atomic radius (pm)
|
||
| A. | Be | i. | 74 |
| B. | C | ii. | 85 |
| C. | O | iii. | 112 |
| D. | B | iv. | 77 |
| E. | N | v. | 66 |
| Options: | A | B | C | D | E |
| 1. | i | ii | iii | iv | v |
| 2. | iii | iv | v | ii | i |
| 3. | iv | ii | iii | i | v |
| 4. | v | ii | i | iii | iv |
The correct order of ionization energy of W, X, Y and Z is-
| 1. | W > X > Y > Z | 2. | W < X < Y > Z |
| 3. | W < X > Y< Z | 4. | W > X > Y< Z |
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