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1.

A sudden jump between the values of second and third ionization energies of an element would be associated with the electronic configuration :
1. $1{\mathrm{s}}^2,<mspace\; width="1em"></mspace>2{\mathrm{s}}^2<mspace\; width="1em"></mspace>2{\mathrm{p}}^6,<mspace\; width="1em"></mspace>3{\mathrm{s}}^1$
2. $1{\mathrm{s}}^2,<mspace\; width="1em"></mspace>2{\mathrm{s}}^2<mspace\; width="1em"></mspace>2{\mathrm{p}}^6,<mspace\; width="1em"></mspace>3{\mathrm{s}}^2<mspace\; width="1em"></mspace>3{\mathrm{p}}^1$
3. $1{\mathrm{s}}^2,<mspace\; width="1em"></mspace>2{\mathrm{s}}^2<mspace\; width="1em"></mspace>2{\mathrm{p}}^6,<mspace\; width="1em"></mspace>3{\mathrm{s}}^2<mspace\; width="1em"></mspace>3{\mathrm{p}}^2$
4. $1{\mathrm{s}}^2,<mspace\; width="1em"></mspace>2{\mathrm{s}}^2<mspace\; width="1em"></mspace>2{\mathrm{p}}^6,<mspace\; width="1em"></mspace>3{\mathrm{s}}^2$

2. Consider the given two statements:

Assertion (A):	Fluorine atom has less electron affinity than chlorine atom.
Reason (R):	Additional electrons are repelled more strongly by 3p electrons in chlorine atom than by 2p electrons in fluorine atom.

 

1.	Both (A) and (R) are True and (R) correctly explains (A)
2.	Both (A) and (R) are True but (R) does not correctly explain (A)
3.	(A) is True but (R) is False
4.	Both (A) and (R) are False

3.

Which of the following oxides is the most basic in nature?
1. Bi₂O₃ 
2. Bi₂O₅ 
3. As₂O₃ 
4. Sb₂O₅ 

4.

In the following graph of variation of ionization energy with atomic number, X, Y, and Z represent elements.

The group number of X, Y, and Z elements is:

1.	1st group	2.	15th group
3.	17th group	4.	18th group

5.

The correct statement regarding an element with the IUPAC name "unununium" is:
1. It is an inner transition element.
2. It belongs to the 8^th period in the periodic table.
3. It is a transition element.
4. It is a non-transition element.

6.

The order of ionisation potential between He⁺ ion and H-atom (both species are in gaseous state) is :
1. I.P(He⁺ ) = I.P (H)
2. I.P(He⁺ ) < I.P (H)
3. I.P(He⁺ ) > I.P (H)
4. Cannot be compared
 

7. Which of the following statements are not true about the periodic table?

A.	The properties of elements are function of atomic weights.
B.	The properties of elements are function of atomic numbers.
C.	Elements having similar outer electronic configuration are arranged in the same period.
D.	An element's location reflects the quantum numbers of the last filled orbital.
E.	The number of elements in a period is the same as the number of atomic orbitals available in energy level that is being filled.

Choose the correct answer from the options given below:
1. A, C and E Only
2. D and E Only
3. A and E Only
4. B, C and E Only

8.

The correct order of electron gain enthalpy is:
1. S > Se > Te > O
2. Te > Se > S > O
3. O > S > Se > Te
4. S > O > Se > Te

9.

Second ionization potential of Li, Be and B is in the order:
1. Li > Be > B
2. Li > B > Be
3. Be > Li > B
4. B > Be > Li

10.

Identify the pair of elements with similar electronegativity from the options given below:

1.	B and C	2.	B and Al
3.	B and Si	4.	Al and C

11.

With reference to concept of ionisation potential, which one of the following sets are incorrect ?
1. Li > K> Cs
2.  B > U > K
3. Cs > U > B
4. None of the above

12.

The incorrect order of radius is :
\(1.~~\mathrm{Sr}^{2+}<{\mathrm{Rb}}^{+}<{\mathrm{Br}}^{-}<\mathrm{Se}^{2-}\)
2. \( \mathrm{Nb}^{5+}<\mathrm{Zr}^{4+}<\mathrm{Y}^{3+}\)
3. \(\mathrm{Co}>\mathrm{Co}^{2+}>\mathrm{Co}^{3+}>\mathrm{Co}^{4+}\)
4. \(\mathrm{Ba}^{2+}>\mathrm{Cs}^{+}<\mathrm{Se}^{2-}<\mathrm{As}^{3-} \)

13. Given below are two statements:

Assertion (A):	Electron gain enthalpy of oxygen is more than that of sulphur.
Reason (R):	Oxygen is more electronegative than sulphur.

 

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.	Both (A) and (R) are False.

14.

In II period most acidic oxide is formed by:
1. F
2. N
3. Zn
4. Li

15.

The order of electron gain enthalpy in the case of halogens is:
1. F > Cl > Br > I
2. I > Br > Cl > F
3. Cl > F > Br > I
4. I > Br > F > Cl