The IUPAC name of an element with atomic number 119 is 
1. ununoctium 
2. ununennium 
3. unnilennium 
4. unununnium
Subtopic:  Modern Periodic Table & Periodicity |
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Match list-I with list-II:

List-I
Elements
List-II
Atomic radii (pm)
(a) O (i) 88
(b) C (ii) 74
(c) B (iii) 66
(d) N (iv) 77
Choose the correct answer from the options given below:
(a) (b) (c) (d)
1. (ii) (i) (iv) (iii)
2. (iv) (iii) (ii) (i)
3. (i) (iv) (iii) (ii)
4. (iii) (iv) (i) (ii)
Subtopic:  Atomic Size |
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Identify the incorrect match.

Name IUPAC Official Name
a. Unnilunium (i) Mendelevium
b. Unniltrium (ii) Lawrecium
c. Unnilhexium (iii) Seaborgium
d. Unununnium (iv) Darmstadtium

1. (b), (ii)
2. (c), (iii)
3. (d), (iv)
4. (a), (i)

Subtopic:  Modern Periodic Table & Periodicity |
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Match the element in column I with that in 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)
Subtopic:  Electronic Configuration |
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For the second period elements, the correct increasing order of first ionisation enthalpy is:

1.  Li<Be<B<C<O<N<F<Ne

2.  Li<Be<B<C<N<O<F<Ne

3.  Li<B<Be<C<O<N<F<Ne

4.  Li<B<Be<C<N<O<F<Ne

Subtopic:  Ionization Energy (IE) |
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Magnesium reacts with an element (X) to form an ionic compound. If the ground state electronic configuration of (X) is 1s22s22p3, the simplest formula for this compound is : 

1. Mg2X3

2. MgX2

3. Mg2X

4. Mg3X2

Subtopic:  Nature of Compound |
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The incorrect match among the following is -

1. B < C < N < O (increasing first ionisation enthalpy)

2. I < Br < F < Cl (increasing electron gain enthalpy)

3. Li < Na < K < Rb (increasing metallic radius)

4. Al3+ < Mg2+ < Na+ <F- (increasing ionic size)

Subtopic:  Electron Affinity (EA) |
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Which one of the following orders is correct for the bond dissociation enthalpy of halogen

molecules?

1. Cl2>Br2>F2>I2               

2. Br2>I2>F2>Cl2

3. F2>Cl2>Br2>I2               

4. I2>Br2>Cl2>F2

Subtopic:  Electron Affinity (EA) |
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The correct sequence of increasing radii is -

1. Ar < K+ < Ca2+

2. Ca2+ < Ar < K+

3. Ca2+ < K+ < Ar

4. K< Ar < Ca2+

Subtopic:  Atomic Size |
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The formation of the oxide ion O2-(g), from oxygen atom requires first an exothermic and

then an endothermic step as shown below,

O(g) + e-           O-(g); fH° = -141kJmol-1O-(g) +e-           O2-(g); fH° = +780 kJ mol-1

Thus, process of formation of O2- in gas phase is unfavourable even though O2- is

isoelectronic with neon. It is due to the fact that

1. electron repulsion outweighs the stability gained by achieving noble gas configuration

2. O- ion has comparatively smaller size than oxygen atom

3. Oxygen is more electronegative

4. addition of electron in oxygen result in large size of the ion

Subtopic:  Electron Affinity (EA) |
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