Match the following : 

       Oxide         Nature 

(a) CO           (i)  Basic 

(b) BaO         (ii) Neutral 

(c) Al2O3          (iii) Acidic 

(d) Cl2O7         (iv) Amphoteric 

Which of the follwing is correct option ? 

      a       b       c         d

(1) (ii)    (i)     (iv)     (iii) 

(2) (iii)    (iv)   (i)       (ii) 

(3) (iv)    (iii)   (ii)      (i) 

(4) (i)     (ii)    (iii)     (iv) 

Subtopic:  Nature of Compound |
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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

Identify the correct match :

(1) (a)-(ii),  (b)-(iv),  (c)-(i),   (d)-(iii)

(2) (a)-(ii),  (b)-(i),    (c)-(iv),  (d)-(iii)

(3) (a)-(iv), (b)-(iii),   (c)-(i),   (d)-(ii)

(4) (a)-(i),   (b)-(ii),   (c)-(iii),   (d)-(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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In which of the following options the order of arrangement does not agree with the

variation of property indicated against it?

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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Subtopic:  Electronic Configuration |
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"Metals are usually not found as nitrates in their ores'"

Out of the following two (I and II) reasons which is/are true for the above observation?

I. Metal nitrates are highly unstable.

II. Metal nitrates are highly soluble in water.

1. I and ll are true 

2. I and II are false

3. I is false but ll is true

4. l is true but ll is tase

Subtopic:  Stability of Compound |
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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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