Which of the following properties of the alkaline earth metals increase from Be to Ba?

(i) Atomic radius        (ii) Ionisation energy        (iii) Nuclear charge

(1) (i) and (ii)                                 

(2) (i) and (iii)

(3) (ii) and (iii)                               

(4) (i), (ii) and (iii)

Subtopic:  Atomic Size |
 82%
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Aqueous solutions of two compounds M1-O-H and M2-O-H are prepared in two different beakers. If, the electronegativity of M1=3.4 , M2=1.2, O=3.5 and H=2.1, then the nature of two solutions will be respectively:

(a) acidic, basic             (b) acidic, acidic

(c) basic, acidic             (d) basic, basic

Subtopic:  Electronegativity |
 65%
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The process requiring the absorption of energy is:

1. FF-

2. HH-

3. ClCl-

4. OO2-

Subtopic:  Electron Affinity (EA) |
 69%
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Which of the following sequences accurately represents the correct order?

1. F>N>C>Si>Ga - non-metallic character.

2. F>O>Cl >N - oxidising property.

3. C<Si>P>N - electron affinity value.

4. All of the above.

Subtopic:  Nature of Compound |
 71%
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Which of the following statements is not correct?

1.  The first ionization energy generally decreases from top to bottom within a group

2.  The atomic radius generally increases from top to bottom within a group

3.  The first ionization energy generally decreases from left to right across a period

4.  The second ionization energy of an atom is always greater than the first ionization energy

Subtopic:  Ionization Energy (IE) |
 85%
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What is the general trend observed for the first ionization energies of the elements in groups 13to 17?

1.  Ionization energies tend to increase from left to right in a period and are approximately constant in a group

2.  Ionization energies tend to increase from left to right in a period and decrease from top to bottom in a group

3.  Ionization energies tend to decrease from left to right in a period and increase from top to bottom in a group

4.  Ionization energies tend to decrease from left to right a period and decrease from top to bottom in a group

Subtopic:  Ionization Energy (IE) |
 88%
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Which of the following pairs of substances are allotropes?

1.  CH3CH2OH and CH3OCH3

2.  FeNO32 and FeNO33

3.  NaCl and KCl

4.  O2 and O3 

Subtopic:  Nature of Compound |
 64%
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 Element 114 is most likely to be a

1.  Reddish-brown volatile liquid

2.  A pale yellow-green gas

3.  A colourless crystal

4.  A grey-silvery metal

Subtopic:  Modern Periodic Table & Periodicity |
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Which gas-phase atom has the largest radius?

1.  Na

2.  K

3.  Mg

4.  Ca

Subtopic:  Atomic Size |
 74%
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In which list are atoms of the elements Be, B, Mg and Al arranged from smallest to largest atomic radius?

1.  Be < B < Mg < Al

2.  Mg < Be < Al < B

3.  B < Be < Al < Mg

4.  Al < Mg < B < Be

 

Subtopic:  Atomic Size |
 71%
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