Arrange the elements Li, Be, B, C, and N in increasing order of their first ionization enthalpies:
1. Li < B < Be < C < N
2. Li < Be < C < B < N
3. Li < Be < N < B < C
4. Li < Be < B < C < N
Subtopic:  Ionization Energy (IE) |
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Arrange the following elements in increasing order of electro negativity
N, O, F, C, Si
Choose the correct answer from the options given below :

1. Si < C < O < N < F
2. O < F < N < C < Si
3. F < O < N < C < Si
4. Si < C < N < O < F
Subtopic:  Electronegativity |
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Identify the incorrect statement:
1. The oxidation state and coordination number (or covalency) of \(\mathrm{Al}\) in\( \left[\mathrm{AlCl}\left(\mathrm{H}_2 \mathrm{O}\right)_5\right]^{2+} \) are +3 and 6, respectively.
2. \(\mathrm{Na}_2 \mathrm{O}\) is a basic oxide and \(\mathrm{Cl}_2 \mathrm{O}_7\) is an acidic oxide
3. The following four species are called isoelectronic species: \( \mathrm{O}^{2-}, \mathrm{F}^{-}, \mathrm{Na}^{+} \mathrm{and}~ \mathrm{Mg}^{2+}\)
4. Among the four species \(\mathrm{Mg}, \mathrm{Al}, \mathrm{Mg}^{2+}\) and \(\mathrm{A l^{3+},}\) the smallest one is \(\mathrm{Al}.\)
Subtopic:  Ionization Energy (IE) |
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Match List-I with List-II :
List-I
(IUPAC official name)
List-II
(IUPAC Symbol)
A. Mendelevium I. Mt
B. Meitnerium II. Mc
C. Moscovium III. No
D. Nobelium IV. Md
Choose the correct answer from the options given below:

1. A-III, B-I, C-II, D-IV
2. A-IV, B-II, C-I, D-III
3. A-IV, B-I, C-II, D-III
4. A-I, B-IV, C-II, D-III
Subtopic:  Modern Periodic Table & Periodicity |
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The correct decreasing order of atomic radii (pm) of Li, Be, B and C is:

1. Be > Li > B > C
2. Li > Be > B > C
3. C > B > Be > Li
4. Li > C > Be > B
Subtopic:  Atomic Size |
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Match List-I with List-II 
List-I
(Block/group in periodic table)
 
List-II
(Element)
A.  Lanthanoid  I.  Ce
B.  d-Block element  II. As
C.  p-Block element  III. Cs
D.  s-Block element  IV.  Mn
Choose the correct answer from the options given below:
1. A-I, B-II, C-IV, D-III
2. A-I, B-IV, C-III, D-II
3. A-I, B-IV, C-II, D-III
4. A-IV, B-I, C-II, D-III
Subtopic:  Modern Periodic Table & Periodicity |
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The element expected to form the largest ion to achieve the nearest noble gas configuration is: 
1. Na  2.
3. 4. N
Subtopic:  Atomic Size |
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Which one of the following represents all isoelectronic species? 
1. \(\mathrm{Na^+ , Cl^-, O^- , NO^+}\)
2. \(\mathrm{N_2O, N_2O_4 , NO^+, NO}\)
3. \(\mathrm{Na^+ , Mg^{2+} , O^- , F^-}\)
4. \(\mathrm{Ca^{2+} , Ar, K^+, Cl^-}\)
Subtopic:  Ionization Energy (IE) |
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Which of the following pair is correctly matched?

1. Basic oxides - \(\mathrm{In_2O_3 , K_2O , SnO_2}\)
2. Neutral oxides - \(\mathrm{CO, NO_2, N_2O}\)
3. Acidic oxides - \(\mathrm{Mn_2O_7, SO_2, TeO_3}\)
4. Amphoteric oxides -\(\mathrm{BeO , Ga_2O_3 , GeO }\)
Subtopic:  Nature of Compound |
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The correct sequence given below contains neutral, acidic, basic, and amphoteric oxide each, respectively is:
 
1. NO, ZnO, CO2, CaO  2. ZnO, NO, CaO, CO
3. NO, CO2, ZnO, CaO 4. NO, CO2, CaO, ZnO
Subtopic:  Nature of Compound |
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