Which of the following is a paramagnetic compound?

1. N2

2. H2

3. Li2

4. O2

Subtopic:  M.O.T |
 86%
Level 1: 80%+
NEET - 2019
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Arrange the following species in increasing order of their dipole moments:
NH3,NF3,BF3,H2O
 

1. NH3<BF3<NF3<H2O

2. BF3<NF3<NH3<H2O

3. BF3<NH3<NF3<H2O

4. H2O<NF3<NH3<BF3

Subtopic:  Polarity |
 75%
Level 2: 60%+
NEET - 2019
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The number of hydrogen bonded water molecules(s) associated with \(\mathrm{C u S O_{4} . 5 H_{2} O}\) is:

1. 3 2. 1
3. 2 4. 5
Subtopic:  van der Waal Force & Hydrogen Bonding |
 54%
Level 3: 35%-60%
NEET - 2019
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Which of the following atomic orbitals would have the greatest overlap to form the strongest covalent bond?

1. 2s-2s (σ) 2. 2s-2p (σ)
3. 2p-2p (π) 4. 2p-2p (σ)
Subtopic:  Covalent Bond |
Level 3: 35%-60%
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 The 'S' atom among the following that does not have \(\mathrm{sp}^3\) hybridization is

1. \(\mathrm{SO}^{2-}_4\) 2. \(\mathrm{SF}_4\)
3. \(\mathrm{SF}_2\) 4. \(\mathrm{S}_8\)
Subtopic:  Hybridisation |
 68%
Level 2: 60%+
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molecular shapes of SF4,CF4andXeF4 are 

1.  Same with 2, 0 and 1 lone pairs of electrons respectively

2.  The same with 1, 1 and 1 lone pairs of electrons respectively 

3.  Different with 0, 1 and 2 lone pairs of electrons respectively 

4.  Different with 1, 0 and 2 lone pairs of electrons respectively

Subtopic:  Hybridisation | V.S.E.P.R & V.B.T |
 88%
Level 1: 80%+
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The bond order depends on the number of electrons in the bonding and antibonding orbitals.

Which of the following statements are correct about bond order?

1.  Bond order can have a negative value.

2.  It always has an integral value.

3.  It is always  a non zero quantity

4.  It can assume any value-positive or fractional, including zero.

Subtopic:  Types of Chemical Bond |
 72%
Level 2: 60%+
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Match the oxide given in Column I with its property given in Column II:

Column I Column II
(i) Na2O (a) Neutral
(ii) Al2O3 (b) Basic
(iii) N2O (c) Acidic
(iv) Cl2O7 (d) Amphoteric
 

Which of the following options is correct?

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

Subtopic:  Acidic, Basic Character & Fajan's Rule |
 82%
Level 1: 80%+
NEET - 2019
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The correct statement is

1. When O2 is converted into O2+ then bond distance increases

2. When N2 is converted into N2+ then bond distance increases

3. When CO is converted into CO+ then bond distance increases

4. All of these

Subtopic:  M.O.T |
 50%
Level 3: 35%-60%
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A pair in which both species are not likely to exist is:

1. \(H^+_2,He^{2-}_2\) 2. \(H^-_2,He^{2+}_2\)
3. \(H^{2+}_2,He_2\) 4. \(H^+_2,He^{2+}_2\)
Subtopic:  M.O.T |
 82%
Level 1: 80%+
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