Which of the following is a paramagnetic compound?

1. N2

2. H2

3. Li2

4. O2

Subtopic:  M.O.T |
 84%
From NCERT
NEET - 2019
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Which of the following is the correct order of dipole moment for the species given?

1. NH3<BF3<NF3<H2O

2. BF3<NF3<NH3<H2O

3. BF3<NH3<NF3<H2O

4. H2O<NF3<NH3<BF3

Subtopic:  Polarity |
 74%
From NCERT
NEET - 2019
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The number of hydrogen bonded water molecules(s) associated with CuSO4.5H2O is-

1. 3

2. 1

3. 2

4. 5

Subtopic:  van der Waal Force & Hydrogen Bonding |
 58%
From NCERT
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 |
From NCERT
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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 |
 67%
From NCERT
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molecular shapes of SF4, CF4 and XeF4 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%
From NCERT
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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%
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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 |
 79%
From NCERT
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 |
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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%
From NCERT
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