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The molecules that have an overall permanent dipole moment among the following is/are:
(A) CO₂
(B) H₂O
(C) NH₃

1.	A and C only	2.	C and B only
3.	A, B, and C	4.	None of these

Subtopic: Polarity |

82%

Level 1: 80%+

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Q2:

Which of the following molecules contain bond angles of 180° in their gaseous states?
(Atomic numbers: H = 1; Be = 4; C = 6; Cl = 17)

A. BeCl₂
B. C₂H₂
C. CCl₄

1.	A and C only	2.	A and B only
3.	A only	4.	B and C only

Subtopic: V.S.E.P.R & V.B.T |

78%

Level 2: 60%+

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Q3:

The sum of the number of lone pairs in a central atom in $IF_5 $ and $IF_7 $ is:

1. 2
2. 0
3. 1
4. 3

Subtopic: V.S.E.P.R & V.B.T |

87%

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Q4:

Which of the following molecules have unequal bonds?

1. $C l F_{3}$

2. $B F_{3}$

3. $A l F_{3}$

4. $N F_{3}$

Subtopic: V.S.E.P.R & V.B.T |

74%

Level 2: 60%+

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4

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Q5:

Decreasing order of stability of $O_{2}, O_{2}^{-}, O_{2}^{+} and O_{2}^{2 -}$ is:

1. $O_{2}^{+} > O_{2} > O_{2}^{-} > O_{2}^{2 -}$

2. $O_{2}^{2 -} > O_{2}^{-} > O_{2} > O_{2}^{+}$

3. $O_{2} > O_{2}^{+} > O_{2}^{2 -} > O_{2}^{-}$

4. $O_{2}^{-} > O_{2}^{2 -} > O_{2}^{+} > O_{2}$

Subtopic: M.O.T |

80%

Level 1: 80%+

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Q6:

Compound in which central atom assumes sp³d hybridisation is

1. SO₃

2. PCl₅

3. SO₂

4. PCl₃

Subtopic: Hybridisation |

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Q7:

Assertion (A):	Sigma ($\sigma$) bond is strong, while pi ($\pi$) bond is weak.
Reason (R):	Atoms rotate freely about pi ($\pi$) bond.

1.	Both (A) and (R) are true and (R) is the correct explanation of (A).
2.	Both (A) and (R) are true but (R) is not the correct explanation of (A).
3.	(A) is true but (R) is false.
4.	Both (A) and (R) are false.

Subtopic: Types of Chemical Bond |

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Q8:

Which compound among the following represents an expanded octet?
1. $\text{BeH}_2 $
2. $\text{LiCl}$
3. $\text{H}_2\text{SO}_4 $
4. $\text{NO} $

Subtopic: Resonance & Nature of Compounds |

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Q9:

Which among the following ions is the most polarizable?

1.	F^–	2.	I^–
3.	Na⁺	4.	Cl^–

Subtopic: Acidic, Basic Character & Fajan's Rule |

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Q10:

If an extra electron is added to the hypothetical molecule C₂, this extra electron will occupy the molecular orbital:

1. $\pi_{2p}$*
2. $\pi_{2p}$
3. $\sigma_{2p}$*
4. $\sigma_{2p}$

Subtopic: M.O.T |

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Level 3: 35%-60%

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Assertion (A):	Sigma (\(\sigma\)) bond is strong, while pi (\(\pi\)) bond is weak.
Reason (R):	Atoms rotate freely about pi (\(\pi\)) bond.

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