But-1-en-3-yne  contains:
1. 6σ and 3π bonds 2. 7σ and 2π bonds
3. 7σ and 3π bonds 4. 5σ and 3π bonds

Subtopic:  Hybridisation |
 86%
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The molecular geometry of XeF5⁺ will be:
1. Square pyramidal 
2. Square planar 
3. Trigonal bipyramidal 
4. Octahedral 
Subtopic:  Hybridisation |
 70%
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Assertion (A): C3O2 is a linear structure.
Reason (R): Each C atom in C3O2 is sp hybridized.

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:  Hybridisation |
 76%
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Identify the  incorrect statement among the following options:
 
1.  \(O^+_2\) ion is diamagnetic.
2. The bond orders of \(O_2^{+},O_2,O^-_2\) and \(O_2^{2-}\) are 2.5, 2, 1.5, and 1, respectively.
3.  \(C_2\) molecule has four electrons in its two degenerate \(\pi \) molecular orbitals.
4.  \(H^+_2 \) ion has one electron.
Subtopic:  M.O.T |
 79%
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Amongst the following, which one will have maximum 'lone pair - lone pair' electron repulsions? 

1. \(\mathrm{XeF_2}\)
2. \(\mathrm{CIF_3}\)
3. \(\mathrm{IF_5}\)
4. \(\mathrm{SF_4}\)
Subtopic:  V.S.E.P.R & V.B.T |
 76%
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Which one of the following is the correct order of decreasing bond enthalpies for the given species?
1. \(\mathrm {O^{2-}_2>O^-_2>O_2>N_2 }\)
2. \(\mathrm {N_2>O_2>O^{2-}_2>O^-_2 }\)
3. \(\mathrm {N_2>O_2>O^-_2>O^{2-}_2 }\)
4. \(\mathrm {O_2>N_2>O^-_2>O^{2-}_2 }\)

Subtopic:  M.O.T |
 74%
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Match the molecules in Column-I with their corresponding molecular shapes in Column-II.
Column-I
(Molecule)
Column-II
(Shape)
(i) BF3 (a) T-shape
(ii) SF4 (b) Square planar
(iii) XeF4 (c) See-saw
(iv) ClF3 (d) Trigonal planar
Choose the correct matching sequence:
(i) (ii) (iii) (iv)
1. d c b a
2. a b c d
3. d a c d
4. b c d a
Subtopic:  V.S.E.P.R & V.B.T |
 85%
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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.
 
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 |
 71%
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Which among the following ions is the most polarizable?
1. F 2. I
3. Na+ 4. Cl
Subtopic:  Acidic, Basic Character & Fajan's Rule |
 60%
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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 |
 55%
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