In the hydrocarbon

     CH3-CH=CH-CH2-CCH

     6      5     4   3      2    1

The state of hybridisation of carbons 1,3 and 5 are in the following sequence

(1) sp2, sp, sp3                       

(2) sp, sp3, sp2

(3) sp, sp2, sp3                       

(4) sp3, sp2, sp

Subtopic:  Hybridisation |
 84%
NEET - 2008
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The correct order of increasing thermal stability of K2CO3, MgCO3, CaCO3 and BeCOis:
(1) BeCO3 < MgCO3 < K2CO< CaCO3

(2) BeCO3 < MgCO3 < CaCO3 < K2CO3

(3) MgCO3 < BeCO3 < CaCO3 < K2CO3

(4) K2CO3 < MgCO3 < CaCO3 < BeCO3

Subtopic:  Lattice & Hydration Energy |
 59%
NEET - 2007
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Hints

Which among the following compounds has higher hydration energy than the lattice energy?

1. BaSO4                           

2. MgSO4

3. CaSO4                           

4. SrSO4

Subtopic:  Lattice & Hydration Energy |
 62%
From NCERT
NEET - 2007
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Links
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NEET 2023 - Target Batch - Aryan Raj Singh

In which of the following molecules are all the bonds not equal ?

(1) ClF3

(2) BF3

(3) AlF3

(4) NF3

Subtopic:  Hybridisation |
 65%
From NCERT
NEET - 2006
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The electronegativity difference between N and F is greater than that between N and H yet the dipole moment of NH3 (1.5 D) is larger than that of NF3 (0.2 D). This is because:

(1) in NH3 as well as in NF3 the atomic dipole and bond dipole are in the same direction
(2) in NH3 the atomic dipole and bond dipole are in the same direction whereas in NFthese are in opposite directions
(3) in NH3 as well as NF3 the atomic dipole and bond dipole are in opposite directions
(4) in NH3 the atomic dipole and bond dipole are in the opposite directions whereas in NF3 these are in the same directions

Subtopic:  Polarity |
 82%
From NCERT
NEET - 2006
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The correct order of electronegativity of hybrid orbitals of carbon is:

(1) sp>sp2<sp3             

(2) sp>sp2>sp3

(3) sp<sp2>sp3             

(4) sp<sp2<sp3

Subtopic:  Hybridisation |
 78%
NEET - 2006
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Which of the following species has a linear shape?

(1) NO2-

(2) SO2

(3) NO2+

(4) O3

Subtopic:  Hybridisation |
 71%
NEET - 2006
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Which of the following is the most basic oxide?
(1) Al2O3

(2) Sb2O3

(3) Bi2O3

(4) SeO2

Subtopic:  Acidic, Basic Character & Fajan's Rule |
 57%
NEET - 2006
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Hints

Which of the following is not a correct statement?

(1) The electron-deficient molecules can act as Lewis acids

(2) The canonical structures have no real existence

(3) Every AB5 molecule does, in fact, have square pyramid structure

(4) Multiple bonds are always shorter than corresponding single bonds

Subtopic:  Hybridisation |
 78%
NEET - 2006
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The number unpaired electrons in a paramagnetic diatomic molecule of an element with atomic number 16 is :

1. 2

2. 3

3. 4

4. 1

Subtopic:  M.O.T |
 75%
From NCERT
NEET - 2006
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