NEET Questions - Chemistry - Basic Principles of Orgainc Chemistry

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Which type of bond can carbon form?

ionic
covalent
metallic
vanderwals

Why carbon cannot form $ C ^{ +4} $ or $ C^{-4} $ ion?

require high ionization enthalpy
require high electron gain enthalpy
both a and b
High electron negativity

In which state C can show tetra valency ?

ground state
transition state
excited state
all the above

Which molecule all the least C-C distance ?

$ C_2 H_6 $
$ C_2 H_4 $
$ C_2 H_2 $
$ C_4 H_8 $

What is the value of C – C bond length in ethyne ?

154 pm
139 pm
134 pm
120 pm

In $ C_6H_6 and C_2H_4$ , the 3H - C - H and are respectively __________

$ 120 ^\circ, 120 ^\circ $
$ 120 ^\circ, 90 ^\circ $
$ 120 ^\circ, 109 ^\circ 28' $
$ 180 ^\circ, 190 ^\circ 28' $

The compound in which carbon uses only its sp3 hybrid orbitals for bond formation is

HCOOH
$ (NH_2)_2 CO $
$ (CH_3)_3 COH $
$ (CH_3)_3 CHO $

When the hybridization state of carbon changes from $sp^3 to sp^2$ and finally to sp, the angle between the hybridized orbitals

decreases
increases and decreases
is not affected
increases progressively

What is the general formula of Homologus series

$C_n H_{2n+1} H $
$C_n H_{2n-1} H $
$C_n H_{2n} H $
$C_n H_{2n+2} H $

In homologus series what is the difference in amu?

12
14
16
18

As number of C atom in homologus series increases Then which of the following will increases?

B.P/M.P
solubility
density
all

Which of the following exist in gas and liquid State?

ethane
propane
butane
pentane

Among the following, which is not an example of a homologous series ?

$CH_3OH, CH_3CH_2OH, CH_3CH_3CH_3OH$
$CH_4 , C_2H_6 , C_3H_8, C_4H_{10}$
$ CH_3CHO, CH_3CH_2CHO, CH_3CH_2CH_2CHO$
$CH_3COOH, CH_3COOCH_3, CH_3COOCH_2CH_3$

In homologous series :

Molecular formula is same
Structural formula is same
Physical properties are same
General formula is same

Which of the following is the first member of ester homologous series ?

Ethyl ethanoate
Methyl ethanoate
Methyl methanoate
Ethyl methanoate

NEET Chemistry Questions: Basic Principles of Orgainc Chemistry