NEET/IIT JEE model test

The structure of isobutyl group in an organic compound is

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Name of the compound given below

• (a) 2, 3-diethylheptane

• (b) 5-ethyl-6-methyloctane

• (c) 4-ethyl-3-methyloctane

• (d) 3-methyl-4-ethyloctane

For the compound, which of the following IUPAC names is correct?

• (a) 2-methyl-3-ethyl pentane

• (b) 3-ethyl-2-methyl pentane

• (c) 2-ethyl-3-methyl pentane

• (d) 3-methyl-2-ethyl pentane

Which of the following possesses a sp-carbon in its structure?

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Which of the following does not represent the 2 – bromo pentane ?

• (a) (ii), (iii) and (v)

• (b) Only (ii)

• (c) (ii) and (iii)

• d) (iii) and (v)

The IUPAC name of the following compound

• 3-ethyl-5-methylheptane

• 5-ethyl-3-methylheptane

• 3,5-diethylhexane

• 1,1-diethyl-3-methylpentane

Which of the following statement(s) is/are correct?

i)A carbon atom having an sp hybrid orbital is less electronegative than carbon atoms possessing sp² or sp³ hybridised orbitals.

ii)Π-bonds provide the most reactive centres in the molecules containing multiple bonds

iii)The number of σ and π bonds in compound CH₂ =C=CHCH₃ are 7 and 2 respectively

iv)

• (a) (i) and (iii)

• (b) (ii) and (iii)

• (ii) only

• (d) (i) only

In which of the compounds given in the didgram, there is more than one kind of hybridization (sp, sp2 , sp3 ) for carbon?

• (ii)

• (iii) and (iv)

• (i) and (iv)

• (ii) and (iii)

Which of the following represents the given mode of hybridisation sp²–sp² – sp – sp from left to right?

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Triple bond of ethyne is made of

• Three σ – bonds

• Three π – bonds

• Two σ and one π – bond

• Two π and one σ– bond