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The IUPAC name of CH₃-CH=CH-COOH is:

But-2-en-1-oic acid

But-1-en-oic acid

But-2-en-1-carboxylic acid

Propene-1-carboxylic acid

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The IUPAC name of CH3 -CHOH- CH₂- CO-CH₃ is:

2-Hydroxypentan-4-one

4-Hydroxypentan-2-one

4-oxopentan-2-ol

2-oxopentan-4-ol

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Explanation

The key functional groups are the alcohol (-OH) at carbon 4 and the ketone (>C=O) at carbon 2. The longest carbon chain is 5, so the root name is 'pentan'. The '4-hydroxy' prefix indicates the alcohol group at carbon 4, and the '2-one' suffix indicates the ketone group at carbon 2.

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The IUPAC name ofCH₃ — CH₂— ${C_{|}^{|}}_{OH}^{Br} - \overset{Cl}{\overset{|}{CH}}$ — CH₂- Cl is:

3-Bromo-4, 5-dichloropentan-3-ol

3-Bromo-1, 2-dichloro-3-hydroxypentane

3-Bromo-1, 2-dichloropentan-3-ol

3-Bromo-4, 5-dichloro-3-hydroxypentane

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Explanation

The longest carbon chain is 5, so the root name is 'pentan'. The '3-bromo' prefix indicates the bromine atom at carbon 3. The '1,2-dichloro' prefix indicates the chlorine atoms at carbons 1 and 2. The '3-ol' suffix indicates the alcohol (-OH) group at carbon 3.

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The silver sulphate solution is used to separate:

nitrate and bromide

nitrate and chlorate

bromide and iodide

nitrate and nitrite

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Explanation

AgBr is insoluble; AgNO₃ is soluble.

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Soda extract is prepared by:

fusing soda and mixture and, then extracted with water

dissolving NaHCO₃ and mixture in dil. HCl

boiling Na₂CO₃ and mixture in dil.HCl

boiling Na₂CO₃ and mixture in distilled water

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Explanation

(d) It is the process to prepare soda extract.

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The compound which forms one monochloro product when treated with chlorine is:

n-pentane

isopentane

neo-pentane

none of these

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Explanation

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The electromeric effect in organic compounds is a

temporary effect

permanent effect

temporary-permanent effect

none of the above

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Which of the following contains only three pairs of electrons?

Carbocation

Carbanion

Free radical

None of these

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Electrophiles are:

electron loving species

electron hating species

nucleus loving reagents

nucleus hating reagents

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Explanation

(a) Electrophiles are electron deficient species which can share lone pair of electron with carbonion and are thus, called Lewis acids.

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Nucleophiles are:

electron loving

electron hating

nucleus loving

nucleus hating

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Explanation

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