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Which of the following represents the correct order of acidity in the given compounds?

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Explanation

(c) The acidity of halogenated acid increases with increase in electronegativity of the halogen present. So,  the correct order is order is F > Ce >Br

 FCH2COOH > ClCH2COOH > BrCH2COOH > CH3COOH

Ethanol and dimethyl ether form a pair of functional isomers. The boiling point of ethanol is higher than that of dimethyl ether due to the presence of

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Explanation

Ethanol has a hydroxyl (-OH) group that can participate in hydrogen bonding, whereas dimethyl ether does not have any hydrogen atoms attached to highly electronegative atoms. This intermolecular hydrogen bonding in ethanol results in stronger attractive forces, leading to a higher boiling point.

Among the following the strongest acid is                                 

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Explanation

(c) We know that, inductive effect decreases rapidly with distance. Inductance effect distance depending factor. As the distance of Cl-atom increases the acidic character decreases.

The distance between two adjacent carbon atoms is largest in

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Explanation

(c) The C-C bond length is maximum for single bond, so butane have largest C-C bond length because it contains carbon-carbon single bond.

Which of the following represent the correct decreasing order of acidic strength of following? 

(i) Methanoic acid

(ii) Ethanoic acid

(iii) Propanoic acid

(iv) Butanoic acid

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Explanation

The acidic strength of carboxylic acids decreases with an increase in the size of the alkyl group. This is because the larger alkyl groups have a greater electron-releasing or electron-donating effect, which decreases the polarity of the O-H bond, making it less acidic. Therefore, the correct decreasing order of acidic strength is: methanoic acid > ethanoic acid > propanoic acid > butanoic acid.

The relative stability order of carbanions CH≡C-, CH- and CH2=CH- is ____________

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Explanation

As the electronegativity of the atom at which -ve charge is present, the stability of the carbanion also increases. The order is

CHC->CH2=CH->CH3-

 

Trans-2-butene on bromination using CS2 gives which dibromoderivative

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Explanation

Addition of Br2 in alkene is an example of anti addition. Trans alkene on anti addition give meso compound.

Consider the acidity of the following carboxylic acids

(i) PhCOOH

(ii) o-NO2C6H4COOH

(iii) p-NO2C6H4COOH

(iv)m-NO2C6H4COOH

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Explanation

Due to ortho effect, ortho derivative is most acidic. If electron withdrawing group like -NO2 is present in ring then order of acidity is -o>p->m-

Which of the following will have minimum C-Cl bond length?

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Explanation

In Ph-Cl, due to resonance C-Cl bond has partial double bond character and have minimum bond length.

A hydrocarbon (R) has six membered ring in which there is no unsaturation. Two alkyl groups are atttached to the ring adjacent to each other. One group has 3 carbon atoms with branching at 1st carbon atom of chain and another has 4 carbon atoms. The larger alkyl group has main chain of three carbon atoms of which second carbon is substituted. Correct IUPAC name of compound (R) is

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