221. $$HBr$$  reacts fastest with :

A $${\text{2 - methylpropan - 2 - ol}}$$
B $${\text{propan - 1 - ol}}$$
C $${\text{propan - 2 - ol}}$$
D $${\text{2 - methylpropan - 1 - ol}}$$
Answer :   $${\text{2 - methylpropan - 2 - ol}}$$
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222. The general molecular formula, which represents the homologous series of alkanols is

A $${C_n}{H_{2n}}{O_2}$$
B $${C_n}{H_{2n}}O$$
C $${C_n}{H_{2n + 1}}O$$
D $${C_n}{H_{2n + 2}}O$$
Answer :   $${C_n}{H_{2n + 2}}O$$
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223. Which of the following has lowest boiling point ?

A $$p$$ - Nitrophenol
B $$m$$ - Nitrophenol
C $$o$$ - Nitrophenol
D Phenol
Answer :   $$o$$ - Nitrophenol
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224. Propanone on reaction with alkyl magnesium bromide followed by hydrolysis will produce

A primary alcohol
B secondary alcohol
C tertiary alcohol
D carboxylic acid
Answer :   tertiary alcohol
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225. $$R - OH + HX \to RX + {H_2}O$$
In the above reaction, the reactivity of alcohols is

A tertiary > secondary > primary
B tertiary < secondary < primary
C tertiary > primary > secondary
D secondary > primary > tertiary
Answer :   tertiary > secondary > primary
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226. One mole of ethyl acetate on treatment with an excess of $$LiAl{H_4}$$  in dry ether and subsequent acidification produces

A $$1\,mol$$  acetic acid $$ +\, \,1\,mol$$   ethyl alcohol
B $$1\,mol$$  ethyl alcohol $$ + \,\,1\,mol$$   methyl alcohol
C $$2\,moles$$   of ethyl alcohol
D $$1\,mol$$  of $$2$$-butanol
Answer :   $$2\,moles$$   of ethyl alcohol
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227. Phenol, when it first reacts with concentrated sulphuric acid and then with concentrated nitric acid, gives

A 2, 4, 6 - trinitrobenzene
B $$o$$ - nitrophenol
C $$p$$ - nitrophenol
D nitrobenzene
Answer :   $$o$$ - nitrophenol
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228. The $$C-O-H$$   bond angle in alcohols is slightly less than the tetrahedral angle whereas the $$C-O-C$$   bond angle in ether is slightly greater because

A of repulsion between the two bulky $$R$$  groups.
B $$O$$ atom in both alcohols and ethers is $$s{p^3}$$ - hybridised.
C lone pair - lone pair repulsion is greater than bond pair - bond pair repulsion.
D None of these.
Answer :   of repulsion between the two bulky $$R$$  groups.
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229. Which of the following is phenol?

A Cresol
B Catechol
C Benzenol
D All of these
Answer :   All of these
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230. Which of the following statements is not correct about methanol?

A It is used for drinking purposes.
B It is highly poisonous compound.
C It can be prepared by reduction of formaldehyde with $$LiAl{H_4}.$$
D It is miscible with water in all proportions.
Answer :   It is used for drinking purposes.
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