Tiêu đề 11. ALCOHOLS, PHENOLS AND ETHERS.pdf ✅

(1.) Which of the following compound is formed when a hydrogen atom in an aliphatic hydrocarbon is replaced by OH group? [Page: 323] (a) Alcohol (b) Phenol (c) Ether (d) Aldehyde (2.) Ordinary spirit used for polishing wooden furniture contains [Page: 323] (a) Methanol (b) Propanol (c) Ethanol (d) Butanol (3.) The substitution of a hydrogen atom in a hydrocarbon by an alkoxy group yields another class of compounds known as [Page: 323] (a) Ethers (b) Alcohol (c) Phenol (d) aldehyde (4.) Which of the following is the basis of the classification for alcohols and phenols? [Page: 324] (a) On the basis of one, two, three or many hydroxyl group in structure. (b) On the basis of hybridisation of the carbon atom to which hydroxyl group is attached. (c) Both (a) and (b) (d) On the basis of the carbon atom or benzene ring. (5.) Which of the following is a tertiary alcohol? [Page: 324] (a) CH OH 2 − (b) (c) (d) (6.) Consider the following compounds. [NCERT Exemplar, Page: 325] The aromatic alcohols are (a) I, II, III and IV (b) I and IV (c) II and III (d) I (7.) Consider the following compound [Page: 325]
The OH group attached to carbon atom is an (a) allylic carbon (b) vinylic carbon (c) benzylic carbon (d) aliphatic carbon (8.) The given alcohol is CH CH OH 2 = − is [Page: 325] (a) vinylic alcohol (b) allylic alcohol (c) benzylic alcohol (d) alkylic alcohol (9.) An alcohol (x) with formula C H O 4 10 . How many alcohols with same formula are chiral in nature? [NCERT Exemplar, Page: 325] (a) 1 (b) 2 (c) 3 (d) 4 (10.) Which of the following is a symmetrical ether? [Page: 325] (a) CH OC H 3 2 5 (b) C H OC H 2 5 3 7 (c) C H OC H 2 5 2 5 (d) C H OC H 2 5 6 5 (11.) Which of the following statement is incorrect? [Page: 326] (a) According to IUPAC, the name of an alcohol is derived from name of the alkane from which alcohol is derived (b) In IUPAC, the alkane of ‘e’ is substituted with the suffix ‘ol’. (c) The position of substituents are indicated by numerals. (d) For naming polyhydric alcohols, the ‘e’ of alkane is substituted by –ol. (12.) Match of the following. [Page: 326] Column I Column II (A) (p) 2-methylpropan-2-ol
(B) (q) propan-2-ol (C) (r) propane-1,2,3–triol (D) (s) 2-methylpropan-1-ol Codes A B C D (a) p q r s (b) q s p r (c) r s q p (d) q p r s (13.) Which of the following structure represents catechol? [Page: 327] (a) (b) (c) (d) (14.) The correct structure of phenyl isopentyl ether is [Page: 327] (a) CH OCH CH OCH 3 2 2 3 (b) ( ) 6 5 2 3 6 C H O CH CH (c) C H OCH CH CHCH CH 6 5 2 2 3 3 (d) C H OCH CH 6 5 2 3 (15.) Which of the following is incorrect match? [Page: 327] (a) C H OC H 2 5 2 5 ethoxyethane (b) C H OCH 6 5 3 methoxybenzene (c) C H OCH CH 6 5 2 3 ethoxybenzene (d) CH O CHCH CH 3 3 3 − 1-methoxypropane
(16.) Which of the following statement is correct? [Page: 326-327] (a) The simplest hydroxy derivative of benzene is 2-methylphenol. (b) In case of phenol, the substituted compounds are termed as ortho, meta and para. (c) Trihydroxy derivatives of benzene are known as 1,2-, 1,3- and 1,4-benzenediol. (d) In case of ethers, alkyl or aryl groups are written in alphabetical order and adding the word ether. (17.) Match of the following. [NCERT Exemplar, Page: 327] Column I Column II (Compound) (Name) (I) p. 2-methoxypropane (II) q. o-cresol (III) r. m-cresol Codes I II III (a) p q r (b) r q p (c) r p q (d) q r p (18.) The bond angle in alcohols is slightly less than the tetrahedral angle. It is due to [Page: 328] (a) the repulsion between the unshared election pair of oxygen (b) the attraction between the unshared electron pair of oxygen (c) the repulsion between the shared electron pair oxygen (d) the attraction between the shared electron pair of oxygen (19.) The carbon–oxygen bond length in phenol is slightly less than that in methanol. This is due to [Page: 328] (a) partial double bond character on account of conjugation (b) sp2 hydridised state of carbon to which oxygen is attached