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Transcript
Merit Students SEEE Time: 1 Hr. Class: XII - Chemistry Total Marks: 25 ______________________________________________________________________________ Q 1: Molecular formula of BHA is ) a C11H20O2 b C14H14O Q 6: Which of the following compound having maximum ) hydrogen bonding? ) ) c C8H16O2 d C11H16O2 a dimethyl ether b ethyl bromide ) ) ) ) Q 2: When propene is reacted with HBr in the presence of c ethyl chloride d ethyl alcohol peroxide, the species first attack on propene is ) a Q 7: Methanal is very reactive than any other carbonyl b ) ) ) compounds because of c d a ) ) ) Q 3: The reaction of t-butyl chloride and sodium ethoxide c gives mainly ) a t-butyl ethyl ether b 2-methyl 1-propene ) ) Absence of -hydrogen b ) Absence of -carbon Absence of alkyl group on carbonyl carbon d Presence of >C=O group ) c 2-2-dimethyl butane d isopropyl n-propyl ether Q 8: Formation of chloroform from ethyl alcohol and ) bleaching powder does not involve ) Q 4: From the following which is / are correct a oxidation b halogenation statement( s) ? ) ( A) In alcohols - OH group always present at the end of the chain. ( B) Alcohols may contain one or more groups. ( C) butane-1-ol has higher boiling point than 2-methyl ) c reduction d none of the above ) ) Q 9: Aldehyde and ketone can be distinguished form one another by propane -2 - ol a hydroxylamine b phenylhydrazine ( D) Alcohols are isomers of ethers. ) a Only A b A, B, C c aldol condensation d Clemmensen's reduction ) ) ) ) ) c only B, C, D d All of the above Q 10: Bimolecular reduction of acetone with magnesium ) metal gives: ) Q 5: The group of methyl alcohol cannot be replaced a Diacetone amine b Diacetone alcohol by chlorine by the action of ) a chlorine b hydrogen chloride c Iso-propyl alcohol d Pinacol ) ) ) c phosphorous trichloride d phosphorus pentachloride ) ) Q 11: Tollen's reagent test for aldehydes, involves the ______________________________________________________________________________ Contact No : 9766616435 Page 1 of 3 a ) c ) d ) oxidation of group hydration of b ) reduction of ) group c ) group high reactivity of -hydrogen d hydrogen bonding elimination of ) group Q 16: The general formula of a carboxylic ester can be Q 12: Some statement are given below: written as ( A) Fatty acids can decompose alkali carbonates a CnH2nO2 b CnH2nO ( B) Acetic acid on distillation with P2O5 undergoes ) dehydration ) c CnH2n+2O2 d CnH2n+1O2 ( C) Sodium formate can not give silver mirror test ) ( D) Formic ester can be used to prepare an aldehyde ) employing Grignard's reagent. Q 17: Of the following four reactions, formic acid and acetic Among the above, the correct statements are acid differ in which respect a A, B and D only a b A and B only ) ) ) c A, C and D only b d all ) ) ) Q 13: Which one of the following gives a test which is c common to an aldehyde? ) formation of ester with alcohol reduction of Fehling solution d blue litmus reaction a methanoic acid b ethanoic acid ) replacement of hydrogen by sodium ) ) c propionic acid d none of these Q 18: Which of the following statements is not applicable to ) carboxylic acids ? ) Q 14: Two molecules of an aldehyde having a They are polar molecules -hydrogen atom condense in presence of aqueous Na2CO3 to give - ) hydroxyl aldehyd. The reaction is named as, b a Wurtz reaction b Cannizzaro's rection ) ) c ) They are weaker acids than mineral acids They form intermolecular hydrogen bonds c Aldol condensation d Clasien's condensation ) ) d They have lower boiling points than the corresponding ) Q 15: What is the main reason of the fact that carboxylic ) alcohols & aldehydes and ketones acids can undergo ionization? Q 19: Which of the following amine does not respond to a carbylamine reaction ? ) absence of -hydrogen atoms b resonance of stabilization of a ethylamine b ( CH3) ) 2 ) NH ______________________________________________________________________________ Contact No : 9766616435 Page 2 of 3 c CH3NH2 d phenyl amine ) ) b ) Q 20: Phenyl amine is obtained by reduction of which one ) of the following ? c a nitrobenzene b benzonitrile ) ) ) d c benzaldoxime d chlorobenzene ) ) they have same configuration of 5d1, 6s2 they are similar in their properties they belong to same transition series ) Q 21: The monovalent RO group is called a alkyl group b alkoxy group ) ) c allyl group d all of these ) ) Q 22: The number of asymmetric carbon atoms in the molecules of osazone is a 2 b3 ) ) c 4 d5 ) ) Q 23: Oxidation product of glucose with Br2 water is a gluconic acid b saccharic acid ) ) c CO2 ) d ) bromo derivative of glucose Q 24: The fibre of dacron blended with cotton fibre is called a terywool b terycot ) ) c perlon d semi-synthetic fibre ) ) Q 25: For lanthanides the most common oxidation state is +3 because a they have same configuration of 5d and 6s ______________________________________________________________________________ Contact No : 9766616435 Page 3 of 3