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101.

Tischenko reaction yields ester in the presence of catalyst which isA. `LiAlH_(4)`B. N-BromosuccinamideC. `Al(OC_(2)H_(5))_(3)`D. `ZnHg//HCl`

Answer» Correct Answer - C
`2CH_(3)CHO overset(Al(OC_(2)H_(5))_(3))toCH_(3)CH_(2)OH +CH_(3)COOHto underset("Ethylacetate")(CH_(3)COOC_(2)H_(5))+H_(2)O`
Discussion
102.

Urea can be tested byA. Benedict testB. Mulliken testC. NinhydrinD. Biuret test

Answer» Correct Answer - D
Discussion
103.

The end product B in the sequence of reactions `R-X overset(CN^(-))to A overset(NaOH)toB` isA. An alkaneB. A carboxylic acidC. Sodium saltof carboxylic acidD. A ketone

Answer» Correct Answer - C
`R-X overset(KCN)toR-CN underset(H_(2)O)overset(NaOH)toR-COONa+NH_(3)`
Discussion
104.

Name the end product in the following series of reaction `CH_(3)COOH overset(NH_(3))toA underset(P_(2)O_(5)) overset(Delta)toB`A. `CH_(4)`B. `CH_(3)OH`C. AcetonitrileD. Ammonium acetate

Answer» Correct Answer - C
`CH_(3)COOH overset(NH_(3))to CH_(3)CONH_(2) underset(P_(2)O_(5))overset(Delta)toCH_(3)C-=N`
Discussion
105.

What are A,B,C in the following reactions, (i) `(CH_(3)CO_(2))_(2)Ca overset(Delta)toA` (ii) `CH_(3)CO_(2)H underset("red P") overset(HI)toB` (iii) `2CH_(3)CO_(2)H overset(P_(4)O_(10))toC`A. `A-C_(2)H_(6)`, `B-CH_(3)COCH_(3)`,`C-(CH_(3)CO)_(2)O`B. `A-(CH_(3)CO)_(2)O,B-C_(2)H_(6),C-CH_(3)COCH_(3)`C. `A-CH_(3)COCH_(3),B-C_(2)H_(6),C-(CH_(3)CO)_(2)O`D. `A-CH_(3)COCH_(3),B-(CH_(3)CO)_(2)O,C-C_(2)H_(6)`

Answer» Correct Answer - C
Discussion
106.

The reagent which does not give acid chloride on treating with a carboxylic acid isA. `PCl_(5)`B. `Cl_(2)`C. `SOCl_(2)`D. `PCl_(3)`

Answer» Correct Answer - B
`CH_(3)COOH+Cl_(2)toCH_(2)ClCOOH+HCl`
`CH_(3)COOH+PCl_(5)toCH_(3)COCl+POCl_(3)+HCl`
`CH_(3)COOH+SOCl_(2)toCH_(3)COCl+SO_(2)+HCl`
`3CH_(2)COOH+PCl_(3)to3CH_(3)COCl+H_(3)PO_(3)`.
Discussion
107.

The compound which is not formed during the dry distillation of mixture of calcium formate and calcium acetate isA. PropanalB. PropanoneC. EthanalD. Methanal

Answer» Correct Answer - A
The following compound are obtained when a mixture of calcium formate and calcium acetate are subjected to dry distillation:
`underset("Calcium acetate")((HCOO)_(2))Ca overset(Delta)to underset("Methanal")(HCHO)+CaCO_(3)`
`underset("Calcium acetate")((CH_(3)COO)_(2))Ca overset(Delta)tounderset("Propanone")(CH_(3)COCH_(2))+CaCO_(3)`
`(HCOO)_(2)Ca+(CH_(3)COO)_(2)Ca overset(Delta)to underset("Ethanal")(2CH_(3)CHO)+CaCO_(3)`
thus, only propanal is not formed.
Discussion
108.

Reaction between an acid and alcohol will giveA. Higher C containing acidB. Secondary alcoholC. AlkaneD. Ester

Answer» Correct Answer - D
Discussion
109.

The reagent used for protection of amino group during the nitration of aniline isA. `SOCl_(2)//`PyridineB. `PCl_(5)`C. Acetic acidD. Acetic anhydride

Answer» Correct Answer - D
Discussion
110.

The gas evolved on heating alkali formate with sodalime isA. `CO`B. `CO_(2)`C. HydrogenD. Water vapour

Answer» Correct Answer - C
The gas evolved on heating alkali formate with soda lime is hydrogen.
`HCOONa+NaOH underset(Delta)overset(CaO)toH_(2)+Na_(2)CO_(3)`
Discussion
111.

The reaction of ethyl formate with excess of `CH_(3)MgI` followed by hydrolysis givesA. n-propyl alcoholB. EthanalC. PropanalD. Isopropyl alcohol

Answer» Correct Answer - D
Discussion
112.

The acid showing salt-like character in aqueous solution isA. Acetic acidB. Benzoic acidC. Formic acidD. `alpha`-amino acetic acid

Answer» Correct Answer - D
Discussion
113.

The ortho/para directing group among the following isA. COOHB. CNC. `COCH_(3)`D. `NHCOCH_(3)`

Answer» Correct Answer - D
`-COOH and COCH_(3)` are meta directing group due to the presence of `-overset(O)overset(||)(C)-`, similarly -CN is also meta directing due to the presence of multiple bond while `HNCOCH_(3)` is ortho/para directing group because of less electron density over `-overset(O)overset(||)(C)-` group.
Discussion
114.

Test for an ester isA. Biuret testB. Hydroxamic acid testC. Mullicken testD. Liebermann nitroso test

Answer» Correct Answer - B
Hydroxamic acid test is used for an ester.
Discussion
115.

Iodoform test is not given byA. AcetoneB. Ethyl alcoholC. Acetic acidD. None of these

Answer» Correct Answer - C
Iodoform test is given by all the compounds having
`CH_(3)-underset(O)underset(||)(C)-` or `CH_(3)-underset(OH)underset(|)(C)-` group.
Discussion
116.

When `CH_(2)=CH -CO OH` is reduced with `LiAlH_(4)` the compound obtained will beA. `CH_(3)-CH_(2)-COOH`B. `CH_(2)=CH-CH_(2)OH`C. `CH_(3)-CH_(2)-CH_(2)OH`D. `CH_(3)-CH_(2)-CHO`

Answer» Correct Answer - B
`CH_(2)=CH-COOH overset(LiAlH_(4))toCH_(2)=CH-CH_(2)OH+H_(2)O`
Discussion
117.

Pyruvic acid is obtained byA. Oxidation of acetaldehyde cyanohydrinB. Oxidation of acetone cyanohydrinC. Oxidation of formaldehyde cyanohydrinD. None of these

Answer» Correct Answer - A
`CH_(3)-underset(O)underset(||)(C)-H+HCNtoCH_(3)-underset(OH)underset(|)overset(CN)overset(|)(C)-H overset(H_(2)O)toCH_(3)-underset(OH)underset(|)(C)H-COOH overset([O])toCH_(3)-underset(O)underset(||)(C)-COOH`
Discussion