Explore topic-wise InterviewSolutions in Current Affairs.

This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.

1.

Glucoseor sucroseare solbulein water by cyclohexaneor benzene(simplesix memberedringcompounds ) areinsoluble d in water. Explain .

Answer»


Solution :Glucose andsucrose MOLECULE containmany- OH groupsand henceare capable offormingH - bondwithwatermolecules. On theother hand, CYCLOHEXANE andbenzene arehydrocarbon and hence theycannotformH -bondwithwater . THEREFORE ,glucose AD suroseare solublein waterwherease cyclohexaneand BENZENE areinsoblublein water .
Discussion
2.

Glucose or fructose can be converted into ethanol in presence of

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invertase
ZYMASE
maltase
diastase.

Solution :Zymase ACTS as an ENZYME.
Discussion
3.

Give the structures and IUPAC names of monohydric phenols of molecular formula, C_(7)H_(8)O.

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Solution :Three ISOMERS are possible with the FOLLOWING STRUCTURES :
Discussion
4.

Glucose on treating with excess of phenyl hydrazine gives.

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GLUCONIC acid
Saccharicaed
OSAZONE
SORBITOL

ANSWER :C
Discussion
5.

Give the structures and IUPAC names of monohydric phenols of molecular formula C_(7)H_(8)O.

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SOLUTION :
Discussion
6.

Glucose on reduction with NaBH_(4) gives

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sorbitol
FRUCTOSE
Glycerol
None of these

Solution :`{:("CHO"),("|"),(" "(CHOH)_(4)),("|"),(""CH_(2)OH):} OVERSET(NaBH_(4))to{:(CH_(2)OH),("|"),((CHOH)_(4)" (sorbitol)"),("|"),(CH_(2)OH):}`
Discussion
7.

Give the structure the structures and IUPAC names of products expected from the following reactions: (a) Catalytic reduction of butanal (b) Hydration of propene in presence of concentrated sulphuric acid. (c) Reaction of propanone with methylmagnesium bromide followed by hydrolysis.

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Solution :(a) `underset("Butanal")(CH_(3)CH_(2)CH_(2)CHO) OVERSET(H_(2)//Ni)to underset("Butan-1-ol")(CH_(3)CH_(2)CH_(2)CH_(2)OH)`
(b) `underset("Propene")(CH_(3)CH=CH_(2))underset(H_(2)SO_(4))overset("Conc.")to underset("ISOPROPYL hydrogen sulphate")(CH_(3)-underset(OSO_(3)H)underset(|)(C)H-CH_(3))underset(-H_(2)SO_(4))overset(H_(2)O," boil")to underset("Propan-2-ol")(CH_(3)-underset(OH)underset(|)(C)H-CH_(3))`
(c)
Discussion
8.

Give the structures and IUPAC names of monohydric phenols of molecular formula C_(7)H_(8)O

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SOLUTION :
Discussion
9.

Glucose on reduction with Na/Hg and water gives

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Fructose
Sorbitol
Gluconic acid
Saccharic acid

Answer :B
Discussion
10.

Glucose on reaction with HI gives n-hexane. What does it suggest about the structure of glucose ?

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Solution :SINCE n-hexane has six carbons connected is a STRAIGHT chain ,therefore , this reaction suggests that GLUCOSE also the six carbon atoms connected in a straight chain.
`underset("Glucose")(HOCH_(2)CHOHCHOHCHOHCHOHCHO)OVERSET(HI.Delta)to underset("n-Hexane")(CH_(3)CH_(2)CH_(2)CH_(2)CH_(2)CH_(3))`
Discussion
11.

Glucose on reduction with Na//Hg and water gives :

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Sorbitol
Fructose
Saccharic acid
Gluconic acid

Answer :A
Discussion
12.

Glucose on prolonged heating with HI, forms

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n-Pentane
n-Hexane
lodopentane
lodohexane

Answer :B
Discussion
13.

Give the structure of Z and E forms of cinnamic acid.

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Solution :REFER energy LEVEL diagram of equitorial - AXIAL cyclohexanol
Discussion
14.

Glucose on reaction with Br_2 water gives

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glucaric ACID
GLUCONIC acid
saccharic acid
CITRIC acid

Solution :GLUCOSE on oxidation with `Br_2` water gives gluconic acid
`{:(""CHO,,""COOH),(underset|overset|(""(CHOH)_4)+[O],overset(Br_2//H_2O)to,underset|overset|(""(CHOH)_4)),(""CH_2OH,,underset"Gluconic acid"(""CH_2OH)):}`
Discussion
15.

Give the structure of the principal of organic product (s) produced 3-ehtyl-2-pentene under each of the following reaction conditions. (i) H_20//Br_2 (ii) cold dilute KMnO_4//OH^- (iii) (a) BH_3 (b) NaOH//H_2O_2 (iv) (a) Hg (Oac)_2 (b) NaBH_4 (v) (a) O_3 (b) Zn dust aqueous CH_3COOH Peroxybenzoic acid (vii) CHCl_3/t - HOK

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Solution :`CH_3-CH_2-UNDERSET(CH_2-CH_3)underset(|)C=CH-CH_3` (A)
3-ethyl-2-pentene
(i) A `overset(H_2O //Br_2)rarrCH_3-CH_2-overset(Br)overset(|)underset(C_2H_5)underset(|)C-underset(Br)underset(|)CH-CH_3 + CH_3-overset(OH)overset(|)underset(C_2H_5)underset(|)C-underset(Br)underset(|)CH-CH_3`
(II)A `overset(KMnO_4//OH)underset(Cold)rarrCH_3-overset(OH)overset(|)underset(C_2H_5)underset(|)C-overset(HO)overset(|)CH-CH_3`
(III) `CH_3-CH_2-overset(CH_3)overset(|)CH-underset(OH)underset(|)CH-CH_3`
(iv) `CH_3-CH_2-overset(CH_3)overset(|)underset(C_2H_5)underset(|)C-CH_2-CH_3`
(v) `CH_3-CH_2-underset(C_2H_5)underset(|)C=Oand CH_3CHO`
(vi)
Discussion
16.

Glucose on oxidation with bromine water yields gluconic acid. This reaction confirms the presence of

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six carbon ATOMS linked in straight chain
secondary alcoholic group in GLUCOSE
aldehyde group in glucose
primary alcoholic group in glucose

Solution :Glucose on oxidation with BROMINE water yields GLUCONIC acid. This REACTION confirms the presence of aldehyde group in glucose.
`{:(""CHO,,""COOH),(underset|overset|(""(CHOH)_4)+[O],overset(Br_2-H_2O)to,underset|overset|(""(CHOH)_4)),(underset"Glucose"(""CH_2OH),,underset"Gluconic acid"(""CH_2OH)):}`
Here, `Br_2-H_2O` act as an oxidising agent and led to the oxidation of glucose into gluconic acid
Discussion
17.

Give the structure of the monomer of polypropene.

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SOLUTION :`CH_(3)-CH_(2)=CH_(2)`
Discussion
18.

Glucose on prolonged heating with Hl gives :

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n-Hexane
1-Hexene
Hexanoic ACID
6-iodohexanal

SOLUTION :n-Hexane
Discussion
19.

Glucose on oxidation gives the acid containing the C-chiral atoms equal to

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2
3
4
5

Solution :WRITE the OXIDATION reaction of GLUCOSE and COUNT number of CHIRAL carbon (having four different groups) in it.
Discussion
20.

Give the structure of the major products from 3-ethyl-2-pentene under each of the following conditions. (i) Br_2//H_2O (ii) HBr in presence of peroxide (iii) Hg(OAc)_2//OH^- (iv) BH_3//THF_1H_2O_2//OH^-

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SOLUTION :
Discussion
21.

Glucose on oxidation with Br_(2), water produces ________.

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SOLUTION :GLUCONIC ACID
Discussion
22.

Give the structure of the following compounds. (i) 4-Nitropropiophenone, (ii) 2-Hydroxycyclopentanecarbaldehyde, (iii) Phenylacetaldehyde.

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SOLUTION :.
Discussion
23.

Glucose molecule reacts with X number of phenylhydrazine to yield osazone. The value of 'X' is

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four
one
two
three

Solution :Oneglucose molecule REACTS with 3 MOLECULES ofphenyl hydrazine TOGIVE osazone .
Discussion
24.

Give the structure of the following compounds :

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SOLUTION :
Discussion
25.

Glucose on fermentation in presence of sodium sulphitegivesmainly :

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ETHYLENE GLYCOL and acetaldehyde
glycerol and propionaldehyde
glycerol and acetaldehyde
ethyl ALCOHOLAND propionaldehyde

Answer :C
Discussion
26.

Give the structure of the compound, C(C_(4)H_(8)) which when treated with H_(2)O//H_(2)SO_(4) gives C_(4)H_(10)O which cannot be resolved into optical isomers.

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Solution :SINCE alkene `C(C_(4)H_(8))` on treatment with `H_(2)O//H_(2)SO_(4)` gives an alcohol `C_(4)H_(10)O`, which cannot be resolved, therefore, the alkene must be 2-methylpropene

The other two POSSIBLE alkenes having M.F. `C_(4)H_(8)` are 1-butene adn 2-butene. these upon HYDRATION will give 2-butanol which is opticaly active.
`underset("1-Butanol")(CH_(3)CH_(2)CH=CH_(2)) underset(H_(2)SO_(4))overset(H_(2)O)to underset("2-Butanol (OPTICALLY active)")(CH_(3)CH_(2)-underset(OH)underset(|)overset(**)(C)H-CH_(3)) underset(H_(2)SO_(4))overset(H_(2)O)larr underset("2-Butene")(CH_(3)CH=CHCH_(3))`
Discussion
27.

Glucose molecule reacts with 'X' number of molecules of phenylhydrazine to yield osazone. The value of X is.

Answer»


ANSWER :C
Discussion
28.

Give the structure of sucrose.

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SOLUTION :
Discussion
29.

Give the structure of the above xenon fluorides. .

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SOLUTION :`XeF_2` is LINEAR, `XeF_4` is SQUARE PLANAR.
Discussion
30.

Give the structure of lowest molecular mass alcohol which is chiral?

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SOLUTION :The lowest molecular MASS alcohol which is chiral is butan-2-ol, i.e., `CH_(3)CH_(2)-overset(OH)overset(|)(.^(**)C)H-CH_(3)`
Discussion
31.

Give the structure of perchloric acid.

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SOLUTION :
Discussion
32.

Glucose molecule reacts with X number of molecules of phenylhydrazine to yield osazone. The value of X is.

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THREE
TWO
ONE
FOUR

ANSWER :A
Discussion
33.

Give the structure of noble gas species isostructural with Icl_(4)^(-)

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SOLUTION :`XeF_(4)`
Discussion
34.

Glucose molecule reacts with X number of molecules of phenylhydrazine to yield osazone. The value of X is

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three
two
one
four

Solution :
Discussion
35.

Give the structure of monomer of Teflon :

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SOLUTION :TETRAFLUOROETHYLENE `F- UNDERSET(F)underset(|)C=underset(F)underset(|)C-F`
Discussion
36.

Give the structure of lactose and show it is a· reducing sugar.

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Solution :On HYDROLYSIS, lactose yields GALACTOSE and glucose. Here, the `BETA`-D-galactose and `beta`-D- glucose are linked by `beta`-1,4 GLYCOSIDIC BOND. The aldehyde carbon is not involved in the glycosidic bond hence, it retains its reducing property and is called a reducing sugar.
Discussion
37.

Give the structure of equanil. Give its uses .

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SOLUTION :Structure of EQUANIL is
`H_2 N- overset(O)overset(||)C-O - CH_2- UNDERSET(CH_3)underset(|)overset(CH_3)overset(|)C-CH_2-O-overset(O)overset(||)C-NH_2`
It is USD as a tranquilizer in depression and hypertension.
Discussion
38.

Glucose may be converted into fructose by :

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Osazone formation
Lactone formation
Kiliani SYNTHESIS
NONE

ANSWER :A
Discussion
39.

Glucose is said to have CHO group. Which of the following reaction is not expected with glucose

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it FORM oxime
it REACT with`NaHSO_3`
it REDUCE TOLLEN's reagent
form n-hexane with HI

Answer :B
Discussion
40.

Give the structure of CO and CO_(2).

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Solution :Structure of CO : It has a linear structure. In carbon MONOXIDE, three electron pairs are shared between carbon and oxygen. The bonding can be EXPLAINED using molecular orbital THEORY. The C-O bond distance is 1.128Å. The structure can be considered as the resonance hybrid of the following two canonical FORMS.

Structure of `CO_(2)` : Carbon dioxide has a liner structure with equal bond distance for the both C-O bonds. In this molecule there is one C-O sigma bond. In addition there is `3c-4e` bond covering all the three ATOMS.
Discussion
41.

Glucose is used in :

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MANUFACTURE of VITAMIN C
As preservative
In the manufacture of alcohol
All

Answer :D
Discussion
42.

Give the structure of CO and CO_(2)

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SOLUTION :
Discussion
43.

Give the structure of an optically active hydrocarbon (C_(6)H_(12)) which on catalytic hydrogenation gives an optically inactive compound (C_(6)H_(14)).

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Solution :`UNDERSET("3Methylpent-1-ene (Opticall ACTIVE)")(CH_(2)=CH-OVERSET(CH_(3))overset(|)(.^(**)C)H-CH_(2)CH_(3)) overset(H_(2)//NI)to underset("3-Methylpentane (Optically INACTIVE)")(CH_(3)CH_(2)-overset(CH_(3))overset(|)(C)H-CH_(2)CH_(3))`
Discussion
44.

Glucose is stored in the liver in the polysaccharide form called:

Answer»

Starch
Amylopectin
Cellulose
Glycogen

Answer :D
Discussion
45.

Give the structure of alpha - D - glucose and beta - D - glucose.

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SOLUTION :
Discussion
46.

Glucose is oxidised to carbon dioxide and water with oxygen in the presence of enzyme :

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MALTOSE
`ALPHA`-AMYLASE
LACTOSE
Oxidose.

ANSWER :D
Discussion
47.

Give the structure of a nucleotide of DNA.

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SOLUTION :
Discussion
48.

Glucose is oxidised by strong oxidising agent gives

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saccharic acid
gluconic acid
n-hexane
sorbitol

Answer :A
Discussion
49.

Give the structure of ( a ) Hypochlorous acid (b ) chlorous acid( c ) chloric acid ( d ) perchloric acid.

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SOLUTION :
Discussion
50.

Glucose is not a…………...........

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CARBOHYDRATE
DISACCHARIDE
ALDOHEXOSE
Aldopentose

Solution :Disaccharide
Discussion