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.

Compound "X" undergoes the following sequences of reactions to form "Y" compound "Y"is -

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ANSWER :B
2.

Compound X undergoes formation of cyanohydrin which on hydrolysis gives lactic acid (CH_(3)CH(OH)COOH). Therefore, compound X is

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FORMALDEHYDE
Acetaldehyde
Acetone
Benzaldehyde.

Answer :A
3.

Compound (X) of molecular formula C_(4)H_(8) takes up one equivalent of hydorgen in presence of Pt to form another compound (Y). [Y] on ozonolysis gives acetaldehyde as the only product. Compound [X] is :

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`a`. `CH_(3)-CH_(2)-CH=CH_(2)`
`B`. `CH_(3)-CH=CH-CH_(3)`
`C`. CYCLOBUTANE
`d`. Cyclobutene

Solution :`CH_(3)-CH=CH-CH_(3)`
4.

Compound (X), molecular formula C_(8)H_(8)O, is water insoluble and gives yellow ppt with l_(2)//NaOH. It reacts with H_(2)N-OH in the presence of NH_(4)Cl//NH_(4)OH to give two geometrical isomers, which do not undergo dehydration but can go for rearrangement with acids. Compound (X) can be,

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SOLUTION :COMPOUND (X) is having

GROUP as it gives POSITIVE haloform test.
Hence, (X) should be (A) and (D).
Hence, (A) and (D) are the CORRECT answers.
5.

Compound X is tested and the results are shown in the table : Which ions are present in compound X?

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Ammonium ions and sulphite ions
Ammonium ions and carbonate ions
Sodium ions and carbonate ions
Ammonium ions and sulphate ions.

Solution :In the first test , in PRESENCE of alkali , a gas with basic nature is evolved . This is possible with `overset(+)(N)H_(4)` salts .
`overset(+)(N)H_(4) + NaOH_((aq)) overset(Delta)(to) NH_(3) + H_(2)O + Na^(+)`
For the second test , effervescence and turning lime water milky GENERALLY gives the IDEA of two gases : `CO_(2)` and `SO_(2)` . But as the gas turns acidified `K_2 Cr_2 O_7` PAPER green so the gas should be `SO_2` . Sulphite salts on reaction with dil. HCl evolves `SO_(2)` .
`K_(2) underset("(orange)")(Cr_(2) O_(7)) + SO_(2) + H_(2) SO_(4) to underset("(green)") (Cr_(2) (SO_(4))_(3)) + K_(2) SO_(4) + H_(2)O`
6.

CompoundX is thetreatedwith NH_(2)OHandby reductiongives . (CH_(3))_(2)CHCH_(2) overset(NH_(2))overset(|)(CHCH_(2))(CH_(3))_(3) The compoundX is .

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`(CH_(3))_(2)CHCH_(2)overset(NOH)overset(||)(C CH_(2))(CH_(3))_(3)`
`(CH_(3))_(2)CHCH_(2)overset(CN)overset(|)(CHCH_(2))C(CH_(3))_(3)`
`(CH_(3))_(2)CHCH_(2) overset(CH)overset(|)(CHCH_(2))C(CH_(3))_(3)`
`(CH_(3))_(2)CHCH_(2)overset(O)overset(||)(C CH_(2))C(CH_(3))_(3)`

ANSWER :D
7.

Compound 'X' is used in bordeaux mixture. It has electrovalent,covalent, coordinate as well asH-bonds. In compound X based on the nature of bonds and interaction, the number of types of water molecules is :

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1
2
3
4

Solution :
8.

Compound X is

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`H_(3)C-C-=C-CH_(3)`
`CH_(2)=CH-CH=CH_(2)`
`CH_(3)-CH_(2)-C-=CH`

SOLUTION :
9.

compound 'X' is :

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`1`-Methylcyclopropene
`1,4`-Dimethylcyclogexa-`1,4`-DIENE
`1,4`-Dimethylcyclohexa-`1,3`-diene
`1,2`-Dimethylcyclohexa-`1,4`-diene

Solution :
10.

Compound X is :

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`(a) H_(3)C-C-=C-CH_(3)`
`CH_(2)=CH-CH=CH_(2)`
`(c ) CH_(3)-C-=C-CH_(2)-CH_(2)-CH`

Solution :N//A
11.

Compound "X" in the following reaction is

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ANSWER :C
12.

Compound 'X' hasmolecular formulaC_(4)H_(8)O_(3). It evovlesCO_(2) with aq. NaHCO_(3), 'X'reactswithLiAIH_(4)to givea chiral porduct . Thestructure of 'X' is .

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ANSWER :B
13.

Compound "X" in the following reaction is

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ANSWER :C
14.

Compound 'X' has molecular formula C_(4)H_(8)O_(3). It evolves CO_(2) with aq. NaHCO_(3) 'X' reacts with LiAlH_(4) to given an achiral product. The structure of 'X' is

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ANSWER :B
15.

Compound [X] gives positive test with 2, 4-DNP and with I_(2) // NaOH compound [X] may be

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`C_(6)H_(5)COCH_(3)`
`CH_(3)COCH_(3)`
`CH_(3)-CHO`
all of these

Solution :Due to METHYL KETOGROUP
16.

Compound 'X' containing chlorine, on treatment with NH_(3) gives a solid 'Y' which is free from chlorine. (Y) analysed as C=49.31%,H=9.59% and N=19.18% and reacts with Br_(2) and caustic soda to give a basic compound (Z),(Z) reacts with HNO_(2) to give ethanol. Suggest structure of (X), (Y) and (Z).

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Answer :EMPIRICAL FORMULA of (Y) is `C_(3)H_(7)NO`
CH_(3)CH_(2)NH_(2)`
`CH_(3)CH_(2)COCl+NH_(3)rarr2 CH_(3)CH_(2)CONH_(2)`
17.

Compound X (C_8H_5O) will give following laboratory test. {:("Isomers",FeCl_2,AgNO_3//NH_4OH,"Na metal"),(X,"Coloured solution","Negative",1//2H_2darr):} X can be :

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ANSWER :C
18.

Compound X (C_7H_14O_4) on ozonolysis gives (Y) and (Z).(Z) is the aldehyde which gives only oxime with NH_2-OH On treatment with I_2/(NaOH).(Y) gives yellow solid CHI_3 alongwith compound given below. When (X) is treated with D_2//Ni.It gives two optically active compound (V) and (W). Which of the following statement is true

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X' gives POSITIVE test with 2,4-DNP and `Br_2` solution
Y gives positive with both 2,4-DNP and Bayer's reagent
Compond (V) gives positive test with `NaHCO_3`

is the isomeric AMIDE of oxime of next HIGHER homolog of Z

Solution :
19.

Compound X (C_7H_14O_4) on ozonolysis gives (Y) and (Z).(Z) is the aldehyde which gives only oxime with NH_2-OH On treatment with I_2/(NaOH).(Y) gives yellow solid CHI_3 alongwith compound given below. When (X) is treated with D_2//Ni.It gives two optically active compound (V) and (W). Compound (Y) can give ....... types of oximers on treatment with CH_2-OH

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2
16
8
7

Answer :A
20.

Compound (X) C_(6)H_(5)O gives yellow coloured ppt with 2,4 DNP but does not give red colored ppt with Fehiling's solution (X) on treatement with NH_(2)OH H^(+) gives compound (Y) C_(6)H_(5)NO (Y) when treated with PCl_(5) gives isomeric compound (Z) . (Z) on hydrolysis gives propanoic acid and aniline. what will be the correct structure of (X) ,(Y) and (Z) ?

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SOLUTION :
21.

Compound X (C_7H_14O_4) on ozonolysis gives (Y) and (Z).(Z) is the aldehyde which gives only oxime with NH_2-OH On treatment with I_2/(NaOH).(Y) gives yellow solid CHI_3 alongwith compound given below. When (X) is treated with D_2//Ni.It gives two optically active compound (V) and (W). Compound (V) and (W) are

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Enantiomers
Diastereomers
identical
Nuclear isomers

Answer :B
22.

Compound X and Y both have the same molecular formula (C_4H_8O).They give following observation in some lab test. {:("Test",X,Y),(Br_2-"water","positive","negative"),("Na-matel","positive","negative"),("Lucas reagent","turbidity after some time","negative"),("Iodoform test","negitive","negative"):} The compound X and Yare

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ANSWER :C,D
23.

Compound with molecular formula C_3H_8O on vigorous oxidation produces an acid C_3H_6O_2. It is

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`3^@` alcohol
`2^@` alcohol
`1^@` alcohol
not necessary

Solution :Alcohol and ACID contains same numberofcarbon atoms, HENCE it is primary alcohol.
24.

Compound with identical crystal structure and analogous chemical formula are called:

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ISOMERS
ISOTONES
allotropes
isomorphous

Answer :D
25.

Compound which shows positive mesomeric effect:

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`H_(2)C=CH-Cl`
`C_(6)H_(5)-OVERSET(+)N-Me_(3)`
`H_(2)C=CH-CH_(2)Cl`
`C_(6)H_(5)-CH=CHCl`

ANSWER :A::B
26.

Compound whichrotates theplanepolarisedlightisknown asopticallyactivecompound. On thebasisofdirectionof rotationtwoformsof an opticallyactivecompoundsare termedas dextro andlaevo rotatory. The twoare termedas enantiomers. Ifwe have a1 : 1mixtureof d andl isomersof a given chiralcompound, opticalrotation of suchmixtureis zeroSucha mixtureis optically inactive and is calleda recemic modification. Thenetspecificrotation of any mixtureof the dand isomersof a givenchiral compoundis equalto the weightedaverageof the rotations due to boththe isomersMathematicallyif can beexpressedas : [alpha]_(net) =f_(d) [alpha_(d)] + f_(1) [alpha_(l)] Where f_(a) and f_(l)are fractionsof d and l isomersrespectively and [alpha_(d)] , [alpha_(l)] are theirspecificrotationsWhich of thefollowingmolecule canresolvedintoenantiomers ?

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All of these

Answer :2
27.

Compound whichrotates theplanepolarisedlightisknown asopticallyactivecompound. On thebasisofdirectionof rotationtwoformsof an opticallyactivecompoundsare termedas dextro andlaevo rotatory. The twoare termedas enantiomers. Ifwe have a1 : 1mixtureof d andl isomersof a given chiralcompound, opticalrotation of suchmixtureis zeroSucha mixtureis optically inactive and is calleda recemic modification. Thenetspecificrotation of any mixtureof the dand isomersof a givenchiral compoundis equalto the weightedaverageof the rotations due to boththe isomersMathematicallyif can beexpressedas : [alpha]_(net) =f_(d) [alpha_(d)] + f_(1) [alpha_(l)] Where f_(a) and f_(l)are fractionsof d and l isomersrespectively and [alpha_(d)] , [alpha_(l)] are theirspecificrotationsThe pure of isomerof certainchiralcompoundhas [alpha]_(d)^(25) =+ 55^(@) .A non racemicmixtureof thiscompoundhas a net [alpha]_(d)^(25) =- 11^(@) . Whatis thefractionsof thisisomer in mixture?

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0. 40
0.6
0.3
0.70

Answer :1
28.

Compound whichrotates theplanepolarisedlightisknown asopticallyactivecompound. On thebasisofdirectionof rotationtwoformsof an opticallyactivecompoundsare termedas dextro andlaevo rotatory. The twoare termedas enantiomers. Ifwe have a1 : 1mixtureof d andl isomersof a given chiralcompound, opticalrotation of suchmixtureis zeroSucha mixtureis optically inactive and is calleda recemic modification. Thenetspecificrotation of any mixtureof the dand isomersof a givenchiral compoundis equalto the weightedaverageof the rotations due to boththe isomersMathematicallyif can beexpressedas : [alpha]_(net) =f_(d) [alpha_(d)] + f_(1) [alpha_(l)] Where f_(a) and f_(l)are fractionsof d and l isomersrespectively and [alpha_(d)] , [alpha_(l)] are theirspecificrotationsWhat is theenantiomericexcess in anypuresampleof anopticallyactivesubstance ?

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0.5
1
0
Dependsupon thespecific ROTATION

ANSWER :`2`
29.

Compound which is added to soap to impart antiseptic properties is _____________

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SODIUM lauryl sulphate
sodium dodecylbenzenesulphonate
rosin
bithional

Answer :D
30.

Compound which is added to soap to impart antiseptic properties is ........

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SODIUM laurylsulphate
sodium dodecylbenzenesulphonate
rosin
BITHIONAL 

SOLUTION :bithional
31.

Compound which is added to soap to impart antiseptic properties is "………….."

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sodium laurylsulphate
sodium dodecylbenzenesulphonate
rosin
bithional

Solution :Basically, all soaps are made by boiling FATS or oils with suitable HYDROXIDE Variations are made by ADDING differentraw MATERIALS. Sodium laurysulphate and sodium dodecylbenzensulphonate are anionic detergents.
A gum rosin added to soap to make it lather well, Bithional is added to soapsto impart antiseptic properties to soap.
32.

Compound which is added to soap to impart antiseptic properties is ____________

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SODIUM laurylsulphate
sodium dodecylbenzenesulphonate
rosin
bithional

ANSWER :D
33.

Compound which has maximum peroxide linkage is -

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`H_(2)SO_(5)`
`H_(2)S_(2)O_(8)`
`BaO_(2)`
`CrO_(5)`

SOLUTION :
34.

Compound which gives alcohol on reduction is/are

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`Me-UNDERSET(O)underset(||)(C)-Cl`
`Me-underset(O)underset(||)(C)-NH_(2)`

`Me-OVERSET(O)overset(||)(C)-O-overset(O)overset(||)(C)-Me`

Solution :`-`ALCOHOLS have `-OH` GROUP
- Amide `(-overset(O)overset(||)(C)-NH_(2))` does not GIVE alcohol on reduction.
35.

Compound which forms an orange red precipitate with 2, 4 - DNP reagent and gives yellow precipitate on heating with iodine in the presence of sodium hydroxide is

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`(AAK_MCP_37_NEET_CHE_E37_045_A01)`

ANSWER :B
36.

Compound used to remove the permanent hardness of water is ……………

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Zeolite
Feldspar
Talc
Mica

Answer :A
37.

Compound which does not give yellow ppt, when treated with l_2 in alkali is

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`(AAK_MCP_37_NEET_CHE_E37_033_A01)`

ANSWER :C
38.

Compoundwhichdoes nottautomeriseand doesnot show acidicproperty is

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`CH_(3) - NO_(2)`
`C_(2)H_(5) - NO_(2)`
`(CH_(3))_(2) CH- NO_(2)`
`(CH_(3))_(3) C -NO`

ANSWER :D
39.

Compound which can give effevescences with NaHCO_(3) .

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Answer :(i),(ii),(III),(IV), (V), (IX)
40.

Compound used to remove the permanent hardness of water is ……………. .

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ZEOLITE
Feldspar
Talc
Mica

Solution :Zeolite
41.

Compound used in safety matches is

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<P>`P_4S_3`
`P_4`
`P_2O_5`
`PCl_3`

Solution :`P_(4)S_(3)` - is used in safety MATCHES
42.

Compoundsusedas an eyelotion ……..?

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`H_(3)BO_(3)`
`HBO_(2)`
`H_(2)B_(4)O_(7)`
`B_(2)O_(3)`

ANSWER :A
43.

Compound used for propellant i s ..................

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BN
`H_(2)B_(4)O_(7)`
`B_(2)H_(6)`
BORAX

Answer :C
44.

Compound used in photography is ………………… .

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`AgNO_(3)`
`AGBR`
`AGCL`
`AGI`

Solution :`AgNO_(3)`
45.

Compound that is both paramagnetic and coloured is

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`K_(2)Cr_(2)O_(7)`
`(NH_(4))_(2) [TiCl_(6)]`
 `VOSO_(4)`
`K_(3)[CU(CN)_(4)]`

Solution :`K_(2)Cr_(2)O_(7)` contains `Cr^(6+) (3d_(@)) ion` which is diamagnetic and is coloured due to charge transfer, and `(NH_(4))_(2) [TiCI_(6))]` contains `Ti^(4+) (3d^(@))` which is diamagnetic and colourless, `VOSO_(4)`, contains `V^(4+)(3d^(1))` which is paramagnetic and coloured `K_(3)[Cu(CN)_(4)]` contains `Cu^(+) (3d^(10))` which is diamagnetic and colourless. Hence, (C) is the correct ANSWER.
46.

Compound that has smell of bitter almonds is

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aniline
benzonitrile
phenyl isocyanide
NITROBENZENE.

Solution :Nitrobenzene has a SMELL of BITTER ALMONDS.
47.

Compound that gives a positive iodoform test is:

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1- PENTANOL
2- pentanone
3- pentanone
pentanal

Answer :B
48.

Compound represented by this structure

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D-threose
L-threose
D-erythrose
L-erythrose

ANSWER :C
49.

Compound (s) is used for the distinction of primary, secondary and tertiary amines is/are

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ALKALINE chloroform
benzenesulphonyl chloride
p-toluenesulfonyl chloride
both (2)& (3)

ANSWER :D
50.

Compound Ph-O-overset(O)overset(||)(C)-Ph can be prepared by the reaction of____

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Phenol and benzoic ACID in the presence of NaOH
Phenol and benzoyl CHLORIDE in the presence of pyridine
Phenol and benzoyl chloride in the presence of `ZnCl_(2)`
Phenol and benzaldehyde in the presence of palladium

Solution :`underset("Phenol")(PhOH)+underset("Benzoyl chloride")(Cl-overset(O)overset(||)(C)-PH) underset(("Schottein-Baumann reaction"))overset("Pyridine")to underset("Phenyl benzoate")(Ph-O-overset(O)overset(||)(C)-Ph+HCl)`