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.

1,1 Ethylidene dichloride to acetaldehyde

Answer»

SOLUTION :Ethylidene DICHLORIDE to ACETALDEHYDE :
2.

Ethylidene dichloride when boiled with aqueous solution of NaOH yields-

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FORMALDEHYDE
ACETALDEHYDE
acetone
ethyl METHYL ketone

Solution :acetaldehyde
3.

Ethylidene dichloride on treatment with aq.KOH gives:

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`CH_3CHO`
`CH_2OH-CH_2OH`
HCHO
`CHO-CHO`

ANSWER :A
4.

Ethylidene dichloride on treatment with aq. KOH gives

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HCHO
`CH_3CHO`
`{:(CHO),(|),(CHO):}`
`{:(CH_2OH),(|),(CH_2OH):}`

ANSWER :B
5.

Ethylidene chloride on treatment with aqueous KOH gives ?

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ACETALDEHYDE
ETHYLENE GLYCOL
FORMALDEHYDE
None

Answer :A
6.

Ethylidene chloride is a/an

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Gem-dihalide
Allylic halide
Vinylic halide
Vic-dihalide

Answer :A
7.

Ethylidene chloride on hydrolysis with aq. NaOH gives

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`CH_(3)CHO`
`CH_(3)COC_(2)H_(5)`
`C_(2)H_(5)OH`
`CH_(3)CH(OH)_(2)`

ANSWER :A
8.

Ethylidene chloride is a/an_____

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vic-dihalide
gem-dihalide
allylic halide
vinylic halide

Answer :B
9.

Ethylidene chloride and ethylene chloride are isomeric compounds. Which of the following statements is not true about these?

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Both of these react with alcoholic KOH and give the same product
Both are COLOURLESS, SWEET smelling liquids having boiling point more than 300 K
Both give same product with aqueous KOH
Both are dihalides

Answer :C
10.

Ethylene undergoes combustion according to the thermochemical equation : C_(2)H_(4)(g)+3O_(2)(g) to 2CO_(2)(g)+2H_(2)O(l), DeltaH^(@)=-337 kcal Assuming 70% efficiency, how much water at 20^(@) C can be converted into steam at 100^(@)C by the combustion of 10^(3) litres of C_(2)H_(4) gas at NTP ?

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SOLUTION :Mole of `C_(2)H_(4)=(1000)/(22.4)=44.6`
Total heat evolved `=44.6xx337=1.5xx10^(4)"KCAL"`
`:.`useful heat `=0.7xx1.5xx10^(4)=1.05xx10^(4)"kcal"`
Now, WATER evaporation TAKES place in two stages:
`H_(2)O(1,20^(@)C) to H_(2)O(1,100^(@)C),DeltaH=80"kcal//kg"`
and `H_(2)(1,100^(@)C) to H_(2)O(g,110^(@)C),DeltaH=540 "kcal//kg"`
`:. H_(2)O(1,20^(@)C) to H_(2)O(g,100^(@)C),DeltaH=620"kcal//kg"`
`:.` weight of water converted to steam
`("amount of heat available")/("heat requiredper kg")`
`=(1.05xx10^(4))/(620)=16.9kg`
11.

Ethylendiamine (en)

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Monodendate ligand and can OCCUPY one position in COORDINATION polyhedron
Bidendate ligand and can occupy TWO positions in coordinaton polyhedron
Polydendate ligand
Tridendate ligand and occupy THREE positions in coordination polyhedron

Answer :A
12.

Ethylidene chloride is a/an ……….. .

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vic-dihalide
gem-dihalide
ALLYLIC HALIDE
VINYLIC halide

SOLUTION :Gem-dihalides are ethylidene HALIDES.
13.

Ethylene readily undergoes the following type of reaction:

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ADDITION
Substitution
Elimination
Rearrangement

Answer :C
14.

Ethylene reacts with sulphur monochloride to give

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ETHYLENE chloride
Phosgene
Mustard gas
None of these

Answer :C
15.

Ethylene readily undergoes

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ADDITION reaction
Eilimination reaction
Substitution reaction
Rearrangement reaction

Answer :A
16.

Ethylene reacts with ozone gas to form the compound

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HCHO
`C_2H_5OH`

`CH_3CHO`

SOLUTION :
17.

Ethyne reacts with dil H_2SO_4 inpresence of HgSO_4 to give:

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Ethanal
Acetaldehyde
Ethane
Ethene

Answer :B
18.

Ethylene reacts with Baeyer's reagent to give

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Ethane
Ethyl alcohol
Ethyl glycol
None of these

Solution :`3CH_(2)=CH_(2)+2MnO_(4) + 4H_(2)O to 3{:(CH_(2)-OH),(|""+2KMnO_(2)+2KOH),(underset("Glycol")(CH_(2)-OH)):}`
19.

Ethylene reacts with Baeyer.s reagent to give :

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ETHANE
ETHYL alcohol
Ethylene glycol
None

Answer :C
20.

Ethylene reacts with alkaline KMnO_(4) to give :

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acetaldehyde
ethylene glycol
formaldehyde
ethylene oxide

SOLUTION :`underset("Ethylene")(H_(2)C = CH_(2)) OVERSET(ALK. KMnO_(4))rarr ""underset("Ethylene")underset(OH)underset(|)(CH_(2)) - underset("glycol")underset(OH)underset(|)(CH_(2))`
21.

Ethylene reacts with alkaline KMnO_(4) to form

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OXALIC acid
Ethyl alcohol
HCHO
Glycol

Answer :D
22.

Ethylene reacts with 1% cold alkaline KMnO_4 to give:

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OXALIC acid
acetone
Formaldehyde
Glycol

Answer :D
23.

Ethylene-propylene rubber (EPR) is

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UNSATURATED and stereoregular
SATURATED and stercoregular
atactic and unsaturated
syndiotactic and unsaturated

Solution :saturated and stercoregular
24.

Ethylene oxide when treated with Grignared reagent yeild

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Cyclopropyl alcohol
Primary alcohol
Secondary alcohol
Tertiary alcohol

Answer :B
25.

Ethylene oxide when treated with followed by hydrolysis yields

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SOLUTION :OPENING of 3-member RING TAKE PLACE
26.

Ethylene ontreatment with chlorine gives :

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ETHYLENE dichloride
Ethylene chlorohydrene
`CH_4`
`C_2H_6`

ANSWER :A
27.

Ethylene on interaction with sulphur monochloride gives :

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Mustard gas
Lewish gas
`CH_(3)CH_(2)Cl and S`
None of these

Solution :`CH_(2) = CH_(2) OVERSET(alk.KMnO_(4))RARR underset("ETHYLENE glycol")(underset(OH)underset(|)(CH_(2)) - underset(OH)underset(|)(CH_(2)))`
28.

Ethylene may be prepared by the dehydration of:

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ETHYL alcohol
Methyl alcohol
butane
ethane

Answer :A
29.

Ethylene molecule is _____shaped .

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ANSWER :PLANAR
30.

Ethylene may be obtained by dehydration of which of the following with concentratedH_(2)SO_(4) at 160-170^(@)C

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`C_(2)H_(5)OH`
`CH_(3)OH`
`CH_(3)CH_(2)CH_(2)OH`
`(CH_(3))_(2)CHCH_(2)OH`

Answer :A
31.

Ethylene is produced by cyclobutane…according to the reaction : C_(4)H_(8)overset(Delta)rarr2C_(2)H_(4) The rate constant is 2.48xx10^(-4)sec^(-1). Inwhat time will the molar ratio of the ethylene to cyclobutane in reaction mixture attain the value 1?

Answer»

`27.25` MINUTE
`28.25 minute
25 minute
20 minute

Answer :A
32.

Ethylene is shaken with a water solution of Br_(2) and NaC1. Which of the following will not be the possible product ?

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`BrCH_(2)CH_(2)C1`
`BrCH_(2)CH_(2)Br`
`BrCH_(2)CH_(2)OH`
`C1CH_(2)CH_(2)C1`

Solution :`ClCH_(2) CH_(2) CL` will not be FORMED because it requires the initial attack of `Cl^(+)` which is not possible with only NaCl.
33.

Ethylene is produced by C_4H_8oversetDeltararr2C_2H_4Cyclobutane. The rate constant is 2.48 xx 10^-4sec^-1. In what time will the molar ratio of the ethylene to cyclobutane in reaction mixture attain the value 1:

Answer»

27.25 minute
28.25 minute
25 minute
20 minute

Answer :A
34.

Ethylene is an unsaturated hydrocarbon which decolourises Br_(2)//C Cl_(4) and alkaline KMnO_(4) solutions. In contrast, benzene is highly unsaturated yet it does not give the above reactions. This is because

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` Br_2//C Cl_4` and ALKALINE `KMnO_4` are MILD reagents
all the carbon-carbon BOND lengths in benzene are equal
benzene is stabilized by RESONANCE
benzene is a PLANAR molecule.

Solution :Benzene is stabilized by resonance.
35.

Ethylene is converted to X on passing through a mixture of acidified aqueous solution of palladium chloride and cupric chloride. Which of the following reagents readily takes part addition reaction with X

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`Br_2`
HBr
HCl
HCN

Answer :D
36.

Ethylene is formed by the dehydration of

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`CH_(3)CHO`
`C_(2)H_(5)OH`
Propyl ALCOHOL
Ethyl ACETATE

Solution :N/A
37.

Ethylene is formed by dehydration of :

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`CH_3CHO`
`C_2H_5OH`
PROPYL alcohol
ethyle acetete

Answer :B
38.

Ethylene is a member of ……...series

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Alkyne
OLEFIN
Paraffin
Amine

Solution :Olefin because DOUBLE BOND is PRESENT
39.

Ethylene into ethyl methyl ether

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Solution :ETHYLENE into ETHYL methyl ETHER
`underset("ethylene")(CH_(2))=CH_(2)+HBrrarrunderset("ethyl bromide")(CH_(3)CH_(2)Br)`
`CH_(3)CH_(2)Br+underset("sodium methoxide")(CH_(3)ONa)overset(DELTA)rarrunderset("ethyl methyl ether")(CH_(3)-CH_(2)-O)-CH_(3)+NaBr`
40.

Ethylene has high b.p. and high vapour pressure at 100^@ C and does not dissolve in water. Hence ethylene is separated by this method

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SIMPLE distillation
Vacuum distillation
Vapour distillation
Alkali treatment

Answer :C
41.

Ethylenegylcol gives oxalic acid on oxidation with

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ACIDIFIED `K_(2)Cr_(2)O_(7)`
Acidified `KMnO_(4)`
Alkaline `KMnO_(4)`
Periodic acid

Solution :OXALIC acid is formed by oxidation of ethylene glycol with acidified potassium dichromate.
`{:(CH_(2)OH ""COOH),(|""+4[O]underset(H_(2)SO_(4))overset(K_(2)Cr_(2)O_(7))to |""+2H_(2)O),(underset("Ethylene glycol")(CH_(2)OH)""underset("Oxalic acid")(COOH)):}`
42.

Ethylene glycol, when héated to 773 K, it forms ………………….. .

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SOLUTION :EPOXIDE (or) 1,2-epoxy ETHANE (or) OXIRANE
43.

Ethylene glycol on oxidation with periodic acid gives

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FROMALDEHYDE
oxalic acid
glyoxal
glycolic acid

Solution :`{:(CH_(2)-OH),("|"),(CH_(2)-OH):} OVERSET(HIO_(4))toHCHO+HIO_(3) +H_(2)O`
44.

Ethylene glycol (molar mass = 62 g "mol"^(-1)) is a common automobile antifreeze. Calculate the freezing point of a solution containing 12.4 g of this substance in 100 g of water. Would it be advisable to keep this substance in the car radiator during summer ? Given : K_f for water = 1.86 K kg/mol, K_bfor water = 0.512 K kg/mol.

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SOLUTION :(i)Molality of the solution (m) = ` = (12.4 xx 1000)/(62 xx 100) = 2`
` Delta T_f = K_f xx m = 1.86 xx 2 = 3.72 K`
Freezing point of the solution = 273.15 K - 3.72 K = 269.43 K
(ii) `Delta T_b = K_bxx m = 0.512 xx 2 = 1.024 K`
Boiling point of the solution = 373 K + 1.024 K = 374.02 K
Yes, it is ADVISABLE to KEEP this SUBSTANCE in the car radiator during summer.
45.

Ethylene glycol on oxidation with per-iodic acid gives:

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OXALIC acid
Glyoxal
Formaldehyde
Glycollic acid

Answer :C
46.

Ethylene glycol onheating with conc H_(2)SO_(4) gives

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FORMIC ACID
DIOXANE
ACETALDEHYDE
formaldehyde

Answer :B
47.

Ethylene glycol is used as antifreeze in a cold climete. Mass of ethylene glycol which should be added to 4 kg of water = 1.86 K kg mol^(-1), molar mass of ethylene glycol = 62 g mol,^(-1) )

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804.32 g
204.30 g
400.-- g
304.60 g

Solution :`W_(B)=(M_(B)xxDeltaT_(f)xxW_(A))/K_(f)`
`=((62h MOL^(-1))xx(6K)xx(4KG))/((1.86"K kg" mol^(-1)))=800 g`
48.

Ethylene glycol is used as an antifreeze in a cold climate. Mass of ethylene glycol which should be added to 4 kg of water to prevent it from freezing at -6^(@)C will be : [K_(f) for water ="1.86 K kg mol"^(-1), and molar mass of ethylene glycol = "62 g mol"^(-1)]

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204.30g
400.00 g
304.60 g
804.32 g

Solution :`DeltaT_(f)=(1000K_(f)w_(2))/(w_(1)M_(2))""therefore""6=(1000xx1.86xxw_(2))/(4000xx62) or w_(2)=800g`
49.

Ethylene glycol is used as an antifreeze in a cold climate. Mass of ethylene glycol which should be added to 4 kg of water to prevent it from freezing at - 6^(@)C will be ( K for water = 1.86 "K kg mol"^(-1), and molar mass of ethylene glycol = 62 g "mol"^(-1) )

Answer»

400.00 g
304.60 g
804.32 g
204.30 g

Solution :`DeltaT_(F)=(K_(f)xx1000xxw_(2))/(w_(1)xxM_(2))`
`6=(1.86xx1000xxw_(2))/(4000xx62)`
`w_(2)=(6xx4000xx62)/(1.86xx1000)=800G`
50.

Ethylene glycol is used as an antifreeze in a cold climate. Mass of ethylene glycol which should be addedto 4 kg of water to prevent it from freezing at -6^(@)C will be (K_(f) for water = 1.86 Kkg mol^(-1), and molar mass of ethylene glycol =62 g mol^(-1))

Answer»

80.32 G
204.30 g
400.00 g
304.60 g

Solution :`Delta T_(F)=iK_(f)m, Delta T_(f)=6^(@)C, i=1`
`6=1xx1.86xx(W)/(62xx4)rArr w=804.32 g`