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QPID #4796 (SET 4)

CHEMISTRY NEET DPP Day -11

Subjective
Class/Batch: NEET Crash Duration: 60 min Date: 06 Apr,2023 Total Mark:200
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About Examination: CHEMISTRY NEET DPP Day -11

CHEMISTRY: HYDROCARBONS, Alcohols, Phenols and Ethers(Hydroxy compounds and Ethers), Hydrocarbons-Alkenes, Hydrocarbons-Alkynes,

Section 1    (Part-A) 35X4=140
1)
#2580136
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Question :

Ethyl alcohol is heated with conc. H2SO4 . The product formed is :

  2. C2H6

  3. C2H4

  4. C2H2
2)
#2580226
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Question :

Ethylene reacts with alkaline KMnO4 to form
 

  1. Oxalic acid

  2. HCHO

  3. Ethyl alcohol

  4. Glycol
3)
#2580245
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Question :

The test for unsaturation is confirmed by the decolourisation of which of the following
 

  1. Iodine water

  2. CuSO4 solution

  3. Bromine water

  4. All of these
4)
#2580288
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Question :

The acetylene molecule contains :
 

  1. 5 sigma bonds

  2. 4 sigma and 1 pi bonds

  3. 3 sigma and 2 pi bonds

  4. 2 sigma and 3 pi bonds
5)
#2580342
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Question :

Which one of the following has the minimum boiling point ?
 

  1. 1-Butene

  2. 1-Butyne

  3. n- Butane

  4. Isobutane
6)
#2580356
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Question :

Which of these will not react with acetylene?
 

  1. NaOH

  2. Ammonical AgNO3

  3. Na

  4. HCl
7)
#2580394
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Question :

  1. HBr, Br2, CH3COCH3, CH3CHO

  2. Br2, HBr, CH3COCH3, CH3CHO

  3. HBr, HBr, CH3COCH3, CH3CHO

  4. Br2, HBr, CH3CH2CHO, CH3CHO
8)
#2580419
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Question :

The benzene molecule contains
 

  1. 6 sp2 hybrid carbons

  2. 3 sp2 hybrid carbons

  3. 6 sp3 hybrid carbons

  4. 3 sp3 hybrid carbons
9)
#2580436
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Question :

The product A is
 

  1. Benzene

  2. Benzaldehyde

  3. Toluene

  4. Benzoic acid
10)
#2580476
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Question :

Benzene can be obtained in the reaction
 

  1. Ethene + 1, 3-butadiene

  2. Trimerisation of ethyne

  3. Reduction of PhCHO

  4. All of these
11)
#2580503
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Question :

AlCl3 acts as ________ in Friedel-Crafts reaction
 

  1. nucleophile

  2. electrophile

  3. free radical

  4. intermediate
12)
#2580513
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Question :

During the nitration of benzene. In the process of generation of nitronium ion sulphuric acid behaves as a/an ______ and nitric acid behave as a/an _________.
 

  1. base, acid

  2. acid, base

  3. strong acid, weak acid

  4. weak acid, strong acid
13)
#2580523
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Question :

Which of the following statements are correct regarding structure of methane ?
(i) Methane has tetrahedral structure.
(ii) The bond angle between all H – C – H bonds is 109.5°.
(iii) The carbon atom is sp2 hybridized.
(iv) C – C and C – H bond lengths are 154 pm and 112 pm respectively.
 

  1. (i), (ii) and (iii)

  2. (i), (iii) and (iv)

  3. (i), (ii) and (iv)

  4. (i), (ii), (iii) and (iv)
14)
#2580542
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Question :

Which of the following statements are correct ?
(i) The general formula of alkenes is CnH2n.
(ii) Alkenes are also known as paraffins.
(iii) Bond length of C–C double bond in alkene is shorter than C–C single bond in alkane.
(iv) Carbon–Carbon double bond in alkene consists of two sigma bonds.
(v) Alkenes are easily attacked by electrophilic reagent.
 

  1. (i) and (iv)

  2. (i), (iii) and (v)

  3. (i) and (iii)

  4. (i), (ii), (iv) and (v)
15)
#2584163
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Question :

Which of the following shows structure of allylic alcohol?
(i) CH2 =CH- CH2OH
(ii) CH2 =CH- OH
(iii) CH2=CH- CH(CH3 )OH
(iv)  CH2 =CH- C (CH3)2 OH

  1. (i), (iii) and (iv)

  2. (i), (ii) and (iv)

  3. (ii), (iii) and (iv)

  4. (i), (ii), (iii) and (iv)
16)
#2584175
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Question :

ClCH2CH2OH is stronger acid than CH3CH2OH because of:

  1. – I effect of Cl increases negative charge on O atom of alcohol

  2. – I effect of Cl disperses negative charge on O atom to produce more stable cation

  3. – I effect of Cl disperses negative charge on O atom to produce more stable anion

  4. None of these
17)
#2584197
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Question :

In the following sequence of reactions.

CH3 CH2OH→P+I2A→etherMgB→HCHO C→H2OD the compound D is

  1. propanal

  2. butanal

  3. n-butyl alcohol

  4. n-propyl alcohol
18)
#2580125
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Question :

Ethyl bromide gives ethylene when reacted with –
 

  1. ethyl alcohol

  2. dilute H2SO4

  3. aqueous KOH

  4. alcoholic KOH
19)
#2580215
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Question :

In the following sequence of reactions, the alkene affords the compound ‘B’

The compound B is
 

  1. CH3CH2CHO

  2. CH3COCH3

  3. CH3CH2COCH3

  4. CH3CHO
20)
#2580229
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Question :

The reaction of HI with CH3 – CH = CH2 at 400°C yields :
 

  1. CH2 I – CH = CH2

  2. CH3 – CHI – CH3

  3. CH3 – CH2 – CH2 I

  4. CH2I – CH2 – CH2I
21)
#2580257
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Question :

The IUPAC name of the compound CH3CH = CHC ≡ CH is
 

  1. Pent-l-yn-3-ene

  2. Pent-4-yn-2-ene

  3. Pent-3-en-1-yne

  4. Pent-2-en-4-yne
22)
#2580313
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Question :

The correct order towards bond length is
 

  1. C - C < C = C < C ≡ C

  2. C ≡ C < C = C < C - C

  3. C = C < C ≡ C < C - C

  4. C = C < C - C < C ≡ C
23)
#2580351
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Question :

Which of the following will be the final product when C2H2 reacts with HCl

  4. None of these
24)
#2580383
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Question :

Which of the following reaction is shown by alkynes ?
 

  1. Addition

  2. Substitution

  3. Polymerization

  4. All of these
25)
#2580403
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Question :

Which of the following catalyst is used for the following conversion ?

 

  1. Platinized Asbestos

  2. Red hot iron tube

  3. Platinized Nickel

  4. Iron-molybdenum
26)
#2580421
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Question :

Aromatic compounds burn with sooty flame because
 

  1. they have a ring structure of carbon atoms

  2. they have a relatively high percentage of hydrogen

  3. they have a relatively high percentage of carbon

  4. they resist reaction with oxygen of air
27)
#2580453
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Question :

Catalytic hydrogenation of benzene gives
 

  1. xylene

  2. cyclohexane

  3. benzoic acid

  4. toluene
28)
#2580498
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Question :

Benzene on reaction with ozone forms __________.
 

  1. 2 molecules of aldehyde and 1 molecule of ketone

  2. 2 molecules of ketone and 1 molecule of aldehyde

  3. triozonide

  4. hexaozonide
29)
#2580509
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Question :

The electrophilic substitutions reactions of benzene takes place via
(i) generation of electrophile
(ii) generation of nucleophile
(iii) formation of carbocation intermediate
(iv) removal of proton from the carbocation intermediate
 

  1. (i), (iii) and (iv)

  2. (ii), (iii) and (iv)

  3. (i) and (iv)

  4. (ii) and (iv)
30)
#2580516
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Question :

Benzene is highly unsaturated but it does not undergo addition reaction because
 

  1. π-electrons of benzene are delocalised.

  2. cyclic structures do not show addition reaction

  3. benzene is a non-reactive compound

  4. All of the above
31)
#2580533
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Question :

Which of the following statements are correct ?
(i) The rate of reactivity of alkanes with halogens is F2 > Cl2 > Br2 > I2.
(ii) Rate of replacement of hydrogens of alkanes is 3° > 2º > 1°
(iii) Fluorination of alkanes is a very slow process.
(iv) Iodination of alkanes is too violent to be controlled.
 

  1. (i), (ii) and (iii)

  2. (i) and (ii)

  3. (ii) and (iii)

  4. (i) and (iv)
32)
#2584127
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Question :

Propene, CH3CH = CH2 can be converted into 1-propanol by oxidation. Indicate which set of reagents amongst the following is ideal to effect the above conversion ?

  1. KMnO4 (alkaline)

  2. Osmium tetraoxide (OsO4/CH2Cl2)

  3. B6H6 and alk. H2O2

  4. O3/Zn
33)
#2584167
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Question :

Mechanism of acid catalysed hydration reaction involves
(i) Protonation of alkene to form carbocation by electrophilic attack of H3O+
(ii) Nucleophilic attack of water on carbocation.
(iii) Deprotonation to form alcohol.

  1. (i) and (ii)

  2. (i) and (iii)

  3. (i), (ii) and (iii)

  4. (ii) and (iii)
34)
#2584189
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Question :

The reagent used for dehydration of an alcohol is

  1. phosphorus pentachloride

  2. calcium chloride

  3. aluminium oxide

  4. sodium chloride
35)
#2584203
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Question :

Which one of the following will show the highest pH value ?

  1. m–nitrophenol.

  2. p–nitrophenol.

  3. o–nitrophenol

  4. Both (b) and (c).
Section 2    (Part-B) 15X4=60
36)
#150916
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Question :

Ethylene reacts with 1% alkaline KMnO4 to form 

  1. Oxalic acid

  2. Ethylene glycol 

  3. Ethyl alcohol

  4. HCHO
37)
#150983
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Question :

A gas formed by the action of alcoholic KOH on ethyl iodide, decolourises alkaline KMnO4. The gas is 

  1. C2H6

  2. CH4

  3. C2H2

  4. C2H4
38)
#151213
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Question :

Cyclohexene on reaction with OsO4 followed by reaction with NaHSO3 gives

  1. 𝑐𝑖𝑠 − diol 

  2. 𝑡𝑟𝑎𝑛𝑠 − diol

  3. Epoxy

  4. Alcohol 
39)
#166120
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Question :

The major product in the following reaction:

\(R - C \equiv C - {R^|} + {H_2}\xrightarrow{{Na/liqN{H_3}}}?\)

40)
#168190
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Question :

In the above reaction x is

  1. HNO3

  2. O2

  3. O3

  4. KMnO4
41)
#2583941
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Question :

Widespread deaths due to liquor poisoning occurs due to

  1. presence of carbonic acid in liquor

  2. presence of ethyl alcohol in liquor

  3. presence of methyl alcohol in liquor

  4. presence of lead compounds in liquor
42)
#2583968
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Question :

Ethanol and dimethyl ether form a pair of functional isomers. The boiling point of ethanol is higher than that of dimethyl ether, due to the presence of

  1. H-bonding in ethanol

  2. H-bonding in dimethyl ether

  3. CH3 group in ethanol

  4. CH3 group in dimethyl ether
43)
#150893
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Question :

Correct statement about 1,3-dibutene

  1. Conjugated double bonds are present 

  2. Reacts with HBr 

  3. Forms polymer 

  4. All of the above 
44)
#150940
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Question :

Following compound is treated with NBS Compound formed A is

45)
#151019
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Question :

Addition of HBr to propylene in presence of benzoyl peroxide, follows

  1. Markownioff’s rule 

  2. Baeyer’s rule

  3. Carbanion mechanism 

  4. 𝑎𝑛𝑡𝑖-Markownioff’s rule 
46)
#151384
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Question :

 The final product in following sequence of reaction is

\(CH \equiv CH\xrightarrow{{NaN{H_2}}}A\xrightarrow{{C{H_3}Br}}B,\)

  1. \(C{H_2} = CH - CH = C{H_2}\)

  2. \(HC \equiv C - C{H_3}\)

  3. \(C{H_2} = CH - C{H_3}\)

  4. \(C{H_3} - C{H_2} - C{H_3}\)
47)
#166134
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Question :

The major product in the following reaction is:

48)
#2583939
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Question :

Tonics in general contain

  1. Ether

  2. Methanol

  3. Ethanol

  4. Rectified spirit
49)
#2583947
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Question :

Denaturation of alcohol is the

  1. mixing of CuSO4 (a foul smelling solid) and pyridine (to give the colour) to make the commercial alcohol unfit for drinking

  2. mixing of CuSO4 (to give the colour) and pyridine (a foul smelling solid) to make the commercial alcohol unfit for drinking

  3. mixing of Cu(OAc)2 and ammonia to make the commercial alcohol unfit for drinking

  4. mixing of Cu(OAc)2 and pyridine to make the commercial alcohol unfit for drinking
50)
#2583977
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Question :

An ether is more volatile than an alcohol having the same molecular formula. This is due to

  1. dipolar character of ethers

  2. alcohols having resonance structures

  3. inter-molecular hydrogen bonding in ethers

  4. inter-molecular hydrogen bonding in alcohols
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