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+1 Organic Chemistry BB 1mark Quiz

Total questions: 43

Worksheet time: 22mins

Name
Class
Date
1.

Select the molecule which has only one pibond.

a)

CH3 - CH = CH - CH3

b)

CH3 - CH = CH - CHO

c)

CH3 - CH = CH - COOH

d)

All of these

2.

In the hydrocarbon CH3 - CH2 - CH = CH- CH2 - C≡CH the state of hybridisation of carbon 1,2,3,4 and 7 are in the following sequence.

a)

sp, sp, sp3 , sp2 , sp3

b)

sp2 , sp, sp3 , sp2 , sp3

c)

sp, sp, sp2 , sp, sp3

d)

none of these

3.

The general formula for alkadiene is

a)

Cn H2n

b)

Cn H2n-1

c)

Cn H2n-2

d)

Cn Hn-2

4.

The IUPAC name of the Compound is

a)

2,3 - Diemethylheptane

b)

3- Methyl -4- ethyloctane

c)

5-ethyl -6-methyloctane

d)

4-Ethyl -3 - methyloctane.

5.

Which one of the following names does not fit a real name?

a)

3 - Methyl -3-hexanone

b)

4-Methyl -3- hexanone

c)

3- Methyl -3- hexanol

d)

2- Methyl cyclo hexanone.

6.

The IUPAC name of the compound is

a)

Pent - 4 - yn-2-ene

b)

Pent -3-en-l-yne

c)

pent - 2- en - 4 - yne

d)

Pent - 1 - yn -3 -ene

7.

IUPAC name of is

a)

3,4,4 - Trimethylheptane

b)

2 - Ethyl -3, 3- dimethyl heptane

c)

3, 4,4 - Trimethyloctane

d)

2 - Butyl -2 -methyl - 3 - ethyl-butane.

8.

The IUPAC name of is

a)

2,4,4 - Trimethylpent -2-ene

b)

2,4,4 - Trimethylpent -3-ene

c)

2,2,4 - Trimethylpent -3-ene

d)

2,2,4 - Trimethylpent -2-ene

9.

The IUPAC name of the compound is

a)

3 - Ethyl -2- hexene

b)

3 - Propyl -3- hexene

c)

4 - Ethyl - 4 - hexene

d)

3 - Propyl -2-hexene

10.

The IUPAC name of the compound is

a)

2 - Hydroxypropionic acid

b)

2 - Hydroxy Propanoic acid

c)

Propan - 2- ol -1 - oic acid

d)

1 - Carboxyethanol.

11.

The IUPAC name of is

a)

2 - Bromo -3 - methyl butanoic acid

b)

2 - methyl - 3- bromobutanoic acid

c)

3 - Bromo - 2 - methylbutanoic acid

d)

3 - Bromo - 2, 3 - dimethyl propanoic acid.

12.

The structure of isobutyl group in an organic compound is

a)

CH3 - CH2 - CH2 - CH2

b)

CH3 - C CH3 CH3

c)

CH3 - CH - CH2 - CH3

d)

CH3 - CH - CH2 - CH3

13.

The number of stereoisomers of 1,2-dihydroxycyclopentane

a)

1

b)

2

c)

3

d)

4

14.

Which of the following is optically active?

a)

3 - Chloropentane

b)

2 Chloro propane

c)

Meso - tartaric acid

d)

Glucose

15.

The isomer of ethanol is

a)

acetaldehyde

b)

dimethylether

c)

acetone

d)

methyl carbinol

16.

How many cyclic and acyclic isomers are possible for the molecular formula C3 H6 O?

a)

4

b)

5

c)

9

d)

10

17.

Which one of the following shows functional isomerism?

a)

ethylene

b)

Propane

c)

ethanol

d)

CH2 Cl2

18.

CH2 -C-CH3 and CH2 = C - CH3 O O are

a)

resonating structure

b)

tautomers

c)

Optical isomers

d)

Conformers.

19.

Nitrogen detection in an organic compound is carried out by Lassaigne's test. The blue colour formed is due to the formation of.

a)

Fe3 [Fe(CN)6 ]2

b)

Fe4 [Fe(CN)6 ]3

c)

Fe4 [Fe(CN)6 ]2

d)

Fe3 [Fe(CN)6 ]

20.

Lassaigne's test for the detection of nitrogen fails in

a)

H2 N - CO- NH.NH2 .HCl

b)

NH2 - NH2 . HCl

c)

C6 H5 - NH - NH2 . HCl

d)

C6 H5 CONH2

21.

Connect pair of compounds which give blue colouration / precipitate and white precipitate respectively, when their Lassaigne's test is separately done.

a)

NH2 NH2 HCl and ClCH2 -CHO

b)

NH2 CS NH2 and CH3 - CH2 Cl

c)

NH2 CH2 COOH and NH2 CONH2

d)

C6 H5 NH2 and ClCH2 - CHO.

22.

Sodium nitropruside reacts with sulphide ion to give a purple colour due to the formation of

a)

[Fe(CN)5 NO]3-

b)

[Fe(NO)5 CN]+

c)

[Fe(CN)5 NOS]4-

d)

[Fe (CN)5 NOS]3-

23.

An organic Compound weighing 0.15g gave on carius estimation, 0.12g of silver bromide. The percentage of bromine in the Compound will be close to

a)

46%

b)

34%

c)

3.4%

d)

4.6%

24.

A sample of 0.5g of an organic compound was treated according to Kjeldahl's method. The ammonia evolved was absorbed in 50mL of 0.5M H2 SO4 . The remaining acid after neutralisation by ammonia consumed 80mL of 0.5 MNaOH, The percentage of nitrogen in the organic compound is.

a)

14%

b)

28%

c)

42%

d)

56%

25.

In an organic compound, phosphorus is estimated as

a)

Mg2 P2 O7

b)

Mg3 (PO4 )2

c)

H3 PO4

d)

P2 O5

26.

Ortho and para-nitro phenol can be separated by

a)

azeotropic distillation

b)

destructive distillation

c)

steam distillation

d)

cannot be separated

27.

The purity of an organic compound is determined by

a)

Chromatography

b)

Crystallisation

c)

melting or boiling point

d)

both (a) and (c)

28.

A liquid which decomposes at its boiling point can be purified by

a)

distillation at atmospheric pressure

b)

distillation under reduced pressure

c)

fractional distillation

d)

steam distillation.

29.

Assertion: CH3 - C = CH - COOH is COOC2 H5 3- carbethoxy -2- butenoicacid. Reason: The principal functional group gets lowest number followed by double bond (or) triple bond.

a)

both the assertion and reason are true and the reason is the correct explanation of assertion.

b)

both assertion and reason are true and the reason is not the correct explanation of assertion.

c)

assertion is true but reason is false

d)

both the assertion and reason are false.

30.

What is the hybridisation state of benzyl carbonium ion?

a)

sp2

b)

spd2

c)

sp3

d)

sp2 d

31.

Decreasing order of nucleophilicity is

a)

OH- > NH2 - >- OCH3 > RNH2

b)

NH2 - > OH- >- OCH3 > RNH2

c)

NH2 - > CH3 O- > OH- > RNH2

d)

CH3 O- > NH2 - > OH- > RNH2

32.

Which of the following species is not electrophilic in nature?

a)

Cl+

b)

BH3

c)

H3 O+

d)

+NO2

33.

Homolytic fission of covalent bond leads to the formation of

a)

electrophile

b)

nucleophile

c)

Carbo cation

d)

free radical

34.

Hyper Conjugation is also known as

a)

no bond resonance

b)

Baker - nathan effect

c)

both (a)and (b)

d)

none of these

35.

Which of the group has highest +I effect?

a)

CH3 -

b)

CH3 -CH2 -

c)

(CH3 )2 -CH-

d)

(CH3 )3 -C-

36.

Which of the following species does not exert a resonance effect?

a)

C6 H5 OH

b)

C6 H5 Cl

c)

C6 H5 NH2

d)

C6 H5 NH3 +

37.

-I effect is shown by

a)

-Cl

b)

-Br

c)

both (a) and (b)

d)

-CH3

38.

Which of the following carbocation will be most stable?

a)

Ph3 C-+

b)

CH3 -CH2 +-

c)

(CH3 )2 -CH +

d)

CH2 =CH-CH2+

39.

Assertion: Tertiary Carbocations are generally formed more easily than primary Carbocations ions. Reason: Hyper conjugation as well as inductive effect due to additional alkyl group stabilize tertiary carbonium ions.

a)

both assertion and reason are true and reason is the correct explanation of assertion.

b)

both assertion and reason are true but reason is not the correct explanation of assertion.

c)

Assertion is true but reason is false

d)

Both assertion and reason are false

40.

Heterolytic fission of C-C bond results in the formation of

a)

free radical

b)

Carbanion

c)

Carbocation

d)

Carbanion and Carbocation

41.

Which of the following represent a set of nuclephiles?

a)

BF3 , H2 O, NH2-

b)

AlCl3 , BF3 , NH3

c)

CN- , RCH2 - , ROH

d)

H+, RNH3 +, :CCl2

42.

Which of the following species does not acts as a nucleophile?

a)

ROH

b)

ROR

c)

PCl3

d)

BF3

43.

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