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Chemistry Unit-10 Test

Total questions: 40

Worksheet time: 3600secs

Name
Class
Date
1.

Which of the following produce CO2 while reacting with sodium carbonate

a)

Alcohol

b)

Water

c)

Carboxylic acid

d)

All of these

2.

When a carboxylic acid is protonated, protonation occurs at

a)

Hydroxyl oxygen atom

b)

Carbonyl oxygen atom

c)

Hydroxyl hydrogen atom

d)

Carbonyl carbon atom

3.

Formation of ethanoyl chloride from ethanoic acid is an example of:

a)

Electrophilic addition

b)

Electrophilic substitution

c)

Nucleophilic addition

d)

Nucleophilic substitution

4.

By which of the following condition proteins do not denature

a)

Adding 10% glucose solution

b)

Heating

c)

Changing in pH

d)

Oxidizing conditions

5.

In secondary structure of protein, hydrogen bonding is present between

a)

NH and C=O

b)

– SH and C=O

c)

– NO and C – H

d)

NH2 and SH

6.

The IUPAC name of phthalic acid is

a)

Pentanoic acid

b)

Butenedioic acid

c)

1,2-benzenedicarboxylic acid

d)

2,4,6-trinitrotoluene

7.

– COOH is reduced to – CH3 in the presence of

a)

Ni/H2

b)

HI / P

c)

Acidified KMnO4

d)

LiAlH4

8.

A protein assumes at least

a)

25 types of amino acids

b)

2 polypeptide chains

c)

3 structural levels

d)

1 structural level

9.

The molecular weight of protein is

a)

> 1000 amu.

b)

> 10000 amu.

c)

< 1000 amu.

d)

< 10000 amu.

10.

Amino acid monomers that form chain with peptide linkage by releasing a water

molecule occurs in

a)

Addition polymerization

b)

Substitution polymerization

c)

Condensation polymerization

d)

All of them

11.

Acetic acid exists as cyclic dimer in benzene due to ____________ with __________ atoms in the ring

a)

Hydrogen bonding, Eight

b)

Covalent bond, Three

c)

Dipole-Dipole force, Eight

d)

Hydrogen bonding, Three

12.

Weaker acid among the following is

a)

FCH2COOH

b)

BrCH2COOH

c)

ClCH2COOH

d)

ICH2COOH

13.

Ethanoic acid reacts with all of these to produce water except

a)

Ethanol

b)

Caustic soda

c)

Sodium

d)

Sodium hydrogen carbonate

14.

Carboxylic acid can be prepared by the action of Grignard’s reagent with

a)

O2

b)

CO2

c)

KCl

d)

N2

15.

Aromatic carboxylic acid can be prepared by the oxidation of alkyl benzene, when treated with _________

a)

Alkaline KMnO4

b)

Acidic K2Cr2O7

c)

Dilute HNO3

d)

All can be used

16.

Which is not the function of proteins

a)

Nucleoproteins serves as carriers of heredity

b)

Some proteins act as hormones

c)

They take an essential part in formation of protoplasm

d)

All are functions of proteins

17.

Conversion of fumaric acid to maleic acid in the presence of fumarase enzyme. This is an example of

a)

Isomerases

b)

Hydrolases

c)

Lyases

d)

Ligases

18.

Which of the following gives electrophilic substitution reaction with carboxylic acid

a)

Na

b)

NaOH

c)

PCl5

d)

Both ‘A’ and ‘B’

19.

Which of the following name is correct for given compound:

a)

Isobutyric acid

b)

α – Methyl Propionic acid

c)

2 – Methyl propanoic acid

d)

All of these

20.

When ethanoic acid reacts with PCl5, the products formed are ________

a)

CH3COCl+HCl

b)

CH3CH2Cl+POCl3+HCl

c)

CH3COCl+H3PO4+HCl

d)

CH3COCl+POCl3+HCl

21.

Carboxylic acids are dehydrated on heating strongly in the presence of phosphorous pentoxide product will be _________

a)

Acid amide

b)

Acid anhydride

c)

Alkyl amine

d)

Alkane nitrile

22.

Ammonium acetate converts to acetamide by

a)

A) Cooling

b)

B) Dehydration

c)

C) Heating

d)

D) Both “B” and “C

23.

Among the following acids which is less soluble in water

a)

CH3COOH

b)

HCOOH

c)

CH3(CH2)2COOH

d)

CH3CH2COH

24.

Which of the following is not a fatty acid

a)

A) Succinic acid

b)

B) Palmitic acid

c)

C) Stearic acid

d)

Both B and C

25.

If amyl acetate is added to a liquid, it will develop a flavor of.

a)

Banana

b)

Jasmine

c)

Pineapple

d)

Apricot

26.

When acetic acid react with 46g Na,           mole of H2 gas will be produced

a)

Half

b)

Two

c)

Four

d)

One

27.

Acidic hydrolysis of propanenitrile yield a compound “X”. When “X” is treated with HI/P is gives.

a)

1-Propanol

b)

Ethane

c)

Propane

d)

Propanoic acid

28.

Correct name of

a)

A) Acetamide

b)

B) Ethanamide

c)

C) Ethanal amine

d)

Both A and B

29.

The activity of enzyme is best at or around the temperature

a)

310K

b)

37K

c)

273K

d)

25oC

30.

The main structural feature of protein is

a)

Ester linkage

b)

Peptide linkage

c)

Ether linkages

d)

Glycosylic linkage

31.

General formula for the carboxylic acid is CnH2n+1COOH. What is the value of “n” here for formic acid.

a)

1

b)

2

c)

3

d)

0

32.

By oxidation of which compound carboxylic acid can not be obtained

a)

2–Methyl-2-propanol

b)

1–Butanol

c)

2–Butanol

d)

3–Propanol

33.

Proteins are macro molecules that mostly contain

a)

Single type of monomer

b)

Single type of amino-acid

c)

Single type of C-C bonds

d)

Single type of chain length between two consecutive peptide bonds

34.

The helical structure of protein is stabilized by

a)

Ether bond

b)

Peptide bonds

c)

Dipeptide

d)

Hydrogen bonds

35.

Denaturation of protein is caused by

a)

Change the temperature

b)

Change the pH

c)

Change the heat

d)

All of these

36.

An acid with unpleasant smell

a)

Formic acid

b)

Acetic acid

c)

Propanoic acid

d)

Butyric acid

37.

Which of the following is not an ester

a)

Amyl acetate

b)

Sodium butyrate

c)

Isobutyl formate

d)

Octyl acetate

38.

Which of the following is electrophilic substitution reaction of carboxylic acid

a)

Acyl formation

b)

Salt formation

c)

Ester formation

d)

Acid amide formation

39.

The general formula for aliphatic monocarboxylic acid is

a)

CnH2nO2

b)

CnH2n+2O

c)

CnH2nO

d)

CnH2n

40.

Which of the following carboxylic acid has highest pKa value

a)

Formic acid

b)

Acetic acid

c)

Propionic acid

d)

Butyric acid

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