What is the decreasing order of strength of bases
OH, NH₂^- H - C ≡ C and CH₃ - CH₂^-

(a)

OH^->NH₂^- >H-C≡C >CH₃^-CH₂^-

(b)

NH₂^->OH^->CH₃^-CH₂^- >H-C≡C

(c)

CH₃^-CH₂^->NH₂^->H-C≡C^->OH^-

(d)

OH^->H-C ≡ C^->CH₃^-CH₂^- >NH₂^-

With regard to the strength of acids and bases, Find the incorrect statement among the following.

(a)

Strong acid is one that completely dissociates in water

(b)

K_a is the dissociation constant

(c)

CH₃COOH is a weak acid

(d)

Smaller the K_a value, greater is the acid strength

A current strength of 3.86 A was passed through molten Calcium oxide for 41 minutes and 40 seconds. The mass of Calcium in grams deposited at the cathode is_______. (atomic mass of Ca is 40g / mol and 1F = 96500C).

(a)

4

(b)

2

(c)

8

(d)

6

Which of the statements about electrolytic conductance is not true?

(a)

Conductivity increases with decrease in viscosity.

(b)

Higher dielectric constant shows lower conductance in solution.

(c)

Temperature increases, conductance also increases.

(d)

Molar conductance increases with increase in dilution.

The most effective electrolyte for the coagulation of As₂S₃Sol is _______.

(a)

NaCl

(b)

Ba(NO₃)₂

(c)

K₃[Fe(CN)₆]

(d)

Al₂(SO₄)₃

Pick the odd one out.

(a)

dialysis

(b)

electro dialysis

(c)

electrophoresis

(d)

ultrafiltration

Tyndall effect is a _____ property of colloidal particles.

(a)

optical

(b)

kinetic

(c)

electrical

(d)

electronic

(CH₃)₃-C-CH(OH) CH₃ \(\overset { con{ H }_{ 2 }{ SO }_{ 4 } }{ \longrightarrow } \)X (major product)

(a)

(CH₃)₃ CCH = CH₂

(b)

(CH₃)₂C = C (CH₃)₂

(c)

CH₂= C(CH₃)CH₂-CH₂- CH₃

(d)

CH₂= C (CH₃) - CH₂- CH₂- CH₃

Among the following ethers which one will produce methyl alcohol on treatment with hot HI?

(a)

(H₃C)₃C-O-CH₃

(b)

(CH₃-)₂-CH-CH₂-O-CH₃

(c)

CH₃-(CH₂)₃-O-CH₃

(d)

CH₃-CH₂-\(\underset { \overset { | }{ { CH }_{ 3 } } }{ CH } \)-O-CH₃

Which one of the following would not react with cone. HCI and anhy. ZnCl₂ at room temperature?

(a)

(CH₃)₃COH

(b)

(CH₃)₂CHOH

(c)

\({ CH }_{ 3 }-{ CH }_{ 2 }-\underset { \overset { | }{ { CH }_{ 3 } } }{ CH } -OH\)

(d)

CH₃ - CH₂ - CH₂ - OH

 is __________

(a)

Mesitylene

(b)

Pyrogallol

(c)

Hydroxy quinol

(d)

Phluroglucinol

Assertion: 2,2 – dimethyl propanoic acid does not give HVZ reaction.
Reason: 2 – 2, dimethyl propanoic acid does not have \(\alpha\) - hydrogen atom
Codes:
A) if both assertion and reason are true and reason is the correct explanation of assertion.
B) if 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

(a)

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

(b)

if 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

Assertion: p – N, N – dimethyl amino benzaldehyde undergoes benzoin condensation
Reason: The aldehydic (-CHO) group is meta directing.
Codes:
A) if both assertion and reason are true and reason is the correct explanation of assertion.
B) if 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

(a)

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

(b)

if 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

Which among the carbonyl compounds cannot be prepared by Rosenmund reduction?

(a)

Ketones

(b)

Formaldehyde

(c)

Acetaldehyde

(d)

Both (a) and (b)

When aqueous solution of formaldehyde is evaporated to dryness it forms a polymer called _______.

(a)

paraldehyde

(b)

paraformaldehyde

(c)

bakelite

(d)

polyamide

Nitration of nitrobenzene results in

(a)

o-dinitrobenzene

(b)

1,3,5 trinitrobenzene

(c)

m-dinitrobenzene

(d)

p-dinitrobenzene

Nitromethane condenses with acetaldehyde to give

(a)

nitro propane

(b)

1-nitro-2-propanol

(c)

2-nitro-1-propanol

(d)

3-nitro propanol

The reagent that cannot be used for the conversion of C₆H₅NO₂ ➝ C₆H₅NH₂

(a)

Sn/HCI

(b)

LiAlH₄

(c)

H₂/Ni

(d)

Zn/NaOH

The intermediate formed in the nitration of benzene is _________

(a)

Arenium ion

(b)

Carbanion

(c)

Oxonium ion

(d)

Nitrite ion

In a protein, various amino acids linked together by ______.

(a)

Peptide bond

(b)

Dative bond

(c)

\(\alpha\) - Glycosidic bond

(d)

\(\beta\) - Glycosidic bond

A dipeptide does not have

(a)

two peptide units

(b)

portions of two amino acids

(c)

an amino group

(d)

salt like structure

Proteins are found to have two different type of secondary structures, a-helix and P pleated sheet structure a-helix structure of protein is stabilised by_________

(a)

peptide bond

(b)

vander Waalsforces

(c)

hydrogenbonds

(d)

dipole - dipole interaction

Pick out the wrong statement among the following.

(a)

Antipyretics is used to reduce the body temperature

(b)

Analgesics are drugs used to relieve pain

(c)

Milk of magnesia is used to relieve symptoms of heat burn

(d)

Tetracyclines are antifertility drugs

Addition polymerisation is also called as _______ polymerisation.

(a)

chain growth

(b)

condensation

(c)

step growth

(d)

none of the above

Which is not an artificial sweetener is ______

(a)

Dulcin

(b)

Nectarin

(c)

Sucralose

(d)

Sodium benzoate