Chemistry Test

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Chemistry Test - 27

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Weekly Quiz Competition

Question 1
1 / -0

Which set of quantum numbers are not possible:-

n l m s

A
3 ,2, 0, +1/2

B
2, 2 ,1 ,+1/2

C
1 ,0, 0, -1/2

D
3, 2 ,-2, +1/2

Solution

2, 2, 1 ,+1/2

Hence correct answer is option B
Question 2
1 / -0

Which one of the following characteristics of the transition metals is associated with their catalytic activity?

A
variable oxidation states

B
paramagnetic behaviour

C
colour of hydrated ions

D
high enthalpy of atomisation

Solution

Ans (A) variable oxidation states

Due to large surface area and variable oxidation state, d-block element shows catalytic activities.
Question 3
1 / -0

Which one of the following is a chain growth polymer?

A
starch

B
protein

C
nucleic acid

D
polystyrene

Solution

Ans -polystyrene

Polystyrene is achain growth polymer. Polystyrene results when styrene monomers interconnect
Question 4
1 / -0

Which nobel gas is most soluble in water?

A
Ar

B
Xe

C
He

D
Ne

Solution

The solubility of the nobel gas in water is due to dipole-induced dipole interactions.As the size of the atom increases the magnitude of dipole-induced dipole interactions increases.Thus the solubility increases from He to Rn.Among all the given options Xe is most soluble in water
Question 5
1 / -0

Among all the options in which compound chromium has +6 oxidation state?

A
${Cr}_{2} {({SO}_{4})}_{3}$

B
$K_{2} {Cr}_{2} O_{7}$

C
${CrCl}_{3}$

D

none of these

Solution

$K^{\oplus}\left[C r O_{3} C l\right]^{*}:$ Oxidation state of $C r=+6$
Question 6
1 / -0

Which of the following gases does not obey Henry’s law?

A
N₂

B
O₂

C
CO₂

D
none of these

Solution

none of these

Hence correct answer is option D
Question 7
1 / -0

Which of the following pairs represents stereoisomerism?

A
structural isomerism and geometric isomerism

B
optical isomerism and geometric isomerism

C
chain isomerism and rotational isomerism

D
linkage isomerism and geometric isomerism

Solution

Optical isomerism and geometric isomerism

Hence correct answer is option B
Question 8
1 / -0

Find the correct order of acidic strength amongst the following-

A
RCOOH>ROH>HOH>HC≡CH

B
RCOOH>HOH>ROH>HC≡CH

C
RCOOH>HOH>HC≡CH>ROH

D
RCOOH>HC≡CH>HOH>ROH

Solution

The correct order of acidic strength amongst the following-

RCOOH>HOH>ROH>HC≡CH
Question 9
1 / -0

Reaction of HBr with propene in the presence of peroxide gives?

A
3-bromo propane

B
allyl bromide

C
isopropyl bromide

D
n-propyl bromide

Solution

Ans (D) n-propyl bromide

Hydrogen Halides likeHBrusuallyreactwith alkenes using an electrophilic addition mechanism. However, in thepresenceof organicperoxides,HBradds to the carbon across the double bond which carries a lesser number of hydrogen atoms. ... This is calledperoxideeffect or Anti-Markovnikovs rule.
Question 10
1 / -0

Natural rubber is a polymer of-

A
ethyne

B
isoprene

C
butadiene

D
styrene

Solution

Ans-isoprene

Natural rubber is a polymer, a long, chain like molecule that contains repeating subunits. The termpolymercomes from the Greek “poly” meaning many and “mer” meaning parts. The chemical name fornatural rubberis polyisoprene. The monomer (meaning “one-part”) from which it is built is isoprene

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Chemistry Test - 27

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Chemistry Test - 27

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Question 1

3 ,2, 0, +1/2

2, 2 ,1 ,+1/2

1 ,0, 0, -1/2

3, 2 ,-2, +1/2

Solution

Question 2

variable oxidation states

paramagnetic behaviour

colour of hydrated ions

high enthalpy of atomisation

Solution

Question 3

starch

protein

nucleic acid

polystyrene

Solution

Question 4

Ar

Xe

He

Ne

Solution

Question 5

Cr2SO43

K2Cr2O7

CrCl3

none of these

Solution

Question 6

N2

O2

CO2

none of these

Solution

Question 7

structural isomerism and geometric isomerism

optical isomerism and geometric isomerism

chain isomerism and rotational isomerism

linkage isomerism and geometric isomerism

Solution

Question 8

RCOOH>ROH>HOH>HC≡CH

RCOOH>HOH>ROH>HC≡CH

RCOOH>HOH>HC≡CH>ROH

RCOOH>HC≡CH>HOH>ROH

Solution

Question 9

3-bromo propane

allyl bromide

isopropyl bromide

n-propyl bromide

Solution

Question 10

ethyne

isoprene

butadiene

styrene

Solution

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${Cr}_{2} {({SO}_{4})}_{3}$

$K_{2} {Cr}_{2} O_{7}$

${CrCl}_{3}$

N₂

O₂

CO₂