Chemistry Test

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Chemistry Test - 30

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following molecule does not exist?

A
PH₅

B
NH₃

C
SH₂

D
PH₃

Solution

PH₅

since $^{\prime} H^{\prime}$ is less electronegative, so it can't exert charge contraction in $^{\prime} P^{\prime}$ do not extend its
valency to $5,$ So $P H_{5}$ do not exists.
Question 2
1 / -0

Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?

A
freons

B
polyhalogens

C
fullerenes

D
ferrocenes

Solution

Freons are chlorofluorocarbons and areresponsible for depletionofozone layer.
Question 3
1 / -0

White lead is?

A
${Pb}_{3} O_{4}$

B
$2 {PbCO}_{3} \cdot Pb (OH)_{2}$

C
PbO

D
$Pb (CH 3 COO) 2 . Pb (OH)_{2}$

Solution

$2 {PbCO}_{3} \cdot Pb (OH)_{2}$

Hence correct answer is option B
Question 4
1 / -0

No. of chiral carbon atoms in β -D + glucose is-

A
3

B
4

C
5

D
6

Solution

No. of chiral carbon atoms in β -D + glucose is 5

Hence correct answer is option C
Question 5
1 / -0

Which of the following halogens can be introduced into the benzene ring via diazonium salts-

A
Cl

B
B

C
F

D
All of these

Solution

All of these can be introduced into the benzene ring via diazonium salts .
Question 6
1 / -0

Glycolysis is?

A
oxidation of glucose to pyruvate

B
conversion of glucose to haem

C
oxidation of glucose to glutamate

D
Conversion of pyruvate to citrate

Solution

Glycolysis: oxidizesglucoseto formpyruvate. Catabolic pathway during which a 6 carbonglucosemolecule is split into two 3 carbon sugars which are thenoxidizedand rearranged by a step-wise metabolic process that produces two molecules ofpyruvic acid.
Question 7
1 / -0

Lanthanides are –

A
14th elements in the seventh period (atomic no. =90 to 103) that are filling 5f sub-level

B
14th elements in the seventh period (atomic no. = 58 to 71) that are filling 4f sub-level

C
14th elements in the sixth period (atomic no. = 90 to 103) that are filling 4f sub-level

D
14th elements in the sixth period (atomic no. = 58 to 71) that are filling 4f sub-level

Solution

Lanthanides are 14th elements in the sixth period (atomic no. = 58 to 71) that are filling 4f sub-level

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

Which of the following shows linear structure?

A
CCl₄

B
ethene

C
acetylene

D
ethane

Solution

Ans -acetylene

Acetylene (H -C ≡ CH) has linear structure.In acetylene, each carbon used its 2s, and one of its 2p orbitals to undergo sp hybridization. The two hybrid orbitals are inclined to each other at an angle of 180⁰.
Question 9
1 / -0

At a certain pressure, volume of a gas at 27⁰C is 20 litre.If the pressure and temperature at doubled,its volume will be-

A
8.2 litre

B
20 litre

C
10.9 litre

D
40 litre

Solution

PV =Nrt

P X 20 = nR x T

When the pressure and temperature are doubledP x V = nR X 2T

P x 20 =Nrt

Thus volume will remain same
Question 10
1 / -0

Wood charcoal is used to decolourise sugar because it-

A
adsorbs decolourised material

B
adsorbs coloured material

C
reduces coloured material

D
none of these

Solution

Wood charcoal is used to decolourise sugar because it adsorbs coloured material .

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Chemistry Test - 30

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Chemistry Test - 30

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Question 1

PH5

NH3

SH2

PH3

Solution

Question 2

freons

polyhalogens

fullerenes

ferrocenes

Solution

Question 3

Pb3O4

2PbCO3·Pb(OH)2

PbO

Pb(CH3COO)2.Pb(OH)2

Solution

Question 4

3

4

5

6

Solution

Question 5

Cl

B

F

All of these

Solution

Question 6

oxidation of glucose to pyruvate

conversion of glucose to haem

oxidation of glucose to glutamate

Conversion of pyruvate to citrate

Solution

Question 7

14th elements in the seventh period (atomic no. =90 to 103) that are filling 5f sub-level

14th elements in the seventh period (atomic no. = 58 to 71) that are filling 4f sub-level

14th elements in the sixth period (atomic no. = 90 to 103) that are filling 4f sub-level

14th elements in the sixth period (atomic no. = 58 to 71) that are filling 4f sub-level

Solution

Question 8

CCl4

ethene

acetylene

ethane

Solution

Question 9

8.2 litre

20 litre

10.9 litre

40 litre

Solution

Question 10

adsorbs decolourised material

adsorbs coloured material

reduces coloured material

none of these

Solution

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PH₅

NH₃

SH₂

PH₃

${Pb}_{3} O_{4}$

$2 {PbCO}_{3} \cdot Pb (OH)_{2}$

$Pb (CH 3 COO) 2 . Pb (OH)_{2}$

CCl₄