NEET Test 200

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NEET Test 200

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Weekly Quiz Competition

Question 1
4 / -1

In chromyl chloride, the number of d-electrons present on chromium is same as in (Given at no. of Ti : 22, V: 23, Cr : 24, Mn : 25, Fe : 26)

A
Fe (III)

B
V (IV)

C
Ti (III)

D
Mn (VII)

Solution
Question 2
4 / -1

Which of the following is true for the resultant polymer product formed, when molecules of phthalic acid react with molecules of glycerol?

A
Branch polymer

B
Cross-link polymer

C
Linear polymer

D
None of the mentioned

Solution

The reaction between pthalic acid and glycerol initially results into linear or branched polymer but, due to trifunctionality of glycerol, ultimately cross-linking takes place between the molecules.
Question 3
4 / -1

On the basis of mode of formation polymers can be classified:

A
As addition polymers only

B
As condensation polymers only

C
As copolymers

D
As addition and condensation polymers

Solution

On the basis of the mode of their formation, the polymers can be classified as addition polymers and condensation polymers.

In addition, polymers are formed by chain-growth polymerization and condensation polymers are formed by the combination of two monomers by the elimination of a small molecule like water or methyl alcohol.
Question 4
4 / -1

A long solenoid of diameter 0.1m has 2 × 10⁴ turns per metre. At the centre of the solenoid, a coil of 100 turns and radius 0.01m is placed with its axis coinciding with the solenoid axis. The current in the solenoid reduces at a constant rate to 0A from 4A in 0.05s. If the resistance of the coil is 10π²Ω, the total charge flowing through the coil during this time is:

A
π²

B
32π²

C
4π²

D
32μC

Solution
Question 5
4 / -1

Which of the following gases has maximum rms speed at a given temperature?

A
Hydrogen

B
Nitrogen

C
Oxygen

D
Carbon dioxide

Solution

The rms speed of the gas is given by:

It means that the rms speed is inversely proportional to the molecular mass. Therefore, the gas with the lowest molecular mass will have maximum rms speed.

Hydrogen has the lowest molecular mass as compared to other gases. So, it will have maximum rms speed.
Question 6
4 / -1

Which of the following oxoacid contains more than one S − S bonds?

A
Dithionic acid

B
Thiosulphorus acid

C
Polythionic acid

D
Peroxodisulphuric acid

Solution

Polythionic acid contains more than one S − S bond.

Dithionic (H₂ S₂O₆) acid and Thiosulphorus (H₂ S₂O₂) acid both have 1 S − S bond while peroxydisulphuric acid do not have any S − S bond.
Question 7
4 / -1

Which one of the following statements is incorrect?

A
Birds and land snails are uricotelic animals.

B
Mammals and frogs are ureotelic animals.

C
Aquatic amphibians and crustaceans are ammonotelic animals.

D
Birds and reptiles are ureotelic.

Solution

Ammonotelic organisms include aquatic animals which excrete nitrogenous waste as soluble ammonia. Ureotelic organisms include fish, amphibians, mammals including humans which excrete excess nitrogen as urea. While the uricotelic organisms include reptiles like lizards, snakes and birds which excrete uric acid or salts that are least soluble in water.
Question 8
4 / -1

In Cannabis, pollination is carried out by:

A
Bats

B
Insects

C
Birds

D
Wind

Solution

Anemophily is the process of pollination by wind and is seen in Cannabis plants. Cannabis produces a well-exposed colorless flower and a large number of small pollen grains (around 5 lac pollens from the single flower) with hairy style and stigma.
Question 9
4 / -1

Which of the following pairs of a chemical reaction is certain to result in a spontaneous reaction ?

A
Exothermic and increasing disorder

B
Exothermic and decreasing disorder

C
Endothermic and increasing disorder

D
Endothermic and decreasing disorder

Solution
Question 10
4 / -1

Which of the following multicellular animals does not have nerve cells or neurons to respond to stimuli?

a. Anemone

b. Sponge

c. Hydra

A
Only a

B
Only b

C
Only c

D
Only a and b

Solution

Sponges have no nervous system or organs like most animals do. While adult sponges are not mobile, they are able to react to certain physical stimuli despite lacking conventional organs and sensory systems. Sponges have no nerves or brain, so they lack any ability to cognitively control their movement.

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NEET Test 200

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NEET Test 200

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Question 1

Fe (III)

V (IV)

Ti (III)

Mn (VII)

Solution

Question 2

Branch polymer

Cross-link polymer

Linear polymer

None of the mentioned

Solution

Question 3

As addition polymers only

As condensation polymers only

As copolymers

As addition and condensation polymers

Solution

Question 4

π2

32π2

4π2

32μC

Solution

Question 5

Hydrogen

Nitrogen

Oxygen

Carbon dioxide

Solution

Question 6

Dithionic acid

Thiosulphorus acid

Polythionic acid

Peroxodisulphuric acid

Solution

Question 7

Birds and land snails are uricotelic animals.

Mammals and frogs are ureotelic animals.

Aquatic amphibians and crustaceans are ammonotelic animals.

Birds and reptiles are ureotelic.

Solution

Question 8

Bats

Insects

Birds

Wind

Solution

Question 9

Exothermic and increasing disorder

Exothermic and decreasing disorder

Endothermic and increasing disorder

Endothermic and decreasing disorder

Solution

Question 10

Only a

Only b

Only c

Only a and b

Solution

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π²

32π²

4π²