NEET Test 152

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NEET Test 152

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Weekly Quiz Competition

Question 1
4 / -1

A buffer solution contains of water is added to this solution. 𝑝𝐻 before and after dilution are: (𝑝𝐾𝑎 = 4.74,log⁡4 = 0.602)

A
5.04,5.04

B
5.04,0.504

C
5.34,0.534

D
5.34,5.34

Solution

Dilution has no effect on 𝑝𝐻 of buffer solution hence 𝑝𝐻 (after dilution) = 5.34
Question 2
4 / -1

Volume of 0.1M K₂Cr₂O₇ required to oxidize 35ml of 0.5M FeSO₄ solution is:

A
29.2ml

B
145ml

C
175ml

D
58.9ml

Solution
Question 3
4 / -1

Aspherical balloon of 21 𝑐𝑚 diameter is to be filled up with 𝐻₂ at 𝑁𝑇𝑃 from a cylinder containing the gas at 20 𝑎𝑡𝑚 at 27^∘𝐶. The cylinder can hold 2.82 liters of water at 𝑁𝑇𝑃. Calculate the number of balloons that can be filled up.

A
50

B
20

C
25

D
10

Solution
Question 4
4 / -1

Which of the following would happen if the supply of is decreased to an illuminated wheat plant?

A
Its photosynthesis would decrease

B
Its respiration would increase

C
Its photosynthesis would increase

D
All the physiological process would stop

Solution

The act of converting optical energy into chemical energy by living cells takes carbon dioxide from the air in the presence of sunlight and water from the ground to form complex organic foods such as carbohydrates and excrete oxygen gas (O₂). If the amount of oxygen in the atmosphere decreases then photosynthesis will increase in cycle (wheat) and no change in cycle.
Question 5
4 / -1

In a chemical equilibrium a + b give rise to c + d when 1 mole each of the two reactants are mixed 0.4 mole each of the products are formed. The equilibrium constant is:

A

B

C

D

Solution

Given:

In a chemical equilibrium a + b = c + d when one mole each of the two reactant are mixed 0.4 moles each of the product are formed

From given, we have,

A chemical equilibrium

a + b = c + d

The equilibrium constant,

When one mole each of the two reactants are mixed 0.4 moles each of the product is formed

1 mole =𝑥 reactants +0.4 products

1 mole −0.4 products = 𝑥 reactants

𝑥 reactants = 0.6 moles

Therefore, when [c] = [d] = 0.4 moles

[𝑎] = [𝑏] = 0.6 moles

Therefore, the equilibrium constant,
Question 6
4 / -1

Which of the following genetically engineered microbe is used in scavening of oil spills by digesting hydrocarbons of crude oil?

A
Pseudomonas fluorescence

B
Rhizobium meliloti

C
Pseudomonas putida

D
Trichoderma

Solution

Pseudomonas putida is used in scavening of oil spills by digesting hydrocarbons of crude oil.

Pseudomonas putida is a Gram-negative, rod-shaped, saprotrophic soil bacterium. Based on 16S rRNA analysis, P. putida was taxonomically confirmed to be a Pseudomonas species and placed, along with several other species, in the P. putida group, to which it lends its name.
Question 7
4 / -1

An electron moves along the line PQ, which lies in the same plane as a circular loop of conducting wire, as shown in the figure. What will be the direction of the induced current, if any, in the loop?

A
Anticlockwise

B
Clockwise

C
Alternating

D
No current will be induced in the loop.

Solution

If electron is moving from left to right, the flux linked with will first increase and then decrease as the electron passes by. So the induced current in the loop will be first anticlockwise and will change direction as the electron passes by.
Question 8
4 / -1

Axial skeleton comprises 80 bones. Which of the following is/are not a part of axial skeleton?

A
Ribs

B
Sternum

C
Bones of the limbs

D
Vertebral column

Solution

The axial skeleton supports the head, neck, back, and chest and thus forms the vertical axis of the body. It consists of the skull, vertebral column (including the sacrum and coccyx), and the thoracic cage, formed by the ribs and sternum.
Question 9
4 / -1

Pollen kit is generally found in _______________.

A
Anemophilous flowers

B
Entomophilous flowers

C
Ornithophilous flowers

D
Hydrophilous flowers

Solution

Pollen kit is generally found in entomophilous flowers.

In the pollen grains of an insect pollinated plant, the exine is covered by a yellowish, viscous, sticky and oily layer called pollen kit. It is made up of lipids and carotenoids. Pollen kit is secreted by tapetum.
Question 10
4 / -1

If two soap bubbles of different radii are connected by a tube:

A
Air flows from the bigger bubble to the smaller bubble till the sizes become equal

B
Air flows from bigger bubble to the smaller bubble till the sizes are interchanged

C
Air flows from the smaller bubble to the bigger

D
There is no flow of air

Solution

Since excess pressure inside an air bubble of radius the smaller bubble has higher pressure. Hence air flows from smaller bubble to larger bubble.