NEET Test 162

Result

NEET Test 162

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Weekly Quiz Competition

Question 1
4 / -1

For a concentrated solution of a weak electrolyte (K_eq= equilibrium constant) A₂ B₃ of concentration ' c ', the degree of dissociation " α ' is

A

B

C

D

Solution
Question 2
4 / -1

In Young's double slit experiment, if the distance between the slits and the screen is doubled and the separation between the slits is reduced to half, the fringe width

A
Is doubled

B
Becomes four times

C
Is halved

D
Remains unchanged

Solution

Thus, when the double slit experiment the distance between the slits and the screen is doubled and the separation between the slits is reduced to half, the fringe width becomes four times.
Question 3
4 / -1

Which of the following is incorrect regarding skeleton muscles?

A
They have a striped appearance under the microscope.

B
They are involved in changes in body postures.

C
They are also known as striated, voluntary muscles.

D
They are found in the inner walls of hollow organs.

Solution

Smooth muscle cells are found in the walls of hollow organs, including the stomach, intestines, urinary bladder and uterus, and in the walls of passageways, such as the arteries and veins of the circulatory system, and the tracts of the respiratory, urinary, and reproductive systems.
Question 4
4 / -1

Inflammatory substance produced during allergic reactions by mast cells is

A
Histamine

B
Heparin

C
Serotonin

D
Fibrinogen

Solution

Inflammatory substance produced during allergic reactions by mast cells is Histamine

Mast cell contain granules of heparin and histamine. Histamine produces inflammation increases permeability of blood vessels, activates blood platelets and causes contraction of smooth muscles. Heparin prevents blood clotting.
Question 5
4 / -1

Bone forming cells are:

A
Osteoblasts

B
Osteoclasts

C
Chondroblasts

D
Chondroclasts

Solution

Osteoblasts are bone forming cells. It produces matrix which later becomes mineralized. Osteoclasts are cells that break bone. Bone mass is maintained by balancing osteoblasts and osteoclasts process. Chondroblasts are cells which form chondrocytes in the cartilage matrix. Chondroclasts are cells which reabsorb calcified cartilage.
Question 6
4 / -1

_______________ is an edible underground stem.

A
Potato

B
Groundnut

C
Sweet potato

D
Carrot

Solution

The pericarp of the fruit is hard but an edible part of fruit is seed. Non edible parts include root, stem and leaf of groundnut. Edible part of potato is modified underground stem which is helpful in storage of food.
Question 7
4 / -1

According to Newton's law of cooling, the rate of cooling of a body is proportional to Δθⁿ, where Δθ is the temperature difference between the body and the surroundings, and n is equal to

A
2

B
3

C
4

D
1

Solution

According to Newton's law of cooling, as the rate of cooling is directly proportional to the temperature difference between the body and the surroundings

The temperature of many objects can be modelled using a differential equation. Newton's law of cooling (or heating) states that the temperature of a body

temperature between the body and its surroundings. It is a reasonably accurate approximation in some circumstances.

More precisely, let T denote the temperature of an object and T₀ the ambient temperature. If t denotes time, then Newton's law states that,
Question 8
4 / -1

Consider a wire with density (d) and stress (σ). For the same density, if the stress increases 2 times, the speed of the transverse waves along the wire changes by:

A

B

C
2

D
1/2

Solution
Question 9
4 / -1

Which among the following is not the basis of classification in Animalia?

A
Segmentation

B
Symmetry

C
Mode of nutrition

D
Levels of organization

Solution

Levels of organization, symmetry, arrangement of cells in embryo, presence of coelom, segmentation and presence of notochord are the basis for the classification in Animalia. Since all the animals are heterotrophic, there is no need to classify Animalia based on their mode of nutrition.
Question 10
4 / -1

A rod of length (L)15 m is rotating about an axis passing through its one end and velocity at a point which is at L/3 distance from the axis is 15 m/s. Find the linear velocity of the free end of the rod.

A
45 m/s

B
40 m/s

C
30 m/s

D
20 m/s

Solution