NEET Test 117

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NEET Test 117

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Weekly Quiz Competition

Question 1
4 / -1

A current of 0.75A is passed through an acidic solution of CuSO₄ for 10 minutes. The volume of oxygen liberated at anode (at STP) will be:

A
26.11 mL

B
26.16 mL

C
39.15 mL

D
52.2 mL

Solution
Question 2
4 / -1

The mond's process is used for the

A
Extraction of Mo

B

C

D
Extraction of Zn

Solution

The mond's process is used for refining of nickel as per following reaction.

Hence, the correct option is (B).
Question 3
4 / -1

This graph indicates:

A
Stabilizing selection

B
Directional selection

C
Disruptive selection

D
Industrial melanism

Solution

Stabilizing selection is a type of natural selection that favors the average individuals in a population. This process selects against the extreme phenotypes and instead favors the majority of the population that is well adapted to the environment. Stabilizing selection is often shown on a graph as a modified bell curve that is narrower and taller than the norm.

Hence, the correct option is (A).
Question 4
4 / -1

lodoform test is not given by:

A
Ethanal

B
Ethanol

C
2-pentanone

D
3-pentanone

Solution

Ethyl alcohol, 2-alkanols and carbonyl compounds containing group show iodoform test, i.e., acetaldehyde and 2-ketones etc. So iodoform test is not given by 3-pentanone.

Hence, the correct option is (D).
Question 5
4 / -1

Animal with pseudocoelom is

A
Leech

B
Liver Fluke

C
Jelly Fish

D
Hook worm

Solution

Ancyclostoma (hook worm) is a parasitic nematode. Nematodes are characterized by pseudocoelomate. Pseudocoelom means false body cavity. These animals cavity between the germ layers (mesoderm) and the gut.

Hence, the correct option is (D)
Question 6
4 / -1

The oesophagus of the cockroach opens up into a sac like structure called the ____________.

A
Gizzard

B
Hepatic caecae

C
Crop

D
Proventriculus

Solution

The oesophagus of the cockroach opens up into a sac like structure called the crop.

The crop is followed by the gizzard or proventriculus. Gizzard is thick walled, muscular and conical bulbous structure. It has an outer thick layer of circular muscles and a thick, inner cuticle forming six highly chitinous plates called teeth.

Hence, the correct option is (C).
Question 7
4 / -1

Formation of gametophyte directly from spore mother cell, without meiosis is called as:

A
Apospory

B
Apogamy

C
Apomictic

D
Apomixis

Solution

Apospory is defined as the development of the gametophyte from the sporophyte without the formation of spores. The spore mother cell does not undergo meiosis. It is otherwise defined as the development of an embryo of a flowering plant outside the embryo sac, from a cell of the nucellus or chalaza.

Hence, the correct option is (A).
Question 8
4 / -1

When the plane surface of a plano-convex lens of refractive index 1.5 is silvered, it behaves like a concave mirror of focal length 30cm. When its convex surface is silvered, it will behave like a concave mirror of focal length

A
10 cm

B
20 cm

C
30 cm

D
45 cm

Solution

Let power of lens = P_L

Power of mirror = P_M

In case of silvering plane surface, refraction will take place through curve part twice, and reflection will take place through plane part once.

In case of silvering convex surface, refraction will take place via the plane part twice and reflection will take place through curve part once.

P_L= 0 here as plane part won't refract like a lens.

Hence, the correct option is (C).
Question 9
4 / -1

Which of the following waves can be transmitted through solids, liquids, and gases?

A
Transverse waves

B
Electromagnetic waves

C
Mechanical waves

D
Longitudinal waves

Solution

Longitudinal waves involve changes in the volume and density of the medium. Since all media can sustain compressive stress, longitudinal waves can be transmitted through all three types of media.

Hence, the correct option is (D).
Question 10
4 / -1

Intermediate product of hydrolysis of cyanide is:

A

B

C

D

Solution

Intermediate product of hydrolysis of cyanide is RCONH₂ as shown in below given reaction:

Hence, the correct option is (B).