NEET Test 135

Result

NEET Test 135

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
4 / -1

Coordination number of Nickel in [Ni (C₂O₄)]⁻⁴ is:

A
3

B
6

C
4

D
8

Solution

The coordination number of Nickel in [Ni (C₂O₄)]⁻⁴ is 6.

Oxalate is an example for bidentate ligand, three oxalate ligands form sixcoordinate bonds around the Ni²⁺ ion.

Since C₂O₄⁻³ is a bidentate ligand and these ligands are 3 in number. So, co-ordinate number of Nickel in [Ni (C₂O₄)₃]^4- is: 3 x 2 = 6
Question 2
4 / -1

Which of the following statements is correct?

A
All mammals have placenta

B
All Chondrichthyes are marine animals with a streamlined body with some exceptions

C
Larva of all cyclostomes return to freshwater after metamorphosis

D
Chelone and Testudo are able to maintain a constant body temperature

Solution

Chondrichthyes: These are marine animals with a streamlined body and cartilaginous endoskeletal. A placental mammal (subclass Eutheria), any member of the mammalian group, is recognized by the presence of a placenta, which facilitates the exchange of nutrients and wastes between the blood of the mother and the fetus. Invertebrates include all living mammals, except marsupials and monotremes. Cyclostomes are marine, but they migrate to fresh water for spawning. After spawning, within a few days, they die. After metamorphosis, their larvae return to the ocean. Kilons and testudos (reptiles) are not able to maintain a constant body temperature.
Question 3
4 / -1

Which of the following is a variety of 'cowpea'?

A
Himgiri

B
Pusa Swarnim

C
Pusa Shubhra

D
Pusa Komal

Solution

Pusa Komal is a crop variety of cowpea. It is resistant to bacterial blight.

All cultivated cowpeas are found within the universally accepted V. unguiculata subspecies unguiculata classification, which is then commonly divided into four cultivar groups: unguiculata, biflora, sesquipedalis, and textiles.
Question 4
4 / -1

For preparing a buffer solution of pH6 by mixing sodium acetate and acetic acid, the ratio of the concentrations of salt and acid should be (Ka = 10^-5)

A
1 : 10

B
1 : 1

C
10 : 1

D
1 : 100

Solution
Question 5
4 / -1

In the given reaction

A and B will respectively be:

A

B

C

D

Solution

Compound is β -hydroxy aldehyde hence the reaction is aldol addition. A and B can be known by retro aldol addition as follows:
Question 6
4 / -1

A domain in ferromagnetic iron is in the form of a cube of side length 1μm. Estimate the number of iron atoms in the domain and the maximum possible dipole moment and magnetisation of the domain. The molecular mass of iron is 55 g/mole and its density is 7.9 g/cm³. Assume that each iron atom has a dipole moment of

A

B

C

D

Solution
Question 7
4 / -1

Which of the following inflorescence shows the occurrence of three types of flowers:

A
Capitulum

B
Cyathium

C
Hypanthodium

D
Umbel

Solution

Hypanthodium is a special type of inflorescence. Here, the receptacle is fleshy and forms hollow ball like structure with an apical opening. Three types of flowers develop on the inner surface of the receptacle. The female flowers are towards the base, male flowers are towards the orifice and short styled sterile female flowers are in between, For example: Ficus sp. The inflorescence is pollinated by a gall wasp.
Question 8
4 / -1

Variety of forms in the ecosystem due to diversity of niches, trophic levels and ecological processes is called

A
α-diversity

B
β-diversity

C
γ-diversity

D
Ecosystem diversity

Solution

Ecosystem diversity deals with the variations in ecosystems within a geographical location and their overall impact on human existence and the environment. Ecological diversity is a type of biodiversity. It is the variation in the ecosystems found in a region or the variation in ecosystems over the whole planet.
Question 9
4 / -1

One end of a brass rod 2m long and 1cm radius is maintained at 250^∘C. When a steady state is reached, the rate of heat flow across any cross-section is 0.5 cals s⁻¹. What is the temperature of the other end?

A
127.6^oC

B
187.2^oC

C
197.5^oC

D
210.7^oC

Solution
Question 10
4 / -1

Which of the following is not a condensation polymer?

A
Polyacrylonitrile

B
Nylon 6

C
Dacron

D
Bakelite

Solution

Polyacrylonitrile is a synthetic polymer with the linear formula (C₃H₃N)_n. Although it is thermoplastic it does not melt under normal conditions, since it degrades before melting at above 300 °C. Almost all Polyacrylonitrile resins are copolymers made from mixtures of monomers, with acrylonitrile as the main component. As it is a non condensation polymer.