NEET Test 149

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NEET Test 149

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Weekly Quiz Competition

Question 1
4 / -1

The diagram given below is a vapour pressure composition diagram for a binary solution of A and B. In the solution, A-B interactions are:

A
Smaller than A-A and B-B interactions

B
Similar to A-A and B-B interactions

C
Greater than A-A and B-B interactions

D
Unpredictable

Solution

The vapour pressure of the solutions is almost equal to the vapour pressure of the initial A-A and B-B interactions.

Hence, there is no deviation, neither positive nor negative.

Therefore, A-B intersections are similar to the A-A and B-B interactions.
Question 2
4 / -1

Standard enthalpies of formation of CO₂(g), CO(g), N₂O(g) and NO₂(g) in kJ/mol are -393, -110, 81 and 34, respectively. What is the value of ∆H (in kJ) in the following reaction?

2NO₂ (g) + 3CO (g) → N₂O (g) + 3CO₂ (g)

A
-777

B
-1460

C
1460

D
836

Solution

Genius Reaction is ,

N₂O₄(g) + 3CO(g) -----> N₂O(g) + 3CO₂(g)

we know,

heat of reaction ( ∆rH°) = ( sum of heat of formation of products ) - ( sum of heat of formation of reactants )

e.g., ∆rH° = [∆fH°(N₂O) + 3fH°(CO₂) ] - [∆fH°(N₂O₄) + 3fH°(CO) ]

Given, enthalpy of formation of CO, CO₂ , N₂O, and N₂O₄ are -110, -393 , 81 and 9.7 KJ/mol respectively .

now, ∆rH° = [81 + 3(-393)] - [9.7 + 3(-110)]

= -777.7 KJ
Question 3
4 / -1

The phase difference between two waves represented by where x is expressed in metres and t is expressed in seconds, is approximately

A
1.07 rad

B
2.07 rad

C
0.5 rad

D
1.5 rad

Solution
Question 4
4 / -1

The work function of a substance is 4.0eV. The longest wavelength of light that can cause photoelectron emission from this substance is approximately:

A
540nm

B
400nm

C
310nm

D
220nm

Solution

Given,

The work function of a substance,

= 4.0eV

The minimum energy of incident radiations, required to eject the electrons from the metallic surface is defined as the work function of that surface.
Question 5
4 / -1

Select the correct match from the following.

A
Silverfish - Osteichthyes

B
Jellyfish - Scyphozoa

C
Cuttlefish - Elasmobranch

D
Crayfish - Echinodermata

Solution

Lepisma saccharina, commonly known as a silverfish or fishmoth, is a small, wingless insect in the order Thysanura, class Insecta. Therefore, it is an incorrect match.

Jellyfish are the major non-polyp form of individuals of the phylum Cnidaria of class Scyphozoa. Therefore, it is the correct match.

Cuttlefish are marine animals of the order Sepiida. They belong to the class Cephalopoda. Therefore, it incorrect match.

Crayfish, also known as crawfish, freshwater lobsters belongs to class Malacostraca of phylum arthropoda. Therefore, it is an incorrect match.
Question 6
4 / -1

Directions For Questions

Consider the following statements regarding Wetlands sites.

1. In India Wetlands rules are notified under the provisions of the Environment (Protection) Act, 1986.

2. All wetlands, paddy fields, river channels are notified under the Wetlands rules.

3. Ramsar is an intergovernmental treaty work with local, national and international cooperation.

4. Coastal Zone Regulation have been excluded from notification under the Wetlands Rules.

5. Ramsar wetlands sites are registered in a Montreux record register.

...view full instructions

Select the correct answer using the code given below.

A
1,2,3 and 4 only

B
2,3,4 and 5 only

C
1,3,4 and 5 only

D
1 and 5 only

Solution

Statement 1 is correct- In India Wetlands rules (Conservation and Management) Rules, 2017 is under the provisions of the Environment (Protection) Act, 1986.

Statement 2 is incorrect- Wetlands size, biodiversity, location and ecosystem services values are included under the wetlands rules but River channels; Paddy fields; and certain categories of Human-made water bodies are not includes in these rules.

Statement 3 is correct-. Ramsar is an intergovernmental treaty work with local, national and international cooperation.

Statement 4 is correct- The protected area included under coastal zone regulation has been excluded from wetlands rules.

Statement 5 is correct- Ramsar wetlands sites are registered in a Montreux record register. In this register wetlands, changes in ecological character have occurred, are occurring, or are likely to occur as a result of technological developments, pollution or other human interference. Currently, two Indian lakes namely Loktak Lake and Keoladeo National Park are in Montreux Record.
Question 7
4 / -1

A particle of mass 0.1kg is held between two rigid supports by two springs of force constant 8 Nm⁻¹and 2Nm⁻¹. If the particle is displaced along the direction of length of the springs, its frequency of vibration is:

A

B

C

D

Solution
Question 8
4 / -1

Syngamy means:

A
The fusion of similar spores

B
The fusion of gametes

C
The fusion of dissimilar spores

D
Fusion of cytoplasm

Solution

Syngamy is the process of fusion of male and female gametes to form a diploid zygote. It involves the close association of gametes and results in the formation of a zygote.
Question 9
4 / -1

Two masses m₁ and m₂ are suspended together by a mass-less spring of spring constant K. When the masses are in equilibrium, m₁ is removed without disturbing the system. The angular frequency and amplitude of oscillation of m₂ are

A

B

C

D

Solution

Solution:
As it is given that masses are in equilibrium so initially there is no motionwhich means that there will be no angular velocity in the start when m₁ is removed equilibrium will be disturbed and an angular velocity is produced and it will revolve in a circle
We know the formula for angular frequency of an object
Question 10
4 / -1

Haemozoin is a toxic substance released upon which of the following events?

A
Rupture of liver cells

B
Rupture of cells of gut epithelium

C
Rupture of RBCs

D
Rupture of cells of salivary glands

Solution

The Plasmodium species during malarial formation, metabolize hemoglobin and other RBC proteins to create a toxic pigment called hemozoin. Haemozoin is a waste product formed when the parasite digests the blood. The parasite digests the hemoglobin of the blood and release high quantities of free heme. This heme released is a non-protein component of hemoglobin. The haemozoin is, therefore, a product of the erythrocyte lysis released from the food vacuole into circulation.