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NEET Mock Test - 8 - NEET MCQ


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30 Questions MCQ Test NEET Mock Test Series - Updated 2025 Pattern - NEET Mock Test - 8

NEET Mock Test - 8 for NEET 2025 is part of NEET Mock Test Series - Updated 2025 Pattern preparation. The NEET Mock Test - 8 questions and answers have been prepared according to the NEET exam syllabus.The NEET Mock Test - 8 MCQs are made for NEET 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for NEET Mock Test - 8 below.
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NEET Mock Test - 8 - Question 1
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Which energy state of triply ionised beryllium (Be+++) has the same electron orbital radius as that of the ground state of hydrogen? Given Z for beryllium = 4.

Detailed Solution for NEET Mock Test - 8 - Question 1
For an atom of atomic number Z, the radius of the nth orbit is given by

where K = is a constant.

For the ground state of hydrogen (Z = 1), n = 1 so that r1 = K

Let n be the energy state of Be+++ for which the orbital radius is r1.

Putting Z = 4 and rn = r1 = K is Eq.

(i) we get

or n2 = 4 or n = 2

NEET Mock Test - 8 - Question 2
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Two masses m1 = 6 kg and m2 = 4 kg are connected by means of a string which passes over a frictionless pulley as shown in the figure.

When the masses are released, what is the acceleration of the masses? (Take g = 10 ms-2)

Detailed Solution for NEET Mock Test - 8 - Question 2
The common acceleration of the masses is

Hence, the correct choice is (a).

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NEET Mock Test - 8 - Question 3
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Consider the following statements (A) and (B) and identify the correct answer.

A. A zener diode is connected in reverse bias when used as a voltage regulator.

B. The potential barrier of p-n junction lies between 0.2 V to 0.3 V.

Detailed Solution for NEET Mock Test - 8 - Question 3
Recall the concept of the voltage regulator.

(A) Zener diode operate under reverse bias in the breakdown region and is used as a voltage regulator.

(B) The potential barrier can be between (0.6 to 0.7 ) V.

NEET Mock Test - 8 - Question 4
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A proton of mass m and charge +e is moving in a circular orbit in a magnetic field with energy 1 MeV. What should be the energy of an α - particle (mass 4m and charge +2e) so that it revolves in a circular orbit of the same radius in the same magnetic field?
Detailed Solution for NEET Mock Test - 8 - Question 4

Here ‘r’ and ‘ B’ are constants

∴

∴

⇒ Kα = 1 MeV.

NEET Mock Test - 8 - Question 5
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The graph between magnetic susceptibility and absolute temperature for a paramagnetic substance is
Detailed Solution for NEET Mock Test - 8 - Question 5

NEET Mock Test - 8 - Question 6
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A Daniel cell is connected to the primary coil of a transformer. If the output voltage of the Daniel cell is 10 V, and the ratio of secondary to primary coil turns of transformer is 2, then the voltage in the secondary will be
Detailed Solution for NEET Mock Test - 8 - Question 6
Transformer does not work for DC.
NEET Mock Test - 8 - Question 7
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An AC generator’s coil has 2000 turns and is rotated with angular speed of 500 rad/s. If the area of the coil is 10 cm2 and the magnetic field is 0.2 T, then the peak voltage in the coil will be
Detailed Solution for NEET Mock Test - 8 - Question 7

Vmax = NBAω

= 2000 × 0.2 × 10 × 10–4 × 500

= 200 V

NEET Mock Test - 8 - Question 8
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The ratio of respective capacitive reactance when connected with a source of frequency 40 Hz and 60 Hz is
Detailed Solution for NEET Mock Test - 8 - Question 8

NEET Mock Test - 8 - Question 9
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The network shown in the figure is part of a complete circuit. If at a certain instant, the current i is 5 A and decreasing at a rate of 103 As−1 then potential difference between A and B (VB−VA ) is equal to 
Detailed Solution for NEET Mock Test - 8 - Question 9

VA−5+15+5=VB
⇒VB−VA=15 V

NEET Mock Test - 8 - Question 10
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Variation of a current with time is shown in the graph below. The rms value of the current between time t = 0 to t = 4 s is
Detailed Solution for NEET Mock Test - 8 - Question 10

= √3 A

NEET Mock Test - 8 - Question 11
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A new system of units is evolved in which the values of μ0 and ε0 are 2 and 8, respectively. The speed of light in this system will be
Detailed Solution for NEET Mock Test - 8 - Question 11
A new system of units is evolved in which the values of μ0 and ε0 are 2 and 8, respectively. The speed of light in this system will be

= 0.25

NEET Mock Test - 8 - Question 12
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From the following figure describing photoelectric effect, we may infer correctly that
Detailed Solution for NEET Mock Test - 8 - Question 12

Kinetic energy of the emitted electrons is given by

where is the work function.

Stopping potential V is given by:

So, we can say that it is a straight line whose slope gives the ratio of Plank's constant to the charge on the electron and intercept gives the work function (in eV).

The maximum KE of the photoelectron is

Hence, maximum KE varies linearly with frequency.

NEET Mock Test - 8 - Question 13
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The energy released in the fission of a single 23592U nucleus is 200 MeV. The fission rate of a 23592U filled reactor operating at a power level of 5 W is
Detailed Solution for NEET Mock Test - 8 - Question 13

Fission Rate =

= 1.56 1011 s-1

NEET Mock Test - 8 - Question 14
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A photon will have less energy if its
Detailed Solution for NEET Mock Test - 8 - Question 14

The energy of a photon is given by

E = hc / λ

Where, h = Planck's constant = 6.62 × 10−34 J s

c = speed of light = 3 × 108 m s−1,

λ = wavelength

Therefore, E ∝ 1 / λ

If a photon has longer wavelength, it will have less energy.

NEET Mock Test - 8 - Question 15
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Two solutions of a substance are mixed in the following manner: 480 mL of 1.5 M first solution + 520 mL of 1.2 M second solution. What is the molarity of the final mixture?
Detailed Solution for NEET Mock Test - 8 - Question 15

NEET Mock Test - 8 - Question 16
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What is the product in the following reaction?
Detailed Solution for NEET Mock Test - 8 - Question 16
Yes, (b), it is the correct answer.

NEET Mock Test - 8 - Question 17
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Common example of Antihistamines is
Detailed Solution for NEET Mock Test - 8 - Question 17
Common antihistamines are brompheniramine (Dimetapp) and terfenadine (seldane).
NEET Mock Test - 8 - Question 18
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Which of the following isomerism is shown by the product formed in the given reaction?
Detailed Solution for NEET Mock Test - 8 - Question 18

NEET Mock Test - 8 - Question 19
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Major product of below reaction is
Detailed Solution for NEET Mock Test - 8 - Question 19

NEET Mock Test - 8 - Question 20
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The volume of water that needs to be added to 10.0 mL of nitric acid (density: 1.40 g mL–1) containing 70 mass percent of acid to prepare 1.0 M solution would be
Detailed Solution for NEET Mock Test - 8 - Question 20
Mass of 10.0 mL of nitric acid, m = = (10.0 mL) (1.40 g mL–1) = 14.0 g

Mass of nitric acid in this solution – (14.0 g) (70/100) = 9.8 g

Amount of nitric acid = 9.8 g/63 g mol–1 = 0.1556 mol

Molarity of solution =

This solution is to be diluted to prepare 1.0 M solution.

Volume of the resultant solution =

Volume of water to be added = 155.6 mL – 10 mL = 145.6 mL

NEET Mock Test - 8 - Question 21
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The compounds C2H5OC2H5 and CH3OCH2CH2CH3 are
Detailed Solution for NEET Mock Test - 8 - Question 21
Metamerism: In this type of isomerism, structural formulae of the isomers differ due to the difference in the distribution of carbon atoms around a polyvalent atom or functional groups. For example

(i) C2H5 - O - C2H5 and

Diethyl ether

CH3 - O - CH2 - CH2 - CH3

Methyl n-propyl ether

(ii) C2H5 - NH - C2H5 and

Diethyl amine

CH3 - NH - CH2 - CH2 - CH3

Methyl n-propyl amine

NEET Mock Test - 8 - Question 22
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Direction: In the following questions, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the options given below each question.

Assertion : Beryllium hydride is a covalent hydride.

Reason : The electronegativity difference between Be and H is very high.
Detailed Solution for NEET Mock Test - 8 - Question 22
The electronegativity difference between Be (1.5) and H (2.1) is small.
NEET Mock Test - 8 - Question 23
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Which of the following statement is correct?
Detailed Solution for NEET Mock Test - 8 - Question 23
The structure Of H3PO3 is

since, it contains two −OH groups, it is dibasic. Also, it contains H atoms directly attached to P. Hence, it is reducing.

NEET Mock Test - 8 - Question 24
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Which of the following types of flower has an inferior ovary?
Detailed Solution for NEET Mock Test - 8 - Question 24
In epigynous flowers, the hypanthium is fused to the gynoecium, and the free parts of the sepals, petals, and stamens appear to be attached to the top of the gynoecium, as in the apple (Malus; Rosaceae); the ovary is inferior, and the petals, sepals, and stamen are superior. Ovary of an epigynous flower is inferior. Daffodil is an example of an epigynous condition.

NEET Mock Test - 8 - Question 25
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Which of the following bacteria are chemoautotrophs?

A. Nitrococcus

B. Pseudomonas

C. Thiobacillus

D. Nitrobacter
Detailed Solution for NEET Mock Test - 8 - Question 25
Chemotrophs are organisms that obtain energy by the oxidation of electron donors in their environments. These molecules can be organic (chemoorganotrophs) or inorganic (chemolithotrophs). The chemotroph designation is in contrast to phototrophs, which use solar energy. Chemotrophs can be either autotrophic or heterotrophic. Chemotrophs can be found on ocean floors where sunlight cannot reach or above ground, such as the case with iron bacteria. Some examples of chemoautotrophs include sulfur-oxidizing bacteria, nitrogen-fixing bacteria and iron-oxidizing bacteria. Nitrococcus and Nitrobacter are chemoautotrophs. They are nitrifying bacteria.
NEET Mock Test - 8 - Question 26
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Which of the following sentences about photorespiration is false?
Detailed Solution for NEET Mock Test - 8 - Question 26
This is the correct option as this statement about photorespiration is false. It is favoured by low CO2 concentration. Carboxylation is favoured by high CO2 concentration.
NEET Mock Test - 8 - Question 27
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Select the mis-match
Detailed Solution for NEET Mock Test - 8 - Question 27

1. Klinefelter’s syndrome is the genetic disorder caused due to the presence of an additional copy of X-chromosome

2. It results into a karyotype of 47 (with XXY).

3. Such individuals are sterile.

NEET Mock Test - 8 - Question 28
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Which of the following disorders is mostly due to genetic disorder resulting in progressive degeneration of the skeletal muscles?
Detailed Solution for NEET Mock Test - 8 - Question 28
Muscular dystrophy is a group of diseases that cause progressive weakness and loss of muscle mass. In muscular dystrophy, abnormal genes (mutations) interfere with the production of proteins needed to form healthy muscle. Medication, therapy, breathing aids or surgery may help maintain function, but life span is often shortened.
NEET Mock Test - 8 - Question 29
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______ are the type of WBCs which secrete heparin, histamine and serotonin.

Choose the option that fills the blanks correctly
Detailed Solution for NEET Mock Test - 8 - Question 29
Basophils mediate inflammation.
NEET Mock Test - 8 - Question 30
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Confirmatory test for typhoid is
Detailed Solution for NEET Mock Test - 8 - Question 30
Widal test is a confirmatory test for typhoid.
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