JEE Main Mock Test 15 - Online MCQ Exam

Beta particles are stream of high energy:

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Your Answer:

electrons electrons
protons protons
photons photons
positrons positrons

A mixture contains alcohol and water in ratio \$7:5$. If \$9$ liters of water is added, the ratio becomes \$7:8$. Find the original quantity of alcohol.

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Your Answer:

18 liters 18 liters
21 liters 21 liters
24 liters 24 liters
27 liters 27 liters

Most of the dust particles and water vapors are present in:

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Your Answer:

troposphere troposphere
stratosphere stratosphere
mesosphere mesosphere
thermosphere thermosphere

What is the force of attraction between any two bodies by virtue of their masses is called?

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Your Answer:

Electromagnetic Force Electromagnetic Force
Gravitational Force Gravitational Force
Centripetal Force Centripetal Force
Nuclear Force Nuclear Force

The 'Standard Model' of particle physics does NOT currently include:

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Your Answer:

Gravity Gravity
Electromagnetism Electromagnetism
Strong Force Strong Force
Weak Force Weak Force

A short circuit occurs when a circuit is formed with:

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Your Answer:

high resistance high resistance
high voltage high voltage
low voltage low voltage
low resistance low resistance

A person covers a distance of \$120$ km in \$3$ hours partly by car at \$50$ km/h and partly by bike at $30$ km/h. Find the distance covered by car.

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Your Answer:

60 km 60 km
65 km 65 km
70 km 70 km
75 km 75 km

For a material with Poisson's ratio $\sigma = 0.5$, the Bulk Modulus $K$ is related to Young's modulus $Y$ by:

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Your Answer:

$K = Y$ $K = Y$
$K = Y/3$ $K = Y/3$
$K = 0$ $K = 0$
$K = \infty$ $K = \infty$

Which state of matter has the lowest density ?

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Your Answer:

Gas Gas
Liquid Liquid
Solid Solid
Plasma Plasma

White Phosphorous is represented by which symbol?

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Your Answer:

P1 P1
P2 P2
P3 P3
P4 Answer P4 Answer

Where would you locate the element with electronic configuration 2, 8 in the Modern Periodic Table?

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Your Answer:

A) Group 8 A) Group 8
B) Group 18 B) Group 18
C) Group 10 C) Group 10
D) Group 16 D) Group 16

Maximum permissible concentration of total hardness in drinking water is:?

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Your Answer:

500 500
200 200
100 100
50 Answer 50 Answer

The elements whose atomic number is greater than 82 are naturally:

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Your Answer:

unstable nuclei unstable nuclei
stable nuclei stable nuclei
positive nuclei positive nuclei
negative nuclei negative nuclei

Which is most reactive towards electrophilic substitution?

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Your Answer:

Nitrobenzene Nitrobenzene
Phenol Phenol
Benzene Benzene
Benzoic acid Benzoic acid

Viscosity of a liquid________by increasing temperature?

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Your Answer:

Remains same Remains same
Increases Increases
Decreases Decreases
None None

Ammonia may be prepared by heating ammonium chloride with_______________?

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Your Answer:

Water Water
NaCl NaCl
Aqueous sodium hydroxide Aqueous sodium hydroxide
H2SO4 H2SO4

Range of $f(x)=\sqrt{(1-\cos x) \sqrt{(1-\cos x) \sqrt{(1-\cos x) \ldots \ldots \infty}}}$

1 Mark(s)

Your Answer:

A) [0, 1] A) [0, 1]
B) (0, 1) B) (0, 1)
C) [0, 2] C) [0, 2]
D) (0, 2) If you have any query regarding CBSE Class 12 Maths Relations and Functions MCQs Pdf, drop a comment below and we will get back to you at the earliest. -->

Which of the following is a neutral particle ?

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Your Answer:

Alpha particle Alpha particle
Neutron Neutron
Electron Electron
Proton Proton
All of these All of these

If a body does not change its position concerning its surroundings, it is said to be at:

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Your Answer:

rest rest
motion motion
distance distance
position position

The circumference of a circle with radius 7 cm is

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Your Answer:

A) 88 cm A) 88 cm
B) 44 cm B) 44 cm
C) 22 cm C) 22 cm
D) None of the above D) None of the above

The rate of change of linear momentum of a body is directly proportional to:

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Your Answer:

Velocity Velocity
External Force External Force
Acceleration Acceleration
Mass Mass

The difference in sound levels between two sounds with intensity ratio 1000 is:

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Your Answer:

30 dB 30 dB
3 dB 3 dB
300 dB 300 dB
60 dB 60 dB

What is the chemical name of Hypo?

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Your Answer:

Sodium thiosulfate (Na₂S₂O₃·5H₂O)
Zinc Oxide (ZnO) Zinc Oxide (ZnO)
Calcium hypochlorite Ca(ClO)₂ Calcium hypochlorite Ca(ClO)₂
Ethyl alcohol (C 2 H 5 OH) Answer Ethyl alcohol (C 2 H 5 OH) Answer

The field lines always emerge from:

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Your Answer:

negative charge negative charge
positive charge positive charge
the central point of both charges the central point of both charges
all of above all of above

Identify among the following which has Lowest energy of electron in 1st shell.

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Your Answer:

H H
He+¹ He+¹
Li+² Li+²
Be+³ Be+³

Two AP’s have the same common difference. The difference between their millionth terms is 111 222 333. What is the difference between their 100th terms?

1 Mark(s)

Your Answer:

A) 111 222 333 A) 111 222 333
B) 333 222 111 B) 333 222 111
C) 222 333 111 C) 222 333 111
D) 333 111 222. D) 333 111 222.

Using the digits 5,2, and 9, how should they be arranged to make the largest possible product from a multiplication of the form ?

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Your Answer:

A) 95 × 2 A) 95 × 2
B) 92 × 5 B) 92 × 5
C) 52 × 9 C) 52 × 9
D) 29 × 5 D) 29 × 5

The human body can synthesize only:

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Your Answer:

12 amino acids 12 amino acids
10 amino acids 10 amino acids
15 amino acids 15 amino acids
5 amino acids 5 amino acids

Almost 95% of compounds are of carbon because they can form:

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Your Answer:

single bonds single bonds
double bonds double bonds
triple bonds triple bonds
multiple bonds multiple bonds

Breaking stress depends on:

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Your Answer:

Length of wire Length of wire
Radius of wire Radius of wire
Nature of material Nature of material
Shape of cross-section Shape of cross-section

The quantity of petrol can be increased by ___________?

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Your Answer:

Reforming Reforming
Induction fueling Induction fueling
Cracking Cracking
Refining Refining

In terms of velocity, the symbol vf is used for:

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Your Answer:

final velocity final velocity
initial velocity initial velocity
negative velocity negative velocity
total velocity total velocity

The distance between two consecutive crests or troughs is called:

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Your Answer:

Amplitude Amplitude
Frequency Frequency
Wavelength Wavelength
Wave number Wave number

A fuse is always connected with live wire in:

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Your Answer:

parallel parallel
series series
combination combination
alternative circuit alternative circuit

The cost of 10 kg of apples is equal to the cost of 24 kg of rice. The cost of 6 kg of flour equals the cost of 2 kg of rice. The cost of each kg of flour is Rs.20.50. Find the total cost of 4 kg of apples, 3 kg of rice and 5 kg of flour?

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Your Answer:

Rs.849.40 Rs.849.40
Rs.877.40 Rs.877.40
Rs.901.60 Rs.901.60
Rs.815.20 Rs.815.20
None of these None of these

The average mark of the students of a class in a particular exam is 80. If 5 students whose average mark in that exam is 40 are excluded, the average mark of the remaining will be 90. Find the number of students who wrote the exam.

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Your Answer:

20 20
15 15
25 25
35 35

A substance that donates a pair of electrons to form a coordinate covalent bond is called:

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Your Answer:

Lewis acid Lewis acid
Lewis base Lewis base
Bronsted-Lowry acid Bronsted-Lowry acid
Bronsted-Lowry base Bronsted-Lowry base

What is the effect of the base on the skin?

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Your Answer:

no effect no effect
causes skin cancer causes skin cancer
corrosive corrosive
causes harm to skin tissue causes harm to skin tissue

If for the non-singular matrix A, A 2 = I, then find A -1 .

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Your Answer:

A) A A) A
B) I B) I
C) O C) O
D) None of these D) None of these

15% of 195 + 14% of 205 = _______?

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Your Answer:

52 52
62 62
58 58
78 78

Today is khadija’s birthday. After one year, she will become two times as she was ten years ago. current age of Khadija?

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Your Answer:

19 19
20 20
21 21
22 22

If the medium between two charges is air, then the value of constant k in SI units will be:

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Your Answer:

5 × 109 Nm²C-2 5 × 109 Nm²C-2
7 × 109 Nm²C-2 7 × 109 Nm²C-2
8 × 109 Nm²C-2 8 × 109 Nm²C-2
9 × 109 Nm²C-2 9 × 109 Nm²C-2

The fifth step of the Solvay process is:

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Your Answer:

preparation of ammonical brine preparation of ammonical brine
carbonation carbonation
preparation of carbon dioxide and slaked lime
recovery of ammonia recovery of ammonia

The addition of HCN to carbonyl compounds is an example of

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Your Answer:

A) nucleophilic addition A) nucleophilic addition
B) electrophilic addition B) electrophilic addition
C) free radical addition C) free radical addition
D) electromeric addition D) electromeric addition

A vector which has magnitude one is called _________?

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Your Answer:

A resultant vector A resultant vector
A unit vector A unit vector
A null vector A null vector
A position vector A position vector

A garrison has sufficient food for 500 people to survive for 6 days. At the end of 2 days 100 men desert. How long the provisions are sufficient for now?

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Your Answer:

5 5
6 6
4 4
10 10

When a current passes through a conductor, it produces a magnetic field around it. This is discovered by:

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Your Answer:

Faraday Faraday
Ampere Ampere
Fleming Fleming
Johns Burge Johns Burge

Which of the following represents a chemical change?

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Your Answer:

A) Rusting of iron foil A) Rusting of iron foil
B) Melting of glacier B) Melting of glacier
C) Crushing a peace of chalk into powder
D) Folding sheets of papers to create new objects.

Atomic mass of an atom is present in the __________?

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Your Answer:

Shell Shell
Orbit Orbit
Nucleus Nucleus
Orbital Orbital

Which of the following elements does not lose an electron easily?

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Your Answer:

A) Na A) Na
B) F B) F
C) Mg C) Mg
D) Al D) Al

Which of the following expressions will always result in odd parity?

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Your Answer:

A) 2n-1 A) 2n-1
B) 2n B) 2n
C) 4n C) 4n
D) 6n + 10 D) 6n + 10

Which layer of atmosphere is first exposed to sunlight?

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Your Answer:

troposphere troposphere
stratosphere stratosphere
mesosphere mesosphere
thermosphere thermosphere

Solubility of KCIO3 gives__________________?

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Your Answer:

continuous and falling solubility curve continuous and falling solubility curve
discontinuous and falling solubility curve
continuous and rising solubility curve continuous and rising solubility curve
discontinuous and rising solubility curve

When we walk or run, to push the ground backward we need:

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Your Answer:

inertia inertia
position position
friction friction
velocity velocity

The equation sin -1 x – cos -1 x = cos -1 ($\frac{\sqrt{3}}{2}$) has

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Your Answer:

A) unique solution A) unique solution
B) no solution B) no solution
C) infinitely many solution C) infinitely many solution
D) none of these D) none of these

The irritation caused by red ants bite is due to____________________?

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Your Answer:

Lactic acid Lactic acid
Formic acid Formic acid
Uric acid Uric acid
Acetic acid Acetic acid

The co-ordinates of point Q are:

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Your Answer:

A) (3, 3.5) A) (3, 3.5)
B) (3.5, 3) B) (3.5, 3)
C) (- 3, 3.5) C) (- 3, 3.5)
D) (-3.-3.5) (-3.-3.5) D) (-3.-3.5) (-3.-3.5)

What is the pH of onion?

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Your Answer:

5.5 - 7.0 5.5 - 7.0
6.5 - 7.0 6.5 - 7.0
6.0 - 7.5 6.0 - 7.5
6.5 - 7.5 6.5 - 7.5

The organic acid that does not has COOH group is___________________?

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Your Answer:

phthalic acid phthalic acid
carbolic acid carbolic acid
Maleic acid Maleic acid
Succinic acid Succinic acid

Match the Column I with Column II.

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Your Answer:

A) 35 :49 (i) 7 6 A) 35 :49 (i) 7 6
B) 63 :54 (ii) 8 7 B) 63 :54 (ii) 8 7
C) 64: 40 (iii) 5 7 C) 64: 40 (iii) 5 7
D) 48 :42 (iv) 8 5 (iii) 5 7 D) 48 :42 (iv) 8 5 (iii) 5 7

In a race, a car travelled at a speed of 150 kmph. If it had travelled at 180 kmph, it would have completed the race before 3 minutes. Find the length of the track.

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Your Answer:

50 km 50 km
45 km 45 km
40 km 40 km
30 km 30 km

What is the molecular formula for Nitric acid ________ ?

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Your Answer:

HNO2 HNO2
HNO3 HNO3
HN2O2 HN2O2
H2NO4 H2NO4

In solids, the molecules are held together by:

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Your Answer:

strong force of attraction strong force of attraction
weak force of attraction weak force of attraction
zero force of attraction zero force of attraction
none of above none of above

The energy associated with each degree of freedom per molecule is:

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Your Answer:

$k_B T$ $k_B T$
$\frac{1}{2} k_B T$ $\frac{1}{2} k_B T$
$\frac{3}{2} k_B T$ $\frac{3}{2} k_B T$
$RT$ $RT$

Five years ago the average of the ages of A and B was 40 years and now the average of the ages of B and C is 48 years. What will be the age of the B ten years hence?

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Your Answer:

55 years 55 years
56 years 56 years
58 years 58 years
Data inadequate Data inadequate

Distance between a Node and the nearest Antinode is:

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Your Answer:

$\lambda/2$ $\lambda/2$
$\lambda/4$ $\lambda/4$
$\lambda$ $\lambda$
$3\lambda/4$ $3\lambda/4$

In wave motion:

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Your Answer:

A) Particles of the medium travel from one place to another
B) Particles of the medium vibrate about their mean position.
C) Particles of the medium do not vibrate
D) All of the above. D) All of the above.

What is \$55\%$ of \$100$?

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Your Answer:

55 55
50 50
60 60
65 65

The OR operation can be represented as:

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Your Answer:

X = A + B X = A + B
X = A x B X = A x B
X = A - B X = A - B
X = A ⁄ B X = A ⁄ B

Maltose is found in:

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Your Answer:

fruits fruits
vegetables vegetables
cereals cereals
beans beans

The final verification of a physical theory is done by:

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Your Answer:

Mathematical derivation Mathematical derivation
Logical debate Logical debate
Experiment and Observation Experiment and Observation
Public opinion Public opinion

The positive and negative terminals of direct current have:

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Your Answer:

no polarity no polarity
fixed polarity fixed polarity
variable polarity variable polarity
always negative polarity always negative polarity

Actinides are the elements with atomic number from:

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Your Answer:

97 to 104 97 to 104
101 to 115 101 to 115
89 to 103 89 to 103
36 to 43 36 to 43

The range of sin -1 x + cos -1 x + tan -1 x is

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Your Answer:

A) [0, π] A) [0, π]
B) $\left[\frac{\pi}{4}, \frac{3 \pi}{4}\right]$
C) (0, π) C) (0, π)
D) $\left[0, \frac{\pi}{2}\right]$ (\left[\frac{\pi}{4}, \frac{3 \pi}{4}\right]\)

Evaluating Your Answers

JEE Main Mock Test 15 : Question 1 of 74