JEE Main Mock Test 12 - Online MCQ Exam

40 is subtracted from 60% of a number, the result is 50. Find the number?

1 Mark(s)

Your Answer:

150 150
140 140
130 130
110 110

Faraday's first law relates:

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Your Answer:

$m \propto I$ $m \propto I$
$m \propto Q$ $m \propto Q$
$m \propto t$ $m \propto t$
$m \propto V$ $m \propto V$

C takes 6 days to complete half of a work and D takes 5 days to complete 1/3rd of the same work. They take turns to complete the task. If C works for the first 4 days, in how many days will D complete the rest of the work without the help of C?

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Your Answer:

10 days 10 days
12 days 12 days
8 days 8 days
9 days 9 days

A line that intersects two lines in different points is known as:

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Your Answer:

angles angles
transversal lines transversal lines
vertex vertex
parallel lines parallel lines

The characteristic of sound by which we can distinguish between a shrill and a grave sound is known as:

1 Mark(s)

Your Answer:

quality quality
intensity intensity
loudness loudness
pitch pitch

A top can fill a cistern in 8 hours and another can empty it in 16 hours. If both the taps are opened simultaneously the time (in hours) to fill the tank is

1 Mark(s)

Your Answer:

8 8
10 10
16 16
24 24

When a circuit with very low resistance is formed, there can be occurred a:

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Your Answer:

potential difference potential difference
short circuit short circuit
flow of light flow of light
flow of heat flow of heat

Which of the following causes headache and dizziness and can even cause death if inhaled for a long time?

1 Mark(s)

Your Answer:

sulphur dioxide sulphur dioxide
carbon dioxide carbon dioxide
nitrogen dioxide nitrogen dioxide
carbon monoxide carbon monoxide

If $9x = 81$, find $x$

1 Mark(s)

Your Answer:

7 7
8 8
10 10
9 9

The length of a rectangular plot is 20 metres more than its breadth. If the cost of fencing the plot @ 26.50 per metre is Rs. 5300, what is the length of the plot in metres?

1 Mark(s)

Your Answer:

40 40
50 50
120 120
None of These None of These

Total distance travelled by a bob of the simple pendulum in one vibration is equal to________________?

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Your Answer:

Amplitude Amplitude
Square of the amplitude Square of the amplitude
2 x amplitude 2 x amplitude
4 x amplitude 4 x amplitude

Raney nickel is prepared from ______________________ by treating with caustic soda?

1 Mark(s)

Your Answer:

Ni-Cu alloy Ni-Cu alloy
Ni-Fe alloy Ni-Fe alloy
Ni-Al alloy Ni-Al alloy
Ni-Mg alloy Ni-Mg alloy

Elements having high I.P values are____________________?

1 Mark(s)

Your Answer:

Metals Metals
Non metals Non metals
Liquids Liquids
Solids Solids

Dielectric strength of air is approx:

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Your Answer:

$3 \times 10^6 V/m$ $3 \times 10^6 V/m$
$3 \times 10^8 V/m$ $3 \times 10^8 V/m$
$10^4 V/m$ $10^4 V/m$
$9.8 V/m$ $9.8 V/m$

How many 4-letter words with or without meaning, can be formed out of the letters of the word, ‘LOGARITHMS’, if repetition of letters is not allowed?

1 Mark(s)

Your Answer:

40 40
400 400
5040 5040
2520 2520

The area of a square of side 1 cm is

1 Mark(s)

Your Answer:

A) 1 cm² A) 1 cm²
B) 4 cm² B) 4 cm²
C) 9 cm² C) 9 cm²
D) 16 cm² D) 16 cm²

In the questions given below, there are two statements marked as Assertion (A) and Reason (R). Read the statements and choose the correct option.

1 Mark(s)

Your Answer:

A) Both (A) and (R) are true and R is the correct explanation of (A).
B) Both (A) and (R) true but (R) is not the correct explanation of (A).
C) (A) is true but (R) is false. C) (A) is true but (R) is false.
D) (A) is false but (R) is true. 1. Assertion (A): AB=6 cm, BC=8 cm and AC =14 cm can be the sides of a Δ. Reason (R) : AB+AC>BC. (A) is false but (R) is true. 2. Assertion (A) : A ΔABC with ∠A=70° and ∠B=120° can not be constructed. Reason (R) : For a Δ ABC, ∠ A+∠ B+∠ C= 180° (A) and (R) are true and R is the correct explanation of (A). 3. Assertion (A) : In the following figure ∠PRS is called an exterior angle. Reason (R) : An exterior angle is formed if any side of a Δ is extended. (A) and (R) are true and R is the correct explanation of (A). A Tale of Three Intersecting Lines Class 7 Fill in the blanks 1. In the given figure, (i) ∠B = ___ (ii) ∠C = ___ Answer: (i) ∠B = 55° (ii) ∠C = 55° 2. In the given figure, (i) ∠PQR = ___ (ii) ∠PRS = ___ (iii) ∠PRQ = ___ Answer: (i) ∠PQR = 80° (ii) ∠PRS = 130° (iii) ∠PRQ = 50° 3. The length of the third side of a triangle whose two sides are 5 cm and 6 cm must be less than (i) ___ and greater than (ii) ___ Answer: (i) 11 cm (ii) 1 cm 4. A triangle can have atmost _____ obtuse angle. Answer: One 5. Altitude is also called _____ of a triangle. Answer: height 6. A triangle with one angle equal to 90° is called a _____ triangle. Answer: height angled 7. In an isosceles triangle, _____ sides are equal. Answer: 2 8. The sum of the interior angles of a triangle is always _____ degrees. Answer: 180 A Tale of Three Intersecting Lines Class 7 True or False 1. An equilateral triangle can be a right triangle. Answer: False 2. The sum of the two sides of a triangle is greater than or equal to the third side. Answer: False 3. A triangle can have all three angles with measures less than 60°. Answer: False 4. The altitude of a triangle always lies outside the triangle. Answer: False 5. A triangle can have two obtuse and one acute angle. Answer: False 6. Sum of the measures of three angles of a triangle is greater than 180°. Answer: False 7. It is possible to have a triangle in which each angle is less than 60°. Answer: False 8. It is possible to have a right angled equilateral triangle. Answer: False 9. The difference between the length of any two sides of a triangle is smaller than the length of third side. Answer: True 10. In the following figure, the value of x is equal to 12 cm. Answer: False A Tale of Three Intersecting Lines Class 7 Match the Following

Identify the products (X) and (Y) in the given reaction

1 Mark(s)

Your Answer:

A) X = Acetophenone, Y = m-N itroacetophone
B) X = Toluene, Y = m-Nitroacetotoluene B) X = Toluene, Y = m-Nitroacetotoluene
C) X = Acetophenone, Y = o- and p-Dinitroacetophenone
D) X = Benzaldehyde, Y = m-Nitrobenzaldehyde

Interference is observed in which wave type?

1 Mark(s)

Your Answer:

Only Transverse Only Transverse
Only Longitudinal Only Longitudinal
Both Transverse and Longitudinal Both Transverse and Longitudinal
Only EM waves Only EM waves

Find the size of the largest square slabs which can be paved on the floor of a room 5 meters 44 cm long and 3 meters 74 cm broad?

1 Mark(s)

Your Answer:

56 56
42 42
38 38
34 34

If sin -1 x – cos -1 x = $\frac{\pi}{6}$, then x =

1 Mark(s)

Your Answer:

A) $\frac{1}{2}$ A) $\frac{1}{2}$
B) $\frac{\sqrt{3}}{2}$ B) $\frac{\sqrt{3}}{2}$
C) $-\frac{1}{2}$ C) $-\frac{1}{2}$
D) $-\frac{\sqrt{3}}{2}$ (\frac{\sqrt{3}}{2}\)

An object undergoes free fall. Its acceleration is:

1 Mark(s)

Your Answer:

Zero Zero
Variable Variable
Constant ($g$) Constant ($g$)
Increasing Increasing

Six points are marked on a straight line and five points are marked on another line which is parallel to the first line. How many straight lines, including the first two, can be formed with these points?

1 Mark(s)

Your Answer:

29 29
32 32
55 55
30 30

7 2/5 of 110 / ? = 844

1 Mark(s)

Your Answer:

22 22
24 24
30 30
28 28

Nuclei which do not emit radiations naturally are called:

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Your Answer:

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

A wave transports:

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Your Answer:

Matter Matter
Energy Energy
Mass Mass
Nothing Nothing

Two cars A and B are moving with velocities $v_A$ and $v_B$ in the same direction. The relative velocity of A with respect to B is:

1 Mark(s)

Your Answer:

$v_A + v_B$ $v_A + v_B$
$v_A - v_B$ $v_A - v_B$
$v_B - v_A$ $v_B - v_A$
$\sqrt{v_A^2 + v_B^2}$ $\sqrt{v_A^2 + v_B^2}$

The mechanical waves in which particles of the medium vibrate about their mean position along the direction of propagation of the waves are called:

1 Mark(s)

Your Answer:

transverse waves transverse waves
longitudinal waves longitudinal waves
mechanical waves mechanical waves
electromagnetic waves electromagnetic waves

A ray of light falls on a glass plate of refractive index $\mu = \sqrt{3}$ at an angle of $60^\circ$. The angle between the reflected and refracted rays is:

1 Mark(s)

Your Answer:

$30^\circ$ $30^\circ$
$60^\circ$ $60^\circ$
$120^\circ$ $120^\circ$
$90^\circ$ $90^\circ$

Reaction time is the time interval between:

1 Mark(s)

Your Answer:

Observing and Acting Observing and Acting
Applying brakes and Stopping Applying brakes and Stopping
Starting and Stopping Starting and Stopping
None of these None of these

How much ethene is required for the ripening of 1 kg of tomatoes?

1 Mark(s)

Your Answer:

1 mg 1 mg
100 mg 100 mg
10 mg 10 mg
0.1 mg 0.1 mg

What is \$72\%$ of \$150$?

1 Mark(s)

Your Answer:

102 102
108 108
114 114
120 120

Compounds that have the same molecular formula but a different arrangement of atoms in their molecules are called:

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Your Answer:

isotopes isotopes
isomers isomers
hydrocarbons hydrocarbons
organic compounds organic compounds

Which of the following gases is used for welding?

1 Mark(s)

Your Answer:

Methane Methane
Ethane Ethane
Acetylene Acetylene
Ethene Ethene

A tank can be filled by a pipe in 20 min. and by another pipe in 60 min. Both the pipes are kept open for 10 min. and then the first pipe is shut off. After this, the tank will be completely filled in__________?

1 Mark(s)

Your Answer:

10 min 10 min
20 min 20 min
30 min 30 min
40 min 40 min

Hoffmann mustard oil reaction uses:

1 Mark(s)

Your Answer:

$\ce{CHCl3/KOH}$ $\ce{CHCl3/KOH}$
$\ce{C6H5SO2Cl}$ $\ce{C6H5SO2Cl}$
$\ce{CS2/HgCl2}$ $\ce{CS2/HgCl2}$
$\ce{Br2/KOH}$ $\ce{Br2/KOH}$

The lens which diverges light from a single point is:

1 Mark(s)

Your Answer:

concave lens concave lens
convex lens convex lens
biconvex lens biconvex lens
all of above all of above

Water flows a tank 200 x 150m through a rectangular pipe 1.5 x 1.25m at the rate at 20kmph. In what time will be water rises by 2 meters?

1 Mark(s)

Your Answer:

76 min 76 min
80min 80min
90min 90min
96min 96min

Electromagnetic waves are produced by:

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Your Answer:

Static charges Static charges
Moving charges (const v) Moving charges (const v)
Accelerated charges Accelerated charges
Magnets Magnets

The number of significant figures in $0.007 \, m^2$ is:

1 Mark(s)

Your Answer:

1 1
2 2
3 3
4 4

Digits other than zero are always:

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Your Answer:

estimated figures estimated figures
crossed figures crossed figures
non-significant figures non-significant figures
significant figures significant figures

The difference between a discount of 40% on Rs. 500 and two successive discount of 36% and 4% on the same amount is:________?

1 Mark(s)

Your Answer:

0 0
Rs. 2 Rs. 2
Rs. 1.93 Rs. 1.93
Rs. 7.20 Rs. 7.20

The slope of velocity-time graph gives_______?

1 Mark(s)

Your Answer:

Speed Speed
Velocity Velocity
Acceleration Acceleration
All of these All of these

A, B and C together earn Rs.150 per day while A and C together earn Rs.94 and B and C together earn Rs.76. The daily earning of C is:__________?

1 Mark(s)

Your Answer:

10 Rs, 10 Rs,
15 Rs, 15 Rs,
20 Rs. 20 Rs.
25 Rs. 25 Rs.

Standard state for elements:

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Your Answer:

Zero Zero
Positive Positive
Negative Negative
1 kcal/mol 1 kcal/mol

Which of the following angles is the measure of an acute angle?

1 Mark(s)

Your Answer:

A) 30° A) 30°
B) 90° B) 90°
C) 120° C) 120°
D) 240° D) 240°

How much time is required to deposit 1 × 10 -3 cm thick layer of silver (density of 1.05 g cm -3 ) on a surface of area 100 cm² by passing a current of 5 A through AgNO 3 solution?

1 Mark(s)

Your Answer:

A) 125 s A) 125 s
B) 115 s B) 115 s
C) 18.7 s C) 18.7 s
D) 27.25 s D) 27.25 s

If a, b and c are integers, then according to associative law of multiplication the ( a x b ) x c must be equal to:

1 Mark(s)

Your Answer:

a x ( b + c ) a x ( b + c )
( a − b ) x c ( a − b ) x c
(a + b ) + c (a + b ) + c
a x b + a x c a x b + a x c

Considering the inequality, -15 is:

1 Mark(s)

Your Answer:

> 20 > 20
< 8 < 8
> 2 > 2
> 15 > 15

A man can swim in still water at 4.5 km/h, but takes twice as long to swim upstream than downstream. The speed of the stream is_________?

1 Mark(s)

Your Answer:

3 3
7.5 7.5
2.25 2.25
1.5 1.5

One complete round trip of a vibrating body about its mean position is:

1 Mark(s)

Your Answer:

frequency frequency
time period time period
amplitude amplitude
vibration vibration

Raindrops are spherical due to:

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Your Answer:

Viscosity Viscosity
Surface Tension Surface Tension
Gravity Gravity
Air resistance Air resistance

If all values in a data set are equal, then

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Your Answer:

A) Mean > Median A) Mean > Median
B) Mean B) Mean
C) Mean = Median C) Mean = Median
D) Cannot be compared D) Cannot be compared

Term hardware is referred to:

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Your Answer:

software software
data data
machinery machinery
procedure procedure

The cost of fencing a rectangular field 24 m long and 18 m wide at ₹ 2.25 per metre is

1 Mark(s)

Your Answer:

A) ₹ 243 A) ₹ 243
B) ₹ 234 B) ₹ 234
C) ₹ 189 C) ₹ 189
D) ₹ 198 D) ₹ 198

What type of oxide would E&a-aluminium form?

1 Mark(s)

Your Answer:

A) EO 3 A) EO 3
B) E 3 O 2 B) E 3 O 2
C) E 2 O 3 C) E 2 O 3
D) EO D) EO

By solving the inequality 5a > -20, the answer will be:

1 Mark(s)

Your Answer:

a > 5 a > 5
a > -4 a > -4
a > -6 a > -6
a > -7 a > -7

Which among the following is (are) double displacement reaction(s)? (t) Pb + CuCl → PbCl 2 + Cu (ii) Na 2 SO 4 + BaCl 2 → BaSO 4 + 2NaCl (iii) C + O 2 → CO 2 (iv) CH 4 + 2O 2 → CO 2 + 2H 2 O

1 Mark(s)

Your Answer:

A) (i) and (iv) A) (i) and (iv)
B) (ii) only B) (ii) only
C) (i) and (ii) C) (i) and (ii)
D) (iii) and (iv) D) (iii) and (iv)

The resonant circuits that tune radios to particular frequencies are called:

1 Mark(s)

Your Answer:

plate circuits plate circuits
radio circuits radio circuits
filter circuits filter circuits
fiber circuits fiber circuits

Find the area of a rhombus whose side is 25 cm and one of the diagonals is 30 cm?

1 Mark(s)

Your Answer:

225 sq.m 225 sq.m
360 sq.m 360 sq.m
600 sq.m 600 sq.m
480 sq.m 480 sq.m

A plane with ten edges as its sides is called:

1 Mark(s)

Your Answer:

octagon octagon
decagon decagon
pentagon pentagon
hexagon hexagon

Vitamin D activates enzymes:

1 Mark(s)

Your Answer:

less than 100 less than 100
more than 100 more than 100
50 50
25 25

The equivalent resistance in a parallel resistance circuit when resistances are 2 &Omega, 3 Ω and 6 &Omega, and V = 6 V is:

1 Mark(s)

Your Answer:

2 Ω 2 Ω
3 Ω 3 Ω
1 Ω 1 Ω
4 Ω 4 Ω

A power station generates 600 MW of electrical power which is fed to a transmission line. If the input voltage is 300 Kv, then what current would flow in the transmission line?

1 Mark(s)

Your Answer:

5 × 103 A 5 × 103 A
10 × 103 A 10 × 103 A
2 × 103 A 2 × 103 A
7 × 103 A 7 × 103 A

Stability of nucleus depends on:

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Your Answer:

Just atomic number Just atomic number
N:P ratio, even/odd nucleons N:P ratio, even/odd nucleons
Just mass Just mass
Just size Just size

The perimeter of a rectangle with length \$22$ cm and width \$9$ cm is:

1 Mark(s)

Your Answer:

58 cm 58 cm
60 cm 60 cm
62 cm 62 cm
64 cm 64 cm

Strength of $\ce{H2O2}$ is expressed in:

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Your Answer:

Volume strength Volume strength
Molarity only Molarity only
Normality only Normality only
Percentage only Percentage only

The standard quantity for measuring is called:

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Your Answer:

base quantity base quantity
physical quantity physical quantity
derived quantity derived quantity
unit unit

Assertion (A) Sharper the tip, thinner will be the dot. Reason (R) A point determines a location.

1 Mark(s)

Your Answer:

A) Both A and R are true and R is the correct explanation of A.
B) Both A and R are true but R is not the correct explanation of A.
C) A is true but R is false. C) A is true but R is false.
D) A is false but R is true. D) A is false but R is true.

The value of mean proportional to 20, 45 should be:

1 Mark(s)

Your Answer:

±30 ±30
−30 −30
−900 −900
±900 ±900

Energy required to form transition state is called _________________?

1 Mark(s)

Your Answer:

Ea Ea
P.E P.E
V V
K.E K.E

If $x + 27 = 80$, find $x$

1 Mark(s)

Your Answer:

51 51
52 52
54 54
53 53

The compound interest on a certain sum of money for 2 years at 10 % per annum is Rs.420. The simple interest on the same sum at the same rate and for the same time will be_______?

1 Mark(s)

Your Answer:

Rs.350 Rs.350
Rs.375 Rs.375
Rs. 380 Rs. 380
Rs. 400 Rs. 400

Percentage of carbon dioxide in the air is:

1 Mark(s)

Your Answer:

0.78 0.78
0.21 0.21
0.0093 0.0093
0.0004 0.0004

The NOT operation can be represented as:

1 Mark(s)

Your Answer:

X = A + B X = A + B
X X
X = A - B X = A - B
X = A . B X = A . B

The value of the determinant $\left|\begin{array}{ccc} x & x+y & x+2 y \\ x+2 y & x & x+y \\ x+y & x+2 y & x \end{array}\right|$ is

1 Mark(s)

Your Answer:

A) 9x 2 (x + y) A) 9x 2 (x + y)
B) 9y 2 (x + y) B) 9y 2 (x + y)
C) 3y 2 (x + y) C) 3y 2 (x + y)
D) 7x 2 (x + y) (x + y) D) 7x 2 (x + y) (x + y)

AB, CD and EF are chords of a circle with centre O. Also OL ⊥ AB, OM ⊥ CD and ON ⊥ EF. If OL = OM = ON, then which of the following is true?

1 Mark(s)

Your Answer:

A) AB, BC and CD are unequal A) AB, BC and CD are unequal
B) AB, BC and CD may be or may not be equal
C) AB = BC = CD C) AB = BC = CD
D) None of these D) None of these

Orlon is:

1 Mark(s)

Your Answer:

Polyester Polyester
Polyacrylonitrile Polyacrylonitrile
Polyamide Polyamide
Polyolefin Polyolefin

A shopkeeper sells two articles at Rs.1000 each, making a profit of 20% on the first article and a loss of 20% on the second article. Find the net profit or loss that he makes?

1 Mark(s)

Your Answer:

neither profit nor loss neither profit nor loss
3% 3%
5% 5%
4% 4%

(a) 0 (b) -1 (c) 2 (d) 3

1 Mark(s)

Your Answer:

A) 0 A) 0
B) -1 B) -1
C) 2 C) 2
D) 3 D) 3

Evaluating Your Answers

JEE Main Mock Test 12 : Question 1 of 80