JEE Main Mock Test 16 - Online MCQ Exam

The purpose of Smelting an ore is to________?

1 Mark(s)

Your Answer:

Reduce it Reduce it
Oxidize it Oxidize it
Obtain an alloy Obtain an alloy
Separate volatile impurities Separate volatile impurities

The value of 52 × 1001 is

1 Mark(s)

Your Answer:

A) 31408 A) 31408
B) 54386 B) 54386
C) 51041 C) 51041
D) 52052 D) 52052

Find the HCF of \$210$ and \$315$

1 Mark(s)

Your Answer:

35 35
70 70
210 210
105 105

Find the C.I. on a sum of Rs.1600 for 9 months at 20% per annum, interest being compounded quarterly?

1 Mark(s)

Your Answer:

Rs.17684 Rs.17684
Rs.1684 Rs.1684
Rs.2522 Rs.2522
Rs.3408 Rs.3408

If the pH value is greater than 7, then the solution is:

1 Mark(s)

Your Answer:

acidic acidic
basic basic
neutral neutral
salty salty

To move around the Earth, a satellite requires:

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Your Answer:

centrifugal force centrifugal force
centripetal force centripetal force
dynamic force dynamic force
translatory force translatory force

Enthalpy change can be_________________?

1 Mark(s)

Your Answer:

calculated by Hess law calculated by Hess law
can be measured by calorimeter can be measured by calorimeter
both A and B both A and B
none none

The solution is basic when pH is:

1 Mark(s)

Your Answer:

greater than 6 greater than 6
greater than 7 greater than 7
less than 7 less than 7
less than 6 less than 6

The drugs which are given to the patients suffering from anxiety and metnal tension are known as

1 Mark(s)

Your Answer:

A) tranquilizers A) tranquilizers
B) analgesics B) analgesics
C) antimicrobials C) antimicrobials
D) antibiotics D) antibiotics

A tunnel is dug along a diameter of Earth. A mass dropped into it executes SHM. The time period is:

1 Mark(s)

Your Answer:

24 hours 24 hours
84.6 minutes 84.6 minutes
Infinite Infinite
42.3 minutes 42.3 minutes

When diluting acid always add:

1 Mark(s)

Your Answer:

water to acid water to acid
acid to water acid to water
acid to oxygen acid to oxygen
hydrogen to acid hydrogen to acid

Most of the technologies throughout the world are related to:

1 Mark(s)

Your Answer:

chemistry chemistry
biology biology
mathematics mathematics
physics physics

Acetylene is also called:

1 Mark(s)

Your Answer:

Ethyne Ethyne
ethene ethene
ethane ethane
methane methane

Example of linear polymer is ______________?

1 Mark(s)

Your Answer:

High density polythene High density polythene
Low density polythene Low density polythene
PVC PVC
both A and C both A and C

A bus travels 30 rn in 5 seconds. The speed of the bus is

1 Mark(s)

Your Answer:

A) 6 rn/s A) 6 rn/s
B) 5 rn/s B) 5 rn/s
C) 8rn/s C) 8rn/s
D) 4rn/s D) 4rn/s

The product of the frequency and time period is equal to_________________?

1 Mark(s)

Your Answer:

1 1
2 2
3 3
4 4

The light used in optical fiber transmission is________?

1 Mark(s)

Your Answer:

Dichromatic Dichromatic
Monochromatic Monochromatic
Pentachromatic Pentachromatic
None of these None of these

The largest 5-digit number having only three different digits is

1 Mark(s)

Your Answer:

A) 98978 A) 98978
B) 99897 B) 99897
C) 99987 C) 99987
D) 98799 To get the largest of 5-digit we have to arrange the numbers in descending order. Then, from the given options 99987 is the largest of 5-digit number. Hence correct answer is option (c).

The variation of focal length of a lens with the wavelength of light causes:

1 Mark(s)

Your Answer:

Chromatic Aberration Chromatic Aberration
Spherical Aberration Spherical Aberration
Astigmatism Astigmatism
Coma Coma

The frequency of the fundamental note in an open organ pipe is 300 Hz. If the pipe is dipped in water such that half of it is submerged, the new fundamental frequency will be:

1 Mark(s)

Your Answer:

600 Hz 600 Hz
300 Hz 300 Hz
150 Hz 150 Hz
450 Hz 450 Hz

Two fatty acids that are components of fats are:

1 Mark(s)

Your Answer:

stearic acid and oleic acid stearic acid and oleic acid
butyric acid and caproic acid butyric acid and caproic acid
palmitic acid and oleic acid palmitic acid and oleic acid
none of above none of above

Four polaroids are placed such that the axis of each is inclined at $30^\circ$ to the preceding one. If unpolarized light $I_0$ falls on the first, intensity from the fourth is:

1 Mark(s)

Your Answer:

$3 I_0 / 32$ $3 I_0 / 32$
$9 I_0 / 64$ $9 I_0 / 64$
$27 I_0 / 128$ $27 I_0 / 128$
$I_0 / 16$ $I_0 / 16$

The idea of matrices was introduced by Arthur Caylet in:

1 Mark(s)

Your Answer:

18th century 18th century
19th century 19th century
20th century 20th century
21st century 21st century

Transformers are the application of:

1 Mark(s)

Your Answer:

induction induction
mutual induction mutual induction
electrostatics electrostatics
mutual charges mutual charges

An ice cube containing a lead piece floats in water. What happens to the water level when the ice melts?

1 Mark(s)

Your Answer:

Rises Rises
Falls Falls
Remains same Remains same
Fluctuates Fluctuates

The relationship between Tesla and smaller unit Gauss of magnetic induction is given by_________________?

1 Mark(s)

Your Answer:

1T = 103 G 1T = 103 G
1T = 10-4 G 1T = 10-4 G
1T = 10-2 G 1T = 10-2 G
1T = 104 G 1T = 104 G

Software is referred to as:

1 Mark(s)

Your Answer:

hardware hardware
computer programs computer programs
binary data binary data
procedure procedure

Coating of solid waste with impervious material is known as:?

1 Mark(s)

Your Answer:

Capping Capping
Encapsulation Encapsulation
Landfill Landfill
Chemical fixation Answer Chemical fixation Answer

In p-n-p transistor the collector current is________________?

1 Mark(s)

Your Answer:

equal to emitter current equal to emitter current
slightly less than emitter current slightly less than emitter current
greater than emitter current greater than emitter current
any of above any of above

The coefficient of volume expansion of solids is:

1 Mark(s)

Your Answer:

greater than liquids greater than liquids
equal to gases equal to gases
less than liquids less than liquids
equal to liquids equal to liquids

A body executing simple harmonic motion always vibrates about a:

1 Mark(s)

Your Answer:

nearest position nearest position
variable position variable position
fixed position fixed position
most far position most far position

Two charges are placed in air, then in a medium with $K=81$. The force becomes:

1 Mark(s)

Your Answer:

$81F$ $81F$
$F/81$ $F/81$
$F/9$ $F/9$
$9F$ $9F$

The theoretical yield is, when % yield and actual yied are 55% and 24g respectively:

1 Mark(s)

Your Answer:

40g 40g
43.6g 43.6g
45g 45g
41.4g 41.4g

Which statement is incorrect if X and Y are the two non-empty relations on the set S.

1 Mark(s)

Your Answer:

If X and Y are transitive, then the intersection of X and Y is also transitive.
If X and Y are reflexive, then the intersection of X and Y is also reflexive.
If X and Y are symmetric, then the union of X and Y is not symmetric.
If X and Y are transitive, then the union of X and Y is not transitive.

Organic compounds that are essentially nonpolar and exhibit weak intermolecular forces have________________?

1 Mark(s)

Your Answer:

Low melting points Low melting points
Low vapour pressure Low vapour pressure
High boiling points High boiling points
High electrical conductivity High electrical conductivity

Triglycerides are easily hydrolyzed by enzymes called_________________?

1 Mark(s)

Your Answer:

Lyases Lyases
Ligases Ligases
Lipases Lipases
Hydrolases Hydrolases

Adiabatic process is also called______________?

1 Mark(s)

Your Answer:

Heat exchange process Heat exchange process
Heating process Heating process
Isentropic process Isentropic process
All of the above All of the above

Find the compound interest and the amount on Rs.8000 at 5% per annum for 3 years when C.I is reckoned yearly?

1 Mark(s)

Your Answer:

Rs.1261 Rs.1261
Rs.1440 Rs.1440
Rs.1185 Rs.1185
Rs.1346 Rs.1346

Mercury-in-glass thermometers are used to measure temperature between:

1 Mark(s)

Your Answer:

−20 °C to 150 °C −20 °C to 150 °C
−10 °C to 270 °C −10 °C to 270 °C
−10 °C to 150 °C −10 °C to 150 °C
−10 °C to 180 °C −10 °C to 180 °C

The increase in pressure required to decrease the volume of 200 liters of water by 0.004% is (Bulk modulus of water = $2.1 \times 10^9 Pa$):

1 Mark(s)

Your Answer:

$8.4 kPa$ $8.4 kPa$
$184 kPa$ $184 kPa$
$84 kPa$ $84 kPa$
$8.4 Pa$ $8.4 Pa$

The ratio of the product of the concentration of products to the product of the concentration of reactants is called:

1 Mark(s)

Your Answer:

equilibrium constant equilibrium constant
equilibrium ratio equilibrium ratio
reverse reaction reverse reaction
forward reaction forward reaction

In a half-wave rectifier the r.m.s. value of the A.C. component of the wave is________________?

1 Mark(s)

Your Answer:

Equal to D.C. value Equal to D.C. value
More than D.C. value More than D.C. value
Less than D.C. value Less than D.C. value
Zero Zero

Which of the following has two end points?

1 Mark(s)

Your Answer:

A) Ray A) Ray
B) Line B) Line
C) Line segment C) Line segment
D) None of these D) None of these

Which of the following is not a landmark number in Roman Numerals

1 Mark(s)

Your Answer:

A) 10 A) 10
B) 100 B) 100
C) 1000 C) 1000
D) 10,000 D) 10,000

If velocity $v$ is related to displacement $x$ as $v^2 = 4x$, then acceleration is:

1 Mark(s)

Your Answer:

Variable Variable
$2$ units $2$ units
$4$ units $4$ units
Zero Zero

The safe level of radiation exposure per year is:

1 Mark(s)

Your Answer:

1.0 rem 1.0 rem
2.0 rem 2.0 rem
5.0 rem 5.0 rem
4.0 rem 4.0 rem

The difference between compound interest and simple interest on Rs 8000 at 5% P.a for 3 years is_________?

1 Mark(s)

Your Answer:

Rs 50 Rs 50
Rs 60 Rs 60
Rs 61 Rs 61
Rs 600 Rs 600

Which of the following compounds will react with Tollens reagent ?

1 Mark(s)

Your Answer:

CH3-CHO CH3-CHO
CH3-CH-CH3 CH3-CH-CH3
CH3-COOH CH3-COOH
CH3-CO-CH2-CH3 CH3-CO-CH2-CH3

The quantization of electric charge implies that:

1 Mark(s)

Your Answer:

Charge cannot be created Charge cannot be created
Charge exists as integral multiples of e
Charge is conserved Charge is conserved
Charge is continuous Charge is continuous

Gold is extracted using:

1 Mark(s)

Your Answer:

Amalgamation Amalgamation
Cyanide process Cyanide process
Electrolysis Electrolysis
Roasting Roasting

What is the volume of a cube (in cubic cm) whose diagonal measures 4√3 cm ?

1 Mark(s)

Your Answer:

8 8
16 16
27 27
64 64

Rest mass of a photon is________________?

1 Mark(s)

Your Answer:

infinite infinite
zero zero
very small very small
1.67 x 10-27 kg 1.67 x 10-27 kg

Estimation of amounts of different components in a sample is________________?

1 Mark(s)

Your Answer:

Quantitative analysis Quantitative analysis
Qualitative analysis Qualitative analysis
Stochiometery Stochiometery
Physical chemistry Physical chemistry

Evaluating Your Answers

JEE Main Mock Test 16 : Question 1 of 53