JEE Main Mock Test 14 - Online MCQ Exam

What should be avoided when handling a laboratory thermometer?

1 Mark(s)

Your Answer:

A) Holding it by the bulb A) Holding it by the bulb
B) Immersing it in the substance B) Immersing it in the substance
C) Reading it at eye level C) Reading it at eye level
D) Keeping it vertical D) Keeping it vertical

If the time period of a simple pendulum is 2 s then it's length is:

1 Mark(s)

Your Answer:

1.02m 1.02m
1.2m 1.2m
1.4m 1.4m
1.5m 1.5m

The process of finding the quotient and remainder, when a polynomial is divided by a linear polynomial is known as:

1 Mark(s)

Your Answer:

synthetic division synthetic division
symmetric division symmetric division
non-synthetic division non-synthetic division
extraneous division extraneous division

Benzene is more stable than cyclohexatriene by:

1 Mark(s)

Your Answer:

5 kcal/mol 5 kcal/mol
15 kcal/mol 15 kcal/mol
36 kcal/mol 36 kcal/mol
50 kcal/mol 50 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°

If the mass of bob is increased 3 times then it's period:

1 Mark(s)

Your Answer:

increases increases
decreases 2 times decreases 2 times
remains same remains same
increases 4 times increases 4 times

The refractive index of glass is minimum for which color?

1 Mark(s)

Your Answer:

Violet Violet
Blue Blue
Green Green
Red Red

The following bar graph shows the number of members in each family of a colony. The number of families having 3 members is

1 Mark(s)

Your Answer:

A) 25 A) 25
B) 30 B) 30
C) 35 C) 35
D) 40 D) 40

Bases leave blue litmus:

1 Mark(s)

Your Answer:

red red
pint pint
black black
unchanged unchanged

A black body is one which:

1 Mark(s)

Your Answer:

Reflects all radiation Reflects all radiation
Absorbs all radiation Absorbs all radiation
Transmits all radiation Transmits all radiation
Emits white light only Emits white light only

Metallic character of elements:

1 Mark(s)

Your Answer:

Increases down group and left in period Increases down group and left in period
Increases up group and right in period Increases up group and right in period
Increases with atomic number Increases with atomic number
Decreases down group Decreases down group

Which of the following will not show geometrical isomerism?

1 Mark(s)

Your Answer:

A) [Cr(NH 3 ) 4 Cl 2 ]Cl A) [Cr(NH 3 ) 4 Cl 2 ]Cl
B) [Co(en) 2 Cl 2 ]Cl B) [Co(en) 2 Cl 2 ]Cl
C) [(Co(NH 3 ) 5 NO 2 ]Cl 2 C) [(Co(NH 3 ) 5 NO 2 ]Cl 2
D) [Pt(NH 3 ) 2 Cl 2 ] D) [Pt(NH 3 ) 2 Cl 2 ]

As we move across the period the basic character of oxides:

1 Mark(s)

Your Answer:

increases increases
remains same remains same
decreases decreases
becomes zero becomes zero

Stephen reduction converts:

1 Mark(s)

Your Answer:

Acid to aldehyde Acid to aldehyde
Ester to aldehyde Ester to aldehyde
Nitrile to aldehyde Nitrile to aldehyde
Amide to aldehyde Amide to aldehyde

Why do we determined the boiling point of a liquid?

1 Mark(s)

Your Answer:

To check its Acidity and Basicity To check its Acidity and Basicity
To Check temperature To Check temperature
To check its Purity and nature To check its Purity and nature
None of These None of These

Asghar traveled from his house to his office at 10 km/hr and returned at rate of 9 km/hr. Rohit travelled through the same path both ways at 12 km/hr and took 10 minutes less than Asghar. What is the distance between Asghar’s house and his office?

1 Mark(s)

Your Answer:

3000m 3000m
7500m 7500m
3750m 3750m
7000m 7000m

The shear modulus is also known as:

1 Mark(s)

Your Answer:

Modulus of Rigidity Modulus of Rigidity
Bulk Modulus Bulk Modulus
Young's Modulus Young's Modulus
Coefficient of Elasticity Coefficient of Elasticity

Angles that are greater than 180° and less than 360° are called:

1 Mark(s)

Your Answer:

reflective angles reflective angles
obtuse angles obtuse angles
acute angles acute angles
right angles right angles

The oxides of beryllium BeO is_______________?

1 Mark(s)

Your Answer:

Acidic Acidic
Basic Basic
Amphoteric Amphoteric
Neutral Neutral

Which sequence of steps is correct for the manufacture of cement ?

1 Mark(s)

Your Answer:

crushing heating mixing grinding crushing heating mixing grinding
crushing mixing heating grinding and mixing
crushing grinding mixing heating crushing grinding mixing heating
mixing heating grinding crushing mixing heating grinding crushing

If the diameter of a cylinder is 5cm and the volume of cylinder is 650cm³ then the height of cylinder is:

1 Mark(s)

Your Answer:

40cm 40cm
25cm 25cm
33cm 33cm
45cm 45cm

A line going through the midpoint from one side to the other side of a circle is called:

1 Mark(s)

Your Answer:

angle angle
area area
radius radius
diameter diameter

To send the sound waves to far off areas, they are converted to:

1 Mark(s)

Your Answer:

radio waves radio waves
frequency frequency
microwaves microwaves
electromagnetic waves electromagnetic waves

Tetraethyl lead is used as______?

1 Mark(s)

Your Answer:

Pain Killer Pain Killer
Fire Extinguisher Fire Extinguisher
Mosquito Repellent Mosquito Repellent
Petrol Additive Petrol Additive

Reduction of nitrobenzene in acidic medium gives:

1 Mark(s)

Your Answer:

Azobenzene Azobenzene
Hydrazobenzene Hydrazobenzene
Aniline Aniline
Nitrosobenzene Nitrosobenzene

The motion of ceiling fan:

1 Mark(s)

Your Answer:

is SHM is SHM
isn't SHM isn't SHM
Linear Linear
quadratic quadratic

Find the greatest number which, while dividing 19, 83 and 67, gives a remainder of 3 in each case?

1 Mark(s)

Your Answer:

16 16
17 17
18 18
19 19

The number 76.85 is rounded off up to two significant figures as_____________?

1 Mark(s)

Your Answer:

76.8 76.8
77 77
76.9 76.9
None of these None of these

Contact process is used for:

1 Mark(s)

Your Answer:

$\ce{H2SO4}$ $\ce{H2SO4}$
$\ce{HNO3}$ $\ce{HNO3}$
$\ce{NH3}$ $\ce{NH3}$
$\ce{H3PO4}$ $\ce{H3PO4}$

Which of the following objects does not belong to the same group?

1 Mark(s)

Your Answer:

A) Aluminium foil A) Aluminium foil
B) Copper wire B) Copper wire
C) Steel tumbler C) Steel tumbler
D) Plastic cup D) Plastic cup

Bleaching powder is an example of________________?

1 Mark(s)

Your Answer:

Normal salt Normal salt
Double salt Double salt
Mixed salt Mixed salt
Complex Complex

The matrix A = $\left[\begin{array}{ll} 0 & 1 \\ 1 & 0 \end{array}\right]$ is a

1 Mark(s)

Your Answer:

A) unit matrix A) unit matrix
B) diagonal matrix B) diagonal matrix
C) symmetric matrix C) symmetric matrix
D) skew-symmetric matrix D) skew-symmetric matrix

Fora reaction x + y → z, rate ∝ |X|. What is (i) moleculariiy and (ii) order of reaction?

1 Mark(s)

Your Answer:

A) (i)2, (ii) 1 A) (i)2, (ii) 1
B) (i)2,(ii) 2 B) (i)2,(ii) 2
C) (i) 1, (ii) 1 C) (i) 1, (ii) 1
D) (i) 1, (ii) 2 D) (i) 1, (ii) 2

The unit of electric power is:

1 Mark(s)

Your Answer:

ms ms
watt watt
Pascal Pascal
farad farad

Color imparted to the Bunsen flame by strontium salt is:?

1 Mark(s)

Your Answer:

Apple green Apple green
Bluish green Bluish green
Crimson red Crimson red
Brick red Answer Brick red Answer

What is $\frac{15}{19} - \frac{10}{19}$?

1 Mark(s)

Your Answer:

$\frac{4}{19}$ $\frac{4}{19}$
$\frac{5}{19}$ $\frac{5}{19}$
$\frac{6}{19}$ $\frac{6}{19}$
$\frac{1}{4}$ $\frac{1}{4}$

In multiplication and division of measurement______________?

1 Mark(s)

Your Answer:

Percentage uncertainties are added Percentage uncertainties are added
Absolute uncertainties are added Absolute uncertainties are added
Percentage uncertainties are divided Percentage uncertainties are divided
Absolute uncertainties are divided Absolute uncertainties are divided

What is $33 \times 9$?

1 Mark(s)

Your Answer:

288 288
297 297
306 306
315 315

The general formula for amines is:

1 Mark(s)

Your Answer:

R-CH2 R-CH2
R2CH R2CH
R-NH2 R-NH2
R-COOH R-COOH

Which noble gas is most abundant?

1 Mark(s)

Your Answer:

Helium Helium
Argon Argon
Neon Neon
Krypton Krypton

The ratio of a and b should be written as:

1 Mark(s)

Your Answer:

a : b a : b
a + b a + b
b + a b + a
b : a b : a

A company has 7348 bars of soap. If the company sells 20% of its bars of soap .how many bars of soap did it sell?

1 Mark(s)

Your Answer:

734.8 734.8
1469.6 1469.6
146950 146950
29390 29390

To protect the leaves from the external electrical disturbance, we use:

1 Mark(s)

Your Answer:

chords chords
capacitors capacitors
mercury foil mercury foil
aluminum foil aluminum foil

Out of the following, the one angle which is acute is:

1 Mark(s)

Your Answer:

23⁄86 of a complete rotation 23⁄86 of a complete rotation
4⁄9 of a right angle 4⁄9 of a right angle
45⁄47 of a right angle 45⁄47 of a right angle
10⁄20 of a complete rotation 10⁄20 of a complete rotation

Bronze is alloy of:

1 Mark(s)

Your Answer:

Cu and Sn Cu and Sn
Cu and Zn Cu and Zn
Fe and C Fe and C
Al and Cu Al and Cu

Metals are refined by using different methods. Which of the following metals are refined by electrolytic refining? (i) Au (ii) Cu (iii) Na (iv) K

1 Mark(s)

Your Answer:

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

The chemistry of lithium is very similar to that of magnesium even though they are placed in different groups. Its reason is:

1 Mark(s)

Your Answer:

A) Both are found together in nature A) Both are found together in nature
B) Both have nearly the same size B) Both have nearly the same size
C) Both have similar electronic configuration
D) The ratio of their charge and size (i.e. charge density) is nearly the same

The direction of the force on a current-carrying wire in a magnetic field can be found by using:

1 Mark(s)

Your Answer:

left hand grip rule left hand grip rule
right hand grip rule right hand grip rule
Fleming's left hand rule Fleming's left hand rule
Fleming's right hand rule Fleming's right hand rule

The last step of metallurgy is:

1 Mark(s)

Your Answer:

crushing, grinding or pulverizing of the ore
concentration of the ore concentration of the ore
extraction of metal extraction of metal
refining of metal refining of metal

The mechanical waves in which particles of the medium vibrate about their mean position perpendicular to 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

The period of a circular motion is given by_______________?

1 Mark(s)

Your Answer:

T = πv T = πv
T = πw T = πw
T = 2πr T = 2πr
T = 2πr/v T = 2πr/v

The value of 25.25 – 23.23 + 24.24 is_________?

1 Mark(s)

Your Answer:

26 26
26.26 26.26
2.2 2.2
-22.22 -22.22

The magnetic properties of a magnet cannot be destroyed by

1 Mark(s)

Your Answer:

A) hammering A) hammering
B) heating B) heating
C) dropping on a hard surface C) dropping on a hard surface
D) storing properly D) storing properly

Which of the elements show passivity when treated with conc. HNO3?

1 Mark(s)

Your Answer:

Fe Fe
A A
Cr Cr
All of the above All of the above

Evaluating Your Answers

JEE Main Mock Test 14 : Question 1 of 54