JEE Advanced Mock Test 7 - Online MCQ Exam

Tanθ equals to:

1 Mark(s)

Your Answer:

1 ⁄ cosecθ 1 ⁄ cosecθ
1 ⁄ secθ 1 ⁄ secθ
1 ⁄ cosθ 1 ⁄ cosθ
1 ⁄ cotθ 1 ⁄ cotθ

Cement is a mixture of so many compounds roasted in rotary kiln. Which substances has greater percentage ?

1 Mark(s)

Your Answer:

Lime (CaO) Lime (CaO)
Silica (SiO2) Silica (SiO2)
Alumina (Al2O3) Alumina (Al2O3)
Magnesia (MgO) Magnesia (MgO)

If the coordinates of two points A and B are (2, -4) and (-6, 7), then the value of (x-coordinate of B) – (x-coordinate of A) is:

1 Mark(s)

Your Answer:

A) 11 A) 11
B) -8 B) -8
C) – 11 C) – 11
D) 8 D) 8

An object approaches a convex lens from infinity. The image moves:

1 Mark(s)

Your Answer:

Towards the lens Towards the lens
Away from the lens Away from the lens
Stays at F Stays at F
Moves to infinity then back Moves to infinity then back

The angular resolution of a telescope of aperture diameter $D$ observing a wavelength $\lambda$ is:

1 Mark(s)

Your Answer:

$1.22 \lambda / D$ $1.22 \lambda / D$
$1.22 D / \lambda$ $1.22 D / \lambda$
$\lambda / D$ $\lambda / D$
$D / \lambda$ $D / \lambda$

At what price must an article costing Rs.47.50 be marked in order that after deducting 5% from the list price. It may be sold at a profit of 25% on the cost price?

1 Mark(s)

Your Answer:

Rs.62.50 Rs.62.50
Rs.72.50 Rs.72.50
Rs.75.00 Rs.75.00
Rs.80.00 Rs.80.00

The line passing through the two centers of curvatures of the lens is called:

1 Mark(s)

Your Answer:

principal axis principal axis
optical center optical center
principal focus principal focus
focal length focal length

Vitamin D is soluble in:

1 Mark(s)

Your Answer:

fat fat
water water
ethers ethers
phenols phenols

Friedel-Crafts alkylation of benzene uses:

1 Mark(s)

Your Answer:

$\ce{AlCl3}$ catalyst $\ce{AlCl3}$ catalyst
Base catalyst Base catalyst
Radical initiator Radical initiator
Heat only Heat only

The power transmitted by a wave on a string is given by:

1 Mark(s)

Your Answer:

$\frac{1}{2} \mu \omega^2 A^2 v$ $\frac{1}{2} \mu \omega^2 A^2 v$
$\mu \omega^2 A^2 v$ $\mu \omega^2 A^2 v$
$2 \pi^2 f^2 A^2 \rho v$ $2 \pi^2 f^2 A^2 \rho v$
$\frac{1}{2} \rho \omega^2 A^2$ $\frac{1}{2} \rho \omega^2 A^2$

Gypsum is applied to the soil as a source of________________?

1 Mark(s)

Your Answer:

Ca and P Ca and P
S and P S and P
Ca and S Ca and S
we could not apply we could not apply

a – b = 7 and ab = 9, then a 2 + b 2 =

1 Mark(s)

Your Answer:

A) 31 A) 31
B) 67 B) 67
C) 40 C) 40
D) 58 D) 58

What is the value of sin θ/(1 + cos θ) + sin θ/(1 - cos θ), where (00 < θ < 900)?

1 Mark(s)

Your Answer:

2cosec θ 2cosec θ
2tan θ 2tan θ
2cot θ 2cot θ
None of the above None of the above

Between any two numbers, there are -

1 Mark(s)

Your Answer:

Two rational numbers Two rational numbers
No rational number No rational number
Infinite rational numbers Infinite rational numbers
None of the above None of the above

Which of the following is not true about nitrogen dioxide?

1 Mark(s)

Your Answer:

it is reddish brown it is reddish brown
it has pungent odor it has pungent odor
it is insoluble in water it is insoluble in water
it is toxic it is toxic

Which of the following is a polynomial?

1 Mark(s)

Your Answer:

A) x 2 + x + $\frac{3}{x^2}$ A) x 2 + x + $\frac{3}{x^2}$
B) √x + 5 B) √x + 5
C) x 3/4 – 7x + 4 C) x 3/4 – 7x + 4
D) $\frac{3}{2}$x 3 – $\frac{4}{3}$x 2 + 2x – 1 (\frac{3}{2}\)x 3 – $\frac{4}{3}$x 2 + 2x – 1

In multimode step index fibre the refractive index of core and cladding is____________?

1 Mark(s)

Your Answer:

same same
different different
zero zero
different with refractive index of core higher than cladding

Which of the following is produced when electrical discharges pass through oxygen in the air?

1 Mark(s)

Your Answer:

chlorofluorocarbons chlorofluorocarbons
methane methane
ozone ozone
lead compounds lead compounds

In full wave rectification the output D.C. voltage across the load is obtained for_____________?

1 Mark(s)

Your Answer:

The positive half cycle of input A.C. The positive half cycle of input A.C.
The negative half cycle of input A.C. The negative half cycle of input A.C.
The complete cycle of input A.C. The complete cycle of input A.C.
All of the above. All of the above.

Raheem bought an old car for Rs. 42000. He spent Rs. 13000 on repairs and sold it for Rs. 64900. What is his profit percent?

1 Mark(s)

Your Answer:

14% 14%
16% 16%
18% 18%
22% 22%
None of these None of these

If X = {1, 2, 3, 4, 5} and Y = {2, 4, 5, 6, 8} then X - Y equals to:

1 Mark(s)

Your Answer:

{6, 8} {6, 8}
{1, 3} {1, 3}
{4, 5} {4, 5}
{1, 6} {1, 6}

Considering the methods for making salt, the reaction of acid and base gives:

1 Mark(s)

Your Answer:

salt and water salt and water
salt and hydrogen salt and hydrogen
salt, carbon dioxide and water salt, carbon dioxide and water
salt and salt salt and salt

The reflection by the rough surfaces is called:

1 Mark(s)

Your Answer:

regular reflection regular reflection
irregular reflection irregular reflection
regular refraction regular refraction
irregular refraction irregular refraction

How many isomers are contained by pentane?

1 Mark(s)

Your Answer:

two two
three three
four four
five five

Which of the following is NOT a drawback of the heating effects of electric current?

1 Mark(s)

Your Answer:

A) Loss of electric energy during transmission
B) Melting of plastic sockets and plugs due to overheating
C) Heating of water with an immersion rod
D) Fires due to electric short circuits D) Fires due to electric short circuits

The base of the Mesopotamian number system is

1 Mark(s)

Your Answer:

A) 10 A) 10
B) 20 B) 20
C) 30 C) 30
D) 60 D) 60

The purpose of flywheel in the engines is________________?

1 Mark(s)

Your Answer:

to smooth out the energy variation to smooth out the energy variation
to add more weight to engine to work it stable
to start engine to start engine
both A and B both A and B

The overall rate of a reaction is governed by

1 Mark(s)

Your Answer:

A) the rate of fastest intermediate’step
B) the sum total of the rates of all intermediate steps
C) the average of the rates of all the intermediate steps
D) the rate of slowest intermediate step

What is the term used for the process in which there is an addition of nascent hydrogen?

1 Mark(s)

Your Answer:

hydrogenation hydrogenation
dehydration dehydration
reduction reduction
oxidation oxidation

The value of 32 – (64 + 16) + 3 × 6 is

1 Mark(s)

Your Answer:

A) 31 A) 31
B) -32 B) -32
C) -30 C) -30
D) 30 D) 30

The heaviest subatomic particle among the following is_________?

1 Mark(s)

Your Answer:

Electron Electron
Proton Proton
Neutron Neutron
All have mass All have mass

At equilibrium the rate of dissociation of a solid solute in a volatile liquid solvent is

1 Mark(s)

Your Answer:

A) less than the rate of crystallisation
B) greater than the rate of crystallisation
C) equal to the rate of crystallisation C) equal to the rate of crystallisation
D) zero D) zero

Paramagnetism is due to:

1 Mark(s)

Your Answer:

Paired electrons Paired electrons
Unpaired electrons Unpaired electrons
No electrons No electrons
Double bonds Double bonds

The strength of radiations to penetrate a certain material is known as:

1 Mark(s)

Your Answer:

splitting power splitting power
ionization power ionization power
penetrating power penetrating power
radiation power radiation power

A candidate who gets 30% of the marks fails by 50 marks. But another candidate who gets 45% marks gets 25 marks more than necessary for passing. Find the number of marks for passing?

1 Mark(s)

Your Answer:

150 150
200 200
250 250
275 275

Radioactivity is a ______ (A) Spontaneous activity (B) Chemical property_____________?

1 Mark(s)

Your Answer:

A & B A & B
B & C B & C
C & A C & A
A B & C A B & C

Which molecule violates octet rule?

1 Mark(s)

Your Answer:

$\ce{CO2}$ $\ce{CO2}$
$\ce{H2O}$ $\ce{H2O}$
$\ce{SF6}$ $\ce{SF6}$
$\ce{NH3}$ $\ce{NH3}$

The escape of gas molecules from a small hole one after the other is called:

1 Mark(s)

Your Answer:

diffusion diffusion
effusion effusion
concentration concentration
mobility mobility

Pipe A can fill a tank in 6 hours. Due to a leak at the bottom, it takes 9 hours for the pipe A to fill the tank. In what time can the leak alone empty the full tank?

1 Mark(s)

Your Answer:

16 hours 16 hours
15 hours 15 hours
18 hours 18 hours
17 hours 17 hours

Evaluating Your Answers

JEE Advanced Mock Test 7 : Question 1 of 39