ECAT Mock Test 5 - Online MCQ Exam

How many times does the digit ‘7’ appear when writing all the numbers from 1 to 100?

1 Mark(s)

Your Answer:

A) 10 A) 10
B) 15 B) 15
C) 20 C) 20
D) 25 (10 times), and 87th, 97th, totaling 20 times. Hence correct answer is option (c).

One mole of ideal gas goes through process $P = P_0 [1 - \frac{1}{2}(V_0/V)^2]$. Temperature at $V=V_0$ is:

1 Mark(s)

Your Answer:

$P_0 V_0 / 2R$ $P_0 V_0 / 2R$
$P_0 V_0 / R$ $P_0 V_0 / R$
$2 P_0 V_0 / R$ $2 P_0 V_0 / R$
$P_0 V_0 / 4R$ $P_0 V_0 / 4R$

Pawan said to me, "If I hear any news, I'll phone you."

1 Mark(s)

Your Answer:

Pawan told me that if he heard any news, he will phone me.
Pawan told me that if he will hear my news, he will phone me.
Pawan told me that if he had heard any news, he would phone me.
Pawan told me that if he heard any news, he would phone me.

Choose the correct antonym of ruthless:

1 Mark(s)

Your Answer:

Majestic Majestic
Grief Grief
Merciful Merciful
Pity Pity

The agency which provides the potential difference for the steady flow of current in the copper wire is the:

1 Mark(s)

Your Answer:

battery battery
voltmeter voltmeter
galvanometer galvanometer
ammeter ammeter

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

Select the antonym of Perdition.

1 Mark(s)

Your Answer:

Infernal Infernal
Doom Doom
Hell Hell
Heaven Heaven

A rectangular block of mass $m$ and area of cross-section $A$ floats in a liquid of density $\rho$. If given a small vertical displacement, the time period is:

1 Mark(s)

Your Answer:

$2\pi \sqrt{\frac{m}{\rho A g}}$ $2\pi \sqrt{\frac{m}{\rho A g}}$
$2\pi \sqrt{\frac{\rho A g}{m}}$ $2\pi \sqrt{\frac{\rho A g}{m}}$
$2\pi \sqrt{\frac{m}{\rho g}}$ $2\pi \sqrt{\frac{m}{\rho g}}$
$2\pi \sqrt{\frac{A \rho}{m g}}$ $2\pi \sqrt{\frac{A \rho}{m g}}$

Rama is good . . . . . . . . dancing.

1 Mark(s)

Your Answer:

about about
on on
for for
at at

For the reaction 2HI ____________> H2+ I2

1 Mark(s)

Your Answer:

Kp > kc Kp > kc
Kc > kp Kc > kp
Kp= kc Kp= kc
Kp ≤ kc Kp ≤ kc

In a kilometer race, A beats B by 50 meters or 10 seconds. What time does A take to complete the race?

1 Mark(s)

Your Answer:

200 sec 200 sec
190 sec 190 sec
210 sec 210 sec
150 sec 150 sec

. . . . . . . . the years, things got better.

1 Mark(s)

Your Answer:

Over Over
About About
In In
Of Of

Carboxylic acids are more acidic than phenols because:

1 Mark(s)

Your Answer:

Larger size Larger size
Higher molecular mass Higher molecular mass
Better resonance stabilization Better resonance stabilization
More polar More polar

A nut has been tightened by a force of 180 N using an 8 cm long spanner. What length of a spanner is required to loosen the same nut with 150 N force:

1 Mark(s)

Your Answer:

11 cm 11 cm
8.5 cm 8.5 cm
9.6 cm 9.6 cm
10.9 cm 10.9 cm

Asked :

1 Mark(s)

Your Answer:

Ordered Ordered
Ignored Ignored
Requested Requested
Directed Directed
Refused Refused

The perimeter of the figure

1 Mark(s)

Your Answer:

A) 20 cm A) 20 cm
B) 10 cm B) 10 cm
C) 24 cm C) 24 cm
D) 15 cm. D) 15 cm.

Circumference of the circle is calculated by:

1 Mark(s)

Your Answer:

2πr 2πr
2π ⁄ r 2π ⁄ r
πr ⁄ 2 πr ⁄ 2
πr πr

The radius of a circle is increased by 1%. Find how much % does its area increases?

1 Mark(s)

Your Answer:

1.01% 1.01%
5.01% 5.01%
3.01% 3.01%
2.01% 2.01%

Idiom “A beast of burden” means :

1 Mark(s)

Your Answer:

a person or animal used for carrying heavy loads or does hard work.
a wild animal used in the circus. a wild animal used in the circus.
a dangerous animal. a dangerous animal.
a person who enjoys lifting weights. a person who enjoys lifting weights.

The past tense of 'Eat' is:

1 Mark(s)

Your Answer:

Eated Eated
Ate Ate
Eaten Eaten
Eating Eating

Radioactive decay releases:

1 Mark(s)

Your Answer:

Only heat Only heat
Only electricity Only electricity
Energy as particles/rays Energy as particles/rays
Only sound Only sound

Linear equation is also called:

1 Mark(s)

Your Answer:

second degree equation second degree equation
first degree equation first degree equation
zero degree equation zero degree equation
simultaneous equation simultaneous equation

Since the beginning of history P : have managed to catch Q : the Eskimos and Red Indians R : by a very difficulty method S : a few specimens of this aquatic animal The Proper sequence should be:

1 Mark(s)

Your Answer:

QRPS QRPS
SQPR SQPR
SQRP SQRP
QPSR QPSR

Fill in the blanks with numbers and boxes by signs, so that the expressions on both sides are equal.

1 Mark(s)

Your Answer:

A) 4 × (6 + 5) = 4 × 6 + 4 × 5 A) 4 × (6 + 5) = 4 × 6 + 4 × 5
B) (7 + 3) × 5 = 7 × 5 + 3 × 5 B) (7 + 3) × 5 = 7 × 5 + 3 × 5
C) 2 × (5 + 4) = 2 × 5 + 2 × ___________
D) (11 + 4) × 7= 11 × 7 + 4 × ___________ (e) 6 × (__________ + 8) = 6 × 4 + ___________ (f) (_______ + 7) × 4 = 12 × 4 + ____________

1 kB is equal to:

1 Mark(s)

Your Answer:

1024 bytes 1024 bytes
1250 bytes 1250 bytes
1524 bytes 1524 bytes
1169 bytes 1169 bytes

A magnet is cut into two equal halves along its length. Pole strength of each half:

1 Mark(s)

Your Answer:

Remains same Remains same
Halves Halves
Doubles Doubles
Becomes zero Becomes zero

If the length of one side of a perfect square is 14cm then the area of that square must be:

1 Mark(s)

Your Answer:

196cm² 196cm²
169cm² 169cm²
216cm² 216cm²
144cm² 144cm²

She cooks, washes dishes, does her homework and then relaxing.

1 Mark(s)

Your Answer:

relaxing then relaxing then
then is relaxing then is relaxing
relaxing is then relaxing is then
then relaxes then relaxes
No correction required No correction required

During electrolysis of Water, the product obtained at cathode is ___________?

1 Mark(s)

Your Answer:

Hydrogen Gas &Water Hydrogen Gas &Water
Oxygen Gas &Water Oxygen Gas &Water
Only oxygen Only oxygen
Only Water Aamir khan Hullio Only Water Aamir khan Hullio

A confusing and difficult problem or question.

1 Mark(s)

Your Answer:

Conundrum Conundrum
Memories Memories
Prodigy Prodigy
Pandemonium Pandemonium

What is represented by each figure within a square bracket in the equilibrium expression?

1 Mark(s)

Your Answer:

concentration in mol.dm-3 concentration in mol.dm-3
volume of products volume of products
mass of products mass of products
mass of reactants mass of reactants

A doctor who treats skin diseases:

1 Mark(s)

Your Answer:

Ophthalmologist Ophthalmologist
Dermatologist Dermatologist
Paediatrician Paediatrician
Cardiologist Cardiologist

Ali must have the________to stick to his diet, if he wants to lose weight.

1 Mark(s)

Your Answer:

obstinacy obstinacy
determination determination
decision decision
obligation obligation

The movement of molecules from higher concentration to lower concentration is called:

1 Mark(s)

Your Answer:

diffusion diffusion
concentration concentration
effusion effusion
mobility mobility

Which of the following causes hard deposits in kidneys and joints when taken in excess amount?

1 Mark(s)

Your Answer:

vitamin A vitamin A
vitamin B vitamin B
vitamin C vitamin C
vitamin D vitamin D

A cistern of capacity 8000 litres measures externally 3.3 m by 2.6 m by 1.1 m and its walls are 5 cm thick. The thickness of the bottom is__________?

1 Mark(s)

Your Answer:

90 cm 90 cm
1 dm 1 dm
1 m 1 m
1.1 cm 1.1 cm

RNA contains:

1 Mark(s)

Your Answer:

Thymine Thymine
Adenine Adenine
Cytosine Cytosine
Uracil Uracil

LAUD

1 Mark(s)

Your Answer:

Lord Lord
Eulogy Eulogy
Praise Praise
Extolled Extolled

A cistern can be filled by pipe A in \$12$ hours and by pipe B in \$18$ hours. Both pipes are opened together but pipe A is closed after \$4$ hours. In how many more hours will the cistern be filled?

1 Mark(s)

Your Answer:

7 hours 7 hours
8 hours 8 hours
9 hours 9 hours
10 hours 10 hours

The largest number, which always divides the sum of any pair of consecutive odd numbers is

1 Mark(s)

Your Answer:

A) 2 A) 2
B) 4 B) 4
C) 6 C) 6
D) 8 D) 8

A pipe with a larger cross-sectional area than other offers:

1 Mark(s)

Your Answer:

small resistance small resistance
large resistance large resistance
equal resistance equal resistance
variable resistance variable resistance

Synonym of “eschew” is _________?

1 Mark(s)

Your Answer:

to avoid to avoid
argue argue
forget forget
spit out spit out

The minimum wavelength of X-rays produced by the bombardment of electrons on the screen of a television set where the accelerating potential is 2.0K V will be______________?

1 Mark(s)

Your Answer:

6.2 x 10-10m 6.2 x 10-10m
9.1 x 10-18m 9.1 x 10-18m
3.11 x 10-10m 3.11 x 10-10m
4 x 10-10m 4 x 10-10m

A polynomial of degree ‘2’ is called:

1 Mark(s)

Your Answer:

zero polynomial zero polynomial
cubic polynomial cubic polynomial
linear polynomial linear polynomial
quadratic polynomial quadratic polynomial

Which of the following is a code that stores information which is used to produce proteins?

1 Mark(s)

Your Answer:

structure of the base pairs structure of the base pairs
order of the base pairs order of the base pairs
number of the base pairs number of the base pairs
number of hydrogen number of hydrogen

The filter over which sewage is sprinkled is called as:?

1 Mark(s)

Your Answer:

Contact bed Contact bed
Percolating filter Percolating filter
Trickling filter Trickling filter
Intermittent sand filter Answer Intermittent sand filter Answer

Electrical resonance is observed in_______________?

1 Mark(s)

Your Answer:

Radio Radio
Microwave oven Microwave oven
Both in radio and microwave oven Both in radio and microwave oven
Neither in radio nor in a microwave oven

Which prefix represents $10^{15}$?

1 Mark(s)

Your Answer:

Tera Tera
Giga Giga
Exa Exa
Peta Peta

Evaluating Your Answers

ECAT Mock Test 5 : Question 1 of 48