BUET Admission Mock Test 11

Following figures are formed by joining six unit squares. Which figure has smallest perimeter? (NCERT Exemplar)

1 Mark(s)

Your Answer:

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

Benzene gives mainly_________?

1 Mark(s)

Your Answer:

Addition reaction Addition reaction
Substitution reactions Substitution reactions
Halogenation Halogenation
All of these All of these

When Ammonia is used as a refrigerant in vapour compression cycle?

1 Mark(s)

Your Answer:

Cu Tubing used Cu Tubing used
Steel tubes used Steel tubes used
Both a & b Both a & b
Material does not effect by refrigerant Material does not effect by refrigerant

Diamond conducts heat due to:

1 Mark(s)

Your Answer:

free electrons free electrons
strong bonding strong bonding
weak bonding weak bonding
radiation radiation

A man rows his boat 85 km downstream and 45 km upstream, taking 2 1/2 hours each time. Find the speed of the stream?

1 Mark(s)

Your Answer:

5 kmph 5 kmph
6 kmph 6 kmph
7 kmph 7 kmph
8 kmph 8 kmph

On hydrolysis, all proteins produce:

1 Mark(s)

Your Answer:

amines amines
peptide bonds peptide bonds
amino acids amino acids
dipeptide dipeptide

The barometer is invented by:

1 Mark(s)

Your Answer:

Galileo Galileo
Robert Boyle Robert Boyle
Charles Charles
Torricelli Torricelli

Who experimentally proved the existence of EM waves?

1 Mark(s)

Your Answer:

Maxwell Maxwell
Hertz Hertz
Marconi Marconi
Bose Bose

If the mean free path is $\lambda$ at 1 atm, then at 5 atm (constant T), it will be:

1 Mark(s)

Your Answer:

$5\lambda$ $5\lambda$
$\lambda/5$ $\lambda/5$
$\lambda$ $\lambda$
$25\lambda$ $25\lambda$

Considering the inequalities, nine is:

1 Mark(s)

Your Answer:

< 11 < 11
< 5 < 5
< 7 < 7
> 14 > 14

The HCF of 450 and 540 is:

1 Mark(s)

Your Answer:

30 30
24 24
20 20
16 16

When alpha and beta particles are slowed down by collisions, they become:

1 Mark(s)

Your Answer:

harmful harmful
harmless harmless
useful useful
expensive expensive

The greatest ionization power is possessed by:

1 Mark(s)

Your Answer:

beta particles beta particles
gamma particles gamma particles
neutrons neutrons
alpha particles alpha particles

If sin (θ + 180) = cos 600, then what is the value of cos5θ, where 00 < θ < 900?

1 Mark(s)

Your Answer:

0 0
1/2 1/2
1 1
2 2

Synthesis of ethanal commercially from which of the following reagent is the part of green chemistry?

1 Mark(s)

Your Answer:

A) CH 3 CH 2 OH A) CH 3 CH 2 OH
B) CH 2 = CH 2 B) CH 2 = CH 2
C) HC ≡ CH C) HC ≡ CH
D) All of these D) All of these

Why are roads banked at curves?

1 Mark(s)

Your Answer:

To reduce friction To reduce friction
To provide centripetal force To provide centripetal force
To increase friction To increase friction
To look good To look good

If the OH group is attached to the benzene ring, the compound form is:

1 Mark(s)

Your Answer:

alcohol alcohol
phenol phenol
alkene alkene
alkyne alkyne

How does chlorine react?

1 Mark(s)

Your Answer:

explosively explosively
slowly in dark but rapidly in strong sunlight
requires high temperature or strong sun light
essentially unreactive essentially unreactive

If the difference between three times and seven times of a number is equal to 36, what will be the number?

1 Mark(s)

Your Answer:

9 9
4 4
1 1
8 8

A train when moves at an average speed of 40 kmph, reaches its destination on time. When its average speed becomes 35 kmph, then it reaches its destination 15 minutes late. Find the length of journey.

1 Mark(s)

Your Answer:

30 km 30 km
40 km 40 km
70 km 70 km
80 km 80 km

The OR operation can be represented as:

1 Mark(s)

Your Answer:

X = A + B X = A + B
X = A x B X = A x B
X = A - B X = A - B
X = A ⁄ B X = A ⁄ B

A particle is projected from the ground with velocity $u$ at angle $\theta$. Its average velocity between the point of projection and the highest point is:

1 Mark(s)

Your Answer:

$u \cos\theta$ $u \cos\theta$
$u/2$ $u/2$
$\frac{u}{2}\sqrt{1+3\cos^2\theta}$ $\frac{u}{2}\sqrt{1+3\cos^2\theta}$
$u$ $u$

A man gains 20% by selling an article for a certain price. If the sells it at double the price, the percentage of profit will be:________?

1 Mark(s)

Your Answer:

40 40
100 100
120 120
140 140

The angle of elevation of a ladder leaning against a wall is 60° and the foot of the ladder is 4.6 m away from the wall. The length of the ladder is :_________?

1 Mark(s)

Your Answer:

2.3 m 2.3 m
4.6 m 4.6 m
7.8 m 7.8 m
9.2 m 9.2 m

A convex lens of focal length 8 cm is to be used to form a virtual image 2 times the size of the object. Where must the lens be placed?

1 Mark(s)

Your Answer:

3 cm 3 cm
4 cm 4 cm
5 cm 5 cm
8 cm 8 cm

The oxides of beryllium BeO is_______________?

1 Mark(s)

Your Answer:

Acidic Acidic
Basic Basic
Amphoteric Amphoteric
Neutral Neutral

Electric motors works on the principle of:

1 Mark(s)

Your Answer:

capacitors capacitors
friction friction
couple couple
torque torque

The vertical component of velocity at the highest point of a projectile's path is:

1 Mark(s)

Your Answer:

Maximum Maximum
Zero Zero
Equal to initial vertical velocity Equal to initial vertical velocity
Half of initial vertical velocity Half of initial vertical velocity

A uniform chain of length $L$ and mass $M$ is lying on a smooth table and one-third of its length is hanging vertically down over the edge. If $g$ is acceleration due to gravity, the work required to pull the hanging part on to the table is:

1 Mark(s)

Your Answer:

$MgL/6$ $MgL/6$
$MgL/18$ $MgL/18$
$MgL/3$ $MgL/3$
$MgL/9$ $MgL/9$

Number of asymmetric carbons in glucose:

1 Mark(s)

Your Answer:

2 2
3 3
5 5
4 4

Oxidation state +1 for phosphorous is found in___________?

1 Mark(s)

Your Answer:

H3PO3 H3PO3
H3PO4 H3PO4
H3PO2 H3PO2
H2P2O7 H2P2O7

Assertion (A) – is obtained when we divide a whole into seven equal parts and take two part. Reason (R) A fraction is a number representing part of a whole.

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 and 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.

Find the value of $x$ if $2^{x+1} = 32$

1 Mark(s)

Your Answer:

3 3
4 4
5 5
6 6

When sound is incident on the surface of a medium it bounces back into the first medium. The phenomenon is called:

1 Mark(s)

Your Answer:

refraction of sound refraction of sound
deflection of sound deflection of sound
defraction of sound defraction of sound
reflection of sound reflection of sound

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

There are 60 boys and 40 girls in a class. A student is selected at random. Find the probability that the student is a girl.

1 Mark(s)

Your Answer:

A) $\frac{1}{5}$ A) $\frac{1}{5}$
B) $\frac{2}{5}$ B) $\frac{2}{5}$
C) $\frac{3}{5}$ C) $\frac{3}{5}$
D) $\frac{4}{5}$ (\frac{2}{5}\) D) $\frac{4}{5}$ (\frac{2}{5}\)

Nobel gases are present in:

1 Mark(s)

Your Answer:

VIIA group VIIA group
VIA group VIA group
VA group VA group
VIIIA group VIIIA group

Two waves having intensities $I$ and $4I$ interfere. The maximum intensity is:

1 Mark(s)

Your Answer:

$9I$ $9I$
$5I$ $5I$
$3I$ $3I$
$I$ $I$

The equilibrium constant can be used to determine the equilibrium concentration of equilibrium mixture knowing the:

1 Mark(s)

Your Answer:

final concentration of products final concentration of products
final concentration of reactants final concentration of reactants
initial concentration of reactants initial concentration of reactants
initial concentration of products initial concentration of products

A covered wooden box has the inner measure as 115cm 75cm and 35cm and the thickness of wood is 2.5cm. The volume of the wood is____________?

1 Mark(s)

Your Answer:

81000cu.cm 81000cu.cm
81775cu.cm 81775cu.cm
82125cu.cm 82125cu.cm
None of these None of these

A polygon having 6 sides is called:

1 Mark(s)

Your Answer:

nonagon nonagon
heptagon heptagon
hexagon hexagon
quadrilateral quadrilateral

Ncleophilic addition reactions are catalysed__________________?

1 Mark(s)

Your Answer:

Acid Acid
Base Base
Both A and B Both A and B
None None

If there is a total of 104 weekly instalments and a third deposit, find the interest charged

1 Mark(s)

Your Answer:

237.55 237.55
337 337
443 443
334 334

The reaction of C2H5OH with conc. H2SO4 does not give_________?

1 Mark(s)

Your Answer:

Ethene Ethene
Diethyl ether Diethyl ether
Acetylene Acetylene
Ethyl hydrogen sulphate Ethyl hydrogen sulphate

The two F-atoms share one electron in their outermost shell to gain electronic configuration of:

1 Mark(s)

Your Answer:

Xe Xe
Ar Ar
Kr Kr
Ne Ne

The answer of ( -126 ⁄ 14 ) + 2 is:

1 Mark(s)

Your Answer:

−8 −8
8 8
7 7
−7 −7

By solving the inequality 10a < 50, the answer will be:

1 Mark(s)

Your Answer:

a < 5 a < 5
a < 8 a < 8
a < 10 a < 10
a < 50 a < 50

Thermions are________________?

1 Mark(s)

Your Answer:

protons protons
positrons positrons
electrons electrons
photons photons

The acceleration produced in an 8 kg mass when a force acts on a body of 5 kg produces an acceleration of 10 ms-2 is:

1 Mark(s)

Your Answer:

6.25 ms-2 6.25 ms-2
6.25 ms-1 6.25 ms-1
5 ms-2 5 ms-2
4 ms-2 4 ms-2

A wall has two layers A and B of equal area and thickness. $K_A = 3 K_B$. In steady state, temp difference across A is $20^\circ C$. Temp difference across B is:

1 Mark(s)

Your Answer:

$20^\circ C$ $20^\circ C$
$40^\circ C$ $40^\circ C$
$60^\circ C$ $60^\circ C$
$10^\circ C$ $10^\circ C$

Considering the pattern (2 + 2)²⁄2 = 8, (4 + 2)²⁄2 = 18, (6 + 2)²⁄2 = 32, (8 + 2)²⁄2 = 50, (10 + 2)²⁄2 = 72, the 7th line in the pattern will be:

1 Mark(s)

Your Answer:

(14 + 2)²⁄2 = 128 (14 + 2)²⁄2 = 128
(16 + 2)²⁄2 = 162 (16 + 2)²⁄2 = 162
(18 + 2)²⁄2 = 200 (18 + 2)²⁄2 = 200
(12 + 2)²⁄2 = 98 (12 + 2)²⁄2 = 98

Equation of a traveling wave is $y = 10^{-4} \sin(60t + 2x)$. The direction and velocity are:

1 Mark(s)

Your Answer:

Positive x, 30 m/s Positive x, 30 m/s
Negative x, 60 m/s Negative x, 60 m/s
Negative x, 30 m/s Negative x, 30 m/s
Positive x, 2 m/s Positive x, 2 m/s

Moons salary was first increased by 20% and then decreased by 20%. If his present salary is Rs. 7200, then what was his original salary?

1 Mark(s)

Your Answer:

Rs. 8000 Rs. 8000
Rs. 7500 Rs. 7500
Rs. 7400 Rs. 7400
Rs. 7200 Rs. 7200
None of these None of these

The color of the terminal of the galvanometer that shows the positive polarity is:

1 Mark(s)

Your Answer:

red red
blue blue
black black
green green

18 × (12 – 3) is same as

1 Mark(s)

Your Answer:

A) 18 × 12 + 18 × 3 A) 18 × 12 + 18 × 3
B) 18 × 12 × (-3) B) 18 × 12 × (-3)
C) 18 × 12 – 18 × 3 C) 18 × 12 – 18 × 3
D) 18 × 8 D) 18 × 8

The density of 5 lit of water having mass 5 kg is:

1 Mark(s)

Your Answer:

100 kg m-3 100 kg m-3
500 kg m-3 500 kg m-3
750 kg m-3 750 kg m-3
1000 kg m-3 1000 kg m-3

Which phenomenon best supports particle nature?

1 Mark(s)

Your Answer:

Compton effect Compton effect
Interference Interference
Diffraction Diffraction
Polarization Polarization

P, Q and R can complete a work in 24, 6 and 12 days respectively. The work will be completed in________days if all of them are working together.

1 Mark(s)

Your Answer:

2 2
3 3⁄7 3 3⁄7
4 ¼ 4 ¼
5 5

Degrees of freedom for a monoatomic gas molecule is:

1 Mark(s)

Your Answer:

1 1
3 3
5 5
6 6

A passenger in a moving train tosses a coin, which falls behind him. It means that motion

1 Mark(s)

Your Answer:

A) accelerated A) accelerated
B) uniform B) uniform
C) retarted C) retarted
D) along circular tracks D) along circular tracks

The density of 500 g of stone when its volume is 200 cm-3 is:

1 Mark(s)

Your Answer:

2.5 g cm-3 2.5 g cm-3
2.3 g cm-3 2.3 g cm-3
2.5 g cm-2 2.5 g cm-2
2.6 g cm-3 2.6 g cm-3

Evaluating Your Answers

BUET Admission Mock Test 11 : Question 1 of 61