Basic Science Test 24

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Basic Science Test 24

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Weekly Quiz Competition

Question 1
1 / -0

BOD of waste water is estimated by measuring the amount of:

A
total organic matter

B
biodegradable organic matter

C
oxygen evolution

D
oxygen consumption
Question 2
1 / -0

Which of the following can sometimes be 'zero' for a moving body?
(i) average velocity

(ii) distance travelled

(iii) average speed

(iv) displacement

A
only (i)

B
(i) and (ii)

C
(i) and (iv)

D
only (iv)

Solution

Distance is the length of the actual path covered by a moving body. This implies that the distance travelled by a moving body and also its average speed can never be zero at any point of time. So, option C is correct.
Question 3
1 / -0

Three forces $$F_1 =a(i j+k), F_2 = 2\hat{i} 3j +4k$$ and $$F_3=8i 7j+6k$$ act simultaneously on a particle. If the particle is in equilibrium, the value of $$a$$ is

A
$$10$$

B
$$-10$$

C
$$8$$

D
$$2$$

Solution

$$a= - 10$$
Explanation:
If the body is in equilibrium $$F_1+F_2+F_3=0$$
Substitute and find the value of $$a$$
If $$a = -10$$, then
$$-10i+10j-10k$$
$$2i -3j +4k + 8i -7j +6k$$
Then only $$F_1+F_2+F_3=0$$
Question 4
1 / -0

Which of the following statement is correct regarding velocity and speed of a moving body?

A
Velocity of a moving body is always higher than its
speed

B
Speed of a moving body is always higher than its
velocity

C
Speed of a moving body is its velocity in a given
direction

D
Velocity of a moving body is its speed in a given
direction
Question 5
1 / -0

There is no cell division involved in

A
spermatogenesis

B
oogenesis

C
embryogenesis

D
spermiogenesis
Question 6
1 / -0

The SI unit of measuring momentum of a moving body is

A
ms'

B
kgms

C
kgm

D
kgm's

Solution

kgms should be the answer.
Question 7
1 / -0

The phenomenon by which protoplast of a cell shrinks from the wall is

A
osmosis

B
plasmolysis

C
diffusion

D
glycolysis
Question 8
1 / -0

Which of the following tissues has dead cells?

A
Parenchyma

B
Sclerenchyma

C
Collechyma

D
Epithelial tissue
Question 9
1 / -0

Whenever the surfaces in contact tend to move or move with respect to each other, the force of friction comes into play

A
only if the objects are solid.

B
only if one of the two objects is liquid.

C
only if one of the two objects is gaseous.

D
irrespective of whether the objects are solid, liquid or gaseous.
Question 10
1 / -0

Which of the following situations involves Newtons second law of motion?

A
A force can stop a lighter vehicle as well as a heavier vehicle which are moving

B
A force exerted by a lighter vehicle on collision with a heavier vehicle results in both the (vehicles coming to a standstill

C
A force can accelerate a lighter vehicle more easily than a heavier vehicle which are moving

D
A force exerted by the escaping air from a balloon in the downward direction makes the balloon to go upwards

Solution

c) A force can accelerate a lighter vehicle more easily than a heavier vehicle which are moving.
As $$a=\dfrac{F}{m}$$
When means heavier the mass less is acceleration and lighter the mass more will be the acceleration.

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Re-Attempt Weekly Quiz Competition

Basic Science Test 24

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Basic Science Test 24

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SHARING IS CARING

Question 1

total organic matter

biodegradable organic matter

oxygen evolution

oxygen consumption

Question 2

only (i)

(i) and (ii)

(i) and (iv)

only (iv)

Solution

Question 3

$$10$$

$$-10$$

$$8$$

$$2$$

Solution

Question 4

Velocity of a moving body is always higher than itsspeed

Speed of a moving body is always higher than itsvelocity

Speed of a moving body is its velocity in a givendirection

Velocity of a moving body is its speed in a givendirection

Question 5

spermatogenesis

oogenesis

embryogenesis

spermiogenesis

Question 6

ms'

kgms

kgm

kgm's

Solution

Question 7

osmosis

plasmolysis

diffusion

glycolysis

Question 8

Parenchyma

Sclerenchyma

Collechyma

Epithelial tissue

Question 9

only if the objects are solid.

only if one of the two objects is liquid.

only if one of the two objects is gaseous.

irrespective of whether the objects are solid, liquid or gaseous.

Question 10

A force can stop a lighter vehicle as well as a heavier vehicle which are moving

A force exerted by a lighter vehicle on collision with a heavier vehicle results in both the (vehicles coming to a standstill

A force can accelerate a lighter vehicle more easily than a heavier vehicle which are moving

A force exerted by the escaping air from a balloon in the downward direction makes the balloon to go upwards

Solution

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Velocity of a moving body is always higher than its
speed

Speed of a moving body is always higher than its
velocity

Speed of a moving body is its velocity in a given
direction

Velocity of a moving body is its speed in a given
direction