CBSE - VIII
Question 1
Two cylindrical containers with different base areas are filled with equal volumes of water. The pressure at the base of the containers is same for both of them.
A) True
B) False
Question 2
A box kept on a rough surface is pressed from the top. While moving the box, we observe that the friction between the box and the surface ____.
A) increases
B) decreases
C) remains the same
D) becomes zero
Question 3
In the sitar, the player plucks a string with the right hand, while the pitch of the sound produced is changed by pressing the string with the index finger of the left hand.
A) True
B) False
Question 4
Which of the following metals is electroplated on objects such as car parts, bicycle handles, wheel rims, etc.?
A) Iron
B) Aluminum
C) Zinc
D) Chromium
Question 5
Petroleum is formed at the bottom of the sea in the absence of air under ____.
A) high temperature and high pressure
B) high temperature and low pressure
C) low temperature and low pressure
D) low temperature and high pressure
Question 6
Calorific value of a fuel may be defined as the amount of heat produced in kilojoule when 1 kg of a fuel is completely burnt.
A) True
B) False
Question 7
Which is the way to minimise air pollution caused by the use of petrol and diesel in Internal Combustion engines?
A) Sufficient supply of air and catalytic converter
B) Insufficient supply of air
C) Use of leaded petrol
D) Use of nickel catalyst
Question 8
Which of the following carries parasites of the dengue fever?
A) Female Anopheles mosquito
B) Male Anopheles mosquito
C) Female Aedes mosquito
D) Male Aedes mosquito
Question 9
Which among the following cells transfer and receive messages?
A) Muscle cell
B) Red blood cell
C) Nerve cell
D) White blood cell
Question 10
Which of the following hormones is responsible for the development of a moustache in males?
A) Testosterone
B) Estrogen
C) Progesterone
D) Adrenalin