MCQ-1 Which among the following gases does not help in the depletion of ozone in the ozone layer?
A) NO
B) NO2
C) CFC
D) CO2
Answer
D) CO2
MCQ-2 Which among the following substances has the highest heat conductivity?
A) Silver
B) Diamond
C) Copper
D) Aluminium
Answer
B) Diamond
MCQ-3 Let violet and red light has same incident angle on prism and r and v are the angle of refraction from the prism respectively. Which relation among the following is correct?
A) r = v
B) r > v
C) r < v
D) r = 1/v
Answer
r < v
MCQ-4 Coulomb’s law is applicable when of the two charges
A) one is point, one is spherical
B) both are spherical
C) one is point, one is extended
D) both are points
Answer
D) both are points
MCQ-5 The characteristics of a fuse wire are
A) high resistance, high melting point
B) low resistance, low melting point
C) low resistance, high melting point
D) high resistance, low melting point
Answer
high resistance, and low melting point.
MCQ-6 Present in alpha particle
A) one proton, one neutron
B) one proton
C) two proton, two neutron
D) one electron
Answer
C) two proton, two neutron
MCQ-7 Which of the following is not a periodic property of elements?
A) density
B) boiling point
C) melting point
D) radioactivity
Answer
D) radioactivity
MCQ-8 Choose whether the following statement is true or false:
StateMent: Among copper, invar and iron the linear expansion coefficient of iron is the lowest.
A) True
B) False
Answer
False: invar has the lowest expansion coefficient
MCQ-9 Which kind of nuclear reaction produces energy in a nuclear reactor?
A) Fission
B) Fusion
C) Both
D) None
Answer
A) Fission
MCQ-10 Where in the front of a concave mirror image of an extended object placed at infinity will be formed by the mirror?
A) at focus
B) between focus and pole
C) at double the focus
D) at infinity
Answer
A) at focus
INFO: Multiple Choice Question answer for competitive exams. These objective questions with answers are important for West Bengal class 10 madhyamik or secondary board exam.