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MOST IMPORTANT general science mcq - 16 EXERCISES
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The following question based on light, heat, thermodynamics, wave motion, sound, optics & oscillations topic of general science mcq
- They can destroy insects.
- They can clean clothes by removing dust.
- They can be used to treat diseases.
- They can control automatic doors.
(a) 3 and 4 are correct
(b) 1, 2 and 3 are correct
(c) 1 and 2 are correct
(d) All are correct
The correct answers to the above question in:
Answer: (d)
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Read more light heat thermodynamics wave sound optics oscillation Based General Science Questions and Answers
Question : 1
Consider the following statements.
- The sky appears blue because of less scattering.
- The main cause of seven colours of the rainbow is scattering of light.
- At the time of Sunrise, the Sun appears red, due to scattering of light.
a) Only 2 is true
b) 1 and 3 are true
c) Only 1 is true
d) 2 and 3 are true
Answer »Answer: (b)
Question : 2
Consider the following statements.
- If a person looks at a coin which is in a bucket of water, the coin will appear to be closer than it really is.
- If a person underwater looks at a coin above the water surface, the coin will appear to be at a higher level than it really is.
a) Only 2
b) Only 1
c) 1 and 2
d) Neither 1 nor 2
Answer »Answer: (c)
Question : 3
Assertion (A):
Steam is more harmful for human body than the boiling water in case of burn.
Reason (R) :
Boiling water contains more heat than steam.
a) Both A and R are true, but R is not the correct explanation of A
b) Both A and R are true and R is the correct explanation of A
c) A is true, but R is false
d) A is false, but R is true
Answer »Answer: (c)
Question : 4
In the visible spectrum the colour having the shortest wavelength is
a) violet
b) green
c) red
d) blue
Answer »Answer: (a)
Question : 5
Which one of the following statement is not true for a person suffering from hypermetropia?
a) The image of the close objects is focused behind the retina
b) The focal length of the lens is large
c) The person can see far objects distinctly
d) A concave lens is used to correct this defect
Answer »Answer: (d)
Question : 6
Which one of the following changes occurs when salt is added into the water?
a) Boiling point is decreased and freezing point is increased
b) Both boiling point and freezing point are decreased
c) Boiling point is increased and freezing point is decreased
d) Both boiling point and freezing point are increased
Answer »Answer: (c)
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