Science important question 2020paper
Answers
Answer:
Q. Explain why a ray of light passing through the centre of curvature of concave minor gets reflected along the same path.
Q. What is the important function of presence of ozone in earth’s atmosphere?
Q. Dark reaction of photosynthesis does not need light. Do plants undergo dark reaction at night? Explain.
Q. How are we able to see distant and nearby objects clearly? Which part of eye helps in changing curvature of lens? Why no image is formed at blind spot?
Q. (a) Which property of carbon leads to formation of large number of compounds? Define it.
(b) What is the functional group in the following molecules?
(i) CH3CH2CH2OH
(ii) CH3COOH
Q. (a) Why magnification is taken negative for real images and positive for virtual images?
(b) Why convex mirror is used in rear view mirrors and not concave mirror?
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Answer:
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Explanation:
Q. Explain why a ray of light passing through the centre of curvature of concave minor gets reflected along the same path.
Q. What is the important function of presence of ozone in earth’s atmosphere?
Q. Dark reaction of photosynthesis does not need light. Do plants undergo dark reaction at night? Explain.
Q. How are we able to see distant and nearby objects clearly? Which part of eye helps in changing curvature of lens? Why no image is formed at blind spot?
Q. (a) Which property of carbon leads to formation of large number of compounds? Define it.
(b) What is the functional group in the following molecules?
(i) CH3CH2CH2OH
(ii) CH3COOH
Q. (a) Why magnification is taken negative for real images and positive for virtual images?
(b) Why convex mirror is used in rear view mirrors and not concave mirror?
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