10 th Science important question 2021 for board exam

Hi,

I hope you are doing well.

Here are some important questions for 10th science:

Q Explain why a ray of light passing through the centre of curvature of concave minor gets reflected along the same path.

Q. Dark reaction of photosynthesis does not need light. Do plants undergo dark reaction at night? Explain.

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) CH ₃ CH ₂ CH ₂ OH
(ii) CH ₃ COOH

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?

Q. (a) What are ‘magnetic field lines’? How is the direction of a magnetic field at a point determined ?

(b) Draw two field lines around a bar magnet along its length on its two sides and mark the field directions on them by arrow marks.