Question

Rehber CHAPTER & TOPIC WISE CHEMISTRY (9th)
2.
پینے کے عمل کو Why shielding effect of
electrons makes cation
formation easy?
The greater the shielding effect g byl
Ans:
be the​

Answer 1

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The power of a lens is defined as the reciprocal of the focal length. Lens power is measured in dioptres (D). Converging (convex ) lenses have positive focal lengths, so they also have positive power values. Diverging (concave ) lenses have negative focal lengths, so they also have negative power values.

I DIDN'T UNDERSTAND UR QUESTION

Answer 2

Explanation:

The words that match with latitude are: parallel lines and horizontal lines. The word that matches with longitude is vertical lines.