Question

1. Divide: (i) -39pqʻrby – 24 pºqer​

Answer 1

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• In the proper motion of Barnard's Star, with a period of about 24 years, using ... The extracted stellar and comparison exposures were then divided ... IXſ ّų3 ءq pºpunoq xnŲ pºqer؛؛nuſ Ieņo L,..

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Hope it's helpful to you ☺️❣️

Answer 2

Both A and B

In general, ionic bond is a non directional bond and covalent bond is a directional bond.

The meaning of covalent bonds being directional is that atoms bonded covalently prefer specific orientations in space relative to one another.

⇒KF has a non directional bond (Ionic bond)

⇒Even though, H

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has a covalent bond, it is still non directional as the molecule is linear and there is no difference of electronegativity. There is no specific orientation of H with respect to other H.

⇒H

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O has a directional bond.

∴ Both KF & H

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have non directional bond present in them.