Which is / are correct statement ?...

Which is / are correct statement ?

In simple cubic close packed arrangement no octahedral void is present at edge centre.

In fcc unit cell octaherdral void and tetrahedral void are vacant .

Packing fraction : simple cubic cell `lt` bcc unit cell `lt ` fcc unit cell.

Size of void : cubic `gt` octachedral void ` gt` trtrahedral void.

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The correct Answer is:

A, B, C, D

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Which are correct statement ?

With increase in temperature pH of water decreases

With increase in temperature degree of dissociation of water increase

pH of `CH_3 COOH` increase on dilution

pH of `NH_(3(aq)) ` decrease on dilution

Reverse osmosis is used desalination of sea water

Vant Hoff's factor decreases upon dilution

Osmotic pressure associated with the fluid inside the blood cell is equivalent to that of `0.9%` (w//v) NaCl solution

Units of `K_(f) and K_(b)` are same and it is K `"Kgmol"^(-1)`

Phosphinic acid is a monoprotic acid while Posphonic acid is a diprotic acid.

Phosphinic acid is a diprotic acid while Posphonic acid is a monoprotic acid.

Both are diprotic acids

Both are triprotic acids