Valence angle `(alpha)` in `HF` liquid state is
`120.1^(o)`
`100^(o)`
`140^(o)`
`180^(o)`

cos120^o=

In Figure, A P B is a tangent to a circle with centre O at point P . If /_Q P B=50^@ , then the measure of /_P O Q is (a) 100^@ (b) 120^@ (c) 140^@ (d) 150^@

If the area of a sector of a circle is 7/(20) of the area of the circle, then the sector angle is equal to (a) 110o (b) 130o (c) 100o (d) 126o

The valency of iron in Fe_2O_3 is

Th C-O-O bond angle in the ether molecule is

O-O-H bond angle in H_2O_2 is approximately______.

O -N -O bond angle is maximum in :

NO_(2) and N_(2)O_(4) are two forms of nitrogen dioxide. One exists in gaseous state while other in liquid state. The nature of NO_(2) and N_(2)O_(4) forms are

In Fig.105, If A O B and C O D are straight lines. Then x+y= (a) 120 (b) 140 (c) 100 (d) 160

The H - O - O bond angle in H_(2)O_(2) (g) is