21645.Which one of the following is not true at room temperature andpressure
P4O10 is a white solid
SO2 is a coloureless gas
SO3 is a colourless gas
NO2 is a brown gas
21646.The tendency of BF3, BCl3 and BBr3 to behave as Lewis acid decreases in the sequence:
BCl3 > BF3 > BBr3
BF3 > BCl3 > BBr3
BBr3 > BF3 > BCl3
BBR3 > BCl3 > BF3
21647.Which statement is NOT correct about fullerene C60?
It contains 20 six membered rings and 12 five membered rings
All carbon atoms undergo sp2 hybridization
A six membered ring is fused with six membered rings only
A five membered ring is fused with six membered ring only