Give one evidence to show that viruses are smaller than bacteria.

Who showed that viruses are smaller than bacteria?

Give examples to show that : AB=BA

Give one use of CIF_3

Give one use of esters.

Give one use of solar cell.

Who first showed that viruses could be crystallised?

Give one chemical reaction to show that all the bonds in PCI_5 molecules are not equivalent?

We wish to obtain an erect image of an object, using a concave mirror of focal length 15cm. What should be the range of distance of the object from the mirror? What is the nature of the image? Is the image larger or smaller than the object? Draw a ray diagram to show the image formation in this case.

Give one example of ionisation isomers.