Give reason for the following in one or two sentences : ''Solid carbon dioxide is known as dry ice.''

Why is solid carbon dioxide known as dry ice ?

Give reasons for following in one or two sentences: CrO_3 is an acid anhydride?

Solid carbon dioxide is an example of

Give reasons for the following in one or two sentences only : ''BeCl_(2) can be easily hydrolysed.

Given reasons for the following in one or two sentences: silver bromide is used in photography?

Give reasons for the following in one or two sentences : 'Graphite is used as a solid lubricant.''

Give reasons for the following in one or two sentences: "Dimethyl amine is a stronger base than trimethyl amine" in H_2 O .