Why are diamonds used in jewellery? give reasons

Why are dnger signals red in colour?Give reason.

Diamond and Graphite are two allotropic forms of carbon. Both are covalent solids. These two froms have different structures and hence differ in physical properties. Both have their own importance in being used in everyday life. Diamond is popularly used in jewellery and graphite is extensively used as electrodes in many industrial processes. Answer the following questions Which of the allotropes is a good conductor of electricity.

Of what property, are metals used in jewellery?

Why does a diamond sparkle?

Why does a diamond sparkle?

Why do all electrons emitted during beta decay not have the same energy? give reasons.

Why mosses/ferns are so few? Give reason.

Plasmids are suitable for use as vehicle DNA. Give reasons.

Indiscriminate use of X-rays for diagnoses should be avoided. Give reasons.

Why are vitamins essential to us ? Give the roles of various vitamins in our body.