Reproduction in animals — Science STD 8 — Question

Which effect of electric current is utilized when a thin layer of chromium metal is deposited on an iron tap? What is this process known as?

Name any two antibiotics.

Name the non-metal used to make purple coloured solution which is applied on cuts and wounds as an antiseptic.

Name one ‘single cell’ which behaves like a complete organism.

Name two metals which are used to make jewellery.

Name the biggest cell?

A car is moving towards North. What will be the direction of force of friction acting on this car due to surface of road?

A rocket has been fired upwards to launch a satellite in its orbit. Name the two forces acting on the rocket immediately after leaving the launching pad (Ignore the frictional force due to air resistance).

Define 'frequency' of a vibrating object. Name the unit in which frequency is measured.

Name the insect which is the carrier of parasite of malaria.