Combustion and Flame — Science STD 8 — Question

Asteroids revolve around the Sun between the orbits of the planets:

The element whose oxide will turn red litmus solution to blue will be:

The electric nature of lightning was established by a scientist named:

Which force among the following is a contact force:

If the clothes of a person working in the kitchen catch fire, then to extinguish the fire:

Cords of electrical appliances and cables have a plastic coating because plastics are:

Which of the following contents is most harmful to aquatic animals?

Assertion (A): When electric current flows through a conductor (like a wire), it produces a magnetic field around it. This phenomenon is known as the magnetic effect of electric current.
Reason (R): The magnetic field around a current-carrying conductor can be shown by the deflection of a compass brought near the conductor.

Which among the following is the most reactive metal?

Production of thyroxin requires: