metals and non-metals — Science STD 10 — Question

Two solutions have pH value of 5 and 9 respectively. Which solution will be more basic in nature? Why?

How does the current in a foma domestic circuit differ from that used to run a clock?

What is dispersion of white light?

Define the terms : Respiration

Give an example of a plant hormone that promotes growth.

A person got his eyes tested by an optician. The prescription for the spectacle lenses to be made reads:
Right eye: +2.00 D, Left eye: +2.50 D
(a) State whether these lenses are thicker in the middle or at the edges.
(b) State whether these spectacle lenses will converge light rays or diverge light rays.

Name the elements which have the smallest and the largest atoms.

Definitions of cornea.

Preksha needs a lens of power2.0 D for correcting her defect of vision
(i) Which type of defect does she have?
(ii) Which type of lens does she use for correcting her vision?
(iii) Give scientific reason for generation of this defect into her eye.

A current of 0.5 A is drawn by a filament of an electric butb for 10 minutes. Find the amount of electric charge that flows through the circuit.