[ Question Bank ] - 2022 — Science STD 10 — Question

Which of the following metals react with cold water?
Sodium, iron, copper, potassium.

The family of metals having valency two.

Name two common antacids.

Which mirror always produces a virtual, erect and diminished image of an object?

Two non-metals combine with by the sharing of electrons to form a compound X.
State whether X will have a high melting point or low melting point.

…….. is the distance between the nucleus of the atom and its outermost shell.

Which causes more bending (or more refraction) of light rays passing through it:
a convex lens of long focal length or a convex lens of short focal length?

Which mirror has a wider field of view?

Pre-disaster management and Post-disaster management.

State three reasons (of which at least one must be chemical) for believing that sulphur is a non-metal.