Metals and Non-Metals — Science STD 10 — Question

What is the other name of carpel of a flower?

When an electric current is passed through any wire, a magnetic field is produced around it. Then why an electric iron connecting cable does not attract nearby iron objects when electric current is switched on through it?

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

What elements are present in steel? How are the properties of steel different from those of pure iron?

State whether the following statement is true or false:The image formed on our retina is upside-down.

Name the scientific terms used to represent the following:
The branch of biology which studies heredity and variation.

What do we call those particles which have less electrons than the normal atoms?

An element ‘B’ belongs to the second period and Group 13. Give the formula of its oxide.

Which of the following compounds are ionic and which are covalent?
Urea, Cane sugar, Hydrogen chloride, Sodium chloride, Ammonium chloride, Carbon tetrachloride, Ammonia, Alcohol, Magnesium chloride.

Arrange the following elements according to the instructions written in paranthesis.
Cu, Mn, Ge, Sc (increasing atomic size).