Acids, Bases and Salts — CHEMISTRY STD 7 — Question

Statement are incorrect. write the correct statement:
Kerosene oil is separated from the mixture of kerosene oil and water by the process of distillation.

Statement are incorrect. write the correct statement:
A balanced chemical equation consists of formulae of reactants connected by a (+) plus sign and is equal to (=) followed by the formulae of products, connected by (+) plus sign.

Define the terms.
Valency

Name the following :
The ion consisting of a group of atoms with an overall charge

Name the following :
The smallest indivisible particle of an element

Name the following.
A gas used in hospitals for preserving blood, tissues, etc.

Statement are incorrect. write the correct statement:
The formula of an oxide of aluminum is Al3O2.

Name the following :
A force of attraction that holds the atoms of a compound together

Name the following :
Chemical substances that provide essential nutrients to plants for their growth.