Chapter 2- Symbols, formulas and chemical equations

Question 1

Is the way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound or molecule, using chemical element symbols, numbers, and sometimes also other symbols, such as parentheses, dashes, brackets, commas and plus and minus signs.

Answer 1

Chemical formula

Question 2

It is list the actual total no. of atoms present in a compound.

Answer 2

Molecular formula

Question 3

A formula giving the proportions or ratios of the elements present in a compound but not the actual numbers or arrangement of atoms.

Answer 3

Empirical formula

Question 4

It gives the graphic representation of how atoms are arranged in a molecule or compound.

Answer 4

Structural Formula

Question 5

A process by which one or more chemical substances are converted into one or more different substances.

Answer 5

Chemical reaction

Question 6

A symbolic representation of a chemical reaction in the form of symbols and formula.

Answer 6

Chemical Equations

Question 7

Reactions in which energy is absorbed as heat.

Answer 7

Endothermic reaction

Question 8

Reactions in which energy is evolved as heat.

Answer 8

Exothermic reactions-