Chemistry Review

Question 1

What is a covalent bond?

Answer 1

A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms.

Question 2

How many bonds can one carbon form?

Answer 2

four bonds

Question 3

how do water molecules bind together?

Answer 3

In the case of water, hydrogen bonds form between neighboring hydrogen and oxygen atoms of adjacent water molecules. The attraction between individual water molecules creates a bond known as a hydrogen bond.

Question 4

Acidic Substances

Answer 4

An acid is any substance that in water solution tastes sour, changes blue litmus paper to red, reacts with some metals to liberate hydrogen, reacts with bases to form salts, and promotes chemical reactions (acid catalysis).

Question 5

basic substances

Answer 5

Basic substances include things like baking soda, soap, and bleach. Distilled water is a neutral substance.

Question 6

pH scale

Answer 6

The pH scale, which measures from 0 to 14, provides an indication of just how acidic or basic a substance is.

Question 7

neutral substances

Answer 7

The substances which do not show any colour change with litmus paper are called neutral substances.
These substances are neither acidic nor basic.
For example, salt, ammonium chloride, calcium chloride, sodium carbonates, sodium bicarbonates etc.

Question 8

monomers of carbohydrates

Answer 8

simple sugars, monosaccharides

Question 9

monomers of lipids

Answer 9

fatty acids and glycerol

Question 10

monomers of proteins

Answer 10

amino acids