Calcium phosphate is present in tooth enamel. Its nature is
basic
acidic
neutral
amphoteric
The pH of the gastric juices released during digestion is
less than 7
more than 7
equal to 7
equal to 0
Which of the following is acidic in nature?
Lime juice
Human blood
Lime water
Antacid
The reaction between an acid and a base is known as _______________ reaction.
Neutralisation
Addition
Substitution
Combustion
The acid found in vinegar is
Acetic acid
Ascorbic acid
Citric acid
Lactic acid
The acid present in ant's sting is
Formic acid
A solution reacts with crushed egg- shell to give a gas that turns lime water milky. The solution contains
Nacl
HCl
LiCl
KCl
Which of the following salts does not contain water of crystallization?
Blue vitriol
Baking soda
Washing soda
Gypsum
Which among the following is not a base?
NaOH
KOH
NH4OH
C2H5OH
A solution turns red litmus blue, its pH is likely to be
1
4
5
10