Which one of the following can be used as an acid- base indicator by visually impaired student?
Litmus
Turmeric
Vanilla essence
Petunia leaves
The turmeric stain on a white shirt is turned to ----------when it is washed with soap.
blue
Red
Green
Yellow
____________ is known as baking soda.
Sodium hydrogen carbonate
Sodium carbonate
Sodium hydroxide
Potassium hydroxide
The acid present in ant's sting is
Citric acid
Acetic acid
Lactic acid
Formic acid
Which of the following is acidic in nature?
Lime juice
Human blood
Lime water
Antacid
Which of the following salts does not contain water of crystallization?
Blue vitriol
Baking soda
Washing soda
Gypsum
A solution reacts with crushed egg- shell to give a gas that turns lime water milky. The solution contains
Nacl
HCl
LiCl
KCl
The pH of the gastric juices released during digestion is
less than 7
more than 7
equal to 7
equal to 0
The reaction between an acid and a base is known as _______________ reaction.
Neutralisation
Addition
Substitution
Combustion
Which of the following statement is not correct.
All metal carbonates react with acid to give a salt, water and carbon dioxide.
all metal oxides react with water to give salt and acid
Some metals reacts with acids to give salt and hydrogen
Some non- metal oxides react with water to form an acid
