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Chemistry - 9 Chapter - 9
Acids, Bases and Salts
Test - 1
1.
Define acid?
a) Acid is a corrosive (able to destroy something) liquid with a sour taste compound, which is usually water-soluble and turns blue litmus red
b) Acid is a corrosive (able to destroy something) liquid with a sour taste compound, which is usually water-soluble and turns blue litmus blue
2.
What is alkali?
a) Alkali a chemical substance that is soluble in water, neutralizes acids, forms salts with them and turns red litmus paper green.
b) Alkali a chemical substance that is soluble in water, neutralizes acids, forms salts with them and turns red litmus paper blue.
3.
What is a base?
a) Base is a non chemical compound that reacts with acids to form salts. It can form a covalent bond with an acid.
b) Base is a chemical compound that reacts with acids to form salts. It can form a covalent bond with an acid.
4.
What all was prepared by Jabar Bin Haiyan?
a) Nitric acid (HNO
3
), Hydrochloric Acid (HCl) and Sulphuric Acid (H
2
SO
2
)
b) Nitric acid (HNO
3
), Hydrochloric Acid (HCl) and Sulphuric Acid (H
2
SO
4
)
5.
Who named such oxygen containing binary compounds, which gave acidic solution in water, as acids?
a) Lavoisier
b) Jabar Bin Haiyan
c) Sir Himpharay Davy
d) Prof. G N Lewis
6.
Who discovered in 1815 that some acids are free from oxygen, e. g. HCl?
a) Sir Hinphy Davy
b) Jabar Bin Haiyan
c) Lavoisier
d) Prof. G N Lewis
7.
Who suggested that the acidic character of acids is due to the presence of hydrogen atoms in it.
a) Lavoisier
b) Jabar Bin Haiyan
c) Prof. G N Lewis
d) Sir Himphary Davy
8.
What is an oxide?
a) Oxide is any compound containing oxygen, especially in combination with a metal.
b) Oxide is any compound containing oxygen, especially in combination with a non metal.
9.
Metallic oxides turn ------- litmus ------- which is a property of a base.
a) Green, Blue
b) Green, Red
c) Blue, Red
d) Red, Blue
10.
Non-metallic oxides turn ------ litmus -------, which is the property of an acid.
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a) Blue, Red
b) Green, Blue
c) Red, Blue
d) Green, Red
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