Kerala (English Medium) Std 9 Study Materials, Online Learning, Question Papers, Classnotes, Practice Test, MCQ | Smartindia Educational Program : www.smartindia.net.in

Question-1
The acid found in vinegar is

(A) Acetic acid	(B) Ascorbic acid
(C) Citric acid	(D) Lactic acid

Question-2
Which of the following phenomena occur when a small amount of acid is added to water?
Ionization, Neutralisation, Dilution, Salt formation

(A) Ionization and Neutralisation,	(B) Ionization and Dilution
(C) Dilution and Neutralisation	(D) Dilution and Salt formation

Question-3
Which among the following is not a base?

(A) NaOH	(B) KOH
(C) NH₄OH	(D) C₂H₅OH

Question-4
An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change.

(A) Baking power	(B) Lime
(C) Ammonium hydroxide solution	(D) Hydrochloric acid

Question-5
Calcium phosphate is present in tooth enamel. Its nature is

(A) basic	(B) acidic
(C) neutral	(D) amphoteric

Question-6
Oxalic acid is found in

(A) Curd	(B) Spinach
(C) Amla	(D) Onion

Question-7
Which of the following gives the correct increasing order of acid strength?

(A) Water< acetic acid < hydrochloric acid	(B) Water < hydrochloric acid < acetic acid
(C) Acetic acid < Water < hydrochloric acid	(D) hydrochloric acid < Water < Acetic acid

Question-8
The pH of the gastric juices released during digestion is

(A) less than 7	(B) more than 7
(C) equal to 7	(D) equal to 0

Question-9
The solutions which do not change the colour of either red or blue litmus are known as

(A) Basic	(B) Acidic
(C) Neutral	(D) Indicator

Question-10
The acid present in ant's sting is

(A) Citric acid	(B) Acetic acid
(C) Lactic acid	(D) Formic acid

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Std 9

Kerala (English Medium)

Practice in Related Chapters
The World of Carbon
Some non-metals in nature
Metals
Chemistry In Daily Life
Chemical Bonding
Separation of Mixtures
Nature of Materials
Acids and Alkalies
Structure of Atom