Balbharti Maharashtra State Board Class 8 Science Solutions Chapter 12 Introduction to Acid and Base MCQ
1) Acids present in food stuff are called ?
A ) Carbonic acid B ) Neutral base C ) Alkali
D ) Weak acid
Ans A ) Carbonic acid
2) Proteins in our body cell are made up?
A ) Amino acid
B ) Alkali
C ) Amino acid and alkali
D ) None of the above
Ans A ) Amino acid
3) Alkali has taste.
A ) Bitter B ) Sour C ) Sweet
D ) All of the above
Ans A ) Bitter
4) Litmus paper mainly use to test ?
A ) Ph
B ) Alkali or base
C ) Temperature
D ) None of the above
Ans B ) Alkali or base
5) Orange colour of methyl orange changes to pink in ?
A ) Acid
B ) Base
C ) Neutral
D ) None of the above
Ans A ) Acid
6 ) Which of the following statement is INCORRECT ?
A ) Methyl orange indicator turns yellow in alkali.
B ) Methyl orange indicator turns red in acid.
C ) Phenolphthalein indicator turns pink in alkali.
D ) Phenolphthalein indicator turns yellow in acid.
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Ans D ) Phenolphthalein indicator turns yellow in acid.
7 ) Natural indicators can beamgaaind.e by several indicator.
A ) Domestic B ) Tertiary C ) Primary
D ) None of the above
Ans A ) Domestic
8 ) Hydrochloric acid is used for the preparation of different types of …………… .
A ) Chloride salts B ) Fluoride salts C ) Base
D ) None of the above
Ans A ) Chloride salts
9 ) What do you observe on addition of baking soda solution in fruit juice?
A ) Bubbles formed
B ) No bubbles formed
C ) Gets solidify
D ) No changes
Ans A ) Bubbles formed
10 ) Acids are in nature.
A ) Basic
B ) Netural
C ) Corrosive
D ) Weak acid
Ans C ) Corrosive
11 ) The colour of methyl red in alkali is …………… .
A ) Yellow
B ) Red C ) Pink D ) Green
Ans A ) Yellow
12 ) Lime stone is used to …………… .
A ) To control acidity of soil
B ) To prevent tooth decay
C ) To control stomach acidity
D ) To prevent pain of bee stings and ant bites.
Ans A ) To control acidity of soil
13 ) Which substances doesn’t acquire sour taste?
A ) Lemon
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B ) Tamarind C ) Vinegar D ) Sugar
Ans D ) Sugar
again.
14 ) Metal oxide are generally in nature.
A ) Acidic B ) Alkaline C ) Neutral
D ) None of the above
Ans B ) Alkaline
15 ) What happens to the soil due to excessive use of chemical fertilizers?
A ) Acidity increases B ) Alkalify the soil C ) Neutralized
D ) None of the above
Ans A ) Acidity increases
16 ) Name the indictor which change its colour from red to yellow in alkali solution?
A ) Litmus paper B ) Methyl orange C ) Methyl red
D ) Phenolphthalein
Ans C ) Methyl red
17 ) When turmeric indicator paper is added to washing soap solution, its colour turns to …………… .
A ) Green B ) Red C ) Blue
D ) Orange
Ans B ) Red
18 ) Where does hydrochloric acid is present in our body?
A ) Stomach
B ) Eye
C ) Kidney
D ) All of the above
Ans A ) Stomach
19 ) Which type of solution burns the skin as it decompose the proteins in skin.
A ) Dil. Hcl
B ) Conc. Acid
C ) Conc. Base
D ) All of the above
Ans B ) Conc. Acid
again.
20 ) The colour of hibiscus indicator paper in alkali is …………… .
A ) Red
B ) Pink
C ) Greenish yellow
D ) Orange
Ans C ) Greenish yellow
21 ) Which is not a natural acid ?
A ) Vinegar B ) Tomato C ) Tamarind
D ) Nitric acid
Ans D ) Nitric acid
22 ) Source of citric acid is ?
A ) Tamarind
B ) Lemon and orange
C ) Orange
D ) Lemon
Ans B ) Lemon and orange
23 ) Which of the following is used as antacids ?
A ) Solution of H2CO3 B ) Solution of Ca(OH)2 C ) Solution of Mg(OH)2 D ) Solution of NaOH
Ans C ) Solution of Mg(OH)2
24 ) Dil. HCL is used for of water.
A ) Sterilization B ) Purification C ) Filtration
D ) None of the above
Ans A ) Sterilization
25 ) Acid is such a substance which gives hydrogen ions in state .
A ) Solution
B ) Solid
C ) Gas
D ) None of the above
Ans A ) Solution
26 ) Substances having astringent taste and slippery to tuch are called as?
again.
A ) Acidic B ) Basic C ) Neutral
D ) None of the above
Ans B ) Basic
27 ) What is used for making of white paper from wood pulp ?
A ) Acid
B ) Base
C ) Acid and base
D ) None of the above
Ans A ) Acid
28 ) The dilute solution of which of the following acids is use electric cell ?
A ) Hydrochloric acid
B ) Acetic acid
C ) Nitric acid
D ) Sulphuric acid
Ans D ) Sulphuric acid
29 ) Which of the following bases is used for the production of fertilizers ?
A ) NH4OH
B ) NaOH
C ) Mg(OH)2
D ) Ca(OH)2
Ans A ) NH4OH
30 ) Distilled water is ……………… .
A ) Acidic
B ) Basic
C ) Weak acid
D ) Tasteless
Ans D ) Tasteless
31) Vinegar is the source of ?
A ) Citric acid B ) Lactic acid C ) Oxalic acid D ) Acetic acid
Ans D ) Acetic acid
32 ) What happens when blue litmus paper is dipped into pure water?
A ) The litmus paper remains blue.
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B ) The litmus paper turns red.
C ) The litmus paper turnsagareine.n.
D ) The litmus paper turns yellow.
Ans A ) The litmus paper remains blue.
33 ) Which of the following is NOT a laboratory indicator ?
A ) Phenolphthalein
B ) Methyl red
C ) Litmus paper
D ) Turmeric indicator paper
Ans D ) Turmeric indicator paper
34 ) Natural indicator cannot be prepared by?
A ) Red cabbage
B ) Radish C ) Tomato D ) Potato
Ans D ) Potato
35 ) What is mixed with soil to neutralize its excess acid present in soil?
A ) Lime stone
B ) Water C ) Vinegar D ) Hcl
Ans A ) Lime stone
36 ) Solution of which of the following will turn red litmus paper blue?
A ) H2SO4 B ) HNO3 C ) NH4OH D ) H2CO3
Ans C ) NH4OH
