Q.1. Ammonia is found in many household products, such as window cleaners. It turns red litmus blue. What is its nature?
A. Acidic.
B. Basic.
C. Neutral.
D. Both A and B.
Q.2. Which of the below statement is / are correct?
I. Sodium hydroxide and hydrochloric acid neutralise each other and form salt and water.
II. Sodium hydroxide turns blue litmus red.
III. Indicator is a substance which shows different colours in acidic and basic solutions.
IV. Tooth decay is caused by the presence of a base.
A. I, III and IV.
B. Only I and III.
C. Only III.
D. Only I and IV.
Q.3. Which of the below acid is found in Ant's sting?
A. Acetic acid.
B. Citric acid.
C. Oxalic acid.
D. Formic acid.
Q.4. Litmus is extracted from _______.
A. Fungi.
B. Alage.
C. Lichens.
D. Cucusta.
Q.5. Turmeric stain on a white shirt is turned to red, when it is washed with soap. It is because:
A. Soap solution is acidic.
B. Soap solution is basic.
C. Soap solution is neutral.
D. Soap solution is an indicator.
Q.6. When dilute sulphuric acid is added to lime water, the reaction mixture becomes
A. Hot
B. Cool
C. Remain as it is.
Q.7. Consider the following statements:
I. Both acids and bases change colour of all indicators.
II. If an indicator gives a colour change with an acid, it does not give a change with a base.
III. If an indicator changes colour with a base, it does not change colour with an acid.
IV. Change of colour in an acid and a base depends on the type of the indicator.
Which of these statements are correct?
A. All four
B. I and II.
C. II and III.
D. Only IV.
Q.8. Each cell in our body contains an acid, known as _________.
A. Ribonucleic acid.
B. Deoxyribonucleic acid.
C. Fatty acid.
D. Lactic acid.
Q.9. ________ is found in vinegar and _____ is found in lime water.
A. Ammonium Hydroxide and Formic acid.
B. Formic acid and Calcium Hydroxide.
C. Acetic acid and Ammonium Hydroxide.
D. Acetic acid and Calcium Hydroxide.
Q.10. China rose indicator turns acidic solutions to _____ and basic solutions to ______.
A. Dark pink and Green.
B. Green and Dark pink.
C. Colourless and pink.
D. Pink and colourless.
Q.11. Adding phenolphthalein indicator to an acidic solution change the colour of reaction mixture to _______ whereas adding phenolphthalein indicator to a basic solution change the colour of reaction mixture to ______.
A. Colourless, Pink
B. Magenta, Pink
C. Red, Yellow
D. Yellow, Red
Q.12. An antacid tablet is taken when someone suffer from acidity. It's because
A. Antacid contains base which neutralises the effect of excessive acid.
B. Antacid contains acid which neutralises the effect of excessive base.
C. Antacid contains a neutral solution which neutralises the effect of excessive acid.
D. Antacid contains a neutral solution which neutralises the effect of excessive base.
Q.13. Why Calamine solution is applied on the skin when an ant bites?
A. Calamine solution neutralise the effect of acetic acid injected in skin from ant bites.
B. Calamine solution neutralise the effect of formic acid injected in skin from ant bites.
C. Calamine solution neutralise the effect of oxalic acid injected in skin from ant bites.
D. Calamine solution neutralise the effect of sodium hydrogen carbonate injected in skin from ant bites.
[CTET Prev Year Questions]
Q.14 You have two test tube 'A' and 'B' Test tube 'A' contains paste of turmeric, whereas test tube 'B' contain aqueous solution of phenolphthalein. On adding a few drops of dilute hydrochloric acid to these test tubes the contents of:
A. 'A' would remain yellow, whereas those of 'B' would remain appear pink.
B. 'A' would remain yellow, whereas those of 'B' would remain colourless.
C. 'A' and 'B' both would appear red.
D. 'A' would appear red, whereas those of 'B' would remain colourless.
[CTET Prev Year Questions]
Q.15. You have phenolphthalein solution in three test tube A, B, and C, on putting 2-3 drops of dilute hydrochloric acid in A, a solution hydroxide in B, and distilled water in C, if you immediately observe the colour of the solution in each test tube, you will find that tha solution in test tube.
A. A is colourless, B is pink, C is colourless.
B. A is pink, B is pale green, and C is colourless.
C. A is colourless, B is colourless, and C is pink
D. A is pale green, B is pink, and C is pink
[CTET Prev Year Questions]
Q.16. A student puts a drop of dilute solution of sodium hydroxide first on a blue litmus paper and then on a red litmus paper. He would observe that
A. The blue litmus paper turns red and the red litmus paper turns blue.
B. There is no change in the blue litmus paper and the red litmus paper turns blue.
C. There is no change in the red litmus paper and blue litmus paper turns red.
D. The blue litmus paper turns colourless and there is no change in the red litmus paper.
[CTET Prev Year Questions]
Q.17 A boy has a thick paste of turmeric. On adding this paste to hydrochloric acid and aqueous solution of hydroxide separately, what colour(s) would he obeserve?
A. Yellow in both cases
B. Yellow in hydrochloric acid and red in sodium hydroxide.
C. Pink in hydrochloric acid and blue in sodium hydroxide.
D. Blue in hydrochloric acid and red in sodium hydroxide.
[CTET Prev Year Questions]
Q. 18. The following observations were made by students A, B, C and D when they rubbed solid baking soda on dry litmus paper :
A. Acidic.
B. Basic.
C. Neutral.
D. Both A and B.
Click here for answer
B. Basic.
Q.2. Which of the below statement is / are correct?
I. Sodium hydroxide and hydrochloric acid neutralise each other and form salt and water.
II. Sodium hydroxide turns blue litmus red.
III. Indicator is a substance which shows different colours in acidic and basic solutions.
IV. Tooth decay is caused by the presence of a base.
A. I, III and IV.
B. Only I and III.
C. Only III.
D. Only I and IV.
Click here for answer
B. Only I and III.
Q.3. Which of the below acid is found in Ant's sting?
A. Acetic acid.
B. Citric acid.
C. Oxalic acid.
D. Formic acid.
Click here for answer
D. Formic acid.
Q.4. Litmus is extracted from _______.
A. Fungi.
B. Alage.
C. Lichens.
D. Cucusta.
Click here for answer
C. Lichens.
Q.5. Turmeric stain on a white shirt is turned to red, when it is washed with soap. It is because:
A. Soap solution is acidic.
B. Soap solution is basic.
C. Soap solution is neutral.
D. Soap solution is an indicator.
Click here for answer
B. Soap solution is basic.
Q.6. When dilute sulphuric acid is added to lime water, the reaction mixture becomes
A. Hot
B. Cool
C. Remain as it is.
Click here for answer
A. Hot
Q.7. Consider the following statements:
I. Both acids and bases change colour of all indicators.
II. If an indicator gives a colour change with an acid, it does not give a change with a base.
III. If an indicator changes colour with a base, it does not change colour with an acid.
IV. Change of colour in an acid and a base depends on the type of the indicator.
Which of these statements are correct?
A. All four
B. I and II.
C. II and III.
D. Only IV.
Click here for answer
D. Only IV.
Q.8. Each cell in our body contains an acid, known as _________.
A. Ribonucleic acid.
B. Deoxyribonucleic acid.
C. Fatty acid.
D. Lactic acid.
Click here for answer
B. Deoxyribonucleic acid.
Q.9. ________ is found in vinegar and _____ is found in lime water.
A. Ammonium Hydroxide and Formic acid.
B. Formic acid and Calcium Hydroxide.
C. Acetic acid and Ammonium Hydroxide.
D. Acetic acid and Calcium Hydroxide.
Click here for answer
D. Acetic acid and Calcium Hydroxide.
Q.10. China rose indicator turns acidic solutions to _____ and basic solutions to ______.
A. Dark pink and Green.
B. Green and Dark pink.
C. Colourless and pink.
D. Pink and colourless.
Click here for answer
A. Dark pink and Green.
Q.11. Adding phenolphthalein indicator to an acidic solution change the colour of reaction mixture to _______ whereas adding phenolphthalein indicator to a basic solution change the colour of reaction mixture to ______.
A. Colourless, Pink
B. Magenta, Pink
C. Red, Yellow
D. Yellow, Red
Click here for answer
A. Colourless, Pink
Q.12. An antacid tablet is taken when someone suffer from acidity. It's because
A. Antacid contains base which neutralises the effect of excessive acid.
B. Antacid contains acid which neutralises the effect of excessive base.
C. Antacid contains a neutral solution which neutralises the effect of excessive acid.
D. Antacid contains a neutral solution which neutralises the effect of excessive base.
Click here for answer
Antacid contains base which neutralises the effect of excessive acid.
Q.13. Why Calamine solution is applied on the skin when an ant bites?
A. Calamine solution neutralise the effect of acetic acid injected in skin from ant bites.
B. Calamine solution neutralise the effect of formic acid injected in skin from ant bites.
C. Calamine solution neutralise the effect of oxalic acid injected in skin from ant bites.
D. Calamine solution neutralise the effect of sodium hydrogen carbonate injected in skin from ant bites.
Click here for answer
B. Calamine solution neutralise the effect of formic acid injected in skin from ant bites.
[CTET Prev Year Questions]
Q.14 You have two test tube 'A' and 'B' Test tube 'A' contains paste of turmeric, whereas test tube 'B' contain aqueous solution of phenolphthalein. On adding a few drops of dilute hydrochloric acid to these test tubes the contents of:
A. 'A' would remain yellow, whereas those of 'B' would remain appear pink.
B. 'A' would remain yellow, whereas those of 'B' would remain colourless.
C. 'A' and 'B' both would appear red.
D. 'A' would appear red, whereas those of 'B' would remain colourless.
Click here for answer
B. 'A' would remain yellow, whereas those of 'B' would remain colourless.
[CTET Prev Year Questions]
Q.15. You have phenolphthalein solution in three test tube A, B, and C, on putting 2-3 drops of dilute hydrochloric acid in A, a solution hydroxide in B, and distilled water in C, if you immediately observe the colour of the solution in each test tube, you will find that tha solution in test tube.
A. A is colourless, B is pink, C is colourless.
B. A is pink, B is pale green, and C is colourless.
C. A is colourless, B is colourless, and C is pink
D. A is pale green, B is pink, and C is pink
Click here for answer
A. A is colourless, B is pink, C is colourless
[CTET Prev Year Questions]
Q.16. A student puts a drop of dilute solution of sodium hydroxide first on a blue litmus paper and then on a red litmus paper. He would observe that
A. The blue litmus paper turns red and the red litmus paper turns blue.
B. There is no change in the blue litmus paper and the red litmus paper turns blue.
C. There is no change in the red litmus paper and blue litmus paper turns red.
D. The blue litmus paper turns colourless and there is no change in the red litmus paper.
Click here for answer
B. There is no change in the blue litmus paper and the red litmus paper turns blue.
[CTET Prev Year Questions]
Q.17 A boy has a thick paste of turmeric. On adding this paste to hydrochloric acid and aqueous solution of hydroxide separately, what colour(s) would he obeserve?
A. Yellow in both cases
B. Yellow in hydrochloric acid and red in sodium hydroxide.
C. Pink in hydrochloric acid and blue in sodium hydroxide.
D. Blue in hydrochloric acid and red in sodium hydroxide.
Click here for answer
B. Yellow in hydrochloric acid and red in sodium hydroxide.
[CTET Prev Year Questions]
Q. 18. The following observations were made by students A, B, C and D when they rubbed solid baking soda on dry litmus paper :
Student
|
Effect
on dry red litmus paper
|
Effect
on dry blue litmus paper
|
A
|
Colour changed to
blue
|
No Change
|
B
|
No Change
|
Colour changed to
red
|
C
|
Colour changed to
blue
|
Colour changed to
red
|
D
|
No Change
|
No Change
|
The Correct Observation was made by the student :
I. C II. B III. A IV. D
Click here for answer
IV. D
[CTET Prev Year Questions]
Q.19. When carbon dioxide is passed through clear lime water solution, it turns milky. The milky appearance of lime water is due to
A. Presence of impurities in lime water.
B. Presence of insoluble calcium carbonate.
C. Presence of soluble calcium carbonate.
D. curdling of milk due to lime in lime water.
Click here for answer
C. Presence of soluble calcium carbonate.
[CTET Prev Year Questions]
Q.20. In order to determine acidic, basic or neutral character of solutions, a student tabulated the following result after experimentation. Which of the following observations has been tabulated correctly?
Case
|
Test
Solution
|
Colour
change on red litmus paper
|
Colour
change on blue litmus paper
|
Acidic
/ Basic /Neutral
|
A
|
NaCl
|
No Change
|
Red
|
Acidic
|
B
|
Lime Water
|
Blue
|
No Change
|
Neutral
|
C
|
Vinegar
|
No Change
|
No Change
|
Neutral
|
D
|
Washing Soda
|
Blue
|
No Change
|
Basic
|
I. A II. B III. C IV. D
Click here for answer
IV. D
[CTET Prev Year Questions]
Q.21. Metallic oxides are ________ in nature.
A. Neutral
B. Basic
C. Acidic.
D. Amphoteric.
Click here for answer
B. Basic
[CTET Prev Year Questions]
Q22. Which of the following is present in the acid rain?
A. Sulphurous acid.
B. Nitrous acid.
C. Carbonic acid.
D. Carboxylic acid.
Click here for answer
C. Carbonic acid.
[CTET Prev Year Questions]
Q.23. Aqueous solution of which of the following oxide will change the colour of blue litmus to red?
A. Copper oxide.
B. Iron oxide.
C. Magnesium oxide.
D. Sulphur dioxide.
Click here for answer
D. Sulphur dioxide.
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