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Chemistry Quiz on “ACIDS AND BASES ” Based on NCERT for SSC 2016

Chemistry Quiz on "ACIDS AND BASES " Based on NCERT for SSC 2016_40.1
1. Which of the following acid is used in soft drinks?
A. Ascorbic acid (vitamin C)
B. Carbonic acid (H2CO3)
C. Hydrochloric acid (HCl)
D. Citric acid

2. Which of the following is present in Tomato?
A. Malic acid
B. Citric acid
C. Nitric acid (HNO3)
D. Both (A) & (B)
3. Which of the following is the milk of magnesia?
A. Ammonium hydroxide (NH4OH)
B. Sodium hydroxide (NaOH)
C. Magnesium hydroxide (Mg(OH)2)
D. Potassium hydroxide (KOH)
Ans. C
Magnesium hydroxide (Mg(OH)2) or milk of magnesia used to control acidity.
4. Which acid is present in sour milk?
A. Ascorbic acid
B. Ethanoic acid
C. Tartaric acid
D. Lactic acid
5. When acids are dissolved in water they produce ions which help in conducting the electricity. This process is known as—
A.  Galvanization
B.  Vulcanisation
C.  Dissociation
D. None of the above
6. Which of the following do not conduct electricity?
A. Ethyl alcohol
B. glucose
C. water
D. Both (A) & (B)
Ans. D
Ethyl alcohol (C2H5OH) and glucose (C6H12O6) contain hydrogen but do not produce H+ ion on dissolving in water. Their solutions do not conduct electricity and are not acidic.
7. What is the pH of acid rain?
A. Above 7
B. Below 5.6
C. Above 5.6
D. None of the above
Ans. B
When the pH of rain water falls below 5.6, it is called acid rain. When acid rain flows into rivers, the pH of the river water also falls and it become acidic. As a result, the survival of aquatic life become difficult.
8. Which of the following is usually taken to get rid of acidity?
A. Hydrochloric acid
B. Milk of magnesia
C. Ascorbic acid
D. None of the above
Ans. B
Our stomach produce hydrochloric acid which helps in digestion of food. When we eat spicy food, stomach produces too much of acid which causes ‘acidity’ i.e. irritation and sometimes pain too. To get rid of this we use ‘antacids’ which are bases like ‘milk of magnesia’ (suspension of magnesium hydroxide in water).
9. Which of the following is present in Bee sting?
A. Tartaric acid
B. Methanoic acid
C. Citric acid
D. Lactic acid
Ans. B
Bee sting causes severe pain and burning sensation. It is due to the presence of methanoic acid in it. Use of a mild base like baking soda can provides relief from pain.
10. Tooth enamel is made up of which of the following?
A. Potassium carbonate
B. Calcium carbonate
C. Calcium phosphate
D. None of the above
Ans. C

Tooth enamel is made of calcium phosphate which is the hardest substance in our body and can withstand the effect of various food articles that we eat.  

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