Friday, August 16, 2013

CBSE Class 7 - Science - CH5 Acids, Bases and Salts (MCQs)

Acids, Bases and Salts 

CBSE Class 7 - Science - CH5 Acids, Bases and Salts (MCQs)
(MCQs)

Q1: The word acid comes from the Latin word 'acere'  which means
(a) Sweet
(b) Salty
(c) Sour
(d) Neutral


Q2: Which of the following is used in match industry.
(a) Sodium chloride
(b) Sodium bicarbonate
(c) Sodium carbonate
(d) Potassium chlorate


Q3: Acids turns blue litmus to ______
(a) green
(b) yellow
(c) red
(d) black



Q4: Substances which are bitter in taste, feel soapy on touching are known as
(a) Acids
(b) Bases
(c) Indicators
(d) Neutral solution


Q5: Special type of substances used to test whether a substance is acidic/basic are known as
(a) Indicators
(b) Acids
(c) Bases
(d) Salt


Q6: Which of the following is a strong acid?

(a) acetic acid
(b) nitric acid
(c) lactic acid
(d) citric acid


Q7: The most commonly used natural indicator’ Litmus’ is extracted from
(a) Lichens
(b) Turmeric
(c) Beet Root
(d) China rose


Q8: Which of the following colours is given by phenolphthalein in a basic salt solution.
(a) yellow
(b) pink
(c) orange red
(d) colourless


Q9: Acetic acid is found in
(a) Curd
(b) Spinach
(c) Vinegar
(d) Citrus fruits



Q10: Lactic acid is found in
(a) Curd
(b) Soap
(c) Apple
(d) Lime


Q11: Sodium hydroxide is found in
(a) Lemon
(b) Soap
(c) Oil of Vitriol
(d) Table Salt


Q12:  Chemical name of Oil of Vitriol is __________

(a) Nitric acid
(b) Acetic acid
(c) Sulphuric acid
(d) Sodium Hydroxide



Answers:
1: (c) Sour
2: (d) Potassium chlorate
3: (c) red 
4: (b) Bases
5: (a) Indicators
6: (b) nitric acid
7: (a) Lichens
8: (b) pink
9: (c) Vinegar
10: (a) Curd
11: (b) Soap
12: (c) Sulphuric acid

5 comments:

  1. oh...fantastic.this is very easy to learn me all the subjects

    ReplyDelete
  2. it is very easy to prepare for olympiads with the help of the given questions

    ReplyDelete
    Replies
    1. you are wrong,shreya. it is madness. And you are caught in the trap

      Delete
  3. it is absolutely useless and 3rd class. I have better knowledge of other standards

    ReplyDelete