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Acids Bases and...

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  • Question 1
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    Which of the following is a natural source of oxalic acid?

  • Question 2
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    Lichen is a symbiotic association of a fungus and an alga (such as cyanobacteria). Which of the following indicators is obtained from it?

  • Question 3
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    Which pair of indicators shows no colour change when used with acidic solutions?

  • Question 4
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    Red litmus turns blue in the presence of

  • Question 5
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    Which of the following gases does not contribute to acid rain?

  • Question 6
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    The sting of an ant contains formic acid. Which of the following basic substances is used to neutralise it?

  • Question 7
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    What is the chemical name of lime?

  • Question 8
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    A/an  is  to taste. It turns turmeric paper or solution reddish brown.

    What are 'a' and 'b', respectively?

  • Question 9
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    In which of the following chemical processes does the reaction mixture become hot?

  • Question 10
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    What will be effect of turmeric solution on common salt?

  • Question 11
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    Which of the following would turn reddish brown with soap solution?

  • Question 12
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    Priya took a solution and tested it with an indicator. She observed that the indicator turns the solution to magenta. Which of the following respectively could probably be the solution and indicator used?

  • Question 13
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    Which of the following is added to neutralise basic soil?

  • Question 14
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    Milk of magnesia is a base. It is used as a/an

  • Question 15
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    What is common to vinegar, ant's sting and tamarind?

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