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प्रश्न
Fill in the cross word given in figure with the help of the clues provided.
Across
(2) The solution which does not change the colour of either red or blue litmus.
(4) Phenolphthalein gives pink colour in this type of solution.
(7) Colour of blue litmus in lemon juice.
Down
(1) It is used to test whether a substance is acidic or basic.
(3) It is a natural indicator and gives pink colour in basic solution.
(5) Nature of ant’s sting.
(6) It is responsible for the increase in temperature during a neutralisation reaction.
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उत्तर
Across
2. Neutral
4. Base
7. Red
Down
1. Indicator
3. Turmeric
5. Acidic
6. Heat
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संबंधित प्रश्न
Name one animal whose stings contain formic acid (or methanoic acid).
The indicator which produces a pink colour in an alkaline solution is ______.
Name an acid used to flavor and preserve food.
State one observation for each of the following :
A small piece of zinc is added to dilute hydrochloric acid
Tartaric acid is a ______ acid.
Table salt is acidic.
Give four examples of preparation of acids by synthesis.
Choosing the correct words given in brackets, complete the sentence given below:
A(n) ______ (acid/basic) salt is one in which the hydrogen of an acid has been partially replaced by a ______ (metal/non-metal).
The preparation of Lead sulphate from Lead carbonate is a two-step process. (Lead sulphate cannot be prepared by adding dilute Sulphuric acid to Lead carbonate.)
Why is the direct addition of dilute sulphuric acid to Lead carbonate an impractical method of preparing Lead sulphate?
Complete the following equation.
HCl + ______ → NaCl + H2O
