Advertisements
Advertisements
प्रश्न
Which of the following is an acid-base indicator?
पर्याय
Vinegar
Lime water
Turmeric
Baking soda
Advertisements
उत्तर
Turmeric
Explanation:
Turmeric is an acid-base indicator. It is yellow in acidic solution and red in basic solution.
APPEARS IN
संबंधित प्रश्न
You have been provided with three test tubes. One of them contains distilled water and the other two contain an acidic solution and a basic solution, respectively. If you are given only red litmus paper, how will you identify the contents of each test tube?
What colour does the turmeric paper turn when put in an alkaline solution?
Which chemical is injected into the skin of a person during the nettle leaf hair sting?
How can the effect of this sting be neutralised?
Name a sodium compound which is a constituent of many dry soap powders.
Give two examples of the following:
hydracids
Do basic solutions also have H+(aq)? Why are they basic?
Which gas is usually liberated when an acid reacts with a metal? Illustrate with an example. How will you test for the presence of this gas?
Write a balanced reaction for the following conversions (A, B, C, D)
\[\ce{Fe→[A]FeCl2 →[B]FeCO3→[C]Fe(NO3)2→[D]Fe(OH)2}\]
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.
Complete the following equation.
HCl + ______ → NaCl + H2O
