4 A acid has a very small quantity of water. (a) dilute (b)concentrated (c) neutral Baking soda solution turns pink china rose indicator green, it is O (d) polluted 5.
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it is concentrated. hope it helps.
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What colour do the following indicators turn when added to a base or alkali (such as sodium hydroxide)?
(a) methyl orange
(b) litmus
(c) red cabbage extract
ANSWER:
(a) Methyl orange: Methyl orange changes its colour to yellow when added to a base or an alkali.
(b) Litmus paper: Red litmus paper turns blue, whereas blue litmus paper remains blue in a base or an alkali.
(c) Red cabbage extract: Red cabbage extract turns greenish-yellow in basic solutions.
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