dll and IV
Rama has a drink and want to decide its nature. For this, she do the following
experiments
Experiment
Observation
1.
She taste a few drops of it
Bitter taste
2.
She takes a few drops of it
on her palm and rub
Soapy feeling
On the basis of these observations, she predicted that the nature of drink is
a acidic
b basic
c amphoteric d unable to predict
Answers
Explanation:
"On" (and any subsequent words) was ignored because we limit queries to 32 words.
Answer:
Curd, lemon juice, orange juice and vinegar taste sour. These substances taste sour because they contain acids. The chemical nature of such substances is acidic. The word acid comes from the Latin word acere which means sour. The acids in these substances are natural acids.
What about baking soda? Does it also taste sour? If not, what is its taste? Since, it does not taste sour it means, that it has no acids in it. It is bitter in taste. If you rub its solution between fingers, it feels soapy. Substances like these whichare bitter in taste and feel soapy on touching are known as bases. The nature of such substances is said to be basic.
If we cannot taste every substance,how do we find its nature?
Special type of substances are used to test whether a substance is acidic or basic. These substances are known as indicators. The indicators change their colour when added to a solution containing an acidic or a basic substance. Turmeric, litmus, china rosepetals (Gudhal), etc., are some of the naturally occurring indicators.
Explanation: