Question

3. Consider the following statements:
a. Both acids and bases change colour of all indicators.
b. If an indicator gives a colour change with an acid, it
does not give a change with the base.
c. If an indicator changes colour with the base, it does
not change colour with an acid.
d. Change of colour in an acid and a base depends on
the type of the indicator.
Which of the above statements are correct?
1 point
All 4 statements
O a&d
Ob&c
Only d​

Answer 1

Answer:

An assemblage of microliths can be used to date an archeological site. Laminar microliths are slightly larger, and are associated with the end of the Upper Paleolithic and the beginning of the Epipaleolithic era; geometric microliths are characteristic of the Mesolithic and the Neolithic.

Answer 2

Answer:

a) Only (iv) All indicators do not change colour with acids as well as bases, e.g. turmeric changes its colour to pink with base but it remains yellow with acid. Therefore, statement (i) is incorrect.

Explanation:

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