True.
A catalyst is a substancr that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.
Answer:
1. Methyl orange indicator: This shows pH in a colouess solution if it changes from colourless to red.
2. Phenolphthalein indicator: This shows pH of a coloured solution if it changes from purple to colorless.

Explanation:
1L=1000mL
1dm³=1L
1dm³=1000cm³
29.84ml-29.00ml=0.84ml
Density=mass(g)/volume(cm³)
=6.6g/(0.84cm³)
=?