Question

Which of following is appropriate to measure the depth of pond.
1.meter tape
2. rope with wooden block
3.rope with markings
4.rope with weights

Answer 1

if we has equal volume of 1m NAOH solution and if we add blude litmus in it than what will we change in litmus paper write the chemical reaction evolved ?

Answer 2

3 Rope with markings because it go at the bottom of the pond and tell you the depth