Question

EX
1. A survey was conducted by a group of students as a part of their environment awarenes
programme, in which they collected the following data regarding the number of plants i
20 houses in a locality. Find the mean number of plants per house.
6-8
10-12
8-10
4-6
12-14
2-4
Number of plants
0-2
1
5
6
2
3
2
Number of houses
the mean and why?​

Answer 1

Answer:

Indicators are those substances which tell us whether a substance is acidic or basic by change in colour. For e.g., litmus solution.

• Olfactory indicators: Those substances whose odour changes in acidic or basic media are called lfactory indicators. For e.g., clove, vanilla, onion.