Teaching BPSC बिहार मध्य विद्यालय (6 to 8) शिक्षक भर्ती 4.0 Mock Test General Science Chemistry Equilibrium
Which of the following is an olfactory indicator?
1
Phenolphthalein
2
Vanilla
3
Red cabbage juice
4
More than one of the above
5
None of the above