Teaching BPSC बिहार मध्य विद्यालय (6 to 8) शिक्षक भर्ती 4.0 Mock Test General Science Chemistry Equilibrium
Which indicator is colourless in acidic medium and turns pink in basic medium
1
Litmus
2
Methyl Orange
3
Phenolphthalein
4
More than one of the above
5
None of the above