1)The substance among the following which
turns blue litmus to red(. )
a)NaoH
b)koH
c)mg(oH)2
d)CH2 COOH
answer plzzz......
Answers
Acids have a general property to release hydrogen ion H
+
in the solution medium, due to which they turn the blue litmus red.
Dissociation of CH
3
OH (methanol) won't produce enough protons/hydrogen ions to shift the equilibrium towards the acidic side and hence it won't affect the colour of the litmus solution.
Acetic acid (CH
3
COOH) undergoes dissociation to release hydrogen ions which makes it acidic.
Thus, it can change the colour of the blue litmus solution to red.
CH
3
COOH→CH
3
COO
−1
+H
+
However, in the case of CH
3
COOCH
3
and CH 4, the hydrogen atoms are covalently bonded to the carbon atoms and hence they are not released as hydrogen ions in the solution, thus they do not change the colour of the litmus solution
Hence, the correct answer is the option (B).