We know that the bases turn red litmus into blue.
Therefore, when a drop is placed in each test tube on a red litmus paper that turns blue can easily be seen as a base. After that, the remaining test tubes contain refined water or acid.
Now, find out exactly the content of these test kits – a drop of the basic solution is mixed with the drop of each solution in the remaining ones separately and take into account the nature of the compound drops.
If the red litmus color turns blue, the second solution is neutral and if there is no change in color, the second solution is acidic.
In the sense of neutrality, we know that acidic and basic solutions are declining. Therefore, we can distinguish between three types of solutions and identify the contents of each test tube.
and 
, internal resistance 
and 
, connected in parallel. The equivalent emf of the combination is- (A) 
(B) 
(C) 
(D) 
and 
are collinear, prove that 
and 
be three points such that area of a 
is 4 sq units, find the value of 
.
and 
is 35 sq units.
and 
are collinear.
and 
are collinear.
and 
are collinear.
and 