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The predominant form of histamine present in human blood is (pKa, Histidine = 6.0)

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All the students of a class performed poorly in Mathematics. The teacher decided to give grace marks of 10 to each of the students. Which of the following statistical measures will not change even after the grace marks were given ?

Let $T_{n}$be the number of all possible triangles formed by joining vertices of an n-sided regular polygon. If $T_{n+1}−T_{n}=10$, then the value of n is

The statement $(p↔q)$ is

The x-coordinate of the incentre of the triangle that has the coordinates of mid points of its sides as (0, 1), (1, 1) and (1, 0) is

An organic compound A upon reacting with NH3 gives B. On heating B gives C. C in presence of KOH reacts with $Br_{2}to giveCH_{3}CH_{2}NH_{2}.$ A is

The number of geometric isomers that can exist for square planar $[Pt(Cl)(py)(NH_{3})(NH_{2}OH)]_{+}$ is (py = pyridine):

For the non – stoichiometre reaction $2A+B→C+D$ , the following kinetic data were obtained in three separate experiments, all at 298 K The rate law for the formation of C is:

3 g of activated charcoal was added to 50 mL. of acetic acid solution (0.06N) in a flask. After an hour it was filtered and the strength of the filtrate was found to be 0.042 N. The amount of acetic acid adsorbed (per gram of charcoal) is :