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JEE Main

$pK_{a}$ of a weak acid (HA) and $pK_{b}$ of a weak base (BOH) are 3.2 and 3.4, respectively. The pH of their salt (AB) solution is:-

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The area (in sq. units) of the quadrilateral formed by the tangents at the end points of the latera recta to the ellipse $9x_{2} +5y_{2} =1$, is:

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

Which one of the following molecules is expected to exhibit diamagnetic behaviour?

Arrange the following compounds in order of decreasing acidity:

The negation of $s∨(r∧s)$ is equivalent to :

If m is the A.M. of two distinct real numbers $l$and $n(l,n>1)$and$G_{1},G_{2}$ and $G_{3}$ are three geometric means between $l$and n, then $G_{1}+2G_{2}+G_{3}$equals,

Which of the following compounds is not an antacid ?

The vapour pressure of acetone at $20_{∘}C$ is 185 torr. When 1.2 g of a non - volatile substance was dissolved in 100 g of acetone at $20_{∘}C$, its vapour pressure was 183 torr. The molar mass $(gmol_{−1})$ of the substance is :