List of top Questions asked in KCET- 2009

A bivalent metal has an equivalent mass of $32$. The molecular mass of the metal nitrate is

The smallest positive integral value of $'n'$ such that $\left[\frac {1+\sin \frac {\pi}{8}+\,i\,\cos \frac {\pi}{8}}{1+\sin \frac {\pi}{8}-\,i\,\cos \frac {\pi}{8}} \right]^n$ is purely imaginary is, $n$ =

If $\begin{vmatrix} {1+\sin^2}&{\cos^2 \theta } &{4\sin 2\theta}\\ {\sin^2}&{1+\cos^2}& {4\sin2\theta} \\ {\sin^2\theta}&{\cos^2\theta}&{4\sin2\theta-1}\\ \end{vmatrix} =0 $ and $ 0< \theta

If$\vec{a}.\vec{b}\, = \,- |\vec{a}| \, |\vec{b}|$ then the angle between $\vec{a}$ and $ \vec{b}$ is

If the volume of the parallelopiped with $ \vec{a},\vec{b} $ and $ \vec{c}$ as coterminous edges is $40 \,cubic$ units, then the volume of the parallelopiped having $ \vec{b}+\vec{c} , \vec{c}+ \vec{a} $ and $ \vec{a}+ \vec{b}$ as coterminous edges in cubic units is

Among the following, the compound that contains ionic, covalent and coordinate linkage is

The enthalpy of formation of $NH_3$ is $- 4 6\, kJ \, mol^{-1}$. The enthalpy change for the reaction : $2 NH _{3}(g) \longrightarrow N _{2}(g)+3 H _{2}(g)$ is

The magnetic Lorentz force experienced by a charge q, entering a magnetic field B with a velocity v is

Which of the following prevents the conversion of prothrombin to thrombin in an undamaged blood vessel ?

The foot of the perpendicular from the point $(2, 4)$ upon $x + y = 4$ is

The r.m.s. velocity of molecules of a gas of density $4 \,kg \,m^{-3}$ and pressure $1.2 \times10^{5} Nm^{-2}$ is

Two sources are said to be coherent if they produce waves

$30\, cc$ of $\frac {M}{3}\, HCl, 20\, cc$ of $\frac {M}{N} HNO_3$ and $40\, cc$ of $\frac {M}{4}$ $NaOH$ solutions are mixed and the volume was made up to $1\, dm^3$. The $pH$ of the resulting solution is

On the set of all natural numbers $N$, which one of the following $*$ is a binary operation ?

The electrophile involved in the sulphonation of Benzene is

Which one of the following is not true ?

Two luminous point sources separated by a certain distance are at $10 \, km$ from an observer. If the aperture of his eye is $2.5 \times 10^{-3}\,m$ and the wavelength of light used is $500 \, nm$, the distance of separation between the point sources are just seen to be resolved is

Continuous emission spectrum is produced by

Cooking is fast in a pressure cooker, because