List of practice Questions

The ore that is concentrated by Froth Floatation process is
The characteristic not related to alkali metal is
A covalent molecule $AB_3$ has pyramidal structure. The number of lone pair and bond pair electrons in the molecule are respectively
In electrophillic aromatic substitution reaction, the nitro group is meta directing because it
If $'n '$ is a positive integer, then $n^3 + 2n$ is divisible by
On the set of integers $Z$. define $f: Z \to Z$ as $ f(n) = \begin{cases} n/2 & \quad \text{if } n \text{ is even}\\ 0 & \quad \text{if } n \text{ is odd}\\ \end{cases} $ then $'f'$ is
In the group $\{1, 2, 3, 4, 5, 6\}$ under multiplication mod $7, 2^{-1} \times 4 =$
If only 2% of the main current is to be passed through a galvanometer of resistance G, the resistance of shunt should be
In the detection of III group basic radicals, $ {NH4OH}$ is added after $ {NH_4Cl}$ to
In the titration of Mohr's salt against $ {KMnO_4}$ the indicator used is
Lysine is
The value of $\int \frac{10^{x/2}}{\sqrt{10^{-x} - 10^{x}}}dx$ is
Electrolysis of brine gives a mixture of
$n $ type and $p$ type semiconductors can be obtained by doping pure silicon respectively with
Potential energy of two charges $10 \, nC$ each separated by a distance of 0.09 m in air is
Highest osmotic pressure is shown by a solution of
In benzene, each carbon atom undergoes
Quality factor of a series $LCR$ circuit decreases from 3 to 2. Resonant frequency is $600 \, Hz$. Change in band width is
Specific resistance of a conductor material increases with
The lowering in vapour pressure is maximum for
An example of a sulphur containing amino acid is
Power factor of a series $LCR $ circuit is
Proton and $\alpha$ particle have the same deBroglie wavelength. Which one is the same for both of them ?
The argument of the complex number $\sin\left(\frac{6\pi}{5}\right) + i\left(1 +\cos \frac{6\pi}{5}\right) $ is
The metal hydroxide which is soluble in excess of ammonium hydroxide is