List of practice Questions

The critical micelle concentration $(CMC)$ is defined as
The critical temperature of the gas is the temperature
The counting rate observed from a radioactive source at t = 0 seconds was 1600 counts per second and t = 8 seconds it was 100 count per second. The counting rate observed, as counts per second at t = 6 seconds will be :
The coupling coefficient of the perfectly coupled coils is :
The covalent nature of $AlCl_3$ can be justified orthe basis of
The correct structure of zwitter ion of sulphanilic acid is
The count rate from $100\, cm^{3}$ of a radioactive liquid is $c$. Some of this liquid is now discarded. The count rate of the remaining liquid is found to be $c/10$ after three half-lives. The volume of the remaining liquid, in $cm^{3}$, is
The correct statement of the law of equipartition of energy is
The correct statement variation of the conductivity of semiconductors like Ge and Si is given by
The correct structure of monomers of buna-$S$ is
The correct relation of the following is
The correct relationship between free energy change in a reaction and the corresponding equilibrium constant, $K_c$ is
The correct sequence of decrease in the bond angles of the following hydrides is
The correct sequence of the oxidation state of underlined elements is $Na_{2}\left[\frac{Fe}{ }\left(CN\right)_{5}N O\right]$, $K_{2} \frac{Ta}{ }F_{7}$, $Mg_{2}P_{2}O_{7}$, $Na_{2} \frac{S_{4}}{ }O_{6}$, $\frac{N_{3}}{ }H $
The correct order of the packing efficiency in different types of unit cells is
The correct plot of the magnitude of magnetic field $\vec{B}$ $vs$ distance $r$ from centre of the wire is, if the radius of wire is $R$
The correct relation between joule and erg is
The correct order of leaving group ability in nucleophilic substitution reaction is
The correct order of radii is
The correct order of reactivity of halogens with alkalies is
The correct order of the increasing basicity of methyl amine, ammonia and aniline is
The correct order of electron affinity among the following is
The correct order of electronegativity among halogens is :
The correct order of increasing energy of atomic orbitals is
The correct order of increasing radii of the ions $ {Br^{-}, F^{-} , O^{2-}}$ and $ {S^{2-}}$ is as follows: