List of practice Questions

Knowing that the Chemistry of lanthanoids $(Ln)$ is dominated by its $+3$ oxidation state, which of the following statements in incorrect ?

Insectivorous plants are usually adapted to

Inflammation of joints due to accumulation of uric acid crystals is called as

In zone refining method, the molten zone

In Young's double slit experiment, the two slits act as coherent sources of equal amplitude a and of wavelength $\lambda$. In another experiment with the same set up, the two slits are sources of equal amplitude a and wavelength $\lambda$, but are incoherent. The ratio of intensities of light at the mid point of the screen in the first case to that in the second case is

$2$-acetoxy benzoic acid is

Which is necessary for conversion of butane-$2$-one into propanoic acid?

The number of radial nodes of $3\,s$ and $2\,p$ orbital are

The ratio of rates of diffusion of helium and methane under same conditions of temperature and pressure will be

A sodium salt on treatment with $ MgCl_{2}$ gives white precipitate on heating. The anion of sodium salt is

Adsorption of gases on solid surface is exothermic since

In solid $CuSO_{4} \cdot 5H_{2}O$ copper is coordinated to number of water molecules

The acid having $ O-O $ bond is

In Oppenauer's oxidation,

In earthworm, gizzard is found in

In Cycas, pollination takes place in

In an isobaric process, when temperature changes from $T_1$ to $T_2$, $\Delta S$ is equal to

If $m_1, m_2, m_3$ and $m_4$ are respectively the magnitudes of the vectors $a_1 = 2i - j + k, a_2 = 3i - 4j - 4 k $ $a_3 = i + j - k$ and $a_4 = - i + 3j + k , $ then the correct order of $m_1, m_2, m_3 $ and $m_4$ is

If heavy water is taken as solvent instead of normal water while performing Cannizaro reaction, the products of the reaction are

If $a_1$ and $a_2$ are two non-collinear unit vectors and if $|a_1 + a_2| = \sqrt3$ ,then the value of $(a_1 - a).(2a_1 + a_2)$ is

The standard emf of a cell involving one electron charge is found to be $0.591\, V$ at $25^{\circ} C$. The equilibrium constant of the reaction is $\left(1\, F =96500\, C\, mol ^{-1}, R=8.314\, J\, K ^{-1} mol ^{-1}\right)$

A buffer solution is used in

Highest number of antibiotics are produced by

Which of the following orbital diagram violates Faults exclusion principle?

The geometry of sulphate ion is