List of practice Questions

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

A buffer solution is used in

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 $\left(1\, F =96500\, C\, mol ^{-1}, R=8.314\, J\, K ^{-1} mol ^{-1}\right)$

Highest number of antibiotics are produced by

The geometry of sulphate ion is

Which of the following is an aromatic compound?

Which of the following orbital diagram violates Faults exclusion principle?

By which of the following processes, pure nitrogen gas is prepared?

In the following reaction, $C _{2} H _{5} OH + CH _{3} COOH \xrightarrow[- H _{2} O ]{\text { Conc. } H _{2} SO _{4}} CH_3COOC_2H_5 \,\,\,\, C_2H_5OH$ acts as

$HCl $ molecule contains

The $C-H$ bond distance is the longest in

Which represents the correct order of first ionisation potential of third period elements?

Haeckel's biogenetic law is

Given $P(x) = x^4 + ax^3 + bx^2 + cx + d$ such that $x = 0$ is the only real root of $P'(x) = 0$ . If $P(-1) < P(1)$ , then in the interval $[-1, 1]$

Genes are made up of