List of practice Questions

At $ 500 \,K $ , the half-life period of a gaseous reaction at an initial pressure of $ 80\, kPa $ is $ 350 \,s $ . When the pressure is $ 40 \,kPa $ , the half-life period is $ 175 \,s $ . The order of the reaction is

Chlorination of benzene in the presence of halogen carrier is an example of

Chlorobenzene on treatment with sodium in dry ether gives diphenyl. The name of the reaction is

Choose the amide which on reduction with $ LiAl{{H}_{4}} $ yields a secondary amine

Identify the product/s in the following reaction. $ 3C{{H}_{3}}CH=C{{H}_{2}}\xrightarrow[{}]{B{{H}_{3}}}X\xrightarrow[{}]{{{H}_{2}}{{O}_{2}}/O{{H}^{-}}} $ $ product/s+{{H}_{3}}B{{O}_{3}} $

If the kinetic energy of the particle is increased to $16$ times its previous value, the percentage change in the de Broglie wavelength of the particle is

In the Hofmann rearrangement of primary amides having optically active group with S-configuration, the product amine has

Sodium peroxide which is a yellow solid, when exposed to air becomes white due to the formation of

The $\alpha$- and $\beta$- forms of glucose are

The boiling point of para nitrophenol is greater than ortho nitrophenol, because:

The correct increasing order of the acid strength of benzoic acid $(I), 4$ -nitrobenzoic acid $(II), 3,4$ -dinitrobenzoic acid(III) and $4$-methoxybenzoic acid $(IV)$ is

The order of reaction is decided by

The partial pressure of oxygen in the alveolar air is:

Among the following elements, which one exhibits both positive and negative oxidation states?

Among the transition metals of 3d series, the one that has the highest negative $M^{2+} /M$ standard electrode potential is

An inorganic salt $(A)$ is decomposed on heating to give two products $(B)$ and $(C)$. Compound $(C)$ is a liquid at room temperature and is neutral to litmus while the compound $(B)$ is a colourless neutral gas. Compounds $(A)$, $(B)$ and $(C)$ are

Carbohydrates are stored in human body as the polysaccharide

Germanium of very high purity is obtained by

In which one of the following, d-d transition involves absorption in the ultraviolet region

The amount of solute (molar mass $ 60\text{ }g\text{ }mo{{l}^{-1}} $ ) that must be added to $180\, g$ of water so that the vapour pressure of water is lowered by $10\%$, is

The dispersed phase and dispersion medium in soap lather are respectively

The molality of the $3\,M$ solution of methanol if the density of the solution is $0.9\, g\, cm^{-3}$ is

The monomers used for their preparation of nylon-$2$-nylon-$6$ is/are

$0.02$ mole of $[Co(NH_{3})_{5}Br]Cl_{2}$ and $0.02$ mole of $[Co(NH_{3})_{5}Cl]SO_{4}$ are present in $200\, cc$ of a solution $X$. The number of moles of the precipitates $Y$ and $Z$ that are formed when the solution $X$ is treated with excess silver nitrate and excess barium chloride are respectively

Sulfonation of benzene with excess sulfuric acid provides