List of practice Questions

If $ y={{\sin }^{-1}}\sqrt{1-x}, $ then $ \frac{dy}{dx} $ is equal to

An insoluble dye is reduced to a soluble colourless leuco form by an alkaline reducing agent. The fibre is soaked in the dye solution and then exposed to air to develop the colour. The dye is

The reaction of $H_2$ is given below $H_2 + CO + R - CH = CH_2 \to R - CH_2 - CH_2 - CHO$ is specifically called as

A compound ?A?with molecular formula CHO gives a positive 2, 4 DNP test but a negative Tollen?s test. On treatment with sodium hypochlorite, it gives CHCl and compound ?B?. Compound ?B? is

Air at sea level is dense. This is a practical implimentation of:

Allyl cyanide molecule contains

An element 'X' belongs to fourth period and fifteenth group of the Periodic Table. Which one of the following is true ?

Aniline is separated from aniline-water mixture by

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