List of top Chemistry Questions asked in KEAM

In the Hofmann rearrangement of primary amides having optically active group with S-configuration, the product amine has
The boiling point of para nitrophenol is greater than ortho nitrophenol, because:
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
The partial pressure of oxygen in the alveolar air is:
The $\alpha$- and $\beta$- forms of glucose are
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}} $
Sodium peroxide which is a yellow solid, when exposed to air becomes white due to the formation of
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
An element 'X' belongs to fourth period and fifteenth group of the Periodic Table. Which one of the following is true ?
Allyl cyanide molecule contains
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
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
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 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
In which one of the following, d-d transition involves absorption in the ultraviolet region
Among the following elements, which one exhibits both positive and negative oxidation states?
Germanium of very high purity is obtained by
Among the transition metals of 3d series, the one that has the highest negative $M^{2+} /M$ standard electrode potential is
The dispersed phase and dispersion medium in soap lather are respectively
$0.02$ 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
Read the statements regarding muscle proteins. i. Actin is a thin filament and is made up of two $F$-actins, ii. The complex protein, tropomyosin is distributed at regular intervals on the troponin iii. Myosin is a thick filament which is also a polymerized protein iv. The globular head of meromyosin consists of light meromyosin $(LMM)$
20.0 kg of H\(_2\)(g) and 30 kg of H\(_2\)(g) are reacted to produce NH3(g). The amount of NH3(g). formed is