List of top Chemistry Questions

The order of reaction is decided by

Aniline is separated from aniline-water mixture by

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

Germanium of very high purity is obtained by

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

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

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

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

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

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

The dispersed phase and dispersion medium in soap lather are respectively

Carbohydrates are stored in human body as the polysaccharide

$0.02$ 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

Portland cement does not contain

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

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 $(LMM)$

When a tertiary alcohol ‘A’ (C₄H₁₀O₄) reacts with 20% H₃PO₄ at 358 K, it gives a compound ‘B’ (C₄H₈) as a major product. The IUPAC name of the compound ‘B’ is :

Which one of the following is not a sulphide ore?

The element with atomic number 117 has not been discovered yet. In which family would you place this element if discovered?

Gabriel synthesis is used for the synthesis of:

The dihalogen derivative $'X'$ of a hydrocarbon with three carbon atoms reacts with alcoholic $ KOH $ and produces another hydrocarbon which forms a red precipitate with ammoniacal $ C{{u}_{2}}C{{l}_{2}} $ . $ 'X' $ gives an aldehyde on reaction with aqueous $ KOH $ . The compound $'X'$ is

For two isomorphous crystals $A$ and $B$, the ratio of density of $A$ to that of $B$ is $1.6$ while the ratio of the edge length of $B$ to that of $A$ is $2$. If the molar mass of crystal $B$ is $200\,g\,mol^{-1}$, then that of crystal $A$ is

The correct order of boiling points of $2, 2-dimethylpropane$, $2-methylbutane$ and $n-pentane$ is

Aldehydes that do not undergo aldol condensation are (1) propanal (2) trichloroethanal (3) methanal (4) ethanal (5) benzaldehyde