List of top Chemistry Questions asked in KEAM

Portland cement does not contain

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?

Identify the product and its colour when $MnO_2$ is fused with solid $KOH$ in the presence of $O_2$

Disaccharide in milk is

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

Homolytic fission of a covalent bond leads to the formation of

A sample of phosphorus trichloride $(PCl_3)$ contains 1.4 moles of the substance. How many atoms are there in the sample ?

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

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

Cetyltrimethylammonium bromide is a popular

The carbonate that will not decompose on heating is

The charge on the central metal ion in the complex $[Ni(CO)_4]$ 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 wavelength of a 1 keV photon is 1.24 nm. The frequency of 1 MeV photon is:

The value of ($\Delta H - \Delta E$) for the reaction $C_6H_6(1) + 7\frac{1}{2} O_2(g) \rightarrow 6CO_2(g) + 3H_2O(I)$ at 270C is (R = 2 cal K-1 mol-1)

Chronic chloroform exposure may cause damage to liver and kidney, due to the formation of

Choose the weak monobasic acid, among the following

In petrochemical industry, alcohols are directly converted to gasoline by passing over heated

Primary, secondary and tertiary alcohols can be distinguished by

The reaction of propene with $HBr$ in peroxide proceeds through the intermediate

In alkaline medium $ Cl{{O}_{2}} $ oxidizes $ {{H}_{2}}{{O}_{2}} $ to $ {{O}_{2}} $ and itself gets reduced to $ C{{l}^{-}} $ . How many moles of $ H_20_2 $ are oxidized by 1 mole of $ Cl{{O}_{2}} $ ?

Glucose does not react with

Consider the following antibiotics (i) Erythromycin (ii) Ofloxacin (iii) Chloramphenicol (iv) Penicillin (v) Tetracycline. The pair of bactericidal antibiotics is