List of top Chemistry Questions

Identify the product and its colour when $MnO_2$ is fused with solid $KOH$ in the presence of $O_2$
The carbonate that will not decompose on heating 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
Cetyltrimethylammonium bromide is a popular
Disaccharide in milk is
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 ?
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
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)
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}} $ ?
Consider the following antibiotics (i) Erythromycin (ii) Ofloxacin (iii) Chloramphenicol (iv) Penicillin (v) Tetracycline. The pair of bactericidal antibiotics is
Glucose does not react with
A solution of methanol in water is $20\%$ by volume. If the solution and pure methanol have densities of $0.964 \; kg \; L^{-1}$ and $0.793 \; kg \; L^{-1}$, respectively, find the percent of methanol by weight?
Plot of $ log\text{ }x/m $ against log $p$ is a straight line inclined at an angle of $ 45{}^\circ $ . When the pressure is $ 0.5 \,arm $ and Freundlich parameter. $ k $ is $ 10 $ , the amount of solute adsorbed per gram of adsorbent will be $ (log\text{ }5=0.6990) $
A weak monobasic acid is 1% ionized in 0.1 M solution at $ 25{}^\circ C $ . The percentage of ionisation in its 0.025 M solution is
In the complex with formula $MCl_3 \cdot 4H_2O,$ the coordination number of the metal M is six and there is no molecule of hydration in it. The volume, if 0.1 M $AgNO_3$ solution needed to precipitate the free chloride ions in 200 mL of 0.01 M solution of the complex, is
A metal M of equivalent mass E forms an oxide of molecular formula $M_x O_y$. The atomic mass of the metal is given by the correct equation
What mass of calcium chloride in grams would be enough to produce 14.35 g of AgCl ? (At. mass : Ca =40 ; Ag = 108)
The structural formula of 2-methyl-2-butene is
Intermediate involved in Reimer-Tiemann reactionis