List of top Chemistry Questions

For a reaction between gaseous compounds, $\hspace20mm 2A + B \longrightarrow C + D$ the reaction rate = k[A][B]. If the volume of the container is made $\frac{1}{4}$ of the initial, then what will be the rate of reaction as compared to the initial rate?

Identify the reaction which is used to Jlbtain $\beta$-hydroxy ketone.

Which of the following is the correct order of priority of group in D-glyceraldehyde?

Experiment to study kinetics of the dissociation of hydrogen peroxide must be performed by group of two or three so that

Formic acid and acetic acid can be distinguished by

When ethylamine reacts with sodium metal, the gas evolved is

When H₂S gas is passed through the HCl containing aqueous solution of CuCl₂, HgCl₂, BiCl₃ and CoCl₂, it does not precipitate out

Three separate samples of a solution of a single salt gave these results. One formed a white precipitate with excess ammonia solution, one formed a white precipitate with dil. HCl solution and one formed a black precipitate with H₂S. The salt could be

Which one of the following statements is correct?

Match List I (Reaction) with List II (Reagent) and select the correct answer. arrayl l List I & List II
I. Etard reaction & A. Alcoholic KOH
II. Hydroxylation & B. Anhydrous AlCl₃
III. Dehydrohalogenation & C. Chromyl chloride
IV. Friedel–Crafts reaction & D. Dilute alkaline KMnO₄ array

Which of the following will not form a yellow precipitate on heating with an alkaline solution of iodine?

The correct order of reactivity of halogens with alkalis is

Which of the following has square planar geometry?

In which of the following conversions, phosphorus pentachloride is used as the reagent?

In the manufacture of iron from haematite, limestone is added to act as

The activation energy for a simple chemical reaction A → B is Eₐ in the forward direction. The activation energy for reverse reaction

The following data are for the decomposition of ammonium nitrite in aqueous solution: arrayc c Vol. of N₂ in cc & Time (min)
6.25 & 10
9.00 & 15
11.40 & 20
13.65 & 25
35.65 & ∞ array The order of reaction is:

Which of the following will form the cathode with respect to iron an electrode cell?

Coolant used in radiator is aqueous solution of ethylene glycol. In order to prevent the solution from freezing at -0.3C, how much ethylene glycol must be added to 5 kg of water? (Kf = 1.86K kg mol⁻¹)

Which liberates ammonia when treated with water?

Minamata disease is due to pollution of

Liebig’s method is used for the estimation of

Hyperconjugation involves

The unsaturated hydrocarbon which on ozonolysis gives one mole each of formaldehyde, acetaldehyde and methyl glyoxal (CH₃COCHO) is