JEE Main entrance exam Question Bank Solutions for Chemistry (JEE Main)

PbCl₄ exists but PbBr₄ and Pbl₄ do not because of ______.

In the given reaction final product(s) will be:

A gaseous mixture of He and O₂ is found to have a density of 0.518 gL^-1 at 25° C and 720 torr. The mass percent of helium in this mixture is ______.

The oxidation state of manganese in the product obtained in a reaction of potassium permanganate and hydrogen peroxide in a basic medium is ______. 

Potassium permanganate on heating at 513 K gives a product which is ______.

Potassium dichromate when heated with concentrated sulphuric acid and a soluble chloride, gives brown-red vapours of ______.

Boric acid (H₃BO₃) is ______.

Hydrogen has three isotopes: protium (¹H), deuterium (²H or D) and tritium (³H or T). They have nearly the same chemical properties but different physical properties. They differ in ______.

\[\begin{array}{cc}\phantom{......}\ce{OH}\\
\phantom{....}|\\\ce{CH3CH2 - C - CH3}\\
\phantom{....}|\\\phantom{.....}\ce{Ph}\end{array}\] cannot be prepared by ______.

Borazine, also known as inorganic benzene, can be prepared by the reaction of 3-equivalents of “X” with 6-equivalents of “Y”. “X” and “Y”, respectively are ______.

The reaction of H₃N₃B₃Cl₃(A) with LiBH₄ in tetrahydrofuran gives inorganic benzene (B). Further, the reaction of (A) with (C) leads to H₃N₃B₃(Me)₃. Compounds (B) and (C) respectively, are ______.

The correct decreasing order of priority for the functional groups of organic compounds in the IUPAC system of nomenclature is ______.

Polar stratospheric clouds facilitate the formation of ______.

The structures of beryllium chloride in the solid state and vapour phase, are ______.

In the given conversion the compound A is:

Which of the following compound does not contain sulphur atom?

Which of the following are isostructural pairs?

(A) \[\ce{SO^{2-}4}\] and \[\ce{CrO^{2-}4}\]

(B) SiCl₄ and TiCl₄

(C) NH₃ and \[\ce{NO^-3}\]

(D) BCl₃ and BrCl₃

Which of the following compound gives pink colour on reaction with phthalic anhydride in cone. H₂SO₄ followed by treatment with NaOH?

The metal that can be purified economically by fractional distillation method is ______.

Which of the following reaction DOES NOT involve Hoffmann bromamide degradation?