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

If liquids A and B form an ideal solution, the ______.

For a reaction, given below is the graph of ln k vs `1/"T"`. The activation energy for the reaction is equal to ______ cal mol^-1. (Nearest integer) (Given : R = 2 cal K^-1 mol^-1)

Which one of the following statements is not true about enzymes?

Which of the following chemical reactions represents Hall- Heroult Process?

The purest form of commercial iron is ______.

Which of the following is the most stable carbocation?

Among the following statements on the nitration of aromatic compounds, the false statement is:

The energy of an electron in the first Bohr orbit of the H-atom is −13.6 eV. The energy value of an electron in the excited state of Li²⁺ is ______.

Which one of the following has the largest ionic radius?

Low oxidation state of metals in their complexes are common when ligands ______.

Which will have the highest enol content?

	\[\ce{CH2 = \overset{⊕}{C}H}\]	\[\ce{CH3 - \overset{⊕}{C}H2}\]	\[\ce{HC ≡ \overset{⊕}{C}}\]
A	B	C	D

The correct order of stability of given carbocation is:

A solution of (–) – 1 – chloro–1–phenylethane in toluene racemises slowly in the presence of a small amount of SbCl₅, due to the formation of ______.

The increasing order of stability of the following free radicals is ______.

In a hydrogen-oxygen fuel cell, combustion of hydrogen occurs to ______.

In general, the property (magnitudes only) that shows an opposite trend in comparison to other properties across a period is ______. 

Compound A is converted to B on reaction with CHCl₃ and KOH. The compound B is toxic and can be decomposed by C. A, B and C respectively are ______.

Consider the elements Mg, Al, S, P and Si, the correct increasing order of their first ionization enthalpy is ______.

The correct order of intensity of colors of the compounds is ______.

An inorganic compound 'X' on treatment with concentrated H₂SO₄ produces brown fumes and gives a dark brown ring with FeSO₄ in presence of concentrated H₂SO₄. Also, compound 'X' gives precipitate 'Y', when its solution in dilute HCl is treated with H₂S gas. The precipitate 'Y' on treatment with concentrated HNO₃ followed by an excess of NH₄OH further gives a deep blue coloured solution, compound 'X' is: