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

A is:

A substance was known by its mode of synthesis to contain 10 atoms of carbon per molecule along with unknown number of atoms of chlorine hydrogen and oxygen. Analysis showed 60.5% carbon, 5.55% hydrogen, 16.10%j oxygen and 17.9% chlorine. The Empirical formula of the compound is ______.

In a certain region of space there are only 5 molecules per cm³ on average. The temperature is 3 K. The average pressure of this very dilute gas is ______ × 10^-21 atoms. 

The activating nature of \[\ce{- CH3}\] group linked to benzene ring can be explained with the help of ______.

The Non-proteinous substances which certain enzymes required for their activity are called ______.

Dinitrogen is a robust compound, but reacts at high altitudes to form oxides. The oxide of nitrogen that can damage plant leaves and retard photosynthesis is ______.

The magnetic moment of central atom of [Co(NH₃)₆]³⁺ is ______.

The orbital having two radial as well as two angular nodes is ______.

Spin only magnetic moment in BM of \[\ce{[Fe(CO)4(C2O4)]+}\] is ______.

Identify the incorrect statement for PCl₅ from the following.

In which of the following reactions, an increase in the volume of the container will favour the formation of products?

The number of sigma bonds in

\[\begin{array}{cc}
\phantom{}\ce{H3C - C = CH - C ≡ C - H}\\
|\phantom{.............}\\
\ce{H}\phantom{.............}
\end{array}\]

Which one of the following reactions indicated the reducing ability of hydrogen peroxide in basic medium?

Geraniol, a volatile organic compound, is a component of rose oil. The density of the vapour is 0.46 g L^–1 at 257°C and 100 mm Hg. The molar mass of geraniol is ______ g mol^–1. (Nearest Integer)

[Given: R = 0.082 L atm K^–1 mol^–1]

When 9.45 g of ClCH₂COOH is added to 500 mL of water, its freezing point drops by 0.5°C. The dissociation constant of ClCH₂COOH is x × 10⁻³. The value of x is ______. (Rounded-off to the nearest integer)

[\[\ce{K_{f(H_2O)}}\] = 1.86 K kg mol⁻¹]

An element belonging to 3d series of modern periodic table has spin magnetic moment = 5.92 B.M. in +3 oxidation state. The atomic number of elements are ______.

A storage battery contains a solution of H₂SO₄ 38% by weight. At this concentration, Van't Hoff Factor is 2.50. At the battery content freeze temperature will be ______ K.

(K_f = 1.86 K Kg mol⁻¹)

The product of reaction between 1,1,2,2-tetrachloro propane and Zn dust/Δ ______.

The degree of dissociation of Ca(NO₃)₂ in a dilute aqueous solution containing 7 g of the salt per 100 g of water at 100°C is 70%. If the vapour pressure of water at 100°C is 760 mm. The vapour pressure of the solution is ______ mm.

The sum of the number of σ-bonds to π-bonds in C₂(CN)₄ molecule is ______.