WBJEE (Chemistry) Model Test

The amount of the heat released when 20 ml 0.5 M NaOH is mixed with 100 ml 0.1 M HCl is x kJ. The heat of neutralization is

If the molecular wt. of Na₂S₂O₃ and I₂ are M₁ and M₂ respectively, then what will be the equivalent wt. of Na₂S₂O₃ and I₂ in the following reaction?

An electric current is passed through an aqueous solution of a mixture of alanine (isoelectric point 6.0) glutamic acid (3.2) and arginine (10.7) buffered at pH 6. What is the fate of the three acids?

2 gm of metal carbonate is neutralized completely by 100 ml of 0.1 (N) HCl. The equivalent weight of metal carbonate is

The electronic transitions from n = 2 to n = 1 will produce shortest wavelength in (where n = principal quantum state)

The ease of dehydrohalogenation of alkyl halide with alcoholic KOH is

In the following electron – dot structure, calculate the formal charge from left to right nitrogen atom

The ozone layer forms naturally by

The standard reduction potential E° for half reations are Zn = Zn⁺² + Ze E° = +0.76 V Fe = Fe⁺² + Ze E° = + 0.41 V The EMF of hte cell reaction Fe⁺² + Zn = Zn⁺² + Fe is

An element belongs to Group 15 and third period of the periodic table. Its electonic configuration will be

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

Which one of the following is paramagnetic?

Among the alkenes which one produces tertiary bytyl alcohol on acid hydration

The representation of the ground state electronic configuration of He by box – diagram as ↑ ↑ is wrong because it violates

A radioactive atom ^X_YM emits two α particles and one β particle successively. The number of neutrons in the nucleus of the product will be

The ease of Nitration of the following three hydrocarbons follows the order  

The correct order of decreasing acidity of nitrophenols will be

Which one of the following is not true at room temperature and pressure

Two aromatic compounds having formula C₇H₈O which are easily identifiable by FeCl₃ solution test (violet colouration) are

Which one of the following has the lowest ionization energy?