List of top Chemistry Questions

The major product P formed in the given reaction is:

Incorrect method of preparation for alcohols from the following is:

Buna-S can be represented as:

The reaction used for preparation of soap from fat is :

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R:
Assertion A: 3.1500 g of hydrated oxalic acid dissolved in water to make 250.0 mL solution will result in 0.1 M oxalic acid solution.
Reason R: Molar mass of hydrated oxalic acid is 126 g mol^–1.
In the light of the above statements, choose the correct answer from the options given below.

The electron in the \(n^{th}\) orbit of \(Li^{2+}\) is excited to \((n + 1)\) orbit using the radiation of energy \(1.47 × 10^{–1}J \) (as shown in the diagrarn). The value of n is ______ .
Given: \(R_H = 2.18 × 10^{–18} J\).

The number of endothermic process/es from the following is _____ .
A. \(I_2 (g) → 2I (g)\)
B. \(HCl (g) → H(g) + Cl (g)\)
C. \(H_2O(l) → H_2O (g)\)
D. \(C(s) + O_2 (g) → CO_2 (g)\)
E. Dissolution of ammonium chloride in water.

An aqueous solution of volume 300 cm³ contains 0.63 g of protein. The osmotic pressure of the solution
at 300 K is 1.29 mbar. The molar mass of the protein is ____ g mol^–1.
Given: R = 0.083 L bar K^–1 mol^–1

\(A(g) ⇋ 2B(g) + C(g)\)
For the given reaction, if the initial pressure is 450 mm Hg and the pressure at time t is 720 mm Hg at a constant temperature T and constant volume V. The fraction of A(g) decomposed under these conditions is \(x × 10^{–1}\). The value of x is _____ . (nearest integer)

The specific conductance of 0.0025 M acetic acid is \(5 × 10^{–5} S\ cm^{–1}\) at a certain temperature. The dissociation constant of acetic acid is ___________ \(× 10^{–7}.\) (Nearest integer) Consider limiting molar conductivity of \(CH_3COOH\) as \(400\  S cm^2 mol^{–1}\).

The number of incorrect statement/s from the following is ____ .
A. The successive half lives of zero order reactions decreases with time.
B. A substance appearing as reactant in the chemical equation may not affect the rate of reaction.
C. Order and molecularity of a chemical reaction can be a fractional number.
D. The rate constant units of zero and second order reaction are mol L^–1s^–1 and mol^–1 Ls^–1 respectively.

The difference in the oxidation state of \(Xe\) between the oxidised product of \(Xe\) formed on complete hydrolysis of \(XeF_4\) and \(XeF_4\) is _____ .

In alkaline medium, the reduction of permanganate anion involves a gain of _____ electrons.

In the reaction given below :

The Product ‘X’ is:

The correct order for acidity of the following hydroxyl compound is:

Choose the correct answer from the options given below:

The liquid which causes formation of poisonous gas when exposed to sunlight in presence of air or oxygen (O₂), is:

Lactose on hydrolysis give:

Which of the following is not correct?

Assuming [NiCl₄] as Complex-A and [Ni(CO)₄] as Complex-B, choose the correct statement. (At.No. of Ni is 28.)

Which of the following could not be a rate determining step?

Find the value of \(E^\circ\) in the missing link in following diagram

Match List -I with List-II

	List -I		List-II
A	Diamagnetic solid	I	CrO2
B	Ferromagnetic solid	II	Fe3O4
C	Antiferomagnetic solid	III	NaCl
D	Ferrimagnetic solid	IV	MnO

Choose the correct answer from the option given below

Osmotic pressure of solution formed by mixing 50 ml of 0.2 M urea and 50 ml of 0.4 m glucose aqueous solution at 298 K will be : (R=0.083 L atm K^-1 mol^-1)

t_99.9% with respect to t_99% for a first order reaction is:

Match List -I with List-II

	List -I		List-II
A	Urease	I	Maltose
B	Maltase	II	Glucose and Fructose
C	Invertase	III	NH3 and CO2
D	Diastase	IV	Glucose

Choose the correct answer from the option given below