List of top Chemistry Questions

Calculate the number of atoms present in 1.625 g metal if it forms bcc unit cell structure.
\([ρ\times a^3 = 3.25\times 10^{-22} \text{g}]\)

For the following redox reaction, find the correct statement.
\(\text{Sn}^{2+}+2\text{Fe}^{3+}\rightarrow \text{Sn}^{4+}+2\text{Fe}^{2+}\)

What is the correct IUPAC name for a molecule that has two amino groups in opposing (para) locations around a benzene ring?

Identify from following the conjugate base of \([\text{Zn}(\text{H}_2\text{O})_4]^{2+}\)

Match List I with List II

List I	List II
(A). Inductive effect	(I). Delocalization of \(π\) electrons
(B). Hyper-conjugation	(II). Displacement of \(π\) electrons
(C). Resonance effect	(III). Delocalization of \(σ\) electrons
	(IV). Displacement of \(σ\) electrons

Choose the correct answer from the options given below:

Which of the following is the most abundant element in universe?

What is IUPAC name of the compound \(\text{CH}_3\text{CH=CHCH=CHCOOH}\) ?

Calculate pOH of 0.001M HCl solution.

For a reaction to be spontaneous at all temperatures, the values of enthalpy change and entropy change should be

Find \(\Delta n\) when 1 mol of each \(\text{NH}_{3(g)}\) and \(\text{HCl}_{(g)}\), reacts to form solid \(\text{NH}_4\text{Cl}\).

What is the solubility product of binary sparingly soluble salt BA if 100 mL saturated solution of salt consist \(10^{-4}\) moles at room temperature?

For a certain reaction, \(\Delta H^0\) is \(-345\) kJ and \(\Delta S^0\) is \(-123 \text{JK}^{-1}\). At what temperature the change over from spontaneous to nonspontaneous will occur?

Calculate the new pressure of the gas enclosed in a cylinder when it compressed from 5 L to 2 L at 1 atm and 300 K. The final temperature in this process is 500 K.

What type of bond and type of overlapping present in \(\text{N}_2\) molecule ?

What is number of hydrogen molecules needed to synthesize 3.4 g of ammonia by reaction with nitrogen?

Identify the group of periodic table that contains element Astatine.

If the velocity of the electron in Bohr's first orbit is \(2.19\times 10^6 \text{Ms}^{-1}\), Calculate the de Broglie wavelength associated with it.
\([h = 6.626\times 10^{-34} \text{J s}\) & Mass of electrons \(= 9.10938\times 10^{-31}\) kg \(]\)

Find the mass of sodium carbonate in grams to form 100 ml 0.1 M solution in water?
( Molar mass of \(\text{Na}_2\text{CO}_3\) = 106 g/mol)

In the following sequence of the reaction, the final product "C" is-

Find the structure of A in following reaction

The major product 'B' in the below mentioned reaction is-

Which of the following species is used in Friedel - Craft reaction?

Consider the following chemical reaction and identify the intermediate involved in the reaction.

Consider the following chemical reaction and identify the final product(s)

The final product(s) of the above reaction is