List of top Chemistry Questions

In chromatographic techniques, which of the following follows preferential adsorption?

Column chromatography
Thin layer chromatography
Paper chromatography

Match the following:

	LIST I		LIST II
A	Lyman	I	Near IR
B	Balmer	II	Far IR
C	Paschen	III	Visible
D	p-fund	IV	UV

The correct statement about Zn, Cd, Hg are

The major product

The major product in the above reaction is

Which reagent gives bright red ppt. With \(Ni^{2+}\) in basic medium?

How many of the following compounds have zero dipole moment ?
\(NH_3, H_2O, HF, CO_2, SO_2, BF_3, CH_4\)

Why does oxygen show anomalous behavior ?

Which of the following elements has the highest 1st ionization energy ?

The ratio of magnitude of potential energy and kinetic energy for \(5^{th}\) excited state of hydrogen atom is

Problem Fig

An ideal gas undergoes a cyclic transformation starting from the point \( A \) and coming back to the same point by tracing the path \( A \to B \to C \to A \) as shown in the diagram. The total work done in the process is \( \_\_\_\_ \) J.

Find out charge (in C) required for electrolysis of \(1\) mole of \(H_2O\) to produce \(O_2\) on one of the electrodes. \((F = 96500 \;C)\)

Ethylene glycol of \(x\) \(kg\) is mixed with \(18.6\) \(kg\) of solvent, \(24 °C\) depression in freezing point takes place. Calculate value of \(x\). (Given: \(K_1\) = \(1.6 °C/molal\) M.W. of ethylene glycol = \(62\) \(g/mol\))

Consider the following two statements
Statement I: In \(p\) and \(d\) block both metals and non - metals are present
Statement II: Electronegativity and ionisation enthalpy of metals is greater than non - metals

Consider the following two statements Statement I: \(SiO_2\) and GeO₂\(GeO_2\) are acidic, \(SnO\) and \(PbO\) are amphoteric Statement II: Allotropes of carbon are formed due to catenation and \(dπ - ρπ\) bond

Consider the following two statements Statement I: \(π\) \(2p\) bonding molecular orbital has low electron density above & below internuclear axis Statement II: \(π\times2p\) antibonding molecular orbital has only one nodal plane

Which is following compound is easily attacked by electrophile?

Complementary stand of DNA ATGCTTCA is:

Which of the following is correct for adiabatic free expansion against vacuum?

We are given with three NaCl samples and their Van't Hoff factors. Which is correct option ?

Sample	Van't Haff Factor
Sample - 1 (0.1 M)	\(i_1\)
Sample - 2 (0.01 M)	\(i_2\)
Sample - 3 (0.001 M)	\(i_2\)

Which of the following have a trigonal bipyramidal shape?
\(PF_5, PBr_5, [PtCl_4], SF_6, BF_3, BrF_5, PCl_5, [Fe(CO)_5]\)

Number of radial nodes present in 3p are

Which of the following compounds have colour due to d-d transition?

Which of the following compounds has intramolecular hydrogen bonding in it?

Which of the following has the highest 3rd ionization energy?

A \(10\) \(mL\) hydrocarbon \((C_2H_4)\) on combustion give \(40\) \(mL\) \(CO_2\) and \(50\) \(mL\) \(H_20\). Calculate the value of \(x+y\)