List of top Chemistry Questions

The correct sequence of bond enthalpy of ‘C–X’ bond is

The reagent ‘R’ in the given sequence of chemical reaction is

The intermediate compound ‘X’ in the following chemical reaction is

Match List - I with List - II.

List - I

List - II

(a)[Fe(CN)6]3−(i)5.92 BM
(b)[Fe(H2O)6]3+(ii)0 BM
(c)[Fe(CN)6]4−(iii)4.90 BM
(d)[Fe(H2O)6]2+(iv)1.73 BM

Choose the correct answer from the options given below.

The molar conductivity of 0.007 M acetic acid is 20 S cm2 mol−1. What is the dissociation constant of acetic acid? Choose the correct option. 

In which one of the following arrangements the given sequence is not strictly according to the properties indicated against it

The slope of Arrhenius Plot (ln k v/s \(\frac{1}{T}\)) of first order reaction is −5×103 K. The value of Ea of the reaction is. Choose the correct option for your answer. [Given R=8.314 JK−1mol−1 ]

The dihedral angle of the least stable conformer of ethane is

BF3 is planar and electron-deficient compound. Hybridization and the number of electrons around the central atom, respectively are

Identify the compound that will react with Hinsberg’s reagent to give a solid which dissolves in alkali

Among the following alkaline earth metal halides, one which is covalent and soluble in organic solvents is

The maximum temperature that can be achieved in blast furnace is

Match List - I with List - II.

List - I

List - II 

(a)(i)Hell-VolhardZelinsky reaction
(b)(ii)Gattermann-Koch reaction
(c)(iii)Haloform reaction 
(d)(iv)Esterification

Choose the correct answer from the options given below.

Tritium, a radioactive isotope of hydrogen, emits which of the following particles?

The right option for the statement “Tyndall effect is exhibited by”, is

The incorrect statement among the following is

What is the IUPAC name of the organic compound formed in the following chemical reaction? 

Which of the following molecules is non-polar in nature

Which of the following reactions is the metal displacement reaction? Choose the right option.

Match List - I with List - II.  

List - IList - II
(a) 2SO2 (g)+O2 (g) →2SO3(i) Acid rain 
(b)HOCl(g) h\(^\nu\)→OH+Cl(ii) Smog
(c)CaCO3+H2SO4→CaSO4+H2O+CO2(iii)Ozone
(d)NO2(g) \(^{h\nu}\)→NO(g)+O(g)(iv) Tropospheric

Choose the correct answer from the options given below.

The product formed in the following chemical reaction is:

chemical reaction

Given that molar conductances for \(Ba(OH)_2\), \(BaCl_2\) and \(NH_4Cl\) are 523.28, 280.0 and 129.8 \( \Omega^{-1}cm^2mol^{-1} \), respectively. What is the molar conductivity \( \Lambda \) of \(NH_4OH\) at this temperature will be:
Which of the following pairs has both the ions coloured in aqueous solution? [Atomic numbers of Sc = 21, Ti = 22, Ni = 28, Cu = 29, Mn = 25]
A cooking gas contains carbon and hydrogen only. A volume of 11.2 L of this gas is found to weigh 22 g at STP. Then the molecular formula of the gas is

Consider a helium (He) atom that absorbs a photon of wavelength 330 nm. The change in the velocity (in cm s-1) of the He atom after the photon absorption is_____.
(Assume: Momentum is conserved when the photon is absorbed.
Use: Planck constant = 6.6 × 10-34 J s, Avogadro number = 6 × 1023 mol-1, Molar mass of He = 4 g mol-1)