List of top Chemistry Questions

For the following question, enter the correct numerical value upto TWO decimal places. If the numerical value has more than two decimal places, round-off the value to TWO decimal places. (For example: Numeric value 5 will be written as 5.00 and 2.346 will be written as 2.35) 75% of a first order reaction is completed in 32 minutes. 50% of the reaction would have been completed in ______ minutes.
Haemoglobin of the blood forms carboxyhaemoglobin with
Heterolytic fission of an organic covalent bond gives only
Which of the following order is true regarding the acidic nature of phenol?
On ozonolysis 2-methyl-2-butene gives
$sp^3d^2$ hybridisation is present in
Huckel's rule of aromaticity is
Ellingham diagram represents
Which of the following gives apple green colour to the Bunsen flame?
The pair of xenon compounds which have the same number of lone pairs of electrons on the central atom is
Bohr Magneton value in S.I. units is
The correct order of decreasing acid strength of oxy-acids of group 15 elements is
Which of the following equations denotes that H$_2$O$_2$ acts as a reducing agent?
Which of the following is the correct order of electron affinity?
The incorrect electronic arrangement is
If PCl$_5$ is heated in two separate vessels of volume 5 L and 10 L respectively at 27$^\circ$C, the extent of dissociation of PCl$_5$ will be
Milk is an example of
A molecule AX$_2$ has two lone pairs over A. Its shape is
A solid has a structure in which W atoms are located at the corners of the unit cell, O atoms are located at the cube edges, and Na atoms at the cube centre. The formula of the compound is:
The empirical formula of a compound is CH$_2$O. If 0.0835 moles of the compound contain 1 g of hydrogen, the molecular formula of the compound is
Which of the following condition is correct for reverse osmosis?
An element $ X $ (atomic number 13) forms a complex of the type $[XCl(H_2O)_5]^{2+}$. What are the covalency and oxidation state of $ X $ in this complex?
Aluminium chloride in acidified aqueous solution gives a complex ion 'X'. The hybridization of central atom in X is
Assertion (A): MgSO4 is readily soluble in water.
Reason (R): The greater hydration enthalpy of Mg2+ ions overcomes its lattice enthalpy.

Which of the following are extensive properties?
\(Heat capacity \quad (B) Entropy \quad (C) Gibbs Energy \quad (D) Concentration \quad (E) Vapour pressure\)