List of top Chemistry Questions

For an endothermic reaction, $\Delta$H represents the enthalpy of the reaction in $kJ mol^{-1}$. The minimum amount of activation energy will be

Find out the magnitude of work done on the gas when 1 mole of an ideal gas undergoes compression from 9 liter to 1 liter through a reversible isothermal process. (in Joule) (Nearest integer)

Find the mass (in g) of O₂ required for the combustion of 900 g of glucose.

Which of the following compounds will not give Hinsberg's test

X ⇌ Y;K₁ = 1
Y ⇌ Z; K₂ = 2
Z ⇌ W; K₃ = 4
Find K_eq for X ⇌ W

CoCl₃.xNH₃ on reaction with excess AgNO₃(aq.) gives two moles of AgCl as precipitate.
Summation of oxidation state of Co in CoCl₃.xNH₃ and x is:

Statement-I : Stability of +1 oxidation state increases as Ga< In < Tl
Statement-II : Stability of +1 oxidation state increases down the group due to inert pair effect.

A solution contains 100 g water and 10 g of AB₂, The boiling of the solution was found to be 100.52% The degree of dissociation of AB₂ is: 
[MW of AB = 200 gm/mol ; K_b = 0.52 Kkg/mol

Find among the spin only magnetic moment (nearest integer) of M in MO₄^2-, M being the atom having least atomic radii among Sc, Ti, V, Cr, Mn, Zn.

Which of the following is not tetrahedral in shape ?

Which of the following statement is INCORRECT

How many of the following have zero dipole moment $H_2S, CH_4, NH_3, BF_3, SO_2, NF_3$

In an atom, how many electrons can have
(i) n = 4 (ii) m1 =1 (iii) ms = ½

Number of π bonds present in product B is:

Which of the following molecule is an acidic oxide?

Equanil drug is used for which disease?

Which postulate of Dalton's theory is wrong

Arrange the following carbocations in increasing order of their stability.
I) \((CH_3)_3C^{\oplus}\)
II) \((CH_3)_2\overset{{\oplus}}{C}H\)
III) \(\overset{{\oplus}}{C}H_3\)
IV) \(CH_3\overset{{\oplus}}{C}H_2\)

Sum of O atoms in A and B is ?

The molar conductivities of a divalent cation (M²⁺) and monovalent anion (A^-) are 57 S cm^-1 mol^-1 and 73 S cm^-1 mol^-1 respectively. Then find the total molar conductivity shown by their compound in S cm^-1 mol^-1

Consider the following statements:
Statement I: Stability of +1 oxidation state increases down the group in group-13.
Statement II: Atomic radius of Ga is greater than that of Al.

In which of the following compounds Mn has the highest oxidation state?

Which metal shows the highest and maximum number of oxidation states?

Identify the change occuring in oxidation state of Mn in cell reaction of dry cell of clock during its use

One litre solution of 0.2 M glucose is separated with its pure solvent with semi-permeable membrane, 0.1 moles of NaCl is added to the solution. The change in osmotic pressure of solution will be at 300 K _____ . (take R = 0.083)