List of top Chemistry Questions

If in the case of a radio-isotope, the value of half-life(T_1/2) and decay constant(λ) are identical in magnitude, then their value should be

Na₂CO₃ is prepared by Solvay process but K₂CO₃ can not be prepared by the same because

Which of the following would give a linear plot? (K is the rate constant of an elementary reaction and T is the temperature in absolute scale)

For the reaction A+B\(\rightarrow\)C, we have the following data:

Initial concentration of A(in molarity)	Initial concentration of B (in molarity)	Rate(initial)(Relevant unit)
1	10	100
1	1	1
10	1	10

The order of the reaction with respect to A and B are:

The equivalent conductance of NaCl, HCl, and CH₃COONa at infinite dilution are 126.45, 426.16, and 91 ohm^-1cm²eq^-1 respectively at 25°C. The equivalent conductance of acetic acid(at infinite dilution) would be

Arrange the following in order of increasing mass :
(i) 1 mole of N₂, (ii) 0.5 mole of O₃, (iii) \(3.011×10^{23}\) molecules of O₂, (iv) 0.5 gram atom of O₂

The root mean square(rms) speed of X₂ gas is x m/s at a given temperature. When the temperature is doubled, the X₂ molecules dissociated completely into atoms. The root mean square speed of the sample of gas then becomes (in m/s)

What is the edge length of the unit cell of a body-centred cubic crystal of an element whose atomic radius is 75 pm?

In the reaction :

Formation of X, formation of Y and Z are known by

Which one of the following oxoacids of phosphorus can reduce AgNO₃ to metallic silver ?

The correct decreasing order of basicity of hydrides of Group - 15 elements is

Which of the following system in an octahedral complex has maximum unpaired electrons?

Which formula and name combination is INCORRECT ?

\(aMnO^{-}_4+bS_2O_{3}^-+H_2O\rightarrow xMnO_2+ySO_{4}^-+zOH^-\)
a and y respectively are

Which of the following is CORRECT with respect to melting point of a transition element?

In solid state, PCl₅ is a/an

For Freundlich adsorption isotherm, a graph of log (x/m) Vs. log (P) gives a straight line. The slope of line and its Y-axis intercept respectively are

Aqueous solution of raw sugar when passed over beds of animal charcoal, it becomes colourless. Pick the correct set of terminologies that can be used for the above example.

	Adsorbent	Adsorbate	Process
(1)	Solution of Sugar	Animal Charcoal	Soprtion
(2)	Animal Charcoal	Solution of Sugar	Absorption
(3)	Animal Charcoal	Colouring Substance	Adsorption
(4)	Colouring Substance	Animal Charcoal	Adsorption

Which of the following compound does not give dinitrogen on heating ?

For the formation of which compound in Ellingham diagram ΔG° becomes more and more negative with increase in temperature ?

When FeCl₃ is added to excess of hot water gives a sol ‘X’. When FeCl₃ is added to NaOH_(aq) solution, gives sol ‘Y’.
X and Y formed in the above processes respectively are

Consider the following 4 electrodes
A : Ag⁺ (0.0001 M)/Ag_(s) ;  B : Ag⁺ (0.1 M) / Ag_(s)
C : Ag⁺ (0.01 M)/Ag_(s) ;        D : Ag⁺ (0.001 M) / Ag_(s); \(E^{\degree}_{Ag^{+/Ag}}\)=+ 0.80 V
Then reduction potential in volts of the electrodes in the order

For a reaction, the value of rate constant at 300 K is 6.0 ×10⁵ s^-1. The value of Arrhenius factor A at infinitely high temperature is :