Science (English Medium) कक्षा १२ - CBSE Question Bank Solutions for Chemistry

Show that the time required for 99% completion is double of the time required for the completion of 90% reaction.

Which of the following isomers is more volatile:

o-nitrophenol or p-nitrophenol?

Complete the following chemical equations :

Cu + H₂SO₄(conc.) →

In reference to Freundlich adsorption isotherm, write the expression for adsorption of gases on solids in the form of an equation.

Glucose on reaction with HI gives n-hexane. What does it suggest about the structure of glucose?

Give the structures of A, B and C in the following reactions :

Calculate emf of the following cell at 298 K:

\[\ce{Mg_{(s)} | Mg^{2+} (0.1 M) || Cu^{2+} (0.01) | Cu_{(s)}}\]

[Given \[\ce{E^{\circ}_{cell}}\] = +2.71 V, 1 F = 96500 C mol^–1]

Name a member of the lanthanoid series that is well-known to exhibit +2 oxidation state.

Give the structures of A, B and C in the following reactions :

Give the structures of A, B and C in the following reactions :

Write the IUPAC name of the compound.

Write the principles of the following methods :

Froth floatation method

Write IUPAC name of the complex K3 [Cr (C₂O₄)3] 

Write the IUPAC name of the follow

\[\begin{array}\ce{\phantom{--..}O}\\\ce{\phantom{--..}||}\\ \ce{CH2=CH-C-CH3}\end{array}\]

Account for the following:
Gabriel phthalimide synthesis is not preferred for preparing aromatic primary amines.

 Write structures of compounds A and B in each of the following reactions:

Arrange the following polymers in increasing order of their intermolecular forces: 
Polyvinylchloride, Neoprene, Terylene

Differentiable between the following: 
Amylose and Amylopectin 

Account for the following : 
Manganese shows maximum number of oxidation states in 3d series. 

E⁰ value for  Mn³⁺ Mn²⁺ couple is much more positive than that for Cr^3-/ Cr^2-.