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

Write one difference in Solution and Colloid

How many electrons flow through a metllic wire if a current of 0·5 A is passed for 2 hours? (Given : 1 F = 96,500 C mol⁻¹)

Give simple chemical tests to distinguish between the following pairs of compounds:

Butanal and Butan-2-one

How will you convert the following in not more than two steps:

Ethanoic acid to 2-Hydroxyethanoic acid

What are isotonic solutions? Explain with one example.

Draw the structure of major monohalo product in each of the following reactions :

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

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

Define the following term:

Fuel cell

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

What is the role of activated charcoal in a gas mask? 

What is the role of activated charcoal in gas masks?

E°_cell for the given redox reaction is 2.71 V
Mg_(s) + Cu²⁺ _{(0.01 M)} → Mg²⁺ (0.001 M) + Cu_(s)

Calculate E_cell for the reaction. Write the direction of flow of current when an external opposite potential applied is
(i) less than 2.71 V and
(ii) greater than 2.71 V

Which among the following is not an example of amorphous solids?

Amorphous solids are also known as ____________.

Example of solution of liquid in gas is ____________.

4d transition elements series are from ____________.

IUPAC name of CH₃CHO is ____________.

Give IUPAC names of the following compound:

CH₃CH₂CH₂CH(Br)CH(CH₃)CH₂CHO

Give the IUPAC name of the following compound:

\[\begin{array}{cc}
\phantom{.................}\ce{Br}\phantom{....}\ce{CH3}\phantom{.........}\ce{O}\phantom{...}\\
\phantom{................}|\phantom{......}|\phantom{............}||\phantom{..}\\
\ce{CH3 - CH2 - CH2CH - CH - CH2 - C - H}
\end{array}\]