Science (English Medium) इयत्ता १२ - CBSE Question Bank Solutions

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: 

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 ____________.

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:

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

Give IUPAC names of the following compound:

The following compound is called:

CH₃CH(OCH₃)CHO is called:

Prop-2-enal is called ____________.

The following compound is called:

\[\begin{array}{cc}
\ce{CH3}\\
/\phantom{....}\\
\ce{CH3-N}\phantom{.............}\\
\backslash\phantom{....}\\
\phantom{.}\ce{CH3}
\end{array}\]

The following molecule is called as:

\[\begin{array}{cc}
\ce{CHO}\phantom{..}\\
|\phantom{......}\\
\ce{(CHOH)4}\\
|\phantom{......}\\
\ce{CH2OH}
\end{array}\]

Glycosidic linkage is found between ____________.

Assertion: Stability of a crystal is reflected in the magnitude of its melting.

Reason: The stability of a crystal depends upon the strength of the interparticle attractive force.

Most crystals show good cleavage because their atoms, ions or molecules are ____________.

“Crystalline solids are anisotropic in nature″. What is the meaning of anisotropic in the given statement?