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

Match the items of Column I and Column II.

Assertion: E_Cell should have a positive value for the cell to function.

Reason: `"E"_("cathode") < "E"_("anode")`

Assertion: Mercury cell does not give steady potential.

Reason: In the cell reaction, ions are not involved in solution.

The term ‘sorption’ stands for ______.

Which one of the following is not applicable to the phenomenon of adsorption?

Which of the following is an example of absorption?

On the basis of data given below predict which of the following gases shows least adsorption on a definite amount of charcoal?

Which of the following process is not responsible for the presence of electric charge on the sol particles?

Which of the following phenomenon occurs when a chalk stick is dipped in ink?

(i) Adsorption of coloured substance.

(ii) Adsorption of solvent.

(iii) Absorption and adsorption both of solvent.

(iv) Absoprtion of solvent.

Which of the following statements are correct?

(i) A depressant prevents certain type of particle to come to the froth.

(ii) Copper matte contains \[\ce{Cu2S}\] and \[\ce{ZnS}\].

(iii) The solidified copper obtained from reverberatory furnace has blistered appearance due to evolution of \[\ce{SO2}\] during the extraction.

(iv) Zinc can be extracted by self-reduction.

What is the role of flux in metallurgical processes?

Identify the compound Y in the following reaction.

In which of the following molecules carbon atom marked with asterisk (*) is asymmetric?

(a) \[\begin{array}{cc}
\ce{H}\\
|\\
\phantom{.}\ce{C^*}\phantom{}\\
\phantom{}/\phantom{..}|\phantom{..}\backslash\phantom{}\\
\phantom{.}\ce{I}\phantom{...}\ce{Br}\phantom{..}\ce{Cl}
\end{array}\]

(b) \[\begin{array}{cc}
\ce{D}\\
|\\
\phantom{.}\ce{C^*}\phantom{}\\
\phantom{}/\phantom{..}|\phantom{..}\backslash\phantom{}\\
\phantom{.}\ce{I}\phantom{...}\ce{Br}\phantom{..}\ce{Cl}
\end{array}\]

(c) \[\begin{array}{cc}
\ce{H}\\
|\\
\phantom{.}\ce{C^*}\phantom{}\\
\phantom{}/\phantom{..}|\phantom{..}\backslash\phantom{}\\
\phantom{..}\ce{OH}\phantom{..}\ce{C2H5}\phantom{}\ce{CH3}
\end{array}\]

(d) \[\begin{array}{cc}
\ce{H}\\
|\\
\phantom{.}\ce{C^*}\phantom{}\\
\phantom{}/\phantom{..}|\phantom{..}\backslash\phantom{}\\
\phantom{..}\ce{H}\phantom{...}\ce{C2H5}\phantom{}\ce{CH3}
\end{array}\]

Which of the following structures is enantiomeric with the molecule (A) given below:

Which of the following is an example of vic-dihalide?

The position of \[\ce{-Br}\] in the compound in \[\ce{CH3CH = CH(Br)(CH3)2}\] can be classified as ______.

Ethylidene chloride is a/an ______.

Which is the correct IUPAC name for \[\begin{array}{cc}
\ce{CH3 - CH - CH2 - Br}\\
\phantom{}|\phantom{.......}\\
\phantom{}\ce{C2H5}\phantom{....}
\end{array}\]?

What should be the correct IUPAC name for diethylbromomethane?

The reaction of toluene with chlorine in the presence of iron and in the absence of light yields ______.