HSC Science (Electronics) 11th Standard - Maharashtra State Board Question Bank Solutions

Balance the following reaction by oxidation number method.

\[\ce{Cr2O^2-_{7(aq)} + SO^2-_{3(aq)}->Cr^3+_{ (aq)} + SO^2-_{4(aq)}(acidic)}\]

Balance the following reaction by oxidation number method.

\[\ce{MnO^-_{4(aq)} + Br^-_{ (aq)}->MnO2_{ (s)} + BrO^-_{3(aq)}(basic)}\]

Balance the following reaction by oxidation number method.

\[\ce{H2SO4_{(aq)} + C_{(s)} -> CO2_{(g)}  + SO2_{(g)} + H2O_{(l)}(acidic)}\]

Balance the following reaction by oxidation number method.

\[\ce{Bi(OH)_{3(s)} + Sn(OH)^-_{3(aq)}->Bi_{(s)}  + Sn(OH)^2-_{6(aq)}(basic)}\]

Balance the following redox equation by half-reaction method.

\[\ce{H2C2O_{4(aq)} + MnO^-_{4(aq)}->CO2_{(g)} + Mn^2+_{( aq)}(acidic)}\]

Balance the following redox equation by half-reaction method.

\[\ce{Bi(OH)_{3(s)} + SnO^2-_{2(aq)}->SnO^2-_{3(aq)} + Bi^_{(s)}(basic)}\]

Write the outer electronic configuration of the following using the orbital notation method. Justify.

Ge (belongs to period 4 and group 14)

Write the outer electronic configuration of the following using the orbital notation method. Justify.

Po (belongs to period 6 and group 16)

Write the outer electronic configuration of the following using the orbital notation method. Justify.

Cu (belongs to period 4 and group 11)

Answer the following.

La belongs to group 3 while Hg belongs to group 12 and both belong to period 6 of the periodic table. Write down the general outer electronic configuration of the ten elements from La to Hg together using the orbital notation method.

Find out all the functional groups present in the following polyfunctional compound.

Thyroxine, the principal thyroid hormone.

Find out all the functional groups present in the following polyfunctional compound.

Penicillin G, a naturally occurring antibiotic.

Identify primary, secondary, tertiary, and quaternary carbon in the following compound.

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

Identify primary, secondary, tertiary and quaternary carbon in the following compound.

Answer the following question.

The electronic configuration of some element is given below:

1s² 2s² 2p⁶

In which group and period of the periodic table the element is placed?

Answer the following question.

The electronic configuration of some element is given below:

1s²

In which group and period of the periodic table the element is placed?

What is meant by homologous series?

Write the first four members of the homologous series that begins with CH₃CHO. Also, write down their general molecular formula.

Write the first four members of the homologous series that begins with H-C≡C-H. Also, write down their general molecular formula.

Answer the following question.

For s-block and p-block elements show that the number of valence electrons is equal to its group number.