HSC Science (Electronics) 12th Standard Board Exam - Maharashtra State Board Question Bank Solutions

Answer the following.

Write the structure of isoprene and the polymer obtained from it.

Identify the chiral molecule from the following.

Identify chiral molecule/s from the following.

a.

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

b.

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

\[\ce{CH3 - CH2 - CH2 - CH2Br}\]

d.

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

Identify the chiral molecule from the following.

Identify chiral molecule/s from the following.

a.

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

b.

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

c.

\[\ce{CH3 - CH - CH2 - CH2Br}\]

d.

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

Identify the chiral molecule from the following.

Identify the chiral molecule from the following.

Identify chiral molecules from the following

a.

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

b.

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

c.

\[\begin{array}{cc}
\ce{CH3 - CH2 - CH2 - CH2Br}
\end{array}\]

d.

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

Name and draw the structure of the repeating unit in natural rubber.

Write the structure of isoprene and the polymer obtained from it.

Identify the chiral molecule from the following.

Identify chiral molecule/s from the following.

a.

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

b.

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

c.

\[\ce{CH3 - CH2 - CH2 - CH2 Br}\]

d.

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

How will you represent first order reactions graphically?

What are ideal and non-ideal solutions?

Why are aliphatic amines are stronger bases than ammonia?

Name the compound which reacts with formaldehyde to produce ethyl alcohol.

What is aqua regia?

A solution is prepared by mixing equal volumes of 0.1 M MgC1₂ and 0.3 M Na₂C₂O₄ at 293 K. Will MgC₂O₄ precipitate out?  (K_sp of MgC₂O₄ at 293K is 8.56 × 10^-5)

What is dextrorotatory substance?

What is base centred (or end-centred) unit cell?