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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Complete the following reaction giving major product.

\[\begin{array}{cc}
\ce{CH3}\phantom{.................}\\
|\phantom{...................}\\
\ce{CH3 - C - CH2 - Cl ->[Na/dry ether] A}\\
|\phantom{...................}\\
\ce{CH3}\phantom{................}
\end{array}\]

Write the names and chemical formulae of any one ore of zinc.

Write the names and chemical formulae of any one ore of iron.

The process of leaching alumina, using sodium carbonate is called

• Bayer's process
• Decomposition
• Cyanide process
• Hall's process

On calculating the strength of current in amperes if a charge of 840C (coulomb) passes through an electrolyte in 7 minutes, it will be

• 1
• 2
• 3
• 4

Why is Sc³⁺ colourless while Ti³⁺ coloured? (Atomic number Sc = 21, Ti =22)