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

Which of the following occurs in a liquid state at room temperature?

Select appropriate answers for the following.

In pyrosulfuric acid oxidation state of sulfur is _______.

The correct order of increasing reactivity of C-X bond towards nucleophile in the following compounds is:

(I)

(II)

(III) (CH₃)₃ C-X

(IV) (CH₃)₂ CH-X

\[\ce{CH3 - CH = CH2 ->[HI][Peroxide]}\]

The major product of the above reaction is,

Choose the most correct option.

The best method for the preparation of alkyl fluorides is _______.

Butanenitrile may be prepared by heating ______.

Choose the most correct option.

Choose the compound from the following that will react fastest by S_N1 mechanism

The product ‘B’ in the above reaction sequence is,

Choose the most correct option.

Which of the following is likely to undergo racemization during alkaline hydrolysis?

(I)

\[\begin{array}{cc}
\ce{CH3-CH-C2H5}\\
|\\
\ce{Cl}\end{array}\]

(II)

(III) 

(IV)

\[\begin{array}{cc}
\ce{\phantom{.......}CH3}\\
\phantom{.....}|\\
\ce{CH3-CH}\\
\phantom{.....}|\\
\ce{\phantom{..........}CH2Cl}
\end{array}\]

Match the pairs.

Choose the most correct option.

The hybridisation of nitrogen in primary amine is ____________.

Isobutylamine is an example of ______.

Choose the most correct option.

Which type of amine does produce N₂ when treated with HNO₂?

Choose the most correct option.

Carbylamine test is given by ____________.

Choose the most correct option.

Identify ‘B’ in the following reactions

\[\ce{CH3 - C ≡ N ->[Na/C2H5OH] A ->[NaNO2/dilHCl]B}\]

\[\ce{CH2OH-CO-(CHOH)4-CH2OH}\] is an example of ______.

Select the most correct choice.

Open chain formula of glucose does not contain ______.

Which of the following does not apply to \[\ce{CH2NH2-COOH}\]?

Select the most correct choice.

Tryptophan is called essential amino acid because

Select the most correct choice.

A disulphide link gives rise to the following structure of a protein.