HSC Science (General) १२ वीं कक्षा - Maharashtra State Board Question Bank Solutions for Chemistry

Answer the following.

Write structural formula of the following synthetic rubbers:

SBR rubber

Answer the following.

Write structural formula of the following synthetic rubbers:

Buna-N rubber

Answer the following.

Write structural formula of the following synthetic rubbers:

Neoprene rubber 

Answer the following

Write diazotisation reaction of aniline?

The effective atomic number of cobalt in [Co(NH₃)₆]³⁺ is _____________

Calculate effective atomic number of iron in [Fe(CN)₆]⁴⁻ complex ion

Write formula to calculate EAN with the significance of terms involved in it. Calculate EAN of [Fe(CN)₆]^3–.

Write oxidation state and coordination number of [Co(NH₃)₄Cl₂]⁺ ion. Calculate EAN of iron in [Fe(CN)₆]^4–. Write the IUPAC name of [Zn(NH₃)₄]²⁺.

Propane nitrile can be prepared by heating ____________

The following will react faster by S_N1 mechanism

Major product of the following reaction is _______________

\[\ce{CH3-CH2-Mg-Br + NH3 ->?}\]

Nucleophilic substitution reaction of 2, 4-dinitrochlorobenzene is faster than p-nitrochlorobenzene. Give reason.

An octahedral void is surrounded by ________.

The coordination number of spheres in the hcp lattice in three dimension is ______.

Write the correct order of increasing ease of dehydrohalogenation.

\[\ce{\underset{\text{(I)}}{CH3 - CH2 - CH2 - Cl}}\]

\[\ce{\underset{\text{(II)}}{CH3 - CH(Cl) - CH3}}\]

\[\begin{array}{cc}
\ce{CH3}\\
|\\
\ce{CH3-C-Cl}\phantom{...}\\
|\\
\ce{CH3}\\
\ce{(III)}
\end{array}\]

Explain. Aryl halides are less reactive than alkyl halides towards nucleophilic substitution reactions.

The number of tetrahedral voids are formed if the number of atoms in a crystal is N/2.

Explain primary benzylic halide shows higher reactivity by S_N1 mechanism than other primary alkyl halide.

The number of octahedral voids formed in 0.5 mol of a compound forming hcp structure?

Explain the factors affecting S_N1 and S_N2 mechanism.