Science (English Medium) कक्षा १२ - CBSE Question Bank Solutions for Chemistry

Draw all the isomers (geometrical and optical) of [Co(NH₃)₂Cl₂(en)]⁺.

Write all the geometrical isomers of [Pt(NH₃)(Br)(Cl)(py)] and how many of these will exhibit optical isomers?

Write the names of monomers of the following polymers.

Write the names of monomers of the following polymers:

Write the names of monomer of the following polymer:

How can you differentiate between addition and condensation polymerisation?

How is dacron obtained from ethylene glycol and terephthalic acid?

What is glycogen? How is it different from starch?

What is the basic structural difference between starch and cellulose?

Write reactions of the final alkylation product of aniline with excess of methyl iodide in the presence of sodium carbonate solution.

Write chemical reaction of aniline with benzoyl chloride and write the name of the product obtained. 

Write structures of different isomers corresponding to the molecular formula C₃H₉N. Write the IUPAC names of the isomers which will liberate nitrogen gas on treatment with nitrous acid.

Arrange the following compounds in increasing order of their boiling points.

CH₃CHO, CH₃CH₂OH, CH₃OCH₃, CH₃CH₂CH₃

Give the structure of the product you would expect when the following alcohol reacts with HCl–ZnCl₂.

Butan-1-ol

Give two reactions that show the acidic nature of phenol.

Explain how does the −OH group attached to a carbon of benzene ring activate it towards electrophilic substitution?

Which alkyl halide from the following pair would you expect to react more rapidly by an S_N2 mechanism? Explain your answer.

CH₃CH₂CH₂CH₂Br or \[\begin{array}{cc}
\ce{CH3CH2CHCH3}\\
\phantom{...}|\\
\phantom{....}\ce{Br}\ 
\end{array}\]

In the following pair of halogen compounds, which compound undergoes a faster S_N1 reaction?

In the following pair of halogen compounds, which compound undergoes a faster S_N1 reaction?

Write the isomers of the compound having the formula C₄H₉Br.