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

Indicate the type of isomerism exhibited by the following complex and draw the structure for the isomer:

\[\ce{[Pt(NH3 )(H2O)Cl2]}\]

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

2-Methylbutan-2-ol

Give the structure of the product you would expect when the following alcohol reacts with HBr.

Butan-1-ol

Give the structure of the product you would expect when the following alcohol reacts with HBr.

2-Methylbutan-2-ol

Give the structure of the product you would expect when the following alcohol reacts with SOCl₂.

Butan-1-ol

Give the structure of the product you would expect when the following alcohol reacts with SOCl₂.

2-Methylbutan-2-ol

Compare acidity of phenol with that of ethanol.

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

\[\begin{array}{cc}\ce{CH3CH2CHCH3}\\\phantom{...}|\\\phantom{....}\ce{Br}\end{array}\] or \[\begin{array}{cc}\phantom{.....}\ce{CH3}\\\phantom{..}|\\\ce{H3C - C - Br}\\\phantom{..}|\\\phantom{....}\ce{CH3}\end{array}\]

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

\[\begin{array}{cc}\ce{CH3CHCH2CH2Br}\\|\phantom{.........}\\\ce{CH3}\phantom{......}\end{array}\] or \[\begin{array}{cc}\ce{CH3CH2CHCH2Br}\\\phantom{}|\\\phantom{...}\ce{CH3}\end{array}\]

Which one of the following is a food preservative? 

Equanil, Morphine, Sodium benzoate

The complex ion `[Co(H_2O)_5 (ONO)]^(2+) `

(A) linkage isomer

(B) ionisation isomer

(C) co-ordination isomer

(D) geometrical isomer

Write the chemical equations involved in the following reactions:

Carbylamine reaction

Write the final product(s) in each of the following reactions:

How do you convert: 

2-bromobutane to but-2-ene

Arrange the following in the increasing order of their reactivity towards nucleophilic addition reaction:

C₆H₅COCH₃, CH₃-CHO, CH₃COCH₃

Write the main products when n-butyl chloride is treated with alcoholic KOH.

Give reasons for the following:

o-nitrophenol is more acidic than o-methoxyphenol.

Predict the products of the following reactions:

Seeing the growing cases of diabetes and depression among young children, Mr Lugani, the principal of one reputed school, organised a seminar in which he invites parents and principals. They all resolved this issue by strictly banning junk food in schools and introducing healthy snacks and drinks like soup, lassi, milk etc. in school canteens. They also decided to make compulsory half an hour of daily physical activities for the students in the health survey in most of the school and discovered a tremendous improvement in the health of the students

After reading the above passage, answer the following questions:

(i) What are the values (at least two) displayed by Mr Lugani?

(ii) As a student, how can you spread awareness about this issue?

(iii) What are antidepressant drugs? Give an example.

(iv) Name the sweetening agent used in the preparation of sweets for a diabetic patient.

Write the mechanism of the following reaction: