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

Write the structure of the major organic product in the following reaction:

\[\ce{CH3CH2CH = CH2 + HBr->[peroxide]}\]

Write the structure of the major organic product in the following reaction:

\[\ce{CH3CH = C(CH3)2 + HBr ->}\]

Primary alkyl halide C₄H₉Br (a) reacted with alcoholic KOH to give compound (b). Compound (b) is reacted with HBr to give (c) which is an isomer of (a). When (a) is reacted with sodium metal it gives compound (d), C₈H₁₈ which is different from the compound formed when n-butyl bromide is reacted with sodium. Give the structural formula of (a) and write the equations for all the reactions.

How the following conversion can be carried out?

Propene to propan-1-ol

How the following conversion can be carried out?

Benzyl alcohol to 2-phenylethanoic acid

How the following conversion can be carried out?

2-Methyl-1-propene to 2-chloro-2-methylpropane

How the following conversion can be carried out?

But-1-ene to n-butyliodide

Write the formula of an oxo-anion of Manganese (Mn) in which it shows the oxidation state equal to its group number.

What is the role of depressants in the froth floatation process?

Complete the following equations:

`2MnO_4^(-)+16H^++5S^(2-)rarr`

How will you convert: Phenol to 2, 4, 6 − trinitrophenol?

Write the fomulae of the following compounds :

Tetraaquodichlorochromium (III) chloride

Write the fomulae of the following compounds

Potassium tetracyanoaurate (III) ion

Write the product when D-glucose reacts with conc. HNO₃.

Arrange the following in the increasing order of their pK_b values:

C₆H₅NH₂, C₂H₅NH₂, C₆H₅NHCH₃

Name the reagents used in the following reactions:

Complete the following equation :

Write the structures of A, B and C in the following reactions :

A first order reaction takes 10 minutes for 25% decomposition. Calculate t_1/2 for the reaction.

(Given : log 2 = 0.3010, log 3 = 0.4771, log 4 = 0.6021)