Download App

Alcohols, Phenols and Ethers — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryAlcohols, Phenols and Ethers5 Marks
Question
Explain the oxidation of primary, secondary and tertiary alcohols.
✓

Answer

self

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "5 Marks Questions" from Alcohols, Phenols and Ethers→Alcohols, Phenols and Ethers — all question types→Chemistry STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

Explain the methods of preparation of aromatic aldehydes (benzoic aldehyde) from aromatic hydrocarbons.
→
  1. A blackish brown coloured solid ‘A’ when fused with alkali metal hydroxides in presence of air, produces a dark green coloured compound ‘B’, which on electrolytic oxidation in alkaline medium gives a dark purple coloured compound C. Identify A, B and C and write the reactions involved.
  2. What happens when an acidic solution of the green compound (B) is allowed to stand for some time? Give the equation involved. What is this type of reaction called?
→
Match the solutions given in Column I and the colours given in Column II.
 
Column I
(Aqueous solution of salt)
 
Column II
(Colour)
(i)
FeSO4.7H2O
(a)
Green
(ii)
NiCl2.4H2O
(b)
Light pink
(iii)
MnCl2.4H2O
(c)
Blue
(iv)
CoCl2.6H2O
(d)
Pale green
(v)
Cu2Cl2
(e)
Pink
 
 
(f)
Colourless
→
Differentiate between $1^{\circ}, 2^{\circ}$ and $3^{\circ}$ alcohols by catalytic dehydrogenation.
→
  1. How do you prepare:
  1. K2MnO4 from MnO2?
  2. Na2Cr2O7 form Na2CrO4?
  1. Account for the following:
  1. Mn2+ is more stable than Fe2+ towards oxidation to +3 state.
  2. The enthalpy of atomization is lowest for Zn in 3d series of the transition elements.
  3. Actinoid elements show wide range of oxidation states.
→
  1. Explain the following:
  1. Henry's law about dissolution of a gas in a liquid.
  2. Boiling point elevation constant for a solvent.
  1. A solution of glycerol (C3H8O3) in water was prepared by dissolving some glycerol in 500 g of water. This solution has a boiling point of 100.42°C. What mass of glycerol was dissolved to make this solution? (Kb for water = 0.512 K kg mol–1).
→
  1. Define the following terms:
  1. Mole fraction.
  2. Van’t Hoff factor.
  1. 100 mg of a protein is dissolved in enough water to make 10.0 mL of a solution. If this solution has an osmotic pressure of 13.3 mm Hg at 25° C, what is the molar mass of protein?

(R = 0.0821 L atm mol–1 K–1 and 760 mm Hg = 1 atm.)

→
  1. Complete the following chemical equations:
  1. $ \text{MnO}_{4}^{-}\text{(aq)}+\text{S}_{2}\text{O}_{4}\text{(aq)}+\text{H}_{2}\text{O}\text{(l)}\rightarrow$
  2. $\text{Cr}_{2}\text{O}_{4}^{2-}\text{(aq)}+\text{Fe}^{2+}\text{(aq)}+\text{H}^{+}\text{(aq)}\rightarrow$
  1. Explain the following observations:
  1. La3+ (Z = 57) and Lu3+ (Z = 71) do not show any colour in solutions.
  2. Among the divalent cations in the first series of transition elements, manganese exhibits the maximum paramagnetism.
  3. Cu+ ion is not known in aqueous solutions.

 

→
  1. Define the following terms:
  1. Mole fraction.
  2. Ideal solution.
  1. 15.0 g of an unknown molecular material is dissolved in 450 g of water. The resulting solution freezes at - 0.34°C. What is the molar mass of the material?

(Kf for water = 1.86 K kg mol–1).

→
Answer the following questions:
Give reasons:
  1. d-block elements exhibit more oxidation states than f-block elements.
  2. Orange solution of potassium dichromate turns yellow on adding sodium hydroxide to it.
  3. Zirconium (Z = 40) and Hafnium (Z = 72) have almost similar atomic radii.
→