HOTs Alcohols Phenols and Ethers Class 12 Chemistry

MULTIPLE CHOICE QUESTIONS (MCQs) Question. Which of the following alcohol is most soluble in water(a) Propanol(b) Hexanol(c) Pentanol(d) Butanol Question. Which one of the following compound is obtained by dehydrogenation of secondary alcohols?(a) Ketone(b) Aldehyde(c) Carboxylic acid(d) Amine Question. Ethyl alcohol obtained by fermentation of starch is called wash and what is its purity?(a) 15%(b) […]

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HOTs Solutions Class 12 Chemistry

(MULTIPLE CHOICE QUESTION) Question. Low concentration of oxygen in the blood and tissues of people living at high altitude is due to ____________.a. low temperatureb. low atmospheric pressurec. high atmospheric pressured. both low temperature and high atmospheric pressure Question. At equilibrium the rate of dissolution of a solid solute in a volatile liquid solvent is […]

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HOTs The d – and f – Block Elements Class 12 Chemistry

Question. Highest oxidation state of manganese in fluoride is +4 (MnF4) but highest oxidation state in oxides is +7 (Mn2O7) because(a) fluorine is more electronegative than oxygen(b) fluorine does not possess d-orbitals(c) fluorine stabilises lower oxidation state(d) in covalent compounds, fluorine can form single bond only while oxygen forms double bond. Question. Which of the […]

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HOTs Surface Chemistry Class 12 Chemistry

Question. Which of the following statements is not correct for chemisorption and physisorption?(a) Physisorption and chemisorption are both exothermic processes.(b) Magnitude of chemisorption is favourable at low temperature while physisorption is favourable at high temperature.(c) Chemisorption is irreversible and physisorption is reversible.(d) In physisorption activation energy is low while in chemisorption it is high. Question. […]

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HOTs Biomolecules Class 12 Chemistry

Question. Choose the correct relationship for glucose and fructose(a) these are functional isomers(b) these are chain isomers(c) these are position isomers(d) All of these Question. The sugar that is characteristic of milk is(a) maltose(b) ribose(c) lactose(d) galactose Question. Glucose reacts with acetic anhydride to form(a) monoacetate(b) tetra-acetate(c) penta-acetate(d) hexa-acetate Question. Which of the following monosaccharide […]

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HOTs Amines Class 12 Chemistry

Question. Which of the following methods of preparation of amines will give same number of carbon atoms in the chain of amines as in the reactant?(a) Reaction of nitrite with LiAlH4.(b) Reaction of amide with LiAlH4 followed by treatment with water.(c) Heating alkylhalide with potassium salt of phthalimide followed by hydrolysis.(d) Treatment of amide with […]

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