Chemistry Question Bank

When zeolite (hydrated sodium aluminium silicate) is treated with hard water the sodium ions are exchanged with

Which of the following is not correct regarding the electrolytic preparation of H₂O₂?

H₂O₂ is obtained by which of the following?

Which of the following cannot be used as a test for H₂O₂ ?

Blackened oil painting can be restored into original form by the action of

Which of the following equation depicts reducing nature of H₂O₂?

What is the volume of “20 volume H₂O₂” required to get 5000 cm3 of oxygen at STP ?

The volume of oxygen liberated from 15 mL of 20 volume H₂O₂ is

A commercial sample of hydrogen peroxide is labelled as 10 volume. Its percentage strength is nearly

Assertion: Increasing pressure on pure water decreases its freezing point. Reason: Density of water is maximum at 4° C.

Assertion: Among the two OH bonds in H₂O molecule, the energy required to break the first OH bond and the other OH bond is same. Reason: This is because the electronic environment around oxygen is the same even after …

Assertion: Anhydrous BaO₂ (barium peroxide) is used for preparing H₂O₂. Reason: Hydrated BaO₂ is not available.

Assertion: In alkaline medium, H₂O₂ reacts with potassium ferricyanide. Reason : H₂O₂ is a strong reducing agent.

Assertion: Alkynes are more reactive towards nucleophilic addition reaction as compared to alkenes. Reason: Alkynes contain two pi bonds, while alkenes have only one bond.

Assertion:1-butene on reaction with HBr in the presence of a peroxide produces 1-bromobutane. Reason: It involves the formation of a primary radical.

Assertion: The addition of HBr on 2-butene gives two isomeric products. Reason: Addition of HBr on 2-butene follows Markownikoff’s rule.

For the formation of toluene by Friedal Craft reaction, reactants used in presence of anhydrous AlCl₃ are

Which among the following groups when attached to benzene ring will direct the incoming electrophile predominantly to the meta position? (I) – CH₃ (II) –CH₂Cl (III) (IV) –CCl₃ (V) –NHCOCH₃

Ethylbenzene with bromine in presence of FeBr₃, predominantly gives (a) (b) (c) (d)

An aromatic compound ‘X’ with molecular formula C₈H₁₀ on nitration gives one mononitro derivative and three dinitro derivatives. Compound ‘X’ would be

Which of the following sequence of reactions (reagents) can be used for the conversion of C₆H₅CH₂CH₃ into C₆H₅CH=CH₂?

Reduction of 2-butyne with sodium in liquid ammonia gives predominantly :

CH CH CH

A hydrocarbon A on chlorination gives B which on heating with alcoholic potassium hydroxide changes into another hydrocarbon C. The latter decolourises Baeyer's reagent and on ozonolysis forms formaldehyde only. A is

In the presence of platinum catalyst, hydrocarbon A adds hydrogen to form n-hexane. When hydrogen bromide is added to A instead of hydrogen, only a single bromo compound Is formed. Which of the following is A? (a) CH …