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

Which one of the following produces acyl halide by treatment with PCl₅?

Picric acid is ____________.

When phenol is treated with excess bromine water, it gives:

When phenol is heated with CHCl₃ and alcoholic KOH when salicylaldehyde is produced. This reaction is known as ____________.

On distilling phenol with Zn dust, one gets:

Which of the following carbohydrates are branched polymers of glucose?

(i) Amylose

(ii) Amylopectin

(iii) Cellulose

(iv) Glycogen

In the reaction of phenol with CHCl₃ and aqueous NaOH at 343 K, the electrophile attacking the ring is:

When Phenol is distilled with zinc dust, it gives:

The electrophile involved in Reimer-Tiemann reaction of phenol with CHCl₃ in presence of NaOH:

Which of the following species can act as the strongest base?

\[\ce{C2H5OH + SOCl2 ->[Pyridine] C2H5Cl + SO2 + HCl}\]

The above reaction is known as:

Which of the following reactions is used to prepare salicylaldehyde?

Phenol does not undergo nucleophilic substitution reaction easily due to ______.

What would be the reactant and reagent used to obtain 2, 4-dimethyl pentan-3-ol?

Two beakers of capacity 500 mL were taken. One of these beakers, labelled as “A”, was filled with 400 mL water whereas the beaker labelled “B” was filled with 400 mL of 2 M solution of NaCl. At the same temperature both the beakers were placed in closed containers of same material and same capacity as shown in figure.

At a given temperature, which of the following statement is correct about the vapour pressure of pure water and that of NaCl solution.

For a binary ideal liquid solution, the variation in total vapour pressure versus composition of solution is given by which of the curves?

Why is the vapour pressure of an aqueous solution of glucose lower than that of water?

Which of the statements about solutions of electrolytes is not correct?