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

According to Henry’s law, the amount of gas that will dissolve in blood plasma or any other liquid is determined by which of these factors?

Henry’s law constant of oxygen is 1.4 × 10^–3 mol lit^–1 atm^–1 at 298 K. How much of oxygen is dissolved in 100 ml at 298 K when the partial pressure of oxygen is 0.5 atm?

Low concentration of oxygen in the blood and tissues of people living at high altitude is due to ______.

The value of Henry's constant K_H is ______.

Which of the following factor(s) affect the solubility of a gaseous solute in the fixed volume of liquid solvent?

(a) nature of solute

(b) temperature

(c) pressure

(i) (a) and (c) at constant T

(ii) (a) and (b) at constant P

(iii) (b) and (c) only

(iv) (c) only

Sodium salt of benzene sulphonic acid on fusion with caustic soda gives ____________.

Which of the following will not form phenol or phenoxide?

Which of the following statements is incorrect regarding glucose?

The symbols D and L represents ____________.

Which one of the following compounds is different from the rest?

When glucose reacts with bromine water, the main product is ____________.

Glucose does not react with ____________.

Glucose reacts with acetic anhydride to form ______.

Which of the following properties of glucose cannot be explained by its open chain structure?

(i) Glucose does not form hydrogen sulphite with NaHSO₃.

(ii) On oxidation with HNO₃ glucose gives saccharic acid.

(iii) Glucose is found to exist in two different crystalline forms which are named as α and β.

Glucose is found to exist in two different α and β crystalline forms. These forms can be obtained by:

(i) The α form of glucose is obtained by crystallisation from a concentrated solution of glucose at 303 K.

(ii) The β form of glucose is obtained by crystallisation from a concentrated solution of glucose at 303 K.

(iii) The β form is obtained by crystallisation from hot and saturated aqueous solution at 371 K.

(iv) The α form is obtained by crystallisation from hot and saturated aqueous solution at 371 K.

Reduction of glucose by HI suggest that ____________.

The reaction of glucose with red P + HI is called ____________.

Which of the following reactions of glucose can be explained only by its cyclic structure?

Which is the least stable form of glucose?

A solution of D-glucose in water rotates the plane polarised light ____________.