HSC Science (Electronics) १२ वीं कक्षा - Maharashtra State Board Question Bank Solutions for Chemistry

The unit of rate constant for zero order reaction is _______.

(A) t^–1

(B) mol dm^–3 t^–1

(C) mol^–1 dm³ t^–1

(D) mol^–2 dm⁶ t^–1

Define enzymes.

Which among the following reactions is an example of a zero order reaction?

a) `H_(2(g)) + I_(2(g)) -> 2HI_(g)`

b) `2H_2O_(2(l)) -> 2H_2O_(l) + O_(2(g))`

c) `C_12H_22O_(11(aq)) + H_2O_(l) -> C_6H_12O_(6(aq)) + C_6H_12O_(6(aq))`

d) `2NH_(3g)`   `N(2g) + 3H_(2(g))`

Define Freezing point.

3.795 g of sulphur is dissolved in 100g of CS₂. This solution boils at 319.81 K. What is the molecular formula of sulphur in solution? The boiling point of CS₂ is 319.45 K. (Given that K_b for CS₂ = 2.42 K kg mol^-1 and atomic mass of S = 32)

What is the action of following reagents on glucose?

bromine water

What is the action of following reagents on glucose?

dilute HNO₃

What is the action of following reagents on glucose?

hydroxyl amine

What is the action of Benzene Sulphonyl Chloride on primary, secondary and tertiary
amines?

Draw the structure of H₄P₂O₆ hypophosphoric acid

Stachyose is an example of _______.

(A) monosaccharides

(B) disaccharides

(C) trisaccharides

(D) tetrasaccharides

Draw a neat, labelled energy profile diagram for SN¹ reaction mechanism.

What is the action of nitrous acid on secondary nitroalkane?

What is the action of nitrous acid on tertiary nitroalkane

Write 'two' uses of phenol.

What happens when glucose is treated with Bromine water

What happens when glucose is treated with - Dilute nitric acid

What happens when glucose is treated with Hydrogen cyanite (HCN).

The half-life period of zero order reaction A → product is given by

(a) `([A]_0)/k`

(b) `0.693/k`

(c) `[A]_0/(2k)`

(d) `(2[A]_0)/k`

Draw a neat and labelled diagram of the lead storage battery.