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

Write two factors that affect the rate of reaction.

For a reaction A + B ⟶ P, the rate is given by

Rate = k [A] [B]²

How is the rate of reaction affected if the concentration of B is doubled?

For a reaction A + B ⟶ P, the rate is given by

Rate = k [A] [B]²

What is the overall order of reaction if A is present in large excess?

For a reaction : 

(i) Write the order and molecularity of this reaction.

(ii) Write the unit of k.

Account for the following : Nitrogen does not form pentahalide.

For the hydrolysis of methyl acetate in aqueous solution, the following results were obtained :

(i) Show that it follows pseudo first order reaction, as the concentration of water remains constant.

(ii) Calculate the average rate of reaction between the time interval 30 to 60 seconds.

(Given log 2 = 0.3010, log 4 = 0.6021)

The following data were obtained during the first order thermal decomposition of SO₂Cl₂ at a constant volume :

SO₂Cl₂ (g) → SO₂ (g) + Cl₂ (g)

Calculate the rate constant.

(Given : log 4 = 0.6021, log 2 = 0.3010)

Define the following term:

Essential amino acids

MnO₂ and Ca₃(PO₄)₂ present in iron ore get reduced to Mn and P in the zone of _______.

(A) combustion

(B) reduction

(C) fusion

(D) slag formation

Explain the given terms: Homopolymers

Give IUPAC name of :

Write the different oxidation states of iron

Distinguish between isothermal process and adiabatic process.

Explain, why lanthanum (Z = 57) forms La³⁺ ion, while cerium (Z = 58) forms Ce⁴⁺ ion?

Which one of the following oxidation state of Manganese is unstable?

(a) + 2

(b) + 4

(c) + 5

(d) + 7

What are the sources of Vitamin C and Vitamin K?

How are the following conversions carried out?

2-methylbutan-1-ol into 2 -methylbutanoic acid.

Write two uses of formaldehyde

Define isotonic solutions.

When KOH solution is added to potassium dichromate solution the colour of solution
changes to yellow, because _______

(A) chromate ion changes to dichromate ion

(B) dichromate ion changes to chromate ion

(C) oxidation number of chromium changes from + 6 to + 4

(D) oxidation number of chromium changes from + 4 to +6