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

Which among the following molecular formulae represents urotropine?

(a) C₆H₁₂N₄

(b) C₆H₂₄H₄                    

(c) C₆H₁₂N₄O₂

(d) C₆H₂4N₄O₂

What are chemical twins? Write ‘two’ examples.

What is the covalency of nitrogen in N₂O₅?

A reaction is second order in A and first order in B.

(i) Write the differential rate equation.

(ii) How is the rate affected on increasing the concentration of A three times?

(iii) How is the rate affected when the concentrations of both A and B are doubled?

Distinguish between crystalline solid and amorphous solid.

What is pseudo first order reaction? Give one· example of it.

which of the following carbocations is least stable?

(A) 

(B)

(C)

(D)

Compound having general formula is called

(A) diester

(B) acid anhydride

(C) hemiacetal

(D) acetal

Write the fomulae of the following compounds

Sodium hexanitrito- N - cobaltate (III)

Write molecularity of the following reaction:

2NO_(g)+O_2(g)→2NO_2(g)

Describe anomalous behaviour of fluorine with the other elements of group 17 wilh reference to :

(a) Hydrogen bonding

(b) Oxidation state

(c) Polyhalide ions

What are lanthanoids?

Which among the following pairs of elements is 'not' an example of chemical twins?

Give an example each of a molecular solid and an ionic solid.

For a reaction: 

Rate = k

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

(ii) Write the unit of k.

Write two differences between an ideal solution and a non-ideal solution.

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.