PUC Science 2nd PUC Class 12 - Karnataka Board PUC Question Bank Solutions

What role does adsorption play in heterogeneous catalysis?

Give four examples of heterogeneous catalysis.

Out of C and CO, which is a better reducing agent at 673 K?

Giving examples, differentiate between ‘roasting’ and ‘calcination’.

Why copper matte is put in silica lined converter?

Out of C and CO, which is a better reducing agent for ZnO?

Which is the last element in the series of the actinoids? Write the electronic configuration of this element. Comment on the possible oxidation state of this element.

Compare the chemistry of the actinoids with that of lanthanoids with reference to electronic configuration

Compare the chemistry of the actinoids with that of lanthanoids with reference to oxidation states

Compare the chemistry of the actinoids with that of lanthanoids with reference to chemical reactivity.

List various types of isomerism possible for coordination compounds, giving an example of each.

Write the free radical mechanism for the polymerisation of ethene.

What is meant by the term ‘broad spectrum antibiotics’? Explain.

Name a substance which can be used as an antiseptic as well as disinfectant.

What are the main constituents of dettol?

What is tincture of iodine? What is its use?

What happens when D-glucose is treated with the following reagent?

HNO₃

Arrange the following:

In decreasing order of the pK_b values:

C₂H₅NH₂, C₆H₅NHCH₃, (C₂H₅)₂NH and C₆H₅NH₂

Arrange the following:

In increasing order of basic strength:

C₆H₅NH₂, C₆H₅N(CH₃)₂, (C₂H₅)₂NH and CH₃NH₂