Science (English Medium) Class 11 - CBSE Question Bank Solutions for Chemistry

What are the oxidation numbers of the underlined elements in the following and how do you rationalise your results?

KI₃

What are the oxidation numbers of the underlined elements in the following and how do you rationalise your results?

H₂S₄O₆

What is the oxidation numbers of the underlined elements in the following and how do you rationalise your results?

 Fe₃O₄

What are the oxidation numbers of the underlined elements in the following and how do you rationalise your results?

CH₃CH₂OH

What is the oxidation number of the underlined elements in the following and how do you rationalise your results?

CH₃COOH

Consider the elements: Cs, Ne, I and F

Identify the element that exhibits only negative oxidation state.

Consider the elements: Cs, Ne, I and F.

Identify the element that exhibits only postive oxidation state.

Consider the elements: Cs, Ne, I and F

Identify the element that exhibits both positive and negative oxidation states.

Consider the elements : Cs, Ne, I and F

Identify the element which exhibits neither the negative nor does the positive oxidation state.

An aqueous solution of borax is _______.

What do you mean by ozone hole?

Which of the following statements about the electron is incorrect?

Out of electron and proton which one will have, a higher velocity to produce matter waves of the same wavelength? Explain it.

Write Lewis structure of the following compounds and show formal charge on atom.

\[\ce{HNO3}\]

Write Lewis structure of the following compounds and show formal charge on atom.

\[\ce{NO2}\]

Write Lewis structure of the following compounds and show formal charge on atom.

\[\ce{H2SO4}\]

Represent diagrammatically the bond moments and the resultant dipole moment in \[\ce{CO2, NF3}\] and \[\ce{CHCl3}\].

The oxidation number of an element in a compound is evaluated on the basis of certain rules. Which of the following rules is not correct in this respect?

In which of the following compounds, an element exhibits two different oxidation states.