Physical Chemistry MCQ with Answers

96) TiO₂ is a well known example of:

Answer is:

Tetragonal system

Explanation:

TiO₂ has a tetragonal system with 5 planes of symmetry and 5 axes of symmetry.

97) Which one is correct about ferrites?

Answer is:

All of the above

Explanation:

Ferrites are mixed oxides wherein the O₂⁻ ions are ccp with the larger divalent ions in one quarter of the octahedral holes and half of the smaller trivalent ions occupy both octahedral and tetrahedral holes.

98) Which of the following statements is true?

Answer is:

Ionic crystals have very low volatility

Explanation:

Ionic crystals have very high melting and boiling points and hence, low volatility.

99) Wax is an example of:

Answer is:

Molecular crystal

100) Graphite is a soft solid lubricant, extremely difficult to melt. The reason for this anomalous behaviour is that, graphite:

Answer is:

Has carbon atoms arranged in large plates of rings of strong bound carbon atoms with weak interplate bonds

Explanation:

Graphite has a 2D sheet like structure and each carbon atom is sp² hybridised.

96) TiO2 is a well known example of:

Tetragonal system

97) Which one is correct about ferrites?

All of the above

98) Which of the following statements is true?

Ionic crystals have very low volatility

99) Wax is an example of:

Molecular crystal

100) Graphite is a soft solid lubricant, extremely difficult to melt. The reason for this anomalous behaviour is that, graphite:

Has carbon atoms arranged in large plates of rings of strong bound carbon atoms with weak interplate bonds

96) TiO₂ is a well known example of: