Chemistry : Part I for Class XII
The Solid State - 02

Instructions 

1. All questions are compulsory.
2. Please give the explanation for the answer where applicable.
3. To view the answer, click on the Answer link alongside the Question.
You can view the answer when the link becomesGreen Red. on completion of allocated time.

Q.1) A mineral contains Ca, O and Ti. Oxygen atoms are present at face centres, calcium atoms are present at corners and titanium atoms at centre of cube. Find the oxidation number of titanium in the mineral. (3 Marks) 

Q.2) Find the type of lattice for cube having edge length of 400 pm, atomic wt. = 60 and density = 6.25 g/cc.  (3 Marks) 

Q.3) The density of an atom is 7.2g cm–3. It has bcc structure. The edge length is 288pm. How many atoms of element does 208g of element has? (3 Marks) 

Q.4) Write two differences between isotropy and anisotropy. (2 Marks) 

Q.5) Explain
(i) Ferrimagnetism 
(ii) Semiconductors (2 Marks) 

Q.6) What is doping? How does n type and p type semiconductors differ from each other? (2 Marks) 

Q.7) What is rank? Find rank of face centered cubic unit cell. (2 Marks) 

Q.8) What type of solids are malleable, ductile and electrical conductors? (1 Marks) 

Q.9) How many atoms are present ion the unit cell of BCC and FCC? (1 Marks) 

Q.10) Sometimes , common salt is yellow instead of being pure white why? (1 Marks)