Which of the following can be separated by ” Sublimation Method”?
A. Sand and Iron Filing
B. Sand and Naphthalene
C. Both A & B
D. None
Submitted by :- Jamil Ahmed
CHEMISTRY
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The Chemical Formula of Sand is___________?
A. Si2O3
B. SiO2
C. Al2O3
D. Sr2O
Submitted by :- Saqib Ali
Benzene gives mainly_________?
A. Addition reaction
B. Substitution reactions
C. Halogenation
D. All of these
Submitted by :- Mansoor Khan
The element used for the formation of alloys is__________?
A. Iron
B. Calcium
C. Mercury
D. Chromium
Submitted by :- Saqib Ali
Air is a/an _________?
Give Electronic configuration of Sodium:
A. 1s2,2s2,2p6
B. 1s2,2s2,2p6,3s2
C. 1s2,2s2,2p6,3s1
D. None of these
Submitted by :- Jamil Ahmed
For the generation of biogas, the materials commonly used are__________?
A. Animal wastes
B. Forest residues
C. Aquatic plants
D. None of these
Submitted by :- Jamil Ahmed
Which of the following is not the name of any scientist?
A. Pauli exclusion principle
B. Hund’s rule
C. Aufbau’s principle
D. Le-Chatelier’s principle
Submitted by :- Jamil Ahmed