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The practical problem in Hydrogen production is it:______________?
A. Weight B. Valency C. Size D. Chemical property Submitted by :- Saqib Ali
Why do we determined the boiling point of a liquid?
A. To check its Acidity and Basicity B. To Check temperature C. To check its Purity and nature D. None…
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…
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 _________?
A. Compound B. Element C. Electrolyte D. Mixture Submitted by :- Saqib Ali
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