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What is a mixture of Potassium Nitrate Powdered Charcoal and Sulphur called?
A. Paint B. Glass C. Gun Powder D. Cement Submitted by :- Jamil Ahmed
Covalent network crystals have_____________?
A. higher melting point then molecular crystals B. lower melting point then molecular crystals C. discrete molecules linked by Van…
All of the following substances are crystalline except_____________?
A. Ice B. Diamond C. Sucrose D. Plastic Submitted by :- Jamil Ahmed
Some substances are good conductor of electricity in both the solid and liquid states. These substances are generally______________?
A. ionic substances B. metallic substances C. molecular solids D. covalent network solids Submitted by :- Jamil Ahmed
Which of the following is a substance?
A. Sea water B. Brass C. Tape water D. Graphite E. Sand Submitted by :- Jamil Ahmed
Sodium carbonate is produced by____________?
A. Haber process B. Ammonia Solvay process C. Decons process D. Lead chamber process Submitted by :- Jamil Ahmed
Electron was discovered by?
A. Michael Faraday B. James Maxwell C. Yuri Gagarin D. J.J Thomson Submitted by :- Jamil Ahmed
The radioactive isotope of hydrogen is called___________?
A. tritium B. deuterium C. protium D. ortho-hydrogen Submitted by :- Jamil Ahmed
The soul of chemistry is dealing with___________?
A. Internal structural changes in matter B. Composition of matter C. Properties of matter D. Composition and properties of matter…
Which one of the following has the maximum number of isotopes ?
A. oxygen B. carbon C. tin D. chlorine Submitted by :- Jamil Ahmed