What is a mixture of Potassium Nitrate Powdered Charcoal and Sulphur called——?
A. Paint
B. Glass
C. Gun Powder
D. Cement
Covalent network crystals have———–?
A. Higher melting point then molecular crystals
B. lower melting point then molecular crystals
C. discrete molecules linked by Van der waals forces
D. Hydrogen bonding
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
Sodium carbonate is produced by ———–?
A. Haber process
B. Amonia solvay process
C. Decons process
D. lead chamber process
The study of organisms inhabiting the sea and ocean and the physical and chemical characteristics of their environment is:
A. Social Biology
B. Marine Biology
C. Environemntal Biology
D. Fresh Water Biology
Earthworm is included in——-?
A. Kingdom Plantae
B. Kingdom Protoctista
C. kingdom Monera
D. kingdom Animalia
Kingdom Fungi includes———?
A. A cellular, eukaryotic organizations
B. Non-chlorophylls, multicellular eukaryotic organisms
C. Non-chlorophylls, multicellular thallophytic organisms
D. Both B & C