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Kerala (English Medium) / Chemistry Questions

Total Questions 667
what is endothermic reaction?
Mass no is the no. of neutrons and no. of protons added. Then how come chlorine has a mass no. 35.5?
what is c02
What is partial pressure
WHAT IS AVOGADRO LAW
what is Avogadro's law
what is the simple calclim
what is the simple oxgen
what is the simple carbon
How can we seperate Acetone & water?
HOW CAN WE SEPARATE MISCIBLE AND IMMISCIBLE LIQUID?
WE CAN SEPARATE MIXTURES ACCORDING TO THE NATURE OF SUBSTANCES. IS THIS STATEMENT IS TRUE?WHY?
HOW CAN WE SEPARATE ALCOHOL AND WATER?
if the boiling point of oxygen is -183c,what is the physical state of oxygen at -99c?,what about at -200c?
how distillation is different from fractionating column?
1.SO3 molecule has zero dipole moment,why? 2.SF6is a known compound but Scl6 and OF6 do not exist,why? 3.H2S is a gas where H2o is a liquid,why? 4.SO2 is a gas but SeO2 is a solid,why? 5.Pcl5 can be an oxidizing agent,not a reducing agent,why? 6.oxygen is a gas but sulphur is a solid,why?
WHAT IS THE IMPORTANT FEATURE OF THOMSON'S PLUM PUDDING MODEL?
What is known as periodic table?
DOES THE SURFACE TENSION FORCE THE SURFACE TO SHRINK OR EXPAND?
WHY THE SURFACE TENSION IS TRYING TO REDUCE THE SURFACE AREA?