Solved Chemistry MCQS
The osmotic pressure of solution increases if
Volume is increased
Number of solute molecules are increased
Solution constant is increased
Temperature is decreased
Sodium thisoulphate is used in photography because of its
Reducing behaviour
Oxidizing behaviour
Photochemical behavior
Complexing behaviour
Helium-oxygen mixture is used by deep sea divers in preference to nitrogen-oxygen mixture because
Under the sea nitrogen and oxygen react to give poisonous nitric oxide
Helium is much less soluble in blood than helium
Nitrogen is highly soluble in water.
Helium is much less soluble in blood than nitrogen
Which one of the following elements occurs free in nature?
Sb
P
N
As
When KClO3is heated, it decomposes into KCl and O2. If some MnO2 is added, the reaction goes much faster because
MnO2 provide heat by reacting
MnO2 decomposes to give O2
MnO2 acts as a catalyst.
Better contact is provided by MnO2
Which of the following is an example of body centred cube?
Copper
Magnesium
Sodium
Zinc
Phosphide ion has the electronic structure similar to that of
Fluoride ion
Nitride ion
Chloride ion
Sodium ion
For most of the chemical reactions the rate of reaction
Remains constant as the reaction proceeds
Increase as the reaction proceeds
Decrease as the reaction proceeds
May increase or decrease during the reaction
Wholer prepared urea from
NH4CNO
NH3
Ammonia
Uric acid
Vitamin A is present in
Green vegetables
Milk
All
Liver