Top 1000+ Solved Chemistry MCQ Questions Answer
Q. Which one of the following metals pollutes the air of a city having large number of automobiles?
a. Cadmium
b. Chromium
c. Lead
d. Copper
Q. `Milk of Magnesia' is a suspension of –
a. magnesium sulphate
b. magnesium carbonate
c. magnesium hydroxide
d. magnesium chloride
Q. The total energy of revolving electron in an atom –
a. cannot be negative
b. can have any value above zero
c. can never be positive
d. will always be positive
Q. The chief source for the production of nitrogeneous fertilizers is :
a. Ammonia
b. Nitric acid
c. Nitrogen
d. Nitrogen dioxide
Q. Zn + 2 HCl = H2 + ZnCl, is an example of which type of reaction?
a. Double displacement reaction
b. Combination reaction
c. Single displacement reaction
d. Decomposition reaction
Q. The first organic compound synthesized in the laboratory was -
a. Urea
b. Uric acid
c. Lactic acid
d. Glucose
Q. The green colour seen in firework displays is due to the chloride salt of–
a. Sodium
b. Strontium
c. Barium
d. Calcium
Q. The radiation that can penetrate deepest in our body –
a. UV-radiation
b. Alpha-particles
c. a-particles
d. Gamma-particles
Q. Which adioactive pollutant has recently drawn the attention of the public due to its occurrence in the building materials?
a. Radium
b. Radon
c. Thorium
d. Rlutonium
Q. Chemical properties of isotopes –
a. must be same
b. must be different
c. need not be same
d. need not be different
Q. Sour taste of lemon is due to the presence of which of the follow-ing?
a. Citric acid
b. Acetic acid
c. Oxalic acid
d. Formic acid