Top 1000+ Solved Chemistry MCQ Questions Answer
Q. The element which is used for vulcanizing rubber –
a. Sulphur
b. Bromine
c. Silicon
d. Phosphorus
Q. Which of the following is responsible for the extra strength of pyrex glass?
a. Potassium Carbonate
b. Lead Oxide
c. Borax
d. Ferric Oxide
Q. Raw materials used for the manufacture of glass are –
a. sand, soda, limestone
b. sand, charcoal, soda
c. limestone, charcoal, sulphur
d. sand, sulphur, soda
Q. Which of the following is used in welding broken pieces of iron rails and machine parts?
a. Aluminium sulphate
b. Solder
c. Aluminium powder
d. None of the above
Q. Stainless steel is usually made by alloying the steel with –
a. copper and nickel
b. copper and chromium
c. chromium and nickel
d. manganese and copper
Q. Which one of the following organic compound is used to remove stains of iron compounds?
a. Oxalic acid
b. Benzoic acid
c. Phthalic acid
d. Cinnamic acid
Q. Which one of the following pairs is NOT correctly matched?
a. Haematite : Copper
b. Bauxite : Aluminium
c. Monazite : Thorium
d. Pitchblende : Uranium
Q. Which of the following is used for refrigeration?
a. Sulphur dioxide
b. Chlorine
c. Freon
d. Phosphine
Q. Electrons in the highest energy level of an atom are called .
a. valence protons
b. orbital protons
c. valence electrons
d. orbital electrons
Q. Bromine is-
a. Colorless gas insoluble in water
b. A highly inflammable gas
c. A Black solid
d. A red liquid
Q. Which among the following is used in making liquors, medicines and as a fuel in aircrafts?
a. Propyl alcohol
b. Dimethyl alcohol
c. Ethyl alcohol
d. Methyl alcohol
Q. The nuclear particles which are assumed to hold the nucleons together are -
a. positrons
b. neutrons
c. electrons
d. mesons
Q. Milk of magnesia is a suspension of –
a. magnesium sulphate
b. magnesium carbonate
c. magnesium hydroxide
d. magnesium Chloride