Q3. Rust on iron is basically…?
(a) An Oxide
(b) A Nitride
(c) A Chloride
(d) A Sulphide
Q4. Which of the following metals is often found in the pure state?
Q5. Metals that can be easily beaten into sheets are known as __________ metals.
Q6.Often to prevent corrosion, metals are galvanized by covering them with a layer of
Q7.Yeast is an important source of
(a) Vitamin B
(b) vitamin C
Q8. Which of the following does not belong to this group?
Q9.Which metal is extracted from Haematite?
Q10. Which of the following is a pure substance made up of two or more types of atoms or elements?
(a) A mixture
(b) An element
(c) A compound
(d) An atom
Q11.If a metal ore is titled “pyrites” then it most probably has
Q12. Which of the following is the smallest part of a compound, whose properties are the same as those of the compound?
Q13.Which metal is extracted from Bauxite?
Q14. A process of sudden cooling is known as
Q15. A process of very slow regulated cooling is known as