The following 07 (Seven) items consist of two statements, statement I and statement II. You are to examine these two statements carefully and select the answers to these items using the code given below:
Statement I :I. Zinc is used for galvanization to protect iron from rusting.Statement II :II. Zinc is more reactive towards oxygen than iron.
Zinc reacts with oxygen to form zinc oxide, which further reacts with carbon dioxide to form zinc carbonate, a dull grey, fairly strong material that stops further corrosion.
Statement I :I. Very little hydrogen is produced when sulphuric acid is added to calcium.Statement II :II. The salt that is produced, calcium sulphate, is insoluble.
Statement I :I. Limestone decomposes when it is heated in air.Statement II :II. Increase in the content of CO2 in the atmosphere in recent years is mainly due to the using of limestone in the manufacture of cement.
Statement I :I. Glass is not considered as a true compound.Statement II :II. Glass does not have a definite melting point.
Statement I :I. In the 19th century, India was the largest British colony.Statement II :II. India became a big market for British manufactured goods and a field of investment for foreign capital in the 19th century.
Statement I :I. Doldrums is a calm belt between 5o N and 5o S of the equator.Statement II :II. The sun rays strike almost vertically over the equator throughout the year.
