CHEMICALS, METALS, ACIDS AND GASES

·   Substance which changes readily into vapor upon heating is called volatile

·   Selenium is a non metal

·   Most elastic among carbon, rubber, glass and paper is glass

·   Quartz is chemically silicon dioxide

·   Highest electrical conductivity is of Silver

·   Vinegar contains Acetic Acid.

·   Lightest element found in nature is hydrogen

·   Heaviest atom is uranium with atomic weight 92 amu

·   Molasses is a by-product of sugar industry.

·   Formic Acid is used in dying, tanning and electroplating.

·   Which gas discovered in 1898 has a name meaning new     Neon.

·   The metal known as quick silver: Mercury

·   Ethylene is a gas concerned with Ripening of fruits.

·   Opium is obtained from seed capsule of opium poppy.

·   Dry Ice is solid Carbon dioxide

·   The most common element in the universe is Nitrogen.

·   Geologists have classified nearly 3000 minerals.

·   Igneous rocks are solidified form of molten magma.

·   Sedimentary rocks are formed by the deposition of sediments in water.

·   Metamorphic rocks are the rocks transformed by the action of intense heat or great pressure or chemical activity.

·   Shale is a metamorphic rock.

·   Sedimentary rocks cover about 75% of world’s land area.

·   Moon rocks collected by astronauts are igneous in type.