CHEMICALS, METALS, ACIDS AND GASES Objectives Mcqs

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•  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.
•  Sodium Benzoid is used for the preservation of grains.
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•  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.
•  Ore of Aluminum is Bauxite
•  Pyrolusite is an ore of manganese
•  Myrolusite is an ore of Manganese.
•  Ore of Gold is Native Gold
•  Argentite is an ore of silver
•  Magnetite and hematite are iron ores.
•  The important ore of Chromium is Chromite
•  Bauxite is an ore of aluminum. It contains mineral alumina, or aluminum oxide.
•  Diaspore, Felspar, Alurite, Zibcite, and Bauxite are the ores of Aluminum.
•  Malachite is an ore of Copper
•  Radium is extracted from an ore called Pitch Blonde
•  Which element is extracted from the ore Sphalerite-Zinc
•  Saccharine is obtained from coal tar
•  What is extracted from the ore cinnabar-Mercury
•  What is extracted from the ore caserite-Tin
•  Aqua Regia is the mixture of Nitric Acid and HCL in 1:3.

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