Chemistry
Complete the statements given below, by filling in the blank with the correct word/s:
The ability of a metal to produce a resonant sound …………… [ductility/sonority/malleability].
A metal which floats on water …………… [zinc/potassium/magnesium].
A non-metal that leaves a mark on paper …………… [phosphorous/graphite/sulphur].
A non-metal which allows an electric current to pass through it …………… [graphite/sulphur/iodine].
A non-metal added to swimming pools to kill germs …………… [nitrogen/chlorine/oxygen].
Metals & Non-Metals
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Answer
The ability of a metal to produce a resonant sound sonority.
A metal which floats on water potassium.
A non-metal that leaves a mark on paper graphite.
A non-metal which allows an electric current to pass through it graphite.
A non-metal added to swimming pools to kill germs chlorine.
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Related Questions
Give a reason why –
(a) rust turns moist red litmus blue
(b) a green deposit is seen on the surface of an article of copper
(c) iron objects rust easily but the iron pillar at Qutab Minar has not rusted over the years.
State a specific reason for using –
(a) steel in automobiles
(b) gold in jewellery
(c) copper in electrical cables
(d) zinc in galvanizing
(e) lead in bullets
(f) magnesium in fireworks.
Give reasons for the following:
Metals form cations while non-metals form anions.
Potassium reacts vigorously with cold water while copper does not react with water or steam.
Rusting reduces the structural strength of iron.
A suspension of rust is basic in nature.
Galvanized steel is not used for articles used for edible applications.
Name the following:
The most reactive halogen.
A metal used in packaging.
The chemical compound responsible for the green deposit on the surface of articles of copper.
A metal used in flexible pipes.
A halogen which is solid at room temperature.