Chemistry
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.
Metals & Non-Metals
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Answer
Fluorine.
Aluminium.
Copper carbonate
Lead
Iodine
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Related Questions
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].
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.
Match the correct answer from A, B, C, D and E – for each statement given below:
A : Boron, B : Chlorine, C : Potassium, D : Platinum, E : Radon
The element placed in the extreme left of the Modern Periodic Table.
The element which shows properties of both metals and non-metals.
The element from the halogen family which is most abundant.
The element which is noble gas and radioactive in nature.
The element which is a noble metal.
State whether the statements given below are true or false. If false write the correct statement.
Lead pencils contain lead.
The chemical name of rust is iron [III] oxide.
Silicon is an example of a metalloid.
Either oxygen or moisture is essential for rusting.
Graphite is a lustrous non-metal which conducts electricity.