MATTER AROUND US

Non-metals carbon, iodine, sulphur and phosphorus are
1. solids at room temperature
2. gases at room temperature
3. liquids at room temperature
4. None of these
Which of the following statements is false?
1. Metals are generally hard.
2. Non-metals are bad conductors of electricity.
3. Metals are lustrous. They have a shiny surface
4. Mercury is a non-metal.
The symbol of Gold is
1. Ag
2. Au
3. Go
4. None of these
The symbol of Antimony is
1. An
2. Sb
3. At
4. Am
The fundamental particle of an element is
1. Atom
2. Molecule
3. Ion
4. None of these
The full form of IUPAC is
1. International Union of Practcal and Applied Chemistry
2. International Union of Pure and Accurate Chemistry
3. Indian Union of Pure and Applied Chemistry
4. International Union of Pure and Applied Chemistry
Oxygen exists as a
1. Monoatomic molecule
2. Diatomic molecule
3. Triatomic molecule
4. Polyatomic molecule
The molecules of two different elements make up about 99% of the air.Select those two elements.
1. Oxygen
2. Argon
3. Nitrogen
4. Helium
How many elements are known till date?
1. 116
2. 118
3. 120
4. 108
Only Non-metal that conducts electricity is
1. Bromine
2. Iodine
3. Graphite
4. Copper