Physical Properties of Nonmetals

Q.

What is the definition of metals?

Q.

All metals reacts with acid. Why copper reacts with sulphuric acid but not hydrochloric acid?

Q. Is Silicon considered as an metal or non metal?

Q.

Name a non-metal which is a good conductor of electricity.

Q. Why do gold and silver do not react with hydrochloric acid?

Q.

Explain the chemical properties of metals.

Q.

Name the non-metal used to make purple coloured solution which is applied on cuts and wounds as an antiseptic.

Q. Which metal is used in thermometers?

1. Sodium
2. Mercury
3. Magnesium
4. Silver

Q. Non-metals are bad conductors of heat and electricity.

1. True
2. False

Q.

Cooking utensils are made of metals but their handles are made of wood or plastic. Why? [2 MARKS]

Q. bond is formed between the non metals.

1. Ionic
2. Covalent
3. Metallic

Q.

Which element is used as a filler gas in fluorescent and incandescent light bulbs?

1. Argon

2. Helium

3. Radon

4. Carbon

Q.

State one use of the following non-metals:

(a) Oxygen (b) Nitrogen (c) Sulphur (d) Chlorine (e) Iodine

Q.

Bromine is the only element which is liquid at room temperature.

1. True

2. False

Q. Question 4 (d)
Coal can be drawn into wires. (True/False)

Q.

Name two major Non-metals which are present in fertilizers and enhance the growth of plants.

Q.

Hydrogen gas is evolved when copper turnings are added to dilute sulphuric acid.

1. True

2. False

Q. Which of the following metals melt at room temperature?

1. Caesium
2. Bromine
3. Sodium
4. Gallium

Q.

Element A is soft, brittle and does not conduct electricity.Element B is hard, malleable and ductile, and also conducts electricity. Which of the two elements, A or B, is a non-metal ?

Q.

Is it true that metals are not monoatomic?

Q. Which of the following is the characteristic of non-metals?

1. They are ductile.
2. They are good conductors of heat.
3. They are insulators.
4. They are good conductors of electricity.

Q.

Mercury + sulphuric acid $\to$ No reaction. This is because

1. Mercury is above hydrogen in reactivity series.

2. Mercury is below hydrogen in reactivity series.

3. Mercury is a liquid.

4. Sulphuric acid is a weak acid.

Q.

A solution of metal in mercury is called ________

Q. Coal can be drawn into wires.

1. True

2. False

Q.

Non-metals are sonorous in nature.

1. True
2. False

Q.

what is ionic bond

Q. A purple coloured non-metal forms a brown solution in alchohol which is applied on wounds as an antiseptic. Name the non-metal.

Q.

Pick out the odd property of rhombic sulphur:

1) Rhombic sulphur exists as octahedral crystals.

2) The density of rhombic sulphur is 2.06 g/mL.

3) Rhombic sulphur is a yellow solid with a melting point of 385.8K and is soluble in carbon disulphide and insoluble in water.

Q.

47. The screwdriver used by an electrician has a plastic or wooden handle. Why?

Q.

Which of the following option shows the correct characteristics of metals?

1. No electrical conductivity

2. Low melting point

3. High thermal conductivity

4. Non-ductile