Applications of Metals and Nonmetals

Q. Which metals given below can be used for making bronze?

1. Tin
2. Silver
3. Both (a) and (b)
4. Copper

Q. Identify the substance used as a moderator in nuclear reactors.

1. Diamond
2. Dolomite
3. Graphite
4. Cadmium

Q. Assertion [A]: Zinc is used in galvanisation of iron.
Reason [R]: Galvanisation increases the life of iron articles by protecting them from rusting.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R is not the correct explanation of A.
3. A is false but R is true.
4. A is true but R is false.

Q.

Which of the following element is alloyed with magnesium metal for various commercial purposes?

1. Iron

2. Nickel

3. Aluminium

4. Copper

Q. Food cans are coated with tin and not with zinc because:

1. Zinc is more reactive than tin.
2. Zinc has a higher melting point than tin.
3. Zinc is costlier than tin.
4. Zinc is less reactive than tin.

Q. Which one of the following is applied on wounds as an antiseptic?

1. Non-metals
2. Metalloids
3. Metal oxides
4. Metals

Q.

Identify the properties of the metals from the uses mentioned in the table given below.
$$\begin{array}{cc}\text{Uses}& \text{Property}\\ \text{Used to make foils to wrap food}& \text{X}\\ \text{Used to make electric wires}& \text{Y}\\ \text{Used to make ornaments}& \text{Z}\end{array}$$

1. X:- Malleability

   Y:- Metallic lustre

   Z:- Ductility
2. X:- Malleability

   Y:- Ductility

   Z:- Metallic lustre
3. X:- Metallic lustre

   Y:- Ductility

   Z:- Malleability
4. X:- Metallic lustre

   Y:- Malleability

   Z:- Ductility

Q. Statement I: Metals are good thermal conductors.
Statement II: The handles of cooking pans are not made up of metals.

1. Only statement I is correct.
2. Only statement II is correct.
3. Both the statement are correct.
4. Both the statement are incorrect.

Q. Which materials can be used to make the handle of a frying pan?

1. Copper
2. Wood
3. Iron
4. Plastic

Q. Which metal is used to manufacture cans, foils to wrap food, kitchen utensils etc?

1. Zinc
2. Copper
3. Aluminium
4. Potassium