1. Which of the following is a liquid at room temperature?
A. Iron
B. Bromine
C. Iodine
D. Phosphorus
ANSWER:B.Bromine
SOLUTION : The only liquid elements at standard temperature and pressure are Bromine (Br) and Mercury (Hg).
2. The metal which is liquid at room temperature is ________.
A. Sodium
B. Bromine
C. Calcium
D. Mercury
ANSWER:D.Mercury
SOLUTION:Mercury is the only metal which is found in a liquid state at room temperature.
3. Which one of the following metals is the most ductile?
A. Aluminium
B. Copper
C. Silver
D. Gold
ANSWER :D.Gold
SOLUTION:Gold is the most ductile metal. A wire of about 2 km length can be drawn from one gram of gold.
4. Materials having qualities of both metals and non – metals are ______.
A. Alloys
B. Metalloids
C. Noble metals
D. None of these
ANSWER: B.Metalloids
SOLUTION:Elements showing properties of both metals and non-metals are known as metalloids.
5. Which metal reacts readily with cold water?
A. Gold
B. Silver
C. Sodium
D. Iron
ANSWER: C.Sodium
SOLUTION: Lithium , Sodium , Potassium , Rubidium , Caesium , and Francium , all react violently or even explosively with cold water to displace hydrogen.
6. The property of metals by which they can be beaten in to thin sheets is called __________.
A. Malleability
B. Ductility
C. Conduction
D. Expansion
ANSWER: A.Malleability
SOLUTION: Malleability is the property shown by metals by the virtue of which they can be beaten into thin sheets.
7. Which one of the following is metal ?
A. C
B. N
C. Na
D. O
ANSWER: C.Na
SOLUTION :
Carbon, nitrogen, and oxygen are non-metals, so A, B, and D are incorrect. Sodium is a soft, silvery-white, highly reactive alkali metal with an atomic number of 11. It belongs to group I of metallic elements and has the ability to lose electrons and form positive ions. Sodium is also a soft metal that can be easily cut with a knife.
8. Which one of the following is non metal ?
A. Zn
B. Al
C. Fe
D. N
ANSWER: D.N
SOLUTION:Nitrogen (N) is a non-metal. Non-metals are elements that exhibit some or none of the properties of metals, such as high density, melting point, boiling point, and good electrical and thermal conductivity.
9. All materials shown property of malleability expect ________.
A. Iron
B. Graphite
C. Aluminium
D. Silver
ANSWER: B.Graphite
SOLUTION:Graphite is not malleable because it is a non-metal.
10. The property of metal by which it can be drawn into wires is called ____________.
A. Conductivity
B. Malleablility
C. Ductility
D. Decorating
ANSWER: C.Ductility
SOLUTION:
The property of metal by which it can be drawn into wires is called ductility.