metals, non metals, minerals, ores, properties, uses - Category wise Question and Answer Practice Test with Solutions

Question : 6

One of the constituents of amalgam is

a) iron

b) aluminium

c) copper

d) mercury

Question : 7 [CDS]

The form of carbon known as graphite

a) contains a higher percentage of carbon than diamond

b) is a better electrical conductor than diamond

c) is harder than diamond

d) has equal carbon-to-carbon distances in all directions

Question : 8

Which of the following statement is false?

a) Mercury is the only liquid metal.

b) Metals are good conductors of heat and electricity.

c) Gold, Silver and Zinc are most malleable metals.

d) Bromine is the only liquid non-metal.

Question : 9 [IAS (Pre) 2000]

Which one of the following materials is very hard and very ductile?

a) Tungsten

b) Cast iron

c) Carborundum

d) Nichrome

Question : 10 [NDA]

A glass of water does not turn into ice as it reaches 0 °C. It is because

a) a certain amount of heat must be supplied to the glass of water so as to solidify

b) a certain amount of heat must be taken out from the glass of water so as to solidify

c) water does not solidify at 0°C

d) water solidifies at 0 K only