Which of the following metals forms an amalgam with other metals?
A). Tin
B). Mercury
C). Lead
D). Zinc
Which of the following is used in pencils?
A). Graphite
B). Silicon
C). Charcoal
D). Phosphorous
Among the various allotrope of carbon
A). Coke is the hardest, graphite is the softest
B). Diamond is the hardest, coke is the softest
C). Diamond is the hardest, graphite is the softest
D). Diamond is the hardest, lamp black is the softest
Galvanised iron sheets have a coating of
A). Lead
B). Chromium
C). Zinc
D). Tin
When an iron nail gets rusted, iron oxide is formed
A). Without any change in the weight of the nail
B). With decrease in the weight of the nail
C). With increase in the weight of the nail
D). Without any change in colour or weight of the nail