Metals

Which of the following filler material can be used for brazing?

Food cans are coated with tin but not with zinc because _____.

Which of the following is a chemical change?

Which of the following is a physical change?
A. Hammering of a red-hot iron rod to make a flat sheet.
B. Formation of ice by cooling of water.
C. Rising up of water vapors from sea to make clouds.
D. Heating of charcoal in the air to high temperature till it begins to glow.

ABC is an isosceles triangle in which AB = AC. If D and E are the mid-points of AB and AC respectively. The point B, C, D, E are:

Out of the following _____ has the greatest elasticity.

Which one of the following is an alloy?

The instrument Taseometer is used to measure.

Highly reactive metal among the following:

The percentage of carbon in cost iron :

Which of the following is very reactive and kept in kerosene?

When an iron nail gets rusted, iron oxide is formed?

Brass is an alloy of _____.

Galvanised iron sheets have a coating of-

Which of the following metal remains in liquid form under normal condition?

Sodium metal is kept under _________.

Consider the following statements regarding graphite -
$1$. It is an allotrope of carbon.
$2$. It is a good conductor of heat and electricity.  
$3$. It can be artificially produced.
Of these statements, which statements are correct.

Which element is used to make the coils used in water heaters?

Bronze is an alloy of copper and _____.