When an iron nail gets rusted, iron oxide is formed
Galvanised iron sheets have a coating of
Among the various allotropes of carbon,
The group of metals Fe, Co, Ni may best called as
Heavy water is
The chemical (ethyl mercaptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of
The element common to all acids is
Non stick cooking utensils are coated with
Monazite is an ore of
Carbon, diamond and graphite are together called
Potassium nitrate is used in
Permanent hardness of water may be removed by the addition of
Soda water contains
The most important ore of aluminium is
Most soluble in water is
Which of the following was to be discovered first in the chromospheres of the sun?
Which of the following is in liquid form at room temperature?
The only liquid elements at standard temperature and pressure are bromine (Br) and mercury (Hg). Although, elements caesium (Cs), rubidium (Rb), Francium (Fr) and Gallium (Ga) become liquid at or just above room temperature.
Sodium metal is kept under
Which of the following are the ingredients of gun metal?
Modern admiralty gunmetal is composed of 88 percent copper, 10 percent tin, and 2 percent zinc and is used for gears and bearings that are to be subjected to heavy loads and low speeds.
From which mineral is radium obtained?