What happen in an oxidation reaction?
Protons are lost
Electrons are lost
Neutrons are lost
Electrons are gained
The soft silvery metallic element which ionizes easily when heated or exposed to light and is present in atomic clocks is
Calcium
Cesium
Cerium
Cerium
Which among the following is present inside the nucleus of an atom?
Protons and Neutrons
Electrons and Protons
Neutrons and Electrons
Neutrons, Protons, Electrons
The total energy of an electron inside an atom is
zero
more than zero
less than zero
less than zero
Which of the process is known as nitrification?
Reaction of nitrogen monoxide with oxygen to form nitric acid
Reaction of nitrogen dioxide with water to form nitric acid
Conversion of ammonia to nitrites
Conversion of ammonia to nitrites
Which among the following is an endothermic reaction?
Respiration
Combustion
Sweating
Burning of natural gas
Which among the following elements is a liquid at room temperature?
Phosphorus
Mercury
Sodium
Aluminium
Catalytic converters are generally made from
carbon
alkaline metals
transition metals
transition metals
