The atmospheric air is held to the Earth by
gravity
winds
clouds
rotation of the Earth
A.
gravity
The Refrigerant 'FREON' is
Calcium Tetra Fluoride
Difluoro Dichloro Methane
Fluorspar and Felspar
Hydrofluosilicic Acid
The time period of a pendulum when taken to the Moon would
remain the same
decrease
become zero
increase
White lung disease is prevalent among the workers of
Paper Industry
Cement Industry
Cotton Industry
Pesticide Industry
The constituents of automobile exhaust that can cause cancer is/are
Oxides of nitrogen
Carbon monoxide
Polycyclic hydrocarbons
Lead
'Shock-absorbers' are usually made of steel as it
is not brittle
has lower elasticity
has higher elasticity
has no ductile property
The addition of gypsum to portland cement helps in
increasing the strength of cement
rapid setting of cement
preventing rapid setting of cement
reduction in the cost of cement
Which of the following could be used as fuel in propellant or rockets?
Liquid Hydrogen + Liquid Nitrogen
Liquid Oxygen + Liquid Argon
Liquid Nitrogen + Liquid Oxygen
Liquid Hydrogen + Liquid Oxygen