Who invented the contact lens?

• Enrico Fermi
• Adolf Gaston Eugen Fick
• Sandford Fleming
• Benoit Fourneyron

Metrology is a science of:

• Wheather
• Measurement
• Distance
• none of these

Purity of milk is tested by:

• Electrometer
• Lactometer
• Radiometer
• Refractometer

The largest artery in human body is:

• Aorta
• Capillary
• Vena cava
• Pulmonary vein

Who discovered Electron?

• Enrico Fermi
• Robert Noyce
• J.J.Thomson
• James Dyson

Who invented Dynamite?

• J B Dunlop
• Alfred Nobel
• James Simons
• Peter Hargreaves

Which of the following trees shed their leaves once in a year?

• Deciduous trees
• Coniferous trees
• Evergreen trees
• Both deciduous and coniferous trees

Gravitational force is maximum at which of the following place?

• At equator
• At tropic of cancer
• At tropic of Capricorn
• At poles

Red data book contains data of which of the following?

• All plant species
• All animal species
• All endangered species
• All extinct species

Which of the following is an Inert Gas?

• Hydrogen
• Nitrogen
• Oxygen
• Argon