When were blue jeans invented in _________?

A. 1900s
B. 1860s
C. 1870s
D. 1850s

What charge card, developed in 1950, was the first to be accepted nationally in the US?

A. Visa
B. Discover
C. Mastercharge
D. Diner’s club

“Father of Optics” is the title given to__________?

A. Ibn-al-haitham
B. Ibn-e-sina
C. Al-kandi
D. Al-biruni

Galileo was an Italian astronomer who _________?

A. Developed the telescope
B. Discovered four satellites of jupiter
C. Discovered that the movement of pendulum produces a regular time measurement
D. All of the above

Exposure to sunlight helps a person improve his health because ________?

A. Resistance power increases
B. The infrared light kills bacteria in the body
C. The ultraviolet rays convert skin oil into vitamin d
D. The pigment cells in the skin get stimulated and produce a healthy tan

Gravity setting chambers are used in industries to remove ________?

A. Nox
B. Sox
C. Co
D. Suspended particulate matter

Friction can be reduced by changing from _________?

A. Rolling to sliding
B. Sliding to rolling
C. Dynamic to static
D. Potential energy to kinetic energy

Frederick Sanger is a twice recipient of the Nobel Prize for ________?

A. Physics in 1956 and 1972
B. Chemistry in 1958 and 1980
C. Physics in 1903 and chemistry in 1911
D. Chemistry in 1954 and peace in 1962

Escape velocity of a rocket fired from the earth towards the moon is a velocity to get rid of the _______?

A. Centripetal force due to the earth’s rotation
B. Earth’s gravitational pull
C. Pressure of the atmosphere
D. Moon’s gravitational pull

For seeing objects at the surface of water from a submarine under water, the instrument used is ________?

A. Periscope
B. Telescope
C. Kaleidoscope
D. Spectroscope