411. The gravitational pull at the lunar surface is _ of Earth?
A: 44200
B: 44199
C: 44201
D: 44202
412. The luster of a diamond is due to____?
A: Total internal reflection
B: Reflection
C: Refraction
D: None of these
413. Water is a universal solvent for what reactions?
A: Biochemical
B: Chemical
C: Physical
D: Nuclear
414. When a person enters a dark room from bright light, he is not able to see clearly for a little while because the?
A: Retina becomes insensitive momentarily
B: Eye is unable to adjust itself immediately
C: Iris is unable to dilate the pupil immediately
D: The distance between the lens and retina takes time to adjust
415. The reverberation of a Huge explosion can be heard as:
A: Cosmic rays
B: Gamma rays
C: Microwave radio signals
D: Infrared radiations
416. Omar Khayyam was a:
A: Poet
B: Mathematician
C: Astronomer
D: All of these
417. Who was the early dentist and also the inventor of many surgical instruments:
A: Avicenna
B: Al-Zahrawi
C: Ibn-ul-haithem
D: Al-Jahiz
418. Who was the first Muslim mathematician who used ” zero”:
A: Ibn-e-Baitar
B: Ibn-e-Rushd
C: Ibn-Al-Haitham
D: Al Khwarizmi
419. Why some nebulae shine?
A: Because they emit light
B: Due to the burning process
C: Because they contain bright stars
D: Because they reflect light
420. A shooting star is:
A: Sun
B: A comet
C: A meteor
D: An asteroid
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