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Exam Year: 2000

  • Soft drinks such as colas contain significant quantities of

    (a)

    caffeine

    (b)

    nicotine

    (c)

    tannin

    (d)

    renin

    Correct Answer:

  • Which one of the following materials is very hard and very ductile ?

    (a)

    Carborundum

    (b)

    Tungsten

    (c)

    Cast iron

    (d)

    Nichrome

    Correct Answer:

  • Most of the explosions in mines occur due to the mixing of

    (a)

    hydrogen with oxygen

    (b)

    oxygen with acetylene

    (c)

    methane with air

    (d)

    carbon dioxide with ethane

    Correct Answer:

  • The stones formed in human kidney consist mostly of

    (a)

    calcium oxalate

    (b)

    sodium acetate

    (c)

    magnesium sulphate

    (d)

    calcium

    Correct Answer:

  • Assertion (A) : Small glass beads fixed on traffic signals glow brightly when light falls upon them. Reason (R) : Light is totally reflected when the angle of incidence exceeds a certain critical value and light travelling in a denser medium is reflected from a rarer medium.

    (a)

    Both A and R are true, and R is the correct explanation of A

    (b)

    Both A and R are true, but R is not a correct explanation of A

    (c)

    A is true, but R is false

    (d)

    A is false, but R is true

    Correct Answer:

  • Assertion (A) : A man standing on a completely frictionless surface can propel himself by whistling. Reason (R) : If no external force acts on a system, its momentum cannot change.

    (a)

    Both A and R are true, and R is the correct explanation of A

    (b)

    Both A and R are true, but R is not a correct explanation of A

    (c)

    A is true, but R is false

    (d)

    A is false, but R is true

    Correct Answer:

  • Assertion (A) : In a motion picture, usually 24 frames are projected every second over the whole length of the film. Reason (R) : An image formed on the retina of eye persists for about 0.1 s after the removal of stimulus.

    (a)

    Both A and R are true, and R is the correct explanation of A

    (b)

    Both A and R are true, but R is not a correct explanation of A

    (c)

    A is true, but R is false

    (d)

    A is false, but R is true

    Correct Answer:

  • When a CD (Compact Disc used in audio and video systems) is seen in sunlight, rainbow like colours are seen. This can be explained on the basis of the phenomenon of

    (a)

    reflection and diffraction

    (b)

    reflection and transmission

    (c)

    diffraction and transmission

    (d)

    refraction, diffraction and transmission

    Correct Answer:

  • For reproducing sound, a CD (Compact Disc) audio player uses a

    (a)

    quartz crystal

    (b)

    titanium needle

    (c)

    laser beam

    (d)

    barium titanate ceramic

    Correct Answer:

  • The memory of a computer is commonly expressed in terms of Kilobytes or Megabytes. A byte is made up of

    (a)

    eight binary digits

    (b)

    eight decimal digits

    (c)

    two binary digits

    (d)

    two decimal digits

    Correct Answer:

    (a)