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1. A
   the holes through the fibre are extremely fine.
2. B
   light rays are absorbed at the entry end and relieved at the exit end of the fibre.
3. C
   scattering of light occurs inside the fibre.
4. D
   successive total internal reflections occur as a ray moves through the fibre.

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1. A
   Cathode ray particles are electrons.
2. B
   Cathode ray particles start from anode and move towards cathode.
3. C
   In the absence of electrical and magnetic fields, cathode rays travel in straight lines.
4. D
   Television picture tubes are cathode ray tubes.

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1. A
   non-metallic hydrides.
2. B
   hydrogen peroxide.
3. C
   non-stoichiometric hydrides.
4. D
   alkali metal hydrides.

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1. A
   Copper
2. B
   Helium
3. C
   Iodine
4. D
   Barium

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1. A
   Zn > Cu > Ag
2. B
   Ag > Cu > Zn
3. C
   Cu > Zn > Ag
4. D
   Cu > Ag > Zn

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1. A
   Carbon dioxide
2. B
   Nitrous oxide
3. C
   Methane
4. D
   Oxygen

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1. A
   controls blood glucose levels.
2. B
   controls ovulation.
3. C
   controls metabolic rate.
4. D
   maintains pregnancy.

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1. A
   Varicella zoster
2. B
   Trypanosoma gambiense
3. C
   Salmonella typhi
4. D
   Plasmodium falciparum

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1. A
   Viruses need living cells to reproduce.
2. B
   All viruses are parasites.
3. C
   Viruses can synthesize their food through photosynthesis.
4. D
   Viruses are similar to chemical substances outside the host.

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1. A
   Rickets
2. B
   Rabies
3. C
   Hepatitis
4. D
   Scurvy

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1. A
   higher speed.
2. B
   higher frequency.
3. C
   longer wavelength.
4. D
   both higher speed and frequency.

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1. A
   $980$ m.s$^{-1}$ and $980$ J
2. B
   $\sqrt{980}$ m.s$^{-1}$ and $\sqrt{980}$ J
3. C
   $980$ m.s$^{-1}$ and $\sqrt{980}$ J
4. D
   $\sqrt{980}$ m.s$^{-1}$ and $980$ J

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1. A
   318 K
2. B
   45 K
3. C
   62·8 K
4. D
   335·8 K

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1. A
   light only.
2. B
   light and long wavelength infrared.
3. C
   light and short wavelength infrared.
4. D
   both short and long wavelength infrared.

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1. A
   1, 2, 3 and 4
2. B
   1, 2 and 4 only
3. C
   2 and 3 only
4. D
   3 and 4 only

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1. A
   Iron
2. B
   Mica
3. C
   Copper
4. D
   Bauxite

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1. A
   Rice
2. B
   Bajra
3. C
   Barley
4. D
   Ragi

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1. A
   parallel pattern of drainage.
2. B
   radial pattern of drainage.
3. C
   barbed pattern of drainage.
4. D
   trellis pattern of drainage.

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1. A
   South Atlantic Drift
2. B
   Mozambique Current
3. C
   East Australian Current
4. D
   Caribbean Current

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1. A
   Rihand
2. B
   Ganga
3. C
   Mahanadi
4. D
   Baitarani

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1. A
   Nebular hypothesis
2. B
   Binary theory
3. C
   Big Bang theory
4. D
   Planetesimal hypothesis

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1. A
   Champaran
2. B
   Kheda
3. C
   Ahmedabad
4. D
   Bardoli

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1. A
   1 only
2. B
   2 only
3. C
   Both 1 and 2
4. D
   Neither 1 nor 2

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1. A
   1 only
2. B
   2 only
3. C
   Both 1 and 2
4. D
   Neither 1 nor 2

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1. A
   1 only
2. B
   2 only
3. C
   Both 1 and 2
4. D
   Neither 1 nor 2

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