Class X

Alpha (α) particles are helium (He) nucleus with a charge of
  1. e
  2. 2e
  3. 3e
  4. 4e
When two light nuclei combine to form a heavier nucleus, the process is said to be
  1. Nuclear fission
  2. Nuclear power
  3. Nuclear fusion
  4. Nuclear transmutation
The temperature at the center of sun is
  1. 20 million kelvin
  2. 30 million kelvin
  3. 40 million kelvin
  4. 50 million kelvin
Beta particles are stream of high energy
  1. Protons
  2. Photons
  3. Electrons
  4. Positrons
A helium nucleus comprising of two protons and two neutrons with a charge of 2e is
  1. alpha particle
  2. beta particle
  3. gamma particle
  4. negative particle
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