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  • Question

  • In the reaction, Ca + 2H2O = Ca(OH)2 + H2 ; what volume (c.c.) of hydrogen at STP would be liberated, when 8 gm of calcium reacts with excess water? (atomic weight of calcium = 40)


  • Options
  • A. 4480
  • B. 2240
  • C. 1120
  • D. 0.4

  • Correct Answer
  • 4480 

    • More questions

    • 1. Which of the following efficiencies can be greater than 100%?

    • Options
    • A. Overall plate efficiency.
    • B. Murphree plate efficiency.
    • C. Point efficiency.
    • D. None of these.
      • Discuss
    • 2. Which of the following nuclear reactors is the most efficient thermodynamically while operating between the same temperature and pressure limits of the reactor?

    • Options
    • A. Molten sodium cooled
    • B. CO2 gas cooled
    • C. Pressurised water
    • D. Boiling water
      • Discuss
    • 3. Which of the following undergoes fission reaction easily?

    • Options
    • A. U-235
    • B. U-238
    • C. Th-232
    • D. none of these
      • Discuss
    • 4. Which of the following is not used as a moderator in nuclear reactor?

    • Options
    • A. Molten sodium
    • B. Light water
    • C. Beryllium
    • D. Boron hydride
      • Discuss
    • 5. Which of the following nuclear materials is fissile?

    • Options
    • A. Uranium-238
    • B. Thorium-232
    • C. Plutonium-239
    • D. None of these
      • Discuss
    • 6. In the nuclear reaction, 93N239→ 94Pu239 +?; the missing particle is a/an

    • Options
    • A. electron
    • B. proton
    • C. neutron
    • D. position
      • Discuss
    • 7. Which of the following ores contains maximum percentage of uranium?

    • Options
    • A. Carnotite
    • B. Thorium.
    • C. Rescolite
    • D. Pitchblende
      • Discuss
    • 8. The atomic weight and atomic number of an element are A and Z respectively. What is the number of neutrons in the atom of that element?

    • Options
    • A. A+Z
    • B. A- Z
    • C. A
    • D. Z
      • Discuss
    • 9. Which of the following isotopes is not present in natural uranium?

    • Options
    • A. U-238
    • B. U-234
    • C. U-235
    • D. U-232
      • Discuss
    • 10. Which of the following is present in Bhabha Atomic Research Centre (BARC) complex, Trombay (Bombay)?

    • Options
    • A. Power reactor
    • B. Research reactor
    • C. Fast breeder reactor
    • D. Heavy water plant
      • Discuss

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