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PHYSICS MCQs

Total Questions : 3767 | Page 36 of 377 pages
Question 351. Burns caused by steam are much severe than those caused by boiling water because
  1.    Steam pierces through the pores of body quickly
  2.    Steam has latent heat
  3.    Steam is gas and engulfs the body quickly
  4.    Temperature of steam is higher
 Discuss Question
Answer: Option B. -> Steam has latent heat
Question 352. Heat stored in water vapour is
  1.    Specific heat
  2.    Latent heat
  3.    Absolute heat
  4.    Relative heat
 Discuss Question
Answer: Option B. -> Latent heat
Question 353. Which of the following produces more severe burns ?
  1.    Boiling water
  2.    Hot water
  3.    Steam
  4.    Melting iceberg
 Discuss Question
Answer: Option C. -> Steam
Question 354. Which of the following has got more heat capacity ?
  1.    Iron piece
  2.    Water
  3.    Gold piece
  4.    Benzene
 Discuss Question
Answer: Option B. -> Water
Question 355. Which one of the following has the highest value of specific heat?
  1.    Glass
  2.    Copper
  3.    Lead
  4.    Water
 Discuss Question
Answer: Option D. -> Water
Question 356. Water is used in car radiator because of its
  1.    Low density
  2.    Easy availability
  3.    High specific heat capacity
  4.    Low boiling point
 Discuss Question
Answer: Option C. -> High specific heat capacity
Question 357. Water is not suitable as a calorimetric substance because it :
  1.    Has high specific heat
  2.    Is a good conductor
  3.    Has high boiling point
  4.    Low latent heat of vapourization
 Discuss Question
Answer: Option A. -> Has high specific heat
Question 358. How much mechanical work must be done to completely melt 1 gram of ice at 0°C ?
  1.    4.2 J
  2.    80 J
  3.    336 J
  4.    2268 J
 Discuss Question
Answer: Option B. -> 80 J
Question 359. Water pipes in hilly areas often burst on a cold frosty night, because
  1.    The material of which pipes are made contracts due to cold and so breaks
  2.    Water in the pipes freezes and on freezing water expands, so pipes break
  3.    Frost makes the pipes rusty, so they break
  4.    None of these
 Discuss Question
Answer: Option B. -> Water in the pipes freezes and on freezing water expands, so pipes break
Question 360. Which of the following represents a relation for ''heat lost = heat gained'?
  1.    Principle of thermal equilibrium
  2.    Principle of colors
  3.    Principle of calorimetry
  4.    Principle of vaporization
 Discuss Question
Answer: Option C. -> Principle of calorimetry

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