☰ Everyday Science (General Science) - MCQs

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Q19.

Which one of the following is not a chemical change ?

  • A. Digestion of food
  • B. Freezing of water
  • C. Curding of milk
  • D. Ripening of fruits
    ✍ Discuss    
Q20.

Butter is a colloid formed when

  • A. water is dispersed in water
  • B. fat is dispersed in water.
  • C. fat globules are dispersed in water.
  • D. None of these
    ✍ Discuss    
Q21.

Radioactive substance used in dating geological object is

  • A. C-11
  • B. C-12
  • C. C-14
  • D. None of these
    ✍ Discuss    
Q22.

The gas used in a refrigerator is

  • A. Cooled down when expanded
  • B. Heated up on flowing
  • C. Cooled down when compressed
  • D. None of these
    ✍ Discuss    
Q23.

A radar beam consists of

  • A. microwaves
  • B. X-rays
  • C. ultraviolet rays
  • D. infrared rays
    ✍ Discuss    
Q24.

A fuse wire is made of an alloy of

  • A. tin and aluminium
  • B. tin and lead
  • C. tin and copper
  • D. None of these
    ✍ Discuss    
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