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Chemistry Test 22
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Chemistry Test 22
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  • Question 1/30
    1 / -0
    During rainy seasons why do doors made up of wood swell up?
  • Question 2/30
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    Petroleum is a Mixture of –
  • Question 3/30
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    Who discovered cement?
  • Question 4/30
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    Which chemical is used for preserving fruit juices?
  • Question 5/30
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    The amount of chlorine available in water after disinfection called as
  • Question 6/30
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    The temperature of oxy–acetylene flame is around–
  • Question 7/30
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    What is the number of unpaired electrons in carbon atom?
  • Question 8/30
    1 / -0
    Atoms having same no of neutron but different no of electrons or protons are called –
  • Question 9/30
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    By whom was the absolute value of charge on electron determined?
  • Question 10/30
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    Which chemical is used in foam fire extinguishers?
  • Question 11/30
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    The fundamental particles that composed on atom are–
  • Question 12/30
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    Process of Removal of calcium and Magnesium is known as –
  • Question 13/30
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    The branch of medicine involving synthetic chemical compounds is–
  • Question 14/30
    1 / -0
    In the treatment of skin disease the radio isotope used is–
  • Question 15/30
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    Hygroscopic objects are those which instantly absorb–
  • Question 16/30
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    Electrolysis of copper sulphate solution with copper electrodes gives–
  • Question 17/30
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    The ore only two metals that are Non–Silver in colour, they are–
  • Question 18/30
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    A mixture of camphor and benzoic acid can be easily separated by which method?
  • Question 19/30
    1 / -0
    The addition of Gypsum to Portland cement helps in–
  • Question 20/30
    1 / -0
    Main Constituent of air is–
  • Question 21/30
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    Which type of reaction produces the most harmful radiation?
  • Question 22/30
    1 / -0
    Where is Pakistan’s nuclear power plant located?
  • Question 23/30
    1 / -0
    In an atomic nucleus, by which force are neutrons and protons held together?
  • Question 24/30
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    What does Hydrogen fuel cell vehicles produce as “exhaust”?
  • Question 25/30
    1 / -0
    When a bond is formed between two atoms, the energy so system will be–
  • Question 26/30
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    The antiseptic compound present in Dettol is –
  • Question 27/30
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    By which Carbon and hydrogen are estimated in organic compounds?
  • Question 28/30
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    Which compound is commonly used as antifreeze in automobile radiators?
  • Question 29/30
    1 / -0
    Which acid is used in synthetic lemonade?
  • Question 30/30
    1 / -0
    The rusting of iron–
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