CTET Solved Paper - UPTET Feburary 2014 Paper2

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106. Rusting of iron is

  • Option : C
  • Explanation : The rusting of iron is an electrochemical process that begins with the transfer of electrons from iron to oxygen so, it is a redox reaction where iron is the reducing agent and the oxygen is oxidising agent.
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107. Petroleum is refined by

  • Option : B
  • Explanation : Petroleum is a mixture of hydrocarbon molecules. These hydrocarbon molecules have different boiling points. On this basis they are separated from petroleum for refining it. This process of refining of petroleum is called fractional distillation.
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108. Which one of the following is known as Bayer's Reagent?

  • Option : A
  • Explanation : Dilute alkaline solution of potassium permanganate is known as Baeyer's is used in organic chemistry as qualitative test for the presence of unsaturation.
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109. "Which two numbers when multiplied give the product 24?"
This question

  • Option : D
  • Explanation : Is an open-ended question as it has more than one answer.
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110. A class VII teacher wants to discuss the following problem in the class,
"A square is divided into four congruent rectangles. The perimeter of each rectangle is 40 units. What is the perimeter of given square?"
Key mathematical concepts required to solve this problem is

  • Option : B
  • Explanation : Meaning of the term square, rectangle congruent, perimeter etc.
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