CTET Solved Paper - RTET Feburary 2011 Paper2

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141. If Eo be the peak e.m.f. of alternating current, then root mean square e.m.f. will be

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142. Detergent is a complex salt of

  • Option : A
  • Explanation : Detergent is made by using sodium salt.
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143. Device used to send text and pictures is

  • Option : C
  • Explanation : FAX is an electronic tele communication system that transmits scanned documents from one terminal device to other.
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144. Which of the following mixtures of gases are used for welding of metals?

  • Option : D
  • Explanation : Oxygen and acetylene is used for welding of metals.
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145. Symbol of Tungsten element is

  • Option : A
  • Explanation : Tungsten is also known as wolfram is chemical element with symbol W.
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