1. Which metal is found in ‘plaster of paris’?

Answer: Calcium

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MCQ->The simplest method of welding two pieces of metal together is known as pressure welding.The ends of a metal are heated to a white heat-for iron,the welding temperature should be about 1300C-in a flame.At this temperature the metal becomes plastic.The ends are pressed or hammered together,and the joint is smoothed off.Care must be taken to ensure that surfaces are thoroughly clean first,for dirt will weaken the weld.Moreover,the heating of iron or steel to a high temperature cause oxidation,and a film of oxide is added to the heated surfaces.For this reason,flux is applied to the heated metal.At welding heat,flux melts and the oxide particles are dissolved in it together with any other impurities which may be present.The metal surfaces are pressed together,and the flux is squeezed out from the center of the weld.A number of different types of weld may be used,but for fairly thick bars of metals,a vee-shaped belt should be normally employed.It is rather stronger than ordinary butt weld. The simplest way of welding two pieces of metal together is...
MCQ->Which of the below statement/s is/are correct regarding Paris Agreement: 1. Indian Union Cabinet has approved the signing of the Paris Agreement. It was adopted at the Conference of Parties held in Paris in December 2015. 3. On Earth Day on 23 April 2016, the agreement opens for signature. Almost 120 countries will take part in the signing ceremony....
MCQ-> In the following questions, you have two brief passages with five questions following each passage. Read the passages carefully and choose the best answer to each question out of the four alternatives.The crowd surged forward through the narrow streets of Paris. There was a clatter of shutters being closed hastily by trembling hands-the citizens of Paris knew that once the fury of the people was excited there was no telling what they might do. They came to an old house which had a workshop on the ground floor. A head popped out of the door to see what it was all about “Get him! Get Thimonier! Smash his devilish machines!” yelled the crowd. They found the workshop without its owner. M. Thimonier had escaped by the back door. Now the fury of the demonstrators turned against the machines that were standing in the shop, ready to be delivered to buyers. They were systematically broken up and destroyed – dozens of them. Only when the last wheel and spindle had been trampled under foot did the infuriated crowd recover their senses.“That is the end of M’Sieur Thimonier and his sewing machines,” they said to one another and went home satisfied. Perhaps now they would find work, for they were all unemployed tailors and seamstresses who believed that their livelihood was threatened by that new invention.The people thought that
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