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Q. German silver, an alloy, does not contain the metal
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Q. Washing soda is the common name for
Q. Chemical composition of cement is
Q. The gas which emits from rice fields is
Q. Which of the following is an element?
Q. The temperature of high level(Sun) is measured by-
Q. If the kinetic energy of a body is increased by 9% then change in its momentum will be :
Q. The scientist Who among the following 1st sent electromagnetic waves to distant places is
Q. A plane glass slab is kept over coloured letters which appears least raised is
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