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A rectangular wire loop of sides 8 cm and 3 cm with a small cut, is moving out of a region of uniform magnetic field of magnitude 0.3 T directed normal to the plane of the loop. The emf developed across the cut, if the velocity o f the loop is 2 cm s^-1, in a direction normal to the shorter side of the loop, will be A) 1.8 X 10^-4 volt B) 1.0 X 10^-4 volt C) 4.8 X 10^-4 volt D) 1.3 X 10^-4 volt   Solution

When 1 dm³ of CO2 gas is passed over hot coke, the volume of gaseous mixture after complete reaction at STP becomes 1.4 dm³. The Composition of the gaseous mixture at STP is A) 0.6 dm³ of CO, 0.8 dm³ of CO2 B) 0.8 dm³ of CO, 0.8 dm³ of CO2 C) 0.8 dm³ of CO, 0.6 dm³ of CO2 D) 0.6 dm³ of CO, 0.4 dm³ of CO2 Solution