Question : Bronze is an alloy of Which of the following?

Option 1: Copper and zinc

Option 2: Tin and Zinc

Option 3: Copper and Tin

Option 4: Iron and Zinc

Question : Which scientist discovered the radioactive element radium?

Option 1: Marie Curie

Option 2: Isaac Newton

Option 3: Albert Einstein

Option 4: Benjamin Franklin

Question : Which of the following weeds has been found useful to check water pollution caused by industrial affluents?

Option 1: Parthenium

Option 2: Elephant grass

Option 3: Water hyacinth

Option 4: Both (1) and (2) above

Question : Which of the following cost is related to marginal cost ?

Option 1: Variable cost .

Option 2: Implicit cost 

Option 3: Prime cost .

Option 4: Fixed cost .

Question : Chemobyl disaster is the result of pollution by

Option 1: Oil spill

Option 2: Acid rain

Option 3: Carbon dioxide

Option 4: Radioactive waste