Iron exhibits + 2 and +3 oxidation states. Which of the following statements about iron is incorrect ?(1) Ferrous oxide is more basic in nature than the ferric oxide.(2) Ferrous compounds are relatively more ionic than the corresponding ferric compounds(3) Ferrous compounds are less volatile than the corresponding ferric compounds.(4) Ferrous compounds are more easily hydrolysed than the corresponding ferric compounds.

in a physics laboratory a block x is balanced by a block Y of mass 200 kg,each are suspended from a balance of equal lever arms .the scale pan on X is at a height.H1=2 cm ,where as scale pan on Y is at height 1 cm above the floor.the error in weighing is (in gram)

consider the figure of a single riveted lap joint as follows

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cyclic heat engine operates between. temperature of 30 C. What is the least rate of heat rejection per kW net output of an engine. source temperature of 800 C and sink

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