Which of the following is not correct?
- A$3 O_2 \underset{\text{silent electric discharge}}{\rightleftharpoons} 2 O_3; \Delta H = -284.5 \ kJ$
- BOzone undergoes addition reaction with unsaturated carbon compounds.
- CSodium thiosulphate reacts with $I_2$ to form sodium tetrathionate and sodium iodide.
- DOzone oxidises lead sulphide to lead sulphate.
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A small body is released from a height $H$ of an inclined plane. At the bottom of the plane is a loop of radius $R$ as shown in the figure below. Ignoring friction, the minimum $H$ required for the body to just complete the loop (that is, reach the point $O$ ) is
A small body is released from a height $H$ of an inclined plane. At the bottom of the plane is a loop of radius $R$ as shown in the figure below. Ignoring friction, the minimum $H$ required for the body to just complete the loop (that is, reach the point $O$ ) is
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