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NEET Practice Questions (MCQs) with Answers & Solutions

Practice free NEET NEET multiple-choice questions online with instant answers and detailed explanations. No login required.

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The salt which is most unlikely to occur as mineral is

A. Bromide B. Sulphate C. Oxide D. Sulphides

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During concentration of ore by froth flotation, the ore particles float on surface because:

A. Ores are insoluble B. Sulphides ores are lighter C. The surface is not wetted by $H_2O $ D. Difference in densities

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An ore contains Pbs with impurity Zns. NaCN is added in the froth flotation process ZnS does not form the froth because

A. NaCN forms a complex of ZnS on surface of ZnS B. ZnS is not wetted by pine oil C. ZnS is wetted by $H_2O$ D. NaCN reacts with ZnS ionic compound

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The method used for concentration of magnetic ore is

A. Gravity separation B. Froth floatation C. Magnetic separation D. Leaching

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During froth flotation process the student observed that the froth was disappear after formation. The student added---- to the container to overcome the difficulty

A. Pine oil B. Cresol C. Benzene D. NaCN

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Silver ore is related with $NaCN_{(aq)} $ to

A. Reduce silver B. Extract pure silver C. Refine silver D. To remove the impurities

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The principle involved in leaching is

A. Difference in volatility B. Difference in density C. Difference in solubility D. Soluble complex formation

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Heating of ore in presence of $O_2$ below its melting point is known as

A. Roasting B. Calcinations C. Smelting D. 2 &3

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During electrolysis graphite is used as an electrode &not diamond because

A. Graphite is cheaper B. Graphite is soft C. Graphite posses free electron while diamond doesnâ€™t D. Graphite is non reactive

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Group 1 & 2 elements are extracted by

A. Thermite process B. Electrolytic method C. Bessomerisation D. Cupellation

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