The common elements present in the anode mud in electrolytic refining of copper are -
1. Nitrogen, magnesium, sodium
2. Silver, gold, platinum, and antimony
3. Oxygen, sulphur, lithium
4. Nitrogen, magnesium, oxygen
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe role of silica in the metallurgy of copper is :
1. | To remove the iron oxide obtained during the process of roasting as ‘slag’. |
2. | To remove the sulphur oxide obtained during the process of roasting as ‘slag’. |
3. | To remove the nitrogen oxide obtained during the process of roasting as ‘slag’. |
4. | To remove the aluminium oxide obtained during the process of roasting as ‘slag’. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe term “Chromatography” means -
1. Technique for the preparation of mixtures.
2. Technique for the separation of mixtures.
3. Technique for the separation of ore.
4. Technique for the preparation of aluminium.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich of the following statements is true about the refining of nickel?
1. | Nickel is heated in the presence of NO2 to form nickel tetracarbonyl. |
2. | Nickel is heated in the presence of CO to form nickel tetracarbonyl. |
3. | Nickel is heated in the presence of CO2 to form nickel tetracarbonyl. |
4. | Nickel is heated in the presence of SO2 to form nickel tetracarbonyl. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology‘Cast iron’ is different from ‘Pig iron' because :
1. | Cast iron is obtained by melting pig iron and coke using a hot air blast. |
2. | Cast iron contains lower amount of carbon (3%) than pig iron. |
3. | Unlike pig iron, cast iron is extremely hard and brittle. |
4. | All of the above |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyCopper matte is put in silica lined converter to :
1. | Remove the remaining H2SO4 and H2S present in the matte as slag. |
2. | Remove the remaining MnO and FeS present in the matte as slag. |
3. | Remove the remaining Fe2O3 and Fe2S present in the matte as slag. |
4. | Remove the remaining FeO and FeS present in the matte as slag. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyConsider the following statements:
a. | Zone refining method is useful for producing semiconductors and other metals of very high purity. |
b. | Zone refining method is based on the principle that "the impurities are less soluble in the melt than in the solid-state of the metal". |
c. |
In column chromatography, the most readily adsorbed substances are retained near the top. |
d. | In column chromatography, the stationary phase is packed in a glass tube. |
Select the correct statements.
1. a, c, d
2. a, b
3. b, c
4. a, b, c, d
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyVapour phase refining process is used for refining :
1. Ni
2. Ti
3. Zr
4. All of the above
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe incorrect statement(s)among the following is/are:
1. | Zone refining is based on the principle that impurities are more soluble in the molten state of metal (the melt) than in the solid-state. |
2. | Electrolytic refining is the process of refining impure metals by using electricity. |
3. | The impurities present in the impure metal gets collected below the anode in the electrolytic refining process. |
4. | None of the above |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology