Gangue.
Gangue.
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The earthly and undesired impurities of various susbstances like send `(SiO_(2))`, metal oxides, etc. present in the ore are called gangue or matrix.
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(1) Metals occur in the native form because of their (a) High electronegativity (b) Low reactivity ( c) Low density (d) High reactivity (2) Specific gravity of slag is (a) Higher than molten metal (b) Same as that of molten metal ( c) Less as that of molten metal (d) None of the above (3) Which process is used for the extraction of metals from their sulphide ores ? (a) Smelting Froth flotation ( c) Electrolysis (d) Metal displacement (4) Calamine is an ore of (a) Hg (b) Zn ( c) Ca (d) Cd (5) Non-fusible impurities of ores removed by adding Slag (b) Flux ( c) Gangue (d) None (6) Common method of extraction of metals from oxide ore involves. (a) Reduction with aluminium (b) Reduction with carbon Reduction with hydrogen (d) Electrolytic method (7) Smelting is the reduction of oxide to metal by (a) Carbon (b) Hydrogen ( c) Aluminimum (d) Electric current During froth flotation process, commonly used frother is. (a) CuSO_(4) (b) NaCN + alkali ( c) Pine oil (d) Potassium xanthate (9) Iron ores are dressed by (a) Froth flotation process (b) Hand picking ( c) Magnetic separation (d) All of the above (10) Silicon is the main constituent of (a) Alloys (b) Rocks ( c) Animals Plants.
After this incident I went to Nainital , and returned after nearly a month .I had 113.________ taken 114.__________ my clothes when I saw Gangu standing 115.__________ a new baby.He was 116.________ with joy ,Even Nanda 117.___________not have 118. _________such joy 119.__________ getting Krishna .His face had the same 120. _________ that 121._________ on the face of a 122._________ man after a full meal.
After this incident I went to Nainital , and returned after nearly a month .I had 113.________ taken 114.__________ my clothes when I saw Gangu standing 115.__________ a new baby.He was 116.________ with joy ,Even Nanda 117.___________not have 118. _________such joy 119.__________ getting Krishna .His face had the same 120. _________ that 121._________ on the face of a 122._________ man after a full meal.
After this incident I went to Nainital , and returned after nearly a month .I had 113.________ taken 114.__________ my clothes when I saw Gangu standing 115.__________ a new baby.He was 116.________ with joy ,Even Nanda 117.___________not have 118. _________such joy 119.__________ getting Krishna .His face had the same 120. _________ that 121._________ on the face of a 122._________ man after a full meal.