Description : A sulphide ore is first converted into its oxide before reduction. This is done because :
Last Answer : A sulphide ore is first converted into its oxide before reduction. This is done because : A ... oxide is generally less stable than the metal sulphide
Description : Assertion : Froth flatation process is used to concentrate sulphide ores. Reason : There is a difference in the nature of wettibility of different ore
Last Answer : Assertion : Froth flatation process is used to concentrate sulphide ores. Reason : There is a difference ... -1 is false but Statement -2 is true
Description : Froth floatation process for the concentration of sulphide ore is an illustration of the practical application of
Last Answer : Froth floatation process for the concentration of sulphide ore is an illustration of the practical ... B. absorption C. sedimentation D. cogulation
Description : Extraction of `Ag` from sulphide ore and removal of unreacted silver bromide from phorographic plate involve complexes:
Last Answer : Extraction of `Ag` from sulphide ore and removal of unreacted silver bromide from phorographic plate involve ... (3))_(2)]^(3-)` respectively
Description : In the extraction of Cu from its sulphide ore, the metal is formed by reduction of `Cu_(2)O` with
Last Answer : In the extraction of Cu from its sulphide ore, the metal is formed by reduction of `Cu_(2)O` with A. FeS B. CO C. `Cu_(2)S` D. `SO_(2)`
Description : The most suitable method for extraction of copper from low grade sulphide ore is
Last Answer : The most suitable method for extraction of copper from low grade sulphide ore is A. Smelting ... process C. Leaching process D. Electrolytic process
Description : (A) Auto reduction of ore is used for the extraction of copper (R ) The sulphide ore of copper reacts with its oxide to the give the metal
Last Answer : (A) Auto reduction of ore is used for the extraction of copper (R ) The sulphide ore of copper reacts ... . If (A) is incorrect but (R ) is correct
Description : (A) Roasting is a process in which the ore is heate in presence of air (R ) Concentration of sulphide ore is done by calcinaiton
Last Answer : (A) Roasting is a process in which the ore is heate in presence of air (R ) Concentration of sulphide ... . If (A) is incorrect but (R ) is correct
Description : Froth floatation process used for the concentration of sulphide ore. Which of the following statements are correct (a) It is based on the difference i
Last Answer : Froth floatation process used for the concentration of sulphide ore. Which of the following statements are correct (a) ... . (a), (b) ( c) are correct
Last Answer : Froth floatation process for the concentration of sulphide ore is an illustration of the practical ... B. absorption C. sedimentation D. coagulateion
Description : Which of the following metals can be oriented directly during the roasting of its sulphide ore
Last Answer : Which of the following metals can be oriented directly during the roasting of its sulphide ore A. Hg B. Zn C. Fe D. Ca
Description : Which one of the following does not occurs as sulphide ore
Last Answer : Which one of the following does not occurs as sulphide ore A. Zn B. Cr C. Ag D. Fe
Description : The product (s) of roasting of a sulphide ore is (are) (A) Oxide only (B) Sulphate only (C) Oxide and sulphate (D) Dependent on temperature and partial pressure of oxygen & sulphur dioxide
Last Answer : (A) Oxide only
Description : Describe the method used for concentration of sulphide ore.
Last Answer : Process : In this process, the powdered sulphide ore is mixed with water & pine oil. The whole mixture is then stirred vigorously by passing compressed air. The oil forms a froth with air ... ; sink to the bottom of the tank. The floating froth is then skimmed off into settling basins.
Description : In which of the folowing molecules, vacant orbitals do not participate in bonding :-
Last Answer : In which of the folowing molecules, vacant orbitals do not participate in bonding :- A. `B_(2)H_(6)` B. `Al_(2) ... H_(3)N.BF_(3)]` D. `Si_(2)H_(6)`
Description : During development which of the folowing organs is formed first
Last Answer : During development which of the folowing organs is formed first A. Heart B. Brain C. Neural tube D. Skin.
Description : Which of folowing tegmate of cockroach fused in adult atage ?
Last Answer : Which of folowing tegmate of cockroach fused in adult atage ? A. Head B. Abdomen C. Thorax D. (1) or (2)
Description : Which of the folowing are bipolymers?
Last Answer : Which of the folowing are bipolymers? A. Nylon B. Leather C. Bakelite D. Orlon
Description : Which of the folowing motion is related with the Union Budget? (1) Adjournment (2) Censure (3) Cut (4) None of the above
Last Answer : (3) Cut Explanation: Cut motion is a veto power given to the members of the Lok Sabha to oppose a demand in the financial bill discussed by the government. This can turn into an effective tool to ... is adopted by the House and the government does not have the numbers, it is obliged to resign.
Description : Which one of the folowing is a complication of streptococcal pharyngitis? a. Rheumatic Fever b. Pseudomembrane Blockage c. Strawberry Tongue d. Chest, Back, And Leg Pain
Last Answer : a. Rheumatic Fever
Description : which of the folowing is the most radiosenstive testicular tumor a- semenoma b- yolc sac tumor c- germ cell tuor d- choriocarcinoma e- immature teratoma
Last Answer : a- semenoma
Description : The coagulating power of electrolytes having ions `Na^(+),Al^(3+)` and `Ba^(2+)` for aresenic sulphide sol increases in the order :-
Last Answer : The coagulating power of electrolytes having ions `Na^(+),Al^(3+)` and `Ba^(2+)` for aresenic sulphide sol increases ... `Al^(3+)lt Na^(+)lt Ba^(2+)`
Description : Effective electrolyte to cause the flocculation of a negatively charged arsenium sulphide colloid is :
Last Answer : Effective electrolyte to cause the flocculation of a negatively charged arsenium sulphide colloid is : A. `NaCl` B. ` ... 3)Fe(CN)_(6)` D. `AlCl_(3)`
Description : For coagulation of arsenious sulphide sol, which one of the following salt solution will be most effective ?
Last Answer : For coagulation of arsenious sulphide sol, which one of the following salt solution will be most effective ? A. `Na_( ... (3)` C. `BaCl_(2)` D. `NaCl`
Description : The coagulating power of electrolytes having inos `Na^(o+),Al^(3+)` and `Ba^(2+)` for arsenic sulphide sol increases in the order
Last Answer : The coagulating power of electrolytes having inos `Na^(o+),Al^(3+)` and `Ba^(2+)` for arsenic sulphide sol ... `Al^(3+) lt Na^(+) lt Ba^(2+)`
Description : Arsenic sulphide forms a sol with a negative charge. Which of the following ionic substances should be most effective in coagulating the sol?
Last Answer : Arsenic sulphide forms a sol with a negative charge. Which of the following ionic substances should be most effective in ... )_(3)` D. `Na_(3)PO_(4)`
Description : Sulphide ion reacts with `[Fe(CN)_(5)NO]` to form a purple coloured compound (X). In this reaction oxidation state of iron .
Last Answer : Sulphide ion reacts with `[Fe(CN)_(5)NO]` to form a purple coloured compound (X). In this reaction ... . changes from +2 to +4 D. does not change.
Description : which of the following radiations have least effect on both the photographic plate and zinc sulphide screen?
Last Answer : which of the following radiations have least effect on both the photographic plate and zinc sulphide ... `gamma-decays D. All have equal effect
Description : Among the sulphide oers of Ag,Hg,Pb,Fe Cu anZn how many of them can be extracted by self reduction process.
Last Answer : Among the sulphide oers of Ag,Hg,Pb,Fe Cu anZn how many of them can be extracted by self reduction process.
Description : Amongst the various ores of a metal (M) (sulphide, carbonates, oxides, hydrated or hydroxides) two ores [X] and [Y] show the following reactivity. (i)
Last Answer : Amongst the various ores of a metal (M) (sulphide, carbonates, oxides, hydrated or hydroxides) ... and hydroxide ores D. Carbonate and oxide ores
Description : Statement-1: Auto reduction of ores is used for cinnabar, copper glance and Galena ores Statement-2:The sulphide ores of these metals react with their
Last Answer : Statement-1: Auto reduction of ores is used for cinnabar, copper glance and Galena ores Statement-2: ... Statement-1 is false but Statement -2 is true
Description : Which of the following faction is of no significance for roasting sulphide ores to the oxide and not subjecting the sulphide ores in carbon reduction
Last Answer : Which of the following faction is of no significance for roasting sulphide ores to the oxide and ... are thermodynamically more stable than `CS_(2)`
Description : Assertion : Sulphide ores are concentrated by Froth Floatation method. Reason : Cresols stabilise the froth in Froth Floatation method
Last Answer : Assertion : Sulphide ores are concentrated by Froth Floatation method. Reason : Cresols stabilise the froth in Froth Floatation method
Description : In the Froth Floatation process, zinc sulphide and lead sulphide can be separated by__________
Last Answer : In the Froth Floatation process, zinc sulphide and lead sulphide can be separated by__________ A. ... C. using depressent D. using froth stablisers
Description : The method used for the enrichment of sulphide ores of copper is
Last Answer : The method used for the enrichment of sulphide ores of copper is A. Mangetic Separation B. Froth floatation process C. Electro refining D. Smelting
Description : Which of the following set of elements mostly occur as sulphide ores.
Last Answer : Which of the following set of elements mostly occur as sulphide ores. A. Zn, Cu,Na B. Zn, Cu, Pb C. Fe, Al, Ti D. Cu, Ag, Au
Description : Generally sulphide ores are concentrated by following process
Last Answer : Generally sulphide ores are concentrated by following process A. Hand picking B. Washing with water C. Leaching D. Froth floatation
Description : Iron sulphide is heated in air to form A, an oxide of sulphur. A is dissolved in water to give an acid. The basicity of this acid is..
Last Answer : Iron sulphide is heated in air to form A, an oxide of sulphur. A is dissolved in water to give an acid. The ... acid is.. A. 2 B. 3 C. 1 D. Zero
Description : Hydrogen sulphide cannot be dried by passing through conc. `H_(2)SO_(4)` . Why ?
Last Answer : Hydrogen sulphide cannot be dried by passing through conc. `H_(2)SO_(4)` . Why ? A. The acid ... C. Both form complex D. It dissovles in the acid
Description : How many number of valence electrons are there in a sulphide ion?
Last Answer : The sulfide ion is S^2-, so it has 2 additional valenceelectrons compared to neutral sulfur. Neutral sulfur has 6 valenceelectrons, so sulfide ion would have 8 valence electrons.
Description : What are the elements that make up copper sulphide?
Last Answer : Copper sulfide contain copper and sulfur.
Description : The central heavy metal cobalt of vitamin B12 is coordinately bound to (A) Cyanide group (B) Amino group (C) Carboxyl group (D) Sulphide group
Last Answer : Answer : A
Description : Which gas is commonly used in balloons and airships? A. Hydrogen B. Helium C. Carbon D. Hydrogen Sulphide
Last Answer : ANSWER: B
Description : 25 Which gas is commonly used in balloons and airships? A. Hydrogen B. Helium C. Carbon D. Hydrogen Sulphide
Description : The compounds responsible for causing “socks” to stink are 1. Butyric acid 2. Dimethyl sulphide 3. 2-Heptanone 4. 2-Nonanone 5. 2-Octanone Which compound(s) is/are present in the “socks stink”? (a) 1, 2, 3, 4 and 5 (b) 1, 3, 4 and 5 (c) 1, 2, 3 and 5 (d) 1, 4 and 5
Last Answer : Ans:(a)
Description : Philosopher’s wool contains zinc as its (a) oxide (b) bromide (c) nitrate (d) sulphide
Description : The term ‘Cynogenesis’ describes the release of (a) hydrogen cyanide (HCN) (b) hydrochloric acid (HCl) (c) hydrogen peroxide (H202) (d) hydrogen sulphide (H2S)
Description : Kelp is - (1) Sulphide mineral of iron (2) Partially decomposed vegetalion (3) Sea weed rich in iodine content (4) An aluminium silicate mineral
Last Answer : (3) Sea weed rich in iodine content Explanation: Kelps are large seaweeds (algae) belonging to the brown algae in the order Laminariales. Because of its high concentration of iodine, kelp has been used to treat goiter, an enlargement of the thyroid gland caused by a lack of iodine.
Description : The gas involved in Bhopal incident was - (1) Hydrogen sulphide (2) Nitrogen dioxide (3) Methyl chloride (4) Methyl isocyanide
Last Answer : (4) Methyl isocyanide