Statement -1 : Ores are generally converted into oxides , prior to reduction . Statement- 2 : Metal oxides can be easily reduced .

Statement -1 : Ores are generally converted into oxides , prior to reduction . Statement- 2 : Metal oxides can be easily reduced .
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Statement -1 : Ores are generally converted into oxides , prior to reduction . Statement- 2 : Metal oxides ... -1 : is false , statement-2 : is true
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Amongst the various ores of a metal (M) (sulphide, carbonates, oxides, hydrated or hydroxides) two ores [X] and [Y] show the following reactivity. (i)

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How many of the following are oxides ores (i) Carnalite (ii) Cuprite (iii) Cassiterite (iv) Chromite (v) Cinnabar (vi) Calamine (vii) Cerussite (Viii)

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DME and VOR are “frequency paired” because: a. The same receiver can be used for both aids b. The VOR transmitter is easily converted to the required DME frequency c. Cockpit workload is reduced d. Both ground transmitter aerials can be placed on the same site if required

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Which of the following metal oxides are reduced by ` Co `?

Description : Which of the following metal oxides are reduced by ` Co `?

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Which of the following oxides is reduced by water gas to obtain the metal during its extraction?

Description : Which of the following oxides is reduced by water gas to obtain the metal during its extraction?

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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

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Pick out the wrong statement: (A) Magnetic separation method can be employed to treat both dry & wet ores (B) Reduction ratio in crushing operation is defined as the ratio of minimum feed size to the maximum product size (C) Gyratory crusher is used for coarse crushing (D) Screens are of stationary, moving and vibratory types

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Members of which of the following classes of compounds generally produce acidic solutions when dissolved in water? w) metal oxides x) nonmetal oxides y) alcohols z) aldehydes

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Description : Minerals from which metals can be extracted economically and easily are called ores. The extraction of metals from theirs ores involves the following

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Minerals from which metals can be extracted economically and easily are called ores. The extraction of metals from theirs ores involves the following

Description : Minerals from which metals can be extracted economically and easily are called ores. The extraction of metals from theirs ores involves the following

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For the metallurgical process of which of the ores calcined ore can be reduced by carbon?

Description : For the metallurgical process of which of the ores calcined ore can be reduced by carbon?

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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

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Size reduction of the __________ can be suitably done by ball mills, crushing rolls and rod mills. (A) Metalliferous ores (B) Non-metallic ores (C) Basic slags (D) Asbestos & mica

Description : Size reduction of the __________ can be suitably done by ball mills, crushing rolls and rod mills. (A) Metalliferous ores (B) Non-metallic ores (C) Basic slags (D) Asbestos & mica

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Reverberatory furnace is used for (A) Roasting/reduction of ores (B) Annealing steel coil (C) Heating air (D) Steel melting

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Which of the following is the primary reason for adding calcium carbonate to the reduction process of iron oxide ores ? The calcium carbonate: w) acts as an oxidizing agent x) removes silicate waste products y) acts as a reducing agent z) removes sulfur waste products

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Last Answer : ANSWER: X -- REMOVES SILICATE WASTE PRODUCTS

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Near the top of the blast furnace, iron oxides are reduced to …… by carbon monoxide .

Description : Near the top of the blast furnace, iron oxides are reduced to …… by carbon monoxide .

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Generally sulphide ores are concentrated by following process

Description : Generally sulphide ores are concentrated by following process

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Involves compression in the transmitter after the input sample has been converted to a linear PCM code and then expansion in the receiver prior to PCM coding:

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In extraction of metal how many of the following ores calcination process is involved . (i) Dolomite (ii) Malachite (iii) Calcite (iv) Copper pyrities

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(A) All minerals are ores (R ) Ores are minerals from which metal can be extracted convenitly and economically

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What is metal ores?

Description : What is metal ores?

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Impurities in metal ores are called: w) flux x) gangue (pron: gang) y) slag z) sediments

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The assets that can be easily converted into cash within a short period, i.e., 1 year or less are known as A) Current assets B) Fixed assets C) Intangible assets D) Investments

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A sulphide ore is first converted into its oxide before reduction. This is done because :

Description : A sulphide ore is first converted into its oxide before reduction. This is done because :

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Cooking oil can be converted into vegetable ghee by the process of 1. hydrogenation 2. distillation 3. crystallisation 4. reduction The correct processes are: (a) 1 and 4 (b) 2 and 4 (c) 1 and 3 (d) 3 and 4

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Generally metallic oxides are basic and non-metallic are acidic in nature. Solution of which of the following oxides in water will change the colour of blue litmus to red? a)sulphur dioxide b)Magnesium oxide c)iron oxide d)copper oxide

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Last Answer : a)sulphur dioxide

Pick out the wrong statement. (A) Pulverised fuel can be completely burnt with less percentage of excess air compared to lump coal (B) Low grade coal can be used, but generally high volatile matter coals are more suitable for making pulverised fuel (C) Regulation of furnace temperature and atmosphere (oxidising or reducing) is easily possible with pulverised fuel firing (D) None of these

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An scan be easily converted to its decimal equivalent by multiplying each octal digit by positional weight: a. Binary number b. Octal number c. Hexadecimal number d. Decimal number

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You are provided with magnesium ribbon and sulpher powder. Explain with the help of an activity that metal oxides are basic and non-metal oxide are acidic in nature. -Chemistry

Description : You are provided with magnesium ribbon and sulpher powder. Explain with the help of an activity that metal oxides are basic and non-metal oxide are acidic in nature. -Chemistry

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Which processe is used to remove reducible oxides from the metal? -Do You Know?

Description : Which processe is used to remove reducible oxides from the metal? -Do You Know?

Last Answer : answer:

In Borax bead test, metal oxides react with `B_(2)O_(3)` and form a coloured bead. This bead contains

Description : In Borax bead test, metal oxides react with `B_(2)O_(3)` and form a coloured bead. This bead contains

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Which processe is used to remove reducible oxides from the metal?

Description : Which processe is used to remove reducible oxides from the metal?

Last Answer : Poling

Metal oxides are _______ in nature

Description : Metal oxides are _______ in nature

Last Answer : Basic

Pick out the wrong statement: (A) Change in barometric pressure does not affect the relative humidity (B) In case of a packed tower, the operating velocity is about half of the flooding velocity, generally (C) 'Elution' means the desorption of the adsorbed solute by a solvent (D) The equilibrium moisture content of the solid can be reduced by increasing the absolute humidity

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Last Answer : (D) The equilibrium moisture content of the solid can be reduced by increasing the absolute humidity

Which one of following statement about Overdenture is not correct: A. Greater occlusal loads can be applied by the patient B. Retention and stability are generally better than with conventional complete denture C. Alveolar bone resorption is reduced D. The retained roots are covered by the denture thus protecting them from caries and periodontal diseases

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Last Answer : D. The retained roots are covered by the denture thus protecting them from caries and periodontal diseases

When iron is rusted, it is (A) Converted to a fine powder (B) Reduced (C) Oxidised (D) None of these

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In which of the following pair(s) the minerals are converted in to metals by self-reduction process?

Description : In which of the following pair(s) the minerals are converted in to metals by self-reduction process?

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Main source of lead is galena `(PbS)`. It is converted to Pb by `:` Self`-` reduction process is `:`

Description : Main source of lead is galena `(PbS)`. It is converted to Pb by `:` Self`-` reduction process is `:`

Last Answer : Main source of lead is galena `(PbS)`. It is converted to Pb by `:` Self`-` reduction process is `:` A. A B. B C. both D. none

In mammals other than higher primates uric acid is converted by (A) Oxidation to allantoin (B) Reduction to ammonia (C) Hydrolysis to ammonia (D) Hydrolysis to allantoin

Description : In mammals other than higher primates uric acid is converted by (A) Oxidation to allantoin (B) Reduction to ammonia (C) Hydrolysis to ammonia (D) Hydrolysis to allantoin

Last Answer : Answer : A

UTP is converted to CTP by (A) Methylation (B) Isomerisation (C) Amination (D) Reduction

Description : UTP is converted to CTP by (A) Methylation (B) Isomerisation (C) Amination (D) Reduction

Last Answer : Answer : C

d-UMP is converted to TMP by (A) Methylation (B) Decarboxylation (C) Reduction (D) Deamination

Description : d-UMP is converted to TMP by (A) Methylation (B) Decarboxylation (C) Reduction (D) Deamination

Last Answer : Answer : A

HMG-CoA is converted to mevalonate by reduction catalysed by (A) HMG-CoA synthetase (B) HMG-CoA reductase (C) Mevalonate kinase (D) Thiolase

Description : HMG-CoA is converted to mevalonate by reduction catalysed by (A) HMG-CoA synthetase (B) HMG-CoA reductase (C) Mevalonate kinase (D) Thiolase

Last Answer : Answer : B