Native silver metel froms a water solube, complesx with a dilute aqueous wsolution of `NaCN` in the presence of

Native silver metel froms a water solube, complesx with a dilute aqueous wsolution of `NaCN` in the presence of
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Native silver metel froms a water solube, complesx with a dilute aqueous wsolution of `NaCN` in the ... nitrogen B. oxygen C. carbon dioxide D. argon
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Native silver metel froms a water solube, complesx with a dilute aqueous wsolution of `NaCN` in the presence of

Description : Native silver metel froms a water solube, complesx with a dilute aqueous wsolution of `NaCN` in the presence of

Last Answer : Native silver metel froms a water solube, complesx with a dilute aqueous wsolution of `NaCN` in the presence of ... B. Oxgen C. `CO_(2)` D. Argin

Native silver metel froms a water solube, complesx with a dilute aqueous wsolution of `NaCN` in the presence of

Description : Native silver metel froms a water solube, complesx with a dilute aqueous wsolution of `NaCN` in the presence of

Last Answer : Native silver metel froms a water solube, complesx with a dilute aqueous wsolution of `NaCN` in the ... Nitrogen B. Oxygen C. Carbon dioxide D. Argon

Statement-1: Extraction of gold from its native ore involves leaching the metal wih dilute solution of NaCN in presence of air. Statement-2:This is an

Description : Statement-1: Extraction of gold from its native ore involves leaching the metal wih dilute solution of NaCN in presence of air. Statement-2:This is an

Last Answer : Statement-1: Extraction of gold from its native ore involves leaching the metal wih dilute solution of ... -1 is false but Statement -2 is true

Assertion: `Ag` and `Au` are extracted by leaching the ores with a dilute solution of `NaCN`. Reason: Impurities associated with these ores dissolve i

Description : Assertion: `Ag` and `Au` are extracted by leaching the ores with a dilute solution of `NaCN`. Reason: Impurities associated with these ores dissolve i

Last Answer : Assertion: `Ag` and `Au` are extracted by leaching the ores with a dilute solution of `NaCN`. ... . Statement-1 is false but Statement -2 is true

A compound, C4H6, reacts with bromine and forms a white precipitate with ammoniacal silver nitrate solution. It reacts with dilute H2SO4 in the presence of mercuric sulfate to form 2-butanone. The compound could be (a) 1-Butyne (b) 1-Butene (c) 2-Butyne (d) 2-Butene

Description : A compound, C4H6, reacts with bromine and forms a white precipitate with ammoniacal silver nitrate solution. It reacts with dilute H2SO4 in the presence of mercuric sulfate to form 2-butanone. The compound could be (a) 1-Butyne (b) 1-Butene (c) 2-Butyne (d) 2-Butene

Last Answer : 1-Butyne

Compound A(`C_7H_8O`)is insoluble in water, dilute HCl & aqueous `NaHCO_3`, it dissolves in dilute NaOH.When A is treatedwith `Br_2` water it is conve

Description : Compound A(`C_7H_8O`)is insoluble in water, dilute HCl & aqueous `NaHCO_3`, it dissolves in dilute NaOH.When A is treatedwith `Br_2` water it is conve

Last Answer : Compound A(`C_7H_8O`)is insoluble in water, dilute HCl & aqueous `NaHCO_3`, it dissolves in dilute NaOH.When A ... . The structure ofA is A. B. C. D.

If a dilute solution of aqueous `NH_(3)` is saturated with `H_(2)S` then the product formed is :

Description : If a dilute solution of aqueous `NH_(3)` is saturated with `H_(2)S` then the product formed is :

Last Answer : If a dilute solution of aqueous `NH_(3)` is saturated with `H_(2)S` then the product formed is : A. `(NH_(4))_( ... (NH_(4))_(2)S_(x)` D. `NH_(4)OH+S`

A white solid reacts with dilute HCI to give colourless gas that de-colourises aqueous bromine. The solid is likely to be.

Description : A white solid reacts with dilute HCI to give colourless gas that de-colourises aqueous bromine. The solid is likely to be.

Last Answer : A white solid reacts with dilute HCI to give colourless gas that de-colourises aqueous bromine. ... chloride C. Sodium acetate D. Sodium thiosulphate

What happen when mango is placed in dilute aqueous soln. of HCl?

Description : What happen when mango is placed in dilute aqueous soln. of HCl?

Last Answer : Ans. When mango is placed in dilute aqueous soln. of HCl it swells. 

. A dilute aqueous solution is to be concentrated in an evaporator system. High pressure steam is available. Multiple effect evaporator system is employed, because (A) Total heat transfer area of all the effects is -less than that in a single effect evaporator system (B) Total amount of vapor produced per Kg of feed steam in a multiple effect system is much higher than in a single effect (C) Boiling point elevation in a single effect system is much higher than that in any effect in a multi-effect system (D) Heat transfer co-efficient in a single effect is much lower than that in any effect in a multi-effect system

Description : . A dilute aqueous solution is to be concentrated in an evaporator system. High pressure steam is available. Multiple effect evaporator system is employed, because (A) Total heat transfer area of ... in a single effect is much lower than that in any effect in a multi-effect system

Last Answer : (B) Total amount of vapor produced per Kg of feed steam in a multiple effect system is much higher than in a single effect

A process stream of dilute aqueous solution flowing at the rate of10 Kg.s -1 is to be heated. Steam condensate at 95°C is available for heating purpose, also at a rate of 10 Kg.s -1 . A 1 - 1 shell and tube heat exchanger is available. The best arrangement is (A) Counter flow with process stream on shell side (B) Counter flow with process stream on tube side (C) Parallel flow with process stream on shell side (D) Parallel flow with process stream on tube side

Description : A process stream of dilute aqueous solution flowing at the rate of10 Kg.s -1 is to be heated. Steam condensate at 95°C is available for heating purpose, also at a rate of 10 Kg.s -1 . A 1 ... side (C) Parallel flow with process stream on shell side (D) Parallel flow with process stream on tube side

Last Answer : (A) Counter flow with process stream on shell side

When dilute aqueous solutions of two salts are mixed, the process is associated with (A) Decrease in temperature (B) Increase in temperature (C) No change in temperature (D) Change in temperature which is a function of composition

Description : When dilute aqueous solutions of two salts are mixed, the process is associated with (A) Decrease in temperature (B) Increase in temperature (C) No change in temperature (D) Change in temperature which is a function of composition

Last Answer : B) Increase in temperature

During the electrolysis of a dilute aqueous solution of sulfuric acid, what happens to the sulfuric acid concentration?

Description : During the electrolysis of a dilute aqueous solution of sulfuric acid, what happens to the sulfuric acid concentration? 

Last Answer : ANSWER: IT REMAINS THE SAME

The theory of interionic attraction attributed to Debye and Hückel: w) was disproved by Arrhenius x) accounts quantitatively for the attraction between ions in dilute aqueous solutions y) does not account for kindered "ion-activity" z) accounts for intra-molecular polar bonds

Description : The theory of interionic attraction attributed to Debye and Hückel: w) was disproved by Arrhenius x) accounts quantitatively for the attraction between ions in dilute aqueous solutions y) does not account for kindered "ion-activity" z) accounts for intra-molecular polar bonds

Last Answer : ANSWER: X -- ACCOUNTS QUANTITATIVELY FOR THE ATTRACTION BETWEEN IONS IN DILUTE AQUEOUS SOLUTIONS

Water solube Amino acid in garlic ? a Allicin b Allin c Both d None

Description : Water solube Amino acid in garlic ? a Allicin b Allin c Both d None

Last Answer : b Allin

“Democracy stands much superior to any other froms of government in promoting dignity and freedom of the individual.” Explain. -SST 10th

Description : “Democracy stands much superior to any other froms of government in promoting dignity and freedom of the individual.” Explain. -SST 10th

Last Answer : Democracy supports dignity and freedom of the citizens. Every man wants to get respect from fellow persons in the society. A lot of conflicts take place among human beings because ... has strengthened the claims of the disadvantaged and discriminated castes for equal status and equal opportunity.

One of the following metals froms a volatile corbony1 compound and this property is taken advantage of its extraction. This metal is

Description : One of the following metals froms a volatile corbony1 compound and this property is taken advantage of its extraction. This metal is

Last Answer : One of the following metals froms a volatile corbony1 compound and this property is taken advantage of its ... . Nickel B. Iron C. Cobalt D. Vanadium

A metel rod of the length 10cm and a rectangular cross-section of 1 cm xx `1//2` cm is connected to a battery across opposite faces. The resistance wi

Description : A metel rod of the length 10cm and a rectangular cross-section of 1 cm xx `1//2` cm is connected to a battery across opposite faces. The resistance wi

Last Answer : A metel rod of the length 10cm and a rectangular cross-section of 1 cm xx `1//2` cm is ... 2)` cm faces D. same irrepective of the three faces

A welded rail joint is generally A. Support on a sleeper B. Sipport on a metel C. Suspended D. None of These

Description : A welded rail joint is generally A. Support on a sleeper B. Sipport on a metel C. Suspended D. None of These

Last Answer : C [Suspended]

An unknown substance (P) functions as weak base in water. It produces silver mirror test. It reacts with dilute `HCl` to produce (Q) which turns blue

Description : An unknown substance (P) functions as weak base in water. It produces silver mirror test. It reacts with dilute `HCl` to produce (Q) which turns blue

Last Answer : An unknown substance (P) functions as weak base in water. It produces silver mirror test. It reacts with dilute `HCl` ... ` C. `NH_(2)OH` D. `HPO_(3)`

An unknown substance (P) functions as weak base in water. It produces silver mirror test. It reacts with dilute `HCl` to produce (Q) which turns blue

Description : An unknown substance (P) functions as weak base in water. It produces silver mirror test. It reacts with dilute `HCl` to produce (Q) which turns blue

Last Answer : An unknown substance (P) functions as weak base in water. It produces silver mirror test. It reacts with dilute `HCl` ... ` C. `NH_(2)OH` D. `HPO_(3)`

10.(a) An ore on treatment with dilute hydrochloric acid produces brisk effervesces. What type of ore is this? What steps will be required to obtain metal from the enriched ore. , (b) Copper coin is kept immersed in silver nitrate solution for some time. What change will take place in coin and colour of the solution ? Write balanced chemical equation of the reaction involved. -Chemistry

Description : 10.(a) An ore on treatment with dilute hydrochloric acid produces brisk effervesces. What type of ore is this? What steps will be required to obtain metal from the enriched ore. , (b) ... in coin and colour of the solution ? Write balanced chemical equation of the reaction involved. -Chemistry

Last Answer : (a) Carbonate ore: (i) Calcination: Carbonate ore is heated in limited supply of air and oxide is obtained, e.g. (b) Copper, being more reactive than silver will displace silver from silver nitrate ... and there will be deposition of silver on copper coin. The colour of solution will turn to blue.

A metal salt solution gives a yellow precipitate with silver nitrate. The precipitate dissolves in dilute nitric acid as well as in ammonium hydroxide

Description : A metal salt solution gives a yellow precipitate with silver nitrate. The precipitate dissolves in dilute nitric acid as well as in ammonium hydroxide

Last Answer : A metal salt solution gives a yellow precipitate with silver nitrate. The precipitate dissolves in dilute nitric acid as ... (3-)` D. `SO_(4)^(2-)`

Why does not silver evolve h2 on reacting with dilute h2so4?

Description : Why does not silver evolve h2 on reacting with dilute h2so4?

Last Answer : Need answer

A gas X is passed through water to form a saturated solution. The aqueous solution on treatment with silver nitrate gives a white precipitate. The sat

Description : A gas X is passed through water to form a saturated solution. The aqueous solution on treatment with silver nitrate gives a white precipitate. The sat

Last Answer : A gas X is passed through water to form a saturated solution. The aqueous solution on treatment with silver nitrate ... (D) X = `H_2`, Y = `Cl_2 `

A gas X is passed through water to form a saturated solution. The aqueous solution on treatment with silver nitrate gives a white precipitate. The sat

Description : A gas X is passed through water to form a saturated solution. The aqueous solution on treatment with silver nitrate gives a white precipitate. The sat

Last Answer : A gas X is passed through water to form a saturated solution. The aqueous solution on treatment with silver nitrate gives ... ` D. `X=H_(2), Y=Cl_(2)`

The major end product (B) of the reaction: `overset(HCI)underset(ZnCl_(2))rarr A overset(1.NaCN("excess"))underset(2.H_(2),Ni)rarr B`

Description : The major end product (B) of the reaction: `overset(HCI)underset(ZnCl_(2))rarr A overset(1.NaCN("excess"))underset(2.H_(2),Ni)rarr B`

Last Answer : The major end product (B) of the reaction: `overset(HCI)underset(ZnCl_(2))rarr A overset(1.NaCN("excess"))underset(2.H_(2),Ni)rarr B` A. B. C. D.

When ZnS and PbS minearls are present together, then NaCN is added to separate them in the froth floatation process as a depressant, because :

Description : When ZnS and PbS minearls are present together, then NaCN is added to separate them in the froth floatation process as a depressant, because :

Last Answer : When ZnS and PbS minearls are present together, then NaCN is added to separate them in the froth ... ]` D. They cannot be separated by adding NaCN

In the leaching of `Ag_(2)S` with `NaCN`, a stream air is also passed. It is because of

Description : In the leaching of `Ag_(2)S` with `NaCN`, a stream air is also passed. It is because of

Last Answer : In the leaching of `Ag_(2)S` with `NaCN`, a stream air is also passed. It is because of A. reversible ... C. both (A) and (B) D. none of the above

When ZnS and PbS minearls are present together, then NaCN is added to separate them in the froth floatation process as a depressant, because :

Description : When ZnS and PbS minearls are present together, then NaCN is added to separate them in the froth floatation process as a depressant, because :

Last Answer : When ZnS and PbS minearls are present together, then NaCN is added to separate them in the froth ... ]` D. They cannot be separated by adding NaCN

`NaCN` is sometimes added in the froth flotation process as a depressant when `ZnS` and `PbS` minerals are expected because `:`

Description : `NaCN` is sometimes added in the froth flotation process as a depressant when `ZnS` and `PbS` minerals are expected because `:`

Last Answer : `NaCN` is sometimes added in the froth flotation process as a depressant when `ZnS` and `PbS` ... D. Sillccious impurities settle down on the bottom.

When ZnS and PbS minearls are present together, then NaCN is added to separate them in the froth floatation process as a depressant, because :

Description : When ZnS and PbS minearls are present together, then NaCN is added to separate them in the froth floatation process as a depressant, because :

Last Answer : When ZnS and PbS minearls are present together, then NaCN is added to separate them in the froth floatation process as ... _(4)]` D. both (1) and (2)

`Ag_(2)S +NaCN rarr (a)` (a) `+Zn rarr (d)` (b) is a metal. Hence `(a)` and `(b)` are

Description : `Ag_(2)S +NaCN rarr (a)` (a) `+Zn rarr (d)` (b) is a metal. Hence `(a)` and `(b)` are

Last Answer : `Ag_(2)S +NaCN rarr (a)` (a) `+Zn rarr (d)` (b) is a metal. Hence `(a)` and `(b)` are A. `Na_(2)[Zn( ... )[Ag(CN)_(4)],Ag` D. `Na_(3)[Ag(CN)_(4)],Ag`

How does NaCN act as a depressant in preventing ZnS from forming the froth ?

Description : How does NaCN act as a depressant in preventing ZnS from forming the froth ?

Last Answer : Ans. NaCN forms a layer of zinc complex, Na2 [Zn (CN)4 ] on the surface of ZnS and thereby prevents it from the formation of froth.

Which of the following pairs of compounds could NOT be used to create a buffer solution? Would it be: w) HCL and NaCl (read: H - C - L and N - A - C - L) x) HCN and NaCN (read: H - C - N and N - A - C - N) y) NH3 and NH4Cl (read: N - H - 3 and N - H - 4 - C - L) z) HNO2 and NaNO2 (read: H - N - O -2 and N - A - N - O - 2)

Description : Which of the following pairs of compounds could NOT be used to create a buffer solution? Would it be: w) HCL and NaCl (read: H - C - L and N - A - C - L) x) HCN and NaCN (read: H - C - N and N - A - C - N) y) NH3 ... - H - 4 - C - L) z) HNO2 and NaNO2 (read: H - N - O -2 and N - A - N - O - 2)

Last Answer : ANSWER: W -- HCL AND NaCl (read: H - C - L and N - A - C - L) 

Silver nitrate solution when added to a colorless aqueous solution E forms a white precipitate which dissolves in excess of E. If the white precipitat

Description : Silver nitrate solution when added to a colorless aqueous solution E forms a white precipitate which dissolves in excess of E. If the white precipitat

Last Answer : Silver nitrate solution when added to a colorless aqueous solution E forms a white precipitate which dissolves in excess ... SO_(3)` D. `Na_(2)SO_(4)`

Silver is displaced when zinc is added to aqueous sodium argento cyanideThis method of extracting silver is an example for

Description : Silver is displaced when zinc is added to aqueous sodium argento cyanideThis method of extracting silver is an example for

Last Answer : Silver is displaced when zinc is added to aqueous sodium argento cyanideThis method of extracting ... Hydro metallurgy C. Pyrometallurgy D. Liquition

Shravani was performing inorganic qualitative analysis of a salt. To an aqueous solution of that salt, she added silver nitrate.

Description : Shravani was performing inorganic qualitative analysis of a salt. To an aqueous solution of that salt, she added silver nitrate.

Last Answer : Shravani was performing inorganic qualitative analysis of a salt. To an aqueous solution ... observations and write the chemical reactions involved.

Two aliphatic aldehydes P and Q react in th presence of aqueous `k_(2)CO_(3)` to give compound R, which upon treatment with HCN provides compound S. O

Description : Two aliphatic aldehydes P and Q react in th presence of aqueous `k_(2)CO_(3)` to give compound R, which upon treatment with HCN provides compound S. O

Last Answer : Two aliphatic aldehydes P and Q react in th presence of aqueous `k_(2)CO_(3)` to give compound R, which ... shown below: The compound S is B. C. D.

Two aliphatic aldehydes (P) and (Q) react in the presence of aqueous `K_(2)CO_(3)` to give compound (R ) which upon treatment with HCN gives compound(

Description : Two aliphatic aldehydes (P) and (Q) react in the presence of aqueous `K_(2)CO_(3)` to give compound (R ) which upon treatment with HCN gives compound(

Last Answer : Two aliphatic aldehydes (P) and (Q) react in the presence of aqueous `K_(2)CO_(3)` to give compound (R ) ... (P) and (Q), respectively, are: B. C. D.

The acidic aqueous solution of ferrous ion forms a brown complex in the presence of `NO_(3)^(Θ)` by the follwing two steps: `[Fe(H_(2)O)_(6)]^(2+) +NO

Description : The acidic aqueous solution of ferrous ion forms a brown complex in the presence of `NO_(3)^(Θ)` by the follwing two steps: `[Fe(H_(2)O)_(6)]^(2+) +NO

Last Answer : The acidic aqueous solution of ferrous ion forms a brown complex in the presence of `NO_(3)^(Θ)` ... + H_(2)O` Complete and balance the equations .

Which of the following reagents is most suitable for preparing chlorobenzene from benzene? (a) Aqueous chlorine (b) Chlorine in the presence of ultraviolet light (c) Chlorine in acetic acid (d) Chlorine in the presence of FeCl3

Description : Which of the following reagents is most suitable for preparing chlorobenzene from benzene? (a) Aqueous chlorine (b) Chlorine in the presence of ultraviolet light (c) Chlorine in acetic acid (d) Chlorine in the presence of FeCl3

Last Answer : Chlorine in the presence of FeCl3

Propyne reacts with aqueous H2SO4 in the presence of HgSO4 to form (a) acetone (b) 1-propanol (c) acetaldehyde (d) 2-propanol

Description : Propyne reacts with aqueous H2SO4 in the presence of HgSO4 to form (a) acetone (b) 1-propanol (c) acetaldehyde (d) 2-propanol

Last Answer : acetone

Which of the following elements does not occur in nature as a native ore? w) silver x) gold y) platinum z) aluminum

Description : Which of the following elements does not occur in nature as a native ore? w) silver x) gold y) platinum z) aluminum

Last Answer : ANSWER: Z -- ALUMINUM

A metal that does NOT occur native in the earth is w) copper x) gold y) sodium z) silver

Description : A metal that does NOT occur native in the earth is w) copper x) gold y) sodium z) silver

Last Answer : ANSWER: Y -- SODIUM 

Drinks remain hot or cold for a long time in a thermos flask because of the (a) presence of air, which is a bad conductor of heat, in between the double walls (b) silver coating on the inside of the double walls (c) vacuum between the double walls (d) combined effects of (b) and (c)

Description : Drinks remain hot or cold for a long time in a thermos flask because of the (a) presence of air, which is a bad conductor of heat, in between the double walls (b) silver coating on the inside of the double walls (c) vacuum between the double walls (d) combined effects of (b) and (c)

Last Answer : Ans:(d)

The appearance of a silver mirror in Tollens' test indicates the presence of : (a) an aldehyde (b) a ketone (c) an alcohol (d) an alkene

Description : The appearance of a silver mirror in Tollens' test indicates the presence of : (a) an aldehyde (b) a ketone (c) an alcohol (d) an alkene

Last Answer : an aldehyde

Ethylene reacts with oxygen in the presence of silver catalyst at 300°C to form (a) Diethyl ether (b) Ethylene glycol (c) Ethyl alcoho(d) Ethylene oxidel

Description : Ethylene reacts with oxygen in the presence of silver catalyst at 300°C to form (a) Diethyl ether (b) Ethylene glycol (c) Ethyl alcohol (d) Ethylene oxide

Last Answer : Ethylene oxide

Write balanced chemical equations for the following reactions: (a) Dilute sulphuric acid reacts with aluminium powder. (b) Dilute hydrochloric acid reacts with sodium carbonate. (c) Carbon dioxide is passed through lime water. -Chemistry

Description : Write balanced chemical equations for the following reactions: (a) Dilute sulphuric acid reacts with aluminium powder. (b) Dilute hydrochloric acid reacts with sodium carbonate. (c) Carbon dioxide is passed through lime water. -Chemistry

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