Which one occupies the lowermost position in the electromotive series of metals? (A) Aluminium (B) Noble metals (Ag, Pt, Au) (C) Zinc (D) Alkali metals (K, Na, Li)

Which one occupies the lowermost position in the electromotive series of
metals?
(A) Aluminium
(B) Noble metals (Ag, Pt, Au)
(C) Zinc
(D) Alkali metals (K, Na, Li)
by

1 Answer

Answer :

(B) Noble metals (Ag, Pt, Au)
by

Related questions

(A) Au,Pt,Ag etc are found in free state (R ) The metals which are noble and chemically less reactive are found in free state

Description : (A) Au,Pt,Ag etc are found in free state (R ) The metals which are noble and chemically less reactive are found in free state

Last Answer : (A) Au,Pt,Ag etc are found in free state (R ) The metals which are noble and chemically less reactive ... D. If (A) is incorrect but (R ) is correct

Which one of the alkali metals, forms only, the normal oxide, M2O on heating in air (1) Na (2) Rb (3) K (4) Li

Description : Which one of the alkali metals, forms only, the normal oxide, M2O on heating in air (1) Na (2) Rb (3) K (4) Li

Last Answer : Li

Number of metals among following which are obatained by electromentallurgy in molten state are Li, Ba, Na,Al, Fe, Cu, Pb, Sn, Ag, Zn, Ca, Mg.

Description : Number of metals among following which are obatained by electromentallurgy in molten state are Li, Ba, Na,Al, Fe, Cu, Pb, Sn, Ag, Zn, Ca, Mg.

Last Answer : Number of metals among following which are obatained by electromentallurgy in molten state are Li, Ba, Na,Al, Fe, Cu, Pb, Sn, Ag, Zn, Ca, Mg.

Which of the following is an electrolytic cell A. lron * (ll) * (Fe) oxidized, aluminum (Al) reduced O B. Silver (Ag) oxidized, gold (Au) reduced C. Aluminum () oxidized (Zn) reduced LithiumD. (Li) oxidized, (Zn) reduced?

Description : Which of the following is an electrolytic cell A. lron * (ll) * (Fe) oxidized, aluminum (Al) reduced O B. Silver (Ag) oxidized, gold (Au) reduced C. Aluminum () oxidized (Zn) reduced LithiumD. (Li) oxidized, (Zn) reduced?

Last Answer : The answer is not c.

Cold conc. `HNO_(3)` will completely dissolve: (i) Pb (ii) `Pb_(3)O_(4)` (iii) Fe (iv) Sn (v) Mg (vi) MgO (vii) Hg (viii) Au (ix) Ag (x) Pt

Description : Cold conc. `HNO_(3)` will completely dissolve: (i) Pb (ii) `Pb_(3)O_(4)` (iii) Fe (iv) Sn (v) Mg (vi) MgO (vii) Hg (viii) Au (ix) Ag (x) Pt

Last Answer : Cold conc. `HNO_(3)` will completely dissolve: (i) Pb (ii) `Pb_(3)O_(4)` (iii) Fe (iv) Sn (v) Mg (vi) MgO (vii) Hg (viii) Au (ix) Ag (x) Pt

Cold conc. `HNO_(3)` will completely dissolve: (i) Pb (ii) `Pb_(3)O_(4)` (iii) Fe (iv) Sn (v) Mg (vi) MgO (vii) Hg (viii) Au (ix) Ag (x) Pt

Description : Cold conc. `HNO_(3)` will completely dissolve: (i) Pb (ii) `Pb_(3)O_(4)` (iii) Fe (iv) Sn (v) Mg (vi) MgO (vii) Hg (viii) Au (ix) Ag (x) Pt

Last Answer : Cold conc. `HNO_(3)` will completely dissolve: (i) Pb (ii) `Pb_(3)O_(4)` (iii) Fe (iv) Sn (v) Mg (vi) MgO (vii) Hg (viii) Au (ix) Ag (x) Pt

The metals occuring at the lower most position in the electromotive series (A) Do not resist corrosion (B) Resist corrosion very strongly (C) Are very brittle (D) Are heat insulators

Description : The metals occuring at the lower most position in the electromotive series (A) Do not resist corrosion (B) Resist corrosion very strongly (C) Are very brittle (D) Are heat insulators

Last Answer : (B) Resist corrosion very strongly

How many of following metals impart a characteristic colour to the Bunsen flame ? `(i) Na " " (ii) Li " " (iii) K " " (iv) Ba` `(v) Sr " " (vi) Mg " "

Description : How many of following metals impart a characteristic colour to the Bunsen flame ? `(i) Na " " (ii) Li " " (iii) K " " (iv) Ba` `(v) Sr " " (vi) Mg " "

Last Answer : How many of following metals impart a characteristic colour to the Bunsen flame ? `(i) Na " " (ii) Li " " (iii) K ... ix) `Be " " (x )Ca " " (x i)Cu`

Metal at the top of the electromotive series is (A) Least active (B) Most stable (C) Most active (D) Most noble

Description : Metal at the top of the electromotive series is (A) Least active (B) Most stable (C) Most active (D) Most noble

Last Answer : (C) Most active

Leaching can be used for the extraction of which metals (i) Pb (ii) Al (iii) Ag (iv) Au

Description : Leaching can be used for the extraction of which metals (i) Pb (ii) Al (iii) Ag (iv) Au

Last Answer : Leaching can be used for the extraction of which metals (i) Pb (ii) Al (iii) Ag (iv) Au A. (ii) (iii) and ... iii) C. (ii) and (iv) D. (iii) and (iv)

The reagent needed to convert 2-butyne to cis-2-butene is : (a) H2/Pt (b) H2/Lindlar’s catalyst (c) Li/NH3 (d) Na/NH3

Description : The reagent needed to convert 2-butyne to cis-2-butene is : (a) H2/Pt (b) H2/Lindlar’s catalyst (c) Li/NH3 (d) Na/NH3

Last Answer : H2/Lindlar’s catalyst

What is the most active group of nonmetals noble gases alkaline earth halogens alkali metals?

Description : What is the most active group of nonmetals noble gases alkaline earth halogens alkali metals?

Last Answer : The most active metals are alkali metals.The most active nonmetals are halogens.

Who has the most active group of nonmetals noble gases alkaline earth halogens alkali metals?

Description : Who has the most active group of nonmetals noble gases alkaline earth halogens alkali metals?

Last Answer : Kevin

Na, K, Li, which of the elements is the largest in size and which is the smallest in size ?

Description : Na, K, Li, which of the elements is the largest in size and which is the smallest in size ?

Last Answer : Among the elements Na, K, Li, Potassium ( K) is the largest in atomic size and Lithium ( Li) is the smallest in atomic size.

Ionic mobility of `Li^(+)` is less than `Na^(+) and K^(+)` because

Description : Ionic mobility of `Li^(+)` is less than `Na^(+) and K^(+)` because

Last Answer : Ionic mobility of `Li^(+)` is less than `Na^(+) and K^(+)` because A. ionisation potential of lithium is ... `Li^(+)` D. `Li^(+)` keeps two electrons.

What is the odd one out of elements Li Na K Fe?

Description : What is the odd one out of elements Li Na K Fe?

Last Answer : What is the answer ?

The increasing order of reactivity among group 1 elements is Li<Na<K<Rb<Cs whereas among the group 17 elements, it is F>Cl>Br>I. Explain.

Description : The increasing order of reactivity among group 1 elements is Li

Last Answer : Ans. In group 1 elements (alkali metals) the reactivity of the metals is mainly due to the electron releasing tendency of their atoms, which is related to ionization enthalpy, Since ... electron gain enthalpy. Since both of them decrease down the group, the reactivity therefore decreases.

Among Li, Na, K, Rb, Cs, the element with lowest ionization energy is________

Description : Among Li, Na, K, Rb, Cs, the element with lowest ionization energy is________

Last Answer : Ans. Cs has lowest ionization enthalpy.

The element from the elements Li, Na, K, having the least number of electron shells is

Description : The element from the elements Li, Na, K, having the least number of electron shells is

Last Answer : Li.

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

In the elctrolysis refinin of copper, Ag and Au are found:

Description : In the elctrolysis refinin of copper, Ag and Au are found:

Last Answer : In the elctrolysis refinin of copper, Ag and Au are found: A. on cathode B. on anode C. iin the acidic mud D. in the cathodic mud

What is the symbol of Gold? A. Ag B. Au (Answer) C. S D. None

Description : What is the symbol of Gold? A. Ag B. Au (Answer) C. S D. None

Last Answer : B. Au (Answer)

Which of the following commercial metals is most abundantly found in India? (A) Copper (B) Aluminium (C) Nickel (D) Zinc

Description : Which of the following commercial metals is most abundantly found in India? (A) Copper (B) Aluminium (C) Nickel (D) Zinc

Last Answer : (B) Aluminium

Which of the following metals is not subjected to electrolytic refining/purification? (A) Copper (B) Zinc (C) Tin (D) Aluminium

Description : Which of the following metals is not subjected to electrolytic refining/purification? (A) Copper (B) Zinc (C) Tin (D) Aluminium

Last Answer : (C) Tin

Electrometallurgical methods of metal extraction is normally used for those metals (A) Whose oxide/ore is not reduced by carbon (B) Which fall in the category of alkali & alkaline earth metals (C) Which stands higher in the electrochemical series of the metal (D) All (A), (B) & (C)

Description : Electrometallurgical methods of metal extraction is normally used for those metals (A) Whose oxide/ore is not reduced by carbon (B) Which fall in the category of alkali & alkaline earth metals (C) Which stands higher in the electrochemical series of the metal (D) All (A), (B) & (C)

Last Answer : (D) All (A), (B) & (C)

2 ml each of concentrated HCl, HNO3 and a mixture of concentrated hydrochloric acid and Concentrated nitric acid in the ratio of 3:1were taken in test tubes labelled as A, B and C, A small piece of metal was put in each test tube. No change occurred in test tubes A and B but the metal dissolved in test tube C. The metal could be: A) Al B) Au C) Pt D) Cu

Description : 2 ml each of concentrated HCl, HNO3 and a mixture of concentrated hydrochloric acid and Concentrated nitric acid in the ratio of 3:1were taken in test tubes labelled as A, B and C, A small piece of metal was put in ... the metal dissolved in test tube C. The metal could be: A) Al B) Au C) Pt D) Cu

Last Answer : B) Au

The IUPAC name of the complex `[PT(en)(NH_(3))(cl)_(2)(ONO)][Ag(CN)_(2)]` is :

Description : The IUPAC name of the complex `[PT(en)(NH_(3))(cl)_(2)(ONO)][Ag(CN)_(2)]` is :

Last Answer : The IUPAC name of the complex `[PT(en)(NH_(3))(cl)_(2)(ONO)][Ag(CN)_(2 ... (ethane-1,2-diammine) nitritioplatinum(IV) dicyanoargentate (I)

The metals with very low melting points which melts by the temperature of palm are A) Sodium and potassium B) Lead and magnesium C) Aluminium and zinc D) Gallium and caesium

Description : The metals with very low melting points which melts by the temperature of palm are A) Sodium and potassium B) Lead and magnesium C) Aluminium and zinc D) Gallium and caesium

Last Answer : D) Gallium and caesium

Two cells connected in series have electromotive force of 1.5 V each. Their internal resistances are `0.5 Omega` and `0.25 Omega` respectively. This c

Description : Two cells connected in series have electromotive force of 1.5 V each. Their internal resistances are `0.5 Omega` and `0.25 Omega` respectively. This c

Last Answer : Two cells connected in series have electromotive force of 1.5 V each. Their internal ... potential differnce across the terminals of each cell.

Statement-I : In the extraction of Ag, the complex `Na[Ag(CN)_(2)]` is reacted with `Zn` Statement-II : `Zn` is transition metal according to electron

Description : Statement-I : In the extraction of Ag, the complex `Na[Ag(CN)_(2)]` is reacted with `Zn` Statement-II : `Zn` is transition metal according to electron

Last Answer : Statement-I : In the extraction of Ag, the complex `Na[Ag(CN)_(2)]` is reacted with `Zn` ... . Statement-1 : is false , statement-2 : is true

Statement-1: Zn displaces Ag from the complex `Na[Ag(CN)_(2)]` to give `Na_(2)[Zn(CN)_(4)]` Statement-2:Zn is more electro positive than silver

Description : Statement-1: Zn displaces Ag from the complex `Na[Ag(CN)_(2)]` to give `Na_(2)[Zn(CN)_(4)]` Statement-2:Zn is more electro positive than silver

Last Answer : Statement-1: Zn displaces Ag from the complex `Na[Ag(CN)_(2)]` to give `Na_(2)[Zn(CN)_(4) ... false D. Statement-1 is false but Statement -2 is true

Which of the following is incorrect? (a) Mercury: Hg (b) Silver: Ag (c) Sodium: Na (d) Potassium: Ka

Description : Which of the following is incorrect? (a) Mercury: Hg (b) Silver: Ag (c) Sodium: Na (d) Potassium: Ka

Last Answer : Ans:(d)

The metal used to recover copper from a solution of copper sulfate is - (1) Na (2) Ag (3) Hg (4) Fe

Description : The metal used to recover copper from a solution of copper sulfate is - (1) Na (2) Ag (3) Hg (4) Fe

Last Answer : (4) Fe Explanation: The metal used to recover copper from a solution of copper sulfate is Fe.

Which of the following will replace hydrogen from acids to form salts? (1) S (2) Na (3) Ag (4) P

Description : Which of the following will replace hydrogen from acids to form salts? (1) S (2) Na (3) Ag (4) P

Last Answer : (2) Na Explanation: All acids contain hydrogen atom (s). Dilute acids react with some metals such as Sodium, Potassium, Calcium, iron, etc to form salts. Sodium replaces two hydrogen atoms from Sulfuric acid (H2SO4) to form a normal salt, Sodium Sulphate (Na2SO4).

Which of the following will replace hydrogen from acids to form salts ? (1) S (2) Na (3) Ag (4) P

Description : Which of the following will replace hydrogen from acids to form salts ? (1) S (2) Na (3) Ag (4) P

Last Answer : Na

The equation, NA = (DAB . Pt /RTZ . PBM) (PA1 - PA2 ) is for (A) Fick's second law of diffusion (B) Steady state diffusion for stagnant case (C) Liquid M.T.C. by Higbie penetration theory (D) None of these

Description : The equation, NA = (DAB . Pt /RTZ . PBM) (PA1 - PA2 ) is for (A) Fick's second law of diffusion (B) Steady state diffusion for stagnant case (C) Liquid M.T.C. by Higbie penetration theory (D) None of these

Last Answer : (B) Steady state diffusion for stagnant case

Within a given period of the periodic table, the element with the lowest ionization energy is: w) transition metal x) alkali metal y) halogen z) noble gas

Description : Within a given period of the periodic table, the element with the lowest ionization energy is: w) transition metal x) alkali metal y) halogen z) noble gas

Last Answer : ANSWER: X -- ALKALI METAL

Why is Zinc and not Copper used for the recovery of Silver from the complex [Ag (CN)2 ] ?

Description : Why is Zinc and not Copper used for the recovery of Silver from the complex [Ag (CN)2 ] ? 

Last Answer : Ans. Zinc is stronger reducing agent and more electropositive than Copper. (E° = + 0.34V) 

Among the metals Ti,V,W,Zr th and Au the number of metals purified van arkel method are…….

Description : Among the metals Ti,V,W,Zr th and Au the number of metals purified van arkel method are…….

Last Answer : Among the metals Ti,V,W,Zr th and Au the number of metals purified van arkel method are…….

(a) If the radius of the Br ion is 0.182 nm, how large a cation can fit in each of the tetrahedral hole. (b) AgI crystallizes in a cubic closed packed ZnS structure. What fraction of tetrahedral site is occupied by Ag ion ? (c) At what temp. range, most of the metals becomes super conductors ?

Description : (a) If the radius of the Br ion is 0.182 nm, how large a cation can fit in each of the tetrahedral hole. (b) AgI crystallizes in a cubic closed packed ZnS structure. What fraction of tetrahedral site ... Ag ion ?  (c) At what temp. range, most of the metals becomes super conductors ?

Last Answer : (a) For a tetrahedron the limiting ratio is 0.225 – 0.414 For largest cation highest value 0.414 would be considered. r + / r– = 0.414 r + = 0.414 × 0.182 = 0.075 nm. (b) In FCC there are 8 tetrahedral voids. Out of this ½ is occupied by Ag cation. (c) 2 k – 5 k.

Is zinc less reactive with potassium based from activity series of metals?

Description : Is zinc less reactive with potassium based from activity series of metals?

Last Answer : Yes, zinc is LESS reactive than potassium based on the activityseries.

Give three reasons to explain why Japan occupies a leading position among the fishing nations of the world. -Geography

Description : Give three reasons to explain why Japan occupies a leading position among the fishing nations of the world. -Geography

Last Answer : Japan is a country of islands whose coast is dotted with four thousand villages of fishermen with several safe ports which help in fishing. Japan has large continental shelf which is ideal for the ... These big ships are floating factories as the fish is packed and exported from the ship itself.

Textile industry occupies a unique position in Indian economy '. Support the statement with appropriate arguments. -SST 10th

Description : Textile industry occupies a unique position in Indian economy '. Support the statement with appropriate arguments. -SST 10th

Last Answer : Textile industry occupies a unique position in Indian economy: 1. It contributes enormously to industrial production (14%), 4% to the GDP and almost a quarter of the foreign exchange earnings. 2. It ... and produces from raw material to highest value-added products i.e. complete in the value chain.

India occupies an important strategic position in south Asia. Discuss. -Geography 9th

Description : India occupies an important strategic position in south Asia. Discuss. -Geography 9th

Last Answer : India's subcontinent mostly located on Central Asia to the Northwest. Indian subcontinent totally related with South Asia and these are not changing never. India and South Asia are political, ... fora. India and Asia are also strongly connected by military training, counter terrorism coordination.

Hydrogen occupies a unique position in Modern Periodic Table". Justify the statement.

Description : Hydrogen occupies a unique position in Modern Periodic Table". Justify the statement.

Last Answer : Hydrogen occupies a unique position in Modern Periodic Table". Justify the statement.

Which state in India occupies the same ranking position in respect of area and population? (1) Manipur (2) Meghalaya (3) Nagaland (4) Gujarat

Description : Which state in India occupies the same ranking position in respect of area and population? (1) Manipur (2) Meghalaya (3) Nagaland (4) Gujarat

Last Answer : (2) Meghalaya Explanation: The position of Meghalaya is 22nd in terms of both area as well as population. The position of rest of the states in terms of area and population respectively are: Nagaland: ... -Maram, Paomata, and Purul sub-divisions of Senapati district of Manipur); and Gujarat: 7, 10.

A product's _____ is the place it occupies in the minds of consumers relative to competing brands : 1. segment 2. position 3. attribute 4. image 5. perceptual map

Description : A product's _____ is the place it occupies in the minds of consumers relative to competing brands : 1. segment 2. position 3. attribute 4. image 5. perceptual map

Last Answer : image

If a body floating in a liquid occupies a new position and remains at rest in this new position, when given a small angular displacement, the body is said to be in __________ equilibrium. (A) Neutral (B) Stable (C) Unstable (D) None of these

Description : If a body floating in a liquid occupies a new position and remains at rest in this new position, when given a small angular displacement, the body is said to be in __________ equilibrium. (A) Neutral (B) Stable (C) Unstable (D) None of these

Last Answer : Answer: Option A

A product's _________ is the place it occupies in the minds of consumers relative to competing brands: A)segment B)position C)attribute D)image

Description : A product's _________ is the place it occupies in the minds of consumers relative to competing brands: A)segment B)position C)attribute D)image

Last Answer : B)position

Which one of the following is not a metal catalyst for the hydrogenation of an alkene? (a) Pd (b) Pt (c) Na(d) Ni

Description : Which one of the following is not a metal catalyst for the hydrogenation of an alkene? (a) Pd (b) Pt (c) Na (d) Ni

Last Answer : Na