Description : Among the metals Na,Mg ,Al,Zn,Cu,Sn ,Fe and Pb number of metals that can be ectreated by the eletroysis ,even from aqueos solution,is………………….
Last Answer : Among the metals Na,Mg ,Al,Zn,Cu,Sn ,Fe and Pb number of metals that can be ectreated by the eletroysis ,even from aqueos solution,is………………….
Description : How many of the following metals can be extracted buy carbon reduction method ? Na,Al,Mg,Sn,Fe,Pb,Zn,Ca
Last Answer : How many of the following metals can be extracted buy carbon reduction method ? Na,Al,Mg,Sn,Fe,Pb,Zn,Ca
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
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.
Description : Brass is an alloy of : (1) Cu, Al and Zn (2) Cu and Sn (3) Cu and Zn (4) Al and Mg
Last Answer : (3) Cu and Zn Explanation: Brass is an alloy made of copper and zinc. The proportions of zinc and copper can be varied to cre-ate a range of brasses with varying properties. By comparison, bronze is principally an alloy of copper and tin.
Last Answer : Cu and Zn
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 : 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`
Description : Soils with high pH are generally deficient in:? a Zn and Mn b B and Fe c Cu and Mo d Ca and Mg
Last Answer : a Zn and Mn
Description : The wire of flash bulbs is made up of – (1) Mg (2) Ba (3) Cu (4) Ag
Last Answer : (1) Mg Explanation: The wire of flash bulbs is made up of magnesium. Magnesium filaments are contained in bulbs filled with oxygen gas, and electrically ignited by a contact in the camera shutter.
Description : The wire of flash bulbs is made up of (1) Mg (2) Ba (3) Cu (4) Ag
Last Answer : Mg
Description : Identify the type of reaction(s) in the following equations. (i)CH4 + 2O2 CO2 + 2 H2O (ii) Pb(NO3)2 + 2KI ——–>Pbl2 + 2KNOs (iii) CaO + H2O ——–> Ca(OH)2 (iv) CuSO4 + Zn ——–> ZnSO4 + Cu -Chemistry
Last Answer : Answer. (i) Combustion reaction and oxidation reaction. (ii)Double displacement reaction and precipitation reaction. (iii) Combination reaction. (iv) Displacement reaction.
Description : The metal that does not give H2 on treatment with dilute HCl is (a) Zn (b) Fe (c) Ag (d) Ca
Last Answer : Ans:(c)
Description : The deficiencies of micronutrients, not only affect growth of plants but also vital functions such as photosynthetic and mitochondrial electron flow. Among the list given below, which group of three elements shall affect most, both ... , Mo (b) Ca, K, Na (c) Mn, Co, Ca (d) Cu, Mn, Fe
Last Answer : d) Cu, Mn, Fe
Description : 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)
Last Answer : (B) Noble metals (Ag, Pt, Au)
Description : Bessemerisation is carried out for: (P) Fe, (Q) Cu, (R )Al, (S) Ag
Last Answer : Bessemerisation is carried out for: (P) Fe, (Q) Cu, (R )Al, (S) Ag A. I,II B. II,III C. III,IV D. I,III
Description : Cold dil. `H_(2)SO_(4)` will completely dissolve : (i) Pb (ii) `Fe_(3)O_(4)` (iii) Fe (iv) Cu (v) Mg (vi) MgO (vii) `CoCO_(3)` (viii) `CuCO_(2)` (ix)
Last Answer : Cold dil. `H_(2)SO_(4)` will completely dissolve : (i) Pb (ii) `Fe_(3)O_(4)` (iii) Fe (iv) Cu (v) ... ) `CoCO_(3)` (viii) `CuCO_(2)` (ix) `SrCO_(3)`
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)
Description : IN which set do all elements tend to form anions in binary ionic compounds Question 3 options N S I Ca B K K Ga Pb Fe Hg Na?
Last Answer : Need answer
Description : Hot dipping process is used for coating a low melting point metal (e.g. Pb, Sn, Zn) on iron, steel & copper having relatively higher melting points. Which of the following is not a hot dipping process? (A) Galvanising (B) Tinning (C) Sherardizing (D) None of these
Last Answer : (C) Sherardizing
Description : Citrate is converted to isocitrate by aconitase which contains (A) Ca++ (B) Fe++ (C) Zn++ (D) Mg++
Last Answer : B
Description : Which of the following metals are present in hemoglobin and chlorophyll, respectively? (1) Fe and Mg (2) Fe and Zn (3) Mg and Zn (4) Zn and Mg
Last Answer : (1) Fe and Mg Explanation: Fe and Mg metals are present in hemoglobin and Chlorophyll respectively.
Description : German Silver is an alloy of------? A. Zn + Ni B. Cu + Zn C. Cu + Ni (Answer) D. Cu + Sn E. None of these
Last Answer : C. Cu + Ni (Answer)
Description : Constantan is an alloy of (A) Cu (55%) & Sn (45%) (B) Cu (55%) & Ni (45%) (C) Pt (95%) & Rh (10%) (D) Fe (80%) & Ni (20%)
Last Answer : (B) Cu (55%) & Ni (45%)
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
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
Description : Gray spots of oat are caused by deficiency of (a) Cu (b) Zn (c) Mn (d) Fe.
Last Answer : (c) Mn
Description : The trace metal present in insulin is (A) Cu (B) Zn (C) Fe (D) Ni
Last Answer : (B) Zn
Description : What is the odd one out of elements Li Na K Fe?
Last Answer : What is the answer ?
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.
Description : Various fungi are known to accumulate considerable quantities of divalent metals, e.g. (a) Cd (b) Zn (d) All of these (c) Pb
Last Answer : Ans. ((d))
Description : Which one of the following elements is not an essential micronutrient for plant growth? (a) Zn (b) Cu (c) Ca (d) Mn
Last Answer : (c) Ca
Description : Element necessary for the middle lamella is (a) Ca (b) Zn (c) K (d) Cu.
Last Answer : (a) Ca
Description : Radioactive materials should be kept in the container made of : (1) Fe (2) Al (3) Pb (4) Steel
Last Answer : (4) Steel Explanation: Radioactive materials are first encased in resin or concrete and sealed in steel drums. The drums are then packed into concrete casks and placed in concrete trenches up to 18 metres deep.
Last Answer : Steel
Description : Which mineral element controls the activity of Nitrate reductase ? (A) Fe (B) Mo (C) Zn (D) Ca
Last Answer : Answer : A
Description : Which is essential for the growth of root tip? (a) Zn (b) Fe (c) Ca (d) Mn
Description : Which of the following metals is used in Space Crafts to withstand high temperatures? (1) Fe (2) Ti (3) Ni (4) Pb
Last Answer : (2) Ti Explanation: Titanium alloy, which has high corrosion resistance, high specific strength, and good heat resistance, is used for different spacecraft parts including outer fuel tank sheathing and wings. It is extremely strong at high temperatures.
Description : Which of the following metals is used in Space Crafts to withstand high temperatures ? (1) Fe (2) Ti (3) Ni (4) Pb
Last Answer : Ti
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
Description : Among the following, the number of elements showing only one non-zero oxidation state is: O,Cl,F,N,P,Sn,Tl,Na,Ti
Last Answer : Among the following, the number of elements showing only one non-zero oxidation state is: O,Cl,F,N,P,Sn,Tl,Na,Ti
Description : A cofactor required for the activity of the enzyme ALA dehydratase is (A) Cu (B) Mn (C) Mg (D) Fe
Description : The core metal of chlorophyll is (a) Ni (b) Cu (c) Fe (d) Mg.
Last Answer : d) Mg.
Description : Mineral associated with cytochrome is (a) Cu (b) Mg (c) Cu and Mg (d) Fe.
Last Answer : (d) Fe.
Description : Bessemerization is carried out for (I) Fe (II) Cu (III) Al (IV) silver
Last Answer : Bessemerization is carried out for (I) Fe (II) Cu (III) Al (IV) silver A. I,II B. II,III C. I,III D. All
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 : 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 : Which one of the following elements is almost non- essential for plants? (a) Zn (b) Na (c) Ca (d) Mo
Last Answer : (b) Na