InterviewSolution
Saved Bookmarks
InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
Spiegel (or spiegleisen), used in the manufacture of steel by the Bessemer process is an alloy of?A. Iron, nickel and carbonB. Iron, managnese and carbonC. Iron, tungsten and carbonD. Iron, chromium and carbon |
| Answer» Correct Answer - B | |
| 102. |
Which pari of elements can form alloy?A. Zn and PbB. Fe and HgC. Fe and CrD. C and Pt |
|
Answer» Correct Answer - C Zn and Pb, Fe and Hg, C and Pt do not form alloy. |
|
| 103. |
Roasting is carried out in case of:A. galenaB. iron pyritesC. copper galenaD. all of the above |
|
Answer» Correct Answer - D Roasting is generally done for sulphide ores. |
|
| 104. |
Which one of the following reactions is an example for calcination processA. `2Ag+2HCl+[O]to2AgCl+H_(2)O`B. `2Zn+O_(2) to 2ZnO`C. `2ZnS+3O_(2) to 2ZnO+2SO_(2)`D. `MgCO_(3) to MgO+O_(2)` |
|
Answer» Correct Answer - D Calcination is heating of the ore in absence of air. |
|
| 105. |
Balance the following reaction: `Al_(2)O_(3).2H_(2)O+xNaOHG+H_(2)O to xNa[Al(OH)_(4)]` What is the value of x? |
|
Answer» Correct Answer - 2 `Al_(2)O_(3).2H_(2)O+2NaOH+H_(2)O to 2Na[Al(OH)_(4)]` |
|
| 106. |
How many different compounds are present in carnallite? |
|
Answer» Correct Answer - 3 `KCl.MgCl_(2).6H_(2)O` |
|
| 107. |
Magnesium is extracted from ore carnallite by :A. the self reduction processB. the carbon-reduction processC. the elctrolytic processD. treating the ore with aqueous NaCN and then reducing the mixture |
| Answer» Correct Answer - C | |
| 108. |
Chemical leaching is useful in the concentration of:A. carnalliteB. bauxiteC. galenaD. zinc blende |
|
Answer» Correct Answer - B Chemical leaching is useful in conc, of `Al_(2)O_(3)`. |
|
| 109. |
Which of the following is not an ore?A. BauxiteB. CorundumC. LangbeiniteD. Argetite |
|
Answer» Correct Answer - C langbenite is a mineral of K and Mg used in fertilizer industry. |
|
| 110. |
Which of the following is not an ore of IronA. LimoniteB. CassiteiteC. MagnetiteD. None of these |
|
Answer» Correct Answer - B `SnO_(2)`, cassiterite is an ore of tin. |
|
| 111. |
Black tin is:A. an alloy of SnB. an allotrope of SnC. 60-70% `SnO_(2)`D. 100%`SnO_(2)` |
|
Answer» Correct Answer - C Black tin `Rightarrow60-70%SnO_(2)` |
|
| 112. |
Which material has beem named incorrectlyA. Bauxite : `Al_(2)O_(3).2H_(2)O`B. Corundum: `Al_(2)O_(3)`C. Cryolite: `3NaF.AlF_(3)`D. Feldspar:`Be_(3)Al_(2)Si_(6)O_(18)` |
|
Answer» Correct Answer - D Feldspar`KAlSi_(3)O_(8)to NaAlSi_(3)O_(8)to CaAl_(2)Si_(2)O_(8)` |
|
| 113. |
Which of the following statements is/are correct?A. Froth floatation can also be used for non sulphide ores having sulphide impurities, and the ore is recovered by using suitable activator.B. In the leaching of `Ag_(2)S` with NaCN, a stream of air is also passed because of reversible nautre of reaction between `Ag_(2)S and NaCN`C. In hydrometallurgy, Zn is used as an oxidizing agent in the purification of Ag from `[Ag(CN)_(2)]^(-)`D. Roasting can convert sulphide into oxide or sulphate and apart of sulphide mau also act as a reducing agent |
| Answer» Correct Answer - A,B,D | |
| 114. |
`4M(s)+overset(Ө)(C)N(aq.)+2H_(2)O(aq.)+O_(2)(g)` `" " to 4[M(CN)_(2)]^(Ө)(aq.)+4overset(Ө)(O)H(aq.)A. `O_(2)` acts as oxidising agentB. `overset(Ө)(CN)` acts as complex forming agentC. `O_(2)` and `overset(Ө)(CN)` both act as oxidising agentD. `O_(2)` and `overset(Ө)(CN)` both act as complex forming agent |
| Answer» Correct Answer - A,B | |
| 115. |
Statement-1:Nickel is purified by the thermal decomposition of nickel tetracaerbonyl. Statement-2: Nickel is a transition element.A. Statement-1 is True, Statement-2 is True, Statement-2 is a correct explantion for Statement-1.B. Statement-1 is True, Statement-2 is True, Statement-2 is not a correct explantion for Statement-1.C. Statement-1 is True, Statement-2 is False.D. Statement-1 is True, Statement-2 is True. |
| Answer» Correct Answer - B | |
| 116. |
`Ti` can be purified by Van Arkel process. `TiI_(4)` is a volatile compound which decomposes at a high temperature.A. Statement-1 is True, Statement-2 is True, Statement-2 is a correct explantion for Statement-1.B. Statement-1 is True, Statement-2 is True, Statement-2 is not a correct explantion for Statement-1.C. Statement-1 is True, Statement-2 is False.D. Statement-1 is True, Statement-2 is True. |
| Answer» Correct Answer - A | |
| 117. |
Statement-1: Alkali metal can not prepared by the elctrolysis of their chlorides in aqueous solution. Statement-2: Reduction potentials of alkali metals cations is much lower than that `H_(2)O`.A. Statement-1 is True, Statement-2 is True, Statement-2 is a correct explantion for Statement-1.B. Statement-1 is True, Statement-2 is True, Statement-2 is not a correct explantion for Statement-1.C. Statement-1 is True, Statement-2 is False.D. Statement-1 is True, Statement-2 is True. |
| Answer» Correct Answer - A | |
| 118. |
`M+NaCN+O_(2)+H_(2)O to Na[M(CN)_(2)]+NaOH` Which of the following elements gets dissolved in samme manner in NaCN solution?A. AgB. CuC. AuD. Pt |
| Answer» Correct Answer - A,C | |
| 119. |
Which one of the following reactions occur during smelting in the reduction zone at lower temperature(in iron metallurgy)?A. `CaO+SiO_(2) to CaSiO_(3)("slag")`B. `Fe_(2)O_(3)+3C to 2Fe+3CO`C. `3Fe_(2)O_(3)+CO to 2Fe_(3)O_(4)+CO_(2)`D. `CO_(2)+C to 2CO` |
| Answer» Correct Answer - C | |
| 120. |
Which of the following is/are manufactured by the electrolysis of their fused salts?A. copperB. SodiumC. AluminiumD. Platinum |
| Answer» Correct Answer - B,C | |
| 121. |
Which does not represent correct method ?A. `TiCl_(2)+2Mg to Ti+2MgCl_(2) : "Kroll"`B. `Ni(CO)_(4) to Ni+4CO : "Mond"`C. `Ag_(2)CO_(3) to 2Ag+CO_(2)+O_(2) : "Van Arkel"`D. `ZrI_(4) to Zr+2I_(2) : "Van Arkel"` |
| Answer» Correct Answer - C | |
| 122. |
The method of zone refining of metals is based on the principle of:A. greater mobility of the pure metal than that of impurityB. higher melting point of the impurity than that of the pure metalC. greater noble character of the solid metal than that of the impurityD. greater solubility of the impurity of the impurity in the molten state than in solid |
| Answer» Correct Answer - D | |
| 123. |
Which of the following is not an ore:A. Malachite CalamineB. CalamineC. StelliteD. Cerussite |
| Answer» Correct Answer - C | |
| 124. |
In roasting:A. moisture is removedB. non metal as their volatile oxide are removedC. ore become porousD. all of the above |
| Answer» Correct Answer - D | |
| 125. |
Oxidation of ore involved in:A. calcination of calamineB. heating of haematite with aluminumC. roasting of galenaD. None of these |
| Answer» Correct Answer - C | |
| 126. |
Many gemstone are impure from of:A. `Al_(2)O_(3)`B. `Cr_(2)O_(3)`C. `Mn_(3)O_(4)`D. None of these |
| Answer» Correct Answer - A | |
| 127. |
Roasting process is used for:A. impure of `Fe_(2)O_(3)`B. `CuFeS_(2)`C. ZnSD. all of these |
| Answer» Correct Answer - D | |
| 128. |
Which one of thte following reaction is an example for calcination process?A. `2Ag+2HCl+(O) to 2AgCl+H_(2)O`B. `2Zn+O_(2) to 2ZnO`C. `2ZnS+3O_(2) to 2ZnO+2SO_(2)`D. `MgCO_(3) to MgO+CO_(2)` |
| Answer» Correct Answer - D | |
| 129. |
Which of the following is not an ore of IronA. MalachiteB. CalamineC. Salt cakeD. Cerussite |
| Answer» Correct Answer - C | |
| 130. |
The benefication of the sulphide ores is usually done by:A. electrolysisB. smelting processC. metal dispalacement methodD. Froth floatation method |
| Answer» Correct Answer - D | |
| 131. |
Which of the following set of elements mostly occur as sulphide ores.A. Zn,Cu,MgB. Zn,Cu,PbC. Fe,Al,TiD. Cu,Ag,Au |
| Answer» Correct Answer - B | |
| 132. |
In van Arkel method, if `I_(2)` is introducted at `1800K` anode impure zironium metal, the product will be:A. iodide of the metalB. pure metalC. impurities react with iodineD. none of these |
| Answer» Correct Answer - D | |
| 133. |
If the impurity in a metal has a greater affinity for oxygen and is more easily oxidised than the metal, then the purification of metal may be carried out byA. liquaitonB. distillationC. zone reffingD. cupellation |
| Answer» Correct Answer - D | |
| 134. |
Mercury is purified by:A. passing through dilute `HNO_(3)`B. distillationC. distributionD. vapour phase refining |
| Answer» Correct Answer - B | |
| 135. |
Partin of gold may be done with:A. sulphuric acidB. sodium hydroxideC. boraxD. Chlorine`(Cl)_(2)` |
| Answer» Correct Answer - A,D | |
| 136. |
Poling is used for the purification of:A. SnB. CuC. PbD. Zn |
| Answer» Correct Answer - A,B | |
| 137. |
Poling method is used for the purification of:A. Pb and SnB. Pb and CrC. Sn and CuD. Fe and Pb |
| Answer» Correct Answer - C | |
| 138. |
The process of zone refining is used for `:`A. siliconB. germaniumC. galliumD. all of these |
| Answer» Correct Answer - D | |
| 139. |
Van Arkel method of purification of metals involves converting the metal toA. volatile stable compoundB. volatile unstable compoundC. non-volatile compoundD. none of the above |
| Answer» Correct Answer - B | |
| 140. |
`M overset(KCN_(aq.)Air)to [M(CN)_(2)]^(-)("soluble in water")` `M overset(Delta,C)to [M(CO)_(4)]^(-)("volatile complex")` `M overset(I_(2),Delta)to MI_(4)^(-)("volatile iodide")` Metals in reaction (i),(ii) and (iii) are respectivelyA. Au,Ni,TiB. Ni,Au,TiC. Ag,Zn,TiD. Ag,Ni,Pb |
| Answer» Correct Answer - A | |
| 141. |
Consider the following statement: Statement-1: Poiling process is used to refinning of copper and lead. Statement-2: The scavenger which is used in the manufacture of steel is maganese. Statement-3: The chemical comosition of mattert in `Cu_(2)O+Cu_(2)S`. Statement-4: In the extraction of aluminium from aluminia `Al_(2)O_(3)` undergoes dissociation. And arrange in the order of ture/falseA. FTFFB. TTFFC. FFTTD. TTFT |
| Answer» Correct Answer - A | |
| 142. |
Zone refinning is based on the principle of:A. fractional distillationB. fractional crystallisationC. partition coefficientD. chromatographic separation |
| Answer» Correct Answer - B | |
| 143. |
Poiling process is used for:A. the removal of `Cu_(2)O from Cu`B. the removal of `Al_(2)O_(3) from Al`C. the removal `Fe_(2)O_(3) from Fe`D. Purification of silver |
| Answer» Correct Answer - A | |
| 144. |
The slag consists of molten impurities, generally, in the form ofA. metal carbonateB. it liberates oxygen on heatingC. metal oxideD. metal nitrate |
| Answer» Correct Answer - B | |
| 145. |
Among the following statements, the incorrect one isA. calamine and siderite are carbonate oresB. argentite and curprite are oxide oresC. zinc blende and pyrites are sulphide oresD. malachite and azrites are ores of cupper |
| Answer» Correct Answer - B | |
| 146. |
What will occur if a block of copper metal is dropped into a beaker containing a solution of `1M ZnSO_(4)`?A. The copper metal will dissolve and zinc metal will be deposited.B. No reactio will occur.C. The copper metal will dissolve with evolution oxygen gas.D. The copper metal will dissolve with evolution of hydrogen gas. |
| Answer» Correct Answer - B | |
| 147. |
Poiling process:A. `"reduces" SnO_(2) "to" Sn`B. oxidises impurities like iron and removes them as scumC. uses green polesD. all of the above are correct |
| Answer» Correct Answer - D | |
| 148. |
Select the statement which is correct?A. In Ellingham diagram `M to MO` curves are having negative slope.B. MgO can be reduced by carbon at very high temperature`(approx1800^(@)C)`C. In blast furnace, carbon not reduce iron oxidesD. Extraction of metals are based upon oxidation |
| Answer» Correct Answer - B | |
| 149. |
Find the number of curves which are wrongly presented in the Elingham diagran. |
|
Answer» Correct Answer - 4 c,d,e,f |
|
| 150. |
Find the total number of feasible reaction which would yeild free metal. (a) `HgS+O_(2) underset(Delta)overset(600^(@)C)to Hg+SO_(2)` (b) `HgS+2HgO overset(Delta)to 3Hg+SO_(2)` (c ) `CuSO_(4)+3CO to 3Cu+2SO_(2)` (d) `Fe_(2)O_(3)+3CO overset(Delta)to 2Fe+3CO_(2)` (e) `Fe_(2)O_(3)+3C overset(Delta)to 2Fe+3CO` (f) `ZnSO_(4)+2C overset(Delta)to Zn+SO_(2)+2CO` (g) `4Cu_(2)O+CH_(4) to 8Cu+2H_(2)O+CO_(2)` (h) `2Na[Au(CN)_(2)]+Zn to Na_(2)[Zn(CN)_(4)]+2Au` |
|
Answer» Correct Answer - 7 a,b,c,d,e,g,h f `ZnSO_(4)+2C overset(Delta)to ZnS+4CO` |
|