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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. |
Ferric alum gives deep red colour with `NH_(4)SCN` due to the formation of `:`A. `AI(SCN)_(3)`B. `[Fe(SCN)_(3)]^(-)`C. `Fe(SCN)_(3)`D. None of these |
| Answer» Correct Answer - C | |
| 102. |
Among the following, how many compound(s) destroy nitrite in the solution and does not form even traces of nitrate? `AgNO_(3),NH_(4)CI,(NH_(2)CONH_(2)+dil.HCI_`, sulphamic acid, (thiourea +dil. `CH_(3)COOH),(FeSO_(4)+` dil `CH_(3)COOH)` |
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Answer» Correct Answer - 1 Sulphamic acid |
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| 103. |
Which one of the following metal salts produced a blue coloured bead in cobalt nitrate charcoal cavity test?A. `ZN^(2+)`B. `Mg^(2+)`C. `Sn^(2+)`D. `AI^(3+)` |
| Answer» Correct Answer - D | |
| 104. |
Which letter in the diagram depicts the hottest portion of a Bunsen burner flame? A. AB. BC. CD. D |
| Answer» Correct Answer - C | |
| 105. |
If crimson flame is given when an inorganic mixture is tested by flame test, it may be due to the presence of:A. potassiumB. strontiumC. bariumD. calcium |
| Answer» Correct Answer - B | |
| 106. |
`Na_(2)S_(2)O_(3).5H_(2)O` is heated strongly to produce `M,N` and water. Both are consisting of S. Mention the average oxidaion state of S in M and N respectively.A. `-2,+5`B. `-2,+4`C. `-(2)/(5),+6`D. `-2,+4` |
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Answer» Correct Answer - C `Na_(2)S_(2)O_(3).5H_(2)O overset(Delta)rarr Na_(2)SO_(4)+Na_(2)S_(5)` |
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| 107. |
Statement-1:Baryta water becomes turbid on passing `CO_(2)` gas through it but turbidity becomes clear on passing more `CO_(2)` gas. Statement-2 : Carbonates give yellowish white precipitate with silver nitrate solution.The precipitate becomes yelllow or brown on heating.A. Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement-1.B. Statement-1 is True, Statement-2- is True, Statement-2 is NOT a correct explanation for Statement-4C. Statement-1 is True, Statement-2 is FalseD. Statement-1 is False, Statement-2 is True |
| Answer» Correct Answer - B | |
| 108. |
Copper becomes green when exposed to moist air for a long period. This is due to:A. the formation of a layer of cupric oxide no the surface of copper.B. the formation of basic copper sulphate layer on the surface of the metalC. the formation of a layer of cupric hydroxide on the surface of copperD. the formation of a layer of basic carbonate of copper on the surface of copper |
| Answer» Correct Answer - D | |
| 109. |
When `CrO_(3)` is heated then .....+.... are formed.A. `Cr_(2)O_(3),O_(2)`B. `CrO_(2),O_(2)`C. `Cr_(2)O_(7)^(-2),O_(2)`D. None of these |
| Answer» Correct Answer - A | |
| 110. |
When `KMnO_(4)` is heated then which of the following compound is formed?A. `K_(2)MnO_(4)+MnO_(2)`B. `K_(2)MnO_(4)+MnO`C. `MnO_(2)+MnO`D. No change |
| Answer» Correct Answer - A | |
| 111. |
Select the correct statements:A. Hydrated `Co^(+2)` salt is pinkB. Anhydrous `Co^(+2)` salt is of blue colourC. Hybridisation of `CoCI_(2).6H_(2)O` is `sp^(3)d^(2)`D. All of the above |
| Answer» Correct Answer - D | |
| 112. |
When `NaH_(2)PO_(4)` is heated then which of the following compound is formed?A. `Na_(4)P_(2)O_(7)`B. `Na_(3)PO_(4)`C. `HPO_(3)`D. `NaPO_(3)` |
| Answer» Correct Answer - D | |
| 113. |
Which of the following metal sulphate will give `SO_(2)` and `SO_(3)` both gaseous product on heating?A. `CuSO_(4)`B. `FeSO_(4)`C. `Fe_(2)(SO_(4))_(3)`D. `CaSO_(4)` |
| Answer» Correct Answer - B | |
| 114. |
Dead burnt plaster isA. `CaSO.(1)/(2)H_(2)O`B. `CaSO_(4).2H_(2)O`C. `CaSO_(4)` (anhy)D. None of these |
| Answer» Correct Answer - C | |
| 115. |
Anion that cannot decolourise acidic solution of `KMnO_(4)`:A. `HCO_(3)^(-)`B. `HSO_(3)^(-)`C. `SO_(3)^(2-)`D. all of these |
| Answer» Correct Answer - A | |
| 116. |
Which of the following group reagent is preferred to give vinegar-like odour on warming?A. dil. `H_(2)SO_(4)`B. conc. `H_(2)SO_(4)`C. (conc. `H_(2)SO_(4)+C_(2)H_(5)OH)`D. conc. `HNO_(3)` |
| Answer» Correct Answer - A | |
| 117. |
Statement-1: `NO_(3)^(-)` and `NO_(2)^(-)` both do not give brown fumes with dil `H_(2)SO_(4)` Statement-2: Protonation of `NO_(2)^(-)` is more easier compared to `NO_(3)^(-)` since `NO_(3)^(-)` is more stable by resonance.A. Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement-1.B. Statement-1 is True, Statement-2- is True, Statement-2 is NOT a correct explanation for Statement-45C. Statement-1 is True, Statement-2 is FalseD. Statement-1 is False, Statement-2 is True |
| Answer» Correct Answer - A | |
| 118. |
Which of the following combinations shall give rod azo dye with `HNO_(2)`? (II) `(KMnO_(4)+dil. H_(2)SO_(4))` (IV) `(FeSO_(4)+dil. CH_(3)COOH)`A. Reaction with (I) followed by reaction with (II)B. Reaction with (II) followed by reaction with (I)C. Reaction with only (III)D. Reaction with only (IV) |
| Answer» Correct Answer - A | |
| 119. |
Which of the following pair of salts produces gas lacking pungent odour with dil. `H_(2)SO_(4)`?A. `HCO_(3)^(-)` and `HSO_(3)^(-)`B. `HCO_(3)^(-)` and `CO_(3)^(2-)`C. `S_(2)O_(3)^(2-)` and `CH_(3)CO_(2)^(-)`D. `CO_(3)^(2-)` and `CH_(3)CO_(3)^(-)` |
| Answer» Correct Answer - B | |
| 120. |
Which of the following pair of species can be separated by dil. `HCI`?A. `Hg(NO_(3))_(2)` and `Hg_(2)(NO_(3))_(2)`B. `AgNO_(3)` and `Hg(NO_(3))_(2)`C. `Fe(OH)_(3)` and `AI(OH)_(3)`D. `HgS` and `MnS` |
| Answer» Correct Answer - A::B::D | |
| 121. |
When bismuth chloride is poured into a large volume of water the white precipitate produced of:A. `BiO.OH`B. `Bi_(2)O_(3)`C. `BiOH`D. `Bi(OH)_(3)` |
| Answer» Correct Answer - C | |
| 122. |
Which reagents produce a gas when combined? (P) `HCI` and `Na_(2)SO_(3)` (Q) `NaOH` and `AI`A. P onlyB. Q onlyC. Both P and QD. Neither P nor Q |
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Answer» Correct Answer - C `Na_(2)SO_(3) +HCI rarr SO_(2) uarr, NaOH +AI rarr H_(2) uarr` |
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| 123. |
`CO_(3)^(2-)+2HCI` (dil.) `rarr` Gas + Solution Resulting gas produces salt when passed in:A. `NaOH` solutionB. `NH_(4)OH` solutionC. lime waterD. all of these |
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Answer» Correct Answer - D `NaOH +CO_(2) rarr Na_(2)CO_(3),` `NH_(4)OH+CO_(2) rarr (NH_(4))_(2)CO_(3)` Lime water `+CO_(2) rarr` Milky `(CaCO_(3))` |
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| 124. |
The sulphide ion gives purple colour which sodium nitroprusside. The purple colour is due to the formation of:A. `Na_(4)[Fe(CN)_(3)(NOS)_(3)]`B. `Na_(4)[Fe(CN)_(4)(NOS)_(2)]`C. `Na_(4)[Fe(CN)_(5)(NOS)]`D. `Na_(4)[Fe(NOS)_(6)]` |
| Answer» Correct Answer - C | |
| 125. |
Observe the following experiment: Which of the following reaction is/are correctly matched about set-I and set-II?A. `Na_(2)S_(2)O_(3)+2HCI rarr S (darr) +H_(2)SO_(3)+2NaCI`B. `Na_(2)S_(2)O_(3)+2HCI overset(Delta)rarr S(darr) +SO_(2)(uarr) +2NaCI +H_(2)O`C. `3SO_(2)+Cr_(2)O_(7)^(2-)+2H^(+) rarr 2Cr^(3+)+3SO_(4)^(2-)+H_(2)O`D. `S + H_(2)SO_(3) overset(Delta)rarr H_(2)S_(2)O_(3)` |
| Answer» Correct Answer - A::B::C::D | |
| 126. |
Identify type of reaction between `F(g)` and `C(g)`:A. ion cexchangeB. disproportionationC. comproportionationD. none of these |
| Answer» Correct Answer - C | |
| 127. |
Which of the following interfering radicals form volatile product with conc. `H_(2)SO_(4)`?A. `PO_(4)^(3-)`B. `F^(-)`C. `C_(2)O_(4)^(2-)`D. `CO_(3)^(2-)` |
| Answer» Correct Answer - B::C | |
| 128. |
When 6 M hydrochloric acid is added to an unknonw white solid, a colourless gas is produced. What is a possible identify for this solid?A. Calcium nitrateB. Copper (II) chlorideC. Potassium sulphateD. Sdium carbonate |
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Answer» Correct Answer - D `Na_(2)CO_(3)+2HCI rarr 2NaCI +H_(2)O +CO_(2)` |
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| 129. |
Among the following, brownish black colour metal sulphide is:A. `CoS`B. `Bi_(2)S_(3)`C. `CdS`D. `MnS` |
| Answer» Correct Answer - B | |
| 130. |
Identify the correct statement:A. The ppt. of `BaCO_(3)` is insoluble in dil `HCI`B. `Hg(NO_(3))_(2)+ Na_(2)S rarr` White ppt of HgSC. `Na_(2)CO_(3)+Hg(NO_(3))_(2)rarr` Reddish-brown ppt of `3HgO.HgCO_(3)`D. `H_(2)S` turns lime water milky |
| Answer» Correct Answer - C | |
| 131. |
When solid `NaF` is treated with conc. `H_(2)SO_(4)` in a test tube, followed by warming, then dimeric form of a gas is evolved, by which the test tube acquires a greasy appearance on its walls. Subsequently, the gas liberated when brought in contact with moistened glass rod forms a deposit which contains:A. `SiF_(4)`B. `H_(2)SiF_(6)`C. `SiO_(2).H_(2)O`D. `H_(2)SiO_(3)` |
| Answer» Correct Answer - B::C::D | |
| 132. |
An inorganic compound A is dissolved in dilute hydrochloric acid and is then warmed. A colourless gas B is produced. When a filter paper moistened with potassium iodate and the strach solution is exposed to the gas it turns blue. The gas B and the compound A are:A. `SO_(2)` and `Na_(2)SO_(3)`B. `SO_(3)` and `Na_(2)SO_(4)`C. `H_(2)S` and `Na_(2)S`D. `H_(2)S` and `Na_(2)SO_(3)` |
| Answer» Correct Answer - A | |
| 133. |
A one litre flask is full of reddish brown bromine fumes. The intensity of brown colour of vapour will not decrease appreciably on adding to the flask some :A. pieces of marbleB. animal charcal powderC. carbon tetrachlorideD. carbon disulphide |
| Answer» Correct Answer - A | |
| 134. |
Statement-1: In neutral solution, there is partial precipitation of zinc sulphide by hydrogen sulphide gas. Statement-2: The complete precipitation of zinc sulphide takes place by hydrogen sulphide gas when alkali metal acetate is added to the solution.A. Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement-1.B. Statement-1 is True, Statement-2- is True, Statement-2 is NOT a correct explanation for Statement-31C. Statement-1 is True, Statement-2 is FalseD. Statement-1 is False, Statement-2 is True |
| Answer» Correct Answer - B | |
| 135. |
When `H_(2)S` gas a passed through an ammonical salt solution X, a slightly white precipitate is formed. The X can be:A. a cobalt saltB. a lead saltC. a zinc saltD. a silver salt |
| Answer» Correct Answer - C | |
| 136. |
Which of the following thermal decomposition yields a basic as well as an acidic oxide ?A. `Na_(2)CO_(3)`B. `CaCO_(3)`C. `NaNO_(3)`D. All are correct |
| Answer» Correct Answer - B | |
| 137. |
`B(OH)_(3)+NaOH rarr Na[B(OH)_(4)]+H_(2)O` How can this reaction is made to proceeds in forward direction ?A. Addition of cis-1,2-diolB. Addition of boraxC. Addition of trans-1,2-diolD. Addition of `Na_(2)HPO_(4)` |
| Answer» Correct Answer - A | |
| 138. |
`Na_(2)C_(2)O_(4)+` conc. `H_(2)SO_(4) overset("Warmed")rarr` Gases evolved: Which of the following characteristic(s) is/are correct regarding gases evolved above?A. It can turn the lime water milkyB. It can burn with blue flameC. It can turn the `PdCI_(2)` solution blackD. |
| Answer» Correct Answer - A::C::D | |
| 139. |
A mixture upon along adding conc. `H_(2)SO_(4)` gives deep red fumes. It may contain the anions pair `:`A. `Cr_(2)O_(3),O_(2)`B. `Br^(-)` and `Cr_(2)O_(7)^(2-)`C. `NO_(3)^(-)` and `CI^(-)`D. `CrO_(4)^(2-)` and `NO_(3)^(2-)` |
| Answer» Correct Answer - A | |
| 140. |
Statement-1: Chromium ions give gree precipitate of `Cr(OH)_(3)` with `Na_(2)CO_(3)` solution. Statement-2: `Cr(OH)_(3)` precipitate is slightly soluble in excess of ammonia solution in the cold forming a violet or pink coloured complex, hexaammine chromium (III) ion.A. Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement-1.B. Statement-1 is True, Statement-2- is True, Statement-2 is NOT a correct explanation for Statement-30C. Statement-1 is True, Statement-2 is FalseD. Statement-1 is False, Statement-2 is True |
| Answer» Correct Answer - B | |
| 141. |
A colourless solution is known to contain one of these ions. Which ion is present if adding dilute HCI produces a white precipiate that dissolves when the solution is warmed?A. `Ag^(+)`B. `Cu^(2+)`C. `Hg_(2)^(2+)`D. `Pb^(2+)` |
| Answer» Correct Answer - D | |
| 142. |
`CaC_(2)O_(4)+AcOH overset(Na_(2)CO_(3))underset("Solution")rarr(X)`, then X is:A. clear solutionB. white ppt. of `CaCO_(3)` is obtainedC. no change in the composition of pptD. yellow ppt is ontained |
| Answer» Correct Answer - C | |
| 143. |
`BO_(3)^(3-) + underset("conc")(H_(2)SO_(4))overset(Delta)rarr underset("White fumes")((P))` `BO_(3)^(3-) +underset("conc")(H_(2)SO_(4)) +C_(2)H_(5)OH overset(Delta)rarr underset("vapours")((Q))` P and Q are respectively:A. `H_(3)BO_(3),H_(3)BO_(3)`B. `(C_(2)H_(5))_(3)BO_(3),H_(3)BO_(3)`C. `(C_(2)H_(5))_(3)BO_(3),(C_(2)H_(5))_(3)BO_(3)`D. `H_(3)BO_(3),(C_(2)H_(5))_(3)BO_(3)` |
| Answer» Correct Answer - D | |
| 144. |
In fifth group, `(NH_(4))_(2)CO_(3)` is added to precipitate out the carbonates. We do not add `Na_(2)CO_(3)` because:A. `CaCO_(3)` is soluble in `Na_(2)CO_(3)`B. `Na_(2)CO_(3)` increases the solubility of fifth group carbonatesC. `MgCO_(3)` will be precipitated out in fifth groupD. none of the above |
| Answer» Correct Answer - C | |
| 145. |
Which of the following acidic radicals produce colourless gas with dilute `HCI` which does not react with oxidising agent?A. `CO_(3)^(2-)`B. `SO_(3)^(2-)`C. `S^(2-)`D. All of these |
| Answer» Correct Answer - A | |
| 146. |
Find the number of reagents in which `Ag_(2)S` is insoluble. hot conc.`HNO_(3), (NH_(4))_(2)S, NH_(3),KCN, Na_(2)S_(2)O_(3)` |
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Answer» Correct Answer - 4 `(NH_(4))_(2)S, NH_(3), KCN, Na_(2)S_(2)O_(3)` |
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| 147. |
Which of the following acid radical does not produce white ppt. with `Pb(OAc)_(2)` solution?A. `Br^(-)`B. `S_(2)O_(3)^(2-)`C. `CO_(3)^(2-)`D. None of these |
| Answer» Correct Answer - D | |
| 148. |
In above reaction amyl alcohol is recommended. Dimethyl ether is not recommended for general use owing to its:A. highly non-flammable characterB. highly inflammable characterC. highly poisonous characterD. none of the above |
| Answer» Correct Answer - B | |
| 149. |
`CrCl_(3) underset(NH_(4)OH)overset(NH_(4)Cl)to (A) underset(H_(2)O)overset(Na_(2)O_(2))to (B) underset("acetate")overset("Lead")to(C)` In this reaction sequence, the compound (C) is:A. `Na_(2)CrO_(4)`B. `Na_(2)Cr_(2)O_(7)`C. `Cr(OH)_(3)`D. `PbCrO_(4)` |
| Answer» Correct Answer - D | |
| 150. |
Salt is a mixed form of acidic and basic radical. The confirmatory test of basic and acidic radicals by using chemical reagent is called qualitative analysis. Precipitation reaction is used for the confirmatory test of radicals. Which of the following iodide has scarlet red colour?A. `PbI_(2)`B. `HgI_(2)`C. `AgI`D. All of these |
| Answer» Correct Answer - B | |