InterviewSolution
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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.
| 301. |
Which of the following do not convert into oxide on heating ?A. `Li_(2)CO_(3)`B. `K_(2)CO_(3)`C. `CaCO_(3)`D. `MgCO_(3)` |
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Answer» Correct Answer - B |
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| 302. |
Smaller the size of ionA. Greater is the electron effinityB. Greater the degree of hydrationC. Lesser the degree of hydrationD. Lesser the polarising power |
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Answer» Correct Answer - A::B |
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| 303. |
With increase in the size of the alkali metal ion, the stability of super oxides increases due toA. Decrease in hydration energyB. Increase in hydration energyC. Decrease in littic energyD. Increase in lattie energy |
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Answer» Correct Answer - D |
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| 304. |
Which one of the following statements about water is false ?A. Water can act both as acid and as a baseB. There is extensive intramolecular hydrogen bonding in the condensed phaseC. Ice formed by heavy water sinks in normal waterD. Water is oxidised to oxygen during photosynthesis |
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Answer» Correct Answer - B |
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| 305. |
`Xoverset(CoCl_(2))rarrCaCl_(2)+Yuarr,` the effective ingredient of X is :A. `OCl^(-)`B. `Cl^(-)`C. `OCl^(+)`D. `OCl_(2)^(-)` |
| Answer» Correct Answer - A | |
| 306. |
Caesium is the most reactive metal in the alkali metal series becauseA. it exerts considerable attractive force on valence electronsB. it is a heavier metalC. its incomplete shell is nearest to the nucleusD. its valence electron has the highest principal quantum number than the valence electron of any of the others. |
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Answer» Correct Answer - d When valence electron is in the highest quantum shell, the ionisation energy is lowest and hence, reactivity is highest. |
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| 307. |
Which of the following metal is most reactive ?A. NaB. KC. MgD. Pb |
| Answer» Correct Answer - B | |
| 308. |
Which is maximum reactive towards water ?A. LiB. KC. NaD. Rb |
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Answer» Correct Answer - D Reactivity with water increases down the group of alkali metals. |
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| 309. |
Sodium metal is highly reactive and cannot be stored in :A. tolueneB. kerosene oilC. alcoholD. benzene |
| Answer» Correct Answer - C | |
| 310. |
Large -scale source of florine isA. `CaF_(2)`B. `MgF_(2)`C. `BaF_(2)`D. `BeF_(2)` |
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Answer» Correct Answer - 1 |
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| 311. |
Alkali metals give coloue in Bunsen flame due to :A. Low electrongativeitB. One electron in outer most orbitC. Smaller atomic radiiD. Low ionisation energy |
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Answer» Correct Answer - D |
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| 312. |
Alkali metals give colour in bunsen flame due to-A. Low electronegativityB. One `e^(-)` in outer most orbitC. Smaller atomic radiiD. Low ionisation energy |
| Answer» Correct Answer - D | |
| 313. |
Which of the following is highly exothermic in water.A. `Mg^(2+)`B. `Ba^(2+)`C. `Be^(2+)`D. `Ca^(2+)` |
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Answer» Correct Answer - 3 |
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| 314. |
Which alkaline earth metal compound is volatileA. `Be_(3)N_(2)`B. `Mg_(3)N_(2)`C. `Ca_(3)N_(2)`D. None |
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Answer» Correct Answer - A `Be_(3)N_(2) rarr` Covalent character |
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| 315. |
Which of the following is neither deliquescent nor efflorscent and is used for wool washing ?A. `NaOH`B. `KOH`C. `NaHCO_(3)`D. `Na_(2)CO_(3).NaCO_(3).2H_(2)O` |
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Answer» Correct Answer - D Sodium sesquicarbonate `(Na_(2)CO_(3).NaCO_(3).2H_(2)O)` is neither deliquescent nor efflorescent and is used for wool washing. |
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| 316. |
The deliquescent among the following is :A. `CaCl_(2)`B. `FeSO_(4).7H_(2)O`C. `CuSO_(4).5H_(2)O`D. `BaCl_(2).2H_(2)O` |
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Answer» Correct Answer - A |
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| 317. |
Group-2 elements are called alkaline earth metals exceptA. MgB. BeC. RaD. Ca |
| Answer» Correct Answer - B | |
| 318. |
The most reactive elements isA. BeB. BaC. SrD. Mg |
| Answer» Correct Answer - B | |
| 319. |
The fluorspar isA. `CaSO_(4)`B. `BaSO_(4)`C. `CaF_(2)`D. `CaCO_(3)` |
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Answer» Correct Answer - 3 |
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| 320. |
Which of the following is /are correct statement?A. `Ca_(3)(PO_(4))_(2)` is part of bones.B. `3Ca_(3)(PO_(4))_(2).CaF_(2)`is part of enamel on teeth.C. `Ca^(2+)` ions are important in blood clotting.D. All of the above are correct |
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Answer» Correct Answer - D |
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| 321. |
The colour of sulphates of II A group metals areA. YellowB. BlackC. WhiteD. Blue |
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Answer» Correct Answer - 3 |
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| 322. |
`MgSO_(4) overset("lampblack") rarr MgO+Auarr+Buarr` Then the incorrect statement regarding A and B is :A. both A and B turns lime water milkyB. both A and B contains `ppi-dpi` bondsC. both A and B are acidic oxidesD. both A and B are acid anhydrides |
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Answer» Correct Answer - B |
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| 323. |
`Ca_(2+)` can stopA. BleedingB. InfectionC. Bone growthD. All |
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Answer» Correct Answer - 1 |
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| 324. |
The least ionic chloride is formed byA. MgB. CaC. BeD. Sr |
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Answer» Correct Answer - C Being small in size and more electronegative , Be forms least ionic or more covalent chloride . |
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| 325. |
Which of the follwing has no reaction with water?A. BaB. SrC. BeD. Mg |
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Answer» Correct Answer - 3 |
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| 326. |
The least ionic chloride is given byA. CaB. MgC. BeD. Ba |
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Answer» Correct Answer - 3 |
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| 327. |
Which of the following are the correct reasons for anomlaous behaviour of lithium?A. Exceptionally small size of its atomB. Its high polarising powerC. It has high degree of hydrationD. Exceptionally low ionisation enthalpy |
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Answer» Correct Answer - A::B (a) and (b) are both correct |
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| 328. |
Which of the following statements regarding Be is /are true? (I) It forms covalent compounds almost exclusivlty , evan with the highly eletronegative elements (II) It does not form ionic compounds containing simple `Ber^(+)` ion , but does readily acheve a maximum coordination mumberof fopur through formation of complex ions such as and `BeF_(4)^(2-)[Be(H_(2)))_(4)]^(2+)`. (III) it forms a series of organo derivatives `BeR_(2)` and `[BeR_(3)]`,which contain covalent Be-C bonds. (IV) Its halides are covalent polymers that are readilty hyrolysed or cleaved by donors.A. All are correctB. I,ii & iv onlyC. I,iii &iv onlyD. I,ii,&iii only |
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Answer» Correct Answer - 2 |
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| 329. |
Select the incorrect statementsA. KOH is a stronger base then NaOHB. MILk of magnesia is an aqueous suspension of mg`(OH)_(2)`C. `CaO_(2)` is less stable then`MgO_(2)`D. `BaC_(2)O_(4)` is soluble in acetic acid |
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Answer» Correct Answer - 4 |
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| 330. |
Carbon can be oxidised to `C_(2)` while heating its powder with :A. `SO_(2)`B. `KNO_(3)`C. `K_(2)CO_(3)`D. `FeS_(2)` |
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Answer» Correct Answer - B |
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| 331. |
What happens when sodium metal is heated in axcess of dry air containing carbon dioxide gasA. `Na_(2)O_(2)` is formed.B. `Na_(2)O` is formed.C. `Na_(2)CO_(3)` is formed.D. `Na_(3)N` is formed. |
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Answer» Correct Answer - C |
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| 332. |
The alkaline earth metals forming ionic oxides areA. BeOB. MgOC. CaOD. SrO |
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Answer» Correct Answer - B::C::D BeO is covalent while other oxides are ionic . |
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| 333. |
`k_(2)CO_(3)` cannot be prepared by solvay process becauseA. `K_(2)CO_(3)` is inoluble in waterB. `KHCO_(3)` is soluble in waterC. `K_(2)CO_(3)`is unstableD. All the above |
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Answer» Correct Answer - B |
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| 334. |
Which of the following will have highest hydroration energy ?A. `Li^(+)`B. `Na^(+)`C. `Be^(2+)`D. `Mg^(2+)` |
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Answer» Correct Answer - 3 |
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| 335. |
Color of alkalimetals in liquid ammonis is due toA. Solvated electronsB. Solvated `M^(+)` ionsC. Colloidal formationD. Scattering of light |
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Answer» Correct Answer - A |
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| 336. |
Alkalimetals which are used in photoelectric cells areA. Na & KB. Li & NaC. K & LiD. K & Cs |
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Answer» Correct Answer - D |
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| 337. |
Beryllium compopunds are largely conalent becauseA. Electronegtivity of beryllium is very highB. Polarising power of `Be^(2+)` is very highC. Berylliujm atom is very largeD. Beryllium is a metal |
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Answer» Correct Answer - 2 |
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| 338. |
Maximum heat of formations is shown byA. `Be(OH)_(2)`B. `Mg(OH)_(2)`C. `Ca(OH)_(2)`D. `Ba(OH)_(2)` |
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Answer» Correct Answer - 4 |
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| 339. |
The number of water molecules in hydrated beryllium compounds are largely conalant becauseA. 6B. 3C. 2D. 4 |
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Answer» Correct Answer - 4 |
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| 340. |
The correct statement isA. Na is more reactive than KB. Oxidation state of Na in `Na_(2)O_(2)` is +1C. IP of alkali metals is lower than alkaline earth metalsD. Basic strength of alkali metal oxides increases down the group |
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Answer» Correct Answer - B,C,D |
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| 341. |
Alkali and Alkaline earth metals cannot be obtained by chemica reduction becaueseA. They are strong oxidising agentsB. They are strong reducing agentsC. Small sizeD. High density |
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Answer» Correct Answer - B |
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| 342. |
Which of the following changes is not realised in the laboratory?A. Absoption os NO by alkaline sodium sulphite to from a compoundB. Combustion of metallic Mg in `CO_(2)`C. Heating hydrated magnesium chloride to get the anhydrous saltD. |
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Answer» Correct Answer - 3 |
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| 343. |
Which of the following is a covalent compound ?A. `BeCl_(2)`B. `CaCl_(2)`C. `SrCl_(2)`D. `BaCl_(2)` |
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Answer» Correct Answer - 1 |
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| 344. |
Li resembles Mg in properties expectA. SizeB. HardnessC. Solubility of hydroxidesD. Flame colour |
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Answer» Correct Answer - D |
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| 345. |
Which of the following can dissolve limestone?A. `CO_(2)+H_(2)O`B. `NaOH+H_(2)O`C. `NH_(3)+H_(2)O`D. None of these |
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Answer» Correct Answer - 1 |
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| 346. |
`Na_(2)CO_(3^.)10H_(2)O` is an efflorescent salt. Under atmospheric conditions, the maximum numbe of wate molecules lost by it areA. 10B. 6C. 9D. 1 |
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Answer» Correct Answer - C |
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| 347. |
Assertion: Li and Mg shows similar chemical properties. Reason Li and MG belongs to `2^(nd)` period.A. If both Assertion & Reason are True & the Reason is a correct explanation of the AssertionB. If both Assertion & Reason are True but Reason is not a correct explanation of the AssertionC. If Assertion is True but the Reason is FalseD. If both Assertion & Reason are False |
| Answer» Correct Answer - C | |
| 348. |
Which of the following statements regarding the oxides of alkali and alkaline earth metals is correct?A. The oxides of alkaline earth metals are more basic than those of alkali metals.B. The reactivity of `K_(2)O` towards water is more than that of `Na_(2)O`.C. MgO is used as a refactory material for lining electric furnances.D. the milk of lime and lime water are two different solutions. |
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Answer» Correct Answer - BCD |
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| 349. |
Which of the following statement is correct for s-block elements:A. Be has smallest atomic size in IIA groupB. Li is most metallicC. Mg impart red colour to the flameD. Cs is most reducing in water |
| Answer» Correct Answer - A | |
| 350. |
Assertion: `Li_(2)SO_(4)` do not form double salt like alum. Reason: Atomic size of Li is too smallA. If both Assertion & Reason are True & the Reason is a correct explanation of the AssertionB. If both Assertion & Reason are True but Reason is not a correct explanation of the AssertionC. If Assertion is True but the Reason is FalseD. If both Assertion & Reason are False |
| Answer» Correct Answer - A | |