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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.
| 551. |
Which of the following has the highest reactivity towards water?A. `Na`B. `Rb`C. `Li`D. `K` |
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Answer» Correct Answer - B The reaction of alkali metals with water becomes increasingly violent on descending the group on account of their decreasing ionisation energies with increasing atomic size. So, the order of reactivity is : `Li lt Na lt K lt Rb`. |
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| 552. |
Which of the following has the highest reactivity towards water?A. NaB. RbC. LiD. K |
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Answer» Correct Answer - B |
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| 553. |
Which of the following statements is correct ?A. The solublilty of graoup 2 salt depends upon the lattice energy of the solid and the hydration energy of the ions.B. the solubiites of graoup 2 fluorides and hydroxides have oppsite trends.C. the solubilites of most graph 2 salts decrease with an increase in the atomc wight of the corresponding metalD. All are correct. |
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Answer» Correct Answer - 4 |
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| 554. |
Consider the following statements, `S_(1) :` Alkali metals are never found in free state in nature. `S_(2)` : The melting and boiling points of alkali metals are high. `S_(3)` : The ceasium and potassium both are used as electrodes in photoelectric cells. `S^(4)` :Alkali metals are normally kept in kerosene oil. and arrange in the order of true/flase.A. T F F FB. T T F FC. T F T TD. T T T F |
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Answer» Correct Answer - A |
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| 555. |
Consider the following statements, `S_(1) :` Alkali metals are never found in free state in nature. `S_(2)` : The melting and boiling points of alkali metals are high. `S_(3)` : The ceasium and potassium both are used as electrodes in photoelectric cells. `S^(4)` :Alkali metals are normally kept in kerosene oil. and arrange in the order of true/flase.A. T T F FB. T F T TC. F F F TD. T T F T |
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Answer» Correct Answer - B |
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| 556. |
Why are alkali metals not found in nature? |
| Answer» Alakali metals are highely reactive due to low ionisation enthalpy and strong electro-positive character. They do not occur in free or native state and are always comined with other elements. As a result, alkali mtelas are not generally found in nature. | |
| 557. |
`Ca(OH)_(2) + Cl_(2) to` |
| Answer» `Ca (OH)_(2) + CI_(2) to CaOCI_(2) + H_(2)O` | |
| 558. |
Which of the following statements is true about `Ca(OH)_(2)`?A. It is used in the preparation of bleaching powderB. It is a light blue solidC. It does not process disinfectant propertyD. It is used in the manufacture of cement |
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Answer» Correct Answer - A `Ca(OH)_(2)` is used in the preparation of bleaching powder. |
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| 559. |
Freshly prepared pure dilute solution of sodium in liquid ammonia:A. shows copper-bronze colourB. occupy large volume than that from the sum of the volume of Na and `NH_(3)` (l).C. reduces the `Geh_(4)`to `GeH_(2)^(-)`D. produces sodium amide and hydrogen gas with rusty iron wire. |
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Answer» Correct Answer - B::C::D |
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| 560. |
Which of the following is different from other chemically ?A. Quick limeB. Slaked limeC. Lime waterD. Mkilk of lime |
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Answer» Correct Answer - 1 |
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| 561. |
Select the incorrect statement ?A. `Na_(2)CO_(3^.)NaHCO_(3^.)2H_(2)O` is the mineral called tronaB. Both`Li_(2)CO_(3)` and `MgCO_(3)` are thermally stableC. `K_(2)CO_(3)` cannot be made by ammoin-soda processD. `Li_(2)CO_(3)` is only sparingly solubly in water and no solid `LiHCO_(3)` has been isolated. |
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Answer» Correct Answer - B |
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| 562. |
All the products are same when x or y reacts with water,x and y aer respectivelyA. Co,CaOB. Na,NaHC. NaOH,`Na_(2)CO_(3)`D. Na,K |
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Answer» Correct Answer - B |
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| 563. |
One mole of magnesium nitride on reaction with an excess of water givesA. Two mole of nitric acidB. One mole of nitric acidC. Two mole of ammniaD. One mole of ammonia |
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Answer» Correct Answer - 3 |
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| 564. |
Choose the correct statement(s) :A. Large reducing nature of Be is due to large hydration energy and large value of enthalpy of atomizationB. Alkaline earth metals dissolve in liquid ammonia to give deep blue-black solutions forming ammoniated ionsC. From the solutions of (b), ammoniates `[M(NH_(3))_(6)]^(2+)` can be recoveredD. all of the above |
| Answer» Correct Answer - D | |
| 565. |
`Na_(2)SO_(4)` is water soluble but `BaSO_(4)` is insoluble because :A. the hydration energy of `Na_(2)SO_(4)` is higher than that of its lattice energyB. the hydration energy of `Na_(2)SO_(4)` is less than that of its lattice energyC. the hydration energy `BaSO_(4)` is less than that of its lattice energyD. the hydration energy of `BaSO_(4)` is higher than that of its lattice energy |
| Answer» Correct Answer - A::C | |
| 566. |
The covalent metal oxide among the following isA. MgOB. BaOC. CaOD. BeO |
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Answer» Correct Answer - 4 |
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| 567. |
Mengesium is related diobonally toA. BeB. CaC. LiD. Si |
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Answer» Correct Answer - 3 |
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| 568. |
The formula of anhydrite isA. `CaSO_(4^.)2H_(2)O`B. `CaSO_(4^.)H_(2)O`C. `CaSO_(4)`D. `Mg(ClO_(4))_(2)` |
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Answer» Correct Answer - 3 |
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| 569. |
Which of the following statements are correct?A. Mg is present in chlorophyllB. Alkaline earth metals does not form super oxideC. `NaHCO_(3)` is known as baking sodaD. Permanent hardness of water is removed by boiling |
| Answer» Correct Answer - A::B::C | |
| 570. |
The substance not likely to contain `CaCO_(3)` is:A. sea shellsB. dolomiteC. a marble statueD. Calcined gypsum |
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Answer» Correct Answer - D Calcined gypsum is `CaSO_(4)` and not `CaCO_(3)`. |
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| 571. |
Which of the following gives propyne on hydrolysis ?A. `Al_(4)C_(3)`B. `Mg_(2)C_(3)`C. `B_(4)C`D. `La_(4)C_(3)` |
| Answer» Correct Answer - 2 | |
| 572. |
Which one of the following statement(s) is/are incorrect ?A. `KHCO_(3)` is less soluble than `NaHCO_(3)` and is thus prepared easily by following reaction `NH_(4)HCO_(3) + KCl rarr NH_(4) Cl + KHCO_(3)`B. `Li_(2)SO_(4)` forms double salts(alums) with `Al_(2)(SO_(4))_(3)`.C. Polarising power of `Li^(+)` ion is nearly the same as that of `Mg^(2+)` ion .D. Zinc displaces `H_(2)` on reaction with aq NaOH as well as with dilute HCl. |
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Answer» Correct Answer - A::B |
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| 573. |
Which of the following is the correct statement ?A. `Ba(OH)_(2)gtCa(OH)_(2)gt Mg(OH)_(2)gtBe(OH)_(2)["htermal stabiltiy"]`B. `BaSO_(4)gt SrSO_(4)gtCaSO_(4)gtMgSO_(4)["Solubitlity inwater "]`C. `CaF_(2)gt Mg F_(2)gt BaF_(2)gt BeF_(2)["Solubility in water "]`D. `BaCO_(3)lt SrCO_(3)lt CaCO_(3)ltMgCO_(3)["thermal stabilty"]` |
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Answer» Correct Answer - A |
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| 574. |
Select the incorrect order .A. `LiHgtNaHgtKHgtRbH ("thermalstability")`B. `CdCO_(3)gt CaCO_(3)gtCaCO_(3)("Covalent character")`C. `BeCO_(3)gt MgCO_(3)gt CaCO_(3)("Ease of oxide formatioon on heating at some temperature" )`D. `Be F_(2)lt MgF_(2)lt CaF_(2)("Solubilty in water")` |
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Answer» Correct Answer - D |
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| 575. |
Na metal can be kept underA. AlcoholB. KeroseneC. BenzeneD. Toluene |
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Answer» Correct Answer - B::C::D |
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| 576. |
Select the correct statement/s :A. The stability of peroxides and super oxides of alkali metals increases with increases in size of the metal ion due to stabilization of larger anions by larger cations through lattice energy effects .B. LiF is less solute due to high lattice energy and CsI is less soluble due to smaller hydration energy .C. NaOH decomposes easily to give `Na_(2)O` and `H_(2)O`.D. `Na_(2)CO_(3)` is thermally more stable than `Li_(2)CO_(3)`. |
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Answer» Correct Answer - A::B::D |
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| 577. |
Alkaline earth metal nitrates on heating decompose to give `:`A. `M(NO_(2))_(2)and O_(2)`B. `MO,NO_(2)only`C. `MO,N_(2)andO_(2)`D. `MO,No_(2)and O_(2)` |
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Answer» Correct Answer - D |
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| 578. |
The carbonate that will not decompose on heating isA. `Na_(2) CO_(3)`B. `CaCO_(3)`C. `BaCO_(3)`D. `Li_(2)CO_(3)` |
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Answer» Correct Answer - D All alkali metal carbonates (except `Li_(2)CO_(3)`) are highly stable to heat as compared to other metal carbonates. |
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| 579. |
Which of the following carbonate will not decompose on heating:-A. `BaCO_(3)`B. `ZnCO_(3)`C. `Na_(2)CO_(3)`D. `Li_(2)CO_(3)` |
| Answer» Correct Answer - C | |
| 580. |
Which of the following Is more basic?A. `Be (OH)_(2)`B. `Ca(OH)_(2)`C. `Ba(OH)_(2)`D. `Mg(OH)_(2)` |
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Answer» Correct Answer - 3 |
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| 581. |
Thermal stability of alkaline earth metal carbonates decreases in the orderA. `BaCO_(3) gt SrCO_(3) gt CaCO_(3) gt MgCO_(3)`B. `BaCO_(3) gt SrCO_(3) gt MgCO_(3) gt CaCO_(3)`C. ` CaCO_(3) gt SrCO_(3) gt MgCO_(3) gt BaCO_(3)`D. ` MgCO_(3) gt CaCO_(3) gt SrCO_(3) gt BaCO_(3)` |
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Answer» Correct Answer - 1 |
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| 582. |
The decomposition temperature is maximum for:-A. `BeCO_(3)`B. `CaCO_(3)`C. `K_(2)CO_(3)`D. `Li_(2)CO_(3)` |
| Answer» Correct Answer - C | |
| 583. |
The sesqui carbide of the following isA. `CaC_(2)`B. `Mg_(2)C_(3)`C. `Al_(4)C_(3)`D. `Be_(2)C` |
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Answer» Correct Answer - 2 |
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| 584. |
Which of the following iw highly water soluble?A. `Mg(OH)_(2)`B. `Ca(OH)_(2)`C. `Ba(OH)_(2)`D. `Mg(OH)_(2)` |
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Answer» Correct Answer - 3 |
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| 585. |
Which one of the following statement is true about `Ca(OH)_(2)` ?A. It is not used in the praparation of bleaching powderB. It is a light blue solidC. It is used in chromatographyD. Its solution in water is called lime water |
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Answer» Correct Answer - 4 |
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| 586. |
Metallic magnesium is prepared by-A. Reduction of `MgO` by cokeB. Electrolysis of aqueous solution of `Mg(NO_(3))_(2)`C. Displacement of Mg by iron from `MgSO_(4)` solutionD. Electrolysis of molten `MgCI_(2)` |
| Answer» Correct Answer - D | |
| 587. |
Salt like carbide isA. `CaC_(2)`B. `Mg_(2)C_(3)`C. `Al_(4)C_(3)`D. All |
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Answer» Correct Answer - 4 |
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| 588. |
Alkali metals dissolve in liquid `NH_(3)` then which of the following observations is not true:A. It becomes paramagneticB. Solution turns into blue due to solvated electronsC. It becomes diamagneticD. Solution becomes conducting |
| Answer» Correct Answer - C | |
| 589. |
Which of the carbide will give methane when reacts with water-A. `BeC_(2)`B. `CaC_(2)`C. `Be_(2)C`D. `Mg_(2)C_(3)` |
| Answer» Correct Answer - C | |
| 590. |
Statement-1: Calcium carbide on hydrolysis gives methane. Statement-2: Calcium carbide contains `C_(2)^(2-)` anion.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-1.C. Statement-1 is True, Statement-2 is False.D. Statement-1 is False, Statement-2 is True. |
| Answer» Correct Answer - D | |
| 591. |
The correct order of mobility of alkali metal ions in aqueous solution isA. `Rb^(+) gt K^(+) gt Na^(+) gt Li^(+)`B. `Li^(+) gt Na^(+) gt K^(+) gt Rb^(+)`C. `Na^(+) gt K^(+) gt Rb^(+) gt Li^(+)`D. `K^(+) gt Rb^(+) gt Na^(+) gt Li^(+)` |
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Answer» Correct Answer - A Is the correct answer |
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| 592. |
`Li` shows the diagonal relationship withA. `Mg`B. `B`C. `Al`D. `C` |
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Answer» Correct Answer - A Diagonal relationship `:` elements of `2nd ` period often show resemblance to the element of the third period diagonally placed to it. This type of behaviour is called diagonal relationship `Li` shows the diagonal relationship with `Mg`. |
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| 593. |
The species formed in concentrated aqueous solution of `Na_(2)O_(2)` isA. `H_(2)O_(2)`B. `O_(2)`C. NaOHD. Both 2 & 3 |
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Answer» Correct Answer - D |
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| 594. |
To mercirise cotton the regent used isA. `Na_(2)CO_(3)`B. `NaHCO_(3)`C. `NaOH`D. `Ca(OH)_(2)` |
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Answer» Correct Answer - C |
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| 595. |
lithium has highest ionisation energy but is strongest reducing agent in solution because of itsA. Greater sublimation energyB. Greater heat of atomisationC. Covalent natureD. Greater heat of hydration |
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Answer» Correct Answer - D |
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| 596. |
Industrially KOH is used instead of NaOH to absorb acidic oxides becauseA. Potassium salts are more soluble than sodium saltB. Potassium salts are more stable than sodium saltsC. Potassium slats are less soluble than sodium saltsD. Potassium salts are easily formed than sodium salts |
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Answer» Correct Answer - A |
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| 597. |
Heat is liberated when sodium hydroxide dissolve in water. This is due toA. HydrolysisB. HydrationC. IonisationD. Dissociation |
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Answer» Correct Answer - B |
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| 598. |
The standard oxidation potential value of Li is greater than that of K. But K is more reactive towardds water than Li, becauseA. The melting point of K is less than Li and the heat of reaction is sufficient to make it melt. So the molten metal spreads out, and expose a large surface to the water.B. The melting point of Li is less than K and the heat of reaction is sufficient to make it melt. So the molten metal spreads out, and expose a larger surface to the water.C. The boiling point of K is more than Li and the heat of reaction is sufficient to make it melt. So the molten metal spreads out, and expose a larger surface to the water.D. All the above are correct |
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Answer» Correct Answer - A |
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| 599. |
Which of the following cannot be prepared by the reaction between iodine and sodium hydroxide?A. NaIB. NaOIC. `NaIO_(3)`D. `NaIO_(4)` |
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Answer» Correct Answer - D |
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| 600. |
The difference in the oxdiation numbers of the products formed when chlorine reacts with hot concentrated sodium hydroxide isA. 2B. 3C. 4D. 6 |
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Answer» Correct Answer - D |
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