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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.
| 751. |
In the lithosphere, rarest occuring alkaline earth metal isA. BeB. RaC. SrD. Ba |
| Answer» Correct Answer - B | |
| 752. |
Which one of the following order represents the correct sequence of the increasing basic nature of the given oxides ?A. `MgO lt K_(2)O lt Al_(2) O_(3) lt Na_(2)O`B. `Na_(2)O lt K_(2)O lt MgO lt Al_(2)O_(3)`C. `K_(2)O lt Na_(2)O lt Al_(2)O_(3) lt MgO`D. `Al_(2)O_(3) lt MgO lt Na_(2)O lt K_(2)O` |
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Answer» Correct Answer - A Metallic character decreases across a period in the sequence as Na , Mg , Al and increases down the group in the sequence as Na , K . As metallic character of the element attached to oxygen atom increases, the basic character of oxides increases . Hence , the increasing correct order of basic nature is `Al_(2)O_(3) lt MgO lt Na_(2)O lt K_(2)O`. |
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| 753. |
Which of the following is covalent ?A. NaClB. KClC. `BeCl_(2)`D. `HgCl_(2)` |
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Answer» Correct Answer - C Among `Na^(+) , K^(+) , Be^(2+)` and `Mg^(2+) , Be^(2+)` has the smallest size and is also most electronegative . Therefore , `BeCl_(2)` is covalent . |
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| 754. |
Match the flame colours of the alkaline earth metal salts in the Bunsen burner . `{:((p), "Calcium" ,1., "Brick red") , ((q) , "Strontium" , 2., "Apple"), ((r), "Barium" , 3., "Crimson"):}`A. p-1 , q - 3 , r-2B. p-3 , q - 1 , r-2C. p-2 , q -3 , r - 1D. p-1 , q-2 , r-3 |
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Answer» Correct Answer - A Calcium (p) - Brick red (1) , Strontium (q) - Crimson (3) , Barium (r) - Apple green (2) . Thus option (a) is correct . |
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| 755. |
Which of the following is a covalent solid ? `i) AlF_(3) ii)AlCl_(3) iii)MgCl_(2)iv)BeCl_(2)`A. I,iiB. ii,iiiC. iii,ivD. ii,iv |
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Answer» Correct Answer - 4 |
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| 756. |
The atomic numbers corresponding to alkaline earth metal?A. 10B. 20C. 30D. 40 |
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Answer» Correct Answer - 2 |
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| 757. |
What happens when magnesium is burnt in air and the products X and Y are treated with water ? A. `{:(X, Y , P , Q) , (Mg O , Mg"(OH)"_(2) , Mg"(OH)"_(2) , N_(2)):}`B. `{:(X, Y , P , Q) , (Mg O , Mg_(3)N_(2) , Mg"(OH)"_(2) , NH_(3)):}`C. `{:(X, Y , P , Q) , (Mg O , Mg_(3)N_(2) , Mg"(OH)"_(2) , N_(2)):}`D. `{:(X, Y , P , Q) , (Mg O , MgCO_(3) , Mg"(OH)"_(2) , CO_(2)):}` |
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Answer» Correct Answer - B Magnesium reacts with air to form oxide and nitride. On reaction with water the oxide gives hydroxide and nitride gives hydroxide and ammonia. `2Mg + O_(2) to underset((X)) (2MgO)` `3Mg +N_(2) to underset((Y)) (mg_(3)N_(2))` ` MgO+ H_(2)O to underset((P))(Mg(OH)_(2))` `Mg_(3) N_(2)+ H_(2)O to underset((P))(3Mg (OH)_(2))+ underset((Q))2NH_(3))` |
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| 758. |
`CaC_(2) + H_(2)O to` |
| Answer» `CaC_(2) + 2H_(2)O to Ca(OH)_(2) + underset("Acetylene")(CH -= CH)` | |
| 759. |
When `BeCl_(2)` is hydrolyzed, fumes evolve and fumes are intensified when glass rod moist with ammonia is placed near the mouth of test tube. Explain this process of hydrolysis.A. `Cl_(2)`B. `HCl`C. `NH_(4) OH`D. `NH_(4)Cl` |
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Answer» Correct Answer - B `BeCl_(2) + 2H_(2)O to Be(OH)_(2)_ underset("fumes") (2HCl)` `HCl+ NH_(3) to underset(("intense fumes "))(NH_(4)Cl)` |
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| 760. |
Which of the following fumes in moisture in air ?A. `BeCl_(2)`B. `CaCl_(2)`C. `SrCl_(2)`D. `BaCl_(2)` |
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Answer» Correct Answer - 1 |
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| 761. |
`BeCl_(2)+LiAlH_(4)rarrX+LiCl+AlCl_(3)`A. `X is LiH`B. `X is BeH_(2)`C. `X is BeCl_(2).2H_(2)O`D. None of these |
| Answer» Correct Answer - B | |
| 762. |
Anhydrone, a drying agent isA. `Mg(CiO_(4))_(2)`B. `Sr(ClO_(4))_(2)`C. `Ca(ClO_(4))_(2)`D. `Ba(ClO_(4))_(2)` |
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Answer» Correct Answer - a Magnesium perchlorate, `Mg(ClO_(4))_(2)` is also called anhydrone. |
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| 763. |
`Mg + NO to` |
| Answer» `5Mg + 2NO overset("Heat")(to) 2MgO + underset("Magnesium nitride")(Mg_(3)N_(2))` | |
| 764. |
The molecular formula of gypsum isA. `CaSO_(4^.)H_(2)O`B. `CaSO_(4^.)2H_(2)O`C. `2CaSO_(4^.)2H_(2)O`D. `CaSO_(4^.)3H_(2)O` |
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Answer» Correct Answer - 2 |
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| 765. |
`Mg + SO_(2) to` |
| Answer» `2Mg + SO_(2) overset("Heat")(to) 2MgO + S` | |
| 766. |
`(CaSO_(4))_(2)H_(2)O` isA. GypsumB. AnhydriteC. AlabasterD. Plaster of paris |
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Answer» Correct Answer - 4 |
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| 767. |
`MgO + C + Cl_(2) overset("Heat")(to)` |
| Answer» `MgO + C + Cl_(2) overset("Heat")(to) MgCl_(2) + CO` | |
| 768. |
Alkaline earth metals show:-A. DivalencyB. MonovalencyC. Variable valencyD. Zero valency |
| Answer» Correct Answer - A | |
| 769. |
Which statement will be true for solution, when Ba is dissolved in ammonia:-A. Solution becomes blueB. Solution becomes good conductorC. Solution remains colourlessD. Both (1) and (2) are correct |
| Answer» Correct Answer - D | |
| 770. |
The decreasing order of the second ionisation potential of K , Ca and Ba is (At. No : K = 19 , Ca = 20 , Ba = 56)A. `K gt Ca gt Ba`B. `Ca gt Ba gt K`C. `Bagt K gt Ca`D. `K gt Ba gt Ca` |
| Answer» Correct Answer - A | |
| 771. |
What is the decreasing order of standard oxidation potential of K,Ca and LI:-A. `Ca, Li,K`B. `Li, Ca,K`C. `Li,K,Ca`D. `K, Ca, Li` |
| Answer» Correct Answer - C | |
| 772. |
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 solid .C. It does not possess disinfectant property.D. It is used in the manufacture of cement . |
| Answer» Correct Answer - A | |
| 773. |
Assertion . Bleaching powder is a mixed salt . Reason . In the presence of `CoCl_(2)` , bleaching powder decompose to give `CaCl_(2)` and `O_(2)` .A. If both assertion and reason are true, and reason is the true explanation of the assertion.B. If both assertion and reason are true, but reason is not the true explanation of the assertion.C. If assertion is true, but reason is falseD. If both assertion and reason are false. |
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Answer» Correct Answer - b Correct explanation . Bleaching powder is a mixed salt of `Ca(O Cl)_(2) , CaCl_(2)` and `Ca(OH)_(2) , CaCl_(2)` decomposes `Ca(O Cl)_(2)` to form `CaCl_(2)` and `O_(2)`. |
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| 774. |
Which of the following alkali metal carbonate is the least stable and decomposes readilyA. `Li_(2)CO_(3)`B. `Na_(2)CO_(3)`C. `K_(2)CO_(3)`D. `Cs_(2)CO_(3)` |
| Answer» Correct Answer - A | |
| 775. |
Which does not form double salt-A. `Li_(2)SO_(4)`B. `Na_(2)SO_(4)`C. `K_(2)SO_(4)`D. `Rb_(2)SO_(4)` |
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Answer» Correct Answer - A `Li_(2)SO_(4)` (due to small size) |
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| 776. |
Dissolving metallic zinc in `NaOH` producesA. `Zn(OH)_(2)`B. `Na_(2)ZnO_(2)`C. `ZnO`D. `Zn(OH)_(2)+Na_(2)ZnO_(2)` |
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Answer» Correct Answer - B Zn-Amphoteric metal. `Zn + 2HCI rarr ZnCI_(2)+ H_(2) uarr NaOH + Zn rarr Na_(2)ZnO_(2)` sodium zincate |
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| 777. |
The excess of `NaOH` reacts with zinc to form-A. `Zn(OH)_(2)`B. `ZnH_(2)`C. `ZnO`D. `Na_(2)ZnO_(2)` |
| Answer» Correct Answer - D | |
| 778. |
Which of the following salts do not from any frecipitated with excess of NaOH?A. `ZnCl_(2)`B. `FeCl_(3)`C. `NiCl_(2)`D. `CuSO_(4)` |
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Answer» Correct Answer - A |
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| 779. |
The calcium salt used as manure isA. `CACO_(3)`B. `MgCO_(3)`C. `CaC_(2)`D. `CaSO_(4)` |
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Answer» Correct Answer - 4 |
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| 780. |
Identify the incorrect statement(s)?A. Mg is lighter than CaB. The atomic radius of Mg is greater than that of Ca.C. Mg is used as a reducing agentD. Mg alloys are used in the construction of air crafts. |
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Answer» Correct Answer - AB |
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| 781. |
Which oxide is more basic among the followingA. BeOB. MgOC. CaOD. BaO |
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Answer» Correct Answer - 4 |
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| 782. |
The most basic oxide among the following isA. `Na_(2)O`B. BaOC. `As_(2)O_(3)`D. `Al_(2)O_(3)` |
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Answer» Correct Answer - A |
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| 783. |
Which one of the following represent a correct sequence of reducing power of the following elements (in aq solution) ?A. `Li gt Cs gt Rb `B. `Rb gt Cs gt Li `C. `Cs gt Li gt Rb `D. `Li gt Rb gt Cs ` |
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Answer» Correct Answer - A |
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| 784. |
`underset((" metal chloride"))M overset (Na_(2)HPLO_(4)) underset(NH_(4)Cl"ammonia solution")rarrB`(white paper) `B overset(Delta)rarrC+D+E` (D- pungent smelling gas turns red litmus blue) B is :A. `Ca(NH_(4))PO_(4).6H_(2)O`B. `Mg(NH_(4)) PO_(4).6H_(2)O`C. `Ca(NH_(4))PO_(4)`D. `Ca_(3)(PO_(4))_(2)` |
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Answer» Correct Answer - B |
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| 785. |
Which one of the following statement (s) is /are correct?A. Beryllium easily forms hydrated peroxide `BeO_(2).8H_(2)O`.B. Calcium and barium bicarbonates are stable only in solution and decompose on removal of water to give carbonates.C. Group 2 metals have higher melting points when compared to the group 1 metalsD. Solubility of sulphates of alkaline earth metals increases going down the group. |
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Answer» Correct Answer - BC |
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| 786. |
The correct order of polarising ability of cations al Alkaline earth metals isA. `Be^(2+) gt Ca^(2+) gt Mg^(2+) gt Ba^(2+)`B. `Be^(2+) lt Mg^(2+) gt Ca^(2+) = Ba^(2+)`C. `Be^(2+) lt Mg^(2+) gt Ca^(2+) lt Ba^(2+)`D. `Be^(2+) lt Ca^(2+) lt Mg^(2+) lt Ba^(2+)` |
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Answer» Correct Answer - 4 |
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| 787. |
Which of the following statements is /are correct?A. Glauber salt on heating only looses water of crystallisationB. Epsom salt on heating at `200^(@)C` only looses water of crystallisation.C. Gypsum on heating at `400^(@)C` decomposed to CaO and `SO_(3)`.D. Washing soda on heating looses water and becomes anhydrous |
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Answer» Correct Answer - ABCD |
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| 788. |
Which of the following statement is/are correct?A. `BeCl_(2)` fumes in moist air and liberates `Cl_(2)` gas.B. `MgO` used as refractory material.C. `BaSO_(4)` is extremely soluble and passes from digestive system into the circulatory system.D. Alkaline earth metal salts are diamagnetic in nature. |
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Answer» Correct Answer - BD |
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| 789. |
Among the following amphoteric oxide isA. BeOB. `Al_(2)O_(3)`C. ZnOD. All of above |
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Answer» Correct Answer - 4 |
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| 790. |
Lithium does not from stable peroxide becauseA. Of its small sizeB. Covalent nature of peroxideC. d-orbitals are absent in itD. It is highly reactive and from superoxide in place of peroxide |
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Answer» Correct Answer - A |
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| 791. |
The alkali metal that reacts with nitrogen directly to form nitride isA. `Li`B. `Na`C. `K`D. `Rb` |
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Answer» Correct Answer - A `6Li +N_(2) rarr 2 Li_(3) N` ( Lithium nitride ) |
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| 792. |
Which of the following is an amphoteric oxide-A. `CaO`B. `SrO`C. `BeO`D. `MgO` |
| Answer» Correct Answer - C | |
| 793. |
The following are some statement related to IIA group mettals I0 The raction with water increased from Be to Ba II) The ionic natuare of hydrides decreases from Be to Ba .III)The thermal stability of the peroxides increaswes with increase in cationnic Size ,IV) the solubility of halides increases from Mg to BaA. I& IIIB. II& IVC. I,II& IIID. I,III&IV] |
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Answer» Correct Answer - 3 |
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| 794. |
Which of the following alkali metals has the biggest tendency of the half reaction `-M_((g))rarr M_((aq))^(+) + e^(-)`A. SodiumB. LithiumC. PotassiumD. Cesium |
| Answer» Correct Answer - B | |
| 795. |
The strongest reducing agent is-A. `Be`B. `Mg`C. `Sr`D. `Ba` |
| Answer» Correct Answer - D | |
| 796. |
NaOCI is used as a bleaching agent and sterllising agent. It can be synthesised by the action ofA. NaCl with `H_(2)O`B. `NH_(4)Cl` with NaOHC. `Cl_(2)` with cold and dilute NaOHD. `Cl_(2)` with hot and concentrated NaOH |
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Answer» Correct Answer - C |
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| 797. |
The decreasing order of the second ionization potentials of `K, Ca` and `Ba` isA. `K gt Ca gt Ba`B. `Ca gt Ba gt K`C. `Ba gt K gt Ca`D. `K gt Ba gt Ca` |
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Answer» Correct Answer - A `K^(+) gt Ca^(+) gt Ba^(+)` (IE decrases down the group ) |
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| 798. |
The decreasing order of the second ionization potentials of `K, Ca` and `Ba` isA. KgtCagtBaB. CagtBagtKC. BagtKgtCaD. KgtBagtCa |
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Answer» Correct Answer - 1 |
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| 799. |
Which of the following element have maximum tendency to form complex compound-A. `Be`B. `Ba`C. `Ca`D. `Mg` |
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Answer» Correct Answer - A Complex formation tendency `prop phi` |
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| 800. |
Complex forming tendency is more for-A. `Na^(+)`B. `K^(+)`C. `Rb^(+)`D. `Li^(+)` |
| Answer» Correct Answer - D | |