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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.
| 351. |
One element which is used in flash light in photography, when heated with alkyl halide, gives an organometallic compound. The element is:-A. CalciumB. TungstonC. MangeneseD. Magnesium |
| Answer» Correct Answer - D | |
| 352. |
Which of the following solids is polymeric ?A. `BeCl_(2)("vapour")`B. `BeCL_(2)("solid")`C. `BeF_(2)`D. Be |
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Answer» Correct Answer - 2 |
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| 353. |
Which of the following does not exist?A. `KI + I_(2) to KI_(3)`B. `KF + F_(2) to KF_(3)`C. `KBr + ICl to K [BrICl]`D. `KF + BrF_(3) to K [BrF]` |
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Answer» Correct Answer - B |
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| 354. |
When `Na2CO_(3)` is added to an aqueous solution of `CuSO_(4)`A. `CuSO_(3)` is precipitatedB. Copper hydroxide is precipitatedC. Basci copper carbonate is precipitatedD. `Na_(2)CO_(3)` is less soluble in water than `NaHCO_(3).` |
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Answer» Correct Answer - B |
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| 355. |
Which is the corret order of solubility in water?A. `CsF gt CsCl gt CsBr gt CsI`B. `LiF gt LiCl gt LiBr gt LiI`C. `RbClO_(4) gt KClO_(4) gt NaClO_(4) gt LiClO_(4)`D. `LiF gt NaF gt KF gt RbF` |
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Answer» Correct Answer - A |
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| 356. |
Choose the correct statements from the following :A. Beryllium is not readily attacked by acids because of the presence of an oixde film on the surface of the metalB. Beryllium sulphate is readily soluble in water as the greater hydration enthalpy of `Be^(2+)` overcomes the lattice enthalpy factor.C. Beryllium exhibits coordination number more than four.D. Beryllium oixde is purely acidic in nature |
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Answer» Correct Answer - A::B (a) and (b) are both correct |
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| 357. |
Identify the correct formula of halides of alkaline earth metals from the following.A. `BaCl_(2).2H_(2)O`B. `BaCl_(2).4H_(2)O`C. `CaCl_(2).6H_(2)O`D. `SrCl_(2).4H_(2)O` |
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Answer» Correct Answer - A::C (a) and (c ) are both correct chemical formulae. |
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| 358. |
Identify the correct formula for halides of alkaline earth metals.A. `BaCl_(2).6H_(2)O`B. `CaCl_(2).6H_(2)O`C. `BaCl_(2).4H_(2)O`D. `SrCl_(2).4H_(2)O` |
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Answer» Correct Answer - b The correct formula of halides of alkaline earth metals is `CaCl_(2).6H_(2)O.BaCl_(2).2H_(2)O.SrCl_(2).6H_(2)O`. |
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| 359. |
Identify the correct formula for halides of alkaline earth metals.A. `BaCl_(2). 6H_(2)O`B. `CaCl_(2). 6H_(2)O`C. `BaCl_(2). 4H_(2)O`D. `SrCl_(2). 4H_(2)O` |
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Answer» Correct Answer - B The correct formula of halides of alkaline earth metals is `CaCl_(2) *6H_(2)O, BaCl_(2)* 2H_(2)O , Sr Cl_(2) * 6H_(2)O` |
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| 360. |
In aqueous solution the most stable sulphate isA. `BeSO_(4)`B. `MgSO_(4)`C. `CaSO_(4)`D. `BaSO_(4)` |
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Answer» Correct Answer - D Solubility of sulphates decreases down the group, therefore `BaSO_(4)` is least soluble sulphate while `BeSO_(4)` is highly soluble sulphate . Hence , `BaSO_(4)` will be most stable while `BeSO_(4)` is least stable in aqueous solution. |
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| 361. |
Which one of the following fluoride of alkali metals has the highest lattice energy?A. LiFB. CsFC. NaFD. KF |
| Answer» Correct Answer - A | |
| 362. |
In which of the following is the hydration energy higher than the lattice energy?A. `BaSO_(4)`B. `MgSO_(4)`C. `RaSO_(4)`D. `SrSO_(4)` |
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Answer» Correct Answer - B Hydration energy of alkalinie earth metals sulphates decreases down the group. `Mg^(2+)` being smaller than the other ions , is readily hydrated. Thus, `MgSO_(4)` has higher hydration energy than lattice energy. |
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| 363. |
Lattice energy (numerical value) of chloride of alkali metals is in order ofA. LiCl `gt ` NaCl `gt ` KCl` gt ` RbCl `gt` CsClB. LiCl `lt `NaCl `lt ` KCl `lt` RbCl `lt` CsClC. `NaCl lt KCl lt LiCl lt RbCl lt CsCl`D. `NaCl lt KC lt RbCl lt CsCl lt Li Cl` |
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Answer» Correct Answer - A The correct order for lattice enregy of chloride of alkali metals `LiCl gt NaCl gt KCl gt RbCl gt CsCl` Smaller cation polarises anion to a greater extent hence, larger covalent nature and thus higher lattice energy. |
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| 364. |
The compound with high lattice energy isA. NaClB. LiFC. CsID. KF |
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Answer» Correct Answer - B |
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| 365. |
Which of the following has maximum thermal stability?A. `Li_(2)CO_(3)`B. `Na_(2)CO_(3)`C. `K_(2)C)_(3)`D. `Rb_(2)CO_(3)` |
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Answer» Correct Answer - D |
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| 366. |
Correct statement about the alkali metals include that (i) The first ionization energy decreases down the group (ii) An unpaired electron is present in an s-orbital (iii) Chemical reactivity increases with increasing atomic number (iv) Their ions have the electronic configuration of Noble gases. The correct statements areA. ii,iiiB. All are correctC. ii,ivD. I,ii |
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Answer» Correct Answer - C |
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| 367. |
Which of the following has an unpaired electron in itA. `K_(2)O`B. `K_(2)O_(2)`C. `KO_(2)`D. `Na_(2)O` |
| Answer» Correct Answer - C | |
| 368. |
A mixture of `Be(OH)_(2)` and `Fe(OH)_(3)` can be separtated easily by treating it withA. HClB. `NH_(4)OH`C. `HNO_(3)`D. NaHO |
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Answer» Correct Answer - 4 |
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| 369. |
Which of the following forms metal oxide on heatingA. `Na_(2)CO_(3)`B. `Li_(2)CO_(3)`C. `K_(2)SO_(4)`D. `NaHCO_(3)` |
| Answer» Correct Answer - B | |
| 370. |
Which of the following releases 0.2 moles of hydrogen on hydrolysis-A. `0.1` mole of `LiH`B. `0.2` mole of `LiH`C. `0.3` mole of `LiH`D. `0.4` mole of `LiH` |
| Answer» Correct Answer - B | |
| 371. |
How many moles of ammonia are produced, on hydrolysis of five moles of `Li_(3)N` ?A. 3B. 5C. 7D. 9 |
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Answer» Correct Answer - B |
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| 372. |
A compound which on hydrolysis releases ammonia is-A. `Li_(3)N`B. `LiNO_(3)`C. `NaNO_(3)`D. None of these |
| Answer» Correct Answer - A | |
| 373. |
The metal ion which does not give any flame colouration is-A. `Li^(+)`B. `Be^(+2)`C. `Na^(+)`D. `K^(+)` |
| Answer» Correct Answer - B | |
| 374. |
`NaHCO_(3)` can be used to-A. Decrease acidity of stomachB. Prepare `CO_(2)` used as fire extinguisherC. Prepare breadD. All of these |
| Answer» Correct Answer - D | |
| 375. |
Existence of which hydrated salt is most likely?A. `LiCl.2H_(2)O`B. `NaCl.2H_(2)O`C. `KCl.2H_(2)O`D. `CsCl.2H_(2)O` |
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Answer» Correct Answer - A `Li^(+)` has maximum degree of hydration. |
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| 376. |
Which of the following exists as hydrated salt-A. `NaCI`B. `LiCI`C. `RbCI`D. `KCI` |
| Answer» Correct Answer - B | |
| 377. |
Which does not exists in solid stateA. `LiHCO_(3)`B. `CaCO_(3)`C. `NaHCO_(3)`D. `Na_(2)CO_(3)` |
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Answer» Correct Answer - A `LiHCO_(3)` |
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| 378. |
Which cannot be used to generate `H_(2)`?A. `AI + NaOH`B. `Zn + NaOH`C. `Mg+NaOH`D. `LiH + H_(2)O` |
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Answer» Correct Answer - C `Zn + NaOH`. Amphoteric elements `(Be, Zn, AI, Sn, Pb` etc) Produces hydrogen with `NaOH`. |
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| 379. |
Alum is the name used for all double salts having the composition `M_(2)^(-) SO_(4).M_(2)^(III)(SO_(4))_(3).24H_(2)O`. Where `M^(III)` stands for `AI^(+3), Cr^(+3), Fe^(+3)`, while `M^(I)` stands forA. `Li^(+), Cu^(+), Ag^(+)`B. `Li^(+), NH_(4)^(+), Na^(+)`C. `Na^(+), K^(+), Rb^(+)`D. `Ca^(+2), Mg^(+2), Sr^(+2)` |
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Answer» Correct Answer - C `M^(-)`-Monovalent cation except `Li^(+)` due to small size. |
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| 380. |
Which of the following metals is present chlorophyll?A. MgB. ZnC. CaD. Co |
| Answer» Correct Answer - A | |
| 381. |
select correct statement (s)A. `CaCO_(3)` is more soluble in a dolution of `CO_(2)` than in` H_(2)O`B. `Na_(2)CO_(3)` is converted into `Na_(2)O and COP_(2)` on heating .C. `Li_(2)CO_(3)` is thermally most stable .D. Presence of `CaCl_(2)or CaSO_(4)` in water causues temporary harness, |
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Answer» Correct Answer - A |
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| 382. |
Y is a gas which disproporionates on passing through hot and concentrated solution of X.Z is a gas which can also be obtained by the action of solution of X on zinc The gas Z canbe obtained by the action of concentrated solution of X on:A. `P_(4)`B. SiC. SD. `F_(2)` |
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Answer» Correct Answer - B |
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| 383. |
Y is a gas which disproporionates on passing through hot and concentrated solution of X.Z is a gas which can also be obtained by the action of solution of X on zinc In the reaction of Y with hot and concentrated solution of X , the equivalent weight of Y is `"__"` (Molecular weight of Y is M) |
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Answer» Correct Answer - C |
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| 384. |
Y is a gas which disproporionates on passing through hot and concentrated solution of X.Z is a gas which can also be obtained by the action of solution of X on zinc Solution on X on treatment with the following forms an unstable hydroxide precipitate which decomposes to given an oxide precipitate :A. `HgCl_(2)`B. `ZnSO_(4)`C. `FeSO_(4)`D. `CuSO_(4)` |
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Answer» Correct Answer - A |
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| 385. |
`CaCO_(3)+HNO_(3)to`productsA. `Ca(NO_(3))_(2),H_(2)O,CO_(2)`B. `Ca(NO_(3))_(2) ,H_(a)CO_(3)`C. `Ca_(3)N_(2),CO_(2),H_(2)O`D. None of these |
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Answer» Correct Answer - A |
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| 386. |
CAUSTIC SODAA. `Br(OH)_(2)`B. BeOC. `Na_(2)[Be(OH)_(4)]`D. `Be(OH)_(2).BeCO_(3)` |
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Answer» Correct Answer - C |
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| 387. |
The quantum numbers for the outer electrons of an atom are given by `n = 2, l = 0, m = 0, s = +1//2`A. BoronB. LithiumC. HydrogenD. Sodium |
| Answer» Correct Answer - B | |
| 388. |
KI combines with `I_(2)` and forms polyiodide . The number of hybrid orbitals on the central iodine atom is `"_____"` . |
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Answer» Correct Answer - 5 |
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| 389. |
KI combines with `I_(2)` and forms polyiodide . The number of hybrid orbitals on the central iodine atom is `"_____"` . |
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Answer» Correct Answer - A-p,r,s , B - p,q,r , C-p,r , D-p,q,s |
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| 390. |
In `CsCl,` if the co-ordination number of `Cs^(+)` is 8 then co-ordination number of `Cl^(-)` ion isA. 8B. 16C. 6D. 4 |
| Answer» Correct Answer - A | |
| 391. |
Identify the correct statementA. A) gypsum is obtained by heating plaster of parisB. plaster of paris is obtained by hyration of gypumC. Plaster of paris is contaion higher percentage of calcium than soes gypsumD. Plaster of paris is obtainted from gysum by oxidation |
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Answer» Correct Answer - C |
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| 392. |
Which of the following does not produce any gaseous product when reacts with water?A. `Ca_(3)N_(2)`B. `CaC_(2)`C. `CaO`D. `Ca_(3)P_(2)` |
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Answer» Correct Answer - C |
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| 393. |
Compound X and Y are obtained by the reaction of `Cl_(2)` with cold and dilute solution of NaOH and compounds X and Z are formed with hot and concentrated slution of NaOH. The compound Y and Z repeactively areA. `NaCl, NaClO`B. `NaClO, NaClO_(3)`C. `NaCl, NaClO_(3)`D. `NaClO, HCl` |
| Answer» Correct Answer - B | |
| 394. |
Sodium metal was heated in excess of air and then product was treated with cold dilute `H_(2)SO_(4)` . The final products obtained areA. `Na_(2)SO_(4)` and `H_(2)O_(2)`B. `Na_(2)SO_(4) , SO_(2)` and `H_(2)O`C. `Na_(2)SO_(4)` and `NaOH`D. `Na_(2)SO_(4), O_(2)` and `H_(2)O` |
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Answer» Correct Answer - A |
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| 395. |
The compound that gives hydrogen peroxide on treatment with a dilute cold acid is:A. `PbO_(2)`B. `Na_(2)O_(2)`C. `MnO_(2)`D. `SnO_(2)` |
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Answer» Correct Answer - B |
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| 396. |
Which of the following atom is diamagnetic?A. `Be^(2+)`B. MgC. `Mg^(2+)`D. `Ca^(2+)` |
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Answer» Correct Answer - 2 |
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| 397. |
BeO is least soluble inA. Pure waterB. `BeCl_(2_((aq)`C. dil HClD. dil `NaOH_(aq)` |
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Answer» Correct Answer - 1 |
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| 398. |
Nitrogen dioxide cannot be obtained by heatingA. `KNO_(3)`B. `Pb(NO_(3))_(2)`C. `Cu(NO_(3))_(2)`D. `AgNO_(3)` |
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Answer» Correct Answer - A |
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| 399. |
`Na_(2)CO_(3)+Fe_(2)O_(3)rarr A+CO_(2)`, what is A in the reaction ?A. `NaFeO_(2)`B. `Na_(3)FeO_(3)`C. `Fe_(3)O_(4)`D. `Na_(2)FeO_(2)` |
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Answer» Correct Answer - A |
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| 400. |
In `LiAlH_(4)`, metal Al is present in :A. anionic partB. cationic partC. in both anionic and cationic partD. neither in cationic nor in anionic part |
| Answer» Correct Answer - A | |