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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.
| 7251. |
Between van der Waals forces and dipole-dipole attractions, which are stronger? Why? |
| Answer» Solution :Dipole-dipole ATTRACTIONS are stronger as they EXIST between opposite PARTIAL charges. Van der WAALS forces are WEAKER as they exist between the nucleus of one atom and the electrons of the other atom. | |
| 7252. |
Between LiF and LiI, which has the higher lattice energy and why? |
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Answer» SOLUTION :(i) comparison of the size of the ANIONS (ii) FACTORS affecting the LATTICE energy |
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| 7253. |
Besides gallium, which other elements have since been discovered that were left by Mendeleev in his Periodic Table ? (Any two) |
| Answer» SOLUTION :SCANDIUM, GERMANIUM. | |
| 7254. |
In Mendeleev's Periodic Table, gaps were left for the elements to be discovered later. Which of the following elements found a place in the periodic table later ? |
| Answer» SOLUTION :SCANDIUM (SC) and GERMANIUM (GE). | |
| 7255. |
Besides gallium, which other elements have since been discovered that were left by Mendeleev in his periodic table? (any two) |
| Answer» SOLUTION :Besides GALLIUM, MENDELEEV had LEFT GAPS for germanium and scandium in his periodic table. | |
| 7256. |
Besides gallium, which other elements have since been discovered that were left by Mendeleev inhis Periodic Table? |
| Answer» SOLUTION :SCANDIUM and GERMANIUM | |
| 7257. |
Besides gallium, which other elements have since been discovered that were left by Mendeleev in his periodic Table ? |
| Answer» SOLUTION :SCANDIUM and GERMANIUM. | |
| 7258. |
Benzene is an aromatic compound and has a ring structure. Its molecular formula is |
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Answer» `C_6H_4` |
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| 7259. |
Bell metal is an alloy of _____. |
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Answer» Cu, Zn |
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| 7261. |
Because of high electropositively, the atoms of metals can easly form |
| Answer» Answer :A | |
| 7262. |
Bauxite ore is purified by ……………… . |
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Answer» Leaching PROCESS |
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| 7264. |
Bauxite is an ore of which metal |
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Answer» Iron |
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| 7266. |
Basicity of acetic acid is |
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Answer» 4 |
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| 7267. |
Basic salts are formed by neutralization of |
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Answer» STRONG ACID and strong BASE |
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| 7270. |
Based on the group valency of elements state the formula for the following giving justification for each : (i) Oxides of 1^(st) group elements, (ii) Halides of the elements of group 13, and (iii) Compounds formed when an element of group 2 combines with, an element of group 16. |
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Answer» Solution :(i) Valency of group 1 ELEMENTS = 1 Valency of oxygen = 2 Oxides of group 1 elements : FORMULA of the oxides of group 1 is `M_(2)O`, where M is the group 1 element and O is oxygen. (ii) Valency of group 13 elements = 3 Valency of halogens = 1 Halides of group 13 elements : Formula of the halides of group 13 is `MX_(3)`, where M is the group 13 element and X is HALOGEN. (iii) Valency of group 2 elements = 2 Valency of group 16 elements = 2 Compounds of group 2 and group 16 elements : Formula of the compounds of group 2 and 16 is MN, where M is the group 2 element and N is the group 16 element. |
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| 7271. |
Based on the group valency of elements state the formula for the following giving justification for each: i] Oxides of Ist group elements, ii] Halides of the elements of group 13, and iii] Compounds formed when an element of group 2 combines with elements of group 16 . |
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Answer» Solution :i] First-group elements have a VALENCY +1 and oxygen has valency-2. Hence, their OXIDES have the FORMULA `M_2O` ii] Group 13 elements have valency +3 and CHLORINE has valency -1. Hence, their halides have formula `MCI_3` iii) Elements of group 2 have a valency +2 while elements of group 16 have a valency -2. Hence, their COMPOUNDS have the formula MX. |
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| 7272. |
Barium sulphate dissolves in which of the following ? |
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Answer» Dilute HYDROCHLORIC acid |
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| 7273. |
Barium chloride reacts with aluminium sulphate to give aluminium chloride and barium sulphate. (i) State the two types in which the above reaction can be classified. (ii) Translate the above statement into a chemical equation . |
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Answer» SOLUTION :(i) Double DISPLACEMENT reaction and Precipitation reaction . (ii) `3BaCl_(2)+Al_(2)(SO_(4))_(3)rarr2AlCl_(3)+3BaSO_(4)DARR` |
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| 7274. |
Barium chloride on reacting with ammonium sulphate forms barium sulphate and ammonium chloride. Which of the followng correctly represents the type of the reaction involved ? (i) Displacement reaction (ii) Precipitation reaction (iii) Combination reaction (iv) Double displacement reaction |
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Answer» (i) only |
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| 7275. |
Balloons of 2 L capaicty are to be filled with hydrogen, at a pressure of 1 atm and27^(@)C temperature, from an 8 L cylinder containing hydrogen at 10 atm, at thesame temperature . Calculate thenumber of balloons that can be filled. |
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Answer» SOLUTION :(i) APPLICATION of ideal gas equation (ii) calculation of volume at 1 atmospheric pressure (iii) determination of NUMBER of ballons (iv) 40balloons |
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| 7276. |
Balanced the following chemical equations : NaOH+H_(2)SO_(4)toNa_(2)SO_(4)+H_(2)O. |
| Answer» SOLUTION :`2NaOH+H_(2)SO_(4)toNa_(2)SO_(4)+2H_(2)O`. | |
| 7277. |
Balanced the following chemical equations : NaCl+AgNO_(3)toAgCl+NaNO_(3). |
| Answer» SOLUTION :It.s ALREADY BALANCED. | |
| 7278. |
Balanced the following chemical equations : HNO_(3)+Ca(OH)_(2)toCa(NO3)_(2)+H_(2)O |
| Answer» SOLUTION :`2HNO_(3)+CA(OH)_(2)toCa(NO_(3))_(2)+2H_(2)O`. | |
| 7279. |
Balanced the following chemical equations : BaCl_(2)+H_(2)SO_(4)toBaSO_(4)+HCl. |
| Answer» SOLUTION :`BaCl_(2)+H_(2)SO_(4) to BaSO_(4)+2HCL`. | |
| 7280. |
Balance the following equation : Fe+H_(2)OtoFe_(3)O_(4)+H_(2) |
| Answer» Solution :`3Fe+4H_(2)O to Fe_(3)O_(4)+4H_(2)` | |
| 7281. |
Balance the following chemical equations : Pb(NO_(3))_(2)overset("Heat")(to)PbO+NO_(2)+O_(2) |
| Answer» SOLUTION :`2Pb(NO_(3))_(2)overset("HEAT")(to)2PbO+4NO_(2)+O_(2)` | |
| 7282. |
Balance the following chemical equations : NH_(3)+CuO to Cu+N_(2)+H_(2)O |
| Answer» SOLUTION :`2NH_(3)+3CuOto3Cu+N_(2)+3H_(2)O`. | |
| 7283. |
Balance the following chemical equations : NaOH+H_(2)SO_(4)toNaSO_(4)+H_(2)O |
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Answer» Solution :Balanced CHEMICAL EQUATIONS are given as under : `2NaOH+H_(2)SO_(4)toNa_(2)SO_(4)+2H_(2)O` |
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| 7284. |
Balance the following chemical equations. NaOH+H_2SO_4toNa_2SO_4+H_2O |
| Answer» SOLUTION :`2NaOH+H_2SO_4toNa_2SO_4+2H_2O` | |
| 7285. |
Balance the following chemical equations : NaCl+AgNO_(3)toAgCl+NaNO_(3) |
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Answer» SOLUTION :Balanced CHEMICAL EQUATIONS are GIVEN as under : `NaCl+AgNO_(3)toAgCl+NaNO_(3)` |
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| 7286. |
Balance the following chemical equations. NaCl+AgNO_3toAgCl+NaNO_3 |
| Answer» SOLUTION :`NaCl+AgNO_3toAgCl+NaNO_3` | |
| 7287. |
Balance the following chemical equations : Mg+N_(2)toMg_(3)N_(2) |
| Answer» SOLUTION :`3Mg+N_(2)toMg_(3)N_(2)`. | |
| 7288. |
Balance the following chemical equations : (i) NaOH+H_(2)SO_(4) toNa_(2)SO_(4)+H_(2)O (ii) PbO+C to Pb+CO_(2) (iii) Fe_(2)O_(3)+Al to Al_(2)O_(3)+Fe+"Heat" |
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Answer» Solution :(i) `2NaOH+H_(2)SO_(4) to Na_(2)SO_(4)+2H_(2)O` (II) `2PbO+C to 2Pb+CO_(2)` (III) `Fe_(2)O_(3)+2AL to Al_(2)O_(3)+2Fe+"Heat"` |
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| 7289. |
Balance the following chemical equations : HNO_(3)+Ca(OH)_(2)toCa(NO_(3))_(2)+H_(2)O |
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Answer» SOLUTION :BALANCED chemical equations are given as under : `2HNO_(3)+Ca(OH)_(2)toCa(NO_(3))+2H_(2)O` |
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| 7290. |
Balance the following chemical equations. HNO_3+Ca(OH)_2toCa(NO_3)_2+H_2O |
| Answer» SOLUTION :`2HNO_3+Ca(OH)_2toCa(NO_3)_2+2H_2O` | |
| 7291. |
Balance the following chemical equations. BaCl_2+H_2SO_4toBaSO_4+HCl |
| Answer» SOLUTION :`BaCl_2+H_2SO_4toBaSO_4+2HCl` | |
| 7292. |
Balance the following chemical equations : BaCl_(2)+H_(2)SO_(4)toBaSO_(4)+HCl |
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Answer» Solution :Balanced chemical EQUATIONS are GIVEN as under : `BaCl_(2)+H_(2)SO_(4)toBaSO_(4)+2HCL` |
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| 7293. |
Balance the following chemical equations and state whether they are exothermic or endothermic : (i) Na+H_(2)O rarr NaOH+H_(2) (ii) FeSO_(4) rarr Fe_(2)O_(3)+SO_(2)+SO_(3) |
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Answer» Solution :(i) `2Na+2H_(2)O rarr 2NaOH+H_(2)` It is an EXOTHERMIC reaction. (ii) `2FeSO_(4)(S) rarrFe_(2)O_(3)+SO_(2)(G)+SO_(3)(g)` It is an endothermic reaction. |
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| 7294. |
Balance the following chemical equations : Al+Cl_(2)toAlCl_(3) |
| Answer» SOLUTION :`2Al+3Cl_(2)to2AlCl_(3)` | |
| 7295. |
Balance the following chemical equations: (a) HNO_(3)+Ca(OH)_(2)rarrCa(NO_(3))_(2)+H_(2)O (b) NaOH+H_(2)SO_(4)rarrNa_(2)SO_(4)+H_(2)O (c ) NaCl+AgNO_(3)rarrAgCl+NaNO_(3) (d) BaCl_(2)+H_(2)SO_(4)rarrBaSO_(4)+HCl |
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Answer» Solution :(a) `2HNO_(3)+Ca(OH)_(2)rarrCa(NO_(3))_(2)+2H_(2)O` (b) `2NaOH+H_(2)SO_(4)rarrNa_(2)SO_(4)+2H_(2)O` (c ) `NaCl+AgNO_(3)rarrAgCl+NaNO_(3)` (d) `BaCl_(2)+H_(2)SO_(4)rarrBaSO_(4)+2HCl` |
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| 7296. |
Balance the following chemical equations : Al+Cl_(2) toAlCl_(3) |
| Answer» SOLUTION :`2Al+3Cl_(2)toAlCl_(3)`. | |
| 7297. |
Balance the following chemical equation Zn+HCl to ZnCl_(2)+H_(2) |
| Answer» SOLUTION :`Zn+2HCl toZnCl_(2)+H_(2)`. | |
| 7298. |
Balance the following chemical equation: Pb(NO_(3))_(2)(s)overset("Heat")rarrPbO(s)+NO_(2)(g)+O_(2)(g) |
| Answer» SOLUTION :`2Pb(NO_(3))_(2)(s)overset("HEAT")rarr2PbO(s)+4NO_(2)(G)+O_(2)(g)` | |
| 7299. |
Balance the following chemical equation P_(4)+O_(2)toP_(2)O_(5) |
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Answer» <P> Solution :`P_(4)+5O_(2)to2P_(2)O_(5)`. |
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| 7300. |
Balance the following chemical equation : NaOH+H_(2)SO_(4)toNa_(2)SO_(4)+H_(2)O |
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Answer» SOLUTION :The balanced chemical EQUATION is : `2NaOH+H_(2)SO_(4)toNa_(2)SO_(4)+2H_(2)O` |
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