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This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Statement - 1 . Sodium metal is softer than potassium metal . Statement-2 . Metallic bonding in potassium |
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Answer» Statement-1 is TRUE, Statement-2 is True, Statement-2 is a correct explanation for statement-1. |
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| 2. |
Statement-1. Simple carbanions are usually pyramidal but allyl carbanion is a planar species. Statement-2. All the carbon atoms in allyl carbanion are sp^(2)-hybridized. |
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Answer» Statement-1 is TRUE, Statement-2 is True, Statement-2 is a correct EXPLANATION for statement-1. |
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| 3. |
Statement 1 Silver can be precipitated by addingzinc powder to AgNO_(3) solution Statement 2 ZnSO_(4) solution can be stirred with a silver spoon |
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Answer» Statement 1 is TRUE statement 2 is true , statement 2 is a corrrect EXPLANATION for statement 1 |
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| 4. |
Statement-1. (SiH_(3))_(H)Nisa weakerbase than (CH_(3))_(3)N. Statement-2. Due to ppi-dpi back bondingthe availabilityof electronson the N atom in (SiH_(3))+(3)N decreases. |
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Answer» Statement-1 is TRUE, Statement-2 is True , Statement-2 is a CORRECT EXPLANATION for statement-1. |
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| 5. |
Statement 1 : Radial part of wave function for 2s and 2p is not same . Statement 2 : Radial part of wave function depends upon ''n'' only and angular part of wave function depends upon ''I'' and ''m'' only. |
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Answer» STATEMENT 1 is true , statement 2 is true , statement 2 is a correct explanation for statement 1 Radial part DEPENDS upon n and l both |
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| 6. |
Statement-1. Propene reacts with HBr in presence of organic peroxide to give 1-bromopropane Statement-2. The reaction occurs through carbocation intermediate |
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Answer» Statement-1 is True, Statement-2 is True , Statement-2 is a correct explanation for Statement-1 |
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| 7. |
Statement-1. Photochemical smog is a combination of photons with smoke and fog. Statement-2. Photochemical smog is formed in the troposphere. |
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Answer» Statement-1 is TRUE, Statement-2 is True : Statement-2 is a correct EXPLANATION for Statement-1 |
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| 8. |
Statement -1. pH of HCl solution is less than that of acetic acid of the same concentration. Statement-2. In equimolar solutions, the number of titratable protons present in HCl is less than that present in acetic acid. |
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Answer» Statement-1 is True, Statement-2 is True , Statement-2 is the correct explanation of Statement - 1 . |
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| 9. |
Statement-1. pH of water increases with increase in temperature. Statement-2. K_(w) of water increases with increase in temperature. |
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Answer» Statement-1 is True, Statement-2 is True , Statement-2 is the correct explanation of Statement - 1 . |
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| 10. |
Statement 1: PF_(5) molecule is little less stable as compared to SF_(6) molecule. Statement :2 In PF_(5) molecule is little less stable as compared to SF_(6) molecule. |
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Answer» Statemetn-1 is true, Statrment-2 is also true, STATEMENT -2 is the CORRECT explanation of statement-4 |
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| 11. |
Statement-1. Pb^(4+) compoundsare stronger oxidizing agent than Sn^(4+) compounds. Statement-2.The higher oxidation statesfor the group 14 elements are more stable for the heavier members of the group due to inert pair effect. |
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Answer» Statement-1 is True, Statement-2 is True , Statement-2 is a correct explanation for statement-1. |
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| 12. |
Statement-1. Oxidation number of Ni in Ni(CO)_(4), is zero Statement-2. Oxidation number of CO has been taken as zero. |
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Answer» STATEMENT -1 is TRUE, statement -2 is ALSO true, statement -2 is the correct explanation of statement-1 |
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| 13. |
Statement -1. o-Nitrophenol has a higher boiling point than p-Nitrophenol. Statement-2. Intramolecular hydrogen bonding occurs in p-Nitro-phenol . |
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Answer» STATEMENT-1 is Ture , Statement-2 is Ture , Statement-2 is a correct explanation for Statement-1. BOILING point than p-Nirophenol. |
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| 14. |
Statement-1: NO_(3)^(-) and NO_(2)^(-) both do not give brown fumes with dil H_(2)SO_(4) Statement-2: Protonation of NO_(2)^(-) is more easier compared to NO_(3)^(-) since NO_(3)^(-) is more stable by resonance. |
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Answer» Statement-1 is TRUE, Statement-2 is True, Statement-2 is a CORRECT EXPLANATION for Statement-1. |
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| 15. |
Statement -1 NO_(3)^(-) and CO_(3)^(2-) ion both are triangularplanar. Statement-2 , Hybridization of central atom in both is sp^(2) . |
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Answer» Statement-1 is Ture , Statement-2 is Ture , Statement-2 is a correct EXPLANATION for Statement-1. |
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| 16. |
statement-1 : No tem in the concentration of a pure solid ora pure liquid appears in an equilibrium constant expression. statement-2 : Each pure solid or pure liquid is in a phase by itself, and has a constant concentration at constant temperature. |
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Answer» Statement-1 is TRUE, Statement-2 is True, Statement-2 is a CORRECT EXPLANATION for Statement-1. |
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| 17. |
Statement-1. Nitrenes cannot be isolated. Statement-2. Nitrenes are the nitrogen analogous of carbene. |
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Answer» Statement-1 is True, Statement-2 is True, Statement-2 is a CORRECT explanation for statement-1. |
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| 18. |
Statement-1. Most probable velocity is the velocity possesed by the maximum fraction of the molecules at a given temperature. Statement-2. On collision, more and more molecules acquire higher speed at the same temperature. |
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Answer» Statement-1 is true, statement-2 is also true, statement-2 is CORRECT EXPLANATION of statement-4 |
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| 19. |
Statement-1 : MgCl_2 solution produces lather with soap. Statement-2 : Hard water does not produce lather with soap. |
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Answer» If both the STATEMENTS are TRUE and statement-2 is the correct explanation of statement-1 |
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| 20. |
Statement-1: Me-C= and Me-oversetrarrN=C are not functional isomers. Statement-2: As in HCN cyanide and isocyanide groups are interconvetible into each other and remains in equilibium. |
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Answer» Statement-1 is TRUE, Statement-2 is True, Statement-2 is a CORRECT explanation for Statement-1. |
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| 21. |
Statement-1: LiHCO_(3) cannot exist in solid form. Statement-2: Li_(2)O has the highest thermal stability among the alkali metal oxide. |
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Answer» Statement-1 is TRUE, Statement-2 is True, Statement-2 is a CORRECT EXPLANATION for Statement-1. |
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| 22. |
Statement-1 . LiCl is covalent whereasNaCl is ionic. Statement-2. Greater the size of the cation, greater is its polarising power. |
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Answer» Statement-1 is Ture , Statement-2 is Ture , Statement-2 is a CORRECT EXPLANATION for Statement-1. cation, greater is its polarising power |
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| 23. |
Statement-1. Lassaigne's extract is boiled with dil. HNO_(3) before testing for halogens by AgNO_(3). Statement-2. CN^(-) and S^(2-) ions present in the extract interfere with the test of halide ions by AgNO_(3). |
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Answer» Statement-1 is TRUE, Statement-2 is True, Statement-2 is a CORRECT EXPLANATION for statement-1. |
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| 24. |
Statement-1 : KMnO_4 act as self indicator. Statement-2 : KMnO_4 only act as reducing agent. |
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Answer» If both the STATEMENTS are TRUE and statement-2 is the correct explanation of statement-1 |
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| 25. |
Statement-1: Ionization enthalpy of Be is greater than that of B.Statement-II: The nuclear charge of B is greater than that of Be. |
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Answer» Statement-I and II are CORRECT and statement. IL is the correct explanation of statement |
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| 26. |
Statement-1. In water, orthoboric acid behaves as a weak monobasic acid Statement-2. In water, orthoboric acid acts as a proton donor. |
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Answer» Statement-1 is TRUE, Statement-2 is True , Statement-2 is the correct explanation of Statement - 1 . `H_(3)BO_(3)+H_(2)O hArr B(OH)_(4)^(-)+H^(+)` It does not donate proton but accepts `OH^(-)` ion from water. Thus, statement-1 is true but statement -2 is false. |
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| 27. |
Statement-1. In water, orthoboric acid between as a weak monobasicacid. Statement-2. In water, orthoboric acid acts as a proton donor. |
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Answer» Statement-1 is True, Statement-2 is True , Statement-2 is a CORRECT explanation for statement-1. 
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| 28. |
statement-1 : In dilute aqueous solution, water is present is such large excess such that its concentration remains essentially constant during any reaction involving water. statement-2 : The term [H_(2)O] does not appear in any equilibrium constant expression for a reaction taking place in dilute aqueous solution. |
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Answer» Statement-1 is TRUE, Statement-2 is True, Statement-2 is a CORRECT EXPLANATION for Statement-1. |
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| 29. |
Statement-1 : In cation exchange process, H^+ exchanges for Na^+, Ca^(2+), Mg^(2+). Statement-2 : In anion exchang process OH^(-) exchanges for anion like Cl^(-), HCO_(3)^(-), SO_(4)^(2-). |
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Answer» If both the statements are TRUE and statement-2 is the CORRECT EXPLANATION of statement-1 |
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| 30. |
Statement-1:In Castner-kellner cell Na^(+) is reduced at mercury cathode. Statement-2: Standard reduction potential of hydrogen is higher than sodium. |
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Answer» Statement-1 is TRUE, Statement-2 is True. Statement-2 is a CORRECT EXPLANATION for Statement-1. |
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| 31. |
Statement-1: In any ionic solid, [MX] , with Schottky defects, the number of positive and negative ions are same. Statement-2:Equal number of cation and anion vacancies are present. |
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Answer» Statement 1 is TRUE , Statement-2 is True , Statement-2 is a CORRECT explanation for statement-1 |
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| 32. |
Statement-1. In B_(2)H_(6) there is no B-B bond. Statement-2. The B_(2)H_(6).2NH_(3) adducton heating givesborazine. |
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Answer» Statement-1 is True, Statement-2 is True , Statement-2 is a correct EXPLANATION for statement-1. |
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| 33. |
Statement -1. In any ionic solid, [ MX], with Schottky defects, the number of positive and negative ions are same. Statement -2. Equal number of cation and anion vacancies are present . |
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| 34. |
Statement-1 : In a titration of weak acid with strong base, the pH at the half equivalence point is pK_(a). Statement-2 : At half equivalence point, it will form acidic buffer at its maximum capacity where [Acid] = [Salt]. |
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Answer» If both the statements are true and STATEMENT -2 is the CORRECT explanation of statement-I |
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| 35. |
statement-1 :If the equation for a reaction is reversed, the equilibrium constant is inverted and if the equation is multiplied by 2, the equilibrium constant is squared. statement-2 : The numerical value of an equilibrium constant depends on the way the equation for the reactions is written. |
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Answer» Statement-1 is TRUE, Statement-2 is True, Statement-2 is a CORRECT EXPLANATION for Statement-1. |
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| 36. |
Statement -1. If free energy change of the system is negative, the process is spontaneous even if the total free energy change of the system and the surroundings is positive. Statement -2. The spontaneityof a process depends onlyon the free enegy change of the system. |
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Answer» STATEMENT -1 is TRUE, Statement-2 is True, Statement-2 is a CORRECT EXPLANATION of Statement-1 |
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| 37. |
Statement 1 HNOO_(2) acts both as an oxidising as well as reducing agent Statement 2 The O.N of N can increase above +3 and can also decrease below +3 |
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Answer» Statement 1 is true statement 2 is true , statement 2 is a corrrect explanation for statement 1 |
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| 38. |
Statement-1: Hydrogen is placed at the top of the group which is in-line with the latest periodic table. Statement-II: Hydrogen has a tendency to lose its electron to form H^(+), thus showing electropositive character like alkali metals. On the other hand, hydrogen has a tendency to gain an electron to yield H^(-) , thus showing electronegative character like halogens. |
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Answer» Statements-I and II are correct and STATEMENT-II is the correct EXPLANATION of statement |
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| 39. |
Statement-1: Hydrogen can be used as a clean burning fuel.Statement-II: Hydrogen on combustion give only water as end product and it is free from pollutants. |
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Answer» Statements-I and II are CORRECT and Statement-II is the correct EXPLANATION of statement-I. |
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| 40. |
Statement -1. HNO_(2) can act both as an oxidising agnet oas well as reducing agent Statement-2. In the O.S of N(+3) "in" HNO_(2) can undergo increase as well as decrease in its value |
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Answer» Statement -1 is TRUE, statement -2 is ALSO true, statement -2 is the correct explanation of statement-1 |
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| 41. |
Statement-1. HF is an electron-precise hydride. Statements-2. In HF,F has three lone pairs of electrons. |
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Answer» STATEMENT-1 is true, Statement-2 is True , Statement-2 is a correct EXPLANATION for statement-2 |
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| 42. |
Statement-1 : HF form extensive hydrogen bonding. Statement-2 : F has highest tendency to form hydrogen bonding. |
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Answer» If both the statements are TRUE and statement-2 is the CORRECT explanation of statement-1 |
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| 43. |
Statement-1: Heavy water has been widely used as moderator in nuclear reactors.Statement-11: Heavy water can lower the energies of fast moving neutrons. |
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Answer» Statements-I and II are CORRECT and Statement-Il is the correct EXPLANATION of statement-I. |
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| 44. |
Statement-1. HCO_(3)^(-) ion actas astrong acid as well as strong base. Statement-2. CO_(2)^(2-) ions act only as weak base. |
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Answer» Statement-1 is TRUE, Statement-2 is True , Statement-2 is the correct explanation of Statement - 1 . |
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| 45. |
Statement -1. HCIO_(4) is a stronger oxidising agent than HCIO_(3). Statement-2. Oxidation state of CI in HCIO_(4) is +7 and in HCIO_(3), it is +5. |
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| 46. |
STATEMENT -1:HCHO is more reactive then CH_(-3)COCH_(3) towards nucleophilic addition reactionSTATEMENT -2:In CH_(3)COCH_(3),- CH_(3) shows -I effect |
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| 47. |
Statement-1: H_(2)O_(2) can be used as an antichlor in bleaching Statement-2:It oxidises HCl"to"Cl_(2) |
| Answer» Solution :(c ) `H_(2)O_(2)` REDUCES `Cl_(2)` to HCl and THUS REMOVES chlorine. | |
| 48. |
Statement-1. H_(2)O_(2) decomposes NaHCO_(3) to evolve CO_(2) gas Statement-2. H_(2)O_(2) is a weaker acid than H_(2)CO_(3) acid. |
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Answer» STATEMENT-1 is true, Statement-2 is True , Statement-2 is a correct explanation for statement-4 |
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| 49. |
Statement 1: H_(2) molecule is more stable than H_(2)-HE molecule Statement 2: The antibonding electeon in H_(2)-He molecule destabilies. It. |
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Answer» Statemetn-1 is true, Statrment-2 is also true, Statement -2 is the CORRECT EXPLANATION of statement-2 |
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| 50. |
Statement-1 H_(2) molecule is more stable than HeH molecule . Statement -2 . The antibonding electron in the molecular destabilises it . |
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Answer» Statement-1 is Ture , Statement-2 is Ture , Statement-2 is a CORRECT explanation for Statement-1. than HEH because bond or der of `H_(2) = 1` , that of ` HeH = (1)/(2)` |
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