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. |
How many grams of : (a) Al are present in 0.2 mole of it, (b) HCl are present in 0.1 mole of it? (c) H2O are present in 0.2 mole of it, (d) CO2 is present in 0.1 mole of it? |
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Answer» How many grams of : |
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| 2. |
The unit cell of an ionic compound is a cube in which cations (A) occupy each of the corners and anions (B) are at the centres of each face. The simplest formula of the ionic compound is ? |
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Answer» The unit cell of an ionic compound is a cube in which cations (A) occupy each of the corners and anions (B) are at the centres of each face. The simplest formula of the ionic compound is ? |
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| 3. |
Mole fraction of urea in its aqueous solution is0.02, then its molality will be |
| Answer» Mole fraction of urea in its aqueous solution is0.02, then its molality will be | |
| 4. |
Which type of carbon is actually called 'alpha-carbon' ? |
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Answer» Which type of carbon is actually called 'alpha-carbon' ? |
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| 5. |
White vitriol is a hydrated sulphate of which one of the following metals? |
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Answer» White vitriol is a hydrated sulphate of which one of the following metals? |
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| 6. |
All the elements of a group have: |
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Answer» All the elements of a group have: |
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| 7. |
the aq solution of sodium acetate with mimimum pH is a .01M b .001M c .0001M d .1 |
| Answer» the aq solution of sodium acetate with mimimum pH is a .01M b .001M c .0001M d .1 | |
| 8. |
Which of the following is an organic compound? |
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Answer» Which of the following is an organic compound? |
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| 9. |
The product formed in the following chemical reaction is : |
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Answer» The product formed in the following chemical reaction is : |
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| 10. |
Is Hydrochloric acid a pure substance? If so why? |
| Answer» Is Hydrochloric acid a pure substance? If so why? | |
| 11. |
Write the colour of the following salts:(a) Cuprous salts(b) Cupric salts(c) Aluminium salts(d) Ferrous salts(e) Ferric salts(f) Calcium salts |
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Answer» Write the colour of the following salts: (a) Cuprous salts (b) Cupric salts (c) Aluminium salts (d) Ferrous salts (e) Ferric salts (f) Calcium salts |
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| 12. |
Give reasons for the following:(a) Solid sodium chloride does not conduct electricity while sodium chloride-solution conducts. |
| Answer» Give reasons for the following:(a) Solid sodium chloride does not conduct electricity while sodium chloride-solution conducts. | |
| 13. |
Why does the ionization energy increases with the increase in the penetration power of the element? |
| Answer» Why does the ionization energy increases with the increase in the penetration power of the element? | |
| 14. |
For which of the following solutions pH=pKa? a)100 ml of 0.1 M CH3COOH+200 ml of0.1 M CH3COONa b)100 ml of 0.1 M CH3COOH+50ml of 0.1 M NaOH c)100 ml of 0.1 M CH3COOH +100 ml of 0.1 M NaOH d100 ml of 0.1 M CH3COOH +100 ml of0.1 M NH |
| Answer» For which of the following solutions pH=pKa? a)100 ml of 0.1 M CH3COOH+200 ml of0.1 M CH3COONa b)100 ml of 0.1 M CH3COOH+50ml of 0.1 M NaOH c)100 ml of 0.1 M CH3COOH +100 ml of 0.1 M NaOH d100 ml of 0.1 M CH3COOH +100 ml of0.1 M NH | |
| 15. |
The equilibrium constant (K) for the reaction,2SO2(g)+O2(g)2S03(g) at 1000 K is 3.5 atmWhat would be the partial pressure of oxygen gas,if the equilibrium is found to have equal moles ofSO2 and SO3? |
| Answer» The equilibrium constant (K) for the reaction,2SO2(g)+O2(g)2S03(g) at 1000 K is 3.5 atmWhat would be the partial pressure of oxygen gas,if the equilibrium is found to have equal moles ofSO2 and SO3? | |
| 16. |
When but-1-en-3-yne reacts with HBr, the H+ adds to the triple bond. Why? If the H+ would have added to the double bond it would have given a resonance stabilized carbocation. On adding to the triple bond, a highly unstable vinyl carbocation is formed. Then why H+ adds to the triple bond? Though the addition to triple bond gives a resonance stabilized alkene, but what is more important : stable intermediate or stable product? |
| Answer» When but-1-en-3-yne reacts with HBr, the H+ adds to the triple bond. Why? If the H+ would have added to the double bond it would have given a resonance stabilized carbocation. On adding to the triple bond, a highly unstable vinyl carbocation is formed. Then why H+ adds to the triple bond? Though the addition to triple bond gives a resonance stabilized alkene, but what is more important : stable intermediate or stable product? | |
| 17. |
why HF has hydrogen bonds but H2S does not?how NaOH has both covalent and ionic bond? |
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Answer» why HF has hydrogen bonds but H2S does not? how NaOH has both covalent and ionic bond? |
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| 18. |
List the importance of pH in everyday life. |
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Answer» List the importance of pH in everyday life. |
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| 19. |
45. Which molecule contains both polar andcovalent bond?(1) NH,+(2) HCI(3) CH(4) H202 |
| Answer» 45. Which molecule contains both polar andcovalent bond?(1) NH,+(2) HCI(3) CH(4) H202 | |
| 20. |
Phof Ca(OH)2 is 12.Milliequalents of Ca(OH)2 present in 100ml solution will be |
| Answer» Phof Ca(OH)2 is 12.Milliequalents of Ca(OH)2 present in 100ml solution will be | |
| 21. |
Which of the following methods is best suited for the concentration of bauxite ore? |
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Answer» Which of the following methods is best suited for the concentration of bauxite ore? |
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| 22. |
Among Na, Hg, S, Pt and graphite, which can be used aselectrodes in electrolytic cells having aqueous solutions?(a) Hg and Pt(c) Na and S(b) Hg, Pt and graphite(d) Na, Hg and S |
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Answer» Among Na, Hg, S, Pt and graphite, which can be used as electrodes in electrolytic cells having aqueous solutions? (a) Hg and Pt (c) Na and S (b) Hg, Pt and graphite (d) Na, Hg and S |
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| 23. |
From the following balances extracted from the book of M/s Manju Chawla on March 31, 2010. You are requested to prepare the trading and profit and loss account and a balance sheet as on this date. Account TitleAmt. (Rs.)Amt. (Rs.)Opening Stock10,000Purchases and Sales40,00080,000Returns200600Wages6,000Dock and Clearing Charges4,000Lighting500Miscellaneous Income6,000Rent2,000Capital40,000Drawings2,000Debtors and Creditors6,0007,000Cash3,000Investment6,000Patents4,000Land and Machinery43,000Donations and Charity600Sales Tax Collected1,000Furniture11,300¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯1,36,600––––––––––¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯1,36,600–––––––––– Closing Stock was. Rs 2,000. (a) Interest on drawings 7% and interest on capital 5%. (b) Land and machinery is depreciated at 5%. (c) Interest on investment 6%. (d) Unexpired rent Rs 100. (e) Charge 5% depreciation on furniture. |
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Answer» From the following balances extracted from the book of M/s Manju Chawla on March 31, 2010. You are requested to prepare the trading and profit and loss account and a balance sheet as on this date. Account TitleAmt. (Rs.)Amt. (Rs.)Opening Stock10,000Purchases and Sales40,00080,000Returns200600Wages6,000Dock and Clearing Charges4,000Lighting500Miscellaneous Income6,000Rent2,000Capital40,000Drawings2,000Debtors and Creditors6,0007,000Cash3,000Investment6,000Patents4,000Land and Machinery43,000Donations and Charity600Sales Tax Collected1,000Furniture11,300¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯1,36,600––––––––––¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯1,36,600–––––––––– Closing Stock was. Rs 2,000. (a) Interest on drawings 7% and interest on capital 5%. (b) Land and machinery is depreciated at 5%. (c) Interest on investment 6%. (d) Unexpired rent Rs 100. (e) Charge 5% depreciation on furniture. |
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| 24. |
Compare the dipole moment and bond angle of the following compounds- 1)H_2O 2)NH_3 3)CH_4 4)SF_4 |
| Answer» Compare the dipole moment and bond angle of the following compounds- 1)H_2O 2)NH_3 3)CH_4 4)SF_4 | |
| 25. |
53. difference in atomic radius is maximum for(a) Rb-Cs(b) K-Rb(c)Na-K(d) Li-Na Explain with reason |
| Answer» 53. difference in atomic radius is maximum for(a) Rb-Cs(b) K-Rb(c)Na-K(d) Li-Na Explain with reason | |
| 26. |
Answer the following questions related to salts and their preparations : (a) What is a 'salt'? (b) What kind of salt is prepared by precipitation? (c) Name a salt prepared by a direct combination. Write an equation for the reaction that takes place in preparing the salt you have named. (d) Name the procedure used to prepare a sodium salt such as sodium sulphate. |
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Answer» Answer the following questions related to salts and their preparations : (a) What is a 'salt'? (b) What kind of salt is prepared by precipitation? (c) Name a salt prepared by a direct combination. Write an equation for the reaction that takes place in preparing the salt you have named. (d) Name the procedure used to prepare a sodium salt such as sodium sulphate. |
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| 27. |
The density of sulphuric acid is ___ the density of water. |
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Answer» The density of sulphuric acid is |
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| 28. |
Balance the following chemical equation.Na + O2 → Na2OCa + N2 → Ca3N2N2 + H2 →NH3CaCO3 +HCl → CaCl2 + CO2 +H2O |
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Answer» Balance the following chemical equation. Na + O2 → Na2O Ca + N2 → Ca3N2 N2 + H2 →NH3 |
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| 29. |
Define or explain the meaning of the term 'acid salt'. |
| Answer» Define or explain the meaning of the term 'acid salt'. | |
| 30. |
23.The outer face of a rec†an gular slabmade of equal thickness of iron and brassare maintainedat 100 dgreeC and 0 degree C respectively. The temperature at the interface is(Thermal conductivity of iron and brass are 0.2 and 0.3 respectively.)(1) 100^° C(3) 50^° Cof a rectangular slab made of equal thickness of iron and brass are maintained at 100^° 0and(2)(4)40^° C70^° C |
| Answer» 23.The outer face of a rec†an gular slabmade of equal thickness of iron and brassare maintainedat 100 dgreeC and 0 degree C respectively. The temperature at the interface is(Thermal conductivity of iron and brass are 0.2 and 0.3 respectively.)(1) 100^° C(3) 50^° Cof a rectangular slab made of equal thickness of iron and brass are maintained at 100^° 0and(2)(4)40^° C70^° C | |
| 31. |
What are products formed when barium hydroxide reacts with ammonium chloride?? |
| Answer» What are products formed when barium hydroxide reacts with ammonium chloride?? | |
| 32. |
maximum electron in 3rd shell having ml=2 will be |
| Answer» maximum electron in 3rd shell having ml=2 will be | |
| 33. |
L.P.G. cylinder can withstand a pressure of 14.9 atmosphere. The pressure gauge of the cylinder indicates 12 atmosphere at 27∘C Due to a sudden fire in the building the temperature rises. At what temperature will the cylinder explode. |
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Answer» L.P.G. cylinder can withstand a pressure of 14.9 atmosphere. The pressure gauge of the cylinder indicates 12 atmosphere at 27∘C Due to a sudden fire in the building the temperature rises. At what temperature will the cylinder explode. |
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| 34. |
A 5.0 mmol dm−3 aqueous solution of KCl has a conductance of 0.55 mS when measured in a cell of cell constant 1.3 cm−1. The molar conductivity of this solution is (mS) m2 mol−1. (Round off to the nearest integer). |
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Answer» A 5.0 mmol dm−3 aqueous solution of KCl has a conductance of 0.55 mS when measured in a cell of cell constant 1.3 cm−1. The molar conductivity of this solution is |
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| 35. |
What is the colour of calcium bi carbonate? |
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Answer» What is the colour of calcium bi carbonate? |
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| 36. |
A compound X is added to ester after which ester is converted back to alcohol and a compound which is a salt of A and carboxylic acid. Identify X |
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Answer» A compound X is added to ester after which ester is converted back to alcohol and a compound which is a salt of A and carboxylic acid. Identify X |
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| 37. |
The difference in the formula and molecular masses of CH3OH and C2H5OH is: |
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Answer» The difference in the formula and molecular masses of CH3OH and C2H5OH is: |
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| 38. |
4nh3 + 5o2 --> 4no+ 6h2o2no + o2 --> 2no23no2 + h2o --> 2hno3 + no11.2 l of nho3 react at stp with excess of o2 according to the above reaction. The mass of hno3 formed is |
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Answer» 4nh3 + 5o2 --> 4no+ 6h2o 2no + o2 --> 2no2 3no2 + h2o --> 2hno3 + no 11.2 l of nho3 react at stp with excess of o2 according to the above reaction. The mass of hno3 formed is |
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| 39. |
For the following balanced equation :aFe2++bCr2O2−7+cH+⟶dFe3++eCr3++ fH2OThe value of a+b+c+d+e+f is :36 |
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Answer» For the following balanced equation : aFe2++bCr2O2−7+cH+⟶dFe3++eCr3++ fH2O The value of a+b+c+d+e+f is :
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| 40. |
Write any two examples of decompostion reaction. |
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Answer» Write any two examples of decompostion reaction. |
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| 41. |
3. IUPAC of the following compound will be? CH3-CH=CH-CCH |
| Answer» 3. IUPAC of the following compound will be? CH3-CH=CH-CCH | |
| 42. |
ntwhats lewis acid and lewis basen |
| Answer» ntwhats lewis acid and lewis basen | |
| 43. |
2Na+Cl2 gives 2NaCl Here addition of electropositive element(Na) And addition of electronegative element(Cl) Takes place. Is this a redox reaction |
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Answer» 2Na+Cl2 gives 2NaCl Here addition of electropositive element(Na) And addition of electronegative element(Cl) Takes place. Is this a redox reaction |
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| 44. |
Find the empirical formula of the compounds with the following percentage composition. Pb = 62.5%; N = 8.5 %. O = 29.0% |
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Answer» Find the empirical formula of the compounds with the following percentage composition. |
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| 45. |
Why hydroxide ion does not combine with water molecule? |
| Answer» Why hydroxide ion does not combine with water molecule? | |
| 46. |
Solid sodium bicarbonate was placed on a strip of pH paper. The colour of the strip:(1) turned blue(2) did not change(3) turned green and suddenly yellow(4) turned light pink |
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Answer» Solid sodium bicarbonate was placed on a strip of pH paper. The colour of the strip: (1) turned blue (2) did not change (3) turned green and suddenly yellow (4) turned light pink |
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| 47. |
maximum number of spectral lines obtained in balmer series when electron from fourth excited state falls to the ground state in hydrogen atom i |
| Answer» maximum number of spectral lines obtained in balmer series when electron from fourth excited state falls to the ground state in hydrogen atom i | |
| 48. |
Which of the following compounds are halo compounds? |
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Answer» Which of the following compounds are halo compounds? |
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| 49. |
KOH+CO3(PO4)2----------K3PO4+CO(OH)2 |
| Answer» KOH+CO3(PO4)2----------K3PO4+CO(OH)2 | |
| 50. |
79 No.of structural isomer possible for C6H14 |
| Answer» 79 No.of structural isomer possible for C6H14 | |