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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. |
41. The structure of a disaccharide M (molecular mass 342) is given below. Hydrolysis of the disaccharide gives two monosaccharides X and Y. Acetylation using acetic anhydride is one of the methods used in structure determination of carbohydrates. On the basis of the structure of M given below, select the correct option(s). (A) M is a non-reducing sugar. (B) On hydrolysis, M gives one aldohexose and one aldopentose. (C) If the specific rotation (α ) of X, Y and M are +52, 74 and +29 respectively, the mixture of X and Y, obtained upon hydrolysis of M is laevorotatory. (D) 0.171 g of M requires 0.153 g of acetic anhydride for complete acetylation. |
| Answer» 41. The structure of a disaccharide M (molecular mass 342) is given below. Hydrolysis of the disaccharide gives two monosaccharides X and Y. Acetylation using acetic anhydride is one of the methods used in structure determination of carbohydrates. On the basis of the structure of M given below, select the correct option(s). (A) M is a non-reducing sugar. (B) On hydrolysis, M gives one aldohexose and one aldopentose. (C) If the specific rotation (α ) of X, Y and M are +52, 74 and +29 respectively, the mixture of X and Y, obtained upon hydrolysis of M is laevorotatory. (D) 0.171 g of M requires 0.153 g of acetic anhydride for complete acetylation. | |
| 2. |
Radical CH³COO-1 Why charge on this radical is -1 H3 (3is in subscript) |
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Answer» Radical CH³COO-1 Why charge on this radical is -1 H3 (3is in subscript) |
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| 3. |
Which of the following orbitals does not exist according to quantum theory? |
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Answer» Which of the following orbitals does not exist according to quantum theory? |
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| 4. |
which of the following species is isostructural ,planar and non polar 1.ClF3,BrF3,xeo3 2. clo4^- ,so4^{2-},po4 ^{3-} 3.{I^-}_3,Hgcl2, xef2 4.{I^+}_3,xef3^{+ },s_3^{2- |
| Answer» which of the following species is isostructural ,planar and non polar 1.ClF3,BrF3,xeo3 2. clo4^- ,so4^{2-},po4 ^{3-} 3.{I^-}_3,Hgcl2, xef2 4.{I^+}_3,xef3^{+ },s_3^{2- | |
| 5. |
Which is most acidic oxide ? |
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Answer» Which is most acidic oxide ? |
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| 6. |
Which of the following reactions represent the thermite reaction? |
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Answer» Which of the following reactions represent the thermite reaction? |
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| 7. |
An irrational number is marked on the number line (C) as shown in fig. Then the value of C is ___. |
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Answer» An irrational number is marked on the number line (C) as shown in fig. Then the value of C is ___.
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| 8. |
Salol can be used in |
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Answer» Salol can be used in |
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| 9. |
Differentiate between metals and non-metal according to i) lustre and ii) physical state in room temperature. |
| Answer» Differentiate between metals and non-metal according to i) lustre and ii) physical state in room temperature. | |
| 10. |
The correct values of ionization enthalpies (in KJ mol−1) of Si, P, S and Cl respectively are: |
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Answer» The correct values of ionization enthalpies (in KJ mol−1) of Si, P, S and Cl respectively are: |
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| 11. |
The lattice enthalpy of KI will be, if the enthalpy of (I) Δ_fH^°(KI) = –78.0 kcal mol^{-1} (II) Ionisation energy of K to K+ is 4.0 eV (III) Dissociation energy of I_2 to I is 28.0 kcal mol^{-1} (IV) Sublimation energy of K is 20.0 kcal mol^{-1} (V) Electron gain enthalpy for I to I^- is –70.0 kcal mol^{-1} (VI) Sublimation energy of I2 is 14.0 kcal mol^{-1} (1 eV = 23.0 kcal mol^{-1}) Options: a) +14.1 kcal mol^{-1} b) -14.1 kcal mol^{-1} c) -141 kcal mol^{-1} d) +141 kcal mol^{-1 |
| Answer» The lattice enthalpy of KI will be, if the enthalpy of (I) Δ_fH^°(KI) = –78.0 kcal mol^{-1} (II) Ionisation energy of K to K+ is 4.0 eV (III) Dissociation energy of I_2 to I is 28.0 kcal mol^{-1} (IV) Sublimation energy of K is 20.0 kcal mol^{-1} (V) Electron gain enthalpy for I to I^- is –70.0 kcal mol^{-1} (VI) Sublimation energy of I2 is 14.0 kcal mol^{-1} (1 eV = 23.0 kcal mol^{-1}) Options: a) +14.1 kcal mol^{-1} b) -14.1 kcal mol^{-1} c) -141 kcal mol^{-1} d) +141 kcal mol^{-1 | |
| 12. |
The correct bondline structure of 4-hydroxy -4-methyl pentan-2-one is |
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Answer» The correct bondline structure of 4-hydroxy -4-methyl pentan-2-one is |
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| 13. |
Name the functional groups present in the following compounds:(a) CH3COCH2CH2CH2CH3(b) CH3CH2CH2COOH(c) CH3CH2CH2CH2CHO(d) CH3CH2OH |
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Answer» Name the functional groups present in the following compounds: (a) CH3COCH2CH2CH2CH3 (b) CH3CH2CH2COOH (c) CH3CH2CH2CH2CHO (d) CH3CH2OH |
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| 14. |
The number of hydrogen atom(s) which are attached to phosporous atom in hypophosphoric acid |
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Answer» The number of hydrogen atom(s) which are attached to phosporous atom in hypophosphoric acid |
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| 15. |
If radius of first bohr orbit of h atom is X and de Broglie wavelength of electron in an Orbit is at 8piex then value of n is |
| Answer» If radius of first bohr orbit of h atom is X and de Broglie wavelength of electron in an Orbit is at 8piex then value of n is | |
| 16. |
How many moles are there in CO2 |
| Answer» How many moles are there in CO2 | |
| 17. |
what are the laws of nature ?? |
| Answer» what are the laws of nature ?? | |
| 18. |
Identify the final product (B) in the following sequence of reactions: |
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Answer» Identify the final product (B) in the following sequence of reactions: |
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| 19. |
CH2CHCHCH2 and Br2 reaction at 180 degree celcius what wiil be the product |
| Answer» CH2CHCHCH2 and Br2 reaction at 180 degree celcius what wiil be the product | |
| 20. |
TEMPERATURE OF 100 GM OF WATER IS CHANGED FROM 0 DEGREE CELCIUS TO 3 DEGREE CELCIUS IN THIS PROCESS HEAT SUPPLIED TO WATER WILL BE |
| Answer» TEMPERATURE OF 100 GM OF WATER IS CHANGED FROM 0 DEGREE CELCIUS TO 3 DEGREE CELCIUS IN THIS PROCESS HEAT SUPPLIED TO WATER WILL BE | |
| 21. |
In CCP structure of compound XY, atom X is present at octahedral voids. The ratio of 6 th CN and 3th CN for an atom X located at body centre is |
| Answer» In CCP structure of compound XY, atom X is present at octahedral voids. The ratio of 6 th CN and 3th CN for an atom X located at body centre is | |
| 22. |
An ideal gas undergoes a reversible process in which the pressure varies linearly with volume. The conditions at the start (subscript 1) and at the end (subscript 2) of the process with usual notation are : p1=100kPa,V1=0.2m3 and p2=200kPa,V2=0.1m3 and the gas constant, required for the process (in kJ) is 15 |
Answer» An ideal gas undergoes a reversible process in which the pressure varies linearly with volume. The conditions at the start (subscript 1) and at the end (subscript 2) of the process with usual notation are : p1=100kPa,V1=0.2m3 and p2=200kPa,V2=0.1m3 and the gas constant, required for the process (in kJ) is
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| 23. |
In the reaction H-C≡ CH\xrightarrow[{CH3CH2Br}]{NaNH2/liq. NH3}X\xrightarrow[{CH3CH2Br}]{NaNH2/liq.NH3}Y X and Y ar |
| Answer» In the reaction H-C≡ CH\xrightarrow[{CH3CH2Br}]{NaNH2/liq. NH3}X\xrightarrow[{CH3CH2Br}]{NaNH2/liq.NH3}Y X and Y ar | |
| 24. |
Identify X in the reaction below : |
Answer» Identify X in the reaction below : |
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| 25. |
Convert 76 cm of mercury pressure to N/m^2 using the method of dimensions. |
| Answer» Convert 76 cm of mercury pressure to N/m^2 using the method of dimensions. | |
| 26. |
Why the sum of mole fractions of the components in solution ie equal to one (1)?? |
| Answer» Why the sum of mole fractions of the components in solution ie equal to one (1)?? | |
| 27. |
Butane-2-ol is[CPMT 1977, 89] |
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Answer» Butane-2-ol is[CPMT 1977, 89] |
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| 28. |
Li shows difference in properties than rest of the members of its group but shows similarities with: |
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Answer» Li shows difference in properties than rest of the members of its group but shows similarities with: |
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| 29. |
5.The molal elevation constant of water is 0.52 K/molality. The b.pt of 1 molal aq. KCl solution should be |
| Answer» 5.The molal elevation constant of water is 0.52 K/molality. The b.pt of 1 molal aq. KCl solution should be | |
| 30. |
The number of collisions per second per unit volume of the reaction mixture is known as: |
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Answer» The number of collisions per second per unit volume of the reaction mixture is known as: |
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| 31. |
The spin only magnetic moment value of B+2 species is x×10−2 B.M..[Given :√3=1.73] x is : (Nearest integer) |
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Answer» The spin only magnetic moment value of B+2 species is x×10−2 B.M.. [Given :√3=1.73] x is : (Nearest integer) |
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| 32. |
In an arrangement of two concentric conducting shell with centre at origin, charges q and 3q are given to inner and outer shell of radii a and 2a respectively. If they are connected by a conducting wire, then charge on inner shell is 1) 2q 2) -q 3) 4q 4) zero |
| Answer» In an arrangement of two concentric conducting shell with centre at origin, charges q and 3q are given to inner and outer shell of radii a and 2a respectively. If they are connected by a conducting wire, then charge on inner shell is 1) 2q 2) -q 3) 4q 4) zero | |
| 33. |
The only cations present in a slightly acidic solution are Fe3+,Zn2+ and Cu2+. The reagent that when added in excess of this solution would identify and separate Fe3+ in one step is: |
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Answer» The only cations present in a slightly acidic solution are Fe3+,Zn2+ and Cu2+. The reagent that when added in excess of this solution would identify and separate Fe3+ in one step is: |
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| 34. |
Zr and Hf exhibit similar properties |
| Answer» Zr and Hf exhibit similar properties | |
| 35. |
2.Two moles of an ideal monotonic gas is expanded such that initial pressure is halved. The initial state is (PoVo) and the thermodynamic process follows the equation Pt=constant. The change in internal energy of the gas is |
| Answer» 2.Two moles of an ideal monotonic gas is expanded such that initial pressure is halved. The initial state is (PoVo) and the thermodynamic process follows the equation Pt=constant. The change in internal energy of the gas is | |
| 36. |
43 CH3CHClCOOH + CH3CHDOH ------> ester Racemic mixture optically pure d isomer In the given reaction in acidic medium , the number of isomeric products formed is, A 1 B 2 C 3 D 4 |
| Answer» 43 CH3CHClCOOH + CH3CHDOH ------> ester Racemic mixture optically pure d isomer In the given reaction in acidic medium , the number of isomeric products formed is, A 1 B 2 C 3 D 4 | |
| 37. |
44. For a given solution molarity is 9 and molality is 10. If molar mass of solute is 40. The density of solution is |
| Answer» 44. For a given solution molarity is 9 and molality is 10. If molar mass of solute is 40. The density of solution is | |
| 38. |
Check the dimensional consistency Fs=1/2mv2 -1/2mu2 |
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Answer» Check the dimensional consistency Fs=1/2mv2 -1/2mu2 |
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| 39. |
If the gaseous medium of the sun has pressure 1.4×109 atm, density 1.4 g cm−3 and average molecular weight 2 g/mol, then the temperature of the sun will be[Given R=8.4 J mol−1K−1]. Assume ideal gas behaviour. |
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Answer» If the gaseous medium of the sun has pressure 1.4×109 atm, density 1.4 g cm−3 and average molecular weight 2 g/mol, then the temperature of the sun will be |
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| 40. |
In trigonal or rhombohedral unit cell only gamma is not equal to 90 degree or all three angles alpha beta and gamma are not equal to 90 degree |
| Answer» In trigonal or rhombohedral unit cell only gamma is not equal to 90 degree or all three angles alpha beta and gamma are not equal to 90 degree | |
| 41. |
S+3/2O2→ SO3+2x Kcal ;(2) SO2+1/2 O2 → SO3+Y Kcal the heat of formation of SO2 i |
| Answer» S+3/2O2→ SO3+2x Kcal ;(2) SO2+1/2 O2 → SO3+Y Kcal the heat of formation of SO2 i | |
| 42. |
Which one of the following would produce maximum elevation in boiling point? |
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Answer» Which one of the following would produce maximum elevation in boiling point? |
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| 43. |
E_{n }=-313.6/n^2 kcal/mole.If the value of E=-34.4kcal/mole,to which value does'n' correspond |
| Answer» E_{n }=-313.6/n^2 kcal/mole.If the value of E=-34.4kcal/mole,to which value does'n' correspond | |
| 44. |
White phosphorous reacts with Sodium Hydroxide solution and disproportionates into Sodium __________ and ___________ gas. |
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Answer» White phosphorous reacts with Sodium Hydroxide solution and disproportionates into Sodium __________ and ___________ gas. |
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| 45. |
What are Binuclear Coordination Compounds?? |
| Answer» What are Binuclear Coordination Compounds?? | |
| 46. |
Detailed comparison between SN1 and SN2 reaction. Also important reaction involving SN1 and SN2. |
| Answer» Detailed comparison between SN1 and SN2 reaction. Also important reaction involving SN1 and SN2. | |
| 47. |
In the following reaction, the major product is |
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Answer» In the following reaction, the major product is |
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| 48. |
order of stability of +1 oxidation state for Al,Ga,In,T |
| Answer» order of stability of +1 oxidation state for Al,Ga,In,T | |
| 49. |
In the following reaction, A is: |
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Answer» In the following reaction, |
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| 50. |
The equilibrium constant Kp for the reaction N2 (g) + 3H2 (g) ⇋ 2NH3 (g) is: |
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Answer» The equilibrium constant Kp for the reaction N2 (g) + 3H2 (g) ⇋ 2NH3 (g) is: |
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