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- Answered
- Review
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Question 1 of 57
1. Question
Which one of the following statements is FALSE?
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Question 2 of 57
2. Question
Which one of the following sets of quantum numbers represents the highest energy level in an atom?
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Question 3 of 57
3. Question
When O2 is converted into O2+; __________
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Question 4 of 57
4. Question
In chromite ore, the oxidation number of iron and chromium are respectively _______
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Question 5 of 57
5. Question
The number of naturally occurring p-block elements that are diamagnetic is ______
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Question 6 of 57
6. Question
If the energies of the two photons are in the ratio 3 : 2, their wavelengths will be in the ratio of ______
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Question 7 of 57
7. Question
Which one of these is NOT TRUE for benzene?
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Question 8 of 57
8. Question
Generally, the first ionization energy increases along a period. But there are some exceptions. The one which is NOT an exception is _____
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Question 9 of 57
9. Question
Increasing order of carbon-carbon bond length for the following is _____
- C2H4
- C2H2
- C6H6
- C2H6
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Question 10 of 57
10. Question
A mixture of CaCl2 and NaCl weighing 4.44 g is treated with sodium carbonate solution to precipitate all the calcium ions as calcium carbonate. The calcium carbonate so obtained is heated strongly to get 0.56 g of CaO. The percentage of NaCl in the mixture is ______ (Atomic mass of Ca = 40)
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Question 11 of 57
11. Question
50 cm3 of 0.2 N HCl is titrated against 0.1 N NaOH solution. The titration was discontinued after adding 50 cm3 of NaOH. The remaining titration is completed by adding 0.5 N KOH. The volume of KOH required for completing the titration is _____
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Question 12 of 57
12. Question
The rms velocity of hydrogen is √7 times the rms velocity of nitrogen. If T is the temperature of the gas, which of the following is true?
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Question 13 of 57
13. Question
25 g of each of the following gases are taken at 27 oC and 600 mm pressure. Which of these will have the least volume?
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Question 14 of 57
14. Question
The amount of heat evolved when 500 cm3 of 0.1 M HCl is mixed with 200 cm3 of 0.2 M NaOH is _____
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Question 15 of 57
15. Question
The enthalpy of vaporization of benzene is +35.3 kJ/mol at its boiling point of 80 o The entropy change in the transition of vapour to liquid at its boiling point is ______ (in J mol-1 K-1)
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Question 16 of 57
16. Question
Based on the first law of thermodynamics, which one of the following is correct?
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Question 17 of 57
17. Question
Consider the following gaseious equilibria with equilibrium constants K1 and K2
SO2(g) + ½ O2(g) ⇌ SO2(g)
2SO3(g) ⇌ 2SO2(g) + O2(g)The equilibrium constants are related as _____
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Question 18 of 57
18. Question
During the adsorption of Krypton on activated charcoal at low temperature; _________
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Question 19 of 57
19. Question
For the reversible reaction, A(s) + B(g) ⇌ C(g) + D(g) ∆Go = -350 kJ, which one of the following statements is true?
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Question 20 of 57
20. Question
The compound which gives turbidity immediately with Lucas reagent at room temperature is ______
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Question 21 of 57
21. Question
Ethyl benzene CANNOT be prepared by ______
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Question 22 of 57
22. Question
2 g of organic compound on Kjeldahlization liberates ammonia which consumes 30 cm3 of 1 N HCl. The percentage of nitrogen in the organic compound is _____
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Question 23 of 57
23. Question
Carbon cannot reduce Fe2O3 to Fe at a temperature below 983 K because _____
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Question 24 of 57
24. Question
The yellow precipitate formed during the chromyl chloride test is chemically _______
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Question 25 of 57
25. Question
One gram of silver gets distributed between 10 cm3 of molten zinc and 100 cm3 of molten lead at 800o The percentage of silver left in the lead layer is approximately _______
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Question 26 of 57
26. Question
Which one of the following is TRUE?
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Question 27 of 57
27. Question
In Ramsay and Rayleigh’s isolation of noble gases from air, the nitrogen of the air is finally converted into ______
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Question 28 of 57
28. Question
The spin only magnetic moment of Fe+2 ion (in BM) is approximately ______
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Question 29 of 57
29. Question
The IUPAC name of the complex [Co(NH3)4 Cl2]Cl is ________
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Question 30 of 57
30. Question
Excess of silver nitrate solution is added to 100 ml of 0.01 M Pentaaqua chloro chromium (III) chloride solution. The mass of silver chloride obtained in grams is _______ (Atomic mass of silver is 108).
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Question 31 of 57
31. Question
The following data were obtained during the first order decomposition of 2A(g) → B(g) + C(s) at a constant volume and at a particular temperature.
Sr.No Time Total pressure in Pascal 1 At the end of 10 min 300 2 After completion 200 The rate constant in min-1 is _________
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Question 32 of 57
32. Question
The time required for 100% completion of a zero order reaction is _____
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Question 33 of 57
33. Question
The activation energy of a reaction at a given temperature is found to be 2.303 RT J mol-1. The ratio of rate constant to the Arrhenius factor is _______
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Question 34 of 57
34. Question
pH value of which one of the following is NOT equal to one?
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Question 35 of 57
35. Question
A buffer solution contains 0.1 mole of sodium acetate dissolved in 1000 cm3 of 0.1 M acetic acid. To the above buffer solution, 0.1 mole of sodium acetate is further added and dissolved. The pH of the resulting buffer is ________
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Question 36 of 57
36. Question
H2S is passed into one dm3 of a solution containing 0.1 mole of Zn2+ and 0.01 mole of Cu2+ till the sulphide ion concentration reaches 8.1 × 10-19 Which one of the following statements is true? (Ksp of ZnS and CuS are 3 × 10-22 and 8 × 10-36 respectively)
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Question 37 of 57
37. Question
E1, E2 and E3 are the emfs of the following three galvanic cells respectively :
- Zn (s) ǀ Zn2+ (0.1 M) ǀǀ Cu2+ (1M) ǀ Cu (s)
- Zn (s) ǀ Zn2+ (1 M) ǀǀ Cu2+ (1M) ǀ Cu (s)
- Zn (s) ǀ Zn2+ (1 M) ǀǀ Cu2+ (0.1M) ǀ Cu (s)
Which one of the following is true?
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Question 38 of 57
38. Question
0.023 g of sodium metal is reacted with 100 cm3 of water. The pH of the resulting solution is ______
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Question 39 of 57
39. Question
The standard emf of a galvanic cell involving 2 moles of electrons in its redox reaction is 0.59 V. The equilibrium constant for the redox reaction of the cell is _______
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Question 40 of 57
40. Question
65 coulombs of electric current is passed through fused anhydrous MgCl2. The magnesium metal thus obtained is completely converted into a Grignard reagent. The number of moles of Grignard reagent obtained is _______
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Question 41 of 57
41. Question
The empirical formula of a non-electrolyte is CH2O. A solution containing 3 g of the compound exerts the same osmotic pressure as that of 0.05 M glucose solution. The molecular formula of the compound is _______
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Question 42 of 57
42. Question
Which one of the following is a covalent crystal?
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Question 43 of 57
43. Question
Which one of the following DOES NOT involve coagulation?
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Question 44 of 57
44. Question
A solution of two liquids boils at a temperature more than the boiling point of either of them. Hence, the binary solution shows ______
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Question 45 of 57
45. Question
Which one of the nitrogen atoms in H2N – NH – CO – NH2 is the most nucleophilic ?
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Question 46 of 57
46. Question
The maximum number of possible optical isomers in 1-bromo-2-methyl cyclobutane is ______
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Question 47 of 57
47. Question
Which one of the following is the most energetic conformation of cyclohexane?
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Question 48 of 57
48. Question
Which one of the following is an intermediate in the reaction of benzene with CH3Cl in the presence of anhydrous AlCl3?
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Question 49 of 57
49. Question
Which one of the following is NOT TRUE for the hydrolysis of t-butyl bromide with aqueous NaOH?
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Question 50 of 57
50. Question
Following is the substitution reaction in which -CN replaces -Cl.
R-Cl + KCN(alco) → R-CN + KCl
To obtain propanenitrile, R-Cl should be _______
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Question 51 of 57
51. Question
The conversion of m-nitrophenol to resorcinol involves respectively ________
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Question 52 of 57
52. Question
Formic acid is a stronger acid than acetic acid. This can be explained using ______
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Question 53 of 57
53. Question
The reagent with which both acetaldehyde and acetone react is _______
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Question 54 of 57
54. Question
Which of the following gives an aldehyde on dry distillation?
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Question 55 of 57
55. Question
α-maltose consists of _______
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Question 56 of 57
56. Question
Which one of the following DOES NOT correctly match with each other?
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Question 57 of 57
57. Question
In an alkaline medium, glycine predominantly exists as/in a/an _______