NEET WEEKLY TEST CHEMISTRY (22.11.2025)

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Welcome to your NEET WEEKLY TEST CHEMISTRY (22.11.2025)

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IMPORTANT INSTRUCTIONS

1. The test is of 90 minutes duration and Test Booklet contains 45 questions. Each question carried 4 marks for each correct response, the candidate will get 4 marks. For each incorrect response, one mark will be deducted from the total scores.
2. Use of Cell phone/Electronics gadgets/Calculator etc. are not allowed.

CHEMISTRY

1. Which of the following complexes will show optical isomerism but not geometrical isomerism?

1) [Co(en)₂Cl₂]⁺
2) [Co(en)₃]³⁺
3) [Pt(en)₂Cl₂]
4) [Cr(H₂O)₂(en)₂]³⁺

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2. Which complex has the highest number of unpaired electrons?

1) [Mn(H₂O)₆]²⁺
2) [Fe(CN)₆]⁴⁻
3) [CoF₆]³⁻
4) [Cr(NH₃)₆]²⁺

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3. The spin-only magnetic moment of [Fe(H₂O)₆]²⁺ is:

1) 2.83 BM
2) 4.90 BM
3) 5.92 BM
4) 1.73 BM

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4. Which complex will NOT show optical isomerism?

1) [Co(en)₃] ³⁺
2) [Pt(NH₃)₂Cl₂]
3) [Cr(en)₂Cl₂] ⁺
4) [Co(NH₃)₄Cl₂]⁺d) 5g

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5. Square planar geometry is shown by?

1) [NiCl₄] ²⁻
2) [Ni(CN)₄]²⁻
3) [CuCl₄] ²⁻
4) [Zn (NH₃)₄]²⁺

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6. The correct name of [Fe(CO)₄(NO)]⁺ is:

1) Tetracarbonylnitrosyliron (I) ion
2) Tetracarbonylnitrosyliron (II) ion
3) Tetracarbonylnitrosyliron (0) ion
4) Tetracarbonylnitritoiron (I) ionDeselect Answer

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7. The correct name of K[Cr(SCN)₄(H₂O)₂] is:

1) Potassiumdiaquatetrathiocyanato chromate(IV)
2) Potassium diaquatetrathiocyanatechromium (III)
3) Potassium diaquatetraisothiocyanato-S-chromate(III)
4) Potassium diaquatetrathiocyanato-S-chromate(III)Deselect Answer

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8. Which complex is paramagnetic but inner-orbital (d²sp³)?

1) [Fe(CN)₆]⁴⁻
2) [CoF₆]³⁻
3) [Cr(CN)₆]⁴⁻
4) [Fe(H₂O)₆]²⁺

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9. The electronic configuration t₂g⁴ eg² corresponds to:

1) High-spin d⁵
2) High-spin d⁶
3) Low-spin d⁶
4) High-spin d⁷

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10. Formula of Sodium hexacyanomanganate(III):

1) Na₃[Mn(CN)₆]
2) Na₂[Mn(CN)₆]
3) Na₄[Mn(CN)₆]
4) Na₅[Mn(CN)₆]

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11. The incorrect statement about Crystal Field Splitting in tetrahedral complexes is?

1) non-axial orbitals are repelled more by ligands
2) energy of t₂ > e
3) t₂ orbitals lie at – 0.4 Δ_{_t}4) CFS is measured in terms of Δ_tDeselect Answer

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12. The oxidation state of Cr in CrO₅ is

1) +10
2) -2
3) +6
4) +12

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13. Which of the following will be formed when lead storage battery is charged?

1) Sulphuric acid is formed
2) Sulphuric acid is consumed
3) Hydrochloric acid is formed
4) Lead is formedDeselect Answer

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14. How many hours does it take to reduce 3 mol of Fe³⁺ to Fe²⁺ with 2.0 A current?

1) 36 hrs
2) 40hrs
3) 42hrs
4) 45 hrs

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15. Which of the following is the strongest oxidizing agent?

1) Cu²⁺/Cu
2) Ag⁺/Ag
3) Ni²⁺/Ni
4) Fe³⁺/Fe²⁺

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16. How many moles of electrons are required to Reduce 1 mol of MnO₄^2- to Mn²⁺

1) 4
2) 5
3) 6
4) 7

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17. How many moles of electron are Required to Produce 10g of Mg from MgO

1) 0.82
2) 1.2
3) 1.1
4) 0.86

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18. A Daniel cell contains 0.1M ZnSO₄ solution and 0.01 M CuSO₄ solution at its electrodes. The emf of the cell is

Given: E ֯ Cu²⁺/Cu = 0.34V, E ֯ Zn²⁺/Zn = -0.76 V

1) 1.07 V
2) 1.06 V
3) 1.26 V
4) 1.54 V

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19. For the reduction of silver ions with nickel metal, the standard cell potential was found to be +0.36V. The value of standard Gibbs energy will be (F = 96500 C/Mol)

1) -66.50 KJ
2) -60.32 KJ
3) -69.48 KJ
4) -67.42 KJ

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20. Which of the following will have the highest molar conductance at infinite dilution?

1) NaCl
2) KCl
3) HCl
4) KNO₃

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21. The equivalent conductance of 1/32 solution of a weak monobasic acid is 6.0 mho cm²and at infinite dilution is 600 mho cm². The dissociation constant of this acid is

1) 3.312 x 10⁵2) 3.12 x 10^-63) 1.34 x 10^-54) 3.33 x 10 ⁶

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22. How many coulombs of electricity are required for oxidation of 1mol of Zn to Zn²⁺

1) 1.65 x 10² C
2) 1.93 x 10⁵ C
3) 96500 C
4) 1.2 X 10⁴ C

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23. The specific conductance of 0.1M NaCl solution is 1.06 X 10^-2Ohm/cm. Its molar conductance in ohm/cm²/mol is

1) 1.06 x 10²2) 1.2 x 10³3) 5.2 x 10^-24) 0.1 x 10³

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24. The correct order of N – compounds in its decreasing order of oxidation states is

1) HNO₃, NH₄Cl, NO, N₂
2) HNO₃, NO, NH₄Cl, N₂
3) HNO₃, NO, N₂, NH₄Cl
4) NH₄Cl, N₂, NO, HNO₃

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25. Maximum bond angle at nitrogen is present in which of the following?

1) NO₂2) NO₂^–3) NO₂⁺
4) NO₃^–

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26. In solid state, PCl₅ is a

1) Covalent solid
2) Octahedral structure
3) Ionic solid with [PCl₆] ⁺ octahedral and [PCl₄] ⁺ tetrahedral
4) Ionic solid with [PCl₄] ⁺ tetrahedral and [PCl₆]^– octahedral

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27. Which is the correct statement for the given acids?

1) Phosphonic acid is a monoprotic acid while phosphonic acid is diprotic acid
2) Phosphonic acid is a diprotic acod while phosphonic acid is monoprotic acid
3) Both are triprotic acids
4) Both are diprotic acids

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28. Which of the following statements is not valid for oxoacids of phosphorus?

1) Orthophosphoric acid is used in the manufacture of triple superphosphate
2) Hypophosphorus acid is a diprotic acid
3) All oxoacids contain tetrahedral four coordinated phosphorus
4) All oxoacids contain at least P = O unit and one P-OH group

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29. Which of the following structure is similar to graphite?

1) BN
2) B
3) B₄C
4) B₂H₆

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30. The basic structural unit of silicates is

1) SiO^–2) SiO₄^4-3) SiO₃^2-
4) SiO₄^2-

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31. The species, having bond angles of 120^o is

1) PH₃2) ClF₃3) NCl₃4) BCl₃

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32. The correct order of atomic radii in group 13 elements is

1) B < Ga < Al < Tl < In
2) B < Al < Ga < In < Tl
3) B < Al < In < Ga < Tl
4) B < Ga < Al < In < Tl

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33. (CH₃)₂SiCl₂undergoes hydrolysis but (CH₃)₂CCl₂ does not. This is because

1) d-orbitals are present in valence shell of Si but not in C
2) Only 3p-orbital is involved in C
3) Silicon is more acidic
4) Si-Cl bond is more polar than C-Cl bond

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34. Which of the following is not sp² hybridised?

1) Graphite
2) Graphene
3) Fullerene
4) Dry Ice

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35. Which of the following compound would not react with Lucas reagent at room temperature?

1) CH₂=CHCH₂OH
2) C₆H₅CH₂OH
3) CH₃CH₂CH₂OH
4) (CH₃)₃COH

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36. Which of the following will be dehydrated most readily in alkaline medium?

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The product Y is

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38. Among the following the most stable compound is

1) cis-1,2-cyclohexanediol
2) trans-1,2-cyclohexanediol
3) cis-1,3-cyclohexenediol
4) trans-1,3-cyclohexanediolDeselect Answer

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39. Which of the following alcohols will not give iodoform test?

1) Acetophenone
2) Propan-1-ol
3) Butan-2-ol
4) Ethanol

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40. Increasing order of acid strength among p-methoxyphenol, p-methylphenol and p-nitrophenol is

1) p-nitrophenol, p-methoxyphenol, p-methylphenol
2) p-methylphenol, p-methoxyphenol, p-nitrophenol
3) p-nitrophenol, p-methylphenol, p-methoxyphenol
4) p-methoxyphenol, p-methylphenol, p-nitrophenol.Deselect Answer

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41. An unknown alcohol is treated with the “Lucas reagent” to determine whether the alcohol is primary, secondary or tertiary. Which alcohol reacts fastest and by what mechanism?

1) Secondary alcohol by SN1
2) Tertiary alcohol by SN1
3) Secondary alcohol by SN2
4) Tertiary alcohol by SN2

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42. Which of the following will not be soluble in sodium hydrogen carbonate?

1) 2,4,6-Trinitrophenol
2) Benzoic acid
3) o-Nitrophenol
4) Benzenesulphonic acid

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1) (CH₃)₂CH-O-CH₂CH_₃2) CH₃(CH₂)₄-O-CH₃
3) CH₃CH₂CH(CH₃)-O- CH₂CH₃
4) CH₃-(CH₂)₃-O- CH₂CH₃Deselect Answer

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44. The major product formed in the following reaction is:
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45. A tertiary alcohol is obtained

1) by the reaction of an aldehyde and a Grignard reagent
2) by the reaction of a ketone and a Grignard reagent
3) when an aldehyde is reduced with LiAlH₄
4) when a ketone is reduced with LiAlH₄.Deselect Answer

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