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What fraction of Fe exists as Fe(III) in Fe0.96O?
(Consider Fe0.96 to be made up of Fe(II) and Fe(III) only)
1.  \(\dfrac{1}{12}\)
2.  \(0.08\)
3.  \(\dfrac{1}{16}\)
4.  \(\dfrac{1}{20}\)
Subtopic:  Moles, Atoms & Electrons |
Level 3: 35%-60%
NEET - 2022
Hints
Select the correct option based on statements below:
Assertion (A): The metal carbon bond in metal carbonyls possesses both \(\sigma\) and \(\pi\) character.
Reason (R): The ligand to metal bond is a \(\pi\) bond and metal to ligand bond is a \(\sigma\) bond.
 
1. Both (A) and (R) are True and (R) is the correct explanation of (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is True but (R) is False.
4. (A) is False but (R) is True.
Subtopic:  Organometallic Complexes & their Uses |
 62%
Level 2: 60%+
NEET - 2022
Hints
Which one of the following reaction sequences is the incorrect method to prepare phenol? 
 
1. Aniline, NaNO2 + HCl, H2O, heating
2. Cumene, O2, H3O+
3.
4.
Subtopic:  Phenols: Preparation & Properties |
 68%
Level 2: 60%+
NEET - 2022
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A vessel contains 3.2 g of dioxygen gas at STP (273.15 K and 1 atm pressure). The gas is now transferred to another vessel at a constant temperature, where pressure becomes one-third of the original pressure. The volume of the new vessel in L is:
(Given - molar volume at STP is 22.4 L)
1.  6.72
2.  2.24
3.  22.4
4.  67.2
Subtopic:  Gas Laws |
 50%
Level 3: 35%-60%
NEET - 2022
Hints
Match List-I with List-II :
List-I List-II
(a) Biochemical oxygen demand (i) Oxidising mixture
(b) Photochemical smog (ii) Polar stratospheric cloud
(c) Classical smog (iii) Organic matter in water
(d) Ozone layer depletion (iv) Reducing mixture
Choose the correct answer from the options given below:
(a) (b) (c) (d)
1. (i) (iv) (ii) (iii)
2. (iii) (iv) (i) (ii)
3. (iii) (i) (iv) (ii)
4. (iv) (iii) (ii) (i)
Subtopic:  Air Pollution - Smog | Water Pollution - Biological Oxygen Demand |
 69%
Level 2: 60%+
NEET - 2022
Hints
The products A and B in the following reaction sequence are :
 
1.
2.
3.
4.
Subtopic:  Carboxylic Acids: Preparation & Properties | Acid Derivatives - Preparation, Properties & Uses |
 61%
Level 2: 60%+
NEET - 2022
Hints
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Given below are two statements:
Statement I: Cr2+ is oxidising agent and Mn3+ is a reducing agent in nature.
Statement II: Sc3+ compounds are repelled by the applied magnetic field.
In light of the above statements, choose the most appropriate answer from the options given below:
1. Both I and II are correct.
2. Both I and II are incorrect.
3. I is correct but II is incorrect.
4. I is incorrect but II is correct.
Subtopic:  d-Block Elements- Properties & Uses |
 55%
Level 3: 35%-60%
NEET - 2022
Hints
Kp for the following reaction is 3.0 at 1000 K.
\(\mathrm{CO_{2}(g)\,+\,C(s)\rightarrow \,2CO(g)}\)
The value of Kc for the reaction at the same temperature is: 
(Given: R = 0.083 L bar K–1 mol–1)
1. 0.36 2. 3.6 × 10–2
3. 3.6 × 10–3 4. 3.6
Subtopic:  Introduction To Equilibrium |
 82%
Level 1: 80%+
NEET - 2022
Hints
Standard electrode potential for the cell with cell reaction
Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s)
is 1.1 V. Calculate the standard Gibbs energy change for the cell reaction. (Given F = 96487 C mol–1)
1. –200.27 kJ mol–1 2. –212.27 kJ mol–1
3. –212.27 J mol–1 4. –200.27 J mol–1
Subtopic:  Relation between Emf, G, Kc & pH |
 82%
Level 1: 80%+
NEET - 2022
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The most stable carbocation among the following is:
1. 2.
3. 4.
Subtopic:  Reaction Intermediates ; Preparation & Properties |
 78%
Level 2: 60%+
NEET - 2022
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