Which of the following statements is correct regarding the structure and properties of diamond and graphite?
| 1. | Both diamond and graphite are used as dry lubricants. |
| 2. | Diamond and graphite have a two-dimensional network. |
| 3. | Diamond is covalent, and graphite is ionic. |
| 4. | Diamond is sp³ hybridised, and graphite is sp² hybridized. |
Subtopic: Structure & Properties of Allotropes of C |
83%
Level 1: 80%+
NEET - 2022
Hints
The IUPAC name of the following complex is:
[Ag(H₂O)₂][Ag(CN)₂]
1. Diaquasilver(I) dicyanidoargentate (I)
2. Dicyanidosilver(II) diaquaargentate(II)
3. Diaquasilver(II) dicyanidoargentate(II)
4. Dicyanidosilver(I) diaquaargentate(I)
[Ag(H₂O)₂][Ag(CN)₂]
1. Diaquasilver(I) dicyanidoargentate (I)
2. Dicyanidosilver(II) diaquaargentate(II)
3. Diaquasilver(II) dicyanidoargentate(II)
4. Dicyanidosilver(I) diaquaargentate(I)
Subtopic: Introduction, Classification and Nomenclature |
63%
Level 2: 60%+
NEET - 2022
Hints
Subtopic: 2nd & 3rd Law of Thermodynamics |
86%
Level 1: 80%+
NEET - 2022
Hints
Which of the following contains 0.5 moles of a solute in one molal solution?
| 1. | 1000 g of solvent | 2. | 500 mL of solvent |
| 3. | 500 g of solvent | 4. | 100 mL of solvent |
Subtopic: Concentration Terms & Henry's Law |
74%
Level 2: 60%+
NEET - 2022
Hints
Identify the incorrect statement from the following:
| 1. | The shapes of dxy, dyz, and dzx orbitals are similar to each other; and dx2 -y2 and dz2 are similar to each other. |
| 2. | All the five 5d orbitals are different in size when compared to the respective 4d orbitals. |
| 3. | All the five 4d orbitals have shapes similar to the respective 3d orbitals. |
| 4. | In an atom, all the five 3d orbitals are equal in energy in free state. |
Subtopic: d-Block Elements- Properties & Uses |
56%
Level 3: 35%-60%
NEET - 2022
Hints
Calculate the mass of 95% pure CaCO3 that will be required to neutralize 50 mL of 0.5 M HCl solution according to the following reaction.
CaCO3(s) + 2HCl(aq) → CaCl2(aq) + CO2(g) + 2H2O(l)
[Calculate up to the second place of decimal point]
CaCO3(s) + 2HCl(aq) → CaCl2(aq) + CO2(g) + 2H2O(l)
[Calculate up to the second place of decimal point]
| 1. | 9.50 g | 2. | 1.25 g |
| 3. | 1.32 g | 4. | 3.65 g |
Subtopic: Equation Based Problem |
54%
Level 3: 35%-60%
NEET - 2022
Hints
Identify the incorrect statement among the following options:
| 1. | \(O^+_2\) ion is diamagnetic. |
| 2. | The bond orders of \(O_2^{+},O_2,O^-_2\) and \(O_2^{2-}\) are 2.5, 2, 1.5, and 1, respectively. |
| 3. | \(C_2\) molecule has four electrons in its two degenerate \(\pi \) molecular orbitals. |
| 4. | \(H^+_2 \) ion has one electron. |
Subtopic: M.O.T |
79%
Level 2: 60%+
NEET - 2022
Hints
\(\mathrm{RMgX}+\mathrm{CO}_{2} \underset{\bf\text { ether }}{\stackrel{\bf\text { dry }}{\longrightarrow}} \mathrm{Y} \xrightarrow{{\mathrm{H}_{3} \mathrm{O}^{+}}}RCOOH\)
What is Y in the above reaction?
1. (RCOO)2Mg
2. RCOO-Mg+X
3. R3CO-Mg+X
4. RCOO-X+
What is Y in the above reaction?
1. (RCOO)2Mg
2. RCOO-Mg+X
3. R3CO-Mg+X
4. RCOO-X+
Subtopic: Carboxylic Acids: Preparation & Properties |
87%
Level 1: 80%+
NEET - 2022
Hints
Given below are half-cell reactions:
\(\text{MnO}_{4}^{-}+8 \text{H}^{+}+5 \text{e}^{-} \rightarrow \text{Mn}^{2+}+4 \text{H}_{2} \text{O}, \)
\( \text{E}_{\text{Mn}^{2+}}^{\circ} / \text{MnO}_{4}^{-}=-1.510 \text{ V} \)
\( \frac{1}{2} \text{O}_{2}+2 \text{H}^{+}+2 \text{e}^{-} \rightarrow \text{H}_{2} \text{O}, \)
\( \text{E}_{\text{O}_{2} / \text{H}_{2} \text{O}}^{\circ}=+1.223 \text{ V}\)
Will the permanganate ion, \(\text{MnO}_{4}^{-}\) , liberate \(\text{O}_{2}\) from water in the presence of an acid?
1. No, because \(\text{E}_{\text {cell }}^{\circ}=-2.733 \text{ V}\)
2. Yes, because \(\text{E}_{\text {cell }}^{\circ}=+0.287 \text{ V}\)
3. No, because \(\text{E}_{\text {cell }}^{\circ}=-0.287 \text{ V}\)
4. Yes, because \(\text{E}_{\text {cell }}^{\circ}=+2.733 \text{ V}\)
\(\text{MnO}_{4}^{-}+8 \text{H}^{+}+5 \text{e}^{-} \rightarrow \text{Mn}^{2+}+4 \text{H}_{2} \text{O}, \)
\( \text{E}_{\text{Mn}^{2+}}^{\circ} / \text{MnO}_{4}^{-}=-1.510 \text{ V} \)
\( \frac{1}{2} \text{O}_{2}+2 \text{H}^{+}+2 \text{e}^{-} \rightarrow \text{H}_{2} \text{O}, \)
\( \text{E}_{\text{O}_{2} / \text{H}_{2} \text{O}}^{\circ}=+1.223 \text{ V}\)
Will the permanganate ion, \(\text{MnO}_{4}^{-}\) , liberate \(\text{O}_{2}\) from water in the presence of an acid?
1. No, because \(\text{E}_{\text {cell }}^{\circ}=-2.733 \text{ V}\)
2. Yes, because \(\text{E}_{\text {cell }}^{\circ}=+0.287 \text{ V}\)
3. No, because \(\text{E}_{\text {cell }}^{\circ}=-0.287 \text{ V}\)
4. Yes, because \(\text{E}_{\text {cell }}^{\circ}=+2.733 \text{ V}\)
Subtopic: Electrode & Electrode Potential |
Level 3: 35%-60%
NEET - 2022
Hints
The given graph is a representation of the kinetics of a reaction.
The y and x axes for zero and first-order reactions, respectively are:
The y and x axes for zero and first-order reactions, respectively are:
| 1. | zero order (y=rate and x=concentration), first order (y=rate and x=t1/2) |
| 2. | zero order (y=concentration and x=time), first order (y=t1/2 and x = concentration) |
| 3. | zero order (y=concentration and x= time), first order (y=rate constant and x= concentration) |
| 4. | zero order (y=rate and x=concentration), first order (y=t1/2 and x = concentration) |
Subtopic: Order, Molecularity and Mechanism |
62%
Level 2: 60%+
NEET - 2022
Hints
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