Chemistry of Graphite PYQ MCQs

Graphite MCQs
NEET, IIT-JEE, IIT-JAM, GATE, CSIR-NET

JEE Advanced 2018, 2022 Pattern

Q1: In Acheson process, the intermediate is SiC. The reaction is:

1. SiO₂ + C → Si + CO
2. SiO₂ + 3C → SiC + 2CO
3. SiC + C → Si + CO
4. SiO₂ + 2C → Si + 2CO

Correct Answer: B

Explanation: SiO₂ + 3C → SiC + 2CO (first step), then SiC dissociates at ~3000°C to give graphite.

NEET 2025 HOT

Q2: The hybridisation of carbon in graphite is:

1. sp
2. sp²
3. sp³
4. sp³d

Correct Answer: B. sp²

JEE Main 2024 Repeated

Q3: Graphite conducts electricity due to:

1. Presence of free electrons
2. Delocalised π-electrons
3. Ionic bonding
4. Strong van der Waals forces

Correct Answer: B. Delocalised π-electrons

JEE Advanced Level

Q4: Interlayer distance in graphite is approximately:

1. 1.42 Å
2. 1.54 Å
3. 3.35 Å
4. 2.46 Å

Correct Answer: C. 3.35 Å

CSIR-NET / GATE

Q5: The bronze-coloured graphite intercalation compound with potassium is:

1. KC₈
2. KC₂₄
3. KC₆₄
4. KC₃₆

Correct Answer: A. KC₈

NEET Classic

Q6: Pencil lead is made of:

1. Lead sulphide
2. Graphite + Clay
3. Charcoal
4. Carbon black

Correct Answer: B. Graphite + Clay

JEE Main 2025 HOT

Q7: Graphite is thermodynamically ----- stable than diamond at room temperature.

1. Less
2. More
3. Equally
4. Cannot be predicted

Correct Answer: B. More

GATE Chemistry

Q8: Oxidation of graphite with conc. HNO₃ + KClO₃ yields:

1. Graphitic acid
2. Graphene
3. Fullerene
4. Carbon nanotubes

Correct Answer: A. Graphitic acid

JEE Advanced Assertion-Reason Type

Q9: Assertion: Graphite is slippery in nature.
Reason: Layers are held by weak van der Waals forces.

1. Both A and R true, R is correct explanation
2. Both true, R not explanation
3. A true, R false
4. A false, R true

Correct Answer: A. Both A and R true, R is correct explanation

NEET 2024 Type

Q10: Graphite is used as moderator in nuclear reactor because:

1. It has high melting point
2. It slows down fast neutrons
3. It is a good conductor
4. It is soft

Correct Answer: B. It slows down fast neutrons

JEE Advanced Numerical Value

Q11: Number of carbon atoms directly bonded to one carbon atom in a graphite layer is:

1. 2
2. 3
3. 4
4. 5

Correct Answer: B. 3

CSIR-NET Previous Year

Q12: Graphite fluoride (CF_x) is formed when graphite reacts with:

1. Oxygen
2. Chlorine
3. Fluorine
4. Nitrogen

Correct Answer: C. Fluorine

JEE Main 2023 Shift

Q13: C–C bond length in the same plane of graphite is:

1. 1.42 Å
2. 1.54 Å
3. 3.35 Å
4. 1.34 Å

Correct Answer: A. 1.42 Å

NEET Favourite

Q14: Graphite is a good conductor along the sheet but insulator perpendicular to sheet because:

1. Delocalised electrons move only in plane
2. Layers are tightly bound
3. It has sp³ hybridisation
4. C–C bonds are weak

Correct Answer: A. Delocalised electrons move only in plane

GATE Previous Year

Q15: The density of graphite is approximately:

1. 1.5 g/cm³
2. 2.26 g/cm³
3. 3.51 g/cm³
4. 2.0 g/cm³

Correct Answer: B. 2.26 g/cm³

JEE Main

Q16: Graphite burns in oxygen at 700°C to form:

1. CO
2. CO₂
3. C₆₀
4. CO + CO₂

Correct Answer: B. CO₂

NEET

Q17: Single layer of graphite is called:

1. Fullerene
2. Graphene
3. Diamondoid
4. Nanotube

Correct Answer: B

JEE Advanced

Q18: Coordination number of carbon in graphite is:

1. 3
2. 4
3. 6
4. 8

Correct Answer: A. 3

CSIR-NET

Q19: Graphite is anisotropic with respect to:

1. Electrical conductivity
Hardness
2. Thermal expansion
3. All of these

Correct Answer: D. All of these

JEE Main

Q20: Graphite is used in Li-ion battery as:

1. Cathode
2. Anode
3. Electrolyte
4. Separator

Correct Answer: B. Anode

NEET

Q21: Which is the hardest naturally occurring substance?

1. Graphite
2. Diamond
3. Fullerene
4. Graphene

Correct Answer: B. Diamond

GATE

Q22: Graphite has ----- structure.

1. Hexagonal layered
2. Cubic
3. Tetragonal
4. Orthorhombic

Correct Answer: A. Hexagonal layered

JEE Advanced

Q23: In graphite, the fourth electron of carbon is present in:

1. s-orbital
2. p-orbital (π-bond)
3. sp² orbital
4. sp³ orbital

Correct Answer: B. p-orbital (π-bond)

NEET 2025 Hot

Q24: Graphite is a ----- lubricant.

1. Wet
2. Dry
3. Solid
4. Both B & C

Correct Answer: D. Both B & C

JEE Main Final

Q25: Graphite is soft because:

1. Layers can slide due to weak forces
2. It has low density
3. It is amorphous
4. It has free electrons

Correct Answer: A. Layers can slide due to weak forces

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