MPSC PYQ

Graphite

Graphite is a Science & Technology concept from the MPSC syllabus, tested in 2 past MPSC questions (2025). Below are those real questions with their correct answers and explanations, plus the concepts worth being comfortable with first.

Real questions
2
Years tested
1 · 2025–2025
In context
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Real questions that test this

Carbon compounds are broadly classified into two main categories : 1. Organic compounds : These contain carbon and hydrogen and may also include other elements like oxygen, nitrogen, sulfur etc. They include hydrocarbons (such as methane, ethane, propane), alcohols, acids and polymers (like plastics, rubber). Organic compounds are essential in biological systems, forming the basis of molecules like proteins, carbohydrates, lipids and nucleic acids (DNA and RNA). They are also used widely in industries for example, in the manufacture of fuels, dyes, medicines, pesticides and plastics. 2. Inorganic compounds : These include compounds like Carbon dioxide (CO2), Carbon Monoxide (CO), carbonates (such as calcium carbonate in limestone) and bicarbonates. These compounds are vital in geological and environmental processes, such as the carbon cycle, which maintains the balance of carbon in the eco-system. Carbon compounds exhibit various properties, most organic compounds have low melting and boiling points, are generally flammable and more soluble in organic solvents rather than water. This makes them useful as fuels and industrial solvents. Their diversity and reactivity make them a central part of the field of chemistry, particularly in synthetic and pharmaceutical industries.

खालीलपैकी कोणते विधान ग्रॅफाइट बाबत सत्य आहे ? Which of the following statements is true about graphite ?

1)हा सर्वात कठीण नैसर्गिक पदार्थ आहे. / It is the hardest natural substance.
2)तो नरम आणि गुळगुळीत आहे आणि विद्युत वाहित करतो. / It is soft and slippery and conducts electricity.✓ Correct
3)तो फक्त हिऱ्याची छेदन करण्यासाठी वापरला जातो. / It is used only in diamond cutting.
4)तो कार्बनचा कृत्रिम रूप आहे. / It is a synthetic form of carbon.

Graphite is an allotrope of carbon that is soft, slippery, and an excellent conductor of electricity due to the presence of free electrons.

Carbon compounds are broadly classified into two main categories : 1. Organic compounds : These contain carbon and hydrogen and may also include other elements like oxygen, nitrogen, sulfur etc. They include hydrocarbons (such as methane, ethane, propane), alcohols, acids and polymers (like plastics, rubber). Organic compounds are essential in biological systems, forming the basis of molecules like proteins, carbohydrates, lipids and nucleic acids (DNA and RNA). They are also used widely in industries for example, in the manufacture of fuels, dyes, medicines, pesticides and plastics. 2. Inorganic compounds : These include compounds like Carbon dioxide (CO2), Carbon Monoxide (CO), carbonates (such as calcium carbonate in limestone) and bicarbonates. These compounds are vital in geological and environmental processes, such as the carbon cycle, which maintains the balance of carbon in the eco-system. Carbon compounds exhibit various properties, most organic compounds have low melting and boiling points, are generally flammable and more soluble in organic solvents rather than water. This makes them useful as fuels and industrial solvents. Their diversity and reactivity make them a central part of the field of chemistry, particularly in synthetic and pharmaceutical industries.

खालीलपैकी कोणते कार्बनचे अपरूप (allotrope) नाही ? Which of the following is not an allotrope of carbon ?

1)ग्रॅफाइट / Graphite
2)हिरा / Diamond
3)कार्बन डायऑक्साइड / Carbon dioxide✓ Correct
4)फुलरीन / Fullerene

Allotropes are different forms of the same element. Graphite, diamond and fullerene are all pure carbon, while carbon dioxide is a compound of carbon and oxygen, so it is not an allotrope.

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