General Studies: Chemistry Carbon Mock Test – Free Online Practice

General Studies: Chemistry Carbon ke liye free mock test: 340 questions, timer, negative marking aur explanation ke saath. Koi login nahi, koi payment nahi — turant shuru karein.

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Practice Questions (30 of 340)

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1. What is the general formula for the 'Alkane' series?
   एल्केन (Alkane) श्रेणी का सामान्य रासायनिक सूत्र क्या है?
   (A) CnH2n

   (B) CnH2n+2

   (C) CnH2n-2

   (D) CnHn
   ✅ Answer & Explanation

   Sahi jawab: B) CnH2n+2

   Explanation: Alkanes saturated hydrocarbons hote hain jisme carbon-carbon ke beech single covalent bond hota hai aur inka general formula CnH2n+2 hota hai.
2. Which gas is primarily known as 'Marsh Gas' because it is found in swampy areas?
   दलदली क्षेत्रों में पाए जाने के कारण किस गैस को 'मार्श गैस' कहा जाता है?
   (A) Ethane

   (B) Methane

   (C) Propane

   (D) Butane
   ✅ Answer & Explanation

   Sahi jawab: B) Methane

   Explanation: Methane (CH4) daladali ilaqon me organic matter ke anaerobic breakdown se banti hai, isliye ise Marsh Gas kehte hain.
3. Which property of Carbon allows it to form long chains and rings?
   कार्बन का कौन सा गुण उसे लंबी श्रृंखलाएं और वलय बनाने की क्षमता देता है?
   (A) Isomerism

   (B) Catenation

   (C) Tetravalency

   (D) Allotropy
   ✅ Answer & Explanation

   Sahi jawab: B) Catenation

   Explanation: Catenation carbon ka unique self-linking property hai, jisse wo covalent bonds ke zariye lambi chains aur stable rings banata hai.
4. What is the bond angle in a 'Methane' molecule ($CH_4$)?
   मीथेन ($CH_4$) अणु में बंध कोण (Bond Angle) कितना होता है?
   (A) 90°

   (B) 120°

   (C) 109.5°

   (D) 180°
   ✅ Answer & Explanation

   Sahi jawab: C) 109.5°

   Explanation: Methane me central carbon sp3 hybridized hota hai, jisse iska symmetrical tetrahedral structure banta hai aur bond angle 109.5° (109°28') hota hai.
5. Which of the following is an 'Unsaturated' hydrocarbon?
   निम्नलिखित में से कौन सा एक 'असंतृप्त' हाइड्रोकार्बन है?
   (A) Methane

   (B) Ethane

   (C) Ethene

   (D) Propane
   ✅ Answer & Explanation

   Sahi jawab: C) Ethene

   Explanation: Ethene (C2H4) me carbon-carbon ke beech double bond hota hai, isliye ye ek unsaturated hydrocarbon hai.
6. What is the IUPAC name of 'Acetylene' gas?
   एसिटिलीन गैस का IUPAC नाम क्या है?
   (A) Ethane

   (B) Ethene

   (C) Ethyne

   (D) Propyne
   ✅ Answer & Explanation

   Sahi jawab: C) Ethyne

   Explanation: Acetylene ka formula C2H2 hota hai aur IUPAC system me carbon-carbon triple bond hone ke kaaran ise Ethyne kehte hain.
7. Compounds with the same molecular formula but different 'Structures' are called:
   समान आणविक सूत्र लेकिन भिन्न संरचना वाले यौगिक क्या कहलाते हैं?
   (A) Isotopes

   (B) Isomers

   (C) Allotropes

   (D) Homologs
   ✅ Answer & Explanation

   Sahi jawab: B) Isomers

   Explanation: Jin compounds ka molecular formula same ho par structural arrangement alag ho, unhe Isomers kehte hain.
8. Which gas is used for the 'Artificial Ripening' of green fruits?
   कच्चे फलों को कृत्रिम रूप से पकाने के लिए किस गैस का उपयोग किया जाता है?
   (A) Methane

   (B) Ethylene (Ethene)

   (C) Ethane

   (D) Carbon Dioxide
   ✅ Answer & Explanation

   Sahi jawab: B) Ethylene (Ethene)

   Explanation: Ethylene ek plant hormone hai jo natural ripening trigger karta hai; commercial setups me bhi fruits pakane ke liye ethylene gas use hoti hai.
9. What is the 'Main Constituent' of Natural Gas?
   प्राकृतिक गैस का मुख्य घटक क्या है?
   (A) Methane (approx 95%)

   (B) Butane

   (C) Propane

   (D) Ethane
   ✅ Answer & Explanation

   Sahi jawab: A) Methane (approx 95%)

   Explanation: Natural gas aur CNG ka primary component Methane (CH4) hota hai, jo lagbhag 85-95% tak hota hai.
10. Which type of 'Isomerism' is shown by Butane and Isobutane?
    ब्यूटेन और आइसोब्यूटेन किस प्रकार की समावयवता प्रदर्शित करते हैं?
    (A) Position Isomerism

    (B) Chain Isomerism

    (C) Functional Isomerism

    (D) Metamerism
    ✅ Answer & Explanation

    Sahi jawab: B) Chain Isomerism

    Explanation: Butane straight carbon chain hai jabki Isobutane branched chain hai, isliye ye dono Chain Isomers hain.
11. What is the general formula for the 'Alkyne' series?
    एल्काइन श्रेणी का सामान्य सूत्र क्या है?
    (A) CnH2n

    (B) CnH2n+2

    (C) CnH2n-2

    (D) CnHn
    ✅ Answer & Explanation

    Sahi jawab: C) CnH2n-2

    Explanation: Alkynes me kam se kam ek carbon-carbon triple bond hota hai aur inka general formula CnH2n-2 hota hai.
12. Which hydrocarbon is used as fuel in 'LPG' cylinders for cooking?
    रसोई गैस (LPG) में मुख्य रूप से कौन सा हाइड्रोकार्बन प्रयुक्त होता है?
    (A) Methane

    (B) Butane and Propane

    (C) Ethyne

    (D) Pentane
    ✅ Answer & Explanation

    Sahi jawab: B) Butane and Propane

    Explanation: LPG (Liquefied Petroleum Gas) me main combustible hydrocarbons Butane aur Propane hote hain.
13. How many 'Covalent Bonds' are present in a molecule of Ethane ($C_2H_6$)?
    एथेन ($C_2H_6$) के एक अणु में कुल कितने सहसंयोजक बंध होते हैं?
    (A) 6

    (B) 7

    (C) 8

    (D) 9
    ✅ Answer & Explanation

    Sahi jawab: B) 7

    Explanation: Ethane me ek C-C single bond aur chhah C-H single bonds hote hain, jisse total 7 covalent bonds bante hain.
14. Which of the following is the 'First Member' of the Alkyne series?
    निम्नलिखित में से कौन सा एल्काइन श्रृंखला का प्रथम सदस्य है?
    (A) Methane

    (B) Ethyne

    (C) Ethene

    (D) Propyne
    ✅ Answer & Explanation

    Sahi jawab: B) Ethyne

    Explanation: Carbon-carbon triple bond banane ke liye kam se kam 2 carbon atoms chahiye, isliye pehla alkyne Ethyne (C2H2) hota hai.
15. What is the 'Homologous Series'?
    सजातीय श्रेणी (Homologous Series) क्या है?
    (A) Group of elements

    (B) Group of organic compounds with same functional group and formula pattern

    (C) Isotopes of carbon

    (D) Mixture of gases
    ✅ Answer & Explanation

    Sahi jawab: B) Group of organic compounds with same functional group and formula pattern

    Explanation: Aise organic compounds jinka general formula aur functional group same ho, aur do consecutive members me -CH2- unit (14u mass) ka difference ho.
16. Which gas is released during the 'Incomplete Combustion' of fuels and is highly poisonous?
    ईंधन के अपूर्ण दहन से कौन सी अत्यधिक जहरीली गैस निकलती है?
    (A) Carbon Dioxide

    (B) Carbon Monoxide

    (C) Methane

    (D) Sulfur Dioxide
    ✅ Answer & Explanation

    Sahi jawab: B) Carbon Monoxide

    Explanation: Limited oxygen me fuel jalne par Carbon Monoxide (CO) banta hai, jo hemoglobin se judkar asphyxiation cause karta hai.
17. Which hydrocarbon is used in 'Oxy-acetylene' torches for welding?
    वेल्डिंग में प्रयुक्त होने वाली ऑक्सी-एसिटिलीन ज्वाला में कौन सा हाइड्रोकार्बन उपयोग किया जाता है?
    (A) Methane

    (B) Ethyne

    (C) Ethene

    (D) Butane
    ✅ Answer & Explanation

    Sahi jawab: B) Ethyne

    Explanation: Ethyne (Acetylene) jab oxygen ke sath jalta hai to 3000°C se adhik high temperature flame deta hai, jo metal welding me kaam aati hai.
18. What is 'Geometrical Isomerism' (Cis-Trans) primarily found in?
    ज्यामितीय समावयवता (Cis-Trans) मुख्य रूप से किसमें पाई जाती है?
    (A) Alkanes

    (B) Alkenes

    (C) Alkynes

    (D) Alcohols
    ✅ Answer & Explanation

    Sahi jawab: B) Alkenes

    Explanation: Carbon-carbon double bond me restricted rotation ki wajah se groups ka spatial arrangement alag ho jata hai, jisse cis-trans isomerism banti hai.
19. Which of the following has 'Triple' bond?
    निम्नलिखित में से किस अणु में त्रिबंध उपस्थित है?
    (A) $C_2H_6$

    (B) $C_2H_4$

    (C) $C_2H_2$

    (D) $C_3H_8$
    ✅ Answer & Explanation

    Sahi jawab: C) $C_2H_2$

    Explanation: C2H2 (Ethyne) me dono carbon atoms ke beech triple bond (ek sigma aur do pi bonds) hota hai.
20. What is the IUPAC name for 'Isopropyl Alcohol'?
    आइसोप्रोपिल अल्कोहल का IUPAC नाम क्या है?
    (A) Propan-1-ol

    (B) Propan-2-ol

    (C) Ethane-1,2-diol

    (D) Butan-2-ol
    ✅ Answer & Explanation

    Sahi jawab: B) Propan-2-ol

    Explanation: Teen carbon ki continuous chain me second carbon par -OH group laga hone ki wajah se ise Propan-2-ol kehte hain.
21. Which 'Allotrope' of Carbon is the hardest known natural substance?
    कार्बन का कौन सा अपरूप सबसे कठोर ज्ञात प्राकृतिक पदार्थ है?
    (A) Graphite

    (B) Diamond

    (C) Fullerene

    (D) Coke
    ✅ Answer & Explanation

    Sahi jawab: B) Diamond

    Explanation: Diamond me har carbon chaar alag carbon atoms se rigid 3D tetrahedral network me juda hota hai, jo ise extremely hard banata hai.
22. Which gas is evolved when 'Calcium Carbide' reacts with water?
    कैल्शियम कार्बाइड की जल के साथ अभिक्रिया कराने पर कौन सी गैस निकलती है?
    (A) Methane

    (B) Ethane

    (C) Ethyne (Acetylene)

    (D) Hydrogen
    ✅ Answer & Explanation

    Sahi jawab: C) Ethyne (Acetylene)

    Explanation: CaC2 + 2H2O -> Ca(OH)2 + C2H2; is reaction se Acetylene (Ethyne) gas banti hai, jo fruit ripening me bhi unscientifically use hoti hai.
23. What is the 'Tetravalency' of carbon?
    कार्बन की 'चतुःसंयोजकता' (Tetravalency) क्या है?
    (A) Carbon forms 2 bonds

    (B) Carbon forms 3 bonds

    (C) Carbon forms 4 bonds

    (D) Carbon has 4 isotopes
    ✅ Answer & Explanation

    Sahi jawab: C) Carbon forms 4 bonds

    Explanation: Carbon ke outermost shell me 4 valence electrons hote hain, isliye octet complete karne ke liye ye 4 covalent bonds banata hai.
24. Which 'Allotrope' of Carbon is a good conductor of electricity?
    कार्बन का कौन सा अपरूप विद्युत का सुचालक है?
    (A) Diamond

    (B) Graphite

    (C) Fullerene

    (D) Coal
    ✅ Answer & Explanation

    Sahi jawab: B) Graphite

    Explanation: Graphite me har carbon sp2 hybridized hota hai aur ek electron free (delocalized) rehta hai, jo hexagonal layers ke beech current flow karwata hai.
25. What is the general formula of 'Alkenes'?
    एल्कीन श्रेणी का सामान्य सूत्र क्या है?
    (A) CnH2n+2

    (B) CnH2n

    (C) CnH2n-2

    (D) CnHn
    ✅ Answer & Explanation

    Sahi jawab: B) CnH2n

    Explanation: Alkenes me ek carbon-carbon double bond hota hai aur inka standard chemical formula CnH2n hota hai.
26. Which is the 'Simplest' Organic Compound?
    सबसे सरल कार्बनिक यौगिक कौन सा है?
    (A) Ethane

    (B) Methane

    (C) Methanol

    (D) Formic Acid
    ✅ Answer & Explanation

    Sahi jawab: B) Methane

    Explanation: Methane (CH4) ek single carbon atom wala simplest hydrocarbon aur basic organic compound hai.
27. What is 'Buckminsterfullerene'?
    बकमिनिस्टरफुलरीन (Buckminsterfullerene) क्या है?
    (A) A medicine

    (B) An allotrope of Carbon (C60)

    (C) A polymer

    (D) A fossil fuel
    ✅ Answer & Explanation

    Sahi jawab: B) An allotrope of Carbon (C60)

    Explanation: C60 carbon ka soccer-ball shaped spherical allotrope hai, jisme 20 hexagons aur 12 pentagons carbon atoms ke interconnected hote hain.
28. Which hydrocarbon is liquid at room temperature?
    कमरे के तापमान पर कौन सा हाइड्रोकार्बन द्रव अवस्था में होता है?
    (A) Methane

    (B) Ethane

    (C) Pentane

    (D) Butane
    ✅ Answer & Explanation

    Sahi jawab: C) Pentane

    Explanation: C1 se C4 tak ke alkanes gases hote hain, jabki C5 (Pentane) se C17 tak ke alkanes room temperature par liquids hote hain.
29. What is 'Substitution Reaction' typical for?
    प्रतिस्थापन अभिक्रिया (Substitution Reaction) मुख्य रूप से किनकी विशेषता है?
    (A) Alkanes

    (B) Alkenes

    (C) Alkynes

    (D) All of these
    ✅ Answer & Explanation

    Sahi jawab: A) Alkanes

    Explanation: Saturated hydrocarbons (Alkanes) direct addition nahi karte; ye sunlight ki presence me hydrogen atom ko halogen jaise groups se replace (substitute) karte hain.
30. Which of the following is used as a 'Dry Lubricant'?
    निम्नलिखित में से किसे 'शुष्क स्नेहक' के रूप में उपयोग किया जाता है?
    (A) Diamond

    (B) Graphite

    (C) Coke

    (D) Charcoal
    ✅ Answer & Explanation

    Sahi jawab: B) Graphite

    Explanation: Graphite ki hexagonal layers van der Waals forces se judi hoti hain jo easily slide karti hain, isliye ye high temperature machines me dry lubricant banta hai.

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