General Studies: Chemistry Industrial Chem Mock Test – Free Online Practice

General Studies: Chemistry Industrial Chem ke liye free mock test: 103 questions, timer, negative marking aur explanation ke saath. Koi login nahi, koi payment nahi — turant shuru karein.

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General Studies: Chemistry Industrial Chem ke liye ye 103 questions ka practice set General Knowledge pattern par banaya gaya hai. Test me 45 second per question ka timer hai aur har galat answer par 0.25 marks kate jaate hain — bilkul asli exam jaisa. Submit karne ke baad aapko exact score, accuracy aur har question ka explanation milta hai. Bihar ke competitive exams (BPSC, BSSC, Bihar Police, BTSC) ki tayari karne wale students ke liye.

Practice Questions (30 of 103)

Neeche is set ke kuch questions hain — inhi par aapka timed test banega. Answer dekhne ke liye “Answer” par click karein.

1. Which plastic is used for making 'Disposable' syringes in hospitals?
   अस्पतालों में 'डिस्पोजेबल' सिरिंज बनाने के लिए किस प्लास्टिक का उपयोग किया जाता है?
   (A) PVC

   (B) Polypropylene

   (C) Bakelite

   (D) Polyester
   ✅ Answer & Explanation

   Sahi jawab: B) Polypropylene

   Explanation: Polypropylene sterilization temperatures ko bina pighle jhel sakta hai aur inert chemical resistance deta hai.
2. What is 'ABS' plastic commonly used for?
   'ABS' प्लास्टिक का सामान्यतः किसमें उपयोग किया जाता है?
   (A) Bags

   (B) LEGO bricks and computer cases

   (C) Clothing

   (D) Food wrapping
   ✅ Answer & Explanation

   Sahi jawab: B) LEGO bricks and computer cases

   Explanation: Acrylonitrile Butadiene Styrene (ABS) apni high impact resistance aur toughness ke liye LEGO toys aur laptop bodies me use hota hai.
3. Which chemical is used to 'Preserve' wooden furniture from termites?
   दीमक से लकड़ी के फर्नीचर को सुरक्षित रखने के लिए किस रसायन का उपयोग किया जाता है?
   (A) Paint

   (B) Coal Tar or Creosote Oil

   (C) Water

   (D) Wax
   ✅ Answer & Explanation

   Sahi jawab: B) Coal Tar or Creosote Oil

   Explanation: Creosote oil aur coal tar distillates powerful antifungal aur antitermite wood preservative hote hain.
4. What is 'Gutta-percha'?
   'गट्टा-पर्चा' (Gutta-percha) क्या है?
   (A) Synthetic rubber

   (B) Natural isomer of rubber used for dental fillings

   (C) A type of glue

   (D) Fiber
   ✅ Answer & Explanation

   Sahi jawab: B) Natural isomer of rubber used for dental fillings

   Explanation: Ye natural rubber ka trans-polyisoprene isomer hai, jo hard aur rigid hone ke kaaran root canal fillings me use hota hai.
5. Which 'Detergent' is used for washing delicate woolens (Liquid detergent)?
   नाजुक ऊनी कपड़ों की धुलाई के लिए किस प्रकार के डिटर्जेंट का उपयोग किया जाता है?
   (A) Anionic detergent

   (B) Cationic detergent

   (C) Non-ionic detergent

   (D) Soap
   ✅ Answer & Explanation

   Sahi jawab: C) Non-ionic detergent

   Explanation: Non-ionic detergents bina kisi ionic charge ke mild surfactants hote hain, jo sensitive woolen fibers ko damage nahi karte.
6. What is the 'Backbone' of most synthetic polymers?
   अधिकांश सिंथेटिक बहुलकों की 'रीढ़' (Backbone) किस तत्व की श्रृंखला होती है?
   (A) Oxygen chain

   (B) Nitrogen chain

   (C) Carbon chain

   (D) Silicon chain
   ✅ Answer & Explanation

   Sahi jawab: C) Carbon chain

   Explanation: Carbon ki high catenation ability ki wajah se C-C covalent bonds sabhi standard plastics ka main skeleton banate hain.
7. Which chemical is used to 'Weight' silk and make it feel heavier?
   रेशम के कपड़े को भारी और घना महसूस कराने (वेटिंग) के लिए किस रसायन का उपयोग किया जाता है?
   (A) Sugar

   (B) Tin or Lead salts

   (C) Starch

   (D) Salt
   ✅ Answer & Explanation

   Sahi jawab: B) Tin or Lead salts

   Explanation: Silk processing me fabric ko heavy body dene ke liye stannic chloride (tin salts) ya lead compounds se soak karte hain.
8. What is 'Vulc-leather' (Vulcanized fiber)?
   'वल्क-लेदर' (वल्कनीकृत फाइबर) क्या है?
   (A) Animal skin

   (B) Paper treated with Zinc Chloride

   (C) Plastic

   (D) Synthetic leather
   ✅ Answer & Explanation

   Sahi jawab: B) Paper treated with Zinc Chloride

   Explanation: Pure cellulose paper ko Zinc Chloride ($ZnCl_2$) solution se gelatinize karke tough sheet banayi jaati hai jo luggage aur electrical insulation me use hoti hai.
9. Which metal ion is 'Removed' when hard water is softened using a Zeolite?
   जिओलाइट विधि द्वारा कठोर जल को मृदु बनाते समय कौन से धातु आयन हटाए जाते हैं?
   (A) Sodium

   (B) Potassium

   (C) Calcium

   (D) Chloride
   ✅ Answer & Explanation

   Sahi jawab: C) Calcium

   Explanation: Hydrated sodium aluminum silicate (Zeolite) water me moujood hardness-causing Calcium ($Ca^{2+}$) aur Magnesium ($Mg^{2+}$) ions ko replace karke Sodium release karta hai.
10. What is 'Epoxy Resin' used for?
    'एपॉक्सी रेजिन' का मुख्य उपयोग क्या है?
    (A) Making clothes

    (B) Strong adhesives and coatings

    (C) Fuel

    (D) Cleaning
    ✅ Answer & Explanation

    Sahi jawab: B) Strong adhesives and coatings

    Explanation: Epoxy resins thermosetting polymers hote hain jo metal aur glass ko jodne ke liye heavy-duty adhesives (jaise Araldite) banate hain.
11. Which polymer is used for making 'Raincoats'?
    'रेनकोट' (बरसाती) बनाने के लिए किस बहुलक का उपयोग किया जाता है?
    (A) PVC or Polyurethane-coated fabric

    (B) Cotton

    (C) Wool

    (D) Silk
    ✅ Answer & Explanation

    Sahi jawab: A) PVC or Polyurethane-coated fabric

    Explanation: Polyvinyl Chloride (PVC) aur Polyurethane non-porous aur waterproof hote hain, isliye water repellent outerwear banate hain.
12. What is 'Cellophane' made from?
    'सेलोफेन' (Cellophane) किससे बनता है?
    (A) Petroleum

    (B) Cellulose

    (C) Protein

    (D) Starch
    ✅ Answer & Explanation

    Sahi jawab: B) Cellulose

    Explanation: Wood pulp ke natural cellulose ko viscose process ke dwara thin, transparent regenerated film me cast karke Cellophane banaya jata hai.
13. Which chemical is added to 'Soap' to make it 'Transparent'?
    साबुन को 'पारदर्शी' (Transparent) बनाने के लिए उसमें क्या मिलाया जाता है?
    (A) Sugar

    (B) Glycerol or Ethanol

    (C) Salt

    (D) Lime
    ✅ Answer & Explanation

    Sahi jawab: B) Glycerol or Ethanol

    Explanation: Soap ko ethanol me dissolve karke excess solvent evaporate karte hain aur glycerol add karte hain taaki crystals na banein aur soap clear rahe.
14. Which type of 'Glass' is used in making lenses for sunglasses because it absorbs Ultraviolet (UV) rays?
    धूप के चश्मों के लेंस बनाने में किस प्रकार के कांच का उपयोग किया जाता है क्योंकि यह पराबैंगनी किरणों को सोखता है?
    (A) Soda Glass

    (B) Crookes Glass

    (C) Flint Glass

    (D) Pyrex Glass
    ✅ Answer & Explanation

    Sahi jawab: B) Crookes Glass

    Explanation: Crookes glass me Cerium Oxide ($CeO_2$) hota hai, jo visible light ko aane deta hai par harmful UV rays ko cut-off kar deta hai.
15. What is the 'Main Constituent' of Safety Match head?
    माचिस की तीली के सिरे (हेड) पर मुख्य घटक क्या होता है?
    (A) Red Phosphorus

    (B) Potassium Chlorate and Antimony Trisulfide

    (C) Sulfur

    (D) White Phosphorus
    ✅ Answer & Explanation

    Sahi jawab: B) Potassium Chlorate and Antimony Trisulfide

    Explanation: Matchstick head par Potassium Chlorate ($KClO_3$) oxidizing agent aur Antimony Trisulfide ($Sb_2S_3$) combustible fuel hota hai; Red Phosphorus box ki side par hota hai.
16. Which 'Dye' was the first synthetic dye ever discovered (by William Perkin)?
    विलियम पर्किन द्वारा खोजी गई दुनिया की पहली सिंथेटिक डाई कौन सी थी?
    (A) Indigo

    (B) Mauveine (Aniline Purple)

    (C) Alizarin

    (D) Methyl Orange
    ✅ Answer & Explanation

    Sahi jawab: B) Mauveine (Aniline Purple)

    Explanation: 1856 me 18-year-old William Perkin ne quinine banate waqt accidentally Aniline se pehli synthetic purple dye Mauveine khoji thi.
17. What is 'Lead Crystal' glass used for?
    'लेड क्रिस्टल' कांच का उपयोग किसलिए किया जाता है?
    (A) Windows

    (B) Decorative decanters and high-quality glassware

    (C) Lab beakers

    (D) Cooking pans
    ✅ Answer & Explanation

    Sahi jawab: B) Decorative decanters and high-quality glassware

    Explanation: Lead Oxide ($PbO$) milane se glass ka refractive index aur density badh jati hai, jisse wo cut karne par heere jaisa chamakta hai.
18. Which chemical is used as a 'Developer' in black and white film processing?
    ब्लैक एंड व्हाइट फोटोग्राफी में 'डेवलपर' के रूप में किस रसायन का उपयोग किया जाता है?
    (A) Sodium Thiosulfate

    (B) Hydroquinone

    (C) Silver Nitrate

    (D) Acetic Acid
    ✅ Answer & Explanation

    Sahi jawab: B) Hydroquinone

    Explanation: Hydroquinone exposed silver halide grains ko black metallic silver particles me chemically reduce karke image ko visible banata hai.
19. What is 'Graphene'?
    'ग्राफीन' (Graphene) क्या है?
    (A) A type of plastic

    (B) A single layer of carbon atoms in a hexagonal lattice

    (C) A liquid fuel

    (D) A metal alloy
    ✅ Answer & Explanation

    Sahi jawab: B) A single layer of carbon atoms in a hexagonal lattice

    Explanation: Graphene carbon ka 2D allotrope hai, jo single-atom-thick honeycomb lattice me arranged hota hai aur steel se 200 guna strong hota hai.
20. Which substance is used to 'Clarify' muddy water in rural areas by coagulation?
    गंदले पानी को साफ करने के लिए स्कंदन (coagulation) हेतु किस पदार्थ का उपयोग किया जाता है?
    (A) Bleaching Powder

    (B) Alum (Phitkari)

    (C) Common Salt

    (D) Vinegar
    ✅ Answer & Explanation

    Sahi jawab: B) Alum (Phitkari)

    Explanation: Potash Alum [$K_2SO_4 \cdot Al_2(SO_4)_3 \cdot 24H_2O$] clay particles ke negative charge ko neutralize karke heavy flocs banakar sediment kar deta hai.
21. What is 'Bakelite'?
    'बेकेलाइट' किस प्रकार का बहुलक है?
    (A) Thermoplastic

    (B) Thermosetting Plastic

    (C) Natural Rubber

    (D) Fiber
    ✅ Answer & Explanation

    Sahi jawab: B) Thermosetting Plastic

    Explanation: Phenol aur Formaldehyde ka cross-linked thermosetting polymer hai jo ek baar set hone ke baad heat dene par dobara pighalta nahi hai.
22. Which chemical is used to 'Preserve' milk samples for analytical laboratory testing?
    प्रयोगशाला परीक्षण के लिए दूध के नमूनों को संरक्षित करने हेतु किस रसायन का उपयोग किया जाता है?
    (A) Formaldehyde

    (B) Potassium Dichromate

    (C) Sodium Chloride

    (D) Sugar
    ✅ Answer & Explanation

    Sahi jawab: B) Potassium Dichromate

    Explanation: Potassium Dichromate ($K_2Cr_2O_7$) milk me bacterial souring aur fat degradation ko rok kar composite sample testing me use hota hai.
23. The 'Refractive Index' and brilliance of optical glass is increased by adding which metal oxide?
    ऑप्टिकल कांच का अपवर्तनांक और चमक बढ़ाने के लिए उसमें किस धातु का ऑक्साइड मिलाया जाता है?
    (A) Aluminum

    (B) Lead

    (C) Sodium

    (D) Iron
    ✅ Answer & Explanation

    Sahi jawab: B) Lead

    Explanation: Lead Monoxide ($PbO$) optical flint glass ka refractive index 1.7 tak badha deta hai, jisse prisms aur camera lenses bante hain.
24. Which 'Natural Dye' is extracted from the plant *Indigofera tinctoria*?
    पौधे *Indigofera tinctoria* से कौन सा प्रसिद्ध प्राकृतिक रंजक प्राप्त होता है?
    (A) Saffron

    (B) Indigo (Neel)

    (C) Turmeric

    (D) Henna
    ✅ Answer & Explanation

    Sahi jawab: B) Indigo (Neel)

    Explanation: Indigo (Neel) ek plant vat dye hai jiska historical production Champaran, Bihar me British colonial era ke doran bohot prominent tha.
25. What is Indian 'Waterproof' drafting ink made of?
    वाटरप्रूफ ड्राफ्टिंग स्याही (Indian Ink) मुख्य रूप से किससे बनती है?
    (A) Sugar and Water

    (B) Carbon Black and Shellac in Alkali

    (C) Pencil lead

    (D) Alcohol
    ✅ Answer & Explanation

    Sahi jawab: B) Carbon Black and Shellac in Alkali

    Explanation: Carbon lampblack ko alkaline shellac solution ke sath mix karte hain; dry hone par shellac water-insoluble protective layer banata hai.
26. Which gas is filled in traditional 'Incandescent' light bulbs to prevent tungsten evaporation?
    पारंपरिक बिजली के बल्बों में टंगस्टन फिलामेंट के वाष्पीकरण को रोकने के लिए कौन सी गैस भरी जाती है?
    (A) Oxygen

    (B) Hydrogen

    (C) Argon and Nitrogen mixture

    (D) Chlorine
    ✅ Answer & Explanation

    Sahi jawab: C) Argon and Nitrogen mixture

    Explanation: Argon aur Nitrogen ka inert gas mixture filament ko oxidize hone se bachata hai aur high operating temperatures par evaporation slow karta hai.
27. What is 'Teflon' (PTFE) chemically?
    रासायनिक रूप से 'टेफ्लॉन' (PTFE) क्या है?
    (A) A polyamide

    (B) A fluorocarbon polymer

    (C) A polyester

    (D) A carbohydrate
    ✅ Answer & Explanation

    Sahi jawab: B) A fluorocarbon polymer

    Explanation: Polytetrafluoroethylene ($CF_2=CF_2$ ka polymer) ek fluorocarbon hai jisme extremely strong C-F bonds non-stick surface provide karte hain.
28. Which chemical is commercially used for 'Artificial fruit ripening' by releasing acetylene?
    कच्चे फलों को पकाने के लिए किस रसायन का उपयोग किया जाता है जो नमी से एसिटिलीन छोड़ता है?
    (A) Calcium Carbonate

    (B) Ethylene Gas

    (C) Acetylene

    (D) Calcium Carbide
    ✅ Answer & Explanation

    Sahi jawab: D) Calcium Carbide

    Explanation: Calcium Carbide ($CaC_2$) atmospheric moisture se react karke Acetylene gas ($C_2H_2$) banata hai jo natural ethylene ripening ko mimic karti hai.
29. What is 'Fullerene' (C60) commonly called due to its dome-like structure?
    कार्बन के C60 अपरूप को उसकी संरचना के कारण आमतौर पर क्या कहा जाता है?
    (A) Diamond

    (B) Buckminsterfullerene (Buckyball)

    (C) Graphite

    (D) Coke
    ✅ Answer & Explanation

    Sahi jawab: B) Buckminsterfullerene (Buckyball)

    Explanation: Architect Buckminster Fuller ke geodesic domes jaisi soccer-ball shape hone ke kaaran C60 ko Buckyball kaha jata hai.
30. Which substance is used as a volatile 'Propellant' in aerosol deodorant sprays?
    एरोसोल स्प्रे और डियोड्रेंट में तरल को बाहर निकालने के लिए किस 'प्रणोदक' (Propellant) का उपयोग होता है?
    (A) Water

    (B) Liquefied Petroleum gases like Butane or Propane

    (C) Alcohol only

    (D) Oil
    ✅ Answer & Explanation

    Sahi jawab: B) Liquefied Petroleum gases like Butane or Propane

    Explanation: CFCs ban hone ke baad pressurized cans me liquid hydrocarbon propellants (Isobutane/Propane) use hote hain jo nozzle khulte hi vaporize hokar mist banate hain.

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