Bihar & India GK – Master Bank Mock Test – Free Online Practice

Bihar & India GK – Master Bank ke liye free mock test: 3562 questions, timer, negative marking aur explanation ke saath. Koi login nahi, koi payment nahi — turant shuru karein.

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Bihar & India GK – Master Bank ke liye ye 3562 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 3562)

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

1. Who was the first Governor of Bihar after independence?
   (A) Jairamdas Daulatram

   (B) Madhav Shrihari Aney

   (C) R. R. Diwakar

   (D) Zakir Husain
   ✅ Answer & Explanation

   Sahi jawab: A) Jairamdas Daulatram

   Explanation: Jairamdas Daulatram was the first Governor of Bihar from 15 August 1947 to 11 January 1948.
2. Which plastic is used for making 'Disposable' syringes in hospitals?
   (A) PVC

   (B) Polypropylene

   (C) Bakelite

   (D) Polyester
   ✅ Answer & Explanation

   Sahi jawab: B) Polypropylene

   Explanation: Polypropylene can withstand sterilization temperatures and is chemically resistant.
3. What is 'ABS' plastic commonly used for?
   (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 is known for its impact resistance and toughness.
4. Which chemical is used to 'Preserve' wooden furniture from termites?
   (A) Paint

   (B) Coal Tar or Creosote Oil

   (C) Water

   (D) Wax
   ✅ Answer & Explanation

   Sahi jawab: B) Coal Tar or Creosote Oil

   Explanation: Creosote is a powerful wood preservative.
5. What is 'Gutta-percha'?
   (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: It is trans-polyisoprene, which is harder and less elastic than natural rubber.
6. Which 'Detergent' is used for washing delicate woolens (Liquid detergent)?
   (A) Anionic detergent

   (B) Cationic detergent

   (C) Non-ionic detergent

   (D) Soap
   ✅ Answer & Explanation

   Sahi jawab: C) Non-ionic detergent

   Explanation: Non-ionic detergents do not have an electrical charge and are gentle on fibers.
7. What is the 'Backbone' of most synthetic polymers?
   (A) Oxygen chain

   (B) Nitrogen chain

   (C) Carbon chain

   (D) Silicon chain
   ✅ Answer & Explanation

   Sahi jawab: C) Carbon chain

   Explanation: Carbon-carbon bonds form the primary structure of most plastics.
8. Which chemical is used to 'Weight' silk and make it feel heavier?
   (A) Sugar

   (B) Tin or Lead salts

   (C) Starch

   (D) Salt
   ✅ Answer & Explanation

   Sahi jawab: B) Tin or Lead salts

   Explanation: Weighting adds body to thin silk fabrics but makes them more brittle.
9. What is 'Vulc-leather' (Vulcanized fiber)?
   (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: It is a tough, durable material used for luggage and electrical insulation.
10. Which metal ion is 'Removed' when hard water is softened using a Zeolite?
    (A) Sodium

    (B) Potassium

    (C) Calcium

    (D) Chloride
    ✅ Answer & Explanation

    Sahi jawab: C) Calcium

    Explanation: Zeolites exchange their Sodium ions for the Calcium ions in the water.
11. What is 'Epoxy Resin' used for?
    (A) Making clothes

    (B) Strong adhesives and coatings

    (C) Fuel

    (D) Cleaning
    ✅ Answer & Explanation

    Sahi jawab: B) Strong adhesives and coatings

    Explanation: Epoxies provide excellent adhesion and chemical resistance.
12. Which polymer is used for making 'Raincoats'?
    (A) PVC or Polyurethane-coated fabric

    (B) Cotton

    (C) Wool

    (D) Silk
    ✅ Answer & Explanation

    Sahi jawab: A) PVC or Polyurethane-coated fabric

    Explanation: These polymers are waterproof and lightweight.
13. What is 'Cellophane' made from?
    (A) Petroleum

    (B) Cellulose

    (C) Protein

    (D) Starch
    ✅ Answer & Explanation

    Sahi jawab: B) Cellulose

    Explanation: It is a thin, transparent sheet made from regenerated cellulose.
14. Which chemical is added to 'Soap' to make it 'Transparent'?
    (A) Sugar

    (B) Glycerol or Ethanol

    (C) Salt

    (D) Lime
    ✅ Answer & Explanation

    Sahi jawab: B) Glycerol or Ethanol

    Explanation: These additives prevent the soap crystals from forming, making it clear.
15. Which type of 'Glass' is used in making lenses for sunglasses because it absorbs Ultraviolet (UV) rays?
    (A) Soda Glass

    (B) Crookes Glass

    (C) Flint Glass

    (D) Pyrex Glass
    ✅ Answer & Explanation

    Sahi jawab: B) Crookes Glass

    Explanation: Crookes glass contains Cerium Oxide ($CeO_2$), which specifically filters out harmful UV radiation.
16. What is the 'Main Constituent' of Safety Match head?
    (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: Potassium chlorate acts as the oxidizer, and antimony trisulfide is the fuel; red phosphorus is on the box.
17. Which 'Dye' was the first synthetic dye ever discovered (by William Perkin)?
    (A) Indigo

    (B) Mauveine (Aniline Purple)

    (C) Alizarin

    (D) Methyl Orange
    ✅ Answer & Explanation

    Sahi jawab: B) Mauveine (Aniline Purple)

    Explanation: Discovered accidentally in 1856, it launched the modern chemical dye industry.
18. What is 'Lead Crystal' glass used for?
    (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: Adding Lead Oxide increases the refractive index, giving the glass a brilliant 'sparkle'.
19. Which chemical is used as a 'Developer' in black and white film processing?
    (A) Sodium Thiosulfate

    (B) Hydroquinone

    (C) Silver Nitrate

    (D) Acetic Acid
    ✅ Answer & Explanation

    Sahi jawab: B) Hydroquinone

    Explanation: It reduces the latent image (exposed silver halide) to visible metallic silver.
20. What is 'Graphene'?
    (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 is incredibly strong, conductive, and flexible; it is a 2D allotrope of carbon.
21. Which substance is used to 'Clarify' muddy water in Bihar’s rural areas?
    (A) Bleaching Powder

    (B) Alum (Phitkari)

    (C) Common Salt

    (D) Vinegar
    ✅ Answer & Explanation

    Sahi jawab: B) Alum (Phitkari)

    Explanation: Alum causes small particles to coagulate into larger 'flocs' that settle to the bottom.
22. What is 'Bakelite'?
    (A) Thermoplastic

    (B) Thermosetting Plastic

    (C) Natural Rubber

    (D) Fiber
    ✅ Answer & Explanation

    Sahi jawab: B) Thermosetting Plastic

    Explanation: It does not soften upon heating once molded, making it ideal for electrical insulators.
23. Which chemical is used to 'Preserve' milk samples for testing?
    (A) Formaldehyde

    (B) Potassium Dichromate

    (C) Sodium Chloride

    (D) Sugar
    ✅ Answer & Explanation

    Sahi jawab: B) Potassium Dichromate

    Explanation: Potassium dichromate prevents the growth of bacteria and the souring of milk.
24. What is the 'Refractive Index' of glass increased by?
    (A) Adding Aluminum

    (B) Adding Lead

    (C) Adding Sodium

    (D) Adding Iron
    ✅ Answer & Explanation

    Sahi jawab: B) Adding Lead

    Explanation: Lead oxide is the key ingredient in 'Crystal' glass for high brilliance.
25. Which 'Natural Dye' is extracted from the plant *Indigofera tinctoria*?
    (A) Saffron

    (B) Indigo

    (C) Turmeric

    (D) Henna
    ✅ Answer & Explanation

    Sahi jawab: B) Indigo

    Explanation: Indigo was historically a major export from Bihar during the colonial era.
26. What is 'Waterproof' ink made of?
    (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: Shellac acts as a binder that becomes water-insoluble once the ink dries.
27. Which gas is used in 'Incandescent' light bulbs to prevent the filament from evaporating?
    (A) Oxygen

    (B) Hydrogen

    (C) Argon//Nitrogen mixture

    (D) Chlorine
    ✅ Answer & Explanation

    Sahi jawab: C) Argon//Nitrogen mixture

    Explanation: An inert atmosphere allows the tungsten filament to reach high temperatures without burning.
28. What is 'Teflon' (PTFE)?
    (A) A polyamide

    (B) A fluorocarbon polymer

    (C) A polyester

    (D) A carbohydrate
    ✅ Answer & Explanation

    Sahi jawab: B) A fluorocarbon polymer

    Explanation: It is used for non-stick surfaces because carbon-fluorine bonds are extremely strong and non-polar.
29. Which chemical is used for 'Artificial fruit ripening' (specifically for Mangoes in Bihar)?
    (A) Calcium Carbide

    (B) Ethylene Gas

    (C) Acetylene

    (D) Both A and C
    ✅ Answer & Explanation

    Sahi jawab: D) Both A and C

    Explanation: Calcium carbide reacts with moisture to release Acetylene, which mimics Ethylene's ripening effect.
30. What is 'Fullerene' (C60) commonly called?
    (A) Diamond

    (B) Buckyminsterfullerene (Buckyball)

    (C) Graphite

    (D) Coke
    ✅ Answer & Explanation

    Sahi jawab: B) Buckyminsterfullerene (Buckyball)

    Explanation: It is a spherical carbon molecule used in nanotechnology and lubricants.

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