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GK Tricky Questions

  • Gas which is used in Fire Extinguishers – Carbon Dioxide
  • Gas which is used in Cigarette Lighters – Butana.

  • Dynamo – Mechanical Energy to Electrical Energy.
  • Tube Lights – Electrical Energy to Light Energy.
  • Electric Motor – Electrical Energy to Mechanical Energy.
  • Electrical Bulbs – Electrical Energy to Light and Heat Energy.
  • Loudspeakers – Electrical Energy to Sound Energy.
  • Solar Cells – Solar Energy to Electrical Energy.
  • Candles – Chemical Energy to Light and Heat Energy.
  • Microphone – Sound Energy to Electrical Energy.
  • Electrical Cells – Chemical Energy to Electrical Energy

  • Number of Chromosomes in Humans – 46.
  • Number of Autosomes in Humans – 22.

  • Epiculture – Beekeeping.
  • Sericulture – Silk Farming.

  • Sound of high pitch: Shrill 
  • Sound of low pitch: Sharp 

  • Adhesion: Force of attraction between unlike molecules 
  • Cohesion: Force of attraction between like molecules 

Names of Fat soluble vitamins


  • Vitamin A – Retinol
  • Vitamin D – Cholecalciferol
  • Vitamin E – Tocopherols
  • Vitamin K – Phylloquinone and farnoquinone

  • Hormones secreted by the thyroid gland – Triiodothyronine(T3), Thyroxine(T4) and calcitonin.
  • Hormones secreted by the parathyroid gland – Parathormone.


Deficiencies in Minerals 
  • Iron – Anaemia 
  • Potassium – Hypokalemia 
  • Sodium – Hyponatremia 
  • Iodine – Goitre 
  • Calcium – Rickets and Osteomalacia 
  • Protein – Kwashiorkar and Marasmus 

  • Red + Green + Blue = White
  • Red + Blue = Magenta
  • Blue + Green = Peacock

  • Ignetious Rock – Mica , Granite , Basalt , LimeStone
  • Metamorphic Rock – Gneiss , Marble , Quartzite

  • Rotational Speed of Moon – 27 Days 7hrs 43 min & 11.47 sec. 
  • Revolution Speed of Moon – 27 Days 7hrs 43 min & 11.47 sec. (Same) 

  • Accu- Pressure – Medical theraphy Using Pressure 
  • Accu-Puncture – Medical Theraphy Using Puncture 

  • Refraction of Light – Twinkling of Star 
  • Total Internal Reflection – Mirage

  • Plantation Crop – Cotton , Coffee , Tobacco 
  • Non Plantation Crop - Wheat 

  • Thymine – Present in DNA 
  • Uracil – Present in RNA 

  • Longest Day – 21 June 
  • Shortest Day – 22 December 

  • ECG – Electro Cradio Graph ( People Mistake Here – Not Electro Cardio Gram ) 
  • EEG - Electro Enceflo Graph ( People Mistake Here – Not Electro Enceflo Gram ) 

  • Ohm – Unit of Resistance 
  • Mho – Unit of Conductance 

  • When you go from Bright Light to Dark Light – Pupil Enlarge It Size 
  • When you go from Dark Light to Bright Light – Pupil Contract it Size 


  • Annual Percentage Rate(APR) is used only for borrowings. 
  • Annual Equivalent Rate (AER) is used only for savings and investments. 

  • Outer Membrane of Meninges – Dura Mater 
  • Inner Membrane of Meninges – Pia Matter 

  • Urea Formed in – Liver 
  • HCL formed in – Stomach 

  • Vector Quantity – Magnitude + Displacement ( Ex. Velocity , Acceleration ) 
  • Scalar Quantity – Only Magnitude ( Ex. Distance , Speed , Work , Energy ) 

  • Absolute Zero - -273 Degree Celsius 
  • Absolute Zero - - 460 Degree Fahrenheit 

  • Angle Made By the Earth Axis with the Perpendicular to the orbital Plane – 23.5 Degree 
  • Angle Made By the Earth Axis with the Plane of the Earths orbit – 66.5 Degree 

  • 1 Cal = 4.184 J 
  • 1 Kilo Cal = 1000 Cal 

  • Animal Cell – Plastid is absent 
  • Plant Cel – Plastid is Present 

  • Steel – Mixture of Fe + C
  • Stainless Steel – Mixture of Fe +Cr + Ni

  • Leaves – It is responsible for production of food .
  • Leaf , root , Seed – All these are responsible for respiration of a Plant

  • CNS – Central nervous system
  • PNS – Peripheral nervous system 

  • Euaryotic – Presents Nucleus
  • Prokaryotic – Absence of Nucleus .

  • Conduction – It is a process through which heat is transferred in solid .
  • Convection – The process of the hotter fluid moving and transferring heat to the colder surrounding

  • Rotational Speed Of Earth – 27.8km/min
  • Revolution Speed of Earth – 29.8Km/Sec

  • Water Gas – CO + H2
  • Prdoucer Gas – CO + N2
  • King of Acid – H2So4

  • International time meridian - 0 degree Longitudinal Line 
  • International Date meridian - 180 degree Longitudinal Line 

  • Hypertension - High Blood Pressure 
  • Hypotension - Low Blood Pressure 
  • Hybernation - Some animals sleep during full winter , this time is called Hybernation 
  • Estivation - Some animals sleep during full summer . this time is called Estivation 

  • Liquid + Liquid = Emulsion
  • Liquid + Gas = Aerosol
  • Liquid + Solid = Gel


  • 3 Laws of Motion – By Newton.
  • 3 Planetary Laws of Motion – By Kepler.

  • Blind Spot – Also known as Spot of No Vision 
  • Yellow Spot – Also Known as Spot of Best Vision 

  • Charge of Proton - +1.6 x 10^-19 C 
  • Charge of Neutron – 0 C 
  • Charge of Electron - -1.6 x 10 ^ -19 C


  • Perihelion – Nearest position of the Earth to the Sun ( jan 1st week)
  • Aphelion – Farthest position of the Earth to the Sun (july 1st week)

  • National Highways are specified by Yellow and White colour milestones.
  • State Highways are specified by Green and White colour milestones.

  • Exocrine Gland: The glands that secrete its product into a duct. For example, salivary gland secretes the saliva into the salivary duct.
  • Endocrine Gland: The Gland secrete its product directly into the blood. 


  • Pollination by wind – Anemophily.
  • Pollination by bird – Ornithophily.
  • Pollination by water – Hydrophily.
  • Pollination by insects – Entomophily.


  • Longest cave in the world – Mammoth Cave.
  • Deepest cave in the World – Krubera Cave.

  • Scientific Name of Mango – Mangifera Indica.
  • Scientific Name of Papaya – Carica Papaya.

  • Horticulture – Art of garden cultivation 
  • Pisciculture – Art of rearing fish 

  • The yellow colour of cow’s milk is due to the presence of riboflavin 
  • The yellow colour of human urine is due to the presence of urochrome 

  • Unit of Luminosity – Candela 
  • Unit of Conductivity- Mho 

  • Concology – Study of Shells 
  • Oology – Study of Eggs

  • Voice Box in Birds – Syrix 
  • Voice Box in Human – Larynx 

  • Largest blood vessel in the body – Aorta 
  • Smallest blood vessel in the body – Capillaries 


  • Smallest bone – Stapes 
  • Longest bone – Femur 

  • Lifespan of RBC - 120 days 
  • Lifespan of WBC - 3-4days 
  • Lifespan of Blood Platelets – 5 – 9 days 

  • Functional unit of Kidney – Nephron 
  • Functional unit of Brain – Neuron 

  • Largest gland – Liver 
  • Smallest gland – Pineal 

  • pH of Human blood – 7.5 
  • pH of Human urine – 6.0 

  • Smallest muscle – Stapedius 
  • Largest muscle – Gluteus maximus 

  • Longest Cell – Neuron (Nerve cell) 
  • Smallest Cell – Granule cell (of the Cerebellum) 4.5 in Size 
  • and RBC (5 in size) 

  • Disease Bacteria 
  • Typhoid – Salmonella Typhi 
  • Cholera – Vibrio cholerae
  • Plague – Yersinia pestis 
  • Syphilis – Treponema Pallidum 
  • Gonorrhoea – Neisseria Gonorrhoea 
  • Diphtheria – Corynebacterium Diphtheria 
  • Pneumonia – Diplococcus Pneumoniae 
  • Tuberculosis – Mycobacterium Tuberculosis 
  • Tetanus – Clostridium Tetani 
  • Leprosy - Mycobacterium Leprae 
  • Botulism – Clostridium Botulinum 


  • Most Reactive metal – Caesium
  • Most Reactive Non Metal – Fluorine

  • Colloidal Soultion - is a solution in which a material is evenly suspended in a liquid
  • Non Colloidal Solution - Milk is an emulsified colloid of liquid butterfat globules dispersed within a water-based solution

  • Unit of Momentum – kilogram per second
  • Unit of Moment of Inertia – Kilogram square meter

  • Non Luminous zone is the Hottest part of gas flame
  • Luminous Zone is the Coldest part of gas flame

  • Most Malleable metal – Gold
  • Non Malleable metal – Silver
  • Citric Acid – An organic acid
  • Citric Acid – Also present in Lemon , or citrus fruits

  • Unit of Plane Angle – Radian
  • Unit of Solid Angle – Steradian

  • PH value of Saliva – 6.5
  • PH value of Milk – 6.5

  • PH of Urin – 5-8 
  • PH of Blood – 7.4 

  • Largest External Organ – Skin 
  • Largest Internal Organ – Liver 

  • Element Most common in Human Body – Oxygen 
  • Mineral Most common in Human Body – Calcium 
  • Compound Most common in Human Body – Water 

  • SI unit of Electric power – Kilowatt 
  • SI unit of Electric Energy - Kilowatt-hour 

  • Chemical Name of Epsom Salt – Magnesium Sulphate 
  • Chemical Name of Glauber’s Salt – Sodium Sulphate decahydrate 

  • Atom Bomb – It is based on Nuclea fission , & 
  • Nuclear fission was first demonstrated by Hatin and Fritz Strassmann 

  • Inner Most Part of Flame – Black due to presence of unburnt carbon 
  • Outer most part of Flame – Blue due to complete combustion of fuel 

  • Red Colour Glass is a Mixture of – Copper Oxide (CuO) 
  • Ruby Red Colour Glass is a Mixture of – Goldchloride (AuCl3) 

  • Chemical name of Caustic Lotion - Silver Nitrate
  • Chemical name of Caustic Soda - Sodium Hydroxide
  • Chemical name of Caustic Potash - Potassium Hydroxide
  • Chemical name of Gypsum - Calcium Sulphate 
  • Chemical name of Plaster Of Paris - Calcium Sulphate 
  • Chemical name of Carborundum - Silicon Carbide

  • Silviculture - Forest Planting
  • Olericulture - Vegetable growing
  • Arboriculture - Cultivation of Tree
  • Viticulture - Cultivation of Grape

  • Most abundant metal present in earth's surface –Aluminum
  • Most abundant metal present in earth – Iron

  • Largest lake in the world - Caspian Sea
  • Largest Fresh Water Lake in the world - Lake Superior

  • First National park in the world - Yellowstone National Park , usa 1872
  • First National park in India - Jim Corbett National Park

  • Toe Bones or Phalanges - 14 (Each foot)
  • Wrist Bones or Carpals - 8 (Each Wrist)

  • Erg is the unit of Work
  • Dyne is the unit of Force

  • Covering of Brain – Meninges
  • Covering of Heart – Pericardium
  • Covering of Lungs – Pleura

  • Tartaric Acid – Tamarind, Grapes
  • Formic Acid – Ant, Wasp, Honey Bee
  • Stearic Acid – Oil, Fat
  • Capric Acid – Coconut

  • Water Soluble Vitamins – Vitamin B and C
  • Fat Soluble Vitamins – Vitamin A, D, E and K

  • Hyperglycemia – High blood sugar
  • Hypoglycemia – Low blood sugar

  • Oncology – Study of Tumour
  • Ontology – Study of Reality

  • King of Chemicals – Sulphuric Acid 
  • Quick Silver – Mercury 
  • Gypsum/Plaster of Paris – Calcium Sulphate 
  • Lunar Caustic – Silver Nitrate 
  • Green Vitriol – Ferrous Sulphate 
  • Blue Vitriol – Copper Sulphate 
  • White Vitriol – Zinc Sulphate 
  • Baking Soda – Sodium Bicarbonate 
  • Washing Soda – Sodium Carbonate 
  • Green alcohol – Ethanol 
  • Fluming Sulphuric Acid – Oleum 
  • Standard solvent – Water 
  • Marble – Calcium Carbonate 
  • Flower of Zinc – Zinc Oxide 
  • Vinegar – Acetic acid 
  • Epsom salt – Magnesium Sulphate 
  • Dry Ice – Solid Carbon dioxide 
  • Bleaching Powder – Calcium Oxychloride 
  • Nausadar – Ammonium Chloride 
  • Caustic Soda – Ammonium Hydroxide 
  • Potash Alum - Potassium Aluminium Sulphate 
  • Quick Lime – Calcium Oxide 
  • Marsh Gas – Methane 
  • Magnesia – Magnesium Oxide 
  • Laughing Gas – Nitrous Oxide 
  • Chloroform – Trichloro Methane 
  • Vermelium – Mercuric Sulphide 
  • Borax – Borax 
  • Sugar – Sucrose 
  • Heavy Water – Deuterium Oxide 
  • Sand – Silicon Oxide 

  • Blood Bank of the Body is – Spleen 
  • Blood is Purified by which organ – Kidneys 

  • Hot summer & Low rainfall develops – Black Soil 
  • Soils with fairly equal proportions of sand, silt and clay are Known as – Loam 

  • Fructose – It is also called fruit sugar , Levulose , It is monosaccharide 
  • Sucrose - Disaccharides 



  • Life Span of Butterfly (Vanessa cardui)– 12 Months 
  • Butterfly – Taste with Feet 

  • Gold is usually mixed with copper, zinc or silver to create an alloy suitable for use in jewelry. 
  • Pure gold is Homogeneous in Nature 
  • Pure Gold is of 24K (24 Karat) 

Mastitis is a disease of – Udder organ
Mastitis is a disease of – Cow , etc.

Worlds Smallest Egg – Humming Bird
Worlds Largest Egg – Ostrich
Egg laying Animal Is termed as – Oviparous
Birds can fly backward – Humming Bird

  • Posterior Pituitary Gland – Receives hormones from hypothalamus , No hormone synthesised here 
  • Anterior Pituitary Gland – Follicle stimulating Hormone (FSH) , Luteinising hormone (LH)










  • Vitamin B5 – Also known as Niacin 
  • Vitamin B6 – Also known as Pyridoxine 
  • Vitamin B12 – Also known as Cynacobalamin
  • Diphtheria Affects Respiratory Tract
  • Tetanus (Low Jaw) Affect Central Nervous System 

    • Chemical name of Gypsum - Calcium Sulphate 
    • Chemical name of Plaster Of Paris - Calcium Sulphate 

    • Silviculture - Forest Planting 
    • Olericulture - Science of vegetable growing 
    • C6 H12 O6 – Glucose 
    • C12 H22 O11 – Sucrose 

    • Animal Cell doesnot have Cell Wall . 
    • Plant Cell have Cell Wall . 

    • Fructose – Fruit Sugar
    • Lactose – Milk Sugar
    • Sucrose – Table Sugar

    • Clock wise Cyclone – Southern Hemisphere
    • Anticlockwise Cyclone – Northern Hemisphere

    • Isothermobath – Equal temperature at given ocean depth
    • Isothermobrose – Equal ration of summer rainfall to annual rainfall

    • Scientific unit of Inductance - Henry
    • Scientific unit of Electrical Conductance - Siemens

    • Angiology - Study of blood vascular system
    • Andrology - Study of male reproductive organ
    • Gynaecology - Study of female reproductive organ

    • Total Bones in Metacarpals - 5*2 = 10
    • Total Bones in Metatarsals – 5*2 = 10

    • Quick Lime – Calcium oxide
    • Marble – Calcium carbonate
    • Plaster of Paris – Calcium sulphate

    • E2 – Is also known as Oestradiol Hormone
    • E3 – Is also known as Oestriol Hormone

    • Sound - Cannot travel in Vacuum
    • Sound - Can travel faster in metals than in air

    • Presbyopia – In this defect both near and far objects are not clearly visible
    • Astigmatism – In this defect eye cannon see horizontal and verticle lines clearly .

    • Tallest Angiosperm – Eucalyptus
    • Tallest Gymmnosperm – Sequiasempervirens

    • Pepsin - Is Secreted by Stomach
    • Eripsin - Is Secreted by Small Intestine

    • Lactose - Digest Lactose into glucose and galactose
    • Sucrose - Digest Sucrose into glucose and fructose

    • Gastric Amylase - Convert Starch to maltose
    • Pancreatic Amylase - Convert Starch to maltose

    • Sternum - Located at Chest
    • Hyoid - Located at Neck


    • Myology - Study of Muscles.
    • Mycology - Study of Fungi.
    • Phycology -  study of algae


    • Metal in liquid state – Mercury (Hg)
    • The non metal that conducts electricity – Graphite.
    • Non Metal that is liquid in room temperature – Bromine (Br)

    • Fastest animal in water – Sailfish (can swim up to 68 miles per hour)
    • Fastest Mammal in water – Dall Porpoises (can swim up to 35 miles per hour)


    • Gravitational Constant (G) - 6.67408 × 10-11 m3 kg-1 s-2 
    • Acceleration due to Gravity (g) - 9.8 m/s/s

    • Gas Constant – 8.314 J / mol. K. 
    • Boltzmann Constant - 1.38064852 × 10−23 joule per kelvin (J/K)

    • Permeability of Vacuum 1.257 x 10 -6 henry per meter(H/m). 
    • Permittivity of Vacuum 8.85 x 10-12 farad per meter(F/m).



    • Serpentology – Study of Snakes. 
    • Gerontology – Study of growing old. 

    • Unit of Luminous Flux – Lumen 
    • Unit of Magnetic Flux – Weber 



    • Pyreliometer – To measure Solar radiation.
    • Pyrnometer – To measure high temperatures.