General Science for Railway Exams Flashcards
Physics, chemistry and biology facts for RRB exams.
- Seven SI base units
- metre, kilogram, second, ampere, kelvin, mole, candela.
- SI unit of force
- Newton (N).
- SI unit of work / energy
- Joule (J).
- SI unit of power
- Watt (W).
- SI unit of pressure
- Pascal (Pa).
- SI unit of frequency
- Hertz (Hz).
- SI unit of electric charge
- Coulomb (C).
- SI unit of resistance
- Ohm (Ω).
- SI unit of electric potential
- Volt (V).
- SI unit of capacitance
- Farad (F).
- SI unit of magnetic flux
- Weber (Wb).
- SI unit of luminous intensity
- Candela (cd).
- Vitamin A (Retinol)
- Deficiency: night blindness.
- Vitamin B1 (Thiamine)
- Deficiency: beriberi.
- Vitamin B3 (Niacin)
- Deficiency: pellagra.
- Vitamin B9 (Folic acid)
- Deficiency: megaloblastic anaemia; neural tube defects in newborns.
- Vitamin B12 (Cobalamin)
- Deficiency: pernicious anaemia.
- Vitamin C (Ascorbic acid)
- Deficiency: scurvy.
- Vitamin D (Calciferol)
- Deficiency: rickets in children, osteomalacia in adults.
- Vitamin K
- Needed for blood clotting; deficiency causes excessive bleeding.
- Fat-soluble vitamins
- A, D, E and K.
- Iodine deficiency
- Goitre.
- Iron deficiency
- Anaemia.
- Kwashiorkor vs Marasmus
- Kwashiorkor: protein deficiency.
Marasmus: protein and calorie deficiency. - Baking soda
- Sodium bicarbonate – NaHCO₃.
- Washing soda
- Sodium carbonate decahydrate – Na₂CO₃·10H₂O.
- Common salt
- Sodium chloride – NaCl.
- Bleaching powder
- Calcium oxychloride – CaOCl₂.
- Plaster of Paris
- CaSO₄·½H₂O.
- Gypsum
- CaSO₄·2H₂O.
- Quicklime
- Calcium oxide – CaO.
- Slaked lime
- Calcium hydroxide – Ca(OH)₂.
- Limestone / Marble
- Calcium carbonate – CaCO₃.
- Laughing gas
- Nitrous oxide – N₂O.
- Dry ice
- Solid carbon dioxide – CO₂.
- Blue vitriol
- Copper sulphate – CuSO₄·5H₂O.
- Green vitriol
- Ferrous sulphate – FeSO₄·7H₂O.
- Caustic soda
- Sodium hydroxide – NaOH.
- Heavy water
- Deuterium oxide – D₂O.
- Bones in an adult human
- 206.
- Largest bone
- Femur (thigh bone).
- Smallest bone
- Stapes (in the middle ear).
- Largest organ
- Skin.
- Largest gland
- Liver.
- Longest cell
- Neuron (nerve cell).
- Normal body temperature
- 37 °C (98.6 °F).
- Life span of red blood cells
- About 120 days.
- pH of human blood
- About 7.4 (slightly alkaline).
- Universal blood donor / recipient
- Donor: O negative
Recipient: AB positive - Normal blood pressure
- 120/80 mmHg.
- Insulin is secreted by
- Beta cells of the Islets of Langerhans in the pancreas.