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General Science Bites: Chemistry for Railway & SSC Exams

General Science Bites: Chemistry for Railway & SSC Exams

General Science Bites: Chemistry for Railway & SSC Exams

As you already know we have released 1 PDF MCQ Questions Bank for Railway Exams 2018. From Today onwards we will start a series of RAILWAY & SSC Exams. As per candidates requests those who are facing Issues with general science. In market no such books are available (SPEEDY General Science in English) now for general science. So, Now onwards we will cover each section regularly. If you like this Oneliner General Science Bites: Chemistry for Railway & SSC Exams 2018 then just comment us we will continue this series. 

  • Lavoisier is the father of modern Chemistry. 
  • A pure substance can only be a compound or element. 
  • NaCl has same equivalent weight and molecular weight.
  • Aluminium is the most abundant material in the earth’s crust. 
  • An alloy is a mixture. 
  • Einstein is the scientist who stated that the matter can be converted into energy. 
  • Sodium Carbonate crystals lose water molecules. This property is called as Efflorescence. 
  • The law of constant proportions were given by Proust.
  • The best standard of Atomic Mass is Carbon-12. 
  • 1 AMU is equal to 1.66 * 10^ (-24) g. 
  • The substance that is composed of two different elements in fixed proportion by mass is called as Compound. 
  • Milk and Air both are mixture in nature. 
  • Sodium is the pure element. 
  • The product of equivalent weight and valency of an element is equal to atomic weight. 
  • Diamond is an element. 
  • Avogadro’s law directly explains the law of conservation of mass. 
  • The M.K.S system was first introduced by Giorgi. 
  • The mixture of sand and naphthalene can be separated by Sublimation. 
  • In known elements, there are maximum metals in numbers. 
  • Bar is a unit of Pressure. 
  • “Misch Metal” is widely used in manufacture of Cigarette lighters. 
  • Oxygen and Ozone are Allotropes. 
  • Glass does not have a melting point. 
  • 1 mole of Sodium atom is heaviest. 
  • Lead is the poorest conductor of heat. 
  • C, O, N, H are present in Urea. 
  • Law of Multiple Proportion explains the formation of carbon monoxide and carbon-di-oxide from Carbon and Oxygen. 
  • Dalton proposed that the atoms are indivisible. 
  • Cathode rays are stream of Electrons. 
  • Neutron does not carry any charge. It was discovered by Chadwick. 
  • The three basic components of an atom are Protons, Neutrons and Electrons. 
  • The absolute value of charge on electron was determined by R.A. Millikan. 
  • Rutherford’s α-scattering experiment is related to the size of Nucleus.
  • The word “insolation” means incoming Solar Radiation. 
  • Atoms are composed of Electrons and Nuclei. 
  • Atomic Number of an element is a whole number. 
  • Isotopes of atoms of same element have same number of protons. 
  • Nucleons are Protons and Neutrons.
  • Discovery of a nucleus of an atom was due to the experiment carried out by Rutherford.
  •  Neutrino has 0 charge and 0 mass. 
  • Electromagnetic Radiation with maximum wavelength is known as the Radio Waves. 
  • The value of Plank’s Constant is 6.62 * 10 ^ (-34) JS. 
  • The concept of Dual nature of radiation was proposed by de-Broglie. 
  • According to the Pauli’s Exclusion Principle, in a given atom, no two electrons can have the same value for all the four quantum number. 
  • The atomic orbital is the region in which there is maximum probability of finding electrons. 
  • Tritium is an isotope (Radioactive) of Hydrogen. 
  • Meson was discovered by Yukawa. 
  • Mesons are responsible for holding all nucleons together.
  • Cathode rays can be deflected by magnetic field and electric field. 
  • Structure of solids is investigated by using X-rays. 
  • The constituent particles of a nucleus are neutron and proton. 
  • In an atom, the order of filling up of the orbital is governed by Aufbau Principle. 
  • Cosmic Rays have highest frequency. 
  • Infrared rays have the longest wavelength. 
  • Gamma rays are emitted by the radioactive substances. 
  • Propagation of light quanta may be described by the Photons. 
  • The experiment of Michelson and Morley proved that the speed of light is always same. 
  • The atoms of the elements having same mass number but different atomic numbers are called isobars. 
  • Species containing same number of electrons are known as Isoelectronic. 
  • The atoms of elements having same number of neutrons are called as Isotones. 
  • The phenomenon of radioactivity was discovered by Henry Bacquerel. 
  • The α particles are double positively charged helium nuclei. 
  • Heavy water is used as the coolant in nuclear reactors.  Heavy water is water containing the heavy isotope of hydrogen. The speed of neutrons is slowed down by it in nuclear reactors.
  • Beta Particle is similar to electron. 
  • Gamma Rays are high energy electromagnetic. 
  • G. M Counter is used for measuring radioactivity. 
  • Gamma Rays are most harmful for human body. 
  • Group Displacement Law was given by Soddy and Fajan. 
  • Nuclear Fission is caused by the impact of protons. 
  • When the nucleus of Uranium is bombarded with neutrons, it breaks up into nuclei of nearly equal mass. This process is known as Nuclear Fission. 
  • Hydrogen Bomb are based on the principle of Nuclear Fusion. 
  • The fuel in atomic pile is Uranium. 
  • Energy produced in nuclear reaction is given by Einstein’s Law. 
  • In Atomic Reactors, graphite is used as Moderator. 
  • Cobalt-60 is used in the treatment of Cancer as it emits Gamma rays. 
  • In Nuclear Reactor, the Chain Reaction is controlled by introducing Cadmium Rod. 
  • The heaviest naturally occurring element is Uranium. 
  • Scintillation Counter is used to confirm whether drinking water consists of a gamma emitting isotope or not. 
  • Yellow Cake is an item of smuggling across border. It is Uranium Oxide. 
  • Ziroconium is essential for the construction in nuclear reactors. 
  • Formation of cation occurs by loss of electrons.

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