Basic Chemistry important objective questions | SBTE Board(Bihar) Examination

All Bihar Polytechnic students should be read the objective questions. Because the given objective questions are quite important for preparation of diploma exam. We are trying our best for your future. In the upcoming time, studying will become important and easy for you.

• The number of nodes for 4d orbital is - 3(three)
• The number of angular nodes for 4d orbital is - 2(two)
• The number of spherical nodes for 4d orbital - 2(two)
• The number of orbital associated with 2nd shell - 4 (orbital)
• The presence of 5 unpaired electrons in a d-orbital can be explained by - Hund's Rule
• The isotopes of Hydrogen - Protium, Deuterium & Tritium
• The no. of radial nodes for 3p orbital - 1(one)
• The number of Orbital associated with 3rd shell - 9 (Nine)
• How many elements are accommodated in 6th period - 32
• The example of ionic compound - NaCl, KCl, HCl, MgCl2 , AlCl3
• The number of Pi and Sigma bonds in Benzene - 3Pi + 12 Sigma
• What is the shape of methane molecules - Tetrahedral
• The number of radial nodes for 2p orbital - 0 (Zero)
• What is the shape of water molecules - Angular
• The atom which has no neutron - Hydrogen
• The most electronegative atom is - Fluorine
• The molecule which has covalent bond - O2, H2O, Cl2, N2
• The number of Pi bonds in acetylene - 2 (two)
• The quantity of charge required to obtain 1 mole of Al from Al2O3 is - 3F (Farad) = 3 × 96500C
• Faraday's law of electrolysis is related to - Equivalent weight of Electrolytes
• Example of primary cell - Daniel cell, Dry cell, Mercury cell, Alkaline cell etc. 
• Example of secondary cell - Lead storage battery, NICKEL storage battery. 
• Chemical used in Photography - AgBr
• The compound used in s refrigerant - CCl2F2
• In an aqueous solution hydrogen will not reduce - Cu²+ 
• Bhopal gas tragedy took place because methyl isocyanate reacted with - NH2
• In Daniel cell, when Zn and Cu electrode are connected, the current flow from - Zn to Cu outside the cell
• In salt bridge KCl is used because - The Ionic molality of K+ & Cl- is approximately equal
• In the electrolysis, the phenomena that occurs at cathode - Reduction
• In the electrolysis, the phenomena that occurs at anode - Oxidation
• During the electrolysis the pure metal is deposited at - cathode 
• In blast furnace ferric oxide reduce by - Carbon
• Which metal is used for welding - Ferrous and Aluminum oxide
• Cl^35 and Cl^ 37 are - Isotopes
• Brass is mixture of - Cu & Zn. 
• Bronze is the mixture of - Cu + Sn. 
• German silver is mixture of - Cu + Sn + Ni
• Ores of Iron - Magnetite, Hematite, Siderite, Limonite
• Azurite is ores of - Copper (Cu)
• The purest form of iron - wrought iron 
• Most suitable metal for permanent magnet - Steel
• Chemical used in photography - AgBr
• Teflon is polymer of - Polytetrafluoroethylene (PTFE)
• HCl has __ bond - Ionic Bond
• Which is used for construct Salt Bridge - KCl, KNO3, NH4NO3
• Example of condensation polymerisation - Bakelite, Nylon 6 , Nylon 66. 
• Example of additional polymerisation - PVC , Polyethylene, Buna-S, Polystyrene. 
• Ingredient of plastic - Resin, fillers, Plasticeer etc. 
• Which of the most abundant gas in atmosphere - Nitrogen
• Which of the most abundant gas in earth crust - Aluminum
• Fused NaCl conduct electricity because - free ions 
• If the value of BOD is less than 5, that indicate - Rich Oxygen dissolve
• Who is the resist ultraviolet Ray's coming from the Sun - O3
• Main cause of acid rain - Sulphur
• Lime Stone is __ ores. - Carbonates ores
• ___ is green house gas - O3, CH4, H2O vapour.
• Vulcanisation makes rubber ___ .- More stiff
• The lowest layer of Earth's atmosphere - Toposphere
• Which is the secondary source of pollution - Acid rain, ozone depletion. 
• Most poisonus pollutant in water - Arsenic

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