Home Basic Chemistry Test Preparation Online Mcqs Basic Chemistry Test Preparation Online Mcqs Basic Chemistry Test Preparation Online Mcqs With Answer Start Below 1234567891011121314151617181920Show paginator Hide paginatorBasic Science 1. Nameplates made of brass get discoloured in air because of the presence of which of the following gases in the air?NitrogenHydrogen sulphideOxygenCarbon dioxideQuestion 1 of 20 Loading... 2. When we move from left to right in second period, the atomic volume of the element?Increases with constant stateNone of theseIncreasesAll of theseQuestion 2 of 20 Loading... 3. Ozone is present in which of the following layers of atmosphere:Troposphere and StratosphereTroposphere and ThermosphereThermosphereMesosphereQuestion 3 of 20 Loading... 4. Atom bomb is based on the principal of?All of theseNuclear fusionNone of theseNuclear fissionQuestion 4 of 20 Loading... 5. Which of the following gases is used in fire extinguishers?Water vapourOxygenCarbon dioxideHydrogenQuestion 5 of 20 Loading... 6. What is the chemical name of Baking Soda?Sodium CarbonateSodium bicarbonateSodium NitratePotassiumQuestion 6 of 20 Loading... 7. Oxidation involves:Loss of electronsCombustionGain in electronGain of hydrogenQuestion 7 of 20 Loading... 8. The reaction taking place at anode and cathode are respectively?None of theseOxidation, reductionReduction, OxidationReduction, hydrolysisQuestion 8 of 20 Loading... 9. Rise in temperature, the conductivity of metals will:None of theseRemains unchangedIncreasesDecreasesQuestion 9 of 20 Loading... 10. Stains of rust from iron on cloth can be removed by:Hydrogen peroxideAlcoholOxalic acidNone of theseQuestion 10 of 20 Loading... 11. Cooking gas is a mixture of which of the following two gases?Oxygen and MethaneBautane and PropaneOxygen and NitrogenMethane and Carbon dioxideQuestion 11 of 20 Loading... 12. When radioactive rays are passed through air or any gas, they cause it to:BoilEvaporateFreezeIonizeQuestion 12 of 20 Loading... 13. In fireworks, the green flame is produced because of:MercuryBarriumSodiumPotassiumQuestion 13 of 20 Loading... 14. Which group of elements in the periodic table show highest first ionization potential. Elements in the:None of theseAll of theseLeft hand top cornerLeft hand bottom cornerQuestion 14 of 20 Loading... 15. In the periodic table, elements have been arranged?None of theseIn order of increasing volumeIn order of increasing atomic numberAll of theseQuestion 15 of 20 Loading... 16. The reason for chlorination of water is:To kill germsTo add mineralsTo add tasteTo propagate germsQuestion 16 of 20 Loading... 17. Generally in a given period in the periodic table, as we move from left to right, the electropositive character of elements:DecreasesNeither increases nor decreasesDecreases then IncreasesIncreasesQuestion 17 of 20 Loading... 18. During electrolysis, metals are deposited at the cathode, because the cathode,None of theseSupplies electronsUndergoes oxidationWithdraw electronsQuestion 18 of 20 Loading... 19. The liberation of energy in sun is due to?All of theseFission reactionFusion reactionNone of theseQuestion 19 of 20 Loading... 20. X-rays are produced when a stream of electrons in an X-ray tube?Hits the glass wall of the tubeNoneof theseAll of theseSrikes metal targetQuestion 20 of 20 Loading... Loading... Related Study Posts:MDCAT Test Chemistry Test Online PreparationASF Written Test Preparation Online McqsOnline ECAT Test Preparation McqsFPSC SST Test Preparation Mcqs OnlinePPSC Lecturer Test Preparation Online McqsTESCO Jobs Online NTS Test Preparation McqsLecturer Test KPPSC Preparation Mcqs OnlineFIA ASI Sub Inspectors Job 2024 OTS Test Preparation…SPSC SST Test Preparation Mcqs Online with SyllabusFPSC Test Preparation Mcqs Online Subject Wise