Chemistry Test 2 Please don't use any search browser to find the answer. Just do it yourself so you can measure your knowledge power. Best of Luck! Please! Enter Password 1 / 50 The chemical formula of camphor is C3H4O C10H16O CHO C8H6O 2 / 50 The pollutant which play an important role in smog formation CO H2 S NH 3 All of these 3 / 50 The yellow color in photochemical smog is due to presence of _______ Nitrogen dioxide Carbon dioxide Chlorine gas None 4 / 50 The most reactive allotropic form of phosphorus is Yellow Green Pink White 5 / 50 Which of the following sulphates is not soluble in water? Sodium sulphate Barium sulphate Potassium sulphate Zinc sulphate 6 / 50 Which of the following elements react with steam to produce H2 gas? All of the above Sn Ni Pd 7 / 50 __________is study about energy of a chemical system None Organichemistry thermochemistry Biochemistry 8 / 50 The whole universe is made up of almost Hydrogen? 70% 20% 80% 80% 9 / 50 Mass of sodium in 53 g of Na2CO3 is 46 g 92 g 23 g 106 g 10 / 50 Unit of dipole moment is.? m-2 m-3 m-7 m-4 11 / 50 Under what category can a floor cleaning agent that serves to make floors bacteria-free be placed: All Alcohol Bleach Disinfectant 12 / 50 Which one of the following is an incorrect statement? The ionization potential of nitrogen is greater than that of chlorine The electronegativity of fluorine is greater than that of chlorine. The electron affinity of fluorine is greater than that of chlorine he ionization potential of beryllium is greater than that of boron 13 / 50 which molecule or structure does not contain three atoms bonded at an angle between 109° and 110°? Ethylene (C2H4) Methane (CH4) All Graphite. 14 / 50 Which of the following is a mixture of low-boiling hydrocarbons? Propanoic acid Glycerol Gasoline Ethanol 15 / 50 How many Faradays of electricity are required to remove one mole of AlCl3? 5 7 3 8 16 / 50 ______ classified the then known elements into metals, non metals and their derivatives Dobreiner Al – Razi Mendeleeve Newlands 17 / 50 Chile saltpeter had the chemical formula Na 2 B4 O7 Na2 CO3 H 2 O NaNO 3 KNO3 18 / 50 Valency of carbon is: 8 2 6 4 19 / 50 The hydrogen, which is present in the atmosphere of sun and stars in a large amount, is H 2 H3 H - H 20 / 50 Find the temperature at which the rate of effusion of N₂ is 1.625 times to that of SO₂ at 500°C 620°C 520°C 720°C 690°C 21 / 50 Elements with seven electrons in their valence shell are known as Halogens Inert Lanthanides Alkali metals 22 / 50 In the periodic table each period begins with a metal, which is Less electronegative Less electropositive Most electronegative Most electropositive 23 / 50 MASS of sulpher is....... 32g 23g 72g 92g 24 / 50 Cesium and Francium are liquids above 20 o C 30 o C 15 o C 10 o C 25 / 50 UV radiation from the sun causes a reaction that produces O3 SO2 Flourides CO 26 / 50 As the atomic number of the halogen increases, the halogens Gain electrons less easily Lose their outermost electrons less easily Become less dense Becomes lighter in color 27 / 50 Which organic compound does not undergo the Cannizzaro reaction? Aromatic compounds Ketones α-Hydroxy aldehydes Aldehydes 28 / 50 Seventh period consists of……………….normal elements? 3 4 2 8 29 / 50 Find the temperature at which the rate of effusion of N₂ is 1.625 times to that of SO₂ at 500°C 620°C 520°C 820°C 690°C 30 / 50 The hydrides which are non stoichiometric in nature are Complex Covalent Interstitial Ionic 31 / 50 The total number of bonds in CaC2 is: two sigma bond and one pi bonds One sigma bond and two pi bonds two sigma bond and two pi bonds One sigma bond and one pi bonds 32 / 50 What value is the pH of a 10^-10 M NaOH solution closely related to? 5 3 5 7 33 / 50 The process in solid waste is burnt at high temperature ranging from 900 to 1000 o C Ozonation Incineration All of these Chlorination 34 / 50 Environmental pollution affects Man only Biotic and abiotic components of environment Plants only Biotic components 35 / 50 1 mole of hydrogen contains ....... 1g of hydrogen 7g of hydrogen 2g of hydrogen 4g of hydrogen 36 / 50 The mass of one mole of electron is 0.054 mg 1.008 mg 0.184 mg 0.54 mg 37 / 50 Which of the following factors help to measure quality of water? COD All of the above BOD DO 38 / 50 The mass of 0.5 mole of Aluminum iS 13 g 27 g 14 g 13.5 g 39 / 50 The alkali metals, which have radioactive isotopes Li K Na K and Rb 40 / 50 The ionic halides in order of decreasing m.p and b.p can be arranges as Iodide>bromide>chloride> fluoride Chloride>bromide>iodide>fluoride Fluoride>chloride>bromide>iodide Bromide>chloride>fluoride>iodide 41 / 50 Lead is Radioactive pollutant Soil pollutant Noise pollutan Air pollutant 42 / 50  Which one of the following makes the bulk of hydrosphere’s content? Fresh water lakes and ponds Oceans Glaciers & ice All have equal distribution 43 / 50 Ozone is located in Thermosphere Mesosphere Troposphere Stratosphere 44 / 50 Disease caused by eating fish in water contaminated with industrial waste having mercury Arthritis Hashmitos disease Minamat disease Brights dieses 45 / 50 Fish die in water bodies polluted by sewage due to Pathogens Clogging of gills by silt Reduction in oxygen Foul smell 46 / 50 The element that has a giant covalent structure is Silicon dioxide (silica) All Graphite silicon (Si) 47 / 50 In H2O, ........ hybridization is present. Sp4 Sp3 Sp Sp2 48 / 50 The components of lithosphere are All of these Organic matter of earth crust Mineral of earth crust Soil 49 / 50 Ionization energy is lowest for Inert gases Alkali metals Alkaline earth metals Halogens 50 / 50 The pH range of acid rain is 6.5 – 7 5 – 7 6 – 8 Less than 5 Your score is 0% Restart quiz
