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