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