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