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