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