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