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