Chemistry Test 3 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 Celsius scale starts from: 373 𝐾 273 𝐾 32°𝐹 0°𝐶 2 / 50 which of the following element have unpaired electrons in s subshell Co Cr Mn Fe 3 / 50 Cobalt (Co) has ....... unpaired electrons in its 3d orbital. 8 3 1 6 4 / 50 skyscraper meaning Ground River Building Canal 5 / 50 If an object is lying on a horizontal frictionless surface, and the angle is 45 60 90 0 6 / 50 The reaction of an acid and metal carbonate will lead to formation? metal carbonate → salt + water acid + metal carbonate → salt + water acid + metal carbonate → salt + water + carbon dioxide acid + metal carbonate → salt + 7 / 50 The most reactive allotropic form of phosphorus is Pink White Yellow Green 8 / 50 Most abundant element in earth's crust is: Ni Be Si N 9 / 50 How many Faradays of electricity are required to remove one mole of AlCl3? 7 5 3 8 10 / 50 NMR spectroscopy is used for: None for Magnetic field Studying the dynamics of molecules 11 / 50 Cesium and Francium are liquids above 20 o C 10 o C 15 o C 30 o C 12 / 50 nP2=30 where the value of n? 5 7 6 4 13 / 50 The velocity of photon is: independent of its time independent of its mass All independent of its wavelength 14 / 50 The property of carbon chain formation is called Digestion Purification Catenation None 15 / 50 The most reactive allotropic form of phosphorus is: Pink Yellow White Green 16 / 50 Carbon atoms of diamond are sp hybridized sp2 hybridized sp3 hybridized sp7 hybridized 17 / 50 The whole universe is made up of almost Hydrogen? 80% 20% 80% 70% 18 / 50 Oxidation state of sodium +1 +7 +2 +3 19 / 50 Due to the high reactivity nature of the alkali metals, they are found in. All of the above Not free in nature Free in nature Bounded with other elements 20 / 50 Most abundant element in earth's crust is: Ne B Ni Si 21 / 50 The product of the nucleophilic substitution reaction between 2-iodobutane and sodium ethoxide (CH3CH2ONa) is CH2CH2OCHCH2CH3 CH2CH2CH3 CH3CH2OCH2CH2CH2 CH3CH2OCH2CH2CH3 22 / 50 What is the chemical formula of wood spirit? CH3OH C2H6O C3H8O3 CH4O2 23 / 50 What value is the pH of a 10^-10 M NaOH solution closely related to? 8 6 5 7 24 / 50 Methylformate and acetic acid are which type of isomers. Functional Tautomeric Position isomers chain isomers 25 / 50 Find the temperature at which the rate of effusion of N₂ is 1.625 times to that of SO₂ at 500°C 660°C 620°C 520°C 320°C 26 / 50 The whole universe is made up of almost Hydrogen? 20% 70% 80% 7% 27 / 50 The energy obtained from electric cells and batteries as a result of a chemical reaction is called: chemical energy None Potential Energy Electrical Energy 28 / 50 In 32.5 g of CH4 the percentage of carbon is....... 84.87%. 54.87% 74.87%. 77.87%. 29 / 50 The element that has a giant covalent structure is: Boron nitride All silicon (Si) Diamond 30 / 50 Find the fraction of the total pressure exerted by hydrogen if it is mixed with ethane in an empty container at 25°C. 15/18 17/16 15/16 32/16 31 / 50 Which of the species is not paramagnetic? Ne²+ Cl- Be+ As+ 32 / 50 H2SO4 is a/an: ACID Alkaline Acid Base All of these 33 / 50 Which block of elements are known as transition elements? S_block d-block None A-block 34 / 50 4.184calories=? 17.89joules 176.89joules 76.89joules 6.89joules 35 / 50 Electronic configuration of alkaline earth element is: ns6 ns ns3 ns2 36 / 50 Which of the following is more acidic in nature? Benzene Phenol Cresol Aniline 37 / 50 If the density of a cube is determined by measuring the mass and length of its side, and the maximum error in measurement of mass and length is 3% and 2% respectively, what will be the maximum error in the measurement of density? 9.2% 9.2% 3.2% 4.2% 38 / 50 Structural formula of cycloalkane is..... C8n6Hn8 Cn2H5n CnHn CnH2n 39 / 50 As the atomic number of the halogen increases, the halogens Gain electrons less easily Lose their outermost electrons less easily Become less dense Becomes lighter in color 40 / 50 Baking powder is: None sodium bicarbonate + Potassium tartaric sodium + tartaric sodium bicarbonate + sodium tartaric 41 / 50 Marsh gas is Ethane Methane Ethene Methene 42 / 50 What is the geometry of an H2S molecule? Linear Curve Rectangular Bent 43 / 50 Valency of carbon is: 6 3 4 5 44 / 50 bond energy of hydrogen(H2)is..... 4.3kcal/mol. 3kcal/mol. 104.3kcal/mol. 105.3kcal/mol. 45 / 50 Which organic compound does not undergo the Cannizzaro reaction? Aldehydes Aromatic compounds α-Hydroxy aldehydes Ketones 46 / 50 If a man travel 90km in 1 hour and 40 minutes. He will cover 1km in 1.11min 1.7min 1.2min 1.3min 47 / 50 Which of the following is similar to electron 𝛽 − rays Photons 𝛾 – rays 𝛼 − rays 48 / 50 The hydrides which are non stoichiometric in nature are Ionic Covalent Interstitial Complex 49 / 50 Which of the species is not paramagnetic? Be+ As+ Ne²+ Cl- 50 / 50 Which of the following is a mixture of low-boiling hydrocarbons? Propanoic acid Gasoline Glycerol Ethanol Your score is 0% Restart quiz
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