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