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