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