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