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