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