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 Which block of elements are known as transition elements? A-block None S_block d-block 2 / 50 The whole universe is made up of almost Hydrogen? 20% 80% 70% 7% 3 / 50 Structural formula of cycloalkane is..... Cn2H5n C8n6Hn8 CnHn CnH2n 4 / 50 Electronic configuration of alkaline earth element is: ns2 ns3 ns6 ns 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 660°C 520°C 320°C 6 / 50 The element that has a giant covalent structure is: silicon (Si) Boron nitride All Diamond 7 / 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? 3.2% 9.2% 4.2% 9.2% 8 / 50 The most reactive allotropic form of phosphorus is: Pink Green Yellow White 9 / 50 skyscraper meaning Ground River Canal Building 10 / 50 Marsh gas is Methene Ethene Methane Ethane 11 / 50 nP2=30 where the value of n? 6 7 5 4 12 / 50 The Celsius scale starts from: 273 𝐾 373 𝐾 32°𝐹 0°𝐶 13 / 50 4.184calories=? 17.89joules 76.89joules 176.89joules 6.89joules 14 / 50 Which of the species is not paramagnetic? Cl- Be+ Ne²+ As+ 15 / 50 Which of the following is similar to electron 𝛽 − rays Photons 𝛼 − rays 𝛾 – rays 16 / 50 Due to the high reactivity nature of the alkali metals, they are found in. Bounded with other elements All of the above Free in nature Not free in nature 17 / 50 Most abundant element in earth's crust is: Si Ni B Ne 18 / 50 The whole universe is made up of almost Hydrogen? 80% 80% 70% 20% 19 / 50 Baking powder is: sodium + tartaric None sodium bicarbonate + sodium tartaric sodium bicarbonate + Potassium tartaric 20 / 50 Carbon atoms of diamond are sp3 hybridized sp hybridized sp7 hybridized sp2 hybridized 21 / 50 Which of the species is not paramagnetic? Ne²+ As+ Cl- Be+ 22 / 50 bond energy of hydrogen(H2)is..... 3kcal/mol. 105.3kcal/mol. 104.3kcal/mol. 4.3kcal/mol. 23 / 50 If an object is lying on a horizontal frictionless surface, and the angle is 90 45 0 60 24 / 50 As the atomic number of the halogen increases, the halogens Become less dense Gain electrons less easily Becomes lighter in color Lose their outermost electrons less easily 25 / 50 The product of the nucleophilic substitution reaction between 2-iodobutane and sodium ethoxide (CH3CH2ONa) is CH2CH2OCHCH2CH3 CH3CH2OCH2CH2CH3 CH3CH2OCH2CH2CH2 CH2CH2CH3 26 / 50 The reaction of an acid and metal carbonate will lead to formation? metal carbonate → salt + water acid + metal carbonate → salt + water acid + metal carbonate → salt + water + carbon dioxide acid + metal carbonate → salt + 27 / 50 Which of the following is a mixture of low-boiling hydrocarbons? Glycerol Ethanol Gasoline Propanoic acid 28 / 50 H2SO4 is a/an: Base Alkaline Acid ACID All of these 29 / 50 What value is the pH of a 10^-10 M NaOH solution closely related to? 5 7 6 8 30 / 50 What is the geometry of an H2S molecule? Bent Rectangular Curve Linear 31 / 50 If a man travel 90km in 1 hour and 40 minutes. He will cover 1km in 1.3min 1.11min 1.2min 1.7min 32 / 50 The property of carbon chain formation is called None Purification Digestion Catenation 33 / 50 Cobalt (Co) has ....... unpaired electrons in its 3d orbital. 6 1 3 8 34 / 50 The most reactive allotropic form of phosphorus is White Pink Green Yellow 35 / 50 Which of the following is more acidic in nature? Cresol Benzene Phenol Aniline 36 / 50 NMR spectroscopy is used for: Studying the dynamics of molecules for Magnetic field None 37 / 50 How many Faradays of electricity are required to remove one mole of AlCl3? 7 8 5 3 38 / 50 which of the following element have unpaired electrons in s subshell Cr Fe Mn Co 39 / 50 Most abundant element in earth's crust is: N Be Si Ni 40 / 50 In 32.5 g of CH4 the percentage of carbon is....... 84.87%. 74.87%. 77.87%. 54.87% 41 / 50 Which organic compound does not undergo the Cannizzaro reaction? α-Hydroxy aldehydes Aldehydes Ketones Aromatic compounds 42 / 50 Cesium and Francium are liquids above 15 o C 20 o C 30 o C 10 o C 43 / 50 What is the chemical formula of wood spirit? C3H8O3 CH4O2 C2H6O CH3OH 44 / 50 Oxidation state of sodium +2 +1 +7 +3 45 / 50 The hydrides which are non stoichiometric in nature are Covalent Complex Interstitial Ionic 46 / 50 The energy obtained from electric cells and batteries as a result of a chemical reaction is called: Potential Energy Electrical Energy None chemical energy 47 / 50 The velocity of photon is: independent of its wavelength independent of its time independent of its mass All 48 / 50 Methylformate and acetic acid are which type of isomers. Functional chain isomers Position isomers Tautomeric 49 / 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 50 / 50 Valency of carbon is: 3 4 6 5 Your score is 0% Restart quiz
