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