CHEMISTRY POST UTME QUESTIONS & ANSWERS HomePOST UTME/POST JAMB Past Question & AnswersCHEMISTRY POST UTME QUESTIONS & ANSWERS Practice this CHEMISTRY POST UTME exam questions and answers Our experts have provided correct answers to these questions. 0% CHEMISTRY POST UTME (APP) CHEMISTRY POST UTME CHEMISTRY POST UTME Practice with our Post UTME CBT for Universities, Polytechnics, College of Agriculture, College of Medicine, College of Technology and College of Education and pass your examination. 1 / 50 Category: CHEMISTRY POST UTME A current of 4.0 amperes was passed through copper (II) tetraoxosulphate (IV) solution for one hour using copper electrodes. What was the mass of copper deposited? (Cu =64, IF = 96500C) 96 4.8g 3.2g 6.4g 2 / 50 Category: CHEMISTRY POST UTME The molecular formula of a common organic laboratory anesthetic is CHCl3 CHI3 CHF3 CCl4 3 / 50 Category: CHEMISTRY POST UTME A mixture of sugar and sulphur can be separated by filtration, evaporation and dissolution in water dissolution in water, filtration and evaporation evaporation, dissolution in water and filtration dissolution in water, evaporation and filtration 4 / 50 Category: CHEMISTRY POST UTME The following are uses of sulphur except coating of steel to prevent rusting manufacture of dyes vulcanization of rubber manufacture of tetraoxosulphate (VI) acid 5 / 50 Category: CHEMISTRY POST UTME Alkanals can be differentiated from alkanones by reaction with sodium hydrogen sulphite hydrogen cyanide Tollen’s reagent 2, 4 – dinitrophenylhydrazine 6 / 50 Category: CHEMISTRY POST UTME Which of the following is needed to produce a slag during the extraction of iron in the blast furnace? sulphur limestone cryolite carbon 7 / 50 Category: CHEMISTRY POST UTME The greenhouse effect is a climatic condition associated with the presence of excess H2S NH3 NO CO2 8 / 50 Category: CHEMISTRY POST UTME Catalytic hydrogenation of benzene produces cyclohexane margarine benzene an aromatic hydrogenation 9 / 50 Category: CHEMISTRY POST UTME The greenhouse effect is a climatic condition associated with the presence of excess H2S NO CO2 NH3 10 / 50 Category: CHEMISTRY POST UTME Which of the following types of reactions takes place between C2H4 and the halogens? Oxidation Addition polymerization Substitution 11 / 50 Category: CHEMISTRY POST UTME The principal constituents of natural gas is ethane methane propane butane 12 / 50 Category: CHEMISTRY POST UTME A gaseous mixture of 80.0g of oxygen and 56.0g of nitrogen has a total pressure of 1.8atm. The partial pressure of oxygen in the mixture is 0.8atm 1.4atm 1.2atm 1.0atm 13 / 50 Category: CHEMISTRY POST UTME Given that the molecular mass of iron is 56 and that of oxygen is 16, how many moles of iron (III) oxide will be contained in 1kg of the compound? 0.625moles 12.5moles 6.25moles 25moles 14 / 50 Category: CHEMISTRY POST UTME Esterification of propane 1, 2, 3-triol and unsaturated higher carboxylic acids will produce alkanols fats methyl propanoate soap 15 / 50 Category: CHEMISTRY POST UTME What weight of sodium hydroxide is required to make 500cm3 of 0.2M solution? 40g 10g 4g 20g 16 / 50 Category: CHEMISTRY POST UTME The oxidation number of chlorine is +1in ZnCl2 Cl2O7 KClO3 NaClO 17 / 50 Category: CHEMISTRY POST UTME Equilibrium is sad to be attained in a reversible reaction when all the reactants have been used up the rate of forward and backward reactions are equal all the products have been formed there is no further change in temperature 18 / 50 Category: CHEMISTRY POST UTME Element P, Q, R and S have 6, 11, 15 and 16 electrons respectively, therefore, P will form an ionic bond with R Q will form a covalent bond with S R will form an electrovalent bond with S Q will form an electrovalent bond with S 19 / 50 Category: CHEMISTRY POST UTME Cotton is almost pure protein cellulose animal fibre starch 20 / 50 Category: CHEMISTRY POST UTME Calcium atom ionizes by gaining two proton gaining two electrons losing two electrons sharing two electrons 21 / 50 Category: CHEMISTRY POST UTME Which of the following is not a member of the homologous series of the paraffins? C24H48 C5H12 C15H32 C3H8 22 / 50 Category: CHEMISTRY POST UTME The weakest attractive force that can be observed between two molecules is coordinates covalent van der waals forces ionic 23 / 50 Category: CHEMISTRY POST UTME Which of the following gases can be collected by the method of downward delivery? chlorine hydrogen oxygen ammonia 24 / 50 Category: CHEMISTRY POST UTME Which quantum number divides shells into orbitals? magnetic spin Principal azimuthally 25 / 50 Category: CHEMISTRY POST UTME 3.0g of a mixture of potassium carbonate and potassium chloride were dissolved in a 250cm3 standard flask.25cm3 of this solution required 40.00cm3 of 0.01M HCl for neutralization. What is the percentage by weight of k2CO3 in the mixture? (k = 39, O = 16, C = 12) 92 82 72 89 26 / 50 Category: CHEMISTRY POST UTME The following uses radioactive isotopes except for determining equilibrium positions tracing reaction paths sterilization of medical equipment dating elements 27 / 50 Category: CHEMISTRY POST UTME An element X forms the following compounds with chlorine: XCl4, XCl3, XCl2. This illustrate the law of multiple proportions law of definite proportions law of conservation of mass law of chemical proportions 28 / 50 Category: CHEMISTRY POST UTME When a solution of silver (I) nitrate is saturated with hydrogen sulphide, a black precipitate forms which is PbS H2S HNO3 Ag2S 29 / 50 Category: CHEMISTRY POST UTME Which of the following is an acidic salt? Na2S CH3CO2Na NaHSO4 Na2SO4 30 / 50 Category: CHEMISTRY POST UTME The movement of liquid molecules from the surface of the liquid to the gaseous phase above it is known as liquefaction Zig Zag Motion Brownian motion evaporation 31 / 50 Category: CHEMISTRY POST UTME Lucas reagent is used to test for alkanols alkanoic acids amines alkanes 32 / 50 Category: CHEMISTRY POST UTME The IUPAC names for the compounds CH3COOH and CH2 = CH2 are respectively; ethanoic acid and ethene acetic acid and ethane acetic acid and ethene methanoic acid and ethylene 33 / 50 Category: CHEMISTRY POST UTME Copper metal dissolves in concentrated trioxonitrate (v) acid with the resultant evolution of CO2 NO2 CO SO2 34 / 50 Category: CHEMISTRY POST UTME Organic molecules that have the suffix-ene are unsaturated hydrocarbons that have a triple bond a single bond an ionic bond double bond 35 / 50 Category: CHEMISTRY POST UTME Which of the following halogens is the most reactive? I2 Cl2 Br2 F2 36 / 50 Category: CHEMISTRY POST UTME Which of the following properties increases down a group in the Periodic Table electron affinity ionization energy electronegativity atomic radius 37 / 50 Category: CHEMISTRY POST UTME The following are uses of sulphur except manufacture of dyes coating of steel to prevent rusting manufacture of tetraoxosulphate (VI) acid vulcanization of rubber 38 / 50 Category: CHEMISTRY POST UTME Which of the following substances increases in mass when heated in air? iodine crystals sodium chloride copper (ii)oxide magnessium ribon 39 / 50 Category: CHEMISTRY POST UTME The major source of oxides of nitrogen is from the burning of fuel coal wood chlorofluorocarbons 40 / 50 Category: CHEMISTRY POST UTME Pauli exclusion principle is related to collision theory of reactions rate electronegativity values of elements reversibility of equilibrium reactions quantum numbers of electrons 41 / 50 Category: CHEMISTRY POST UTME The percentage of water of crystallization in ZnSO4. 7H2O is 44% 55% 87% 33% 42 / 50 Category: CHEMISTRY POST UTME The carbon atoms on ethane are Sp2 hybridised SP3 hybridised SP hybridized SP2d hybridized 43 / 50 Category: CHEMISTRY POST UTME Organic Chemistry is the branch of Chemistry that deals with ------- and ------ Carbon & Sulphur Carbon & Carbon Hydrogen & oxygen Carbon & Hydrogen 44 / 50 Category: CHEMISTRY POST UTME The metal extracted from cassiterite is sodium calcium copper tin 45 / 50 Category: CHEMISTRY POST UTME 0.0075 mole of calcium trioxocarbonate (iv) is added to 0.015 mole of a solution of HCl. The volume of gas evolved at S.T.P is 100cm3 224cm3 112cm3 168cm3 46 / 50 Category: CHEMISTRY POST UTME Palm wine turns sour with time because it is commonly adulterated by the tappers and sellers microbiological activity results in the production of organic acids within it. the sugar content is converted into alcohol the CO2 formed during the fermentation process has a sour taste 47 / 50 Category: CHEMISTRY POST UTME An amphoteric oxide is an Oxide that is insoluble in water Oxide that behaves as a base as well as an acid amorphorous oxide of a non-metal amorphorous oxide of a metal 48 / 50 Category: CHEMISTRY POST UTME In the Periodic Table, the elements that lose electrons most readily belong to group VIIA group IA group IIA group IIIA 49 / 50 Category: CHEMISTRY POST UTME At 25oC and 1atm, a gas occupies a volume of 1.50dm3. What volume will it occupy at 100 oC and 1atm? 1.88dm3 18.80dm3 6.00dm3 60.0dm3 50 / 50 Category: CHEMISTRY POST UTME 0.499g of CuSO4.XH2O when heated to constant weight gave a residue of 0.346g. What is the value of X? 4.0 5.0 2.0 3.0 Your score is 0% Restart quiz