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 When a solution of silver (I) nitrate is saturated with hydrogen sulphide, a black precipitate forms which is HNO3 H2S PbS Ag2S 2 / 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? 3.0 4.0 2.0 5.0 3 / 50 Category: CHEMISTRY POST UTME Pauli exclusion principle is related to quantum numbers of electrons electronegativity values of elements reversibility of equilibrium reactions collision theory of reactions rate 4 / 50 Category: CHEMISTRY POST UTME Which of the following types of reactions takes place between C2H4 and the halogens? Oxidation Addition polymerization Substitution 5 / 50 Category: CHEMISTRY POST UTME Catalytic hydrogenation of benzene produces an aromatic hydrogenation benzene cyclohexane margarine 6 / 50 Category: CHEMISTRY POST UTME The carbon atoms on ethane are Sp2 hybridised SP hybridized SP2d hybridized SP3 hybridised 7 / 50 Category: CHEMISTRY POST UTME Copper metal dissolves in concentrated trioxonitrate (v) acid with the resultant evolution of CO CO2 NO2 SO2 8 / 50 Category: CHEMISTRY POST UTME Lucas reagent is used to test for alkanols amines alkanes alkanoic acids 9 / 50 Category: CHEMISTRY POST UTME The metal extracted from cassiterite is copper calcium tin sodium 10 / 50 Category: CHEMISTRY POST UTME The weakest attractive force that can be observed between two molecules is ionic coordinates van der waals forces covalent 11 / 50 Category: CHEMISTRY POST UTME Organic Chemistry is the branch of Chemistry that deals with ------- and ------ Carbon & Sulphur Hydrogen & oxygen Carbon & Carbon Carbon & Hydrogen 12 / 50 Category: CHEMISTRY POST UTME A mixture of sugar and sulphur can be separated by dissolution in water, evaporation and filtration dissolution in water, filtration and evaporation filtration, evaporation and dissolution in water evaporation, dissolution in water and filtration 13 / 50 Category: CHEMISTRY POST UTME Organic molecules that have the suffix-ene are unsaturated hydrocarbons that have double bond a triple bond a single bond an ionic bond 14 / 50 Category: CHEMISTRY POST UTME Which of the following is not a member of the homologous series of the paraffins? C24H48 C5H12 C3H8 C15H32 15 / 50 Category: CHEMISTRY POST UTME Which of the following properties increases down a group in the Periodic Table electronegativity electron affinity atomic radius ionization energy 16 / 50 Category: CHEMISTRY POST UTME The percentage of water of crystallization in ZnSO4. 7H2O is 55% 33% 44% 87% 17 / 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 25moles 6.25moles 12.5moles 18 / 50 Category: CHEMISTRY POST UTME In the Periodic Table, the elements that lose electrons most readily belong to group IA group IIIA group VIIA group IIA 19 / 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 89 82 72 20 / 50 Category: CHEMISTRY POST UTME Esterification of propane 1, 2, 3-triol and unsaturated higher carboxylic acids will produce soap alkanols methyl propanoate fats 21 / 50 Category: CHEMISTRY POST UTME The greenhouse effect is a climatic condition associated with the presence of excess CO2 NO NH3 H2S 22 / 50 Category: CHEMISTRY POST UTME Cotton is almost pure protein starch animal fibre cellulose 23 / 50 Category: CHEMISTRY POST UTME Which of the following halogens is the most reactive? I2 Cl2 F2 Br2 24 / 50 Category: CHEMISTRY POST UTME An amphoteric oxide is an amorphorous oxide of a non-metal Oxide that is insoluble in water amorphorous oxide of a metal Oxide that behaves as a base as well as an acid 25 / 50 Category: CHEMISTRY POST UTME Calcium atom ionizes by losing two electrons sharing two electrons gaining two electrons gaining two proton 26 / 50 Category: CHEMISTRY POST UTME An element X forms the following compounds with chlorine: XCl4, XCl3, XCl2. This illustrate the law of definite proportions law of chemical proportions law of conservation of mass law of multiple proportions 27 / 50 Category: CHEMISTRY POST UTME The following uses radioactive isotopes except for determining equilibrium positions dating elements tracing reaction paths sterilization of medical equipment 28 / 50 Category: CHEMISTRY POST UTME Which of the following substances increases in mass when heated in air? sodium chloride copper (ii)oxide iodine crystals magnessium ribon 29 / 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 Zig Zag Motion Brownian motion liquefaction evaporation 30 / 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? 18.80dm3 1.88dm3 6.00dm3 60.0dm3 31 / 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 32 / 50 Category: CHEMISTRY POST UTME Which of the following gases can be collected by the method of downward delivery? chlorine oxygen hydrogen ammonia 33 / 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 1.4atm 1.2atm 1.0atm 0.8atm 34 / 50 Category: CHEMISTRY POST UTME Which quantum number divides shells into orbitals? Principal magnetic spin azimuthally 35 / 50 Category: CHEMISTRY POST UTME The major source of oxides of nitrogen is from the burning of chlorofluorocarbons fuel coal wood 36 / 50 Category: CHEMISTRY POST UTME The molecular formula of a common organic laboratory anesthetic is CHF3 CHI3 CHCl3 CCl4 37 / 50 Category: CHEMISTRY POST UTME Element P, Q, R and S have 6, 11, 15 and 16 electrons respectively, therefore, Q will form an electrovalent bond with S P will form an ionic bond with R R will form an electrovalent bond with S Q will form a covalent bond with S 38 / 50 Category: CHEMISTRY POST UTME Alkanals can be differentiated from alkanones by reaction with 2, 4 – dinitrophenylhydrazine sodium hydrogen sulphite Tollen’s reagent hydrogen cyanide 39 / 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 168cm3 100cm3 112cm3 224cm3 40 / 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 41 / 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 6.4g 3.2g 42 / 50 Category: CHEMISTRY POST UTME The principal constituents of natural gas is propane methane ethane butane 43 / 50 Category: CHEMISTRY POST UTME The oxidation number of chlorine is +1in KClO3 ZnCl2 Cl2O7 NaClO 44 / 50 Category: CHEMISTRY POST UTME Which of the following is needed to produce a slag during the extraction of iron in the blast furnace? carbon cryolite sulphur limestone 45 / 50 Category: CHEMISTRY POST UTME What weight of sodium hydroxide is required to make 500cm3 of 0.2M solution? 4g 40g 20g 10g 46 / 50 Category: CHEMISTRY POST UTME Equilibrium is sad to be attained in a reversible reaction when the rate of forward and backward reactions are equal there is no further change in temperature all the reactants have been used up all the products have been formed 47 / 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 methanoic acid and ethylene acetic acid and ethene 48 / 50 Category: CHEMISTRY POST UTME The greenhouse effect is a climatic condition associated with the presence of excess NO H2S CO2 NH3 49 / 50 Category: CHEMISTRY POST UTME Palm wine turns sour with time because the CO2 formed during the fermentation process has a sour taste microbiological activity results in the production of organic acids within it. the sugar content is converted into alcohol it is commonly adulterated by the tappers and sellers 50 / 50 Category: CHEMISTRY POST UTME Which of the following is an acidic salt? CH3CO2Na Na2S NaHSO4 Na2SO4 Your score is 0% Restart quiz