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 PbS Ag2S HNO3 H2S 2 / 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) 3.2g 4.8g 96 6.4g 3 / 50 Category: CHEMISTRY POST UTME The principal constituents of natural gas is methane propane butane ethane 4 / 50 Category: CHEMISTRY POST UTME The following are uses of sulphur except coating of steel to prevent rusting manufacture of tetraoxosulphate (VI) acid vulcanization of rubber manufacture of dyes 5 / 50 Category: CHEMISTRY POST UTME Copper metal dissolves in concentrated trioxonitrate (v) acid with the resultant evolution of NO2 CO2 SO2 CO 6 / 50 Category: CHEMISTRY POST UTME A mixture of sugar and sulphur can be separated by evaporation, dissolution in water and filtration filtration, evaporation and dissolution in water dissolution in water, filtration and evaporation dissolution in water, evaporation and filtration 7 / 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) 72 89 82 92 8 / 50 Category: CHEMISTRY POST UTME The carbon atoms on ethane are Sp2 hybridised SP2d hybridized SP hybridized SP3 hybridised 9 / 50 Category: CHEMISTRY POST UTME Calcium atom ionizes by sharing two electrons gaining two electrons losing two electrons gaining two proton 10 / 50 Category: CHEMISTRY POST UTME Which of the following substances increases in mass when heated in air? copper (ii)oxide iodine crystals magnessium ribon sodium chloride 11 / 50 Category: CHEMISTRY POST UTME The weakest attractive force that can be observed between two molecules is coordinates van der waals forces covalent ionic 12 / 50 Category: CHEMISTRY POST UTME Alkanals can be differentiated from alkanones by reaction with Tollen’s reagent hydrogen cyanide 2, 4 – dinitrophenylhydrazine sodium hydrogen sulphite 13 / 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 1.0atm 1.4atm 0.8atm 1.2atm 14 / 50 Category: CHEMISTRY POST UTME Which of the following is not a member of the homologous series of the paraffins? C3H8 C15H32 C24H48 C5H12 15 / 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? 60.0dm3 18.80dm3 6.00dm3 1.88dm3 16 / 50 Category: CHEMISTRY POST UTME Catalytic hydrogenation of benzene produces cyclohexane benzene an aromatic hydrogenation margarine 17 / 50 Category: CHEMISTRY POST UTME In the Periodic Table, the elements that lose electrons most readily belong to group IIIA group IIA group IA group VIIA 18 / 50 Category: CHEMISTRY POST UTME Which of the following halogens is the most reactive? I2 Br2 Cl2 F2 19 / 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 R will form an electrovalent bond with S Q will form an electrovalent bond with S Q will form a covalent bond with S 20 / 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 chemical proportions law of conservation of mass law of definite proportions 21 / 50 Category: CHEMISTRY POST UTME Lucas reagent is used to test for alkanoic acids alkanes amines alkanols 22 / 50 Category: CHEMISTRY POST UTME The oxidation number of chlorine is +1in ZnCl2 KClO3 NaClO Cl2O7 23 / 50 Category: CHEMISTRY POST UTME The greenhouse effect is a climatic condition associated with the presence of excess H2S CO2 NO NH3 24 / 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 all the reactants have been used up all the products have been formed there is no further change in temperature 25 / 50 Category: CHEMISTRY POST UTME The major source of oxides of nitrogen is from the burning of fuel coal chlorofluorocarbons wood 26 / 50 Category: CHEMISTRY POST UTME Which of the following is needed to produce a slag during the extraction of iron in the blast furnace? cryolite carbon limestone sulphur 27 / 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? 2.0 4.0 5.0 3.0 28 / 50 Category: CHEMISTRY POST UTME Which of the following gases can be collected by the method of downward delivery? ammonia chlorine oxygen hydrogen 29 / 50 Category: CHEMISTRY POST UTME The following uses radioactive isotopes except for determining equilibrium positions tracing reaction paths sterilization of medical equipment dating elements 30 / 50 Category: CHEMISTRY POST UTME Organic Chemistry is the branch of Chemistry that deals with ------- and ------ Carbon & Sulphur Carbon & Carbon Hydrogen & oxygen Carbon & Hydrogen 31 / 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? 12.5moles 0.625moles 25moles 6.25moles 32 / 50 Category: CHEMISTRY POST UTME The percentage of water of crystallization in ZnSO4. 7H2O is 87% 33% 55% 44% 33 / 50 Category: CHEMISTRY POST UTME Which quantum number divides shells into orbitals? spin azimuthally Principal magnetic 34 / 50 Category: CHEMISTRY POST UTME An amphoteric oxide is an Oxide that behaves as a base as well as an acid amorphorous oxide of a metal amorphorous oxide of a non-metal Oxide that is insoluble in water 35 / 50 Category: CHEMISTRY POST UTME Palm wine turns sour with time because the CO2 formed during the fermentation process has a sour taste the sugar content is converted into alcohol microbiological activity results in the production of organic acids within it. it is commonly adulterated by the tappers and sellers 36 / 50 Category: CHEMISTRY POST UTME The following are uses of sulphur except coating of steel to prevent rusting vulcanization of rubber manufacture of tetraoxosulphate (VI) acid manufacture of dyes 37 / 50 Category: CHEMISTRY POST UTME Pauli exclusion principle is related to electronegativity values of elements collision theory of reactions rate quantum numbers of electrons reversibility of equilibrium reactions 38 / 50 Category: CHEMISTRY POST UTME What weight of sodium hydroxide is required to make 500cm3 of 0.2M solution? 40g 4g 20g 10g 39 / 50 Category: CHEMISTRY POST UTME Which of the following is an acidic salt? Na2S Na2SO4 NaHSO4 CH3CO2Na 40 / 50 Category: CHEMISTRY POST UTME Esterification of propane 1, 2, 3-triol and unsaturated higher carboxylic acids will produce alkanols methyl propanoate fats soap 41 / 50 Category: CHEMISTRY POST UTME The IUPAC names for the compounds CH3COOH and CH2 = CH2 are respectively; acetic acid and ethene methanoic acid and ethylene ethanoic acid and ethene acetic acid and ethane 42 / 50 Category: CHEMISTRY POST UTME The metal extracted from cassiterite is sodium copper calcium tin 43 / 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 112cm3 100cm3 168cm3 224cm3 44 / 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 liquefaction evaporation Brownian motion 45 / 50 Category: CHEMISTRY POST UTME Organic molecules that have the suffix-ene are unsaturated hydrocarbons that have a single bond double bond a triple bond an ionic bond 46 / 50 Category: CHEMISTRY POST UTME The molecular formula of a common organic laboratory anesthetic is CHI3 CCl4 CHCl3 CHF3 47 / 50 Category: CHEMISTRY POST UTME Which of the following types of reactions takes place between C2H4 and the halogens? polymerization Oxidation Addition Substitution 48 / 50 Category: CHEMISTRY POST UTME Cotton is almost pure protein cellulose animal fibre starch 49 / 50 Category: CHEMISTRY POST UTME The greenhouse effect is a climatic condition associated with the presence of excess H2S NO NH3 CO2 50 / 50 Category: CHEMISTRY POST UTME Which of the following properties increases down a group in the Periodic Table ionization energy electron affinity atomic radius electronegativity Your score is 0% Restart quiz