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 Ag2S PbS H2S 2 / 50 Category: CHEMISTRY POST UTME Which of the following properties increases down a group in the Periodic Table electron affinity ionization energy atomic radius electronegativity 3 / 50 Category: CHEMISTRY POST UTME The percentage of water of crystallization in ZnSO4. 7H2O is 44% 55% 87% 33% 4 / 50 Category: CHEMISTRY POST UTME The molecular formula of a common organic laboratory anesthetic is CHI3 CHF3 CHCl3 CCl4 5 / 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 2.0 4.0 5.0 6 / 50 Category: CHEMISTRY POST UTME An amphoteric oxide is an Oxide that is insoluble in water amorphorous oxide of a metal Oxide that behaves as a base as well as an acid amorphorous oxide of a non-metal 7 / 50 Category: CHEMISTRY POST UTME Lucas reagent is used to test for alkanoic acids alkanes amines alkanols 8 / 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 evaporation liquefaction Brownian motion 9 / 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 10 / 50 Category: CHEMISTRY POST UTME The major source of oxides of nitrogen is from the burning of chlorofluorocarbons fuel coal wood 11 / 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? 6.25moles 0.625moles 12.5moles 25moles 12 / 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 72 89 82 13 / 50 Category: CHEMISTRY POST UTME Calcium atom ionizes by sharing two electrons losing two electrons gaining two electrons gaining two proton 14 / 50 Category: CHEMISTRY POST UTME An element X forms the following compounds with chlorine: XCl4, XCl3, XCl2. This illustrate the law of conservation of mass law of multiple proportions law of definite proportions law of chemical proportions 15 / 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 16 / 50 Category: CHEMISTRY POST UTME The following uses radioactive isotopes except for dating elements sterilization of medical equipment determining equilibrium positions tracing reaction paths 17 / 50 Category: CHEMISTRY POST UTME Esterification of propane 1, 2, 3-triol and unsaturated higher carboxylic acids will produce methyl propanoate fats alkanols soap 18 / 50 Category: CHEMISTRY POST UTME The oxidation number of chlorine is +1in KClO3 Cl2O7 ZnCl2 NaClO 19 / 50 Category: CHEMISTRY POST UTME Which of the following types of reactions takes place between C2H4 and the halogens? Addition Substitution polymerization Oxidation 20 / 50 Category: CHEMISTRY POST UTME Which of the following gases can be collected by the method of downward delivery? oxygen ammonia chlorine hydrogen 21 / 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 1.2atm 1.4atm 0.8atm 22 / 50 Category: CHEMISTRY POST UTME The metal extracted from cassiterite is tin calcium copper sodium 23 / 50 Category: CHEMISTRY POST UTME Organic Chemistry is the branch of Chemistry that deals with ------- and ------ Carbon & Sulphur Carbon & Hydrogen Hydrogen & oxygen Carbon & Carbon 24 / 50 Category: CHEMISTRY POST UTME The weakest attractive force that can be observed between two molecules is covalent ionic coordinates van der waals forces 25 / 50 Category: CHEMISTRY POST UTME Cotton is almost pure animal fibre starch protein cellulose 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? limestone carbon sulphur cryolite 27 / 50 Category: CHEMISTRY POST UTME Organic molecules that have the suffix-ene are unsaturated hydrocarbons that have double bond a single bond an ionic bond a triple bond 28 / 50 Category: CHEMISTRY POST UTME What weight of sodium hydroxide is required to make 500cm3 of 0.2M solution? 4g 40g 20g 10g 29 / 50 Category: CHEMISTRY POST UTME The greenhouse effect is a climatic condition associated with the presence of excess H2S CO2 NH3 NO 30 / 50 Category: CHEMISTRY POST UTME The IUPAC names for the compounds CH3COOH and CH2 = CH2 are respectively; acetic acid and ethane methanoic acid and ethylene ethanoic acid and ethene acetic acid and ethene 31 / 50 Category: CHEMISTRY POST UTME Alkanals can be differentiated from alkanones by reaction with sodium hydrogen sulphite 2, 4 – dinitrophenylhydrazine hydrogen cyanide Tollen’s reagent 32 / 50 Category: CHEMISTRY POST UTME The principal constituents of natural gas is methane propane ethane butane 33 / 50 Category: CHEMISTRY POST UTME Copper metal dissolves in concentrated trioxonitrate (v) acid with the resultant evolution of CO NO2 CO2 SO2 34 / 50 Category: CHEMISTRY POST UTME Palm wine turns sour with time because the CO2 formed during the fermentation process has a sour taste it is commonly adulterated by the tappers and sellers the sugar content is converted into alcohol microbiological activity results in the production of organic acids within it. 35 / 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) 4.8g 96 6.4g 3.2g 36 / 50 Category: CHEMISTRY POST UTME Which of the following halogens is the most reactive? Br2 I2 F2 Cl2 37 / 50 Category: CHEMISTRY POST UTME Which of the following is an acidic salt? Na2SO4 Na2S NaHSO4 CH3CO2Na 38 / 50 Category: CHEMISTRY POST UTME The carbon atoms on ethane are SP2d hybridized SP3 hybridised SP hybridized Sp2 hybridised 39 / 50 Category: CHEMISTRY POST UTME Which quantum number divides shells into orbitals? spin azimuthally Principal magnetic 40 / 50 Category: CHEMISTRY POST UTME The greenhouse effect is a climatic condition associated with the presence of excess H2S NO NH3 CO2 41 / 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 42 / 50 Category: CHEMISTRY POST UTME Pauli exclusion principle is related to reversibility of equilibrium reactions quantum numbers of electrons electronegativity values of elements collision theory of reactions rate 43 / 50 Category: CHEMISTRY POST UTME In the Periodic Table, the elements that lose electrons most readily belong to group IIIA group VIIA group IA group IIA 44 / 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 Q will form an electrovalent bond with S R will form an electrovalent bond with S 45 / 50 Category: CHEMISTRY POST UTME Which of the following is not a member of the homologous series of the paraffins? C15H32 C3H8 C5H12 C24H48 46 / 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 168cm3 100cm3 224cm3 47 / 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 6.00dm3 60.0dm3 18.80dm3 48 / 50 Category: CHEMISTRY POST UTME Which of the following substances increases in mass when heated in air? sodium chloride iodine crystals copper (ii)oxide magnessium ribon 49 / 50 Category: CHEMISTRY POST UTME Catalytic hydrogenation of benzene produces benzene an aromatic hydrogenation cyclohexane margarine 50 / 50 Category: CHEMISTRY POST UTME The following are uses of sulphur except manufacture of tetraoxosulphate (VI) acid manufacture of dyes vulcanization of rubber coating of steel to prevent rusting Your score is 0% Restart quiz