14/10/2019Tutor Test (Chemistry) 0Comments by Gate Academy Welcome to your Tutor Test (Chemistry)You have 10 minutes to complete the test of 20 questions.Instructions 1. Answer ALL Questions. 2. Make sure you are prepared before you start the test. 3. Make sure you have a steady internet connection. 4. Do not attempt to reload the test page once you begin. 5. Fill the text field below with your correct details before you begin Full Name Email Address 1. When ΔH is negative, the reaction is said to be, Irreversible Exothermic Reversible Ionic Endothermic2. Which of the following decreases when a given mass of gas is compressed to half its initial volume? Number of molecules present Atomic radius of each particle Frequency of collisions Average intermolecular distance3. H2(g) + I2(g) ↔ 2HI(g) In the reaction, increasing the pressure will favour the backward reaction have no effect on the equilibrium position decrease the concentration of HI increase the concentration of HI favour the forward reaction4. The formula of the fourth member of the carboxylic family is C3H5COOH C4H7COOH C3H6COOH C3H7COOH C4H9COOH5. When excess ammonia is added to an aqueous copper(ii)tetraoxosulphate(vi), a deep blue solution of copper(ii)tetraamine is formed. The type of bond in copper(ii)tetraamine is coordinate covalent bond van der waals covalent bond hydrogen bond ionic bond6. If two metallic ions of the same concentration migrate to a graphite cathode, the one that would be preferentially discharged, is the one that has Smaller mass Stronger tendency to accept electrons Lower electrical charge Greater stability in solution7. Solid NH4Cl and KCl are mixed together. How could they be separated easily? Precipitation by the addition of AgNO3 solution to the mixture dissolved in water Dissolution of the mixture in water followed by filtration Extraction Decantation of an aqueous solution of the mixture Sublimation8. 15dm³ of a gas at s.t.p. in a tube was pressed by a piston whose pressure was increased to twice its original value at the same temperature. The volume of the gas in dm³ at this new pressure is 10.0dm³ 7.5dm³ 30.0dm³ 12.0dm³ 5.0dm³9. Trioxonitrate(v) acid is not used for preparing hydrogen gas from metals because it Is volatile Renders the metal passive Is strongly oxidising Forms a layer of oxide on the metal10. The following oxides react with both acids and bases to form salts except Carbon(iv)oxide Tin(iv)oxide Lead(ii)oxide Zinc oxide11. Freshly boiled tap water tastes different from ordinary tap water because all the germs have been killed it contains less dissolved air it contains more dissolved oxygen the water molecules are now smaller it contains more carbon(iv)oxide12. Which of the following alloys contain Tin and Lead? brass solder steel bronze coinage metal13. Which acid is present in lemon? lactic acid citric acid tartaric acid marlic acid14. Dynamic equilibrium describes a situation where? Reaction gives back the reactant Both forward and reverse reactions proceed at the same rate A concentration of reactants and product is equal Reactants are converted to products15. Which of the following is not a type of elements? Non Metals Metalloids Metals Gases16. Substance Q reacts with cold water to form a solution which turns red litmus blue?Substance Q could be Sulphur Nitrogen Calcium Phosphorus17. If a metal R forms a compound with the formula R(NO3)2 , the formula of its tetraoxosulphate(vi) is? R(SO4)2 RSO4 R2SO4 R2(SO4)318. The condition for spontaneous reaction is ΔG > 0 ΔH > 0 ΔS < 0 ΔG < 0 ΔG = 019. Hydrogen can be found in these substances except? Alkalis Natural gas None of the above Limestone Acids20. What mass of water is produced when 8.0g of hydrogen reacts with excess oxygen?[H=1, O=16] 36.0g 8.0g 72.0g 54.0gYou've successfully completed your test.Submit below.