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. P,Q,R, and S are metals in the same group in the periodic table but in periods 3, 4, 5 and 6 respectively. Which of them loses electrons least reactively?QPNone of the aboveRS2. What property of hydrogen makes it suitable for filling balloons?Its low densityIts flammabilityIts tensile strengthIts solubility3. A catalyst which increases the rate of a chemical reaction does so by?Increasing the surface area of the reactionIncreasing the pressure on the systemDecreasing the activation energy of the reactionIncreasing the reaction pathway4. Water gas is a mixture of?carbon(ii)oxide and hydrogenCarbon and hydrogenNitrogen and hydrogenCarbon(iv)oxide and hydrogen5. Example(s) of colloids include:I. emulsionsII. solsIII. FogIV. smokeI and II OnlyI, II and III OnlyI, II, III and IVIV OnlyIII and IV Only6. Dynamic equilibrium describes a situation where?Both forward and reverse reactions proceed at the same rateA concentration of reactants and product is equalReactants are converted to productsReaction gives back the reactant7. What term is used to describe an oxide whose aqueous solution turns blue litmus redStrong electrolyteAcid anydrideAmphoteric oxideBasic oxide8. The green house effect is a climatic condition associated with the presence of excessCarbon (iv) oxideAmmoniaCarbon (ii) oxideHydrogen sulphide9. The gas given off when calcium is added to water isOxygenNitrogen(iv)oxideHydrogenCalcium oxide10. Sulphur burns in air to form?Amphoteric OxideNeutral oxideBasic OxideAcidic oxide11. Substance Q reacts with cold water to form a solution which turns red litmus blue?Substance Q could beSulphurPhosphorusCalciumNitrogen12. Chemical equilibrium is attained whenConcentration of the reactants is greater than that of the productsConcentrations of the products and reactants remain constantReactants in the system are used upConcentration of products is greater than that of the reactant13. In the reaction, E + F ↔ G + H, the backward reaction is favoured if the concentration ofE is reducedF is increasedE is increasedG is reduced14. Which of the following is NOT a halogen?astatinefluorineiodinesiliconbromine15. Chemistry is a branch of science which can be used for providing the services to mankind. Comment on the statement.May BeTrueFalseStrongly not16. What is the pattern of the degree of electropositivity of elements in the periodic table?Remains constant across a periodDecreases down a group and across periodIncreases across a periodDecreases across a periodRemains constant down a group17. What term is used to describe an oxide whose aqueous solution turns blue litmus to red?Acid anhydrideAmphoteric oxideStrong electrolyteBasic oxide18. Solid NH4Cl and KCl are mixed together. How could they be separated easily?SublimationExtractionDissolution of the mixture in water followed by filtrationDecantation of an aqueous solution of the mixturePrecipitation by the addition of AgNO3 solution to the mixture dissolved in water19. When an atom gains an electron, it becomesPositively chargedChemically inactiveA non-metal atomA cationAn anion20. The following oxides reacts with both acids and bases to form salts excepttin (iv) oxideZinc oxidecarbon (iv) oxideLead (ii) oxideYou've successfully completed your test.Submit below.