Jamb Chemistry Quiz /15 0 Time is up! You need to think and answer fast!! Chemistry Quiz This Quiz will increase your knowledge in Chemistry. 1 / 15 Which of these metals, Mg, Fe, Pb, andCu will dissolve in dilute HCI? All the metals Mgm Fe, and Cu Mg, Fem and Pb Mg and Fe only 2 / 15 Number of molecules of water of crystallisation of the barium salt is....2.5g of a hydrated barium salt gave on heating, 2.13g of the anhydrous salt. Given that the relative molecular mass of the anhydrous salt is 208, the number of molecules of water of crystallization of the barium salt is 10 6 8 2 3 / 15 Sodium decahydrate (Na2SO4.10H2O) an exposure to air loses all its water of crystallization. Theprocess of loss is known as Efflorescence Effervescence Hygroscopy Deliquescence 4 / 15 Which of the following pair of gases will NOT react further with oxygen at a temperature between 30°C and400°C? SO2 and NH3 CO2 and H2 NO2 and SO3 SO3 and NO 5 / 15 Which of the following happens during the electrolysis of molten sodium chloride? Sodium ion loses an electron Chlorine atom gains an electron Chloride ion gains an electron Chloride ion is oxidized. 6 / 15 The colour imparted to a flame by calcium ion is Green Blue brick-red Red 7 / 15 When sodium dioxonitrate (111) (HaNO2\) dissolves is Exothermic Isothermic Isomeric Endothermic 8 / 15 A jet plane carrying 3,000 kg of ethane burns off all the gas-forming water and carbon dioxide. If all the carbondioxide is expelled and the water formed is condensed and kept on board the plane, then the gain in weight is 2120kg 2400kg 1800kg 1500kg 9 / 15 The alkanol obtained from the production of soap is Glycerol ethanol propanol methanol 10 / 15 A gas that can behave as reducing agent towards chlorine and as an oxidizing agent toward hydrogen sulphide is O2 NO SO2 NH3 11 / 15 Zn + H2SO4 = ZnCI2 + H2The rate of the above reaction will be greatly increased if... the zinc is in the powered form a greater volume of the acid is used a smaller volume of the acid is used the reaction vessel is immersed in an ice-bath 12 / 15 The molecular formula of X isAn unknown organic compound X has a relative molecular mass of 180. It is a colourless crystalline solid, readily soluble in water. X contains the element C, H, and O in the atomic ratio 1:2:1. The compound has a sweet taste and melts on heating. In the presence of yeast and in the absence of air X is converted to compound Y in the absence of air, X is converted to compound Y and colourless gas. Compound Y reacts with sodium metal to produce a gas Z which gives a €˜pop€™ sound with a glowing splint. Y also reacts with ethanoic acid to give a sweet smelling compound W. C12H22O11 C6H12O6 C7H14O7 C3H6O3 13 / 15 The mass of an atom is determined by its electrochemical potential the number of neutrons and protons the number of protons its ionization potential 14 / 15 Which of these shows a flaw in his report?In the preparation of some pure crystals of Cu(NO3)2 starting with CuO, a student gave the following statements as steps he employed. Some CuO was reacted with excess dilute H2SO4 When the concentrate was cooled, crystals formed were removed by filtration. The solution was concentrated The crystals were washed with very cold water 15 / 15 If an element has the electronic configuration 1s2 2s2 2p6 3s2 3p2 , it is a metal an s-block element an alkaline earth metal a p-block element Your score is Restart quiz CHANGE SUBJECT
