classify these oxides as acidic, basic or amphoteric

(a) tri basic acid (b) di basic acid (c) mono basic acid (d) none of these Answer: (c) mono basic acid Hints: Hypophosphorus acid on reaction with D 2 O, only one hydrogen is replaced P by deuterium and hence it is mono basic. Because of these properties, water is a universal solvent. Students can solve NCERT Class 10 Science Periodic Classification of Elements Multiple Choice Questions with Answers to know their preparation level. The pH scale Indicates if the solution is acidic, basic our neutral. Free PDF Download of CBSE Class 10 Science Chapter 5 Periodic Classification of Elements Multiple Choice Questions with Answers. All Metal oxides are basic in nature i.e. 34. p-Block elements form acidic, basic and amphoteric oxides. Its nature is (a) basic (b) acidic (c) neutral (d) amphoteric. 5. Reaction with dilute acids 6. These layers are held together by the forces of weak van der Walls. Knowing the properties of H 2 O and D 2 O, do you think D 2 O can be used for drinking purpose. 7. It can hydrolyse many oxides metallic or non-metallic, hydrides, carbides, nitrides etc. The normal oxide formed by the element in extreme left is the most basic (i.eg. (a) Classify the following oxides as neutral, acidic, basic or amphoteric CO, B 2 O 2, Si0 2, C0 2, Al 2 O 3, PbO 2, Tl 2 O 3 (b) Write suitable equations to show their nature. As a result, PH3 is less basic than NH3 and basic character decreases down the group. Cambridge International AS and A Level Chemistry Coursebook 2nd Edition. The reaction of SO 2 with water. SO 2 + H 2 O → H 2 SO 3. Answer: No, D 2 O is injurious to human beings, plants and animals. Explain each property by giving two examples and also write the reactions of these oxides with water. Academia.edu is a platform for academics to share research papers. NH3 donates electron pair more readily than PH3. The reaction of Al with oxygen forms aluminium oxide Al2O3 which is amphoteric in nature as it can exhibit acidic as well as basic nature. The salts can be neutral, acidic or basic, depends on strength of acid/base used to form the salt. CO, B 2 O 3, SiO 2, CO 2, Al 2 O 3, PbO 2, Tl 2 O 3 Solution: ACIDIC OXIDES. (A) basic (B) neutral (C) acidic (D) can’t be predicted. Cambridge International AS and A Level Chemistry Coursebook 2nd Edition So, 0-7 is acidic, 7 is neutral, 7-14 basic solution. To reduce this problem air pollution devices are fitted in exhaust pipes and chimneys to neutralize the acidic compounds before reaching the … Metals react with oxygen to form oxides. Question 26. Q.2 A definite amount of gaseous hydrocarbon having (carbon atoms less than 5) was burnt with sufficient amount of O2. , Na 2 O) whereas that formed by the element on extreme right is the most acidic (e.g., Cl 2 O 7). In solid ice, oxygen atom is … Calcium phosphate is present in tooth enamel. 606 Pages. It is an scale from 0-14. These layers may slide over each other, making graphite slippery and soft. The reaction of B2O3 with water. SO 2, B 2 O 3 are acidic oxides and p block elements. 4Al(s) + 3O2 (g) à 2Al2O3(s) Hence, A = aluminium and B=Aluminium oxide. Reactions of aluminium oxide with HCl and NaOH are as given below; Element on two extremes of a period easily combine with oxygen to form oxides. M + O2 → Metal oxides . Question 31. Question 11.27 In some of the reactions thallium resembles aluminium, whereas in others it resembles with group I metals. 2. MCQ Questions for Class 10 Science with Answers was Prepared Based on Latest Exam Pattern. Aluminium (Al) is used in thermite process so metal A is Aluminium. Q 11.26 (a) Classify the following oxides as neutral, acidic, basic or amphoteric. they turn red litmus blue but some metal oxides are amphoteric in nature (that is, they have acidic & basic nature) like Al2O3 (aluminum oxide) & ZnO (zinc oxide). NH3 donates electron pair more readily than PH3. Question 30. 0 indicates highly acidic solution, 14 indicates highly basic solution. 7 is neutral. Consequently, it is used as a lubricant. Question 11.26 (a) Classify following oxides as neutral, acidic, basic or amphoteric: CO, B2O3, SiO2, CO2, Al2O3, PbO2, Tl2O3 (b) Write suitable chemical equations to show their nature. Question 18. Sodium carbonate is a basic salt because it is a salt of (a) strong acid and strong base (b) weak acid and weak base (c) strong acid and weak base (d) weak acid and strong base. These compounds like react with rain water to form acid rain increases acidity of soils, rivers and lakes and adversity affects vegetation and aquatic organism. BRILLIANT PUBLIC SCHOOL, SITAMARHI (Affiliated up to +2 level to C.B.S.E., New Delhi) Class-XI IIT-JEE Advanced Chemistry Study Package Session: 2014-15 Office: Rajopatti, Dumra Road, Sitamarhi (Bihar), Pin-843301 Ph.06226-252314 , Mobile:9431636758, 9931610902 Website: www.brilliantpublicschool.com; E-mail: [email protected][email protected]

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