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Paper: ICSE X - Chemistry - Sample Paper 2 Total mark ks of the pape er: 80 Total time of the paper: 1:30 Hrs Test instru uctions: Answer to this paper mus st be written on n the paper provided separate ely. You will no ot be allowed to o write during th he first 15 minu utes. This time is s to be spent in n reading the question paper. The time given at the hea ad of paper is th he time allowed d for writing the e answers. This questiion paper is div vided into two sections. s Section I is s of 40 marks and a compulsory y; contains one e question with parts (a) to (h)); all eight partss are to be answered. Section II is also of 40 ma arks; contains six s questions numbered n 2 to 7. You are to answer any fo our of these que estions. All working g, including rough work, should be done on the t same shee et as the rest off the answer. Questions s: 1 ] a. From the list given below, b select th he word(s) requ uired to correcttly complete the e blanks (i) to ((v) in the follow wing passage: Note: Words chosen n from the list are a to be used only o once. Writte only the ansswers, Do not ccopy the passa age. [reddiish brown, amm monium, nitrogen dioxide, hyd droxyl, dirty gre een, ammonia, acidic, alkaline e] Nitrog gen and hydrog gen combine in n the presence of the catalyst to give [Marks:5] (i) ___ ____________ __ gas. When the above menttioned gas is p passed through h water it forms a solutio on which will be (ii) __ _____________ ___ in nature and a the solution n contains (iii) __ ____________ ___ ions and (iv)__ ____________ ions. The abov ve solution give es a (v) __ _____________ __coloured pre ecipitate of iron (II) hydroxide.. b. Selec ct from the list given g (a to e) one substance in i each case w which matches the description n given in parts (i) to (v). (Note e: Each substan nce is used only once in the a answer.) (a) Nitroso iron (II) sulphate s (b) Iro on (III) chloride (c) Ch hromium sulpha ate (d) Le ead (II) chloride e (e) So odium chloride [Marks:5] (i) A compound c whic ch is deliquescent. (ii) A compound c which is insoluble in cold water, but soluble in h hot water. (iii) Th he compound responsible r for the brown ring g during the bro own ring test off nitrate ion. (iv) A compound whose aqueous solution s is neutral in nature. (v) Th he compound which w is respon nsible for the grreen coloration n when sulphur dioxide is passsed throug gh acidified pottassium dichromate solution. c. [Marks:10 ] d. State your observatiion for the follo owing cases: (i) Mo oist blue litmus is introduced in nto a gas jar off sulphur dioxid de. (ii) Drry red rose peta als are placed in i the jar of sulphur dioxide Tran ns Web Educcational Servvices Pvt. Ltd d B 14 47,1st Floor, Sec-6, NOID DA, UP-2013001 Website:w www.askiitians..com Email. iinfo@askiitianns.com Tel:0120--4616500 Ext - 204 [Marks:5]
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