ISC 2022 Chemistry - Specimen paper (Semester 1), Paper 1 with Answers
All 50 questions of the ISC 2022 Chemistry - Specimen paper (Semester 1), Paper 1, in printed order. Open a question to read it in full and see its answer.
- Q1 Na and Mg crystallise in bcc and fcc structures respectively. The value of Z (number of atoms) for their crystals is: 1 mark · MCQ
- Q2 Colligative properties depend on: 1 mark · MCQ
- Q3 On dilution, the specific conductance of a solution: 1 mark · MCQ
- Q4 The flux used in the extraction of iron from haematite ore is: 1 mark · MCQ
- Q5 Which of the following xenon fluoride of xenon cannot be formed? 1 mark · MCQ
- Q6 The gas obtained on heating iodoform with silver powder is: 1 mark · MCQ
- Q7 Boiling point of ethyl alcohol is greater than diethyl ether due to: 1 mark · MCQ
- Q8 In a face centred cubic lattice, atom ‘A’ occupies the corner positions and atom ‘B’ occupies the face centred positions. If one… 1 mark · MCQ
- Q9 The standard reduction potential values of three metallic cations X, Y and Z are 0.52 V, -3.03 V and -1.18 V respectively. The… 1 mark · MCQ
- Q10 If molality of the dilute solution of a non-volatile, non-dissociating and non-associating electrolyte is doubled, the value of… 1 mark · MCQ
- Q11 Extraction of zinc from zinc blende is achieved by: 1 mark · MCQ
- Q12 The most powerful oxidizing agent is: 1 mark · MCQ
- Q13 During the course of SN1 reaction, the intermediate species formed is: 1 mark · MCQ
- Q14 Which type of defect has the presence of cations in the interstitial sites? 1 mark · MCQ
- Q15 Reaction between acetone and methyl magnesium chloride, followed by hydrolysis will give: 1 mark · MCQ
- Q16 If 5.85 g of NaCl are dissolved in 90 g of water, the mole fraction of solute is: 1 mark · MCQ
- Q17 When zinc granule is dipped into copper sulphate solution, copper is precipitated because: 1 mark · MCQ
- Q18 The optically active compound is: 1 mark · MCQ
- Q19 Chlorine reacts with cold and dilute NaOH under ordinary conditions to give: 1 mark · MCQ
- Q20 Solutions which distil without any change in composition and temperature are called: 1 mark · MCQ
- Q21 The reaction: Sodium alkoxide + alkyl halide $\rightarrow$ Ether + Sodium halide is called: 1 mark · MCQ
- Q22 Benzene diazonium chloride on hydrolysis gives: 1 mark · MCQ
- Q23 The vacant space in body centred cubic lattice unit cell is: 1 mark · MCQ
- Q24 For a spontaneous reaction $\Delta G^\circ$ and $E^\circ_{\text{cell}}$ will be respectively: 1 mark · MCQ
- Q25 A liquid is mixed with ethanol and few drops of conc. $\text{H}_2\text{SO}_4$ is added. A compound with a fruity smell is formed… 1 mark · MCQ
- Q26 The chief ore of copper is copper pyrite (CuFeS2) How is the sulphide ore concentrated? Copper is purified by electrolytic… 2 marks · Short answer
- Q27 The reaction: $\text{CH}_3\text{Br} + \text{OH}^- \rightarrow \text{CH}_3\text{OH} + \text{Br}^-$ The expected mechanism of the… 2 marks · Short answer
- Q28 For the extraction of metal, answer the following: The smelting of iron ore in blast furnace involves all the processes except… 2 marks · Short answer
- Q29 Phenol is heated with alcoholic KOH and chloroform: What is the name of the reaction? What is the main product formed in this… 2 marks · Short answer
- Q30 For IF7 molecule: The structure of the given molecule is: The type of hybridization of the given molecule is: 2 marks · Short answer
- Q31 Ethyl alcohol when reacts with PCl5 gives a compound (A). When compound (A) is treated with alc. KOH, compound (B) is formed… 2 marks · Short answer
- Q32 Copper pyrite or chalcopyrite (CuFeS2) is the main ore of copper. The extraction of copper from its ore involves, concentration… 2 marks · Short answer
- Q33 Conversion of Chlorobenzene into phenol. Which of the following statements is correct for the above conversion? What is the name… 2 marks · Short answer
- Q34 With reference to XeF6 molecule, answer the following questions. What is the hybridisation of Xe atom in the given molecule? What… 2 marks · Short answer
- Q35 An unknown alcohol is treated with Lucas reagent to determine whether the alcohol is primary, secondary or tertiary. Which… 2 marks · Short answer
- Q36 Ozone is prepared from oxygen: Which method is used in the above preparation? The ozone obtained above acts as a: 2 marks · Short answer
- Q37 Copper metal crystallises with face centred cubic unit cell. If the edge length of copper atom is 361.5 pm. (Atomic weight of Cu… 2 marks · Short answer
- Q38 An aqueous solution containing one gram of urea (molecular weight = 60) boils at 100.25oC. The same solution freezes at -0.894… 2 marks · Short answer
- Q39 When two Faradays of electricity is passed through an aqueous solution of CuSO4 and an aqueous solution of AgNO3. (Atomic weight… 2 marks · Short answer
- Q40 Gold has cubic crystal whose unit cell has an edge length of 407.9 pm. Density of gold is 19.3 g cm-3. Atomic weight of gold is… 2 marks · Short answer
- Q41 A solution of sucrose (molecular weight 342 g mol-1) has been prepared by dissolving 68.4 g of sucrose in 1000 g of water. (Kf… 2 marks · Short answer
- Q42 The standard electrode potential for the reaction is: (I)… 2 marks · Short answer
- Q43 A metal has face centred cubic lattice. The edge length of the unit cell is 404 pm. The density of the metal is 2.72 g/cm3. (NA =… 2 marks · Short answer
- Q44 A binary solution contains 92 g ethyl alcohol and 72 g water. (Atomic weight of C = 12, H =1, O =16) Mole fraction of ethyl… 2 marks · Short answer
- Q45 The limiting molar conductivities ($\Lambda^\infty_m$) for NaCl, KBr and KCl are 126, 152 and… 2 marks · Short answer
- Q46 Haloalkanes when treated with alcoholic KCN forms alkane nitrile as a major product. 1 mark · Assertion-reason
- Q47 Iron is found free in nature. 1 mark · Assertion-reason
- Q48 Ethers are more volatile than alcohols having the same molecular formula. 1 mark · Assertion-reason
- Q49 SO2 decolorises pink colour of acidified KMnO4 solution. 1 mark · Assertion-reason
- Q50 Sulphide ores are concentrated by froth floatation process. 1 mark · Assertion-reason