2-Practice Board Paper Chemistry PDF

New Indian Era’s NIE CLASSES 5th – 8th 9th – 10th Foundation 11th -12th (Sci) JEE MAINS MHT CET NEET 2-Practice Board Paper Chemistry by NIE SECTION − A Q.1. Select and write the correct answer for the following m...

New Indian Era’s NIE CLASSES 5th – 8th 9th – 10th Foundation 11th -12th (Sci) JEE MAINS MHT CET NEET 2-Practice Board Paper Chemistry by NIE SECTION − A Q.1. Select and write the correct answer for the following multiple choice type of questions: (1) The amorphous solid among the following is ___ a) copper b) Magnesium c) Tar d) diamond sulphate (2) The units of Henry’s law constant are a. bar dm3mol-1 b. mol L-1 bar-1 c. L mol-1 bar-1 d. bar L-1 mol-1 (3) The theory which explain amphoteric nature of water is a. Slightly theory b. slightly basic c. Strongly basic d. Bronsted- Lowry theory (4) An intensive property amongst the following is………… a) Mass b) Volume c) Number of moles d) Temperature (5) In construction of Standard Hydrogen Electrode, platinum acts as _____ a) inert electrode b) positive ion producing electrode c) negative ion producing electrode d) donor of electrons (6) A First order reaction is 50% complete in 69.3 minutes. Time required for 90% completion for the same reaction is a) 100 b)125 mins c) 230 mins d) 230.3 mins (7) In Interhalogen compounds, which halogen is never the central atom? a) I (b) F (c) Br (d) Cl  New Indian Era’s NIE CLASSES 5th – 8th 9th – 10th Foundation 11th -12th (Sci) JEE MAINS MHT CET NEET (8) he following pair of elements has half-filled d-orbitals (a) chromium and cobalt (b) manganese and nickel (c) chromium and manganese (d) cobalt and nickel (9) Amongst the following, the ambidentate ligand is……… a) Ethylene diamine b) Oxalate ion c) Chloride ion d) Cyanide ion (10) Acid anhydride on reaction with primary amine gives compound having a functional group (a) amide (b) nitrile (c) secondary amine (d) imine Q.2. Answer the following questions: 1) Write the effect on density of a substance in the Frenkel defect? 2) What are hypertonic solutions? 3) Write the formula to calculate pH of buffer solution. 4) Write the mathematical relation between ∆H and ∆U during formation of one mole of CO2 under standard conditions. 5) Write the chemical composition present in the salt bridge. 6) Write the unit of rate constant for the first order reaction. 7) Write the name of a solution formed by passing sulfur dioxide in water 8) Write the general electronic configuration of 3d series.  New Indian Era’s NIE CLASSES 5th – 8th 9th – 10th Foundation 11th -12th (Sci) JEE MAINS MHT CET NEET SECTION − B Attempt any EIGHT questions of the following: Q3) Classify the following solids as molecular, ionic, covalent and metallic solids. Pb, MgF2 , SO2 and quartz Q4) In what way Kf and Kb are similar and in what way they are different? Q5) Explain Ostwald’s dilution law for weak acids. Q6) Write relationship between ΔG and ΔS total Q7) How many moles of electrons are required for reduction of 2 moles of Zn2+ to Zn ? Q8) Explain pseudo first order reaction with a suitable example. Q9) Write four uses of chlorine. Q10) Explain terms cast iron and wrought iron with their uses? Q11) Write the consequences of Schottky defect with reasons. Q12) Write chemical reactions to prepare ethanamine from: (i) acetonitrile (ii) nitroethane Q13) Write one example each of bidentate and ambidentate ligands. Q14) Define Optical activity. Draw the structure of DDT.  New Indian Era’s NIE CLASSES 5th – 8th 9th – 10th Foundation 11th -12th (Sci) JEE MAINS MHT CET NEET SECTION − C Attempt any EIGHT questions of the following: Q15) A substance crystallizes in fcc structure. The unit cell edge length is 367.8pm. Calculate the molar mass of the substance if its density is 21.5 g/cm3. Q16) A solution containing 3 g of solute A (M=60 g/mol) in 1L solution is isotonic with a solution containing 8.55 g of solute B in 500 mL solution. What is the molar mass of B? Q17) Derive the equation which implies that the degree of dissociation of weak acid is inversely proportional to the square root of its concentration. Q18) a. Define an isolated system. b. Three moles of an ideal gas are expanded isothermally from 15 dm3 to 20 dm3 at constant external pressure of 1.2 bar, calculate the amount of work in Joules Q19) Draw a neat and labeled diagram of Lead accumulator. Q20) For a zero order reaction molecularity can never be equal to zero. Explain Q21) Define half life of first order reaction. Obtain the expression for half life and rate constant of the first order reaction. Q22) Write three physical properties and three uses of sulfuric acid. Q23) Calculate spin only magnetic moment of divalent cation of transition metal with atomic number 25. Salts of Ti4+ are colourless. Give reason.  New Indian Era’s NIE CLASSES 5th – 8th 9th – 10th Foundation 11th -12th (Sci) JEE MAINS MHT CET NEET Q24)Give similarities and differences in the elements of 3d,4d and 5d series. Q25) Write the IUPAC name of[𝑁𝑖(𝐶𝑁4)2-. Q26) Explain alkaline hydrolysis of aqueous tert. butyl bromide. SECTION − D Attempt any THREE questions of the following: Q27) Which of these compounds will undergo aqueous alkaline hydrolysis readily? Write the reaction in support of your answer. Q28) Write the mathematical equation for the first law of thermodynamics for (i) isothermal process (ii) adiabatic process Derive the relationship between pH and pOH. Q29) Define Bravais lattices. Niobium forms bcc structure. The density of niobium is 8.55 g/cm3 and the edge length of the unit cell is 330.6 pm.How many atoms and unit cells are present in 0.5 g of niobium? Q30) Explain the amphoteric nature of water. Define a) Solubility product b) Hydrolysis of salt Q31) Explain construction, working in terms of cell reactions and the results of electrolysis of fused NaCl. Draw a neat and labeled diagram of Leclanche cell(Dry Cell)  New Indian Era’s NIE CLASSES 5th – 8th 9th – 10th Foundation 11th -12th (Sci) JEE MAINS MHT CET NEET Thank you