This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.
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Here are the answers to the questions: i) Write the value of 'R' in S.I. system? The value of the ideal gas constant 'R' in the S.I. system is: R = 8.314 \, J mol^-1 K^-1 8.314 J mol^-1K^-1 ii) Write the formula mass of NaCl? To calculate the formula mass of NaCl, we sum the atomic masses of Sodium (Na) and Chlorine (Cl). Atomic mass of Na ≈ 22.99 \, g/mol Atomic mass of Cl ≈ 35.45 \, g/mol Formula mass of NaCl = 22.99 + 35.45 = 58.44 \, g/mol 58.44 g/mol iii) Write the bond line formula of hept-2-ene? Hept-2-ene is a hydrocarbon with 7 carbon atoms and a double bond between the second and third carbon atoms. CH_3-CH=CH-CH_2-CH_2-CH_2-CH_3 The bond-line formula is: ` /\ / \ / \ / \ / \ / \ ` (A zigzag line with 7 vertices, and a double bond between the second and third vertices from one end). A 7-carbon chain with a double bond between C2 and C3. iv) Balance the nuclear reaction: ^118_54Xe → ? + ^1_0n In a nuclear reaction, both the mass number (superscript) and the atomic number (subscript) must be conserved. Let the unknown nuclide be ^A_ZX. Conservation of mass number: 118 = A + 1 A = 117 Conservation of atomic number: 54 = Z + 0 Z = 54 The element with atomic number 54 is Xenon (Xe). So the balanced reaction is: ^118_54Xe → ^117_54Xe + ^1_0n ^117_54Xe v) Write the units of equilibrium constant? The units of the equilibrium constant (K_c or K_p) depend on the stoichiometry of the specific chemical reaction. For a general reaction aA + bB cC + dD, the units of K_c would be (mol/L)^ n, where n = (c+d) - (a+b). Similarly, for K_p, the units would be (atm)^ n or (Pa)^ n. If n = 0, the equilibrium constant is unitless. Units depend on the stoichiometry of the reaction (e.g., (mol/L)^ n or (atm)^ n). vi) Write the name of hydrocarbon that is used as Lubricant? Paraffin wax (a mixture of long-chain alkanes) or mineral oil (a mixture of liquid hydrocarbons) are common hydrocarbon-based lubricants. Paraffin wax (or Mineral oil) vii) Name the type of adsorption in which van der Waals force are present? The type of adsorption in which van der Waals forces are present is physisorption (physical adsorption). Physisorption viii) Write the oxidation number of oxygen in superoxide? Superoxides contain the superoxide ion, O_2^-. Let the oxidation number of oxygen be x. Since there are two oxygen atoms and the total charge is -1: 2x = -1 x = -(1)/(2) -1/2