Chemistry

Q. What is the change in internal energy of an ideal gas when it is heated at constant volume? (2021) 2021
  • A. Zero
  • B. Equal to heat added
  • C. Equal to work done
  • D. Equal to pressure times volume
Q. What is the chemical formula for sodium chloride? (2023) 2023
  • A. NaCl
  • B. Na2Cl
  • C. NaCl2
  • D. Na2Cl2
Q. What is the chemical formula for table salt? (2019)
  • A. NaCl
  • B. KCl
  • C. CaCl2
  • D. MgCl2
Q. What is the color of the complex [Cu(H2O)6]2+? (2023) 2023
  • A. Green
  • B. Blue
  • C. Red
  • D. Yellow
Q. What is the common oxidation state of Alkaline earth metals? (2014) 2014
  • A. +1
  • B. +2
  • C. +3
  • D. 0
Q. What is the common oxidation state of Group 1 elements? (2021)
  • A. -1
  • B. 0
  • C. +1
  • D. +2
Q. What is the common oxidation state of Group 13 elements? (2021)
  • A. +1
  • B. +2
  • C. +3
  • D. +4
Q. What is the common oxidation state of nitrogen in ammonia (NH3)? (2023) 2023
  • A. -3
  • B. 0
  • C. +1
  • D. +3
Q. What is the concentration in mol/L of a solution made by dissolving 58.5 grams of NaCl in 1 liter of water? (Molar mass of NaCl = 58.5 g/mol) (2023) 2023
  • A. 1 M
  • B. 0.5 M
  • C. 2 M
  • D. 0.25 M
Q. What is the concentration of a solution if 5 g of NaOH is dissolved in 250 mL of water? (2020)
  • A. 0.5 M
  • B. 1 M
  • C. 0.2 M
  • D. 0.1 M
Q. What is the concentration of H+ ions in a solution with pH 3? (2019) 2019
  • A. 0.001 M
  • B. 0.01 M
  • C. 0.1 M
  • D. 1 M
Q. What is the concentration of H+ ions in a solution with pH 4?
  • A. 0.0001 M
  • B. 0.01 M
  • C. 0.1 M
  • D. 1 M
Q. What is the coordination number of the central metal ion in the complex ion [Co(NH3)6]Cl3? (2021)
  • A. 2
  • B. 4
  • C. 6
  • D. 8
Q. What is the coordination number of the complex ion [Co(NH3)5Cl]Cl2? (2023)
  • A. 4
  • B. 5
  • C. 6
  • D. 3
Q. What is the coordination number of the complex ion [Co(NH3)6]Cl3? (2022) 2022
  • A. 4
  • B. 6
  • C. 2
  • D. 8
Q. What is the coordination number of the metal ion in the complex [Co(NH3)5Cl]Cl2? (2023)
  • A. 4
  • B. 5
  • C. 6
  • D. 3
Q. What is the effect of adding a common ion on the solubility of a salt? (2020)
  • A. Increases solubility
  • B. Decreases solubility
  • C. No effect
  • D. Depends on temperature
Q. What is the effect of increasing pressure on a gas at constant temperature? (2014)
  • A. Volume increases
  • B. Volume decreases
  • C. No effect on volume
  • D. Gas becomes a liquid
Q. What is the effect of increasing temperature on chemisorption? (2022)
  • A. Increases adsorption
  • B. Decreases adsorption
  • C. No effect
  • D. Depends on the gas
Q. What is the effect of increasing temperature on the volume of a gas at constant pressure?
  • A. Volume decreases
  • B. Volume increases
  • C. Volume remains constant
  • D. Volume fluctuates
Q. What is the effect of increasing the temperature on the solubility of most solid solutes in water? (2023)
  • A. Increases solubility
  • B. Decreases solubility
  • C. No effect
  • D. Depends on the solute
Q. What is the effect of temperature on chemisorption? (2023)
  • A. Increases with temperature
  • B. Decreases with temperature
  • C. Remains constant
  • D. Depends on the gas
Q. What is the effect of temperature on chemisorption? (2023) 2023
  • A. Increases with temperature
  • B. Decreases with temperature
  • C. Remains constant
  • D. Depends on the gas
Q. What is the effect of temperature on the cell potential according to the Nernst equation?
  • A. Increases with temperature
  • B. Decreases with temperature
  • C. No effect
  • D. Depends on the reaction
Q. What is the efficiency of a Carnot engine operating between temperatures T1 and T2? (2019) 2019
  • A. (T1 - T2) / T1
  • B. T2 / T1
  • C. (T1 - T2) / T2
  • D. 1 - (T2 / T1)
Q. What is the electron configuration of Chromium?
  • A. [Ar] 3d4 4s2
  • B. [Ar] 3d5 4s1
  • C. [Ar] 3d6 4s2
  • D. [Ar] 3d3 4s2
Q. What is the equilibrium constant (K) for the dissociation of acetic acid (CH3COOH) in water? (2023)
  • A. 1.8 x 10^-5
  • B. 1.0
  • C. 10
  • D. 100
Q. What is the equilibrium constant (Kc) for the reaction 2A + B ⇌ C? (2022)
  • A. Kc = [C] / ([A]^2[B])
  • B. Kc = [A]^2[B] / [C]
  • C. Kc = [B] / ([A]^2[C])
  • D. Kc = [C] / ([B][A])
Q. What is the equilibrium constant (Kc) for the reaction: A + B ⇌ C + D? (2022)
  • A. Kc = [C][D]/[A][B]
  • B. Kc = [A][B]/[C][D]
  • C. Kc = [C][D][A][B]
  • D. Kc = [A][B][C][D]
Q. What is the equilibrium constant (Kc) for the reaction: N2(g) + 3H2(g) ⇌ 2NH3(g)? (2022) 2022
  • A. 1.0 × 10^-5
  • B. 1.0 × 10^-2
  • C. 1.0 × 10^2
  • D. 1.0 × 10^5
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