A. Low electronegativity
B. Low electropositivity
C. Low charge density
D. Not known yet
✅ The correct answer is option B.
Chemistry
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42. Sodium benzoate and benzoic acid are mixed in equimolar ration to form buffer if pKa is 2 what will be the pH?
A. 0
B. 1
C. 2
D. Anyone
✅ The correct answer is option C.
43. Which one is a conductor but is not malleable?
A. Iron
B. Graphite
C. Silver
D. Platinum
✅ The correct answer is option B.
44. Nitrates of which pair of elements gives different products on thermal decomposition?
A. Na K
B. Mg Ca
C. Li Na
D. Li Ca
✅ The correct answer is option C.
45. AgCl dissolved with concentration (2×10-2) Ksp will be
A. 3.6 x 10-6
B. 3.6 x 10-5
C. 7.2 x 10-6
D. 4 x 10-4
✅ The correct answer is option D.
46. Which one of the following is not an alkali metal?
A. Francium
B. Caesium
C. Rubidium
D. Radium
✅ The correct answer is option D.
47. In which of the following equilibria will Kc and Kp have the same value?
A. PCI5 = PCI3 + Cl2
B. N2 + 3H2 = 2NH
C. 2CO + O2 = CO2
D. N2 + O2 = 2NO
✅ The correct answer is option D.
48. Which one is not a state function
A. Internal energy
B. Enthalpy
C. Gibbs free energy
D. Work
✅ The correct answer is option D.
49. Which of the following will not change the concentration of ammonia at the equilibrium?
A. Increase of pressure
B. Increase of volume
C. Addition of catalyst
D. Decrease in temperature
✅ The correct answer is option C.
50. If the ΔH value is less than zero than reaction will be
A. Exothermic
B. Endothermic
C. May or may not be Exothermic or Endothermic
D. None of these
✅ The correct answer is option A.