A sample of orange juice is found to have a pH of 3.80. What is he concentration of the hydroxide ion in the juice?
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1992
In what way is equilibrium constant for the forward reaction related to that of the reversed reaction?
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1992
In which of the following is the entropy change positive?
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1992
MnO2 + 2CI- + 4H+ → MnO2+ + CI2 + 2H2O. The changes is oxidation numbers when the manganese, chloride and hydrogen ions react according to the above equation are respectively?
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1992
S2O2-3 + I2 → S2O62- + 2I-. In reaction above, the oxidizing agent is?
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1992
Calculate the mass, in kilograms, of magnesium produced by the electrolysis of magnesium (II) chloride in a cell operating for 24 hours at 500 amperes.
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1992
Which of the following oxides of nitrogen is unstable in air?
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1992
Which of the following combination of gases is used for metal welding? i. Oxygen and ethyne, ii. Hydrogen and ethyne, iii. Hydrogen and oxygen, iv. Ethyne, hydrogen and oxygen.
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1992
Which of these statements is TRUE about carbon (IV) oxide?
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1992
For a general equation of the nature xP + yQ ≈ mR + nS, the expression for the equilibrium constant is?
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1992
Which of the following equilibria shows little or no net reaction when the volume of the system is decreased?
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1992
Sodium hydroxide solution can be conveniently stored in a container made of?
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1992
Addition of an aqueous solution of a salt gives a white precipitate. The salt is likely to be a?
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1992
Safety matches contain sulphur and?
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1992
The gas formed when ammonium trioxonitrate (V) is heated with sodium hydroxide is?
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1992
Which of the following compounds reacts with sodium metal as well as silver and copper salts ?
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1992
The carbon atoms in ethene are?
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1992
CaOs + H2O(l) → Ca(OH)2(s) ΔH -65 kj. The process represented by the above equation is known as?
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1992
Duralumin consists of aluminium, copper, ?
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1992
Which of the following is NOT used as a raw material in the Solvay process?