Answer : The correct options are, (C), (D) and (F)
Explanation :
Redox reaction : It is also know as an oxidation-reduction reaction in which the electrons transferred between the two species. In this, one species shows oxidation by losing electrons and another species shows reduction by gaining electrons.
Most of the chemical reactions shows the redox reaction. The chemical reactions like, synthesis, combustion, single replacement, decomposition shows the redox reaction.
As, the reactants of Option A, B and E does not shows redox reaction because in these reactions the metals will not displace the another metal ion due to less reactivity of metal.
While the reactants of option C, D and F shows redox reaction because in these reactions the metals will displace the another metal ion easily due to high reactivity of metal.
The reactivity series is shown below.
The balanced redox reactions will be,
Hence, the correct options are, (C), (D) and (F)
Answer:
2,347.8 grams
Explanation:
The freezing point depression Kf of water = 1.86° C / molal.
To still freeze at -12° C, then the molality of the solution 12/ 1.86 = 6.45 moles
The molecular weight of sorbitol (C6H14O6)is:
6 C = 6 ×12 = 72
14 H = 14 × 1 = 14
6 O = 6 × 16 = 96
...giving a total of 182
So one mole of sorbitol has a mass of 182 grams.
Since there are 2 kg of water, 2 × 6.45 moles = 12.9 moles can be added to the water to get the 12° C freezing point depression.
Therefore
grams = moles × molar mass
12.9 moles × 182 grams / mole = 2,347.8 grams of sorbitol can be added and still freeze
The meaning of electrolysis-chemical decomposition produced by passing an electric current through a liquid or solution containing ions. Alternating- occur in turn repeatedly.
Answer:
A bond in which the electronegativity difference between the atoms is between 0.4 and 1.7 is called a polar covalent bond.
A polar covalent bond is a covalent bond in which the atoms have an unequal attraction for electrons and so the sharing is unequal.