Which of the following is NOT a redox reaction?
2HNO2 + 2HI → 2H2O + 2NO + I2
Zn + H2SO4 → ZnSO4 + H2
Ca(HCO3)2 → CaCO3 + H2O + CO2
4FeO + O2 → 2Fe2O3
2Na + Cl2 → 2NaCl
Correct answer is C
Ca(HCO2) → CaCO3 + H2O + CO2 is not a redox reaction
Which of the following combinations of conditions may increase the rate of a chemical reaction?
Decrease in temperature, increase in concentration of the reactants
Increase in temperature, addition of a catalyst, decrease in the surface area of the reactants
Increase in temperature, increase in concentration, addition of a catalyst and increase in the surface area of the reactants
Decrease in temperature concentration and surface area of the reactants
Additionof a catalyst and in the absence of light
Correct answer is C
Increase in temperature, increase in concentration, increase the rate of chemical reaction
40 g
20 g
10 g
4 g
2 g
Correct answer is D
No explanation has been provided for this answer.
0.5
1.0
2.0
3.0
4.0
Correct answer is B
No explanation has been provided for this answer.
H2SO4
AgNO3
HNO3
NH3
HCl
Correct answer is B
No explanation has been provided for this answer.