The oxidation number of Fe in [Fe(CN)\(_6\)]\(^{3-}\) is
+3
+2
-2
-3
Correct answer is A
Let the oxidation number of Fe in the compound [Fe(CN)\(_6\)]\(^{3-}\) be x.
x + 6(-1) = -3
x - 6 = -3;
x = -3 + 6
x = +3
l and lll only
ll and lll only
l and ll only
l, ll and lll
Correct answer is C
No explanation has been provided for this answer.
Particle size of CuO(s)
Concentration of H2SO4(aq)
Temperature of the reacting mixture
Pressure of reaction system
Correct answer is D
The reaction rate between a solid and liquid will not be affected by pressure. Pressure majorly affects the reaction rate for gases.
A spot of oil paint on a shirt can best be removed using?
brine
detergent
kerosine
warm water
Correct answer is C
To remove oil paints, the use of chemicals is usually required, including turpentine, acetone, kerosene, and various paint thinners.
The hydrolysis of NH\(_4\)CI gives
an acidic solution
an alkaline solution
a buffer solution
a neutral solution
Correct answer is A
When you dissolve ammonium chloride crystals in water (H\(_2\)O), the ammonium chloride compound decomposes into its component ions: NH\(_4 ^+\) and Cl\(^-\). The reaction of these ions with water gives an acidic solution.