Nature of Reactant and Rate of Reaction

Q. Why is the reaction of steam with red hot iron is considered a reversible reaction.

Q. ${\text{AH}}_2\text{(g)}+{\text{BV}}_2{\text{O}}_5\text{(s)}\to {\text{CV}}_2{\text{O}}_3\text{(s)}+{\text{DH}}_2\text{O(l)}$

A, B, C and D are the coefficients in the reaction given above. Identify the correct relation between these coefficients so that the reaction is balanced?

1. A = D, B = C, 5B = 3C + D
2. A = D, B = 2C, 5B = 3C + D
3. A = 2D, B = C, 5B = 3C + D
4. 2A = 2D, 2B = 2D, 2C = D

Q. The oxidation number of manganese in $Mn{O}_4^{-}$ is

1. 7

Q. $H_2\left(g\right)+V_2{O}_5\left(s\right)\to V_2{O}_3\left(s\right)+H_{2}O\left(l\right)$
Let the coefficients for the given reaction be as follows:
$A{H}_2\left(g\right)+B{V}_2{O}_5\left(s\right)\to C{V}_2{O}_3\left(s\right)+D{H}_{2}O\left(l\right)$
What will be the equations for the number of atoms each element, so that each is balanced?

1. A = D, B = C, 5B = 3C + D
2. A = D, B = 2C, 5B = 3C + D
3. A = 2D, B = C, 5B = 3C + D
4. 2A = 2D, 2B = 2D, 2C = D

Q.

When sodium and zinc were made to react individually with dilute hydrochloric acid then the reaction was much faster in the case of sodium. Which of the following factor had an influence on the rate of the reaction?

1. The surface area of the reactant
2. The nature of the reactant
3. The concentration of the reactant
4. The pressure of the gases

Q. The oxidation number of manganese in $Mn{O}_4^{-}$ is

1. 7

Q.

Sodium, calcium, magnesium, and zinc were taken in four test tubes having dilute hydrochloric acid. In which test tube the rate of the reaction will be faster?

1. Test tube having zinc
2. Test tube having sodium
3. Test tube having magnesium
4. Test tube having calcium

Q. For the given reaction,

$3Fe\left(s\right)+x{H}_{2}O\left(l\right)\to F{e}_3{O}_4\left(s\right)+4H_2\left(l\right)$

What should be the values of x so that it is balanced?

1. 4

Q. The oxidation number of manganese in $Mn{O}_4^{-}$ is

1. 7

Q. For the given reaction,

$3Fe\left(s\right)+x{H}_{2}O\left(l\right)\to F{e}_3{O}_4\left(s\right)+4H_2\left(l\right)$

What should be the values of x so that it is balanced?

1. 4

Q.

The nature of the reactant is one of the factors which affects the rate of the reaction.

1. True

2. False

Q.

Choose the correct option regarding the statements given below:

Statements 1: The rate of the reaction is faster in case of potassium than in the case of magnesium.

Statement 2: Magnesium is more reactive than potassium.

1. Both statements are correct and statement (ii) is the reason for statement (i).
2. Statement (i) is incorrect but statement (ii) is correct.
3. Statement (i) is correct and statement (ii) is incorrect.
4. Both statements are incorrect.

Q. For the given reaction,

$3Fe\left(s\right)+x{H}_{2}O\left(l\right)\to F{e}_3{O}_4\left(s\right)+4H_2\left(l\right)$

What should be the value of x so that it is balanced?