Statement I : The oxidation state of Cr in $A l_{2} (C r_{2} O_{7})_{3}$ is +3.
Statement II : as a neutral compound, the sum of oxidation numbers of all the atoms must equal zero.

Statement 1 and Statement 2 are correct and Statement 2 is the correct explanation of Statement 1

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Both the Statement 1 and Statement 2 are correct and Statement 2 is NOT the correct explanation of Statement 1

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Statement 1 is correct but Statement 2 is not correct

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Statement 1 is not correct but Statement 2 is correct

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Both the Statement 1 and Statement 2 are not correct.

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is D Statement 1 is not correct but Statement 2 is correct
Oxidation state of $A l$ is $+ 3$ . And oxidation number of $O$ is $- 2$ . Thus, oxidation state of $C r$ can be calculated by considering it as $X$ . Thus-
( $2$ $$ $3$ ) $+$ $6 X$ $+$ [ $21$ $$ ( $- 2$ )] $=$ $0$
The value of $X$ obtained is $+ 6$ . Oxidation state of $C r$ in the above mentioned molecule is $+ 6$ .
In a neutral compound, the sum of oxidation numbers of all the atoms must be equal to zero. If it's not zero, it can't be neutral.
Thus, statement 1 is not correct. Statement 2 is correct.
Option $D$ is the correct answer.

Suggest Corrections

Similar questions

Q. Statement 1: Peat produces less heat and more smoke

Statement 2 : The calorific value of peat is between 10.5-14.63 KJ/g.

Q. Choose the correct option based on the statements given:

Statement 1: Carbon always share electrons to form a covalent bond with other elements.

Statement 2:

C^{4 +}

and

C^{4 -}

ions are highly unstable.

Choose the correct option.

Statement $1 : (p \land \sim q) \land (\sim p \land q)$ is a fallacy.

Statement $2 : (p \Rightarrow q) \Leftrightarrow (\sim q \Rightarrow\sim p)$ is a tautology.

Statement1: In absence of air, projectile motion is always a 2D motion.
Statement2: In absence of any external force in 3D space, at any time during its flight Projectile's velocity has only two components.

Q. Statement - 1 : For a particle undergoing rectilinear motion with constant acceleration, the average velocity cannot be equal for two different time intervals.
Statement -2 : The average velocity of particle moving with constant acceleration in a time interval is

\frac{\to u + \to v}{2}

,
where

\to u

is the initial velocity and

\to v

is the final velocity.

Join BYJU'S Learning Program

Statement I : The oxidation state of Cr in Al2(Cr2O7)3 is +3.Statement II : as a neutral compound, the sum of oxidation numbers of all the atoms must equal zero.

Statement I : The oxidation state of Cr in $A l_{2} (C r_{2} O_{7})_{3}$ is +3.
Statement II : as a neutral compound, the sum of oxidation numbers of all the atoms must equal zero.