Odd Electron Bond

Q. Which of the following molecules is not an odd electron species?

1. $H_{2}O$
2. $N{O}_2$
3. $NO$
4. $Cl{O}_2$

Q. The correct statement(s) regarding diborane $\left(B_2{H}_6\right)$ is/are:

1. Maximum six hydrogen atoms can lie in a plane
2. Maximum six atoms can lie in a plane
3. Bridging $B-H_b$ bond is longer than terminal $B-H_t$ bond
4. Terminal $H_t-B-H_t$ bond angle is greater than bridging $H_b-B-H_b$ bond angle

Q. The number of unbonded electrons present on N in NO is

1. 2
2. 3
3. 4

Q. The correct statement regarding diborane $\left(B_2{H}_6\right)$ given below:

1. Maximum six hydrogen atoms can lie in a plane
2. Maximum six atoms can lie in a plane
3. Bridging $H_b-B-H_b$ bond is longer than terminal $B-H_t$ bond
4. Terminal $H_t-B-H_t$ bond angle is greater than bridging $H_b-B-H_b$ bond angle

Q. A perfect crystal of silicon in the given figure is doped with some elements as given in the options. Which of these options show $n$-type semiconductors?

1. 
2. 
3. 
4. 

Q. How many maximum atoms lie in the same plane in the structure of methylenesuphurtetrafluoride $\left(C{H}_{2}S{F}_4\right)$?

Q. The number of unbonded electrons present on N in NO is

1. 2
2. 3
3. 4

Q. An element $X$ belongs to $3^{rd}$ period and group $16$ of the Modern Periodic Table.
Determine the number of valence electrons and the valency of X?

Q. The number of d-electron in $F{e}^{2+}$ ( at. no. of Fe = 26) is not equal to that of the

1. p - electrons in Ne (at. no. = 10)
2. s - electrons in Mg (at. no. = 12)
3. d - electrons in Fe
4. p-electrons in $C{l}^{-}$ ( at. no. Cl = 17)

Q. The number of unbonded electrons present on N in NO is

1. 2
2. 3
3. 4

Q. Select correct statement about $B_2{H}_6$ :

1. bridging groups are electron deficient with 12 valence electrons
2. it has $2c-2e$ $B-H$ bonds
3. it has $3c-2e$ $B-H$ bonds
4. all of above are correct statements

Q.

How many unbonded electrons are present on N in NO?

1. 2

2. 3

3. 4

4. 5

Q. An n-type semi-conductor is formed when a trace amount of impurity is added to silicon. The number of valence electrons in the impurity atom must be:

1. $3$
2. $5$
3. $2$
4. $1$