Nitrogen Dioxide

Q.

Is oxygen paramagnetic or diamagnetic?

Q. Which of the following depicts the accurate magnetic character of $N{O}_2$?

1. Paramagnetic
2. Diamagnetic
3. Ferromagnetic
4. None of these

Q. At low temperature, say below $(-{11}^{\circ }C)$ nitrogen dioxide exist as a trimer.

1. True
2. False

Q. Which among the following oxide gives two oxyacids in water?

1. $N{O}_2$
2. $N_2{O}_3$
3. $NO$
4. $P_4{O}_{10}$

Q. How many allotropes do oxygen have?

1. 10
2. 9
3. 20
4. 11

Q. $\left(N{H}_4{)}_{2}C{r}_2{O}_7\right(s)\to C{r}_2{O}_3(s)$ + .................. + ................

1. Nitrogen, steam
2. Nitrogen, oxygen
3. Water, nitrogen oxide
4. None of the above

Q. The correct order of magnetic moments (spin only values in (B.M.) among the following is:

1. $[MnC{l}_4{]}^{2-}>[Fe(CN{)}_6{]}^{4-}>[CoC{l}_4{]}^{2-}$
2. $[MnC{l}_4{]}^{2-}>[CoC{l}_4{]}^{2-}>Fe(CN{)}_6{]}^{4-}$
3. $\left[Fe\right(CN{)}_6{]}^{4-}>[MnC{l}_4{]}^{2-}>[CoC{l}_4{]}^{2-}$
4. $\left[Fe\right(CN{)}_6{]}^{4-}>[CoC{l}_4{]}^{2-}>[MnC{l}_4{]}^{2-}$

Q. Out of $\left[Fe\right(CN{)}_6{]}^{4-},\left[Ni\right(CN{)}_4{]}^{2-}$ and $\left[Ni\right(CO{)}_4]$ :

1. all have identical geometry
2. all are paramagnetic
3. all are diamagnetic
4. $\left[Fe\right(CN{)}_6{]}^{4-}$ is diamagnetic but $\left[Ni\right(CN{)}_4{]}^{2-}$ and $\left[Ni\right(CN{)}_4]$ are paramagnetic

Q. When a sample of baking soda is strongly ignited in a crucible, it suffered a loss is the weight of $3.1$g. The mass of baking soda is:

1. $16.8$g
2. $8.4$g
3. $11.6$g
4. $4.2$g

Q. "Phosphorus can be estimated by converting it into phosphates and then precipitating as $MgN{H}_{4}P{O}_4$." Answer whether the above statement is true or false.
If true enter 1, else enter 0.

Q. In the decomposition of oxalic acid following data were obtained.

Time (second)	0	300	600
Volume of $KMn{O}_4$ used in mL	22.0	17.0	13.4

If reaction obeys 1st order kinetics then determine the rate constant K and half-life period:

1. None of these
2. $8.43\times {10}^{-4}sec,13.7minute$
3. $86\times {10}^{-4}sec,134.3minute$
4. $8.6\times {10}^{-5}sec,1.343minute$

Q. Assertion :$FeC{l}_3$ and $FeC{l}_2$ exist in dimer form in vapor phase. Reason: In dimer form, they have $(3C-4e^{-})$ bond.

1. Assertion is true, Reason is true and Reason is correct explanation for Assertion.
2. Assertion is true, Reason is true and Reason is not the correct explanation for Assertion.
3. Assertion is true, Reason is false.
4. Assertion is false, Reason is true.

Q. Which of the following molecules is/are dimagnetic ?

1. $B_2$
2. $C_2$
3. $N_2$
4. $L{i}_2$

Q. Which of the following pairs of molecules will have permanent dipole moments for both members?

1. $N{O}_{2}andC{O}_2$
2. $N{O}_{2}and{O}_3$
3. $Si{F}_{4}andN{O}_2$
4. $Si{F}_{4}andC{O}_2$

Q. A salt on heating with $dil.H_{2}S{O}_4$ and subsequently treatment with a few drops of dilute $K_{2}C{r}_2{O}_7$ turns into green solution. The salt may be a :

1. Sulphate
2. Nitrate
3. Sulphite
4. Chromate

Q. Which of the following is/are true for $B_2$ and $C_2$ molecules according to M.O.T?

1. Both are having same bond length
2. Both are having different bond order
3. Both are having 1 $\sigma$ and 1 $\pi$ bond
4. $B_2$ is paramagnetic and $C_2$ is diamagnetic in nature

Q.

Who discovered tungsten

Q. Assertion :$O_2$ is a stronger reducing agent than $F_2$. Reason: $F_2$ is more electronegative.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Which of the following is paramagnetic in nature?

1. N${}_2$O${}_4$
2. N${}_2$
3. NO
4. N${}_2$O${}_3$

Q. A process designed to remove organic sulphur from coal prior to combustion involves the reaction.
$X-S-Y+2NaOH\to X-O-Y+N{a}_{2}S+H_{2}O$
$CaC{O}_3\to CaO+C{O}_2$
$N{a}_{2}S+C{O}_2+H_{2}O\to N{a}_{2}C{O}_3+H_{2}S$
$CaO+H_{2}O\to Ca(OH{)}_2$
$N{a}_{2}C{O}_3+Ca(OH{)}_2\to CaC{O}_3+2NaOH$
In the processing of 320 metric tons of a coal having 1.0% sulphur content, how much limestone $\left(CaC{O}_3\right)$must be edecomposed to provide enough $Ca(OH{)}_2$ to regenerate the NaOH used in the original leaching step?

1. 4.0 metric ton
2. 2.0 metric ton
3. 8.0 metric ton
4. 10.0 metric ton

Q. In the given substances which pair form mixture of X, Y?

1. Sand, sawdust
2. Iodine, sand
3. Iron, sulphur
4. Gun powder

Q. When $1$ mole of sulfur burns to form $S{O}_2$, $1300$ calories are released. When $1$ mole of sulfur burns to form $S{O}_3,3600$ calories are released. What is $△H$ when $1$ mole of $S{O}_2$ burns to form $S{O}_3$?

1. $3900cal$
2. $-1950cal$
3. $1000cal$
4. $-500cal$
5. $-2300cal$

Q. Intramolecular hydrogen bond is not present in:

1. salicylaldehyde
2. o-fluoro phenol
3. o-nitro phenol
4. p-nitro phenol

Q. Assertion :1 mole of 90% limestone on complete decomposition produce 50 g of $C{O}_2$. Reason: Stoichiometric coefficients for $CaC{O}_3$ and $C{O}_2$ in the reaction are 1 and 1 each.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Assertion is incorrect but Reason is correct

Q. How many unpaired $e^{-}$ are present in [Ni(CN)${}_4$]${}^{2-}$ ?

1. 0
2. 2
3. 1
4. 3

Q. Assertion :$O_2$ gas is affected in magnetic field. Reason: It has north and south pole.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Concentrated nitric acid, upon long standing, turns yellow-brown due to the formation of:

1. $N_2{O}_4$
2. $NO$
3. $N_{2}O$
4. $N{O}_2$

Q. At low temperature, say below $(-{11}^{\circ }C)$ nitrogen dioxide exist as a trimer.

1. True
2. False

Q.

Which oxide of nitrogen is paramagnetic?

1. Nitrogen dioxide

2. Dinitrogen trioxide

3. Nitrous oxide

4. Dinitrogen pentoxide

Q. What is the normality of 1 M solution of $H_{3}P{O}_4$?

1. 3 N
2. 4 N
3. 2 N
4. 0.1 N