Ammonia

Q.

How does Phenol React with Ammonia?

Q.

What is the action of the Nesslers reagent on ammonia?

1. Brown ppt.

2. Blue ppt.

3. Black ppt.

4. Green ppt.

Q. If we have a pure $C{H}_{3}OH$ sample and it contains a total of 6000 hydrogen atoms, find the number of $C{H}_{3}OH$ molecules present in the sample.

1. 1200
2. 1000
3. 1500
4. 800

Q. If we have a $FeS{O}_4.7H_{2}O$ sample and it contains a total of 2233 oxygen atoms, then find the number of formula units of $FeS{O}_4.7H_{2}O$ present in the sample.

1. 210
2. 203
3. 233
4. 103

Q. Find the number of electrons present in a pure sample of $(N{H}_4{)}_{2}S{O}_4$ containing 8 moles of $O$-atoms?

1. $8.43\times {10}^{25}$
2. $8.34\times {10}^{25}$
3. $6.43\times {10}^{25}$
4. $5.34\times {10}^{25}$

Q. Calcium Cyanamide on hydrolysis gives ammonia – True or False?

1. True
2. False

Q. A metal $X$ on heating in nitrogen gas gives $Y$. $Y$ on treatment with $H_{2}O$ gives a colourless gas $Z$. $Z$ when passed through chloroplatinic acid produces a yellow precipitate. $‘Z^{\prime }$ is

1. $Mg(N{O}_3{)}_2$
2. $M{g}_3{N}_2$
3. ${NH}_3$
4. $MgO$

Q. For drying ammonia gas sulphuric acid is used as dehydrating agent – True or False?

1. True
2. False

Q. $H-N-H$ bond angle in $N{H}_3$ is than/to $H-P-H$ bond angle in $P{H}_3$.

1. greater
2. less
3. equal

Q.

Ammonia forms a large number of complexes with transition metal ions. Hybridisation easily explains the case of sigma donation capability of $N{H}_3$ and $P{H}_3$.
Choose the correct statement from the following:

1. Between $N{H}_3$ and $P{H}_3,N{H}_3$ is a better electron donor because the lone pair of electrons occupies spherical 's' orbital and is less directional.

2. Between $N{H}_3$ and $P{H}_3,N{H}_3$ is a better electron donor because the lone pair of electrons occupies $s{p}^3$-orbital and is more directional.

3. Electron density on N is higher than that on P and hence NH₃ acts as a better base than PH₃ .

4. P-H bonds are more polar than N-H bonds.The smaller size of N makes NH₃ a good Lewis acid.

Q. Which of the following are properties of $N{H}_3$?

1. $N{H}_3$ is a Lewis acid and soluble in water
2. $N{H}_3$ is a Lewis base and insoluble in water
3. $N{H}_3$ is a Lewis base and soluble in water
4. $N{H}_3$ is a Lewis acid and insoluble in water

Q.

Ammonia is manufactured by the:

1. Frasch process

2. Deacon process

3. Solvay process

4. None of the above

Q. When excess of $C{l}_2$ reacts with ammonia, the products formed are:

1. $N{H}_{3}and{N}_2$
2. $NC{l}_{3}andHCl$
3. $NC{l}_{3}and{N}_2$
4. $N{H}_{4}Cland{N}_2$

Q. The temporary hardness of water due to calcium bicarbonate can be removed by adding:

1. $Ca(OH{)}_2$
2. $CaC{l}_2$
3. $HCl$
4. $CaC{O}_3$

Q. $N{H}_3$ can be obtained by

1. Heating $N{H}_{4}N{O}_2$
2. Heating $N{H}_{4}Cl$
3. Heating $N{H}_{4}N{O}_2$ with $NaOH$
4. The reaction of $AlN$ with $H_{2}O$