Ammonia

Q.

Write the balanced chemical equation for the following reaction:

Reaction of Ammonia with Sulphuric acid.

Q.

How do you test for Chloride?

Q.

Oxidation Number Of Pb In PbSO4

Q.

How many atoms are present in an (i) ${\mathrm{H}}_2\mathrm{S}$ molecule and (ii) ${{\mathrm{PO}}_4}^{-3}$ion?

Q.

What is the standard Enthalpy of the formation of ${\mathrm{NH}}_3$ gas?

${\mathrm{N}}_2\left(\mathrm{g}\right)+3{\mathrm{H}}_2\left(\mathrm{g}\right)\to 2{\mathrm{NH}}_3\left(\mathrm{g}\right){∆}_{\mathrm{r}}\mathrm{H}°=-92.2\mathrm{kJ}{\mathrm{mol}}^{-1}$

Q.

Give a balanced chemical equation for the following: Reaction of ammonia with nitric acid.

Q. No of lone pair in NH3

Q.

Oxidation State Of S In H2SO3 Is________.

Q.

The reaction which produces yellow precipitate is

1. $\underset{\mathrm{Sodium}\mathrm{hydroxide}}{\mathrm{NaOH}\left(\mathrm{aq}\right)}+\underset{\mathrm{Hydrochloric}\mathrm{acid}}{\mathrm{HCl}\left(\mathrm{aq}\right)}\to \underset{\mathrm{Sodium}\mathrm{chloride}}{\mathrm{NaCl}\left(\mathrm{s}\right)}+\underset{\mathrm{Water}}{{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)}$

2. $\underset{\mathrm{Sodium}\mathrm{hydroxide}}{2\mathrm{NaOH}\left(\mathrm{aq}\right)}+\underset{\mathrm{Barium}\mathrm{chloride}}{{\mathrm{BaCl}}_2\left(\mathrm{aq}\right)}\to \underset{\mathrm{Barium}\mathrm{hydroxide}}{\mathrm{Ba}{\left(\mathrm{OH}\right)}_2\left(\mathrm{s}\right)}+\underset{\mathrm{Sodium}\mathrm{chloride}}{2\mathrm{NaCl}\left(\mathrm{aq}\right)}$

3. $\underset{\mathrm{Lead}\mathrm{nitrate}}{\mathrm{Pb}{\left({\mathrm{NO}}_3\right)}_2\left(\mathrm{aq}\right)}+\underset{\mathrm{Potassium}\mathrm{iodide}}{2\mathrm{KI}\left(\mathrm{aq}\right)}\to \underset{\mathrm{Potassium}\mathrm{nitrate}}{2{\mathrm{KNO}}_3\left(\mathrm{aq}\right)}+\underset{\mathrm{Lead}\mathrm{iodide}}{{\mathrm{PbI}}_2\left(\mathrm{s}\right)}$

4. $\underset{\mathrm{Copper}\mathrm{oxide}}{\mathrm{CuO}\left(\mathrm{s}\right)}+\underset{\mathrm{Magnesium}}{\mathrm{Mg}\left(\mathrm{s}\right)}\to \underset{\mathrm{Copper}}{\mathrm{Cu}\left(\mathrm{s}\right)}+\underset{\mathrm{Magnesium}\mathrm{oxide}}{\mathrm{MgO}\left(\mathrm{s}\right)}$

5. $\underset{\mathrm{Iron}}{4\mathrm{Fe}\left(\mathrm{s}\right)}+\underset{\mathrm{Oxygen}}{3{\mathrm{O}}_2\left(\mathrm{g}\right)}\to \underset{\mathrm{Iron}\mathrm{oxide}}{2{\mathrm{Fe}}_2{\mathrm{O}}_3\left(\mathrm{s}\right)}$

Q.

The increasing tendncy of ionic character is-

1. NaBr < KCl < LiI < CsF

2. CsF < KCl < NaBr < LiI

3. LiI < NaBr < KCl < CsF

4. LiI < KCl < CsF < NaBr.

Q.

17. Relation between relative lowering of vapour pressure and molar mass.

Q. What is hypervalent molecule?

Q.

Copper sulphate is soluble in water

1. True
2. False

Q. Is urea a polar molecular solid or H-bonded molecular solid?

Q. Which one of the following molecules will form a linear polymeric structure due to hydrogen bonding?

1. 
2. 
3. 
4. 

Q. Alkaline earth metals dissolve in liquid ammonia to form bright blue coloured solutions in dilution because of

1. Solvated ions

2. Solvated electrons

3. unsolvated ions

4. unsolvated electrons

Q.

Warming ammonium sulfate with sodium hydroxide solution gives ___ gas

Q. The electro-negativities of F, Cl, Br and I, are 4.0, 3.0, 2.8, 2.5 respectively. The hydrogen halide with a high percentage of ionic character is

1. HBr
2. HI
3. HF
4. HCI

Q. Assertion
In water, orthoboric acid behaves as a weak monobasic acid.

Reason
In water, orthoboric acid acts as a proton donor.

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.

How is $\left({\mathrm{H}}_2\mathrm{S}\right)$ used as an analytical reagent?

Q. Assertion: In crystal lattice, the size of the cation is larger in a tetrahedral hole than in an octahedral hole.
Reason: The Cations occupy more space than anions in crystal packing.

1. If both assertion and reason are true and the reason is the correct explanation of the assertion.
2. If both assertion and reason are true but reason is not the correct explanation of the assertion.
3. If assertion is true but reason is false.
4. If the assertion and reason both are false.

Q.

Is Silver Chloride Soluble In Water?

Q.

$1.2\mathrm{g}$ of an organic compound on Kjeldahl method liberates ammonia which consumes $30c{m}^3$ of $1\mathrm{N}$ $\mathrm{HCl}$. The percentage of nitrogen in the organic compound is?

Q.

29.5 mg of an organic compound containing nitrogen was digested according to Kjeldahls method and the evolved ammonia was absorbed in 20 mL of 0.1M HCl solution. The excess of the acid required 15 mL of 0.1 M NaOH solution for complete neutralization. The percentage of nitrogen in the compound is

1. $59.0$

2. $47.4$

3. $23.7$

4. $29.5$

Q. The geometries of the ammonia complexes of $N{i}^{2+},P{t}^{2+}\text{and}Z{n}^{2+},$ respectively, are :

1. octahedral, square planar and tetrahedral
2. square planar, octahedral and tetrahedral
3. tetrahedral, square planar and octahedral
4. octahedral, tetrahedral and square planar

Q. Surface tension decreases with increase in ___.

1. temperature
2. addition of surface active solutes
3. none of these

Q.

Account on the statement:

Ethylamine is soluble in water, whereas aniline is insoluble.

Q. Ammonia is soluble in water because it forms hydrogen bonds with water.

1. True
2. False

Q.

(i) Name the other ion formed when ammonia dissolves in water.
(ii) Give one test that can be used to detect the presence of the ion produced.