Contact Process

Q. Which of the following statements is not valid for oxoacids of phosphorus?

1. Orthophosphoric acid is used in the manufacture of triple superphosphate
2. Hypophosphorus acid is a diprotic acid
3. All oxoacids contain tetrahedral four co-ordinated phosphorus
4. All oxoacids of phosphorus contain at least one P=O unit and one P-OH group.

Q. In which of the following oxoacids of sulphur, peroxy linkage is present?
[0.77 Mark]

1. $H_2{S}_2{O}_6$
2. $H_{2}S{O}_4$
3. $H_2{S}_2{O}_7$
4. $H_2{S}_2{O}_8$

Q.

Given below are two statements:

Statement 1: ${\mathrm{H}}_2{\mathrm{O}}_2$ can act as both oxidising and reducing agents in the basic medium.

Statement 2: In the hydrogen economy, energy is transmitted in the form of dihydrogen.

In the light of the above statements, choose the correct ans: from the options given below:

1. Statement 1 is false but statement 2 is true

2. Both statement 1 and statement 2 is true

3. Statement 1 is true but statement 2 is false

4. Both statement 1 and statement 2 are false

Q. The dissociation of nitrogen pentaoxide is a first order reaction. In first 24 min, 75% of nitrogen pentaoxide is dissociated. What amount of nitrogen pentaoxide will be left behind after one hour of the start of reaction?

1. Approximately 2%
2. Approximately 3%
3. None
4. Approximately 1%

Q.

Define Nitrating Agents.

Q. The following two reactions are known
$F{e}_2{O}_{3\left(s\right)}+3C{O}_{\left(g\right)}\to 2F{e}_{\left(s\right)}+3C{O}_{2\left(g\right)};\Delta H=-26.8kJ$

$Fe{O}_{\left(s\right)}+C{O}_{\left(g\right)}\to F{e}_{\left(s\right)}+C{O}_{2\left(g\right)};\Delta H=-16.5kJ$

The value of $\Delta H$ for the following reaction

$F{e}_2{O}_{3\left(s\right)}+C{O}_{\left(g\right)}\to 2Fe{O}_{\left(s\right)}+C{O}_{2\left(g\right)}$ is

1. +10.3 kJ
2. -43.3 kJ
3. -10.3 kJ
4. +6.2 kJ

Q. When benzene is treated with carbon monoxide and hydrogen chloride in the presence of anhydrous aluminium chloride, it gives

1. Benzoic acid
2. Benzaldehyde
3. Benzoyl chloride
4. Phenol

Q. Ozone reacts with nitric oxide to form:

1. $NO$
2. $N{O}_2$
3. $N_2{O}_3$
4. $N_2{O}_5$

Q.

What is the role of $\mathrm{Fe}{\left(\mathrm{OH}\right)}_3$ in the contact process?

Q.

Write balanced equations for the action of concentrated sulphuric acid on carbon.

Q.

How does Siemen"s ozonizer convert oxygen to ozone?

Q. In neutral medium, ozone reacts with potassium iodide to give:

1. $KOH$
2. $O_2$
3. $I_2$
4. All of the above

Q.

Describe the manufucature of $H_{2}S{O}_4$ by contact process,

Q. What are the conditions of formation of carbonic acid?

Q.

______________ozoniser is commonly used for preparation of ozone.

Q.

Write the balanced chemical equation for the reaction of Sulphuric acid with

(ⅰ ) Potassium bicarbonate

(ⅱ) Sodium sulphate

(ⅱⅰ) Iron (ll) sulphide

Q.

Write the balanced chemical equation. Reaction of concentrated sulphuric acid with carbon.

Q. While preparing dilute sulphuric acid from concentrated sulphuric acid in the laboratory, the concentrated sulphuric acid is added slowly to water with constant stirring. Explain why ?

Q.

Write balanced chemical equation of the following

Dehydrating Cane sugar with concentrated sulphuric acid.

Q.

Show oxidizing nature of ${\mathrm{HNO}}_3$.

Q. why do the acid not show acidic behaviour in the absence of water?

Q.

Give balanced equation for each of the following
Dehydration of concentrated sulphuric acid with sugar crystals.

Q. The catalyst used in contact process is:

1. $A{l}_2{O}_3$
2. $C{r}_2{O}_3$
3. $V_2{O}_3$
4. $Mn{O}_2$

Q.

Type of electric discharge used in Siemens ozoniser = ________.

Q. Assertion :In the Contact process, sulphur trioxide vapours are absorbed in concentrated sulphuric add and not in water to obtain sulphuric acid. Reason: Directly dissolving sulphur trioxide in water is not possible due to highly exothermic nature of the reaction. Acidic vapors are formed. Oleum is reacted with water to form conc. sulphuric ac

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. Catalyst used in contact process is:

1. All of the above
2. platinum
3. ferric oxide $+$ copper oxide
4. vanadium pentoxide

Q. The acidic oxides formed when carbon reacts conc. $H_{2}S{O}_4$

1. 
2. 
3. 
4. 

Q.

State your observation when concentrated sulfuric acid is added to sugar crystals?

Q. What is the main principle of sulphuric acid production by lead chamber process?

1. Moist $S$ in presence of nitrogenous oxides (active catalyst) is oxidized to sulphur trioxide which is oxidised to sulphuric acid
2. Moist $S{O}_2$ in presence of nitrogenous oxides is oxidized to sulphur monoxide which reacts water to produce sulphuric acid
3. Moist $S$ in presence of nitrogenous oxides is oxidized to sulphur trioxide which reacts water to produce sulphuric acid
4. Moist $S{O}_2$ in presence of nitrogenous oxides is oxidized to sulphur trioxide which reacts water to produce sulphuric acid

Q. Write balanced chemical equations to show how $S{O}_3$ is converted to Sulphuric acid at the contact process.