Sulphuric Acid

Q.

When Copper is heated with $\mathrm{Conc}.{\mathrm{HNO}}_3$, it produces-

Q.

In acid solution, the reaction ${{\mathrm{MnO}}_4}^{-}\to {\mathrm{Mn}}^{2+}$ involves

Q. In the following sequence of reactions,
$Z\stackrel{PC{l}_5}{\to }X\stackrel{\text{Alc. KOH}}{\to }Y\underset{\left(ii\right)H_{2}O,\text{boil}}{\overset{\left(i\right)\text{conc.}{H}_{2}S{O}_4}{\to }}Z$
$Z$ is:

1. $(C{H}_3{)}_{3}CC{H}_{2}OH$
2. $C{H}_{3}C{H}_{2}C{H}_{2}OH$
3. $C{H}_{3}CHOHC{H}_3$
4. $C{H}_{3}C{H}_{2}C{H}_{2}C{H}_{2}OH$

Q.

Which of the following acids is not found in acid rain?

1. Carbonic acid

2. Suluric acid

3. Nitric acid

4. None of the above

Q. Which of the following reactions of methane is incomplete combustion?

1. $C{H}_4+O_2\to C\left(s\right)+2H_{2}O\left(l\right)$
2. $C{H}_4+2O_2\to C{O}_2\left(g\right)+2H_{2}O\left(l\right)$
3. $C{H}_4+O_2\stackrel{M{o}_2{O}_3}{\to }HCHO+H_{2}O$
4. $2C{H}_4+O_2\underset{100atm}{\overset{Cu,523K}{\to }}2C{H}_{3}OH$

Q. The amount of heat evolved when one mole of ${\text{H}}_2{\text{SO}}_4$ reacts with two moles of $\text{NaOH}$ is:

1. $13.7\text{k cal}$
   
2. More than $13.7\text{k cal}$
   
3. Less than $13.7\text{k cal}$
   
4. Cannot say

Q.

Assertion : For drying $H_{2}S$, Conc. $H_{2}S{O}_4$ cannot be used.

Reason: Moist $H_{2}S$ is oxidized by Conc.$H_{2}S{O}_4$

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. Identify the correct formula of oleum from the following :

1. $H_2{S}_2{O}_7$
2. $H_{2}S{O}_3$
3. $H_{2}S{O}_4$
4. $H_2{S}_2{O}_8$

Q.

Give the balanced equations for reactions of aqueous ammonia with the following:
Zinc sulphate

Q.

Given below are two statements:

Statement 1:${\mathrm{CeO}}_2$ can be used for oxidation of aldehyde and ketones.

Statement 2: Aqueous solution of ${\mathrm{EuSO}}_4$ is a strong reducing agent.

1. Statement 1 is true, statement 2 is false

2. Statement 1 is false , statement 2 is true

3. Both statement 1 and statement 2 are false

4. Both statement 1 and statement 2 are true

Q.

Identify the amphoteric oxide from the following?

1. Aluminium oxide (${\mathrm{Al}}_2{\mathrm{O}}_3$)

2. Sulphur dioxide (${\mathrm{SO}}_2$)

3. Phosphorous pentaoxide (${\mathrm{P}}_2{\mathrm{O}}_5$)

4. Calcium oxide ($\mathrm{CaO}$)

Q.

Identify the anion present in the following compound:

When barium chloride solution is added to solution E, a white precipitate insoluble in dilute hydrochloric acid is obtained.

Q. The ozonolysis of $(C{H}_3{)}_{2}C=C(C{H}_3{)}_2$ followed by treatment with Zinc and water will give

1. acetone
2. acetaldehyde and acetone
3. acetic acid
4. formal dehyde

Q.

Why is Bromine water brown?

Q.

Is ${\mathrm{Sb}}_2{\mathrm{O}}_3$ Amphoteric?

Q.

Write balanced chemical equation for Zinc nitrate crystals are heated

Q. Why in esterification reaction oh part is removed from carboxylic acid

Q.

State the conditions required for the following reaction to take place, Catalytic oxidation of Ammonia to Nitric oxide .

Q.

Sulphuric acid is manufactured by:

1. Contact process

2. Haber's process

3. Ostwald's process

4. Dow's process

Q.

When HNO3 is dropped into the palm and washed with water it turns yellow It’s shows the presence of

NO2

NO

N2O

N2O5

Q.

What would you observe in the following case:

Concentrated Sulphuric acid is added dropwise to the crystals of hydrated Copper Sulphate.

Q.

Chlorine water on standing loses its yellow colour due to the formation of:

1. HCl

2. HOCl

3. Both HCl and HOCl

4. COCl₂

Q.

Name:

The acid that produces sugar charcoal from sugar.

Q.

What do you call the substance broken down by electrolysis?

Q.

Hydrogen chloride gas is highly soluble in water and is dried by:

1. Anhydrous calcium chloride

2. Phosphorous pentaoxide

3. Quick lime

4. Concentrated sulphuric acid

Q. There is a loss in mass when mixture of Li2CO3 and Na2CO3 . 10H2O is heated strongly . The loss is due to :

Q. Concentrated aqueous sulphuric acid is 98%H2so4 (w/v) and has density of 1.80 gm per lit. Molarity of sol.

Q.

Which of the following reagent reacts with aldehyde to give silver mirror test?

1. Tollen's reagent

2. Potassium nitrate solution

3. Benedict's solution

4. Fehling's solution

Q.

When Sodium amalgam (an alloy with mercury) is dipped into cold water, what reaction takes place?

Q.

Describe what happens when ethanol is warmed with acidified potassium dichromate solution. Give the name and structural formula of one organic compound formed in this reaction.