10223 + Interview Questions in Chemistry Page 35 InterviewSolution

1701.	33 Which of the folowing is correct ?1)A real gas approaches ideal gas behaviour at low pressure and high temperature 2)Liquifaction of a real gas is possible at low temp and high pressure 3)Both of them 4)None of them
Answer» 33 Which of the folowing is correct ?1)A real gas approaches ideal gas behaviour at low pressure and high temperature 2)Liquifaction of a real gas is possible at low temp and high pressure 3)Both of them 4)None of them

Discussion

1702.	The oxidation state of oxygen in KO3, Na2O2 are respectively :
Answer» The oxidation state of oxygen in $K O_{3}$ , $N a_{2} O_{2}$ are respectively :

Discussion

1703.	A Solution is prepared by dissolving 5 g of urea in 95 g of water . What is mass by mass percentage of urea in the solution ?
Answer» A Solution is prepared by dissolving 5 g of urea in 95 g of water . What is mass by mass percentage of urea in the solution ?

Discussion

1704.	Calculate the time taken for the consumption of reactant if the rate of the reaction is 10 g/ min and the amount of reactant consumed is 2 g.
Answer» Calculate the time taken for the consumption of reactant if the rate of the reaction is 10 g/ min and the amount of reactant consumed is 2 g.

Discussion

1705.	While diluting a solution of salt in water, a student by mistake added methanol(boiling point 64.7∘C). What technique can be employed to get back the methanol?Justify your choice.
Answer» While diluting a solution of salt in water, a student by mistake added methanol(boiling point 64.7 $^{\circ}$ C). What technique can be employed to get back the methanol? Justify your choice.

Discussion

1706.	What are the differences between physical and chemical changes?
Answer» What are the differences between physical and chemical changes?

Discussion

1707.	What are the characteristics of mixtures?
Answer» What are the characteristics of mixtures?

Discussion

1708.	Question 2TableName of the elementSymbolNumber of protonsNumber of neutronsNumber of electronsOxygenO888SulphurS161616With the help of table, find out the mass number of oxygen and sulphur atom.
Answer» Question 2 Table $\begin{matrix} Name of the element & Symbol & Number of protons & Number of neutrons & Number of electrons Oxygen & O & 8 & 8 & 8 Sulphur & S & 16 & 16 & 16 \end{matrix}$ With the help of table, find out the mass number of oxygen and sulphur atom.

Discussion

1709.	The composition of two atomic particles is given below : XYProtons:88Neutrons:89Electrons:88 (i) What is the mass number of X ? (ii) What is the mass number of Y ? (iii) What is the relation between X and Y ? (iv) which element/elements do they represent?
Answer» The composition of two atomic particles is given below : $\begin{matrix} X & Y Protons : & 8 & 8 Neutrons : & 8 & 9 Electrons : & 8 & 8 \end{matrix}$ (i) What is the mass number of X ? (ii) What is the mass number of Y ? (iii) What is the relation between X and Y ? (iv) which element/elements do they represent?

1709.

The composition of two atomic particles is given below : XYProtons:88Neutrons:89Electrons:88 (i) What is the mass number of X ? (ii) What is the mass number of Y ? (iii) What is the relation between X and Y ? (iv) which element/elements do they represent?

Answer»

The composition of two atomic particles is given below :

$\begin{matrix} X & Y Protons : & 8 & 8 Neutrons : & 8 & 9 Electrons : & 8 & 8 \end{matrix}$

(i) What is the mass number of X ?

(ii) What is the mass number of Y ?

(iii) What is the relation between X and Y ?

(iv) which element/elements do they represent?

Discussion

1710.	Which of the following hydrocarbons undergo addition reactions?
Answer» Which of the following hydrocarbons undergo addition reactions?

Discussion

1711.	Why some of the elements have fractional atomic masses?
Answer» Why some of the elements have fractional atomic masses?

Discussion

1712.	Question 19The teacher instructed three students 'A'. 'B' and 'C' respectively to prepare a 50% (mass by volume) solution of sodium hydroxide (NaOH). A' dissolved 50g of NaOH in 100 mL of water. 'B' dissolved 50g of NaOH in 100g of water while C dissolved 50g of NaOH in water to make 100 mL of solution. Which one of them has made the desired solution and why?
Answer» Question 19 The teacher instructed three students 'A'. 'B' and 'C' respectively to prepare a 50% (mass by volume) solution of sodium hydroxide (NaOH). A' dissolved 50g of NaOH in 100 mL of water. 'B' dissolved 50g of NaOH in 100g of water while C dissolved 50g of NaOH in water to make 100 mL of solution. Which one of them has made the desired solution and why?

Discussion

1713.	When an ideal gas is compressed (a) reversibly or (b) irreversibly from volume Vi to Vf . why w(reverssible) is less than w(irreversible)
Answer» When an ideal gas is compressed (a) reversibly or (b) irreversibly from volume Vi to Vf . why w(reverssible) is less than w(irreversible)

Discussion

1714.	State the 3 rules that have to be followed when we write the electronic configuration of an atom using the Quantum Mechanical model.
Answer» State the 3 rules that have to be followed when we write the electronic configuration of an atom using the Quantum Mechanical model.

Discussion

1715.	What is meant by dymention
Answer» What is meant by dymention

Discussion

1716.	for same energy find the ratio of wavelength of photon and wavelength of electron
Answer» for same energy find the ratio of wavelength of photon and wavelength of electron

Discussion

1717.	How to find radicals of any element?
Answer» How to find radicals of any element?

Discussion

1718.	how si unit of temperature is kelvin?explain
Answer» how si unit of temperature is kelvin?explain

Discussion

1719.	31 A 20 ml sample of a 0.2 M solution of the weak diprotic acid H2A is titrated with 0.25 M NaOH. Then molarity of solution at second equivalent point is: 1) 0.1 M NaHA 2) 0.153 M Na2A 3) 0.1 M Na2A 4) 0.0769 M Na2A
Answer» 31 A 20 ml sample of a 0.2 M solution of the weak diprotic acid H2A is titrated with 0.25 M NaOH. Then molarity of solution at second equivalent point is: 1) 0.1 M NaHA 2) 0.153 M Na2A 3) 0.1 M Na2A 4) 0.0769 M Na2A

Discussion

1720.	The hydrogen electrode is dipped in a solution of pH=3 at 25 ∘C. The potential would be:(Take 2.303×RTF=0.059 V)
Answer» The hydrogen electrode is dipped in a solution of $p H = 3$ at $25^{\circ} C$ . The potential would be: (Take $\frac{2.303 \times R T}{F} = 0.059 V)$

Discussion

1721.	Which of the following 0.10 M aqueous solution will have the lowest freezing point.
Answer» Which of the following 0.10 M aqueous solution will have the lowest freezing point.

Discussion

1722.	Why is atomic mass in 'u equal to molar mass in grams?
Answer» Why is atomic mass in 'u equal to molar mass in grams?

Discussion

1723.	According to Law of conservation of mass, mass of reactants wil be equal to the mass of:
Answer» According to Law of conservation of mass, mass of reactants wil be equal to the mass of:

Discussion

1724.	What is obtained when a metal oxide of the highly reactive metals react with water?
Answer» What is obtained when a metal oxide of the highly reactive metals react with water?

Discussion

1725.	Copper oxide is heated with hydrogen to form copper metal & water. Which one is the oxidizing agent?
Answer» Copper oxide is heated with hydrogen to form copper metal & water. Which one is the oxidizing agent?

Discussion

1726.	The pressure of the gas in a closed vessel is increased by 0.4 percentage heated by 1 Degree Celsius the initial temperature of the gas
Answer» The pressure of the gas in a closed vessel is increased by 0.4 percentage heated by 1 Degree Celsius the initial temperature of the gas

Discussion

1727.	What is the mass (in grams) of 3 moles of N atoms?
Answer» What is the mass (in grams) of 3 moles of N atoms?

Discussion

1728.	Which curve does not represent Boyle's law ?
Answer» Which curve does not represent Boyle's law ?

Discussion

1729.	1 What is the hybridisation of nitrogen in pyrrole, pyridine, pepridini, pyrimidine.
Answer» 1 What is the hybridisation of nitrogen in pyrrole, pyridine, pepridini, pyrimidine.

Discussion

1730.	Arrange the given metals in the decreasing order of their reactivity.Aluminium, sodium, gold, copper, and iron.
Answer» Arrange the given metals in the decreasing order of their reactivity. Aluminium, sodium, gold, copper, and iron.

Discussion

1731.	Write few useful properties of plastics.
Answer» Write few useful properties of plastics.

Discussion

1732.	What is dimension of relative density?
Answer» What is dimension of relative density?

Discussion

1733.	What will the following yield in reaction with HIPh-ch2-o-Ph
Answer» What will the following yield in reaction with HI Ph-ch2-o-Ph

Discussion

1734.	Q.Nucleus of mass number A, originally at rest, emits the α particle with speed v. The daughter nucleus recoils with a speed of?
Answer» Q.Nucleus of mass number A, originally at rest, emits the α particle with speed v. The daughter nucleus recoils with a speed of?

Discussion

1735.	Example of solution of gas in liquid
Answer» Example of solution of gas in liquid

Discussion

1736.	How phosphorous acid has basicity of 2 although it has 3 hydrogen ions?
Answer» How phosphorous acid has basicity of 2 although it has 3 hydrogen ions?

Discussion

1737.	why Co2+ is more stable than Ni2+ in aqueous medium?
Answer» why Co2+ is more stable than Ni2+ in aqueous medium?

Discussion

1738.	How to find the valency of a polyatomic ion??
Answer» How to find the valency of a polyatomic ion??

Discussion

1739.	Which of the following shows the correct relationship between the pressure P and density ρ of an ideal gas at constant temperature?
Answer» Which of the following shows the correct relationship between the pressure $P$ and density $ρ$ of an ideal gas at constant temperature?

Discussion

1740.	Are relative atomic masses of elements whole numbers?
Answer» Are relative atomic masses of elements whole numbers?

Discussion

1741.	Which of the following methods can be used for preventing corrosion?
Answer» Which of the following methods can be used for preventing corrosion?

Discussion

1742.	Question 21 Classify each of the following on the basis of their atomicity (a) F2 (b) NO2 (c) N2O (d) C2H6 (e) P4 (f) H2O2 (g) P4O10 (h) O3 (i) HCI (j) CH4 (k) He (l) Ag
Answer» Question 21 Classify each of the following on the basis of their atomicity (a) $F_{2}$ (b) $N O_{2}$ (c) $N_{2} O$ (d) $C_{2} H_{6}$ (e) $P_{4}$ (f) $H_{2} O_{2}$ (g) $P_{4} O_{10}$ (h) $O_{3}$ (i) $H C I$ (j) $C H_{4}$ (k) $H e$ (l) $A g$

Discussion

1743.	Question 10Give examples to show that plastics are non-corrosive in nature.
Answer» Question 10 Give examples to show that plastics are non-corrosive in nature.

Discussion

1744.	The crystalline salt Na_{2 }SO_{4 }.xH_{2 }O on heating loses 55.9% of its mass and becomes anhydrous. What is the formula of crystalline salt?
Answer» The crystalline salt Na_{2 }SO_{4 }.xH_{2 }O on heating loses 55.9% of its mass and becomes anhydrous. What is the formula of crystalline salt?

Discussion

1745.	Soda water is an example of A) Heterogeneous mixture B) solute C) suspension D) solutions. Ans with an explanation thank u
Answer» Soda water is an example of A) Heterogeneous mixture B) solute C) suspension D) solutions. Ans with an explanation thank u

1745.

Soda water is an example of A) Heterogeneous mixture B) solute C) suspension D) solutions. Ans with an explanation thank u

Answer»

Soda water is an example of
A) Heterogeneous mixture

B) solute

C) suspension

D) solutions. Ans with an explanation thank u

Discussion

1746.	Explain chromatography in brief with the help of a diagram
Answer» Explain chromatography in brief with the help of a diagram

Discussion

1747.	Is there any difference between semi permeability and complete permeability?
Answer» Is there any difference between semi permeability and complete permeability?

Discussion

1748.	If number of electrons in an atom is 8 and number of protons is also 8, then (i) What is the atomic number of the atom? (ii) What is the charge on the atom?
Answer» If number of electrons in an atom is 8 and number of protons is also 8, then (i) What is the atomic number of the atom? (ii) What is the charge on the atom?

Discussion

1749.	राजा रवि वर्मा, मकबूल फिदा हुसैन, अमृता शेरगिल के प्रसिद्ध चित्रों का एक अलबम बनाइए। सहायता के लिए इंटरनेट या किसी आर्ट गैलरी से संपर्क करें।
Answer» राजा रवि वर्मा, मकबूल फिदा हुसैन, अमृता शेरगिल के प्रसिद्ध चित्रों का एक अलबम बनाइए। सहायता के लिए इंटरनेट या किसी आर्ट गैलरी से संपर्क करें।

Discussion

1750.	How can we liquify gases?
Answer» How can we liquify gases?

Discussion

Explore topic-wise InterviewSolutions in .

33 Which of the folowing is correct ?1)A real gas approaches ideal gas behaviour at low pressure and high temperature 2)Liquifaction of a real gas is possible at low temp and high pressure 3)Both of them 4)None of them

The oxidation state of oxygen in KO3, Na2O2 are respectively :

A Solution is prepared by dissolving 5 g of urea in 95 g of water . What is mass by mass percentage of urea in the solution ?

Calculate the time taken for the consumption of reactant if the rate of the reaction is 10 g/ min and the amount of reactant consumed is 2 g.

While diluting a solution of salt in water, a student by mistake added methanol(boiling point 64.7∘C). What technique can be employed to get back the methanol?Justify your choice.

What are the differences between physical and chemical changes?

What are the characteristics of mixtures?

Question 2TableName of the elementSymbolNumber of protonsNumber of neutronsNumber of electronsOxygenO888SulphurS161616With the help of table, find out the mass number of oxygen and sulphur atom.

The composition of two atomic particles is given below : XYProtons:88Neutrons:89Electrons:88 (i) What is the mass number of X ? (ii) What is the mass number of Y ? (iii) What is the relation between X and Y ? (iv) which element/elements do they represent?

Which of the following hydrocarbons undergo addition reactions?

Why some of the elements have fractional atomic masses?

When an ideal gas is compressed (a) reversibly or (b) irreversibly from volume Vi to Vf . why w(reverssible) is less than w(irreversible)

State the 3 rules that have to be followed when we write the electronic configuration of an atom using the Quantum Mechanical model.

What is meant by dymention

for same energy find the ratio of wavelength of photon and wavelength of electron

How to find radicals of any element?

how si unit of temperature is kelvin?explain

31 A 20 ml sample of a 0.2 M solution of the weak diprotic acid H2A is titrated with 0.25 M NaOH. Then molarity of solution at second equivalent point is: 1) 0.1 M NaHA 2) 0.153 M Na2A 3) 0.1 M Na2A 4) 0.0769 M Na2A

The hydrogen electrode is dipped in a solution of pH=3 at 25 ∘C. The potential would be:(Take 2.303×RTF=0.059 V)

Which of the following 0.10 M aqueous solution will have the lowest freezing point.

Why is atomic mass in 'u equal to molar mass in grams?

According to Law of conservation of mass, mass of reactants wil be equal to the mass of:

What is obtained when a metal oxide of the highly reactive metals react with water?

Copper oxide is heated with hydrogen to form copper metal &amp; water. Which one is the oxidizing agent?

The pressure of the gas in a closed vessel is increased by 0.4 percentage heated by 1 Degree Celsius the initial temperature of the gas

What is the mass (in grams) of 3 moles of N atoms?

Which curve does not represent Boyle's law ?

1 What is the hybridisation of nitrogen in pyrrole, pyridine, pepridini, pyrimidine.

Arrange the given metals in the decreasing order of their reactivity.Aluminium, sodium, gold, copper, and iron.

Write few useful properties of plastics.

What is dimension of relative density?

What will the following yield in reaction with HIPh-ch2-o-Ph

Q.Nucleus of mass number A, originally at rest, emits the α particle with speed v. The daughter nucleus recoils with a speed of?

Example of solution of gas in liquid

How phosphorous acid has basicity of 2 although it has 3 hydrogen ions?

why Co2+ is more stable than Ni2+ in aqueous medium?

How to find the valency of a polyatomic ion??

Which of the following shows the correct relationship between the pressure P and density ρ of an ideal gas at constant temperature?

Are relative atomic masses of elements whole numbers?

Which of the following methods can be used for preventing corrosion?

Question 21 Classify each of the following on the basis of their atomicity (a) F2 (b) NO2 (c) N2O (d) C2H6 (e) P4 (f) H2O2 (g) P4O10 (h) O3 (i) HCI (j) CH4 (k) He (l) Ag

Question 10Give examples to show that plastics are non-corrosive in nature.

The crystalline salt Na_{2 }SO_{4 }.xH_{2 }O on heating loses 55.9% of its mass and becomes anhydrous. What is the formula of crystalline salt?

Soda water is an example of A) Heterogeneous mixture B) solute C) suspension D) solutions. Ans with an explanation thank u

Explain chromatography in brief with the help of a diagram

Is there any difference between semi permeability and complete permeability?

If number of electrons in an atom is 8 and number of protons is also 8, then ​(i) What is the atomic number of the atom? (ii) What is the charge on the atom?

How can we liquify gases?

Copper oxide is heated with hydrogen to form copper metal & water. Which one is the oxidizing agent?

If number of electrons in an atom is 8 and number of protons is also 8, then (i) What is the atomic number of the atom? (ii) What is the charge on the atom?