10223 + Interview Questions in Chemistry Page 138 InterviewSolution

6851.	Explain the following : When an incense stick is lighted in the corner of a room, its fragrance spreads quickly in the entire room.
Answer» Explain the following : When an incense stick is lighted in the corner of a room, its fragrance spreads quickly in the entire room.

6851.

Explain the following : When an incense stick is lighted in the corner of a room, its fragrance spreads quickly in the entire room.

Answer»

Explain the following :

When an incense stick is lighted in the corner of a room, its fragrance spreads quickly in the entire room.

6852.	Question 25. Match the chemical substances given in Column I with their appropriate application given in Column II. (a) A - (2) B - (1) C - (4) D - (3) (b) A - (3) B - (2) C - (4) D - (1) (c) A - (3) B - (4) C - (1) D - (2) (a) A - (2) B - (4) C - (1) D - (3)
Answer» Question 25. Match the chemical substances given in Column I with their appropriate application given in Column II. (a) A - (2) B - (1) C - (4) D - (3) (b) A - (3) B - (2) C - (4) D - (1) (c) A - (3) B - (4) C - (1) D - (2) (a) A - (2) B - (4) C - (1) D - (3)

Discussion

6853.	What is the meaning of volatile and non volatile ?
Answer» What is the meaning of volatile and non volatile ?

Discussion

6854.	What happens when you place a deshelled boiled egg and shelled raw egg in water?
Answer» What happens when you place a deshelled boiled egg and shelled raw egg in water?

Discussion

6855.	Assertion: A liquid-gas mixture is separated by boiling. Reason: The solubility of a gas in a liquid decreases with increase in temperature.
Answer» Assertion: A liquid-gas mixture is separated by boiling. Reason: The solubility of a gas in a liquid decreases with increase in temperature.

6855.

Assertion: A liquid-gas mixture is separated by boiling. Reason: The solubility of a gas in a liquid decreases with increase in temperature.

Answer»

Assertion: A liquid-gas mixture is separated by boiling.

Reason: The solubility of a gas in a liquid decreases with increase in temperature.

Discussion

6856.	Question 9(a) What is the mass of: (a)0.2 mole of oxygen atoms?
Answer» Question 9(a) What is the mass of: (a)0.2 mole of oxygen atoms?

Discussion

6857.	What are bose Einstein condensate and plasma?How they could be obtained?With examples
Answer» What are bose Einstein condensate and plasma?How they could be obtained?With examples

Discussion

6858.	Why is the concept of gram atoms only applicable for polyatomic elements?
Answer» Why is the concept of gram atoms only applicable for polyatomic elements?

Discussion

6859.	The expression for the solubility product of Al2(SO4)3 is
Answer» The expression for the solubility product of $A l_{2} (S O_{4})_{3}$ is

Discussion

6860.	Why is there a bracket in Ca(OH) but not in Al2O3
Answer» Why is there a bracket in Ca(OH) but not in Al2O3

Discussion

6861.	If the pressure of the reacting species decreases then
Answer» If the pressure of the reacting species decreases then

Discussion

6862.	Question 21 Will 35Cl and 37Cl have different valencies? Justify your answer.
Answer» Question 21 Will $_{35} C l$ and $_{37} C l$ have different valencies? Justify your answer.

Discussion

6863.	Which of the following are the limitations of Rutherford’s experiment? (i) Rutherford couldn't explain how many electrons rotate in a particular orbit. (ii) Rutherford was not able to explain the stability of an atom. (iii) Rutherford couldn't explain why electrons undergo acceleration and radiate energy. (iv) Rutherford couldn't explain the presence of nucleus.
Answer» Which of the following are the limitations of Rutherford’s experiment? (i) Rutherford couldn't explain how many electrons rotate in a particular orbit. (ii) Rutherford was not able to explain the stability of an atom. (iii) Rutherford couldn't explain why electrons undergo acceleration and radiate energy. (iv) Rutherford couldn't explain the presence of nucleus.

Discussion

6864.	An atomic mass unit is defined as precisely ___ the mass of one atom of carbon-12 isotope.
Answer» An atomic mass unit is defined as precisely ___ the mass of one atom of carbon-12 isotope.

Discussion

6865.	Which of the following are polyatomic ions?
Answer» Which of the following are polyatomic ions?

Discussion

6866.	Question 2 What effect does the concentration of H+ (aq) ions have on the nature of the solution?
Answer» Question 2 What effect does the concentration of $H^{+}$ (aq) ions have on the nature of the solution?

Discussion

6867.	Question 2 (b) What is the physical state of water at: b.100∘C ?
Answer» Question 2 (b) What is the physical state of water at: $b . 100^{\circ} C$ ?

Discussion

6868.	Which of the following statements are true?
Answer» Which of the following statements are true?

Discussion

6869.	What type of change takes place when a sodium hydroxide pellet is added to water?
Answer» What type of change takes place when a sodium hydroxide pellet is added to water?

Discussion

6870.	What is mean by Cryoscopic study?
Answer» What is mean by Cryoscopic study?

Discussion

6871.	Explain boyle's Law on the basis of the kinetic theory of matter.
Answer» Explain boyle's Law on the basis of the kinetic theory of matter.

Discussion

6872.	Which of the following statements is correct?
Answer» Which of the following statements is correct?

Discussion

6873.	One mole of a gas occupies ___ L at S.T.P.
Answer» One mole of a gas occupies ___ L at S.T.P.

Discussion

6874.	For the redox reaction MnO4- + C2O42- + H+ → Mn2+ + CO2 + H2O The correct coefficients of the reactants for the balanced reaction are:
Answer» For the redox reaction MnO₄^- + C₂O₄^2- + H⁺ → Mn²⁺ + CO₂ + H₂O The correct coefficients of the reactants for the balanced reaction are:

6874.

For the redox reaction MnO4- + C2O42- + H+ → Mn2+ + CO2 + H2O The correct coefficients of the reactants for the balanced reaction are:

Answer»

For the redox reaction

MnO₄^- + C₂O₄^2- + H⁺ → Mn²⁺ + CO₂ + H₂O

The correct coefficients of the reactants for the balanced reaction are:

Discussion

6875.	Why is it not possible to see an atom even with the most powerful microscope?
Answer» Why is it not possible to see an atom even with the most powerful microscope?

Discussion

6876.	Burning of a substance is an example of:
Answer» Burning of a substance is an example of:

Discussion

6877.	Write a short note on plasma (3 marks)
Answer» Write a short note on plasma (3 marks)

Discussion

6878.	Which one of the following statements is correct about isotopes?
Answer» Which one of the following statements is correct about isotopes?

Discussion

6879.	Is air a mixture or a compound? Give three reasons for your answer.
Answer» Is air a mixture or a compound? Give three reasons for your answer.

Discussion

6880.	Do we sweat more on dry day or humid day ?? Justify your answer.
Answer» Do we sweat more on dry day or humid day ?? Justify your answer.

Discussion

6881.	How did Avagadro come up about the number 6.022*10 raised to 23
Answer» How did Avagadro come up about the number 6.022*10 raised to 23

Discussion

6882.	Lead cannot be used in preparation of hydrogen using dilute acids. Why?
Answer» Lead cannot be used in preparation of hydrogen using dilute acids. Why?

Discussion

6883.	What is polar solvent and what is non polar solvent?
Answer» What is polar solvent and what is non polar solvent?

Discussion

6884.	What is the mass of 5 miles of sodium carbonate
Answer» What is the mass of 5 miles of sodium carbonate

Discussion

6885.	Want to know more about plasma and BEC
Answer» Want to know more about plasma and BEC

Discussion

6886.	Which gas is one of the Primary gases responsible for the deterioration of the Taj Mahal?
Answer» Which gas is one of the Primary gases responsible for the deterioration of the Taj Mahal?

Discussion

6887.	Among the following, which element reacts with hydrogen to form a compound A and on treatment with water liberates hydrogen gas?
Answer» Among the following, which element reacts with hydrogen to form a compound A and on treatment with water liberates hydrogen gas?

Discussion

6888.	State 3 difference between atoms and molecules
Answer» State 3 difference between atoms and molecules

Discussion

6889.	What happens when Mercuric chloride reacts with pottasium iodide
Answer» What happens when Mercuric chloride reacts with pottasium iodide

6889.

What happens when Mercuric chloride reacts with pottasium iodide

Answer»

What happens when

Mercuric chloride reacts with pottasium iodide

Discussion

6890.	A pharmacist has 30% and 80% sulphuric acid solution, using which he needs to make 8 litres of a 50% sulphuric acid solution. How many litres of the 80% solution will he need?
Answer» A pharmacist has 30% and 80% sulphuric acid solution, using which he needs to make 8 litres of a 50% sulphuric acid solution. How many litres of the 80% solution will he need?

Discussion

6891.	Among the following elements element with highest ionisation enthalpy is:
Answer» Among the following elements element with highest ionisation enthalpy is:

Discussion

6892.	Which of the following apparatus is used in the assembly for fractional distillation process?
Answer» Which of the following apparatus is used in the assembly for fractional distillation process?

Discussion

6893.	Why ice float on water?
Answer» Why ice float on water?

Discussion

6894.	In Rutherford's alpha particle scattering experiment, when fast moving alpha particles were made to fall on a thin gold foil then most of the alpha particles passed straight through the foil. Which of the given conclusion is correct?
Answer» In Rutherford's alpha particle scattering experiment, when fast moving alpha particles were made to fall on a thin gold foil then most of the alpha particles passed straight through the foil. Which of the given conclusion is correct?

6894.

In Rutherford's alpha particle scattering experiment, when fast moving alpha particles were made to fall on a thin gold foil then most of the alpha particles passed straight through the foil. Which of the given conclusion is correct?

Answer»

In Rutherford's alpha particle scattering experiment, when fast moving alpha particles were made to fall on a thin gold foil then most of the alpha particles passed straight through the foil. Which of the given conclusion is correct?

Discussion

6895.	Name the element other than carbon which shows allotrophy
Answer» Name the element other than carbon which shows allotrophy

Discussion

6896.	In the case of real gases, the equation of state, PV = RT (where P, V and T are respectively the pressure, volume and absolute temperature), is strictly satisfied only if corrections are applied to the measured pressure P and the measured volume V. The corrections for P and V arise respectively due to
Answer» In the case of real gases, the equation of state, PV = RT (where P, V and T are respectively the pressure, volume and absolute temperature), is strictly satisfied only if corrections are applied to the measured pressure P and the measured volume V. The corrections for P and V arise respectively due to

Discussion

6897.	The chemical bond that is formed between two combining atoms by mutual sharing of one or more pairs of electrons is called a ___.
Answer» The chemical bond that is formed between two combining atoms by mutual sharing of one or more pairs of electrons is called a ___.

Discussion

6898.	How many covalent bond(s) is/are present in an oxygen molecule?
Answer» How many covalent bond(s) is/are present in an oxygen molecule?

Discussion

6899.	In what respects do the three isotopes of hydrogen differ ? Give their structures.
Answer» In what respects do the three isotopes of hydrogen differ ? Give their structures.

Discussion

6900.	When hydrogen gas (H2) is passed over copper oxide (CuO), copper (Cu) is produced along with water (H2O). The balanced chemical equation for the given reaction is Which substance is oxidized in the given reaction?
Answer» When hydrogen gas (H₂) is passed over copper oxide (CuO), copper (Cu) is produced along with water (H₂O). The balanced chemical equation for the given reaction is Which substance is oxidized in the given reaction?

6900.

When hydrogen gas (H2) is passed over copper oxide (CuO), copper (Cu) is produced along with water (H2O). The balanced chemical equation for the given reaction is Which substance is oxidized in the given reaction?

Answer»

When hydrogen gas (H₂) is passed over copper oxide (CuO), copper (Cu) is produced along with water (H₂O). The balanced chemical equation for the given reaction is

Which substance is oxidized in the given reaction?

Discussion

Explore topic-wise InterviewSolutions in .

Explain the following : When an incense stick is lighted in the corner of a room, its fragrance spreads quickly in the entire room.

Question 25. Match the chemical substances given in Column I with their appropriate application given in Column II. (a) A - (2) B - (1) C - (4) D - (3) (b) A - (3) B - (2) C - (4) D - (1) (c) A - (3) B - (4) C - (1) D - (2) (a) A - (2) B - (4) C - (1) D - (3)

What is the meaning of volatile and non volatile ?

What happens when you place a deshelled boiled egg and shelled raw egg in water?

Assertion: A liquid-gas mixture is separated by boiling. Reason: The solubility of a gas in a liquid decreases with increase in temperature.

Question 9(a) What is the mass of: (a)0.2 mole of oxygen atoms?

What are bose Einstein condensate and plasma?How they could be obtained?With examples

Why is the concept of gram atoms only applicable for polyatomic elements?

The expression for the solubility product of Al2(SO4)3 is

Why is there a bracket in Ca(OH) but not in Al2O3

If the pressure of the reacting species decreases then

Question 21 Will 35Cl and 37Cl have different valencies? Justify your answer.

An atomic mass unit is defined as precisely ___ the mass of one atom of carbon-12 isotope.

Which of the following are polyatomic ions?

Question 2 What effect does the concentration of H+ (aq) ions have on the nature of the solution?

Question 2 (b) What is the physical state of water at: b.100∘C ?

Which of the following statements are true?

What type of change takes place when a sodium hydroxide pellet is added to water?

What is mean by Cryoscopic study?

Explain boyle's Law on the basis of the kinetic theory of matter.

Which of the following statements is correct?

One mole of a gas occupies ___ L at S.T.P.

For the redox reaction MnO4- + C2O42- + H+ → Mn2+ + CO2 + H2O The correct coefficients of the reactants for the balanced reaction are:

Why is it not possible to see an atom even with the most powerful microscope?

Burning of a substance is an example of:

Write a short note on plasma (3 marks)

Which one of the following statements is correct about isotopes?

Is air a mixture or a compound? Give three reasons for your answer.

Do we sweat more on dry day or humid day ?? Justify your answer.

How did Avagadro come up about the number 6.022*10 raised to 23 ​​​​​​​

Lead cannot be used in preparation of hydrogen using dilute acids. Why?

What is polar solvent and what is non polar solvent?

What is the mass of 5 miles of sodium carbonate

Want to know more about plasma and BEC

Which gas is one of the Primary gases responsible for the deterioration of the Taj Mahal?

Among the following, which element reacts with hydrogen to form a compound A and on treatment with water liberates hydrogen gas?

State 3 difference between atoms and molecules

What happens when Mercuric chloride reacts with pottasium iodide

A pharmacist has 30% and 80% sulphuric acid solution, using which he needs to make 8 litres of a 50% sulphuric acid solution. How many litres of the 80% solution will he need?

Among the following elements element with highest ionisation enthalpy is:

Which of the following apparatus is used in the assembly for fractional distillation process?

Why ice float on water?

In Rutherford's alpha particle scattering experiment, when fast moving alpha particles were made to fall on a thin gold foil then most of the alpha particles passed straight through the foil. Which of the given conclusion is correct?

Name the element other than carbon which shows allotrophy

The chemical bond that is formed between two combining atoms by mutual sharing of one or more pairs of electrons is called a ___.

How many covalent bond(s) is/are present in an oxygen molecule?

In what respects do the three isotopes of hydrogen differ ? Give their structures.

When hydrogen gas (H2) is passed over copper oxide (CuO), copper (Cu) is produced along with water (H2O). The balanced chemical equation for the given reaction is Which substance is oxidized in the given reaction?

How did Avagadro come up about the number 6.022*10 raised to 23