10223 + Interview Questions in Chemistry Page 176 InterviewSolution

8751.	Which of the following is not regraded as a pollutant?
Answer» Which of the following is not regraded as a pollutant?

Discussion

8752.	does copper sulphate and blue vitriol are same ?
Answer» does copper sulphate and blue vitriol are same ?

Discussion

8753.	How does pressure affect the boiling any melting/freezing point of a substance ?
Answer» How does pressure affect the boiling any melting/freezing point of a substance ?

Discussion

8754.	1) zinc carbonate= zinc oxide+ carbon dioxide 2) potassium bromide+ barium iodide = potassium iodide + barium bromide Balance the equations
Answer» 1) zinc carbonate= zinc oxide+ carbon dioxide 2) potassium bromide+ barium iodide = potassium iodide + barium bromide Balance the equations

8754.

1) zinc carbonate= zinc oxide+ carbon dioxide 2) potassium bromide+ barium iodide = potassium iodide + barium bromide Balance the equations

Answer»

1) zinc carbonate= zinc oxide+ carbon dioxide

2) potassium bromide+ barium iodide = potassium iodide + barium bromide

Balance the equations

Discussion

8755.	Why are gases so easily compressible whereas it is almost impossible to compress a solid or a liquid?
Answer» Why are gases so easily compressible whereas it is almost impossible to compress a solid or a liquid?

Discussion

8756.	A student, while testing the solubility of potassium nitrate at 313k, found that the solubility is 62 in 100g of water. What masses of potassium nitrate would be needed to produce a saturated solution of potassium nitrate in 50g of water at 1313k?
Answer» A student, while testing the solubility of potassium nitrate at 313k, found that the solubility is 62 in 100g of water. What masses of potassium nitrate would be needed to produce a saturated solution of potassium nitrate in 50g of water at 1313k?

Discussion

8757.	What is the formula for copper (II) oxide?
Answer» What is the formula for copper (II) oxide?

Discussion

8758.	Which one of the following statements is incorrect?
Answer» Which one of the following statements is incorrect?

Discussion

8759.	Magnesium is two times heavier than C-12 atom, what shall be the mass of Mg atom in terms of atomic mass unit?
Answer» Magnesium is two times heavier than C-12 atom, what shall be the mass of Mg atom in terms of atomic mass unit?

Discussion

8760.	Choose the part that has an error Instead of crying/over spilled milk/, you had better try to/ sort out your differences first./No error.
Answer» Choose the part that has an error Instead of crying/over spilled milk/, you had better try to/ sort out your differences first./No error.

Discussion

8761.	Define the term isotope with a suitable example.
Answer» Define the term isotope with a suitable example.

Discussion

8762.	How many atoms of oxygen are there in 4.4g of CO2
Answer» How many atoms of oxygen are there in 4.4g of CO₂

Discussion

8763.	What is the electronic configuration of a hydrogen atom?
Answer» What is the electronic configuration of a hydrogen atom?

Discussion

8764.	48.67 % (w/W) HCl stock solution has a density of 1.5gmL−1. The molecular weight of HCl is 36.5gmol−1.The volume (mL) of stock required to prepare 200 mL of 0.4 M HCl is: ___
Answer» 48.67 % (w/W) HCl stock solution has a density of $1.5 g m L^{- 1} .$ The molecular weight of HCl is $36.5 g m o l^{- 1} .$ The volume (mL) of stock required to prepare 200 mL of 0.4 M HCl is: ___

Discussion

8765.	What happens to the rate of reaction if the pressure of the reacting system increases?
Answer» What happens to the rate of reaction if the pressure of the reacting system increases?

Discussion

8766.	To make a saturated solution,36 g of sodium chloride is dissolved in 100 g of water at 293K. Find its concentration at the temperature.
Answer» To make a saturated solution,36 g of sodium chloride is dissolved in 100 g of water at 293K. Find its concentration at the temperature.

Discussion

8767.	Student paper 2 solutions, a solution of alum and a solution of fine sand in water . Distinguish between the two on the basis of transparency and stability.
Answer» Student paper 2 solutions, a solution of alum and a solution of fine sand in water . Distinguish between the two on the basis of transparency and stability.

Discussion

8768.	Why atomic masses are only calculated in relative atomic masses reason out
Answer» Why atomic masses are only calculated in relative atomic masses reason out

Discussion

8769.	Which one of the following metals can displace copper from copper sulphate solution?
Answer» Which one of the following metals can displace copper from copper sulphate solution?

Discussion

8770.	If we consider 16, in place of 112, the mass of carbon atom to be the relative atomic mass unit, the mass of one mole of substance will: (A) be a function of the molecular mass of the substance (B) remain unchanged (C) increase two fold (D) decrease twice
Answer» If we consider $\frac{1}{6}$ , in place of $\frac{1}{12}$ , the mass of carbon atom to be the relative atomic mass unit, the mass of one mole of substance will: (A) be a function of the molecular mass of the substance (B) remain unchanged (C) increase two fold (D) decrease twice

Discussion

8771.	Why nitric acid is not used is not used for the preparation of hydrogen gas?
Answer» Why nitric acid is not used is not used for the preparation of hydrogen gas?

Discussion

8772.	State one major drawback of Rutherford's model.
Answer» State one major drawback of Rutherford's model.

Discussion

8773.	CrO3 dissoloves in aqueous NaOH to give :
Answer» $C r O_{3}$ dissoloves in aqueous NaOH to give :

Discussion

8774.	Question 1 (g) Which separation techniques will you apply for the separation of the following? g. Tea leaves from tea.
Answer» Question 1 (g) Which separation techniques will you apply for the separation of the following? g. Tea leaves from tea.

Discussion

8775.	Question 9(a) Five solutions A, B, C, D and E when tested with universal indicator showed pH as 4, 1, 11, 7 and 9, respectively. Which solution is (a) neutral? Arrange the pH in increasing order of hydrogen-ion concentration.
Answer» Question 9(a) Five solutions A, B, C, D and E when tested with universal indicator showed pH as 4, 1, 11, 7 and 9, respectively. Which solution is (a) neutral? Arrange the pH in increasing order of hydrogen-ion concentration.

Discussion

8776.	Choose the correct chemical equation for the reaction of magnesium metal with hydrochloric acid.
Answer» Choose the correct chemical equation for the reaction of magnesium metal with hydrochloric acid.

Discussion

8777.	One mole of H2O corresponds to
Answer» One mole of $H_{2} O$ corresponds to

Discussion

8778.	Which of the following reagent is used in the experiment to verify the law of conservation of mass along with sodium chloride?
Answer» Which of the following reagent is used in the experiment to verify the law of conservation of mass along with sodium chloride?

Discussion

8779.	How much water should be mixed with 12 ml of alcohol so as to obtain 12% alcohol solution?
Answer» How much water should be mixed with 12 ml of alcohol so as to obtain $12 %$ alcohol solution?

Discussion

8780.	Name A, B, C, D, E and F in the following diagram showing the change of states. [5 MARKS]
Answer» Name A, B, C, D, E and F in the following diagram showing the change of states. [5 MARKS]

Discussion

8781.	What is the molecular mass of potassium ferrocyanide . Please explain....
Answer» What is the molecular mass of potassium ferrocyanide . Please explain....

Discussion

8782.	In laboratory preparation of Hydrogen, H2S is removed from the obtained gas by passing it through:
Answer» In laboratory preparation of Hydrogen, $H_{2} S$ is removed from the obtained gas by passing it through:

Discussion

8783.	Why do saucers have groove in centre? Explain in detail.
Answer» Why do saucers have groove in centre? Explain in detail.

Discussion

8784.	Why only dilute acids are used to prepare hydrogen?
Answer» Why only dilute acids are used to prepare hydrogen?

Discussion

8785.	Identify the hydrocarbon that is an example of a soap molecule.
Answer» Identify the hydrocarbon that is an example of a soap molecule.

Discussion

8786.	The ionic radii of alkali metal ions in water (hydrated radii) are in the order
Answer» The ionic radii of alkali metal ions in water (hydrated radii) are in the order

Discussion

8787.	Why does not dry HCl gas change the colour of the dry litmus paper?
Answer» Why does not dry $H C l$ gas change the colour of the dry litmus paper?

Discussion

8788.	If 1g of sulphur contains x atoms , calculate the number of atoms in one gram of oxygen element.
Answer» If 1g of sulphur contains x atoms , calculate the number of atoms in one gram of oxygen element.

Discussion

8789.	Suzan found some water droplets on the plate she used to cover the vessel containing hot water. These water droplets came on the inner surface of the plate due to:
Answer» Suzan found some water droplets on the plate she used to cover the vessel containing hot water. These water droplets came on the inner surface of the plate due to:

Discussion

8790.	Why has the Taj Mahal started giving yellow tint?
Answer» Why has the Taj Mahal started giving yellow tint?

Discussion

8791.	a force acts on a particle of mass 200 g. the velocity of the particle changes from 15 m/s to 25 m/s in 2.5 s. assuming the force to be constant find the magnitude
Answer» a force acts on a particle of mass 200 g. the velocity of the particle changes from 15 m/s to 25 m/s in 2.5 s. assuming the force to be constant find the magnitude

Discussion

8792.	During an analysis of 255 mg of a molecule that contains only C, H and O, 561 mg CO2 is produced along with 306 mg H2O on combustion. If the molar mass of the compound is 180 g/mol, what is the molecular formula of the compound ?
Answer» During an analysis of $255 mg$ of a molecule that contains only $C, H$ and $O$ , $561 mg C O_{2}$ is produced along with $306 mg H_{2} O$ on combustion. If the molar mass of the compound is $180 g/mol$ , what is the molecular formula of the compound ?

Discussion

8793.	An element X is in the 1st group of the modern periodic table. Its ion will be represented as:
Answer» An element X is in the $1^{s t}$ group of the modern periodic table. Its ion will be represented as:

Discussion

8794.	Which method can be used to separate a mixture of naphthalene and common salt ?
Answer» Which method can be used to separate a mixture of naphthalene and common salt ?

Discussion

8795.	Question 30. Identify the correct representation of reaction occurring during chloralkali process. (a) 2NaCl(l)+2H2O(l)→2NaOH(l)+Cl2(g)+H2(g) (b) 2NaCl(aq)+2H2O(aq)→2NaOH(aq)+Cl2(g)+H2(g) (c) 2NaCl(aq)+2H2O(l)→2NaOH(aq)+Cl2(aq)+H2(aq) (d) 2NaCl(aq)+2H2O(l)→2NaOH(aq)+Cl2(g)+H2(g)
Answer» Question 30. Identify the correct representation of reaction occurring during chloralkali process. (a) $2 NaCl(l) + 2 H_{2} O(l) \to 2 NaOH(l) + {Cl}_{2} (g) + H_{2} (g)$ (b) $2 NaCl(aq) + 2 H_{2} O(aq) \to 2 NaOH(aq) + {Cl}_{2} (g) + H_{2} (g)$ (c) $2 NaCl(aq) + 2 H_{2} O(l) \to 2 NaOH(aq) + {Cl}_{2} (aq) + H_{2} (aq)$ (d) $2 NaCl(aq) + 2 H_{2} O(l) \to 2 NaOH(aq) + {Cl}_{2} (g) + H_{2} (g)$

Discussion

8796.	Atomic number=?? Mass number=24 No of neutrons=? Number of protons=??? Number of electrons=12 Name of the element is Magnesium. Please explain the procedure to find out the blanks left out
Answer» Atomic number=?? Mass number=24 No of neutrons=? Number of protons=??? Number of electrons=12 Name of the element is Magnesium. Please explain the procedure to find out the blanks left out

8796.

Atomic number=?? Mass number=24 No of neutrons=? Number of protons=??? Number of electrons=12 Name of the element is Magnesium. Please explain the procedure to find out the blanks left out

Answer»

Atomic number=??

Mass number=24

No of neutrons=?

Number of protons=???

Number of electrons=12

Name of the element is Magnesium.

Please explain the procedure to find out the blanks left out

Discussion

8797.	Question 19.1 Write the balanced chemical equation for the following reaction and identify the type of reaction. Nitrogen gas is treated with hydrogen gas in the presence of a catalyst at 773K to form ammonia gas.
Answer» Question 19.1 Write the balanced chemical equation for the following reaction and identify the type of reaction. Nitrogen gas is treated with hydrogen gas in the presence of a catalyst at 773K to form ammonia gas.

Discussion

8798.	35Cl17 and 37Cl17 do not differ in their chemical reactions Give reason
Answer» 35Cl17 and 37Cl17 do not differ in their chemical reactions Give reason

8798.

35Cl17 and 37Cl17 do not differ in their chemical reactions Give reason

Answer»

35Cl17 and 37Cl17 do not differ in their chemical reactions

Give reason

Discussion

8799.	Solution of sodium metal in liquid ammonia is strongly reducing due to the presence of the following in solution
Answer» Solution of sodium metal in liquid ammonia is strongly reducing due to the presence of the following in solution

Discussion

8800.	Arrange the following in the decreaing order of their particle size: suspension, true solution and colloids
Answer» Arrange the following in the decreaing order of their particle size: suspension, true solution and colloids

Discussion

Explore topic-wise InterviewSolutions in .

Which of the following is not regraded as a pollutant?

does copper sulphate and blue vitriol are same ?

How does pressure affect the boiling any melting/freezing point of a substance ?

1) zinc carbonate= zinc oxide+ carbon dioxide 2) potassium bromide+ barium iodide = potassium iodide + barium bromide Balance the equations

Why are gases so easily compressible whereas it is almost impossible to compress a solid or a liquid?

A student, while testing the solubility of potassium nitrate at 313k, found that the solubility is 62 in 100g of water. What masses of potassium nitrate would be needed to produce a saturated solution of potassium nitrate in 50g of water at 1313k?

What is the formula for copper (II) oxide?

Which one of the following statements is incorrect?

Magnesium is two times heavier than C-12 atom, what shall be the mass of Mg atom in terms of atomic mass unit?

Choose the part that has an error Instead of crying/over spilled milk/, you had better try to/ sort out your differences first./No error.

Define the term isotope with a suitable example.

How many atoms of oxygen are there in 4.4g of CO​​​​​2

What is the electronic configuration of a hydrogen atom?

48.67 % (w/W) HCl stock solution has a density of 1.5gmL−1. The molecular weight of HCl is 36.5gmol−1.The volume (mL) of stock required to prepare 200 mL of 0.4 M HCl is: ___

What happens to the rate of reaction if the pressure of the reacting system increases?

To make a saturated solution,36 g of sodium chloride is dissolved in 100 g of water at 293K. Find its concentration at the temperature.

Student paper 2 solutions, a solution of alum and a solution of fine sand in water . Distinguish between the two on the basis of transparency and stability.

Why atomic masses are only calculated in relative atomic masses reason out

Which one of the following metals can displace copper from copper sulphate solution?

If we consider 16, in place of 112, the mass of carbon atom to be the relative atomic mass unit, the mass of one mole of substance will: (A) be a function of the molecular mass of the substance (B) remain unchanged (C) increase two fold (D) decrease twice

Why nitric acid is not used is not used for the preparation of hydrogen gas?

State one major drawback of Rutherford's model.

CrO3 dissoloves in aqueous NaOH to give :

Question 1 (g) Which separation techniques will you apply for the separation of the following? g. Tea leaves from tea.

Question 9(a) Five solutions A, B, C, D and E when tested with universal indicator showed pH as 4, 1, 11, 7 and 9, respectively. Which solution is (a) neutral? Arrange the pH in increasing order of hydrogen-ion concentration.

Choose the correct chemical equation for the reaction of magnesium metal with hydrochloric acid.

One mole of H2O corresponds to

Which of the following reagent is used in the experiment to verify the law of conservation of mass along with sodium chloride?

How much water should be mixed with 12 ml of alcohol so as to obtain 12% alcohol solution?

Name A, B, C, D, E and F in the following diagram showing the change of states. [5 MARKS]

What is the molecular mass of potassium ferrocyanide . Please explain....

In laboratory preparation of Hydrogen, H2S is removed from the obtained gas by passing it through:

Why do saucers have groove in centre? Explain in detail.

Why only dilute acids are used to prepare hydrogen?

Identify the hydrocarbon that is an example of a soap molecule.

The ionic radii of alkali metal ions in water (hydrated radii) are in the order

Why does not dry HCl gas change the colour of the dry litmus paper?

If 1g of sulphur contains x atoms , calculate the number of atoms in one gram of oxygen element.

Suzan found some water droplets on the plate she used to cover the vessel containing hot water. These water droplets came on the inner surface of the plate due to:

Why has the Taj Mahal started giving yellow tint?

a force acts on a particle of mass 200 g. the velocity of the particle changes from 15 m/s to 25 m/s in 2.5 s. assuming the force to be constant find the magnitude

During an analysis of 255 mg of a molecule that contains only C, H and O, 561 mg CO2 is produced along with 306 mg H2O on combustion. If the molar mass of the compound is 180 g/mol, what is the molecular formula of the compound ?

An element X is in the 1st group of the modern periodic table. Its ion will be represented as:

Which method can be used to separate a mixture of naphthalene and common salt ?

Question 30. Identify the correct representation of reaction occurring during chloralkali process. (a) 2NaCl(l)+2H2O(l)→2NaOH(l)+Cl2(g)+H2(g) (b) 2NaCl(aq)+2H2O(aq)→2NaOH(aq)+Cl2(g)+H2(g) (c) 2NaCl(aq)+2H2O(l)→2NaOH(aq)+Cl2(aq)+H2(aq) (d) 2NaCl(aq)+2H2O(l)→2NaOH(aq)+Cl2(g)+H2(g)

Atomic number=?? Mass number=24 No of neutrons=? Number of protons=??? Number of electrons=12 Name of the element is Magnesium. Please explain the procedure to find out the blanks left out

Question 19.1 Write the balanced chemical equation for the following reaction and identify the type of reaction. Nitrogen gas is treated with hydrogen gas in the presence of a catalyst at 773K to form ammonia gas.

35Cl17 and 37Cl17 do not differ in their chemical reactions Give reason

Solution of sodium metal in liquid ammonia is strongly reducing due to the presence of the following in solution

Arrange the following in the decreaing order of their particle size: suspension, true solution and colloids

How many atoms of oxygen are there in 4.4g of CO2