10223 + Interview Questions in Chemistry Page 167 InterviewSolution

8301.	Condensation occurs at a fixed temperature whereas melting occurs over a range of temperature. (True/False). Justify your answer. Thus question is from the chemistry workbook and i have some difficulties in answering it.can u pls help ??
Answer» Condensation occurs at a fixed temperature whereas melting occurs over a range of temperature. (True/False). Justify your answer. Thus question is from the chemistry workbook and i have some difficulties in answering it.can u pls help ??

8301.

Condensation occurs at a fixed temperature whereas melting occurs over a range of temperature. (True/False). Justify your answer. Thus question is from the chemistry workbook and i have some difficulties in answering it.can u pls help ??

Answer»

Condensation occurs at a fixed temperature whereas melting occurs over a range of
temperature. (True/False). Justify your answer.

Thus question is from the chemistry workbook and i have some difficulties in answering it.can u pls help ??

Discussion

8302.	How is cream separated from milk?
Answer» How is cream separated from milk?

Discussion

8303.	Methyl bromide:Fumigant::2,4D:________________
Answer» Methyl bromide:Fumigant::2,4D:________________

Discussion

8304.	why did the mass and charge of anode rays depend on the gas taken whereas the cathode rays properties were independent of the gas taken
Answer» why did the mass and charge of anode rays depend on the gas taken whereas the cathode rays properties were independent of the gas taken

Discussion

8305.	How atoms of the screen of my smartphone are able to emit lights of different colours??
Answer» How atoms of the screen of my smartphone are able to emit lights of different colours??

Discussion

8306.	Where ink is not heated directly in activity to separate dye from ink?
Answer» Where ink is not heated directly in activity to separate dye from ink?

Discussion

8307.	Explain why, the diffusion of a solid in another solid is a very slow process.
Answer» Explain why, the diffusion of a solid in another solid is a very slow process.

Discussion

8308.	What happens during the process of smelting of iron?
Answer» What happens during the process of smelting of iron?

Discussion

8309.	Who discovered noble gas?
Answer» Who discovered noble gas?

Discussion

8310.	Latent heat of fusion for ice is :-
Answer» Latent heat of fusion for ice is :-

Discussion

8311.	Why do we separate ethyl alcohol and water by fractional distillation?
Answer» Why do we separate ethyl alcohol and water by fractional distillation?

Discussion

8312.	What are the steps we can do for drying wet clothes
Answer» What are the steps we can do for drying wet clothes

Discussion

8313.	How is scrap iron separated from a heap of waste materials in factories?
Answer» How is scrap iron separated from a heap of waste materials in factories?

Discussion

8314.	Structures of nuclei of three atoms A, B, and C are given below: A has 90 protons and 146 neutrons. B has 92 protons and 146 neutrons. C has 90 protons and 148 neutrons. Based on the above data, which of these atoms are isotopes and which are isobars?
Answer» Structures of nuclei of three atoms A, B, and C are given below: A has 90 protons and 146 neutrons. B has 92 protons and 146 neutrons. C has 90 protons and 148 neutrons. Based on the above data, which of these atoms are isotopes and which are isobars?

Discussion

8315.	The number of moles of KMnO4 reduced by one mole of KI in alkaline medium is
Answer» The number of moles of $K M n O_{4}$ reduced by one mole of $K I$ in alkaline medium is

Discussion

8316.	In C+H2O⟶CO+H2, H2O acts as a:
Answer» In $C + H_{2} O ⟶ C O + H_{2}, H_{2} O$ acts as a:

Discussion

8317.	Calculate the mass of sodium sulphate required to prepare its 20% (mass %) solution in hundred grams of water
Answer» Calculate the mass of sodium sulphate required to prepare its 20% (mass %) solution in hundred grams of water

Discussion

8318.	What is the common name of solid carbon dioxide ?
Answer» What is the common name of solid carbon dioxide ?

Discussion

8319.	1.Define latent heat of fusion 2.Define latent heat of vapourisation
Answer» 1.Define latent heat of fusion 2.Define latent heat of vapourisation

8319.

1.Define latent heat of fusion 2.Define latent heat of vapourisation

Answer»

1.Define latent heat of fusion

2.Define latent heat of vapourisation

Discussion

8320.	Which one of the following statement is correct in respect of fluids? (a) only gases behave as fluids (b) gases and solids behave as fluids (c) gases and liquids behave as fluids (d) only liquids are fluids
Answer» Which one of the following statement is correct in respect of fluids? (a) only gases behave as fluids (b) gases and solids behave as fluids (c) gases and liquids behave as fluids (d) only liquids are fluids

8320.

Which one of the following statement is correct in respect of fluids? (a) only gases behave as fluids (b) gases and solids behave as fluids (c) gases and liquids behave as fluids (d) only liquids are fluids

Answer»

Which one of the following statement is correct in respect of fluids?

(a) only gases behave as fluids (b) gases and solids behave as fluids

(c) gases and liquids behave as fluids (d) only liquids are fluids

Discussion

8321.	In presence of platinum at 800 degree Celsius, ammonia reacts with oxygen to give.
Answer» In presence of platinum at 800 degree Celsius, ammonia reacts with oxygen to give.

Discussion

8322.	How to separate two miscible liquids
Answer» How to separate two miscible liquids

Discussion

8323.	In an experiment, 1.50 g of pure copper (ll) oxide was reduced to pure metal by heating with pure carbon. In another experiment, 1.15 g of pure copper was treated with nitric acid and the product formed was heated strongly till no further change was observed. The mass of copper (ll) oxide so formed was found to be 1.40 g. The mass of pure metal in the first experiment and the law followed are respectively
Answer» In an experiment, 1.50 g of pure copper (ll) oxide was reduced to pure metal by heating with pure carbon. In another experiment, 1.15 g of pure copper was treated with nitric acid and the product formed was heated strongly till no further change was observed. The mass of copper (ll) oxide so formed was found to be 1.40 g. The mass of pure metal in the first experiment and the law followed are respectively

Discussion

8324.	Evaluate: 105 x 95
Answer» Evaluate: 105 x 95

Discussion

8325.	Question 3 The number of electrons in an element X is 15 and the number of neutrons is 16. Which of the following is the correct representation of the element? (a) 3115X (b) 3116X (c) 1615X (d) 1516X
Answer» Question 3 The number of electrons in an element X is 15 and the number of neutrons is 16. Which of the following is the correct representation of the element? (a) $_{15}^{31} X$ (b) $_{16}^{31} X$ (c) $_{15}^{16} X$ (d) $_{16}^{15} X$

Discussion

8326.	Which technique is best suited for the separation of components that dissolves in the same solvent?
Answer» Which technique is best suited for the separation of components that dissolves in the same solvent?

Discussion

8327.	One atomic mass unit is a mass unit equal to exactly one twelfth (1/12th) the mass of one atom of ___________.
Answer» One atomic mass unit is a mass unit equal to exactly one twelfth (1/12^th) the mass of one atom of ___________.

Discussion

8328.	Which of the following is true for ionic compounds?
Answer» Which of the following is true for ionic compounds?

Discussion

8329.	Which of the following techniques can be used to separate a soluble solid and a liquid? a. Evaporation b. Filtration c. Distillation
Answer» Which of the following techniques can be used to separate a soluble solid and a liquid? a. Evaporation b. Filtration c. Distillation

8329.

Which of the following techniques can be used to separate a soluble solid and a liquid? a. Evaporation b. Filtration c. Distillation

Answer»

Which of the following techniques can be used to separate a soluble solid and a liquid?

a. Evaporation

b. Filtration

c. Distillation

Discussion

8330.	How we can show that matter is continuous motion
Answer» How we can show that matter is continuous motion

Discussion

8331.	A gas of volume 2000ml is kept in a vessel at a pressure of 103 pascals at a temperature of 27∘ C. If the pressure is increased to 105 pascals at the same temperature, the volume of the gas becomes
Answer» A gas of volume 2000ml is kept in a vessel at a pressure of $10^{3}$ pascals at a temperature of $27^{\circ} C$ . If the pressure is increased to $10^{5}$ pascals at the same temperature, the volume of the gas becomes

Discussion

8332.	What kind of matter are humans made up of?
Answer» What kind of matter are humans made up of?

Discussion

8333.	Which of the following is not a natural polymer?
Answer» Which of the following is not a natural polymer?

Discussion

8334.	Calculate the mass of 1 molecule of O2(oxygen)
Answer» Calculate the mass of 1 molecule of O2(oxygen)

Discussion

8335.	Question 1 (b) Which separation techniques will you apply for the separation of the following? b. Ammonium chloride from a mixture containing sodium chloride and ammonium chloride.
Answer» Question 1 (b) Which separation techniques will you apply for the separation of the following? b. Ammonium chloride from a mixture containing sodium chloride and ammonium chloride.

Discussion

8336.	A when added to silica gives B. A and B are:
Answer» A when added to silica gives B. A and B are:

Discussion

8337.	How can solids and liquids diffuse when there is intermolecular force between them ?
Answer» How can solids and liquids diffuse when there is intermolecular force between them ?

Discussion

8338.	Water is said to be soft when
Answer» Water is said to be soft when

Discussion

8339.	The total number of orientations possible for a sub-shell with l = 3 is
Answer» The total number of orientations possible for a sub-shell with l = 3 is

Discussion

8340.	Shorthe note on solutions
Answer» Shorthe note on solutions

Discussion

8341.	What are the significance of the terms - ' isolated gas atoms' and 'ground state ' while defining the ionization enthalpy and electron gain enthalpy.
Answer» What are the significance of the terms - ' isolated gas atoms' and 'ground state ' while defining the ionization enthalpy and electron gain enthalpy.

Discussion

8342.	(a) Which property of water enables it to modify the climate? (b) The density of water varies with temperature. What are its consequences? (c) State the melting point, boiling point, specific heat capacity, specific latent heat of fusion and specific latent heat of vaporization of water.
Answer» (a) Which property of water enables it to modify the climate? (b) The density of water varies with temperature. What are its consequences? (c) State the melting point, boiling point, specific heat capacity, specific latent heat of fusion and specific latent heat of vaporization of water.

8342.

(a) Which property of water enables it to modify the climate? (b) The density of water varies with temperature. What are its consequences? (c) State the melting point, boiling point, specific heat capacity, specific latent heat of fusion and specific latent heat of vaporization of water.

Answer»

(a) Which property of water enables it to modify the climate?

(b) The density of water varies with temperature. What are its consequences?

(c) State the melting point, boiling point, specific heat capacity, specific latent heat of fusion and specific latent heat of vaporization of water.

Discussion

8343.	Which one of the following does not increase while moving down the group in the periodic table?
Answer» Which one of the following does not increase while moving down the group in the periodic table?

Discussion

8344.	How will you separate a mixture of iron filings, chalk powder and common salt?
Answer» How will you separate a mixture of iron filings, chalk powder and common salt?

Discussion

8345.	What are the Latin Names of Sodium, Lead and Gold respectively?
Answer» What are the Latin Names of Sodium, Lead and Gold respectively?

Discussion

8346.	What are the demerits of using hydrogen as a fuel cell?
Answer» What are the demerits of using hydrogen as a fuel cell?

Discussion

8347.	Find the mass of oxygen contained in 1 kg of Potassium nitrate (KNO3)
Answer» Find the mass of oxygen contained in 1 kg of Potassium nitrate (KNO₃)

Discussion

8348.	On what theory/theories was Dalton’s atomic theory based?
Answer» On what theory/theories was Dalton’s atomic theory based?

Discussion

8349.	Unable to understand: Is matter continuous or particulate?
Answer» Unable to understand: Is matter continuous or particulate?

Discussion

8350.	A gas X at -33°C is heated to 127°C at constant pressure. Calculate the percentage increase in the volume of the gas
Answer» A gas X at -33°C is heated to 127°C at constant pressure. Calculate the percentage increase in the volume of the gas

Discussion

Explore topic-wise InterviewSolutions in .

Condensation occurs at a fixed temperature whereas melting occurs over a range of temperature. (True/False). Justify your answer. Thus question is from the chemistry workbook and i have some difficulties in answering it.can u pls help ??

How is cream separated from milk?

Methyl bromide:Fumigant::2,4D:________________

why did the mass and charge of anode rays depend on the gas taken whereas the cathode rays properties were independent of the gas taken

How atoms of the screen of my smartphone are able to emit lights of different colours??

Where ink is not heated directly in activity to separate dye from ink?

Explain why, the diffusion of a solid in another solid is a very slow process.

What happens during the process of smelting of iron?

Who discovered noble gas?

Latent heat of fusion for ice is :-

Why do we separate ethyl alcohol and water by fractional distillation?

What are the steps we can do for drying wet clothes

How is scrap iron separated from a heap of waste materials in factories?

Structures of nuclei of three atoms A, B, and C are given below: A has 90 protons and 146 neutrons. B has 92 protons and 146 neutrons. C has 90 protons and 148 neutrons. Based on the above data, which of these atoms are isotopes and which are isobars?

The number of moles of KMnO4 reduced by one mole of KI in alkaline medium is

In C+H2O⟶CO+H2, H2O acts as a:

Calculate the mass of sodium sulphate required to prepare its 20% (mass %) solution in hundred grams of water

What is the common name of solid carbon dioxide ?

1.Define latent heat of fusion 2.Define latent heat of vapourisation

Which one of the following statement is correct in respect of fluids? (a) only gases behave as fluids (b) gases and solids behave as fluids (c) gases and liquids behave as fluids (d) only liquids are fluids

In presence of platinum at 800 degree Celsius, ammonia reacts with oxygen to give.

How to separate two miscible liquids

Evaluate: 105 x 95

Question 3 The number of electrons in an element X is 15 and the number of neutrons is 16. Which of the following is the correct representation of the element? (a) 3115X (b) 3116X (c) 1615X (d) 1516X

Which technique is best suited for the separation of components that dissolves in the same solvent?

One atomic mass unit is a mass unit equal to exactly one twelfth (1/12th) the mass of one atom of ___________.

Which of the following is true for ionic compounds?

Which of the following techniques can be used to separate a soluble solid and a liquid? a. Evaporation b. Filtration c. Distillation

How we can show that matter is continuous motion

A gas of volume 2000ml is kept in a vessel at a pressure of 103 pascals at a temperature of 27∘ C. If the pressure is increased to 105 pascals at the same temperature, the volume of the gas becomes

What kind of matter are humans made up of?

Which of the following is not a natural polymer?

Calculate the mass of 1 molecule of O2(oxygen)

Question 1 (b) Which separation techniques will you apply for the separation of the following? b. Ammonium chloride from a mixture containing sodium chloride and ammonium chloride.

A when added to silica gives B. A and B are:

How can solids and liquids diffuse when there is intermolecular force between them ?

Water is said to be soft when

The total number of orientations possible for a sub-shell with l = 3 is

Shorthe note on solutions

What are the significance of the terms - ' isolated gas atoms' and 'ground state ' while defining the ionization enthalpy and electron gain enthalpy.

(a) Which property of water enables it to modify the climate? (b) The density of water varies with temperature. What are its consequences? (c) State the melting point, boiling point, specific heat capacity, specific latent heat of fusion and specific latent heat of vaporization of water.

Which one of the following does not increase while moving down the group in the periodic table?

How will you separate a mixture of iron filings, chalk powder and common salt?

What are the Latin Names of Sodium, Lead and Gold respectively?

What are the demerits of using hydrogen as a fuel cell?

Find the mass of oxygen contained in 1 kg of Potassium nitrate (KNO3)

On what theory/theories was Dalton’s atomic theory based?

Unable to understand: Is matter continuous or particulate?

A gas X at -33°C is heated to 127°C at constant pressure. Calculate the percentage increase in the volume of the gas