10223 + Interview Questions in Chemistry Page 90 InterviewSolution

4451.	4. A mixture of CH4 & HBr, in a vessel are allowed to effuse out through a small hole at the same temperature. What is the mole fraction of CH4 in the vessel if the initial rates of effusion are the same for both gases (Br = 80):- (1) 0.31 (2) 0.44 (3) 0.5 (4) 0.16
Answer» 4. A mixture of CH4 & HBr, in a vessel are allowed to effuse out through a small hole at the same temperature. What is the mole fraction of CH4 in the vessel if the initial rates of effusion are the same for both gases (Br = 80):- (1) 0.31 (2) 0.44 (3) 0.5 (4) 0.16

Discussion

4452.	30. At 30^° C, the solubility of Ag COs (Ks8 101would be maximum in 1 litre of(1) 0.05 M Na2CO(2) 0.05 M AgNO3(3) Pure water(4) 0.05 M NH3
Answer» 30. At 30^° C, the solubility of Ag COs (Ks8 101would be maximum in 1 litre of(1) 0.05 M Na2CO(2) 0.05 M AgNO3(3) Pure water(4) 0.05 M NH3

Discussion

4453.	1.Calculate the number of electrons and neutrons present in 27Al13.
Answer» 1.Calculate the number of electrons and neutrons present in ²⁷Al_13.

Discussion

4454.	How does the water kept in an earthen pot (matka ) become cold during summer ?
Answer» How does the water kept in an earthen pot (matka ) become cold during summer ?

Discussion

4455.	What is the definition of combustion and is combustion possible without oxygen i.e. with other oxidants like chlorine gas?
Answer» What is the definition of combustion and is combustion possible without oxygen i.e. with other oxidants like chlorine gas?

Discussion

4456.	38. In which of the following compounds nitrogen exhibits highest oxidation state? 1) N3H 2) NH2OH 3) N2H4 4) NH3
Answer» 38. In which of the following compounds nitrogen exhibits highest oxidation state? 1) N3H 2) NH2OH 3) N2H4 4) NH3

Discussion

4457.	In the commercial electrochemical process for Aluminium extraction, the electrolyte used is:
Answer» In the commercial electrochemical process for Aluminium extraction, the electrolyte used is:

Discussion

4458.	Iron (III) chloride is acidic while sodium carbonate is basic. Explain.
Answer» Iron (III) chloride is acidic while sodium carbonate is basic. Explain.

Discussion

4459.	28.) An ice cube of mass 0.1 kg at 0^° C is placed in an isolated container which is at 227^° C. The specifi cheat s of the container varies with temperatureT according to the empirical relation s = A + BT,where A 100 cal kg k^{-1} and B = 2 x 102 cal kg^{-1}. If the final temperature of the container is 27^° C, the mass of the container is(Latent heat of fusion of water=8x10^4 ,specific heat of water 10 cal kg^{-1} k^{-1})(a) 0.495 kg(c) 0.695 kg(b) 0.595 kg(d) 0.795 kg
Answer» 28.) An ice cube of mass 0.1 kg at 0^° C is placed in an isolated container which is at 227^° C. The specifi cheat s of the container varies with temperatureT according to the empirical relation s = A + BT,where A 100 cal kg k^{-1} and B = 2 x 102 cal kg^{-1}. If the final temperature of the container is 27^° C, the mass of the container is(Latent heat of fusion of water=8x10^4 ,specific heat of water 10 cal kg^{-1} k^{-1})(a) 0.495 kg(c) 0.695 kg(b) 0.595 kg(d) 0.795 kg

Discussion

4460.	For a closed (non rigid ) container containing n = 10 moles of an ideal gas fitted with movable , frictionless , weightless piston operating such that pressure of gas remains constant at 0.821 atm . Draw graph representing correct variation of log V Versus log T where V is in litre and T is in Kelvin .
Answer» For a closed (non rigid ) container containing n = 10 moles of an ideal gas fitted with movable , frictionless , weightless piston operating such that pressure of gas remains constant at 0.821 atm . Draw graph representing correct variation of log V Versus log T where V is in litre and T is in Kelvin .

Discussion

4461.	How can we combine 2 atoms of hydrogen and 1 atom of oxygen physically?
Answer» How can we combine 2 atoms of hydrogen and 1 atom of oxygen physically?

Discussion

4462.	Which of the following elements can combine with all non-metals with the help of covalent bonds?
Answer» Which of the following elements can combine with all non-metals with the help of covalent bonds?

Discussion

4463.	Balance the equation-Barium chloride + aluminum sulphate = barium sulphate + aluminum chloride
Answer» Balance the equation- Barium chloride + aluminum sulphate = barium sulphate + aluminum chloride

Discussion

4464.	The ratio of the radii of hydrogen atom and its nucleus is ~105. Assuming the atom and the nucleus to be spherical,(i) What will be the ratio of their sizes?(ii) If the atom is represented by planet earth, ′R′e=6.4×106 m. estimate the size of the nucleus.
Answer» The ratio of the radii of hydrogen atom and its nucleus is $~ 10^{5}$ . Assuming the atom and the nucleus to be spherical, (i) What will be the ratio of their sizes? (ii) If the atom is represented by planet earth, $^{'} R_{e}^{'} = 6.4 \times 10^{6} m .$ estimate the size of the nucleus.

Discussion

4465.	The number of neutrons present in the element AZX is given by ________.
Answer» The number of neutrons present in the element $_{Z}^{A} X$ is given by ________.

Discussion

4466.	Define saturated and unsaturated solutions.
Answer» Define saturated and unsaturated solutions.

Discussion

4467.	The correct schematic atomic structure of sulphur is
Answer» The correct schematic atomic structure of sulphur is

Discussion

4468.	Why smell is not matter explain
Answer» Why smell is not matter explain

Discussion

4469.	Question 1 Ethane with the molecular formula C2H6 has: (a) 6 covalent bonds (b) 7 covalent bonds (c) 8 covalent bonds (d) 9 covalent bonds
Answer» Question 1 Ethane with the molecular formula $C_{2} H_{6}$ has: (a) 6 covalent bonds (b) 7 covalent bonds (c) 8 covalent bonds (d) 9 covalent bonds

Discussion

4470.	Number of Faraday's required to generate one Gram atom of calcium from molten CaCl2
Answer» Number of Faraday's required to generate one Gram atom of calcium from molten CaCl2

Discussion

4471.	A student, by mistake, mixed sulphur powder with iron filings. The following techniques were suggested to separate the sulphur from the mixture out of which he has to choose one :A. dissolving in carbon disulphide, filtration, evaporationB. dissolving in water at room temperature and filtrationC. dissolving in hot water, filtration and evaporationD. dissolving in ice cold water and filtrationThe correct technique is :(1) A(2) B(3) C(4) D
Answer» A student, by mistake, mixed sulphur powder with iron filings. The following techniques were suggested to separate the sulphur from the mixture out of which he has to choose one : A. dissolving in carbon disulphide, filtration, evaporation B. dissolving in water at room temperature and filtration C. dissolving in hot water, filtration and evaporation D. dissolving in ice cold water and filtration The correct technique is : (1) A (2) B (3) C (4) D

Discussion

4472.	The teacher took 2 beakers and said, "I am adding Cl-35 in the first beaker and adding Cl-37 in the second beaker. What do you think will be the valency of the two types of the chlorine atoms?"
Answer» The teacher took 2 beakers and said, "I am adding Cl-35 in the first beaker and adding Cl-37 in the second beaker. What do you think will be the valency of the two types of the chlorine atoms?"

Discussion

4473.	(a) What is a physical change ? Give two examples of physical changes. (b) What is chemical change ? Give two examples of chemical changes.
Answer» (a) What is a physical change ? Give two examples of physical changes. (b) What is chemical change ? Give two examples of chemical changes.

4473.

(a) What is a physical change ? Give two examples of physical changes. (b) What is chemical change ? Give two examples of chemical changes.

Answer»

(a) What is a physical change ? Give two examples of physical changes.

(b) What is chemical change ? Give two examples of chemical changes.

Discussion

4474.	why sodium is a cation?
Answer» why sodium is a cation?

Discussion

4475.	A metal oxide MO contain 40% oxygen. The equivalent weight of metal is(1) 12(2) 24(3) 36(4) 48
Answer» A metal oxide MO contain 40% oxygen. The equivalent weight of metal is (1) 12 (2) 24 (3) 36 (4) 48

Discussion

4476.	Classify carbonate ion on the basis of its valency.
Answer» Classify carbonate ion on the basis of its valency.

Discussion

4477.	the standard reduction potential at 25c of LI^+/Li Ba^+2/Ba Na^=/Na and Mg^2+/Mg are -a,(-a+0.15),(-a+0.34)and(-a+0.68)volt respectively the strongest oxidising agent among the following is
Answer» the standard reduction potential at 25c of LI^+/Li Ba^+2/Ba Na^=/Na and Mg^2+/Mg are -a,(-a+0.15),(-a+0.34)and(-a+0.68)volt respectively the strongest oxidising agent among the following is

Discussion

4478.	Which one of the following statements is not correct about isotopes?
Answer» Which one of the following statements is not correct about isotopes?

Discussion

4479.	What is the unit of Alvadro number?
Answer» What is the unit of Alvadro number?

Discussion

4480.	Anything that occupies space and has weight is called ___.
Answer» Anything that occupies space and has weight is called ___.

Discussion

4481.	The oxidation number of sulphur in sulphur dioxideSO2 and sulphuric acidH2SO4 is respectively
Answer» The oxidation number of sulphur in sulphur dioxide $S O_{2}$ and sulphuric acid $H_{2} S O_{4}$ is respectively

Discussion

4482.	what is yhe meaning of volatile liquids
Answer» what is yhe meaning of volatile liquids

Discussion

4483.	48. If the electronic configuration of nitrogen atom is 1s^7 then it violates
Answer» 48. If the electronic configuration of nitrogen atom is 1s^7 then it violates

Discussion

4484.	Which of the following types of medicine is used for the treatment of indigestion?
Answer» Which of the following types of medicine is used for the treatment of indigestion?

Discussion

4485.	The crystalline salt Na2SO4.xH2O on heating losses 55.9%of it's mass and becomeanhydrous The formula of crystalline salt is
Answer» The crystalline salt Na2SO4.xH2O on heating losses 55.9%of it's mass and become anhydrous The formula of crystalline salt is

Discussion

4486.	In Hydrogen spectrum the different lines we see are due to the coming back of electrons of different hydrogen atoms?
Answer» In Hydrogen spectrum the different lines we see are due to the coming back of electrons of different hydrogen atoms?

Discussion

4487.	When reacting with steam, which of the following metals shows the fastest rate of reaction?
Answer» When reacting with steam, which of the following metals shows the fastest rate of reaction?

Discussion

4488.	percentage of tetrahedral voids and octahedral void remain unoccupied in zns structure are 1. 50%and 50℅ 2.50%and100%3.25%and 50%4.100%and50%
Answer» percentage of tetrahedral voids and octahedral void remain unoccupied in zns structure are 1. 50%and 50℅ 2.50%and100% 3.25%and 50% 4.100%and50%

Discussion

4489.	Name the property of gases that help aquatic plants and animals to survive in the water?
Answer» Name the property of gases that help aquatic plants and animals to survive in the water?

Discussion

4490.	A student takes a mixture of sand and ammonium chloride in a china dish and heats it under a funnel fitted with a plug over a flame. He would observe that :(1) solid sand gets deposited on the lower cooler parts of the funnel while solid ammonium chloride remains in the china dish.(2) sand and ammonium chloride get deposited on hotter parts of the funnel.(3) ammonium chloride gets deposited on the cooler parts of the funnel and sand remains in the china dish.(4) sand collects on cooler parts of the funnel while ammonium chloride melts in the china dish.
Answer» A student takes a mixture of sand and ammonium chloride in a china dish and heats it under a funnel fitted with a plug over a flame. He would observe that : (1) solid sand gets deposited on the lower cooler parts of the funnel while solid ammonium chloride remains in the china dish. (2) sand and ammonium chloride get deposited on hotter parts of the funnel. (3) ammonium chloride gets deposited on the cooler parts of the funnel and sand remains in the china dish. (4) sand collects on cooler parts of the funnel while ammonium chloride melts in the china dish.

Discussion

4491.	Which of the following chemical formula is correct?
Answer» Which of the following chemical formula is correct?

Discussion

4492.	Statements: No note is a coin. Some coins are metals. All plastics are notes. Conclusions: I. No coin is plastic. II. All plastics being metals is a possibility.
Answer» Statements: No note is a coin. Some coins are metals. All plastics are notes. Conclusions: I. No coin is plastic. II. All plastics being metals is a possibility.

4492.

Statements: No note is a coin. Some coins are metals. All plastics are notes. Conclusions: I. No coin is plastic. II. All plastics being metals is a possibility.

Answer»

Statements:

No note is a coin.

Some coins are metals.

All plastics are notes.

Conclusions:

I. No coin is plastic.

II. All plastics being metals is a possibility.

Discussion

4493.	0.231g of an organic substance gave 40 ml of moist nitrogen measured at 15^° C and745 mm pressure. Calculate the % of nitrogen (aq, tension at 15^° C is 12.7 mm)
Answer» 0.231g of an organic substance gave 40 ml of moist nitrogen measured at 15^° C and745 mm pressure. Calculate the % of nitrogen (aq, tension at 15^° C is 12.7 mm)

Discussion

4494.	समवयस्क हिंदी प्रेमियों की मंडली में कौन-कौन से लेखक मुख्य थे?
Answer» समवयस्क हिंदी प्रेमियों की मंडली में कौन-कौन से लेखक मुख्य थे?

Discussion

4495.	21. An ion is reduced to the element when it absorbs 6× 10 raise to power 20 electrons.The number of equivalent of the ion is .
Answer» 21. An ion is reduced to the element when it absorbs 6× 10 raise to power 20 electrons.The number of equivalent of the ion is .

Discussion

4496.	Identify X in the following reaction: HCl + X → NaCl + H2CO3 H2CO3 → H2O + CO2
Answer» Identify X in the following reaction: $H C l$ + X $\to$ $N a C l$ + $H_{2} C O_{3}$ $H_{2} C O_{3}$ $\to$ $H_{2} O$ + $C O_{2}$

Discussion

4497.	Is oil a solution or a compound?
Answer» Is oil a solution or a compound?

Discussion

4498.	What are polar covalent bonds? Please explain with an example.
Answer» What are polar covalent bonds? Please explain with an example.

Discussion

4499.	How will you show the presence of water vapour in the atmosphere?
Answer» How will you show the presence of water vapour in the atmosphere?

Discussion

4500.	What is the state of ice cream?
Answer» What is the state of ice cream?

Discussion

Explore topic-wise InterviewSolutions in .

4. A mixture of CH4 & HBr, in a vessel are allowed to effuse out through a small hole at the same temperature. What is the mole fraction of CH4 in the vessel if the initial rates of effusion are the same for both gases (Br = 80):- (1) 0.31 (2) 0.44 (3) 0.5 (4) 0.16

30. At 30^° C, the solubility of Ag COs (Ks8 101would be maximum in 1 litre of(1) 0.05 M Na2CO(2) 0.05 M AgNO3(3) Pure water(4) 0.05 M NH3

1.Calculate the number of electrons and neutrons present in 27Al13.

How does the water kept in an earthen pot (matka ) become cold during summer ?

What is the definition of combustion and is combustion possible without oxygen i.e. with other oxidants like chlorine gas?

38. In which of the following compounds nitrogen exhibits highest oxidation state? 1) N3H 2) NH2OH 3) N2H4 4) NH3

In the commercial electrochemical process for Aluminium extraction, the electrolyte used is:

Iron (III) chloride is acidic while sodium carbonate is basic. Explain.

How can we combine 2 atoms of hydrogen and 1 atom of oxygen physically?

Which of the following elements can combine with all non-metals with the help of covalent bonds?

Balance the equation-Barium chloride + aluminum sulphate = barium sulphate + aluminum chloride

The ratio of the radii of hydrogen atom and its nucleus is ~105. Assuming the atom and the nucleus to be spherical,(i) What will be the ratio of their sizes?(ii) If the atom is represented by planet earth, ′R′e=6.4×106 m. estimate the size of the nucleus.

The number of neutrons present in the element AZX is given by ________.

Define saturated and unsaturated solutions.

The correct schematic atomic structure of sulphur is

Why smell is not matter explain

Question 1 Ethane with the molecular formula C2H6 has: (a) 6 covalent bonds (b) 7 covalent bonds (c) 8 covalent bonds (d) 9 covalent bonds

Number of Faraday's required to generate one Gram atom of calcium from molten CaCl2

The teacher took 2 beakers and said, "I am adding Cl-35 in the first beaker and adding Cl-37 in the second beaker. What do you think will be the valency of the two types of the chlorine atoms?"

(a) What is a physical change ? Give two examples of physical changes. (b) What is chemical change ? Give two examples of chemical changes.

why sodium is a cation?

A metal oxide MO contain 40% oxygen. The equivalent weight of metal is(1) 12(2) 24(3) 36(4) 48

Classify carbonate ion on the basis of its valency.

the standard reduction potential at 25c of LI^+/Li Ba^+2/Ba Na^=/Na and Mg^2+/Mg are -a,(-a+0.15),(-a+0.34)and(-a+0.68)volt respectively the strongest oxidising agent among the following is

Which one of the following statements is not correct about isotopes?

What is the unit of Alvadro number?

Anything that occupies space and has weight is called ___.

The oxidation number of sulphur in sulphur dioxideSO2 and sulphuric acidH2SO4 is respectively

what is yhe meaning of volatile liquids

48. If the electronic configuration of nitrogen atom is 1s^7 then it violates

Which of the following types of medicine is used for the treatment of indigestion?

The crystalline salt Na2SO4.xH2O on heating losses 55.9%of it's mass and becomeanhydrous The formula of crystalline salt is

In Hydrogen spectrum the different lines we see are due to the coming back of electrons of different hydrogen atoms?

When reacting with steam, which of the following metals shows the fastest rate of reaction?

percentage of tetrahedral voids and octahedral void remain unoccupied in zns structure are 1. 50%and 50℅ 2.50%and100%3.25%and 50%4.100%and50%

Name the property of gases that help aquatic plants and animals to survive in the water?

Which of the following chemical formula is correct?

Statements: No note is a coin. Some coins are metals. All plastics are notes. Conclusions: I. No coin is plastic. II. All plastics being metals is a possibility.

0.231g of an organic substance gave 40 ml of moist nitrogen measured at 15^° C and745 mm pressure. Calculate the % of nitrogen (aq, tension at 15^° C is 12.7 mm)

समवयस्क हिंदी प्रेमियों की मंडली में कौन-कौन से लेखक मुख्य थे?

21. An ion is reduced to the element when it absorbs 6× 10 raise to power 20 electrons.The number of equivalent of the ion is .

Identify X in the following reaction: HCl + X → NaCl + H2CO3 H2CO3 → H2O + CO2

Is oil a solution or a compound?

What are polar covalent bonds? Please explain with an example.

How will you show the presence of water vapour in the atmosphere?

What is the state of ice cream?