5083 + Interview Questions in Chemistry Page 24 InterviewSolution

1151.	The standard reduction potentials at 298 K for the following half reactions are given: Which is the strongest reducing agent? Zn2+(aq.)+2e⇌Zn(s); −0.762 Cr3+(aq)+3e⇌Cr(s); −0.740 2H+(aq)+2e⇌H2(g); 0.00 Fe3+(aq)+e⇌Fe2+(aq); 0.770
Answer» The standard reduction potentials at 298 K for the following half reactions are given: Which is the strongest reducing agent? $Z n^{2 +} (a q .) + 2 e ⇌ Z n (s); - 0.762$ $C r^{3 +} (a q) + 3 e ⇌ C r (s); - 0.740$ $2 H^{+} (a q) + 2 e ⇌ H_{2} (g); 0.00$ $F e^{3 +} (a q) + e ⇌ F e^{2 +} (a q); 0.770$

Discussion

1152.	In a solution , the material which is present in less quantity us called as solute while the material present in large quantity is called as solvent but if two materials are present in equal amount then how we can classify it as solute and solvent?
Answer» In a solution , the material which is present in less quantity us called as solute while the material present in large quantity is called as solvent but if two materials are present in equal amount then how we can classify it as solute and solvent?

Discussion

1153.	Mention three differences between boiling and evaporation. [3 MARKS]
Answer» Mention three differences between boiling and evaporation. [3 MARKS]

Discussion

1154.	Matter has ______.
Answer» Matter has ______.

Discussion

1155.	What is a molecular formula?
Answer» What is a molecular formula?

Discussion

1156.	3. Does pure water conduct electricity? If not, what can we do to make it conduct?
Answer» 3. Does pure water conduct electricity? If not, what can we do to make it conduct?

Discussion

1157.	7.Meaning of rare medium and denser medium…
Answer» 7.Meaning of rare medium and denser medium…

Discussion

1158.	If α is the degree of dissociation of Na2SO4. The van't Hoff factor used for the calculation of molecular mass isOptions:Correct 1 + 2α1 – α1 + α1 – 2α
Answer» If α is the degree of dissociation of Na2SO4. The van't Hoff factor used for the calculation of molecular mass is Options: Correct 1 + 2α 1 – α 1 + α 1 – 2α

Discussion

1159.	Which of the following is/are the product of a neutralisation reaction?
Answer» Which of the following is/are the product of a neutralisation reaction?

Discussion

1160.	The taste of lime water (used in white-washing) is:
Answer» The taste of lime water (used in white-washing) is:

Discussion

1161.	Why are the eucalyptus trees grow near or along the sewage ?
Answer» Why are the eucalyptus trees grow near or along the sewage ?

Discussion

1162.	What is acid rain and how is it formed?
Answer» What is acid rain and how is it formed?

Discussion

1163.	EAN for Ni(dmg)2
Answer» EAN for Ni(dmg)2

Discussion

1164.	H2o2 n factor in acidic and basic medium
Answer» H2o2 n factor in acidic and basic medium

Discussion

1165.	Freon-114 used in refrigerators and air conditioners has a structural formula of:
Answer» Freon-114 used in refrigerators and air conditioners has a structural formula of:

Discussion

1166.	Is the pure milk that we get , really pure ? Justify answer
Answer» Is the pure milk that we get , really pure ? Justify answer

Discussion

1167.	What are the merits and demerits of expansion due to heat?
Answer» What are the merits and demerits of expansion due to heat?

Discussion

1168.	What is the difference between chemical formula and molecular formula?
Answer» What is the difference between chemical formula and molecular formula?

Discussion

1169.	Why are metallic containers not used to store pickles that are sour in taste ?
Answer» Why are metallic containers not used to store pickles that are sour in taste ?

Discussion

1170.	Which among the following is a participle? The delicious spread comprised mouth-watering salads, succulent pies and aromatic roasts.
Answer» Which among the following is a participle? The delicious spread comprised mouth-watering salads, succulent pies and aromatic roasts.

1170.

Which among the following is a participle? The delicious spread comprised mouth-watering salads, succulent pies and aromatic roasts.

Answer»

Which among the following is a participle?

The delicious spread comprised mouth-watering salads, succulent pies and aromatic roasts.

Discussion

1171.	Base + X → Salt + H2O Find X ?
Answer» Base + X $\to$ Salt + H₂O Find X ?

1171.

Base + X → Salt + H2O Find X ?

Answer»

Base + X $\to$ Salt + H₂O

Find X ?

Discussion

1172.	Deforestation is a reason for depletion of the water table. Do you agree? Give reasons.
Answer» Deforestation is a reason for depletion of the water table. Do you agree? Give reasons.

Discussion

1173.	Answer the following question:(a) What happens when a dilute acid reacts with a metal oxide? Explain with the help of an example.(b) Do metal oxides react with bases too? If yes, give an example.
Answer» Answer the following question: (a) What happens when a dilute acid reacts with a metal oxide? Explain with the help of an example. (b) Do metal oxides react with bases too? If yes, give an example.

Discussion

1174.	Application of silicon?
Answer» Application of silicon?

Discussion

1175.	Question 20Three elements B, Si and Ge are(a) metals(b) non-metals(c) metalloids(d) metal, non-metal and metalloid respectively
Answer» Question 20 Three elements B, Si and Ge are (a) metals (b) non-metals (c) metalloids (d) metal, non-metal and metalloid respectively

Discussion

1176.	Naturally occurring unrefined oil is known as ______.
Answer» Naturally occurring unrefined oil is known as ______.

Discussion

1177.	_______ is the book which keeps the record of endangered animals and plants.
Answer» _______ is the book which keeps the record of endangered animals and plants.

Discussion

1178.	The total time taken to percolate 500 ml of water is 50 min. What will be the percolation rate of the soil ?
Answer» The total time taken to percolate $500 m l$ of water is $50 m i n$ . What will be the percolation rate of the soil ?

Discussion

1179.	Question 11 (b) Fill in the blanks in the following statements. (b) Silk fibres come from ___ of silk ___
Answer» Question 11 (b) Fill in the blanks in the following statements. (b) Silk fibres come from ___ of silk ___

1179.

Question 11 (b) Fill in the blanks in the following statements. (b) Silk fibres come from _ of silk _

Answer»

Question 11 (b)

Fill in the blanks in the following statements.
(b) Silk fibres come from ___ of silk ___

Discussion

1180.	Which of the following causes have led or will lead to large extinction events in human history?
Answer» Which of the following causes have led or will lead to large extinction events in human history?

Discussion

1181.	Which one of the following method is used for separating chemical compounds using the difference in boiling points of the constituents and separates the mixture into its constituents?
Answer» Which one of the following method is used for separating chemical compounds using the difference in boiling points of the constituents and separates the mixture into its constituents?

Discussion

1182.	Which of the following are the alternate arrangements for sewage disposal?
Answer» Which of the following are the alternate arrangements for sewage disposal?

Discussion

1183.	Which of these is not stored in metal containers?
Answer» Which of these is not stored in metal containers?

Discussion

1184.	What happens when metal carbonates react with acid?
Answer» What happens when metal carbonates react with acid?

Discussion

1185.	Difference between compound and mixtures please explain me this very nicely as tomorrow is my exam
Answer» Difference between compound and mixtures please explain me this very nicely as tomorrow is my exam

Discussion

1186.	How silk obtained from silk warm explain in 500 words
Answer» How silk obtained from silk warm explain in 500 words

1186.

How silk obtained from silk warm explain in 500 words

Answer»

How silk obtained from silk warm explain in

500 words

Discussion

1187.	Froth floatation
Answer» Froth floatation

Discussion

1188.	What does a bimetallic strip consist of?
Answer» What does a bimetallic strip consist of?

Discussion

1189.	Name one acid-base indicator.
Answer» Name one acid-base indicator.

Discussion

1190.	Rearrange the jumbled letter 'EEBTOOTR' to obtain the name of an indicator. __
Answer» Rearrange the jumbled letter 'EEBTOOTR' to obtain the name of an indicator. __

1190.

Rearrange the jumbled letter 'EEBTOOTR' to obtain the name of an indicator. __

Answer»

Rearrange the jumbled letter 'EEBTOOTR' to obtain the name of an indicator.

__

Discussion

1191.	does more stable compound react or less stable on
Answer» does more stable compound react or less stable on

Discussion

1192.	15.The composition of equilibrium mixture (Cl2=2Cl)which is attained at 1200degree Celsius , is determined by measuring the rate of effusion through a pinhole . It is observed that at 1.80 mm hg pressure , the mixture effuses 1.16 times as fast as Krypton effuses under the same condition. Calculate the fraction of chlorine molecules dissociated into atoms
Answer» 15.The composition of equilibrium mixture (Cl2=2Cl)which is attained at 1200degree Celsius , is determined by measuring the rate of effusion through a pinhole . It is observed that at 1.80 mm hg pressure , the mixture effuses 1.16 times as fast as Krypton effuses under the same condition. Calculate the fraction of chlorine molecules dissociated into atoms

Discussion

1193.	The emf of the cell in which the following reaction occurs is found to be 0.5105 at 298 K Zn(s) +Ni+(0.1M) -changes to Zn+(1M) +Ni(s). Thw standard emf of the cell is (1)0.4810 V (2)0.5696 V (3)-0.5105 (4)0.5400 V
Answer» The emf of the cell in which the following reaction occurs is found to be 0.5105 at 298 K Zn(s) +Ni+(0.1M) -changes to Zn+(1M) +Ni(s). Thw standard emf of the cell is (1)0.4810 V (2)0.5696 V (3)-0.5105 (4)0.5400 V

Discussion

1194.	Answer the following 1) Manish conducted an experiment in the field related to the rate of percolation. He observed that it took 20 min for 400mL of water to percolate through the soil sample. Calculate the rate of percolation. 2) What is the importance of humus to the soil?
Answer» Answer the following 1) Manish conducted an experiment in the field related to the rate of percolation. He observed that it took 20 min for 400mL of water to percolate through the soil sample. Calculate the rate of percolation. 2) What is the importance of humus to the soil?

1194.

Answer the following 1) Manish conducted an experiment in the field related to the rate of percolation. He observed that it took 20 min for 400mL of water to percolate through the soil sample. Calculate the rate of percolation. 2) What is the importance of humus to the soil?

Answer»

Answer the following

1) Manish conducted an experiment in the field related to the rate of percolation. He observed that it took 20 min for 400mL of water to percolate through the soil sample. Calculate the rate of percolation.

2) What is the importance of humus to the soil?

Discussion

1195.	Metals generally occur in solid state. Name and write symbol of a metal that exists in liquid state at room temperature.
Answer» Metals generally occur in solid state. Name and write symbol of a metal that exists in liquid state at room temperature.

Discussion

1196.	What is the colour of turmeric when acid is applied to it?
Answer» What is the colour of turmeric when acid is applied to it?

Discussion

1197.	Iron when exposed to moisture and air, it gradually changes by process of
Answer» Iron when exposed to moisture and air, it gradually changes by process of

Discussion

1198.	Comprehension Iodine is an impor†an t subs†an ce needed by the body of a human being. We consume it in the form of salt, which has very very samll % con†an t of I_2. Iodine has various industrial application also. The following process has been used to obtain iodine from oil field brines in California: NaI+AgNO_3=AgI+NaNO_3 AgI+Fe=Fe+Ag FeI_2+Cl_2=FeCl_3+I_2 Q. If 381 kg of iodine is produced per hour,40kg then mass of AgNO_3 required per hour will be: (A) 170kg (B) 340kg (C) 255kg (D) 510kg Q. If above reaction is carried out by taking 150kg of NaI and 85kg of AgNO_3,then number of moles of iodine formed is: (A) 0.5 (B) 500 (C) 250 (D) 0.25
Answer» Comprehension Iodine is an impor†an t subs†an ce needed by the body of a human being. We consume it in the form of salt, which has very very samll % con†an t of I_2. Iodine has various industrial application also. The following process has been used to obtain iodine from oil field brines in California: NaI+AgNO_3=AgI+NaNO_3 AgI+Fe=Fe+Ag FeI_2+Cl_2=FeCl_3+I_2 Q. If 381 kg of iodine is produced per hour,40kg then mass of AgNO_3 required per hour will be: (A) 170kg (B) 340kg (C) 255kg (D) 510kg Q. If above reaction is carried out by taking 150kg of NaI and 85kg of AgNO_3,then number of moles of iodine formed is: (A) 0.5 (B) 500 (C) 250 (D) 0.25

Discussion

1199.	A good method to separate alum (phitkari) from impure samples is:
Answer» A good method to separate alum (phitkari) from impure samples is:

Discussion

1200.	How does the digestion of food an irreversible change?
Answer» How does the digestion of food an irreversible change?

Discussion

Explore topic-wise InterviewSolutions in .

The standard reduction potentials at 298 K for the following half reactions are given: Which is the strongest reducing agent? Zn2+(aq.)+2e⇌Zn(s); −0.762 Cr3+(aq)+3e⇌Cr(s); −0.740 2H+(aq)+2e⇌H2(g); 0.00 Fe3+(aq)+e⇌Fe2+(aq); 0.770

In a solution , the material which is present in less quantity us called as solute while the material present in large quantity is called as solvent but if two materials are present in equal amount then how we can classify it as solute and solvent?

Mention three differences between boiling and evaporation. [3 MARKS]

Matter has ______.

What is a molecular formula?

3. Does pure water conduct electricity? If not, what can we do to make it conduct?

7.Meaning of rare medium and denser medium…

If α is the degree of dissociation of Na2SO4. The van't Hoff factor used for the calculation of molecular mass isOptions:Correct 1 + 2α1 – α1 + α1 – 2α

Which of the following is/are the product of a neutralisation reaction?

The taste of lime water (used in white-washing) is:

Why are the eucalyptus trees grow near or along the sewage ?

What is acid rain and how is it formed?

EAN for Ni(dmg)2

H2o2 n factor in acidic and basic medium

Freon-114 used in refrigerators and air conditioners has a structural formula of:

Is the pure milk that we get , really pure ? Justify answer

What are the merits and demerits of expansion due to heat?

What is the difference between chemical formula and molecular formula?

Why are metallic containers not used to store pickles that are sour in taste ?

Which among the following is a participle? The delicious spread comprised mouth-watering salads, succulent pies and aromatic roasts.

Base + X → Salt + H2O Find X ?

Deforestation is a reason for depletion of the water table. Do you agree? Give reasons.

Answer the following question:(a) What happens when a dilute acid reacts with a metal oxide? Explain with the help of an example.(b) Do metal oxides react with bases too? If yes, give an example.

Application of silicon?

Question 20Three elements B, Si and Ge are(a) metals(b) non-metals(c) metalloids(d) metal, non-metal and metalloid respectively

Naturally occurring unrefined oil is known as ______.

_______ is the book which keeps the record of endangered animals and plants.

The total time taken to percolate 500 ml of water is 50 min. What will be the percolation rate of the soil ?

Question 11 (b) Fill in the blanks in the following statements. (b) Silk fibres come from ___ of silk ___

Which of the following causes have led or will lead to large extinction events in human history?

Which one of the following method is used for separating chemical compounds using the difference in boiling points of the constituents and separates the mixture into its constituents?

Which of the following are the alternate arrangements for sewage disposal?

Which of these is not stored in metal containers?

What happens when metal carbonates react with acid?

Difference between compound and mixtures please explain me this very nicely as tomorrow is my exam

How silk obtained from silk warm explain in 500 words

Froth floatation

What does a bimetallic strip consist of?

Name one acid-base indicator.

Rearrange the jumbled letter 'EEBTOOTR' to obtain the name of an indicator. __

does more stable compound react or less stable on

The emf of the cell in which the following reaction occurs is found to be 0.5105 at 298 K Zn(s) +Ni+(0.1M) -changes to Zn+(1M) +Ni(s). Thw standard emf of the cell is (1)0.4810 V (2)0.5696 V (3)-0.5105 (4)0.5400 V

Answer the following 1) Manish conducted an experiment in the field related to the rate of percolation. He observed that it took 20 min for 400mL of water to percolate through the soil sample. Calculate the rate of percolation. 2) What is the importance of humus to the soil?

Metals generally occur in solid state. Name and write symbol of a metal that exists in liquid state at room temperature.

What is the colour of turmeric when acid is applied to it?

Iron when exposed to moisture and air, it gradually changes by process of

A good method to separate alum (phitkari) from impure samples is:

How does the digestion of food an irreversible change?

Question 11 (b) Fill in the blanks in the following statements. (b) Silk fibres come from _ of silk _