5083 + Interview Questions in Chemistry Page 54 InterviewSolution

2651.	1. Balloons inflated by children 2. Crops harvested by farmers Which of these is/are examples of reversible(s) changes?
Answer» 1. Balloons inflated by children 2. Crops harvested by farmers Which of these is/are examples of reversible(s) changes?

2651.

1. Balloons inflated by children 2. Crops harvested by farmers Which of these is/are examples of reversible(s) changes?

Answer»

1. Balloons inflated by children
2. Crops harvested by farmers

Which of these is/are examples of reversible(s) changes?

2652.	Fluorine molecule is formed by sharing a pair of electrons by fluorine atoms. What kind of bond is formed?
Answer» Fluorine molecule is formed by sharing a pair of electrons by fluorine atoms. What kind of bond is formed?

Discussion

2653.	Which of the following is a part of inorganic impurity in sewage?
Answer» Which of the following is a part of inorganic impurity in sewage?

Discussion

2654.	Question 4Give examples for diatomic and triatomic molecules?
Answer» Question 4 Give examples for diatomic and triatomic molecules?

2654.

Question 4Give examples for diatomic and triatomic molecules?

Answer»

Question 4

Give examples for diatomic and triatomic molecules?

Discussion

2655.	Percentage of oxygen in earth crust is:
Answer» Percentage of oxygen in earth crust is:

Discussion

2656.	What is detergent?
Answer» What is detergent?

Discussion

2657.	What is meant by homogeneous mixture and heterogeneous mixture?
Answer» What is meant by homogeneous mixture and heterogeneous mixture?

Discussion

2658.	Which of the following statement is TRUE?
Answer» Which of the following statement is TRUE?

Discussion

2659.	To clean their spectacles, people often breathe out on glasses to make them wet. Explain why the glasses become wet.
Answer» To clean their spectacles, people often breathe out on glasses to make them wet. Explain why the glasses become wet.

Discussion

2660.	Question 44How do substances like carbon dioxide (CO2) and water (H2O) move in and out of the cell?
Answer» Question 44 How do substances like carbon dioxide $(C O_{2})$ and water $(H_{2} O)$ move in and out of the cell?

Discussion

2661.	Identify the part that distinguishes the setup of fractional distillation from simple distillation.
Answer» Identify the part that distinguishes the setup of fractional distillation from simple distillation.

Discussion

2662.	What is the correct sequence of operations involved in concrete production?
Answer» What is the correct sequence of operations involved in concrete production?

Discussion

2663.	Defination of petroleum refinery
Answer» Defination of petroleum refinery

Discussion

2664.	The E0cell for the given cell reaction is −0.32 V at 25oC.Fe(s)+Zn2+(aq)⇌Zn(s)+Fe2+(aq)What will be the value of log[Fe2+] at equilibrium when a piece of iron is placed in a 1 M of Zn2+ solution?
Answer» The $E_{c e l l}^{0}$ for the given cell reaction is $- 0.32 V$ at $25^{o} C$ . $F e (s) + Z n^{2 +} (a q) ⇌ Z n (s) + F e^{2 +} (a q)$ What will be the value of $log [F e^{2 +}]$ at equilibrium when a piece of iron is placed in a $1 M$ of $Z n^{2 +}$ solution?

Discussion

2665.	Which of the following is/are not the greenhouse gas(es)?
Answer» Which of the following is/are not the greenhouse gas(es)?

Discussion

2666.	(i) Suppose you want to dry your school uniform quickly. Would spreading it near an anghiti or heater help you? If yes, how?(ii) Take out a cool bottle of water from the refrigerator and keep it on a table. After some time you notice a puddle of water around it. Justify.
Answer» (i) Suppose you want to dry your school uniform quickly. Would spreading it near an anghiti or heater help you? If yes, how? (ii) Take out a cool bottle of water from the refrigerator and keep it on a table. After some time you notice a puddle of water around it. Justify.

2666.

(i) Suppose you want to dry your school uniform quickly. Would spreading it near an anghiti or heater help you? If yes, how?(ii) Take out a cool bottle of water from the refrigerator and keep it on a table. After some time you notice a puddle of water around it. Justify.

Answer»

(i) Suppose you want to dry your school uniform quickly. Would spreading it near an anghiti or heater help you? If yes, how?

(ii) Take out a cool bottle of water from the refrigerator and keep it on a table. After some time you notice a puddle of water around it. Justify.

Discussion

2667.	Explain how the use of CNG in automobiles has reduced pollution in our cities.
Answer» Explain how the use of CNG in automobiles has reduced pollution in our cities.

Discussion

2668.	5.length of potentiometer wire is l .acellemf E is balanced at a lengthl/3FROM POSITIVE END of wire.IF LENGTH OF WIRE INCREASED by l/2then what dist will same cellgive balanced point
Answer» 5.length of potentiometer wire is l .acellemf E is balanced at a lengthl/3FROM POSITIVE END of wire.IF LENGTH OF WIRE INCREASED by l/2then what dist will same cellgive balanced point

Discussion

2669.	List any five important uses of non metals.
Answer» List any five important uses of non metals.

Discussion

2670.	What is alloying?
Answer» What is alloying?

Discussion

2671.	41. The resistance of 0.5 M solution of an electrolyte in a cell was found to be 50 ohm. If the electrodes in the cell are 2.2 cm apart and have an area of 4.4 CM square then the molar conductivity(S m2 per mol) of the solution is
Answer» 41. The resistance of 0.5 M solution of an electrolyte in a cell was found to be 50 ohm. If the electrodes in the cell are 2.2 cm apart and have an area of 4.4 CM square then the molar conductivity(S m2 per mol) of the solution is

Discussion

2672.	The pressure of H2 required to make the potential of H2 electrode zero in pure water at 298 K is
Answer» The pressure of $H_{2}$ required to make the potential of $H_{2}$ electrode zero in pure water at 298 K is

Discussion

2673.	Describe the process of neutralisation with the help of an example.
Answer» Describe the process of neutralisation with the help of an example.

Discussion

2674.	Question 38.Salt A commonly used in bakery products on heating gets converted into another salt B which itself is used for removal of hardness of water and a gas C is evolved. The gas C when passed through lime water, turns it milky. Identify A,B and C
Answer» Question 38. Salt A commonly used in bakery products on heating gets converted into another salt B which itself is used for removal of hardness of water and a gas C is evolved. The gas C when passed through lime water, turns it milky. Identify A,B and C

Discussion

2675.	Define matter. What are the characteristics of matter?
Answer» Define matter. What are the characteristics of matter?

Discussion

2676.	what are mediating particles
Answer» what are mediating particles

Discussion

2677.	Which of these is a polyatomic ion?
Answer» Which of these is a polyatomic ion?

Discussion

2678.	Which chemical do we apply on the skin at the bee sting site?
Answer» Which chemical do we apply on the skin at the bee sting site?

Discussion

2679.	Name the source from which litmus solution is obtained.
Answer» Name the source from which litmus solution is obtained.

2679.

Name the source from which litmus solution is obtained.

Answer»

Name the source from which litmus solution is obtained.

Discussion

2680.	The correct way of making a solution of an acid in water is to:
Answer» The correct way of making a solution of an acid in water is to:

Discussion

2681.	What do you mean by matter? Give five examples.
Answer» What do you mean by matter? Give five examples.

Discussion

2682.	HA is a weak electrolyte, the degree of dissociation of 0.5 mol L_1 HA is 0.1 what is molar conductivity (in Scm2 mol_1)? , The limiting molar conductivity of HA is 390 Scm2 mol_1
Answer» HA is a weak electrolyte, the degree of dissociation of 0.5 mol L_1 HA is 0.1 what is molar conductivity (in Scm2 mol_1)? , The limiting molar conductivity of HA is 390 Scm2 mol_1

Discussion

2683.	which of the following bases are strong or weak :- Barium HydroxideCalcium HydroxideAluminium Hydroxide Lithium Hydroxide Potassium Hydroxide Sodium Hydroxide
Answer» which of the following bases are strong or weak :- Barium Hydroxide Calcium Hydroxide Aluminium Hydroxide Lithium Hydroxide Potassium Hydroxide Sodium Hydroxide

Discussion

2684.	Appu’s father wants to grow onions on his farm. Appu’s farm has three kinds of soil in different areas. Onions grow best in loamy soil. So, Appu decided to measure the percolation rate for the three different soils on his farm. He used a device like the one shown below. Appu, however, forgot and added different quantities of water while testing the percolation rate for each soil. He measured the time taken for all the water added into the device to percolate and tabulated them.Soil NumberQuantity of water addedTime taken to percolate completelySoil 1500 mL300 minutesSoil 2200 mL30 minutesSoil 3100 mL300 minutesWhich soil must be used to grow onions?
Answer» Appu’s father wants to grow onions on his farm. Appu’s farm has three kinds of soil in different areas. Onions grow best in loamy soil. So, Appu decided to measure the percolation rate for the three different soils on his farm. He used a device like the one shown below. Appu, however, forgot and added different quantities of water while testing the percolation rate for each soil. He measured the time taken for all the water added into the device to percolate and tabulated them. $\begin{matrix} Soil Number & Quantity of water added & Time taken to percolate completely Soil 1 & 500 mL & 300 minutes Soil 2 & 200 mL & 30 minutes Soil 3 & 100 mL & 300 minutes \end{matrix}$ Which soil must be used to grow onions?

2684.

Appu’s father wants to grow onions on his farm. Appu’s farm has three kinds of soil in different areas. Onions grow best in loamy soil. So, Appu decided to measure the percolation rate for the three different soils on his farm. He used a device like the one shown below. Appu, however, forgot and added different quantities of water while testing the percolation rate for each soil. He measured the time taken for all the water added into the device to percolate and tabulated them.Soil NumberQuantity of water addedTime taken to percolate completelySoil 1500 mL300 minutesSoil 2200 mL30 minutesSoil 3100 mL300 minutesWhich soil must be used to grow onions?

Answer»

Appu’s father wants to grow onions on his farm. Appu’s farm has three kinds of soil in different areas. Onions grow best in loamy soil. So, Appu decided to measure the percolation rate for the three different soils on his farm. He used a device like the one shown below. Appu, however, forgot and added different quantities of water while testing the percolation rate for each soil. He measured the time taken for all the water added into the device to percolate and tabulated them.

$\begin{matrix} Soil Number & Quantity of water added & Time taken to percolate completely Soil 1 & 500 mL & 300 minutes Soil 2 & 200 mL & 30 minutes Soil 3 & 100 mL & 300 minutes \end{matrix}$

Which soil must be used to grow onions?

Discussion

2685.	Aristotlethen moved forward with the concept and told class that all the changes thatare not reversible change are irreversible change. So which of the followingstatements define irreversible change?
Answer» Aristotle then moved forward with the concept and told class that all the changes that are not reversible change are irreversible change. So which of the following statements define irreversible change?

Discussion

2686.	How do the habit of overwatering leads to contamination of the ground water?
Answer» How do the habit of overwatering leads to contamination of the ground water?

Discussion

2687.	Question 7Which among the following is (are) double displacement reaction(s)?(i) Pb+CuCl2→PbCl2+Cu(ii) Na2SO4+BaCl2→BaSO4+2NaCl(iii) C+O2→CO2(iv) CH4+2O2→CO2+2H2O(a) (i) and (iv)(b) (ii) only(c) (i) and (ii)(d) (iii) and (iv)
Answer» Question 7 Which among the following is (are) double displacement reaction(s)? (i) $Pb + {CuCl}_{2} \to {PbCl}_{2} + Cu$ (ii) ${Na}_{2} {SO}_{4} + {BaCl}_{2} \to {BaSO}_{4} + 2 NaCl$ (iii) $C + O_{2} \to {CO}_{2}$ (iv) ${CH}_{4} + 2 O_{2} \to {CO}_{2} + 2 H_{2} O$ (a) (i) and (iv) (b) (ii) only (c) (i) and (ii) (d) (iii) and (iv)

Discussion

2688.	If chemistry says that we are made up of matter and biology says we are made up of cells ,what are we exactly made up of?? If we are made of atoms why don't we share and take electrons?
Answer» If chemistry says that we are made up of matter and biology says we are made up of cells ,what are we exactly made up of?? If we are made of atoms why don't we share and take electrons?

2688.

If chemistry says that we are made up of matter and biology says we are made up of cells ,what are we exactly made up of?? If we are made of atoms why don't we share and take electrons?

Answer»

If chemistry says that we are made up of matter and biology says we are made up of cells ,what are we exactly made up of??

If we are made of atoms why don't we share and take electrons?

Discussion

2689.	Balance the equation: Cu+6HNO3>Cu(NO3)2 +NO+H2OAlso show the steps involved
Answer» Balance the equation: Cu+6HNO3>Cu(NO3)2 +NO+H2O Also show the steps involved

Discussion

2690.	When carbon dioxide is passed through lime water, it turns milky due to the formation of .
Answer» When carbon dioxide is passed through lime water, it turns milky due to the formation of .

Discussion

2691.	What are drying or desiccating agents? Give examples
Answer» What are drying or desiccating agents? Give examples

Discussion

2692.	In a chemical formula of a diatomic ionic compound, the valency of the anion is 3. Find out the valency of the cation.
Answer» In a chemical formula of a diatomic ionic compound, the valency of the anion is 3. Find out the valency of the cation.

Discussion

2693.	Écoutez et cochez ce qu'ils achètent.1. (a) le blouson brun (b) le blouson noir2. (a) les souliers gris (b) les souliers noirs3. (a) le pull bleu (b) le pull rouge4. (a) les boîtes roses (b) les boîtes rouges5. (a) la chemise grise (b) la chemise verte
Answer» Écoutez et cochez ce qu'ils achètent. 1. (a) le blouson brun (b) le blouson noir 2. (a) les souliers gris (b) les souliers noirs 3. (a) le pull bleu (b) le pull rouge 4. (a) les boîtes roses (b) les boîtes rouges 5. (a) la chemise grise (b) la chemise verte

Discussion

2694.	Question 44(a)The following reaction takes place when aluminium powder is heated with MnO2:3MnO2(s)+4Al (s)→3Mn (l)+2Al2O3(l)+HeatIs aluminium getting reduced?
Answer» Question 44(a) The following reaction takes place when aluminium powder is heated with ${MnO}_{2}$ : $3 {MnO}_{2} (s) + 4 Al (s) \to 3 Mn (l) + 2 {Al}_{2} O_{3} (l) + Heat$ Is aluminium getting reduced?

Discussion

2695.	Rusting of iron is both chemical and physical change . Why?
Answer» Rusting of iron is both chemical and physical change . Why?

Discussion

2696.	Hydrogen chloride(HCl) reacts with metals to form:
Answer» Hydrogen chloride(HCl) reacts with metals to form:

Discussion

2697.	What will happen if the process of Evaporation does not takes place?
Answer» What will happen if the process of Evaporation does not takes place?

Discussion

2698.	When potassium permanganate is heated it produces potassium manganate, manganese dioxide and oxygen gas. This is an example of ______ reaction.
Answer» When potassium permanganate is heated it produces potassium manganate, manganese dioxide and oxygen gas. This is an example of ______ reaction.

Discussion

2699.	69. for the reaction 2Fe(NO3)2+ 3Na2CO3 gives rise to Fe2(CO3)3 +6NaNO3 initially if 2.5 mole of Fe(NO3)2 and 3.6 mole of Na2CO3 is taken if 6.3 mole of NaNO3 is obtained then percentage of the given reaction is
Answer» 69. for the reaction 2Fe(NO3)2+ 3Na2CO3 gives rise to Fe2(CO3)3 +6NaNO3 initially if 2.5 mole of Fe(NO3)2 and 3.6 mole of Na2CO3 is taken if 6.3 mole of NaNO3 is obtained then percentage of the given reaction is

Discussion

2700.	What is the equivalent mass of S_2O_3^{2- }following disproportionation reaction,S_2O_3^{2-} ---> S_4O_6^{2-} + S_2^{2-}where the charge abe species represents chargeon the ion and not oxidation state?(b) 22(a) 132(d) 113.15(c) 130.6
Answer» What is the equivalent mass of S_2O_3^{2- }following disproportionation reaction,S_2O_3^{2-} ---> S_4O_6^{2-} + S_2^{2-}where the charge abe species represents chargeon the ion and not oxidation state?(b) 22(a) 132(d) 113.15(c) 130.6

Discussion

Explore topic-wise InterviewSolutions in .

1. Balloons inflated by children 2. Crops harvested by farmers Which of these is/are examples of reversible(s) changes?

Fluorine molecule is formed by sharing a pair of electrons by fluorine atoms. What kind of bond is formed?

Which of the following is a part of inorganic impurity in sewage?

Question 4Give examples for diatomic and triatomic molecules?

Percentage of oxygen in earth crust is:

What is detergent?

What is meant by homogeneous mixture and heterogeneous mixture?

Which of the following statement is TRUE?

To clean their spectacles, people often breathe out on glasses to make them wet. Explain why the glasses become wet.

Question 44How do substances like carbon dioxide (CO2) and water (H2O) move in and out of the cell?

Identify the part that distinguishes the setup of fractional distillation from simple distillation.

What is the correct sequence of operations involved in concrete production?

Defination of petroleum refinery

The E0cell for the given cell reaction is −0.32 V at 25oC.Fe(s)+Zn2+(aq)⇌Zn(s)+Fe2+(aq)What will be the value of log[Fe2+] at equilibrium when a piece of iron is placed in a 1 M of Zn2+ solution?

Which of the following is/are not the greenhouse gas(es)?

(i) Suppose you want to dry your school uniform quickly. Would spreading it near an anghiti or heater help you? If yes, how?(ii) Take out a cool bottle of water from the refrigerator and keep it on a table. After some time you notice a puddle of water around it. Justify.

Explain how the use of CNG in automobiles has reduced pollution in our cities.

5.length of potentiometer wire is l .acellemf E is balanced at a lengthl/3FROM POSITIVE END of wire.IF LENGTH OF WIRE INCREASED by l/2then what dist will same cellgive balanced point

List any five important uses of non metals.

What is alloying?

41. The resistance of 0.5 M solution of an electrolyte in a cell was found to be 50 ohm. If the electrodes in the cell are 2.2 cm apart and have an area of 4.4 CM square then the molar conductivity(S m2 per mol) of the solution is

The pressure of H2 required to make the potential of H2 electrode zero in pure water at 298 K is

Describe the process of neutralisation with the help of an example.

Question 38.Salt A commonly used in bakery products on heating gets converted into another salt B which itself is used for removal of hardness of water and a gas C is evolved. The gas C when passed through lime water, turns it milky. Identify A,B and C

Define matter. What are the characteristics of matter?

what are mediating particles

Which of these is a polyatomic ion?

Which chemical do we apply on the skin at the bee sting site?

Name the source from which litmus solution is obtained.

The correct way of making a solution of an acid in water is to:

What do you mean by matter? Give five examples.

HA is a weak electrolyte, the degree of dissociation of 0.5 mol L_1 HA is 0.1 what is molar conductivity (in Scm2 mol_1)? , The limiting molar conductivity of HA is 390 Scm2 mol_1

which of the following bases are strong or weak :- Barium HydroxideCalcium HydroxideAluminium Hydroxide Lithium Hydroxide Potassium Hydroxide Sodium Hydroxide

Aristotlethen moved forward with the concept and told class that all the changes thatare not reversible change are irreversible change. So which of the followingstatements define irreversible change?

How do the habit of overwatering leads to contamination of the ground water?

Question 7Which among the following is (are) double displacement reaction(s)?(i) Pb+CuCl2→PbCl2+Cu(ii) Na2SO4+BaCl2→BaSO4+2NaCl(iii) C+O2→CO2(iv) CH4+2O2→CO2+2H2O(a) (i) and (iv)(b) (ii) only(c) (i) and (ii)(d) (iii) and (iv)

If chemistry says that we are made up of matter and biology says we are made up of cells ,what are we exactly made up of?? If we are made of atoms why don't we share and take electrons?

Balance the equation: Cu+6HNO3>Cu(NO3)2 +NO+H2OAlso show the steps involved

When carbon dioxide is passed through lime water, it turns milky due to the formation of .

What are drying or desiccating agents? Give examples

In a chemical formula of a diatomic ionic compound, the valency of the anion is 3. Find out the valency of the cation.

Écoutez et cochez ce qu'ils achètent.1. (a) le blouson brun (b) le blouson noir2. (a) les souliers gris (b) les souliers noirs3. (a) le pull bleu (b) le pull rouge4. (a) les boîtes roses (b) les boîtes rouges5. (a) la chemise grise (b) la chemise verte

Question 44(a)The following reaction takes place when aluminium powder is heated with MnO2:3MnO2(s)+4Al (s)→3Mn (l)+2Al2O3(l)+HeatIs aluminium getting reduced?

Rusting of iron is both chemical and physical change . Why?

Hydrogen chloride(HCl) reacts with metals to form:

What will happen if the process of Evaporation does not takes place?

When potassium permanganate is heated it produces potassium manganate, manganese dioxide and oxygen gas. This is an example of ______ reaction.

69. for the reaction 2Fe(NO3)2+ 3Na2CO3 gives rise to Fe2(CO3)3 +6NaNO3 initially if 2.5 mole of Fe(NO3)2 and 3.6 mole of Na2CO3 is taken if 6.3 mole of NaNO3 is obtained then percentage of the given reaction is

What is the equivalent mass of S_2O_3^{2- }following disproportionation reaction,S_2O_3^{2-} ---> S_4O_6^{2-} + S_2^{2-}where the charge abe species represents chargeon the ion and not oxidation state?(b) 22(a) 132(d) 113.15(c) 130.6