10223 + Interview Questions in Chemistry Page 101 InterviewSolution

5001.	How when delta H is negative solubility decreases with temperature
Answer» How when delta H is negative solubility decreases with temperature

Discussion

5002.	15. 2.2 g of a compound of phosphorous and sulphur has 1.24 g of 'P' in it.Its emperical formula is-
Answer» 15. 2.2 g of a compound of phosphorous and sulphur has 1.24 g of 'P' in it.Its emperical formula is-

Discussion

5003.	The mass numbers of Ne and B are ______ and _________respectively.
Answer» The mass numbers of Ne and B are ______ and _________respectively.

Discussion

5004.	What type of the covalent bond formed in a di-nitrogen molecule?
Answer» What type of the covalent bond formed in a di-nitrogen molecule?

Discussion

5005.	For the reaction 2N2O5 -> 4NO2 + O2 the rate of formation of O2 is 0.032ghr^-1 then rate of conversion of n2o5 in ghr^-1 is
Answer» For the reaction 2N2O5 -> 4NO2 + O2 the rate of formation of O2 is 0.032ghr^-1 then rate of conversion of n2o5 in ghr^-1 is

Discussion

5006.	4 calculate the ph of a solution obtained by mixing 2ml of HCl of ph 2 and 3 ml of solution of KOH of ph=12 a)10.30 b)3.70 c)11.30 d)none of these
Answer» 4 calculate the ph of a solution obtained by mixing 2ml of HCl of ph 2 and 3 ml of solution of KOH of ph=12 a)10.30 b)3.70 c)11.30 d)none of these

Discussion

5007.	Give reason for the following observation : The smell of hot sizzling food reaches us even from a considerable distance but to get the smell from cold food, we have to go close to it.
Answer» Give reason for the following observation : The smell of hot sizzling food reaches us even from a considerable distance but to get the smell from cold food, we have to go close to it.

5007.

Give reason for the following observation : The smell of hot sizzling food reaches us even from a considerable distance but to get the smell from cold food, we have to go close to it.

Answer»

Give reason for the following observation :

The smell of hot sizzling food reaches us even from a considerable distance but to get the smell from cold food, we have to go close to it.

Discussion

5008.	Assertion: The formal oxidation number of sulphur in Na2S4O6 is 2.5 Reason: Two S-atoms are not directly linked with O-atomsselect: Assertion: The formal oxidation number of sulphur in Na2S4O6 is 2.5 Reason: Two S-atoms are not directly linked with O-atoms
Answer» Assertion: The formal oxidation number of sulphur in Na2S4O6 is 2.5 Reason: Two S-atoms are not directly linked with O-atomsselect: Assertion: The formal oxidation number of sulphur in Na2S4O6 is 2.5 Reason: Two S-atoms are not directly linked with O-atoms

Discussion

5009.	Electrode potential,standard potential and reduction potential are something?
Answer» Electrode potential,standard potential and reduction potential are something?

Discussion

5010.	2 litres SO2 gas at 1 atm pressure is tranferred to 10 litre flask containing O2 . The partial pressure of SO2 in 10 litre flask is
Answer» 2 litres SO2 gas at 1 atm pressure is tranferred to 10 litre flask containing O2 . The partial pressure of SO2 in 10 litre flask is

Discussion

5011.	Which of the following pairs does not contain unsaturated hydrocarbons?
Answer» Which of the following pairs does not contain unsaturated hydrocarbons?

Discussion

5012.	37. Weight of NA{Avogadro no.} number of proton.
Answer» 37. Weight of NA{Avogadro no.} number of proton.

Discussion

5013.	Is atom indivisible.
Answer» Is atom indivisible.

Discussion

5014.	A saturated solution is prepared by dissolving 36 gms. of Naoh in 150 ml of solution at 293 Kelvin. Find the concentration.
Answer» A saturated solution is prepared by dissolving 36 gms. of Naoh in 150 ml of solution at 293 Kelvin. Find the concentration.

Discussion

5015.	The radioactive isotope used in the treatment of cancer is: (a) plutonium-239 (b) arsenic-74 (c) cobalt - 60 (d) iodine-131
Answer» The radioactive isotope used in the treatment of cancer is: (a) plutonium-239 (b) arsenic-74 (c) cobalt - 60 (d) iodine-131

5015.

The radioactive isotope used in the treatment of cancer is: (a) plutonium-239 (b) arsenic-74 (c) cobalt - 60 (d) iodine-131

Answer»

The radioactive isotope used in the treatment of cancer is:

(a) plutonium-239

(b) arsenic-74

(c) cobalt - 60

(d) iodine-131

Discussion

5016.	Calculate the average K.E of one molecule of hydrogen and oxygen gas at 0 degree celcius.
Answer» Calculate the average K.E of one molecule of hydrogen and oxygen gas at 0 degree celcius.

Discussion

5017.	the electron and proton in hydrogen atom is separated by a distance of about 5.3*10^-11. find the magnitudes of the electric force and gravitational force that each particle exerts on the other and the ratio of electric to gravitational force
Answer» the electron and proton in hydrogen atom is separated by a distance of about 5.3*10^-11. find the magnitudes of the electric force and gravitational force that each particle exerts on the other and the ratio of electric to gravitational force

Discussion

5018.	The number of atoms in 0.1 mol of a triatomic gas is (NA=6.02×1023 mol−1)
Answer» The number of atoms in $0.1 m o l$ of a triatomic gas is $(N_{A} = 6.02 \times 10^{23} m o l^{- 1})$

Discussion

5019.	what is magnetic bottle?
Answer» what is magnetic bottle?

Discussion

5020.	Who developed modern system of chemical formula notation?
Answer» Who developed modern system of chemical formula notation?

Discussion

5021.	As the number of carbon atoms in a chain increases, the boiling point of alkanes _________.
Answer» As the number of carbon atoms in a chain increases, the boiling point of alkanes _________.

Discussion

5022.	A steel of internal volume 20 litres is filled with hydrogen at 29 atmospheric pressure. If hydrogen is used to fill a balloon at 1.25 atmospheric pressure at the same temperatue, what volume will the gas occupy?
Answer» A steel of internal volume 20 litres is filled with hydrogen at 29 atmospheric pressure. If hydrogen is used to fill a balloon at 1.25 atmospheric pressure at the same temperatue, what volume will the gas occupy?

Discussion

5023.	Explain crystal lattice.
Answer» Explain crystal lattice.

Discussion

5024.	Question 3(ii) Samples of four metals A, B, C and D were taken and added to the following solution one by one. The results obtained have been tabulated as follows: MetalIron(II)sulphateCooper(II)sulphateZinc sulphateSilver nitrateA.No reactionDisplacementB.DisplacementNo reactionC.No reactionNo reactionNo reactionDisplacementD.No reactionNo reactionNo reactionNo reaction Use the Table above to answer the following questions about metals A, B, C and D. (ii) What would you observe if B is added to a solution of copper (II) sulphate?
Answer» Question 3(ii) Samples of four metals A, B, C and D were taken and added to the following solution one by one. The results obtained have been tabulated as follows: $\begin{matrix} M e t a l & I r o n (I I) s u l p h a t e & C o o p e r (I I) s u l p h a t e & Z i n c s u l p h a t e & S i l v e r n i t r a t e A . & N o r e a c t i o n & D i s p l a c e m e n t B . & D i s p l a c e m e n t & N o r e a c t i o n C . & N o r e a c t i o n & N o r e a c t i o n & N o r e a c t i o n & D i s p l a c e m e n t D . & N o r e a c t i o n & N o r e a c t i o n & N o r e a c t i o n & N o r e a c t i o n \end{matrix}$ Use the Table above to answer the following questions about metals A, B, C and D. (ii) What would you observe if B is added to a solution of copper (II) sulphate?

Discussion

5025.	What is the basic principle behind simple distillation process?
Answer» What is the basic principle behind simple distillation process?

Discussion

5026.	How to calculate the molicular mass of any atom
Answer» How to calculate the molicular mass of any atom

Discussion

5027.	Which one of the following has minimum number of molecules?
Answer» Which one of the following has minimum number of molecules?

Discussion

5028.	what is crossed canizzaro reaction?
Answer» what is crossed canizzaro reaction?

Discussion

5029.	Which of the following pairs has isoelectronic species?
Answer» Which of the following pairs has isoelectronic species?

Discussion

5030.	Q. Why do solids have a geometrical shapes?
Answer» Q. Why do solids have a geometrical shapes?

Discussion

5031.	One mole of molecules may not be equal to:
Answer» One mole of molecules may not be equal to:

Discussion

5032.	What will be the value of 'A+B+C' if the following reaction is balanced?AFeCl3(aq) + BMgO (s) 🡪 Fe2O3(s) + CMgCl2(aq)
Answer» What will be the value of 'A+B+C' if the following reaction is balanced? ${AFeCl}_{3} (aq) + BMgO (s) 🡪 {Fe}_{2} O_{3} (s) + {CMgCl}_{2} (aq)$

Discussion

5033.	The atoms shown above are
Answer» The atoms shown above are

5033.

The atoms shown above are

Answer»

The atoms shown above are

Discussion

5034.	3.65 gm equimolar mixture of NaOH and Na_2 CO_3, is titrated against 0.1 M HCl using phenolphthalein as an indicator, V1 mL of acid was required to reach end point. In another experiment 3.65 gm of same mixture is titrated against 0.2 M HCl using methylorange as an indicator, V_{2 }mL of acid was required to reach end point. V1 + V2 is :
Answer» 3.65 gm equimolar mixture of NaOH and Na_2 CO_3, is titrated against 0.1 M HCl using phenolphthalein as an indicator, V1 mL of acid was required to reach end point. In another experiment 3.65 gm of same mixture is titrated against 0.2 M HCl using methylorange as an indicator, V_{2 }mL of acid was required to reach end point. V1 + V2 is :

Discussion

5035.	Below given are some of the ammonia fertilizers,which would you suggest is the best to use?
Answer» Below given are some of the ammonia fertilizers,which would you suggest is the best to use?

Discussion

5036.	23. What is the actual meaning of orbital and spin angular momentum?
Answer» 23. What is the actual meaning of orbital and spin angular momentum?

Discussion

5037.	Question 12Salt can be recovered from its solution by evaporation. Suggest some other technique for the same?
Answer» Question 12 Salt can be recovered from its solution by evaporation. Suggest some other technique for the same?

Discussion

5038.	The number of reactants in a decomposition reaction is:
Answer» The number of reactants in a decomposition reaction is:

Discussion

5039.	If an element has 3 electrons in total, how will you distribute it among the shells?
Answer» If an element has 3 electrons in total, how will you distribute it among the shells?

Discussion

5040.	Question 15Plastic is used for making a large variety of articles of daily use and these articles are very attractive. But it is advised to avoid the use of plastic as far as possible. Why?
Answer» Question 15 Plastic is used for making a large variety of articles of daily use and these articles are very attractive. But it is advised to avoid the use of plastic as far as possible. Why?

Discussion

5041.	Why HCl cannot be used for carrying out acid- base titrations WHY only H2SO4 can be only used
Answer» Why HCl cannot be used for carrying out acid- base titrations WHY only H2SO4 can be only used

Discussion

5042.	When the vapour pressure of a liquid is equal to its atmospheric pressure, then it
Answer» When the vapour pressure of a liquid is equal to its atmospheric pressure, then it

Discussion

5043.	44. Which polymer have C-O-C linkage? 1) Bakelite 2)Melamine formaldehyde resin 3)Starch 4) Both 2 & 3
Answer» 44. Which polymer have C-O-C linkage? 1) Bakelite 2)Melamine formaldehyde resin 3)Starch 4) Both 2 & 3

Discussion

5044.	20. A heated iron block at 200^° C lose 480 J of heat to the surroundings which is at room temperature of 30^° C. Calculate (i) The entropy change of the system (iron block). (ii) The total entropy change in the surroundings. (iii) The total entropy change in the universe due to this process. Assume that the temperature of the block and atmosphere remains constant.
Answer» 20. A heated iron block at 200^° C lose 480 J of heat to the surroundings which is at room temperature of 30^° C. Calculate (i) The entropy change of the system (iron block). (ii) The total entropy change in the surroundings. (iii) The total entropy change in the universe due to this process. Assume that the temperature of the block and atmosphere remains constant.

Discussion

5045.	Assume that Millikan performed the oil drop experiment. In the oil drop experiment, the following charges(in arbitrary units) were found on a series of oil droplets. The data obtained is as follows: 2 × 10−19 C 4 × 10−19 C 6 × 10−19 C Calculate the magnitude of the charge on the electron.
Answer» Assume that Millikan performed the oil drop experiment. In the oil drop experiment, the following charges(in arbitrary units) were found on a series of oil droplets. The data obtained is as follows: 2 $\times$ $10^{- 19}$ C 4 $\times$ $10^{- 19}$ C 6 $\times$ $10^{- 19}$ C Calculate the magnitude of the charge on the electron.

Discussion

5046.	if both ethyl and methyl group are present at identical position in a aliphatic carbon chain, what will be the case of numbering of carbon
Answer» if both ethyl and methyl group are present at identical position in a aliphatic carbon chain, what will be the case of numbering of carbon

Discussion

5047.	Why should the course of antibiotics be finished?
Answer» Why should the course of antibiotics be finished?

Discussion

5048.	How to compare the valency of second period elements with respect to oxygen
Answer» How to compare the valency of second period elements with respect to oxygen

Discussion

5049.	What is the chemical name of ionic compound MgCl2?
Answer» What is the chemical name of ionic compound $M g C l_{2}$ ?

Discussion

5050.	Milk of Magnesia is an example of :
Answer» Milk of Magnesia is an example of :

Discussion

Explore topic-wise InterviewSolutions in .

How when delta H is negative solubility decreases with temperature

15. 2.2 g of a compound of phosphorous and sulphur has 1.24 g of 'P' in it.Its emperical formula is-

The mass numbers of Ne and B are ______ and _________respectively.

What type of the covalent bond formed in a di-nitrogen molecule?

For the reaction 2N2O5 -> 4NO2 + O2 the rate of formation of O2 is 0.032ghr^-1 then rate of conversion of n2o5 in ghr^-1 is

4 calculate the ph of a solution obtained by mixing 2ml of HCl of ph 2 and 3 ml of solution of KOH of ph=12 a)10.30 b)3.70 c)11.30 d)none of these

Give reason for the following observation : The smell of hot sizzling food reaches us even from a considerable distance but to get the smell from cold food, we have to go close to it.

Assertion: The formal oxidation number of sulphur in Na2S4O6 is 2.5 Reason: Two S-atoms are not directly linked with O-atomsselect: Assertion: The formal oxidation number of sulphur in Na2S4O6 is 2.5 Reason: Two S-atoms are not directly linked with O-atoms

Electrode potential,standard potential and reduction potential are something?

2 litres SO2 gas at 1 atm pressure is tranferred to 10 litre flask containing O2 . The partial pressure of SO2 in 10 litre flask is

Which of the following pairs does not contain unsaturated hydrocarbons?

37. Weight of NA{Avogadro no.} number of proton.

Is atom indivisible.

A saturated solution is prepared by dissolving 36 gms. of Naoh in 150 ml of solution at 293 Kelvin. Find the concentration.

The radioactive isotope used in the treatment of cancer is: (a) plutonium-239 (b) arsenic-74 (c) cobalt - 60 (d) iodine-131

Calculate the average K.E of one molecule of hydrogen and oxygen gas at 0 degree celcius.

the electron and proton in hydrogen atom is separated by a distance of about 5.3*10^-11. find the magnitudes of the electric force and gravitational force that each particle exerts on the other and the ratio of electric to gravitational force

The number of atoms in 0.1 mol of a triatomic gas is (NA=6.02×1023 mol−1)

what is magnetic bottle?

Who developed modern system of chemical formula notation?

As the number of carbon atoms in a chain increases, the boiling point of alkanes _________.

A steel of internal volume 20 litres is filled with hydrogen at 29 atmospheric pressure. If hydrogen is used to fill a balloon at 1.25 atmospheric pressure at the same temperatue, what volume will the gas occupy?

Explain crystal lattice.

What is the basic principle behind simple distillation process?

How to calculate the molicular mass of any atom

Which one of the following has minimum number of molecules?

what is crossed canizzaro reaction?

Which of the following pairs has isoelectronic species?

Q. Why do solids have a geometrical shapes?

One mole of molecules may not be equal to:

What will be the value of 'A+B+C' if the following reaction is balanced?AFeCl3(aq) + BMgO (s) 🡪 Fe2O3(s) + CMgCl2(aq)

The atoms shown above are

Below given are some of the ammonia fertilizers,which would you suggest is the best to use?

23. What is the actual meaning of orbital and spin angular momentum?

Question 12Salt can be recovered from its solution by evaporation. Suggest some other technique for the same?

The number of reactants in a decomposition reaction is:

If an element has 3 electrons in total, how will you distribute it among the shells?

Question 15Plastic is used for making a large variety of articles of daily use and these articles are very attractive. But it is advised to avoid the use of plastic as far as possible. Why?

Why HCl cannot be used for carrying out acid- base titrations WHY only H2SO4 can be only used

When the vapour pressure of a liquid is equal to its atmospheric pressure, then it

44. Which polymer have C-O-C linkage? 1) Bakelite 2)Melamine formaldehyde resin 3)Starch 4) Both 2 & 3

Assume that Millikan performed the oil drop experiment. In the oil drop experiment, the following charges(in arbitrary units) were found on a series of oil droplets. The data obtained is as follows: 2 × 10−19 C 4 × 10−19 C 6 × 10−19 C Calculate the magnitude of the charge on the electron.

if both ethyl and methyl group are present at identical position in a aliphatic carbon chain, what will be the case of numbering of carbon

Why should the course of antibiotics be finished?

How to compare the valency of second period elements with respect to oxygen

What is the chemical name of ionic compound MgCl2?

Milk of Magnesia is an example of :

The mass numbers of Ne and B are and ___respectively.