15280 + Interview Questions in Chemistry Page 28 InterviewSolution

1351.	21.) What will be the mass of S, molecule in grams?(1) 10.62 x 10-23(2) 64 gg(3) 32 gT(4) 5.2 x 10 23 g
Answer» 21.) What will be the mass of S, molecule in grams?(1) 10.62 x 10-23(2) 64 gg(3) 32 gT(4) 5.2 x 10 23 g

Discussion

1352.	Choose the correct answer from the options given below:(i) The number of C−H bonds in ethane molecule are:(a) Four(b) Six(c) Eight(d) Ten(ii) The functional group present in acetic acid is:(a) Ketonic (>C=O)(b) Hydroxyl (− OH)(c) Aldehydic (− CHO)(d) Carboxyl (− COOH)(iii) The unsaturated hydrocarbons undergo:(a) a substitution reaction(b) an oxidation reaction(c) an addition reaction(d) none of the above
Answer» Choose the correct answer from the options given below: (i) The number of C−H bonds in ethane molecule are: (a) Four (b) Six (c) Eight (d) Ten (ii) The functional group present in acetic acid is: (a) Ketonic (>C=O) (b) Hydroxyl (− OH) (c) Aldehydic (− CHO) (d) Carboxyl (− COOH) (iii) The unsaturated hydrocarbons undergo: (a) a substitution reaction (b) an oxidation reaction (c) an addition reaction (d) none of the above

Discussion

1353.	Which statement about the manufacture of Ammonia by the Haber Process is correct?
Answer» Which statement about the manufacture of Ammonia by the Haber Process is correct?

Discussion

1354.	How is common salt obtained from seawater?
Answer» How is common salt obtained from seawater?

Discussion

1355.	Would you be able to check whether water is hard by using a detergent? Why?
Answer» Would you be able to check whether water is hard by using a detergent? Why?

Discussion

1356.	(a) HCl, HNO3 and H2SO4 are the formulae of three compounds. Which of these compounds has the highest boiling point and which has the lowest?(b) Dilute hydrochloric acid and dilute sulphuric acid are both colourless solutions. How will the addition of barium chloride solution to each help to distinguish between the two?
Answer» (a) HCl, HNO₃ and H₂SO₄ are the formulae of three compounds. Which of these compounds has the highest boiling point and which has the lowest? (b) Dilute hydrochloric acid and dilute sulphuric acid are both colourless solutions. How will the addition of barium chloride solution to each help to distinguish between the two?

Discussion

1357.	For an experiment, about 1 gram of copper was heated in a china dish, which resulted in the conversion of the copper powder into a black substance.A. Give the balanced reaction for the given process.B. Identify the type of reaction.
Answer» For an experiment, about 1 gram of copper was heated in a china dish, which resulted in the conversion of the copper powder into a black substance. A. Give the balanced reaction for the given process. B. Identify the type of reaction.

1357.

For an experiment, about 1 gram of copper was heated in a china dish, which resulted in the conversion of the copper powder into a black substance.A. Give the balanced reaction for the given process.B. Identify the type of reaction.

Answer»

For an experiment, about 1 gram of copper was heated in a china dish, which resulted in the conversion of the copper powder into a black substance.

A. Give the balanced reaction for the given process.

B. Identify the type of reaction.

Discussion

1358.	Answer the following questionsState work of WBCSD.
Answer» Answer the following questions State work of WBCSD.

1358.

Answer the following questionsState work of WBCSD.

Answer»

Answer the following questions

State work of WBCSD.

Discussion

1359.	Can sodium sulphide be concentrated by froth floation process. Why or why not? Explain
Answer» Can sodium sulphide be concentrated by froth floation process. Why or why not? Explain

Discussion

1360.	The limiting density of hydrogen bromide is 3.6108 at 0° c. The atomic weight of bromine is(At. wt. of hydrogen =1.008)
Answer» The limiting density of hydrogen bromide is 3.6108 at 0° c. The atomic weight of bromine is(At. wt. of hydrogen =1.008)

Discussion

1361.	What happens when the energy of a reaction if more than threshold energy? Is such a situation possible?
Answer» What happens when the energy of a reaction if more than threshold energy? Is such a situation possible?

Discussion

1362.	calculate the number of lone pairs and bond pairs in I3^- ?
Answer» calculate the number of lone pairs and bond pairs in I3^- ?

Discussion

1363.	How to find oxidising or reduction potential of an element?
Answer» How to find oxidising or reduction potential of an element?

Discussion

1364.	40. the number of molecules of H_2O_2 required to completely react with 400ml of 0.5 N KMnO_4 in acidic medium are...
Answer» 40. the number of molecules of H_2O_2 required to completely react with 400ml of 0.5 N KMnO_4 in acidic medium are...

Discussion

1365.	(a) What is meant by an addition reaction? Give an example (with equation) of an addition reaction of an alkene. (b) What is added to groundnut oil when it is to be converted to vanaspati ghee? (c) Which of the two is better for our health: butter or vegetable oil? Why?
Answer» (a) What is meant by an addition reaction? Give an example (with equation) of an addition reaction of an alkene. (b) What is added to groundnut oil when it is to be converted to vanaspati ghee? (c) Which of the two is better for our health: butter or vegetable oil? Why?

Discussion

1366.	Which of these is a salt–hydrochloric acid, sodium hydroxide, sodium chloride?
Answer» Which of these is a salt–hydrochloric acid, sodium hydroxide, sodium chloride?

Discussion

1367.	Which of the following has the maximum atomic radius?
Answer» Which of the following has the maximum atomic radius?

Discussion

1368.	The maximum number of carbon atoms present in one product among the expected products of the following reaction:
Answer» The maximum number of carbon atoms present in one product among the expected products of the following reaction:

Discussion

1369.	How to determine the value of n in the degree of association and dissociation formula ?
Answer» How to determine the value of n in the degree of association and dissociation formula ?

Discussion

1370.	Write a short note on Natural dyes.
Answer» Write a short note on Natural dyes.

Discussion

1371.	Select the options which describe the characteristics of diamonds.
Answer» Select the options which describe the characteristics of diamonds.

Discussion

1372.	A student measured the pH values of four solutions marked A, B, C and D and found them to be 6, 12, 2 and 14 respectively. The solution which is likely to be strongly acidic is :(1) A(2) B(3) C(4) D
Answer» A student measured the pH values of four solutions marked A, B, C and D and found them to be 6, 12, 2 and 14 respectively. The solution which is likely to be strongly acidic is : (1) A (2) B (3) C (4) D

Discussion

1373.	46.Difference between enantiomer and identical molecules.
Answer» 46.Difference between enantiomer and identical molecules.

Discussion

1374.	The figure given shows the transfer of energy in an ecosystem. In the given food chain, 10,000 J of energy is available with producers. Calculate and find the amount of energy received from producers to top carnivores.
Answer» The figure given shows the transfer of energy in an ecosystem. In the given food chain, 10,000 J of energy is available with producers. Calculate and find the amount of energy received from producers to top carnivores.

Discussion

1375.	A compound `X` has molecular formula C4H10. It undergoes substitution reaction readily than addition reaction. It burns with blue flame and is present in LPG. Identify `X'.
Answer» A compound `X` has molecular formula $C_{4} H_{10}$ . It undergoes substitution reaction readily than addition reaction. It burns with blue flame and is present in LPG. Identify `X'.

Discussion

1376.	A student dipped a pH paper in an unknown liquid. Orange colour was obtained. The unknown solution can be:
Answer» A student dipped a pH paper in an unknown liquid. Orange colour was obtained. The unknown solution can be:

Discussion

1377.	Which contains greater no. of oxygen atoms and why a. 1 gm O b. 1 gm O2 c. 1 gm O3 d. all have same
Answer» Which contains greater no. of oxygen atoms and why a. 1 gm O b. 1 gm O2 c. 1 gm O3 d. all have same

Discussion

1378.	Copper matte produced during the extraction of copper contains
Answer» Copper matte produced during the extraction of copper contains

Discussion

1379.	8.Standard vaporization of enthalpy of benzene at boiling point is 30.8kj/mol. For how long would 100 W electric heater have to operate in order to vaporise 100g benzene at that temperature?
Answer» 8.Standard vaporization of enthalpy of benzene at boiling point is 30.8kj/mol. For how long would 100 W electric heater have to operate in order to vaporise 100g benzene at that temperature?

Discussion

1380.	The number of unpaired electrons in a paramagnetic diatomic molecule of an element withatomic number 16 is
Answer» The number of unpaired electrons in a paramagnetic diatomic molecule of an element withatomic number 16 is

Discussion

1381.	Galvanization is applying a coating of:
Answer» Galvanization is applying a coating of:

Discussion

1382.	Which of the following gas causes a hole in the ozone layer?
Answer» Which of the following gas causes a hole in the ozone layer?

Discussion

1383.	Which of the following was true for Newland's Law of Octaves and his periodic table? (i) He arranged the elements in increasing order of their atomic weights. (ii) Every eighth element had properties similar to the first element. The relationship was just like every eighth note that resembles the first note in the octaves of music. (iii) He didn't take noble gases into account. (iv) None of the above
Answer» Which of the following was true for Newland's Law of Octaves and his periodic table? (i) He arranged the elements in increasing order of their atomic weights. (ii) Every eighth element had properties similar to the first element. The relationship was just like every eighth note that resembles the first note in the octaves of music. (iii) He didn't take noble gases into account. (iv) None of the above

Discussion

1384.	Why does pure nitric acid take on a yellowish brown colour when exposed to light?
Answer» Why does pure nitric acid take on a yellowish brown colour when exposed to light?

Discussion

1385.	State what you see, when silver nitrate solution is added to dilute HCl.
Answer» State what you see, when silver nitrate solution is added to dilute HCl.

Discussion

1386.	Consider the compound P(C4H9Cl).How many isomers will give 2-methylpropene after elimination?
Answer» Consider the compound $P (C_{4} H_{9} C l)$ . How many isomers will give 2-methylpropene after elimination?

Discussion

1387.	What is the trend of acidic strength of acids H2PO3, H3PO3 and H3PO4 and why?
Answer» What is the trend of acidic strength of acids H2PO3, H3PO3 and H3PO4 and why?

Discussion

1388.	(a) On which side of the periodic table will you find metals? (b) On which side of the periodic table will you find non-metals? (c) What is the name of those elements which divide metals and non-metals in the periodic table?
Answer» (a) On which side of the periodic table will you find metals? (b) On which side of the periodic table will you find non-metals? (c) What is the name of those elements which divide metals and non-metals in the periodic table?

1388.

(a) On which side of the periodic table will you find metals? (b) On which side of the periodic table will you find non-metals? (c) What is the name of those elements which divide metals and non-metals in the periodic table?

Answer»

(a) On which side of the periodic table will you find metals?

(b) On which side of the periodic table will you find non-metals?

(c) What is the name of those elements which divide metals and non-metals in the periodic table?

Discussion

1389.	Ashwini has been given four test-tubes containing the following:(a) Universal indicator(b) Distilled water(c) Sodium hydrogencarbonate(d) PhenolphthaleinWhat will be observed by Ashwini when he adds a few drops of acetic acid to each test-tube, one by one?
Answer» Ashwini has been given four test-tubes containing the following: (a) Universal indicator (b) Distilled water (c) Sodium hydrogencarbonate (d) Phenolphthalein What will be observed by Ashwini when he adds a few drops of acetic acid to each test-tube, one by one?

Discussion

1390.	Give the name and structural formula of next homologue of HCOOH.
Answer» Give the name and structural formula of next homologue of HCOOH.

Discussion

1391.	6g of Ethane C2H6 is burnt in excess of o2 .The moles of H2o formed would be
Answer» 6g of Ethane C2H6 is burnt in excess of o2 .The moles of H2o formed would be

Discussion

1392.	What is the IUPAC of isooctane
Answer» What is the IUPAC of isooctane

Discussion

1393.	Discuss the physical properties of carbon.
Answer» Discuss the physical properties of carbon.

Discussion

1394.	How does graphite conduct electricity?
Answer» How does graphite conduct electricity?

Discussion

1395.	The structure given below shows the isomeric form of
Answer» The structure given below shows the isomeric form of

1395.

The structure given below shows the isomeric form of

Answer»

The structure given below shows the isomeric form of

Discussion

1396.	Electrolytic reduction of alumina to aluminium by Hall-Heroult process is carried out:
Answer» Electrolytic reduction of alumina to aluminium by Hall-Heroult process is carried out:

Discussion

1397.	In water or in aqueous solution of HCl or H2SO4 proton exists as(1) H30^{+ }(2) H(H20)_4^+(3) H(H2O)_n^{}(4) All of these
Answer» In water or in aqueous solution of HCl or H2SO4 proton exists as(1) H30^{+ }(2) H(H20)_4^+(3) H(H2O)_n^{}(4) All of these

Discussion

1398.	Define ecosystem.
Answer» Define ecosystem.

Discussion

1399.	Which of the following methods are employed in the extraction of Sn from Cassiterite?
Answer» Which of the following methods are employed in the extraction of Sn from Cassiterite?

Discussion

1400.	Which element can be placed in the region marked by question mark ?
Answer» Which element can be placed in the region marked by question mark ?

Discussion

Explore topic-wise InterviewSolutions in .

21.) What will be the mass of S, molecule in grams?(1) 10.62 x 10-23(2) 64 gg(3) 32 gT(4) 5.2 x 10 23 g

Which statement about the manufacture of Ammonia by the Haber Process is correct?

How is common salt obtained from seawater?

Would you be able to check whether water is hard by using a detergent? Why?

For an experiment, about 1 gram of copper was heated in a china dish, which resulted in the conversion of the copper powder into a black substance.A. Give the balanced reaction for the given process.B. Identify the type of reaction.

Answer the following questionsState work of WBCSD.

Can sodium sulphide be concentrated by froth floation process. Why or why not? Explain

The limiting density of hydrogen bromide is 3.6108 at 0° c. The atomic weight of bromine is(At. wt. of hydrogen =1.008)

What happens when the energy of a reaction if more than threshold energy? Is such a situation possible?

calculate the number of lone pairs and bond pairs in I3^- ?

How to find oxidising or reduction potential of an element?

40. the number of molecules of H_2O_2 required to completely react with 400ml of 0.5 N KMnO_4 in acidic medium are...

(a) What is meant by an addition reaction? Give an example (with equation) of an addition reaction of an alkene. (b) What is added to groundnut oil when it is to be converted to vanaspati ghee? (c) Which of the two is better for our health: butter or vegetable oil? Why?

Which of these is a salt–hydrochloric acid, sodium hydroxide, sodium chloride?

Which of the following has the maximum atomic radius?

The maximum number of carbon atoms present in one product among the expected products of the following reaction:

How to determine the value of n in the degree of association and dissociation formula ?

Write a short note on Natural dyes.

Select the options which describe the characteristics of diamonds.

A student measured the pH values of four solutions marked A, B, C and D and found them to be 6, 12, 2 and 14 respectively. The solution which is likely to be strongly acidic is :(1) A(2) B(3) C(4) D

46.Difference between enantiomer and identical molecules.

The figure given shows the transfer of energy in an ecosystem. In the given food chain, 10,000 J of energy is available with producers. Calculate and find the amount of energy received from producers to top carnivores.

A compound `X` has molecular formula C4H10. It undergoes substitution reaction readily than addition reaction. It burns with blue flame and is present in LPG. Identify `X'.

A student dipped a pH paper in an unknown liquid. Orange colour was obtained. The unknown solution can be:

Which contains greater no. of oxygen atoms and why a. 1 gm O b. 1 gm O2 c. 1 gm O3 d. all have same

Copper matte produced during the extraction of copper contains

8.Standard vaporization of enthalpy of benzene at boiling point is 30.8kj/mol. For how long would 100 W electric heater have to operate in order to vaporise 100g benzene at that temperature?

The number of unpaired electrons in a paramagnetic diatomic molecule of an element withatomic number 16 is

Galvanization is applying a coating of:

Which of the following gas causes a hole in the ozone layer?

Why does pure nitric acid take on a yellowish brown colour when exposed to light?

State what you see, when silver nitrate solution is added to dilute HCl.

Consider the compound P(C4H9Cl).How many isomers will give 2-methylpropene after elimination?

What is the trend of acidic strength of acids H2PO3, H3PO3 and H3PO4 and why?

(a) On which side of the periodic table will you find metals? (b) On which side of the periodic table will you find non-metals? (c) What is the name of those elements which divide metals and non-metals in the periodic table?

Ashwini has been given four test-tubes containing the following:(a) Universal indicator(b) Distilled water(c) Sodium hydrogencarbonate(d) Phenolphthalein​What will be observed by Ashwini when he adds a few drops of acetic acid to each test-tube, one by one?

Give the name and structural formula of next homologue of HCOOH.

6g of Ethane C2H6 is burnt in excess of o2 .The moles of H2o formed would be

What is the IUPAC of isooctane

Discuss the physical properties of carbon.

How does graphite conduct electricity?

The structure given below shows the isomeric form of

Electrolytic reduction of alumina to aluminium by Hall-Heroult process is carried out:

In water or in aqueous solution of HCl or H2SO4 proton exists as(1) H30^{+ }(2) H(H20)_4^+(3) H(H2O)_n^{}(4) All of these

Define ecosystem.

Which of the following methods are employed in the extraction of Sn from Cassiterite?

Which element can be placed in the region marked by question mark ?

Ashwini has been given four test-tubes containing the following:(a) Universal indicator(b) Distilled water(c) Sodium hydrogencarbonate(d) PhenolphthaleinWhat will be observed by Ashwini when he adds a few drops of acetic acid to each test-tube, one by one?