10223 + Interview Questions in Chemistry

1.	40. How many mole of H2O2 is required to produce sufficient oxygen which can be used to completely convert 2L at STP SO2 gas to SO3 gas
Answer» 40. How many mole of H2O2 is required to produce sufficient oxygen which can be used to completely convert 2L at STP SO2 gas to SO3 gas

Discussion

2.	1.if we mix the solutions of lead(2) nitrate and potassium iodide.what will be the precipitate and its colour?
Answer» 1.if we mix the solutions of lead(2) nitrate and potassium iodide.what will be the precipitate and its colour?

Discussion

3.	A dust particle lying at the rim of a wheel has an angular speed of 22rad/s .Find time period.
Answer» A dust particle lying at the rim of a wheel has an angular speed of 22rad/s .Find time period.

Discussion

4.	Which of the following metals can displace the other two metals from their salt solutions? zinc, iron, copper
Answer» Which of the following metals can displace the other two metals from their salt solutions? zinc, iron, copper

Discussion

5.	What is the effect of pressure on solubility of gases? Explain with an example.
Answer» What is the effect of pressure on solubility of gases? Explain with an example.

Discussion

6.	What is meant by atomicity? Explain with two examples.
Answer» What is meant by atomicity? Explain with two examples.

Discussion

7.	Question 1 (b)Convert the following Temperature to Celsius scale:b. 573 K
Answer» Question 1 (b) Convert the following Temperature to Celsius scale: b. 573 K

Discussion

8.	1. What are the things the wind does in the first stanza? 2. Have you seen anybody winnow grain at home or in a paddy field? What is the word in your language for winnowing? What do people use for winnowing? (Give words in your language if you know them.) 3. What does the poet say the wind god winnows? 4. What should we do to make friends with the wind? 5. What do the last four lines of the poem mean to you? 6. How does the poet speak to the wind—in anger or with humour? You must also have seen or heard of the wind “crumbling lives”. What is your response to this? Is it like the poet’s?
Answer» 1. What are the things the wind does in the first stanza? 2. Have you seen anybody winnow grain at home or in a paddy field? What is the word in your language for winnowing? What do people use for winnowing? (Give words in your language if you know them.) 3. What does the poet say the wind god winnows? 4. What should we do to make friends with the wind? 5. What do the last four lines of the poem mean to you? 6. How does the poet speak to the wind—in anger or with humour? You must also have seen or heard of the wind “crumbling lives”. What is your response to this? Is it like the poet’s?

8.

1. What are the things the wind does in the first stanza? 2. Have you seen anybody winnow grain at home or in a paddy field? What is the word in your language for winnowing? What do people use for winnowing? (Give words in your language if you know them.) 3. What does the poet say the wind god winnows? 4. What should we do to make friends with the wind? 5. What do the last four lines of the poem mean to you? 6. How does the poet speak to the wind—in anger or with humour? You must also have seen or heard of the wind “crumbling lives”. What is your response to this? Is it like the poet’s?

Answer»

1. What are the things the wind does in the first stanza?

2. Have you seen anybody winnow grain at home or in a paddy field? What is the word in your language for winnowing? What do people use for winnowing? (Give words in your language if you know them.)

3. What does the poet say the wind god winnows?

4. What should we do to make friends with the wind?

5. What do the last four lines of the poem mean to you?

6. How does the poet speak to the wind—in anger or with humour? You must also have seen or heard of the wind “crumbling lives”. What is your response to this? Is it like the poet’s?

Discussion

9.	What will be the action of the following substances on red and blue litmus paper? Dry HCl gas Moistened NH3 gas Lemon juice Carbonated soft drink Curd Soap solution.
Answer» What will be the action of the following substances on red and blue litmus paper? Dry HCl gas Moistened ${NH}_{3}$ gas Lemon juice Carbonated soft drink Curd Soap solution.

Discussion

10.	A monoatomic gas is going under adiabatic process.Adibiatic elasticity at pressure P=10^3 N/m^2 is K times 10^3 N/m^2 then the value of k ?
Answer» A monoatomic gas is going under adiabatic process.Adibiatic elasticity at pressure P=10^3 N/m^2 is K times 10^3 N/m^2 then the value of k ?

Discussion

11.	Write a method for preparation of hydrogen gas by displacement reaction.
Answer» Write a method for preparation of hydrogen gas by displacement reaction.

Discussion

12.	4) 1.0x 10 58 The mass of carbon anode consumed (giving only carbon dioxide) in the production of 270 kg of aluminium metal from bauxite by the Hall process is (Atomic Mass: Al 27) + be (1) 270 kg (3) 90 kg (2) 540 kg 3 (4) 180 kg ma
Answer» 4) 1.0x 10 58 The mass of carbon anode consumed (giving only carbon dioxide) in the production of 270 kg of aluminium metal from bauxite by the Hall process is (Atomic Mass: Al 27) + be (1) 270 kg (3) 90 kg (2) 540 kg 3 (4) 180 kg ma

Discussion

13.	The chemical formula of sulphide of an element ‘X’ having valency 3 is
Answer» The chemical formula of sulphide of an element ‘X’ having valency 3 is

Discussion

14.	The tendency towards complex formation is maximum in
Answer» The tendency towards complex formation is maximum in

Discussion

15.	The chlorine atom attracts the bonded pair of electrons in hydrogen chloride. The ability of chlorine to do so can be named as:
Answer» The chlorine atom attracts the bonded pair of electrons in hydrogen chloride. The ability of chlorine to do so can be named as:

Discussion

16.	Question 21Will 35Cl and 37Cl have different valencies? Justify your answer.
Answer» Question 21 Will $_{35} C l$ and $_{37} C l$ have different valencies? Justify your answer.

Discussion

17.	Question 15 The electron distribution of an aluminium atom is (a) 2, 8, 3 (b) 2, 8, 2 (c) 8, 2, 3 (d) 2, 3, 8
Answer» Question 15 The electron distribution of an aluminium atom is (a) 2, 8, 3 (b) 2, 8, 2 (c) 8, 2, 3 (d) 2, 3, 8

Discussion

18.	Zn+Hcl-ZnCl2+H2 1. how many molecules of hydrogen are produced from the reaction of three moles of zinc with an excess of hydrochloric acid? 2. What would be the volume of the same number of carbon dioxide molecules at stp 3. State the law used to answer the above question.
Answer» Zn+Hcl-ZnCl2+H2 1. how many molecules of hydrogen are produced from the reaction of three moles of zinc with an excess of hydrochloric acid? 2. What would be the volume of the same number of carbon dioxide molecules at stp 3. State the law used to answer the above question.

Discussion

19.	The isotopes of an element X are zXA, zXA+1, zXA+2 respectively. What is the ratio of the number of nucleons in these respective isotopes?
Answer» The isotopes of an element X are $_{z} X^{A},_{z} X^{A + 1},_{z} X^{A + 2}$ respectively. What is the ratio of the number of nucleons in these respective isotopes?

Discussion

20.	How to find oxidation state for radical and ion? Explain separately.
Answer» How to find oxidation state for radical and ion? Explain separately.

Discussion

21.	Question 2 (i) Write down the names of compounds represented by the following formulae: (i) Al2(SO4)3
Answer» Question 2 (i) Write down the names of compounds represented by the following formulae: $(i) A l_{2} (S O_{4})_{3}$

Discussion

22.	Question 2 Table Name of the elementSymbolNumber of protonsNumber of neutronsNumber of electronsOxygenO888SulphurS161616 With the help of table, find out the mass number of oxygen and sulphur atom.
Answer» Question 2 Table $\begin{matrix} Name of the element & Symbol & Number of protons & Number of neutrons & Number of electrons Oxygen & O & 8 & 8 & 8 Sulphur & S & 16 & 16 & 16 \end{matrix}$ With the help of table, find out the mass number of oxygen and sulphur atom.

Discussion

23.	Order of proton accepting tendency among HS,I RNH2 ,NH3
Answer» Order of proton accepting tendency among HS,I RNH2 ,NH3

Discussion

24.	23 An ideal monatomic gas undergoes a processfoliow the relation P oc V. The molar heat capacityof the gas is28.R(1)2(2) R$2(3) 2R(4) R3C
Answer» 23 An ideal monatomic gas undergoes a processfoliow the relation P oc V. The molar heat capacityof the gas is28.R(1)2(2) R$2(3) 2R(4) R3C

Discussion

25.	Q) 5g of water at 30c and 5g of ice at -20c are mixed together in a calorimeter. Find the final temperature of the mixture
Answer» Q) 5g of water at 30c and 5g of ice at -20c are mixed together in a calorimeter. Find the final temperature of the mixture

Discussion

26.	State the principle on which the cleansing action of soap is based. [3 MARKS]
Answer» State the principle on which the cleansing action of soap is based. [3 MARKS]

Discussion

27.	5. 20 ml of mixture of CO2 and CO are treated with x ml of oxygen final volume becomes (16+x)ml. 30 ml of this solution is passed through alkali what will be the volume of mixture.
Answer» 5. 20 ml of mixture of CO2 and CO are treated with x ml of oxygen final volume becomes (16+x)ml. 30 ml of this solution is passed through alkali what will be the volume of mixture.

Discussion

28.	The number of moles of KMnO4 that will be needed to react completely with one mole of ferrous oxalate in acidic solution is
Answer» The number of moles of $K M n O_{4}$ that will be needed to react completely with one mole of ferrous oxalate in acidic solution is

Discussion

29.	Certain amount of a gas occupies a volume of 0.4 litre at 17∘C . to What temperature should it be heated so that its volume gets (a) doubled (b) reduced to half, pressure remaining c onnstant?
Answer» Certain amount of a gas occupies a volume of 0.4 litre at $17^{\circ} C$ . to What temperature should it be heated so that its volume gets (a) doubled (b) reduced to half, pressure remaining c onnstant?

Discussion

30.	Which method can be used to separate a mixture of sulphur and iron filings
Answer» Which method can be used to separate a mixture of sulphur and iron filings

Discussion

31.	16. A+B+C = product On doubling the volume of container Rate of reaction decreases 8 times. On increasing concentration of A by 2 times and reducing concentration of B by 1/2 times, Rate of reaction increases by 4 times. On increasing concentration of C by 4 times the rate of reaction increases by 64 times. Calculate order?
Answer» 16. A+B+C = product On doubling the volume of container Rate of reaction decreases 8 times. On increasing concentration of A by 2 times and reducing concentration of B by 1/2 times, Rate of reaction increases by 4 times. On increasing concentration of C by 4 times the rate of reaction increases by 64 times. Calculate order?

Discussion

32.	An acidified solution of potassium chromate was layered with an equal volume of amyl alcohol. When it was shaken after the addition of 1 mL of 3% H2O2, a blue alcohol layer was obtained. The blue color is due to the formation of a chromium (VI) compound ‘X’. What is the number of oxygen atoms bonded to chromium through only single bonds in a molecule of X?
Answer» An acidified solution of potassium chromate was layered with an equal volume of amyl alcohol. When it was shaken after the addition of $1 m L$ of $3$ % $H_{2} O_{2}$ , a blue alcohol layer was obtained. The blue color is due to the formation of a chromium (VI) compound ‘X’. What is the number of oxygen atoms bonded to chromium through only single bonds in a molecule of X?

Discussion

33.	a gaseous reaction 2A-->4B+C is carried out in closed vessel the concentration of B is found to increase by 5×10^{-3 }mol per liter in 10 sec so what is rate of appreance of B and rate of disappreance of A\}
Answer» a gaseous reaction 2A-->4B+C is carried out in closed vessel the concentration of B is found to increase by 5×10^{-3 }mol per liter in 10 sec so what is rate of appreance of B and rate of disappreance of A\}

Discussion

34.	Unit of surface area can be
Answer» Unit of surface area can be

Discussion

35.	A student prepared solution of (i) an acid and (ii) a base in two separate beakers. She forgot to label the solutions and litmus paper is not available in the laboratory. Since, both the solutions are colourless, how will she distinguish between the two ?
Answer» A student prepared solution of (i) an acid and (ii) a base in two separate beakers. She forgot to label the solutions and litmus paper is not available in the laboratory. Since, both the solutions are colourless, how will she distinguish between the two ?

Discussion

36.	35.A homogeneous plate PQRST is as shown in figure. The centre of mass of plate lies at midpoint A of segment QT. Then the ratio of a/b is (PQ = PT = b; QR = RS = ST = a.
Answer» 35.A homogeneous plate PQRST is as shown in figure. The centre of mass of plate lies at midpoint A of segment QT. Then the ratio of a/b is (PQ = PT = b; QR = RS = ST = a.

Discussion

37.	41.The pair of element with almost same atomic radii 1.Na ,K 2.Be,Mg 3.Na,Mg 4.Fe,Co
Answer» 41.The pair of element with almost same atomic radii 1.Na ,K 2.Be,Mg 3.Na,Mg 4.Fe,Co

Discussion

38.	Write down the uses of Baking Soda.
Answer» Write down the uses of Baking Soda.

Discussion

39.	what is jhon teller effect ?and its exception
Answer» what is jhon teller effect ?and its exception

Discussion

40.	Unlike graphite diamond doesn't conduct electricity. Why?
Answer» Unlike graphite diamond doesn't conduct electricity. Why?

Discussion

41.	What is the distance between Na+ and Cl– ions in NaCl crystal if its density is 2.165 g cm–3 ? [Atomic Mass of Na = 23u, Cl = 35.5 u; Avogadro’s number = 6.023 × 1023]
Answer» What is the distance between Na+ and Cl– ions in NaCl crystal if its density is 2.165 g cm–3 ? [Atomic Mass of Na = 23u, Cl = 35.5 u; Avogadro’s number = 6.023 × 1023]

Discussion

42.	What is the maximum number of hydrogen atoms required to attain the octet configuration by the carbon?
Answer» What is the maximum number of hydrogen atoms required to attain the octet configuration by the carbon?

Discussion

43.	Which of these is the correct group reagent for Mn2+,Co2+,Zn2+& Ni2+ group cations?
Answer» Which of these is the correct group reagent for $M n^{2 +}, C o^{2 +}, Z n^{2 +} & N i^{2 +}$ group cations?

Discussion

44.	What are lone pairs? Give some examples depicting lone pairs.
Answer» What are lone pairs? Give some examples depicting lone pairs.

Discussion

45.	What is the difference between degree of ionisation and degree of dissociation. WHAT IS their formulas??
Answer» What is the difference between degree of ionisation and degree of dissociation. WHAT IS their formulas??

Discussion

46.	What is the effect of temperature on the solubility of KNO3 and CaSO4 in water?
Answer» What is the effect of temperature on the solubility of $K N O_{3} a n d C a S O_{4}$ in water?

Discussion

47.	Explain the mechanism of free radical substitution reaction in brief
Answer» Explain the mechanism of free radical substitution reaction in brief

Discussion

48.	निम्नलिखित प्रश्न का उत्तर एक-दो पंक्तियों में दीजिए − उस स्त्री के लड़के की मृत्यु का कारण क्या था?
Answer» निम्नलिखित प्रश्न का उत्तर एक-दो पंक्तियों में दीजिए − उस स्त्री के लड़के की मृत्यु का कारण क्या था?

48.

निम्नलिखित प्रश्न का उत्तर एक-दो पंक्तियों में दीजिए − उस स्त्री के लड़के की मृत्यु का कारण क्या था?

Answer»

निम्नलिखित प्रश्न का उत्तर एक-दो पंक्तियों में दीजिए −

उस स्त्री के लड़के की मृत्यु का कारण क्या था?

Discussion

49.	Lead sulphide reacts with oxygen when heated. What type of reaction is this? What is the color of the products formed?
Answer» Lead sulphide reacts with oxygen when heated. What type of reaction is this? What is the color of the products formed?

49.

Lead sulphide reacts with oxygen when heated. What type of reaction is this? What is the color of the products formed?

Answer»

Lead sulphide reacts with oxygen when heated. What type of reaction is this?

What is the color of the products formed?

Discussion

50.	When a bottle of cold drink is opened, the gas comes out with a fizze due to -
Answer» When a bottle of cold drink is opened, the gas comes out with a fizze due to -

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

40. How many mole of H2O2 is required to produce sufficient oxygen which can be used to completely convert 2L at STP SO2 gas to SO3 gas

1.if we mix the solutions of lead(2) nitrate and potassium iodide.what will be the precipitate and its colour?

A dust particle lying at the rim of a wheel has an angular speed of 22rad/s .Find time period.

Which of the following metals can displace the other two metals from their salt solutions? ​zinc, iron, copper

What is the effect of pressure on solubility of gases? Explain with an example.

What is meant by atomicity? Explain with two examples.

Question 1 (b)Convert the following Temperature to Celsius scale:b. 573 K

What will be the action of the following substances on red and blue litmus paper? Dry HCl gas Moistened NH3 gas Lemon juice Carbonated soft drink Curd Soap solution.

A monoatomic gas is going under adiabatic process.Adibiatic elasticity at pressure P=10^3 N/m^2 is K times 10^3 N/m^2 then the value of k ?

Write a method for preparation of hydrogen gas by displacement reaction.

4) 1.0x 10 58 The mass of carbon anode consumed (giving only carbon dioxide) in the production of 270 kg of aluminium metal from bauxite by the Hall process is (Atomic Mass: Al 27) + be (1) 270 kg (3) 90 kg (2) 540 kg 3 (4) 180 kg ma

The chemical formula of sulphide of an element ‘X’ having valency 3 is

The tendency towards complex formation is maximum in

The chlorine atom attracts the bonded pair of electrons in hydrogen chloride. The ability of chlorine to do so can be named as:

Question 21Will 35Cl and 37Cl have different valencies? Justify your answer.

Question 15 The electron distribution of an aluminium atom is (a) 2, 8, 3 (b) 2, 8, 2 (c) 8, 2, 3 (d) 2, 3, 8

Zn+Hcl-ZnCl2+H2 1. how many molecules of hydrogen are produced from the reaction of three moles of zinc with an excess of hydrochloric acid? 2. What would be the volume of the same number of carbon dioxide molecules at stp 3. State the law used to answer the above question.

The isotopes of an element X are zXA, zXA+1, zXA+2 respectively. What is the ratio of the number of nucleons in these respective isotopes?

How to find oxidation state for radical and ion? Explain separately.

Question 2 (i) Write down the names of compounds represented by the following formulae: (i) Al2(SO4)3

Question 2 Table Name of the elementSymbolNumber of protonsNumber of neutronsNumber of electronsOxygenO888SulphurS161616 With the help of table, find out the mass number of oxygen and sulphur atom.

Order of proton accepting tendency among HS,I RNH2 ,NH3

23 An ideal monatomic gas undergoes a processfoliow the relation P oc V. The molar heat capacityof the gas is28.R(1)2(2) R$2(3) 2R(4) R3C

Q) 5g of water at 30c and 5g of ice at -20c are mixed together in a calorimeter. Find the final temperature of the mixture

State the principle on which the cleansing action of soap is based. [3 MARKS]

5. 20 ml of mixture of CO2 and CO are treated with x ml of oxygen final volume becomes (16+x)ml. 30 ml of this solution is passed through alkali what will be the volume of mixture.

The number of moles of KMnO4 that will be needed to react completely with one mole of ferrous oxalate in acidic solution is

Certain amount of a gas occupies a volume of 0.4 litre at 17∘C . to What temperature should it be heated so that its volume gets (a) doubled (b) reduced to half, pressure remaining c onnstant?

Which method can be used to separate a mixture of sulphur and iron filings

a gaseous reaction 2A-->4B+C is carried out in closed vessel the concentration of B is found to increase by 5×10^{-3 }mol per liter in 10 sec so what is rate of appreance of B and rate of disappreance of A\}

Unit of surface area can be

A student prepared solution of (i) an acid and (ii) a base in two separate beakers. She forgot to label the solutions and litmus paper is not available in the laboratory. Since, both the solutions are colourless, how will she distinguish between the two ?

35.A homogeneous plate PQRST is as shown in figure. The centre of mass of plate lies at midpoint A of segment QT. Then the ratio of a/b is (PQ = PT = b; QR = RS = ST = a.

41.The pair of element with almost same atomic radii 1.Na ,K 2.Be,Mg 3.Na,Mg 4.Fe,Co

Write down the uses of Baking Soda.

what is jhon teller effect ?and its exception

Unlike graphite diamond doesn't conduct electricity. Why?

What is the distance between Na+ and Cl– ions in NaCl crystal if its density is 2.165 g cm–3 ? [Atomic Mass of Na = 23u, Cl = 35.5 u; Avogadro’s number = 6.023 × 1023]

What is the maximum number of hydrogen atoms required to attain the octet configuration by the carbon?

Which of these is the correct group reagent for Mn2+,Co2+,Zn2+&amp; Ni2+ group cations?

What are lone pairs? Give some examples depicting lone pairs.

What is the difference between degree of ionisation and degree of dissociation. WHAT IS their formulas??

What is the effect of temperature on the solubility of KNO3 and CaSO4 in water?

Explain the mechanism of free radical substitution reaction in brief

निम्नलिखित प्रश्न का उत्तर एक-दो पंक्तियों में दीजिए − उस स्त्री के लड़के की मृत्यु का कारण क्या था?

Lead sulphide reacts with oxygen when heated. What type of reaction is this? What is the color of the products formed?

When a bottle of cold drink is opened, the gas comes out with a fizze due to -

Which of the following metals can displace the other two metals from their salt solutions? zinc, iron, copper

Which of these is the correct group reagent for Mn2+,Co2+,Zn2+& Ni2+ group cations?