10223 + Interview Questions in Chemistry Page 26 InterviewSolution

1251.	In an experiment, the following reaction takes place. C(s)+O2(g)→CO2(g)12 g 32 g 44 g How much mass of carbon dioxide will be produced, when 12 g of carbon reacts with 48 g of oxygen?
Answer» In an experiment, the following reaction takes place. $C (s) + O_{2} (g) \to {CO}_{2} (g) 12 g 32 g 44 g$ How much mass of carbon dioxide will be produced, when 12 g of carbon reacts with 48 g of oxygen?

Discussion

1252.	Who coined the term "radioactivity"?
Answer» Who coined the term "radioactivity"?

Discussion

1253.	Law of definite proportion
Answer» Law of definite proportion

Discussion

1254.	19. A compound contains 8%sulphur . The minimum molecular weight of the compound is
Answer» 19. A compound contains 8%sulphur . The minimum molecular weight of the compound is

Discussion

1255.	Is the following symbol of element incorrect? Give the correct symbol.(i) Cobalt CO(ii) Carbon c(iii) Aluminum AL(iv) Helium He(v) Sodium So
Answer» Is the following symbol of element incorrect? Give the correct symbol. (i) Cobalt CO (ii) Carbon c (iii) Aluminum AL (iv) Helium He (v) Sodium So

Discussion

1256.	ntQ. In Bhor series of lines of hydrogen spectrum, the third line from the red end corresponds to which one of the following inter -orbit jumps of the electron for Bhor orbits in an atom of hydrogen?n nt1) 3 to 1n nt2) 5 to 2n nt3) 2 to 5n nt4) 3 to 2n
Answer» ntQ. In Bhor series of lines of hydrogen spectrum, the third line from the red end corresponds to which one of the following inter -orbit jumps of the electron for Bhor orbits in an atom of hydrogen?n nt1) 3 to 1n nt2) 5 to 2n nt3) 2 to 5n nt4) 3 to 2n

Discussion

1257.	41. Why 0.1M trifluoro acetic acid is more acidic than 0.1M acetic acid?
Answer» 41. Why 0.1M trifluoro acetic acid is more acidic than 0.1M acetic acid?

Discussion

1258.	(a) What are radioactive isotopes? Give two examples of radioactive isotopes.(b) Give any two uses of radioactive isotopes.
Answer» (a) What are radioactive isotopes? Give two examples of radioactive isotopes. (b) Give any two uses of radioactive isotopes.

Discussion

1259.	1. Reactionvof pent 2 ene with h2so4 /hgso4 yields
Answer» 1. Reactionvof pent 2 ene with h2so4 /hgso4 yields

Discussion

1260.	Count the number of hydrogen atoms in
Answer» Count the number of hydrogen atoms in

Discussion

1261.	What is Graham's law of diffusion
Answer» What is Graham's law of diffusion

Discussion

1262.	Describe the process of neutralisation with the help of an example.
Answer» Describe the process of neutralisation with the help of an example.

Discussion

1263.	what is meant by dye
Answer» what is meant by dye

Discussion

1264.	0. Consider the given reaction,2C(g) at a given temperature.If a mixture of 2 mol each of A, B and C exist atequilibrium and K 9, then volume of the flask3A(g) + B(g)will be79 (2)(4) 36 L(1) 3 L76 (E)
Answer» 0. Consider the given reaction,2C(g) at a given temperature.If a mixture of 2 mol each of A, B and C exist atequilibrium and K 9, then volume of the flask3A(g) + B(g)will be79 (2)(4) 36 L(1) 3 L76 (E)

Discussion

1265.	what is ideal gas?
Answer» what is ideal gas?

Discussion

1266.	How many nuetrons are contained in 2 kg? Mass of one nuetron is 1.67 x 10^-27. How many elecron would balance one proton? How many electron should be added to make it heavier by 5 nanometer?
Answer» How many nuetrons are contained in 2 kg? Mass of one nuetron is 1.67 x 10^-27. How many elecron would balance one proton? How many electron should be added to make it heavier by 5 nanometer?

Discussion

1267.	A definite amount of a gaseous hydrocarbon having less than 5 carbon atoms was burned with sufficient amount of O2 at a very high temperature. The volume of all reactants was 600 ml, after the explosion the volume of the products was found to be 700 ml under the similar conditions. What is the molecular formula of compound?
Answer» A definite amount of a gaseous hydrocarbon having less than 5 carbon atoms was burned with sufficient amount of $O_{2}$ at a very high temperature. The volume of all reactants was 600 ml, after the explosion the volume of the products was found to be 700 ml under the similar conditions. What is the molecular formula of compound?

Discussion

1268.	What is the composition of air?
Answer» What is the composition of air?

Discussion

1269.	Define Brownian movement in colloids. What is the reason for it? [2 MARKS]
Answer» Define Brownian movement in colloids. What is the reason for it? [2 MARKS]

Discussion

1270.	212 explain the value of Cp,Cv and gama for mono,di, tri atomic gas
Answer» 212 explain the value of Cp,Cv and gama for mono,di, tri atomic gas

Discussion

1271.

The position of three elements A, B and C in the Periodic Table are shown below − Group 16 Group 17 − − − A − − B C (a) State whether A is a metal or non-metal.(b) State whether C is more reactive or less reactive than A.(c) Will C be larger or smaller in size than B?(d) Which type of ion, cation or anion, will be formed by element A?

Answer»

The position of three elements A, B and C in the Periodic Table are shown below −

Group 16	Group 17
−	−
−	A
−	−
B	C

(a) State whether A is a metal or non-metal.

(b) State whether C is more reactive or less reactive than A.

(c) Will C be larger or smaller in size than B?

(d) Which type of ion, cation or anion, will be formed by element A?

Discussion

1272.	24.Find tension in the sting in between the blocks. The string is ideal and floor is smooth.
Answer» 24.Find tension in the sting in between the blocks. The string is ideal and floor is smooth.

Discussion

1273.	In a biogas plant, methane gas (CH4) is produced as a fuel. Find the mass ratio of carbon to hydrogen in methane.
Answer» In a biogas plant, methane gas ( $C H_{4}$ ) is produced as a fuel. Find the mass ratio of carbon to hydrogen in methane.

Discussion

1274.	The equivalent mass of a certain bivalent metal is 25 g. The gram molar mass of its anhydrous chloride is:
Answer» The equivalent mass of a certain bivalent metal is $25 g$ . The gram molar mass of its anhydrous chloride is:

Discussion

1275.	Which one of the following scrap metals cannot be separated by magnetic separation?
Answer» Which one of the following scrap metals cannot be separated by magnetic separation?

Discussion

1276.	Which of the following colloids cannot be easily coagulated?
Answer» Which of the following colloids cannot be easily coagulated?

Discussion

1277.	Question 3 (a) Give reason for the following observations. a. Naphthalene balls disappear with time without leaving any solid.
Answer» Question 3 (a) Give reason for the following observations. a. Naphthalene balls disappear with time without leaving any solid.

Discussion

1278.	Question 14While diluting a solution of salt in water, a student by mistake added acetone (boiling point 56∘C). What technique can be employed to get back the acetone?Justify your choice.
Answer» Question 14 While diluting a solution of salt in water, a student by mistake added acetone (boiling point 56 $^{\circ}$ C). What technique can be employed to get back the acetone? Justify your choice.

Discussion

1279.	One Nanometre is-
Answer» One Nanometre is-

Discussion

1280.	CH4 and C2H6 form a homologous series, they differ by:
Answer» $C H_{4} a n d C_{2} H_{6}$ form a homologous series, they differ by:

Discussion

1281.	What is a heterogeneous mixture?
Answer» What is a heterogeneous mixture?

Discussion

1282.	Explain the manufacturing of ceramic articles.
Answer» Explain the manufacturing of ceramic articles.

Discussion

1283.	Which of the following metals does not produce bubbles when they interact with hydrochloric acid ?
Answer» Which of the following metals does not produce bubbles when they interact with hydrochloric acid ?

Discussion

1284.	What is synthesis reaction? What kind of chemical reaction is synthesis? Support your answer by an example.
Answer» What is synthesis reaction? What kind of chemical reaction is synthesis? Support your answer by an example.

Discussion

1285.	3mL of a strong acid solution of pH=3 is mixed with 2mL of strong base solution of pH=11.What is the pH of new solution? \lbrack Log(2)=0.301, \log(5)=0.699\rbrack.
Answer» 3mL of a strong acid solution of pH=3 is mixed with 2mL of strong base solution of pH=11.What is the pH of new solution? \lbrack Log(2)=0.301, \log(5)=0.699\rbrack.

Discussion

1286.	tea is homogeneous or hetrogeneous ??
Answer» tea is homogeneous or hetrogeneous ??

Discussion

1287.	Pick the incorrect pair.
Answer» Pick the incorrect pair.

Discussion

1288.	Which of the following is formed by condensation polymerisation?
Answer» Which of the following is formed by condensation polymerisation?

Discussion

1289.	29. Write balanced chemical equations with the physical states of reactants and products for tarnishing of silver and rusting of iron
Answer» 29. Write balanced chemical equations with the physical states of reactants and products for tarnishing of silver and rusting of iron

Discussion

1290.	Explain why, steam at 100∘ is better for heating purposes than boiling water at 100∘C.
Answer» Explain why, steam at $100^{\circ}$ is better for heating purposes than boiling water at $100^{\circ}$ C.

Discussion

1291.	41. Sulphur reacts with chlorine in 1:2 ratio to give compound X. Hydrolysis of X gives Y which is a sulphur containing compound. Hybridisation of central atom in anion of Y will be??
Answer» 41. Sulphur reacts with chlorine in 1:2 ratio to give compound X. Hydrolysis of X gives Y which is a sulphur containing compound. Hybridisation of central atom in anion of Y will be??

Discussion

1292.	if oxidation state of A is +2 of B is +3 And of c its _2 then whatis possible formula for compound 1\}A3(B2C)2 2\}A2(BC)2 3\} B3(AC3)2 4\} A3(BC3)
Answer» if oxidation state of A is +2 of B is +3 And of c its _2 then whatis possible formula for compound 1\}A3(B2C)2 2\}A2(BC)2 3\} B3(AC3)2 4\} A3(BC3)

Discussion

1293.	22.When a piece of a ice floating in liquid of density d, melts completely, then prove that the level of (liquid + water) rises, if d > density of water. Click h
Answer» 22.When a piece of a ice floating in liquid of density d, melts completely, then prove that the level of (liquid + water) rises, if d > density of water. Click h

Discussion

1294.	46.Formal charge on oxygen atom in ozone
Answer» 46.Formal charge on oxygen atom in ozone

Discussion

1295.	How many molecules are present in 252g of HNO3 . (Molecular Mass of HNO3 =63).
Answer» How many molecules are present in 252g of HNO_{3 .} (Molecular Mass of HNO₃=63).

1295.

How many molecules are present in 252g of HNO3 . (Molecular Mass of HNO3 =63).

Answer»

How many molecules are present in 252g of HNO_{3 .}

(Molecular Mass of HNO₃=63).

Discussion

1296.	10 ml of 0.1 M H2SO4 is needed for complete reaction with 25 ml of 11.44 g/l of Na2CO3.xH2O. The value of X is
Answer» 10 ml of 0.1 M H2SO4 is needed for complete reaction with 25 ml of 11.44 g/l of Na2CO3.xH2O. The value of X is

Discussion

1297.	Which one of the following laboratory apparatus is not used in the process of evaporation?
Answer» Which one of the following laboratory apparatus is not used in the process of evaporation?

Discussion

1298.	(NH4)+, (SO4)2− are examples of _________________.
Answer» $({N H}_{4})^{+}$ , $({S O}_{4})^{2 -}$ are examples of _________________.

Discussion

1299.	Explain how coal is a storehouse of carbon.
Answer» Explain how coal is a storehouse of carbon.

Discussion

1300.	42. How to find oxidation state of central atom maximum oxidation state. A.Cl2O7 B.Cl2O7 C.HClO2 D.ClO2
Answer» 42. How to find oxidation state of central atom maximum oxidation state. A.Cl2O7 B.Cl2O7 C.HClO2 D.ClO2

Discussion

Explore topic-wise InterviewSolutions in .

In an experiment, the following reaction takes place. C(s)+O2(g)→CO2(g)12 g 32 g 44 g How much mass of carbon dioxide will be produced, when 12 g of carbon reacts with 48 g of oxygen?

Who coined the term "radioactivity"?

Law of definite proportion

19. A compound contains 8%sulphur . The minimum molecular weight of the compound is

Is the following symbol of element incorrect? ​Give the correct symbol.​(i) Cobalt CO​(ii) Carbon c(iii) Aluminum AL(iv) Helium He(v) Sodium So

ntQ. In Bhor series of lines of hydrogen spectrum, the third line from the red end corresponds to which one of the following inter -orbit jumps of the electron for Bhor orbits in an atom of hydrogen?n nt1) 3 to 1n nt2) 5 to 2n nt3) 2 to 5n nt4) 3 to 2n

41. Why 0.1M trifluoro acetic acid is more acidic than 0.1M acetic acid?

(a) What are radioactive isotopes? Give two examples of radioactive isotopes.(b) Give any two uses of radioactive isotopes.

1. Reactionvof pent 2 ene with h2so4 /hgso4 yields

Count the number of hydrogen atoms in

What is Graham's law of diffusion

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

what is meant by dye

0. Consider the given reaction,2C(g) at a given temperature.If a mixture of 2 mol each of A, B and C exist atequilibrium and K 9, then volume of the flask3A(g) + B(g)will be79 (2)(4) 36 L(1) 3 L76 (E)

what is ideal gas?

How many nuetrons are contained in 2 kg? Mass of one nuetron is 1.67 x 10^-27. How many elecron would balance one proton? How many electron should be added to make it heavier by 5 nanometer?

What is the composition of air?

Define Brownian movement in colloids. What is the reason for it? [2 MARKS]

212 explain the value of Cp,Cv and gama for mono,di, tri atomic gas

24.Find tension in the sting in between the blocks. The string is ideal and floor is smooth.

In a biogas plant, methane gas (CH4) is produced as a fuel. Find the mass ratio of carbon to hydrogen in methane.

The equivalent mass of a certain bivalent metal is 25 g. The gram molar mass of its anhydrous chloride is:

Which one of the following scrap metals cannot be separated by magnetic separation?

Which of the following colloids cannot be easily coagulated?

Question 3 (a) Give reason for the following observations. a. Naphthalene balls disappear with time without leaving any solid.

Question 14While diluting a solution of salt in water, a student by mistake added acetone (boiling point 56∘C). What technique can be employed to get back the acetone?Justify your choice.

One Nanometre is-

CH4 and C2H6 form a homologous series, they differ by:

What is a heterogeneous mixture?

Explain the manufacturing of ceramic articles.

Which of the following metals does not produce bubbles when they interact with hydrochloric acid ?

What is synthesis reaction? What kind of chemical reaction is synthesis? Support your answer by an example.

3mL of a strong acid solution of pH=3 is mixed with 2mL of strong base solution of pH=11.What is the pH of new solution? \lbrack Log(2)=0.301, \log(5)=0.699\rbrack.

tea is homogeneous or hetrogeneous ??

Pick the incorrect pair.

Which of the following is formed by condensation polymerisation?

29. Write balanced chemical equations with the physical states of reactants and products for tarnishing of silver and rusting of iron

Explain why, steam at 100∘ is better for heating purposes than boiling water at 100∘C.

41. Sulphur reacts with chlorine in 1:2 ratio to give compound X. Hydrolysis of X gives Y which is a sulphur containing compound. Hybridisation of central atom in anion of Y will be??

if oxidation state of A is +2 of B is +3 And of c its _2 then whatis possible formula for compound 1\}A3(B2C)2 2\}A2(BC)2 3\} B3(AC3)2 4\} A3(BC3)

22.When a piece of a ice floating in liquid of density d, melts completely, then prove that the level of (liquid + water) rises, if d > density of water. Click h

46.Formal charge on oxygen atom in ozone

How many molecules are present in 252g of HNO3 . (Molecular Mass of HNO3 =63).

10 ml of 0.1 M H2SO4 is needed for complete reaction with 25 ml of 11.44 g/l of Na2CO3.xH2O. The value of X is

Which one of the following laboratory apparatus is not used in the process of evaporation?

(NH4)+, (SO4)2− are examples of _________________.

Explain how coal is a storehouse of carbon.

42. How to find oxidation state of central atom maximum oxidation state. A.Cl2O7 B.Cl2O7 C.HClO2 D.ClO2

Is the following symbol of element incorrect? Give the correct symbol.(i) Cobalt CO(ii) Carbon c(iii) Aluminum AL(iv) Helium He(v) Sodium So