10223 + Interview Questions in Chemistry Page 29 InterviewSolution

1401.	Give an illustration of a thermal decomposition reaction.
Answer» Give an illustration of a thermal decomposition reaction.

Discussion

1402.	What is ATOMIC VALENCY? And how to find atomic VALENCY on any atom?
Answer» What is ATOMIC VALENCY? And how to find atomic VALENCY on any atom?

Discussion

1403.	.If an electron in a hydrogen atom jumps from the3rd orbit to the 2nd orbit, it emits a photon ofwavelength A. When it jumps from the 4th orbit tothe 3rd orbit, the corresponding wavelength of thephoton will be(1) 16/25λ(2) 9/16λ(3) 20/7λ(4) 20/
Answer» .If an electron in a hydrogen atom jumps from the3rd orbit to the 2nd orbit, it emits a photon ofwavelength A. When it jumps from the 4th orbit tothe 3rd orbit, the corresponding wavelength of thephoton will be(1) 16/25λ(2) 9/16λ(3) 20/7λ(4) 20/

Discussion

1404.	List down a few applications of chromatography.
Answer» List down a few applications of chromatography.

Discussion

1405.	The smelting of iron in a blast furnace involves the following process
Answer» The smelting of iron in a blast furnace involves the following process

Discussion

1406.	Which of the following reactant(s) can be used to prepare sodium oxide?
Answer» Which of the following reactant(s) can be used to prepare sodium oxide?

Discussion

1407.	how to find whether covalent and coordinate bond both are present in the lewis dot structure of compounds?
Answer» how to find whether covalent and coordinate bond both are present in the lewis dot structure of compounds?

Discussion

1408.	2.2M,50 ml H2SO4 solution is diluted by adding 150ml of water.The concentration of H+ in final solution is 1)0.50M 2)0.66M 3)1.0M 4)1.33M
Answer» 2.2M,50 ml H2SO4 solution is diluted by adding 150ml of water.The concentration of H+ in final solution is 1)0.50M 2)0.66M 3)1.0M 4)1.33M

Discussion

1409.	What is the pH of Milk of Lime?
Answer» What is the pH of Milk of Lime?

Discussion

1410.	The ratio of oxygen in Feo and Fe203 is (containing equal amount of iron)
Answer» The ratio of oxygen in Feo and Fe203 is (containing equal amount of iron)

Discussion

1411.	What would be the solubility of silver chloridein 0.1 M NaCl solution. Ksp for AgCl is 1.20 x10-10
Answer» What would be the solubility of silver chloridein 0.1 M NaCl solution. Ksp for AgCl is 1.20 x10-10

Discussion

1412.	66. Calculate the mass of co2 (g) which contain same no. Of oxygen atoms as are present in 112 'll of O2 (g) at stp?
Answer» 66. Calculate the mass of co2 (g) which contain same no. Of oxygen atoms as are present in 112 'll of O2 (g) at stp?

Discussion

1413.	Why do we sweat in humidity?
Answer» Why do we sweat in humidity?

Discussion

1414.	Which of the following metals give hydrogen gas with steam acid and caustic alkalis?
Answer» Which of the following metals give hydrogen gas with steam acid and caustic alkalis?

Discussion

1415.	What is adsorption ?
Answer» What is adsorption ?

Discussion

1416.	Which of the following metal ions is colourless in water?
Answer» Which of the following metal ions is colourless in water?

Discussion

1417.	The discovery of which of the following group of elements gave a death blow to the Newlands law of octaves
Answer» The discovery of which of the following group of elements gave a death blow to the Newlands law of octaves

Discussion

1418.	When we mix oil in a glass of water, it settles on the top of water making a separate layer. Give reason.
Answer» When we mix oil in a glass of water, it settles on the top of water making a separate layer. Give reason.

Discussion

1419.	(a) Why did Mendeleev leave gaps in his periodic table?(b) State any three limitations of Mendeleev's classification.(c) How does electronic configurations of atoms change in a period with increase in atomic number?
Answer» (a) Why did Mendeleev leave gaps in his periodic table? (b) State any three limitations of Mendeleev's classification. (c) How does electronic configurations of atoms change in a period with increase in atomic number?

Discussion

1420.	Write the names from the description.a. The period with electrons in the shells K, L and M.b. The group with valency zero.c. The family of nonmetals having valency one.d. The family of metals having valency one.e. The family of metals having valency two.f. The metalloids in the second and third periods.g. Nonmetals in the third period.h. Two elements having valency 4.
Answer» Write the names from the description. a. The period with electrons in the shells K, L and M. b. The group with valency zero. c. The family of nonmetals having valency one. d. The family of metals having valency one. e. The family of metals having valency two. f. The metalloids in the second and third periods. g. Nonmetals in the third period. h. Two elements having valency 4.

Discussion

1421.	Select the wrong statement. (1) Radioactivity is a statistical process. (2) Radioactivity is a spontaneous process . (3) Radioactivity is a neutral characteristic of few elements. (4) Radioactive elements cannot be produced in the laboratory. What is meant by the term statistical?
Answer» Select the wrong statement. (1) Radioactivity is a statistical process. (2) Radioactivity is a spontaneous process . (3) Radioactivity is a neutral characteristic of few elements. (4) Radioactive elements cannot be produced in the laboratory. What is meant by the term statistical?

Discussion

1422.	39. Bond order in compound PO_4-3 is
Answer» 39. Bond order in compound PO_4-3 is

Discussion

1423.	What is pure substance ?
Answer» What is pure substance ?

Discussion

1424.	30. The density of ice is x gm/cc and that of water is y gm/cc. What is the change in volume in cc. When m gm of ice melt ?
Answer» 30. The density of ice is x gm/cc and that of water is y gm/cc. What is the change in volume in cc. When m gm of ice melt ?

Discussion

1425.	Question 44 (e) Atomic number of a few elements are given below 10, 20, 7, 14. Determine the valency of these elements.
Answer» Question 44 (e) Atomic number of a few elements are given below 10, 20, 7, 14. Determine the valency of these elements.

Discussion

1426.	.............. hydrocarbons undergo addition reaction
Answer» .............. hydrocarbons undergo addition reaction

Discussion

1427.	A monochromatic neon lamp with wavelength of 670.5 nm illuminates a photo-sensitive material which has a stopping voltage of 0.48 V. What will be the stopping voltage if the source light is changed with another source of wavelength of 474.6 nm?
Answer» A monochromatic neon lamp with wavelength of $670.5 nm$ illuminates a photo-sensitive material which has a stopping voltage of $0.48 V$ . What will be the stopping voltage if the source light is changed with another source of wavelength of $474.6 nm$ ?

Discussion

1428.	State the two laws of chemical combination.
Answer» State the two laws of chemical combination.

Discussion

1429.	Write the chemical formula of the simplest hydrocarbon.
Answer» Write the chemical formula of the simplest hydrocarbon.

Discussion

1430.	Boiling point of water is:
Answer» Boiling point of water is:

Discussion

1431.	Which method of separation is best for investigating the composition of food dyes in sweets?
Answer» Which method of separation is best for investigating the composition of food dyes in sweets?

Discussion

1432.	What is the mass of 18.066 × 1023 molecules of carbon dioxide? __
Answer» What is the mass of 18.066 × $10^{23}$ molecules of carbon dioxide? __

Discussion

1433.	The density of a gas at S.T.P. is 1.40 grams per litre. The molecular weight of the gas is
Answer» The density of a gas at S.T.P. is $1.40 g r a m s$ per litre. The molecular weight of the gas is

Discussion

1434.	Initially 2 moles PCl3 and 3 moles of Cl2 gas are taken into reaction in a vessel of capacity 5litre. At Equilibrium 1 mole of PCl3 dissociates. Find Kp and Kc for the reaction
Answer» Initially 2 moles PCl3 and 3 moles of Cl2 gas are taken into reaction in a vessel of capacity 5litre. At Equilibrium 1 mole of PCl3 dissociates. Find Kp and Kc for the reaction

Discussion

1435.	Q.why does neutron gets converted to proton in a nucleus?(weak nuclear reaction)Q.what is meant by the law of celestial and terrestrial given my newton?
Answer» Q.why does neutron gets converted to proton in a nucleus?(weak nuclear reaction) Q.what is meant by the law of celestial and terrestrial given my newton?

Discussion

1436.	Formula,valency factor and equivalent weight of ferrous ammonium sulphate
Answer» Formula,valency factor and equivalent weight of ferrous ammonium sulphate

Discussion

1437.	18. What is the oxidation number of sulphur in H2S2O3 and H2S2O7 and H2S2O8 and H2S2K6
Answer» 18. What is the oxidation number of sulphur in H2S2O3 and H2S2O7 and H2S2O8 and H2S2K6

Discussion

1438.	Most paints are:
Answer» Most paints are:

Discussion

1439.	What is domain and range
Answer» What is domain and range

Discussion

1440.	In a Dobereiner’s triad, the respective atomic masses of the first and the last elements are 40 and 137 What is the mass of the middle element of the triad?
Answer» In a Dobereiner’s triad, the respective atomic masses of the first and the last elements are 40 and 137 What is the mass of the middle element of the triad?

1440.

In a Dobereiner’s triad, the respective atomic masses of the first and the last elements are 40 and 137 What is the mass of the middle element of the triad?

Answer»

In a Dobereiner’s triad, the respective atomic masses of the first and the last elements are 40 and 137

What is the mass of the middle element of the triad?

Discussion

1441.	Electronic configuration of: Element X: 2,8,2 Element Y: 2,8,4 Element Z: 2,8,7 Which among the given element can be beaten into sheets easily?
Answer» Electronic configuration of: Element X: 2,8,2 Element Y: 2,8,4 Element Z: 2,8,7 Which among the given element can be beaten into sheets easily?

Discussion

1442.	53. 2.5 faraday of electricity is passed through a solution of CuSO4.The number of gram equivalents of copper deposited on the cathode will be?
Answer» 53. 2.5 faraday of electricity is passed through a solution of CuSO4.The number of gram equivalents of copper deposited on the cathode will be?

Discussion

1443.	Question 19.Which of the following is acidic in nature?(a) Lime juice(b) Human blood(c) Lime water(d) Antacid
Answer» Question 19. Which of the following is acidic in nature? (a) Lime juice (b) Human blood (c) Lime water (d) Antacid

Discussion

1444.	Hydrogen is not obtained when sodium reacts with molten NaCl. Why
Answer» Hydrogen is not obtained when sodium reacts with molten NaCl. Why

Discussion

1445.

Copy and complete the following table relating to important industrial processes. Output refers to the product of the process not the intermediate steps. Name of Process Inputs Catalyst Equation for catalysed reaction Output Haber Process Hydrogen + Ammonia + air Nitric acid

Answer» Copy and complete the following table relating to important industrial processes. Output refers to the product of the process not the intermediate steps.

Name of Process	Inputs	Catalyst	Equation for catalysed reaction	Output
Haber Process	Hydrogen +
	Ammonia + air			Nitric acid

Discussion

1446.	correct order of melting point of hydrides of group 15
Answer» correct order of melting point of hydrides of group 15

Discussion

1447.	In which of the following lanthanides oxidation state +2 is most stable ?
Answer» In which of the following lanthanides oxidation state $+ 2$ is most stable ?

Discussion

1448.	what is the difference between shape and geometry of a molecule?
Answer» what is the difference between shape and geometry of a molecule?

Discussion

1449.	Which among the given non-metallic oxide reacts with water to form an acid present in batteries?
Answer» Which among the given non-metallic oxide reacts with water to form an acid present in batteries?

Discussion

1450.	51. Arrange them according to the increasing solubility order of given solute in water ( at same temperature ) He, N2,O2 ,CO2 with reason
Answer» 51. Arrange them according to the increasing solubility order of given solute in water ( at same temperature ) He, N2,O2 ,CO2 with reason

Discussion

Explore topic-wise InterviewSolutions in .

Give an illustration of a thermal decomposition reaction.

What is ATOMIC VALENCY? And how to find atomic VALENCY on any atom?

.If an electron in a hydrogen atom jumps from the3rd orbit to the 2nd orbit, it emits a photon ofwavelength A. When it jumps from the 4th orbit tothe 3rd orbit, the corresponding wavelength of thephoton will be(1) 16/25λ(2) 9/16λ(3) 20/7λ(4) 20/

List down a few applications of chromatography.

The smelting of iron in a blast furnace involves the following process

Which of the following reactant(s) can be used to prepare sodium oxide?

how to find whether covalent and coordinate bond both are present in the lewis dot structure of compounds?

2.2M,50 ml H2SO4 solution is diluted by adding 150ml of water.The concentration of H+ in final solution is 1)0.50M 2)0.66M 3)1.0M 4)1.33M

What is the pH of Milk of Lime?

The ratio of oxygen in Feo and Fe203 is (containing equal amount of iron)

What would be the solubility of silver chloridein 0.1 M NaCl solution. Ksp for AgCl is 1.20 x10-10

66. Calculate the mass of co2 (g) which contain same no. Of oxygen atoms as are present in 112 'll of O2 (g) at stp?

Why do we sweat in humidity?

Which of the following metals give hydrogen gas with steam acid and caustic alkalis?

What is adsorption ?

Which of the following metal ions is colourless in water?

The discovery of which of the following group of elements gave a death blow to the Newlands law of octaves

When we mix oil in a glass of water, it settles on the top of water making a separate layer. Give reason.

(a) Why did Mendeleev leave gaps in his periodic table?(b) State any three limitations of Mendeleev's classification.​(c) How does electronic configurations of atoms change in a period with increase in atomic number?

Select the wrong statement. (1) Radioactivity is a statistical process. (2) Radioactivity is a spontaneous process . (3) Radioactivity is a neutral characteristic of few elements. (4) Radioactive elements cannot be produced in the laboratory. What is meant by the term statistical?

39. Bond order in compound PO_4-3 is

What is pure substance ?

30. The density of ice is x gm/cc and that of water is y gm/cc. What is the change in volume in cc. When m gm of ice melt ?

Question 44 (e) Atomic number of a few elements are given below 10, 20, 7, 14. Determine the valency of these elements.

.............. hydrocarbons undergo addition reaction

A monochromatic neon lamp with wavelength of 670.5 nm illuminates a photo-sensitive material which has a stopping voltage of 0.48 V. What will be the stopping voltage if the source light is changed with another source of wavelength of 474.6 nm?

State the two laws of chemical combination.

Write the chemical formula of the simplest hydrocarbon.

Boiling point of water is:

Which method of separation is best for investigating the composition of food dyes in sweets?

What is the mass of 18.066 × 1023 molecules of carbon dioxide? __

The density of a gas at S.T.P. is 1.40 grams per litre. The molecular weight of the gas is

Initially 2 moles PCl3 and 3 moles of Cl2 gas are taken into reaction in a vessel of capacity 5litre. At Equilibrium 1 mole of PCl3 dissociates. Find Kp and Kc for the reaction

Q.why does neutron gets converted to proton in a nucleus?(weak nuclear reaction)Q.what is meant by the law of celestial and terrestrial given my newton?

Formula,valency factor and equivalent weight of ferrous ammonium sulphate

18. What is the oxidation number of sulphur in H2S2O3 and H2S2O7 and H2S2O8 and H2S2K6

Most paints are:

What is domain and range

In a Dobereiner’s triad, the respective atomic masses of the first and the last elements are 40 and 137 What is the mass of the middle element of the triad?

Electronic configuration of: Element X: 2,8,2 Element Y: 2,8,4 Element Z: 2,8,7 Which among the given element can be beaten into sheets easily?

53. 2.5 faraday of electricity is passed through a solution of CuSO4.The number of gram equivalents of copper deposited on the cathode will be?

Question 19.Which of the following is acidic in nature?(a) Lime juice(b) Human blood(c) Lime water(d) Antacid

Hydrogen is not obtained when sodium reacts with molten NaCl. Why

Copy and complete the following table relating to important industrial processes. Output refers to the product of the process not the intermediate steps. Name of Process Inputs Catalyst Equation for catalysed reaction Output Haber Process Hydrogen + Ammonia + air Nitric acid

correct order of melting point of hydrides of group 15

In which of the following lanthanides oxidation state +2 is most stable ?

what is the difference between shape and geometry of a molecule?

Which among the given non-metallic oxide reacts with water to form an acid present in batteries?

51. Arrange them according to the increasing solubility order of given solute in water ( at same temperature ) He, N2,O2 ,CO2 with reason

(a) Why did Mendeleev leave gaps in his periodic table?(b) State any three limitations of Mendeleev's classification.(c) How does electronic configurations of atoms change in a period with increase in atomic number?