15280 + Interview Questions in Chemistry Page 138 InterviewSolution

6851.	What volume of oxygen is required to burn completely a mixture of 22.4dm3 of methane and 11.2dm3 of hydrogen into carbon dioxide and steam? CH4+202→CO2+2H2O2H2+O2→2H2O
Answer» What volume of oxygen is required to burn completely a mixture of $22.4 d m^{3}$ of methane and $11.2 d m^{3}$ of hydrogen into carbon dioxide and steam? $C H_{4} + 20_{2} \to C O_{2} + 2 H_{2} O 2 H_{2} + O_{2} \to 2 H_{2} O$

Discussion

6852.	(a) Give the chemical name and formula of 'cryolite'.(b) What is the function of cryolite in the extraction of aluminium, other than acting as a solvent for bauxite?
Answer» (a) Give the chemical name and formula of 'cryolite'. (b) What is the function of cryolite in the extraction of aluminium, other than acting as a solvent for bauxite?

Discussion

6853.	The IUPAC name of isobutane is ___
Answer» The IUPAC name of isobutane is ___

Discussion

6854.	Why ionisation energy of nitrogen is greater than oxygen
Answer» Why ionisation energy of nitrogen is greater than oxygen

Discussion

6855.	Name an indicator which is pink in alkaline solution but turns colourless in acidic solution.
Answer» Name an indicator which is pink in alkaline solution but turns colourless in acidic solution.

Discussion

6856.	write reason for the following (number in parenthesis is atomic number of substance). 1.Lithium (3) and sodium (11) are considered as active metals. 2. fluorine(9) is more active than chlorine(17)
Answer» write reason for the following (number in parenthesis is atomic number of substance). 1.Lithium (3) and sodium (11) are considered as active metals. 2. fluorine(9) is more active than chlorine(17)

6856.

write reason for the following (number in parenthesis is atomic number of substance). 1.Lithium (3) and sodium (11) are considered as active metals. 2. fluorine(9) is more active than chlorine(17)

Answer»

write reason for the following (number in parenthesis is atomic number of substance).

1.Lithium (3) and sodium (11) are considered as active metals.

2. fluorine(9) is more active than chlorine(17)

Discussion

6857.	Copper can form both cu+ and cu2+ ions, but zinc can form only Zn2+ ions. Why?
Answer» Copper can form both cu+ and cu2+ ions, but zinc can form only Zn2+ ions. Why?

Discussion

6858.	State how would you prepare copper (II) oxide from(a) copper nitrate.(b) copper carbonate.(c) copper sulphate.
Answer» State how would you prepare copper (II) oxide from (a) copper nitrate. (b) copper carbonate. (c) copper sulphate.

Discussion

6859.	8 gm sample of KMnO4 is rected in acidic medium with 100ml of 10 valume hydrogen peroxide . the percentage purity of KMnO4
Answer» 8 gm sample of KMnO4 is rected in acidic medium with 100ml of 10 valume hydrogen peroxide . the percentage purity of KMnO4

Discussion

6860.	why carboxylic acids have more boiling point compared aldehyde, ketones and alcohols but lesser than amides?
Answer» why carboxylic acids have more boiling point compared aldehyde, ketones and alcohols but lesser than amides?

Discussion

6861.	Which of the following options correctly represents the oxidation of Ag?
Answer» Which of the following options correctly represents the oxidation of Ag?

Discussion

6862.	carbon combines with hydrogen to form compounds having the following compositions A carbon (%) 75, B carbon(%) 85.7 C carbon(%)92.3 show that the data illustrates the law of multiple proportions
Answer» carbon combines with hydrogen to form compounds having the following compositions A carbon (%) 75, B carbon(%) 85.7 C carbon(%)92.3 show that the data illustrates the law of multiple proportions

Discussion

6863.	44. When an aqueous solution of copper sulphate is electrolysed using copper electrodes the reaction at anode is represented by
Answer» 44. When an aqueous solution of copper sulphate is electrolysed using copper electrodes the reaction at anode is represented by

Discussion

6864.	Determine whether the following reaction is feasible. If yes complete them Al(OH)3+ CuCl2 =
Answer» Determine whether the following reaction is feasible. If yes complete them Al(OH)₃+ CuCl₂ =

6864.

Determine whether the following reaction is feasible. If yes complete them Al(OH)3+ CuCl2 =

Answer»

Determine whether the following reaction is feasible. If yes complete them

Al(OH)₃+ CuCl₂ =

Discussion

6865.	The packing efficiency of the two-dimensional square unit cell shown below is:
Answer» The packing efficiency of the two-dimensional square unit cell shown below is:

6865.

The packing efficiency of the two-dimensional square unit cell shown below is:

Answer»

The packing efficiency of the two-dimensional square unit cell shown below is:

Discussion

6866.	In a reaction at equilibrium 'x' moles of the reac†an t A decomposes to give one molecule each of C and D. If the fraction of A decomposed at equilibrium is independent of initial concentration of A, then the value of 'x' is (1) 1 (2) 3 (3) 2 (4) 4
Answer» In a reaction at equilibrium 'x' moles of the reac†an t A decomposes to give one molecule each of C and D. If the fraction of A decomposed at equilibrium is independent of initial concentration of A, then the value of 'x' is (1) 1 (2) 3 (3) 2 (4) 4

Discussion

6867.	In the above setup, how will you test for the compound X?
Answer» In the above setup, how will you test for the compound X?

6867.

In the above setup, how will you test for the compound X?

Answer»

In the above setup, how will you test for the compound X?

Discussion

6868.	What are the two properties of carbon which lead to the formation of a large number of carbon compounds?
Answer» What are the two properties of carbon which lead to the formation of a large number of carbon compounds?

Discussion

6869.	100. If the periodic table has 10 period then the maximum number of elements in the periodic table will be_
Answer» 100. If the periodic table has 10 period then the maximum number of elements in the periodic table will be_

Discussion

6870.	A piece of granulated zinc was dropped into copper sulphate solution. After some time, the colour of the solution changed from :(1) light green to blue(2) blue to colourless (3) light green to colourless (4) bule to yellow
Answer» A piece of granulated zinc was dropped into copper sulphate solution. After some time, the colour of the solution changed from : (1) light green to blue (2) blue to colourless (3) light green to colourless (4) bule to yellow

Discussion

6871.	Coordinate bonds are also called:
Answer» Coordinate bonds are also called:

Discussion

6872.	37. 3 moles of an ideal gas expands, reversibly and its volume becomes double at 27^° C,then the entropy change will be (1)-22.5J/K (2)22.5J/K (3)17.3J/K (4)-11.5J/K
Answer» 37. 3 moles of an ideal gas expands, reversibly and its volume becomes double at 27^° C,then the entropy change will be (1)-22.5J/K (2)22.5J/K (3)17.3J/K (4)-11.5J/K

Discussion

6873.	If a rough stainless steel spoon is to be electropolished, then the steel spoon is taken as the ___ in the electrolytic bath with copper and lead and a suitable electrolyte.
Answer» If a rough stainless steel spoon is to be electropolished, then the steel spoon is taken as the ___ in the electrolytic bath with copper and lead and a suitable electrolyte.

Discussion

6874.	45. Vapour density of a metal chloride is 77. If its equivalent weight is 3, its atomic weight will be?
Answer» 45. Vapour density of a metal chloride is 77. If its equivalent weight is 3, its atomic weight will be?

Discussion

6875.	What is the general formula of the homologous series of alcohols?
Answer» What is the general formula of the homologous series of alcohols?

Discussion

6876.	The following questions refer to the electrolysis of copper sulphate solution with copper electrodes:(a) Compare the change in mass of the anode.(b) What is seen to happen to the colour of the copper sulphate solution if platinum electrodes are used? Explain this observation.(c) What is the practical application of the electrolysis of copper sulphate solution? Briefly, describe one such application.
Answer» The following questions refer to the electrolysis of copper sulphate solution with copper electrodes: (a) Compare the change in mass of the anode. (b) What is seen to happen to the colour of the copper sulphate solution if platinum electrodes are used? Explain this observation. (c) What is the practical application of the electrolysis of copper sulphate solution? Briefly, describe one such application.

Discussion

6877.	What is the difference between physical properties of alkali and alkaline?
Answer» What is the difference between physical properties of alkali and alkaline?

Discussion

6878.	what is meant by skeletal equation ?why it should be balanced? balance some of the difficult skeletal equation?
Answer» what is meant by skeletal equation ?why it should be balanced? balance some of the difficult skeletal equation?

Discussion

6879.	How can we balance the following. when a strip of copper metal is placed in a solution of silver nitrate, metallic silver is precipitated and a solution containing copper nitrate is formed. Can you explain it with steps Write the reactants and the products in equation form
Answer» How can we balance the following. when a strip of copper metal is placed in a solution of silver nitrate, metallic silver is precipitated and a solution containing copper nitrate is formed. Can you explain it with steps Write the reactants and the products in equation form

6879.

How can we balance the following. when a strip of copper metal is placed in a solution of silver nitrate, metallic silver is precipitated and a solution containing copper nitrate is formed. Can you explain it with steps Write the reactants and the products in equation form

Answer»

How can we balance the following.

when a strip of copper metal is placed in a solution of silver nitrate, metallic silver is precipitated and a solution containing copper nitrate is formed.

Can you explain it with steps

Write the reactants and the products in equation form

Discussion

6880.	Select the correct options for the electrolysis of lead bromide.
Answer» Select the correct options for the electrolysis of lead bromide.

Discussion

6881.	Explain the terms:(i) Electrorefining(ii) Electrometallurgy(iii) Anode mud
Answer» Explain the terms: (i) Electrorefining (ii) Electrometallurgy (iii) Anode mud

Discussion

6882.	An element in H atom in tis ground state absorbs 1.5times as much energy as the minimum required for ionisation of the atom.Thus KE of emitted electron is
Answer» An element in H atom in tis ground state absorbs 1.5times as much energy as the minimum required for ionisation of the atom.Thus KE of emitted electron is

Discussion

6883.	How many neutrons are present in 2 molecules of nitric acid (HNO3)?How many neutrons are present in 2 molecules of nitric acid (HNO3)?How many neutrons are present in 2 molecules of nitric acid (HNO3)?How many neutrons are present in 2 molecules of nitric acid (HNO3)?How many neutrons are present in 2 molecules of nitric acid (HNO3)?How many neutrons are present in 2 molecules of nitric acid (HNO3)?How many neutrons are present in 2 molecules of nitric acid (HNO3)? 62
Answer» How many neutrons are present in 2 molecules of nitric acid (HNO3)?How many neutrons are present in 2 molecules of nitric acid (HNO3)?How many neutrons are present in 2 molecules of nitric acid (HNO3)?How many neutrons are present in 2 molecules of nitric acid (HNO3)?How many neutrons are present in 2 molecules of nitric acid (HNO3)?How many neutrons are present in 2 molecules of nitric acid (HNO3)?How many neutrons are present in 2 molecules of nitric acid (HNO3)? 62

Discussion

6884.	A10 per of aqueous solution contain 5 g of salt in it calculate the amount of water that should evaporate to make its concentration 15 percentage
Answer» A10 per of aqueous solution contain 5 g of salt in it calculate the amount of water that should evaporate to make its concentration 15 percentage

Discussion

6885.	Question 31Raunak took 5 moles of carbon atoms in a container and Krish also took 5 moles of sodium atoms in another container of same weight.(a) Whose container is heavier?(b) Whose container has more number of atoms?
Answer» Question 31 Raunak took 5 moles of carbon atoms in a container and Krish also took 5 moles of sodium atoms in another container of same weight. (a) Whose container is heavier? (b) Whose container has more number of atoms?

Discussion

6886.	What is the action of ammonia on sodium metal?
Answer» What is the action of ammonia on sodium metal?

Discussion

6887.	Isoelectronic species have:
Answer» Isoelectronic species have:

Discussion

6888.	Detergents are ammonium or sulphonate salts of long chain _________.
Answer» Detergents are ammonium or sulphonate salts of long chain _________.

Discussion

6889.	If a harmful chemical enters a food chain comprising cat, mice and plants, which one of these organisms is likely to have the maximum concentration of the harmful chemical in its body?
Answer» If a harmful chemical enters a food chain comprising cat, mice and plants, which one of these organisms is likely to have the maximum concentration of the harmful chemical in its body?

Discussion

6890.	The maximum flood flow from a catchment area of 50 km2 in New Delhi will be ___________m3/s[Use the value of constant as 6] 112.82
Answer» The maximum flood flow from a catchment area of 50 $k m^{2}$ in New Delhi will be ___________ $m^{3} / s$ [Use the value of constant as 6] 112.82

Discussion

6891.	Best way to dispose e-waste is
Answer» Best way to dispose e-waste is

Discussion

6892.	Leavening agents like ___ are used in cake and bread making process because they give out ___ gas which raises the food, lightens and softens it.
Answer» Leavening agents like ___ are used in cake and bread making process because they give out ___ gas which raises the food, lightens and softens it.

Discussion

6893.	Question 7What are the various energy transformations that occur when you are riding a bicycle?
Answer» Question 7 What are the various energy transformations that occur when you are riding a bicycle?

Discussion

6894.	Where do you think he got the money from to eat so much food?
Answer» Where do you think he got the money from to eat so much food?

Discussion

6895.	A __ series of carbon compounds have different number of carbon atoms but contain the same functional group.
Answer» A __ series of carbon compounds have different number of carbon atoms but contain the same functional group.

Discussion

6896.	Which among the following changes are exothermic or endothermic in nature?(a) Decomposition of ferrous sulphate(b) Dilution of sulphuric acid(c) Dissolution of sodium hydroxide in water(d) Dissolution of ammonium chloride in water
Answer» Which among the following changes are exothermic or endothermic in nature? (a) Decomposition of ferrous sulphate (b) Dilution of sulphuric acid (c) Dissolution of sodium hydroxide in water (d) Dissolution of ammonium chloride in water

6896.

Which among the following changes are exothermic or endothermic in nature?(a) Decomposition of ferrous sulphate(b) Dilution of sulphuric acid(c) Dissolution of sodium hydroxide in water(d) Dissolution of ammonium chloride in water

Answer»

Which among the following changes are exothermic or endothermic in nature?

(a) Decomposition of ferrous sulphate

(b) Dilution of sulphuric acid

(c) Dissolution of sodium hydroxide in water

(d) Dissolution of ammonium chloride in water

Discussion

6897.	Which of the following is NOT a redox reaction?
Answer» Which of the following is NOT a redox reaction?

Discussion

6898.	15. A solution x contains 30 mole percent of A and is equilibrium with its vapour that contains 40 mole percent of B. The ratio of vapour pressure of pure A and B will be:
Answer» 15. A solution x contains 30 mole percent of A and is equilibrium with its vapour that contains 40 mole percent of B. The ratio of vapour pressure of pure A and B will be:

Discussion

6899.	33. If the pressure of nitrogen and hydrogen mix in a close container is 100 atm and 20 percent of the mix reacts then the pressure at the same temp would be?
Answer» 33. If the pressure of nitrogen and hydrogen mix in a close container is 100 atm and 20 percent of the mix reacts then the pressure at the same temp would be?

Discussion

6900.	Complete the following reactionCu + HNO3→Cu(NO3)2 + H2O +
Answer» Complete the following reaction $Cu + {HNO}_{3} \to Cu ({NO}_{3})_{2} + H_{2} O +$

Discussion

Explore topic-wise InterviewSolutions in .

What volume of oxygen is required to burn completely a mixture of 22.4dm3 of methane and 11.2dm3 of hydrogen into carbon dioxide and steam? CH4+202→CO2+2H2O2H2+O2→2H2O

(a) Give the chemical name and formula of 'cryolite'.(b) What is the function of cryolite in the extraction of aluminium, other than acting as a solvent for bauxite?

The IUPAC name of isobutane is ___

Why ionisation energy of nitrogen is greater than oxygen

Name an indicator which is pink in alkaline solution but turns colourless in acidic solution.

write reason for the following (number in parenthesis is atomic number of substance). 1.Lithium (3) and sodium (11) are considered as active metals. 2. fluorine(9) is more active than chlorine(17)

Copper can form both cu+ and cu2+ ions, but zinc can form only Zn2+ ions. Why?

State how would you prepare copper (II) oxide from(a) copper nitrate.(b) copper carbonate.(c) copper sulphate.

8 gm sample of KMnO4 is rected in acidic medium with 100ml of 10 valume hydrogen peroxide . the percentage purity of KMnO4

why carboxylic acids have more boiling point compared aldehyde, ketones and alcohols but lesser than amides?

Which of the following options correctly represents the oxidation of Ag?

carbon combines with hydrogen to form compounds having the following compositions A carbon (%) 75, B carbon(%) 85.7 C carbon(%)92.3 show that the data illustrates the law of multiple proportions

44. When an aqueous solution of copper sulphate is electrolysed using copper electrodes the reaction at anode is represented by

Determine whether the following reaction is feasible. If yes complete them Al(OH)3+ CuCl2 =

The packing efficiency of the two-dimensional square unit cell shown below is:

In a reaction at equilibrium 'x' moles of the reac†an t A decomposes to give one molecule each of C and D. If the fraction of A decomposed at equilibrium is independent of initial concentration of A, then the value of 'x' is (1) 1 (2) 3 (3) 2 (4) 4

In the above setup, how will you test for the compound X?

What are the two properties of carbon which lead to the formation of a large number of carbon compounds?

100. If the periodic table has 10 period then the maximum number of elements in the periodic table will be_

A piece of granulated zinc was dropped into copper sulphate solution. After some time, the colour of the solution changed from :(1) light green to blue(2) blue to colourless (3) light green to colourless (4) bule to yellow

Coordinate bonds are also called:

37. 3 moles of an ideal gas expands, reversibly and its volume becomes double at 27^° C,then the entropy change will be (1)-22.5J/K (2)22.5J/K (3)17.3J/K (4)-11.5J/K

If a rough stainless steel spoon is to be electropolished, then the steel spoon is taken as the ___ in the electrolytic bath with copper and lead and a suitable electrolyte.

45. Vapour density of a metal chloride is 77. If its equivalent weight is 3, its atomic weight will be?

What is the general formula of the homologous series of alcohols?

What is the difference between physical properties of alkali and alkaline?

what is meant by skeletal equation ?why it should be balanced? balance some of the difficult skeletal equation?

How can we balance the following. when a strip of copper metal is placed in a solution of silver nitrate, metallic silver is precipitated and a solution containing copper nitrate is formed. Can you explain it with steps Write the reactants and the products in equation form

Select the correct options for the electrolysis of lead bromide.

Explain the terms:(i) Electrorefining(ii) Electrometallurgy(iii) Anode mud

An element in H atom in tis ground state absorbs 1.5times as much energy as the minimum required for ionisation of the atom.Thus KE of emitted electron is

A10 per of aqueous solution contain 5 g of salt in it calculate the amount of water that should evaporate to make its concentration 15 percentage

Question 31Raunak took 5 moles of carbon atoms in a container and Krish also took 5 moles of sodium atoms in another container of same weight.(a) Whose container is heavier?(b) Whose container has more number of atoms?

What is the action of ammonia on sodium metal?

Isoelectronic species have:

Detergents are ammonium or sulphonate salts of long chain _________.

If a harmful chemical enters a food chain comprising cat, mice and plants, which one of these organisms is likely to have the maximum concentration of the harmful chemical in its body?

The maximum flood flow from a catchment area of 50 km2 in New Delhi will be ___________m3/s[Use the value of constant as 6] 112.82

Best way to dispose e-waste is

Leavening agents like ___ are used in cake and bread making process because they give out ___ gas which raises the food, lightens and softens it.

Question 7What are the various energy transformations that occur when you are riding a bicycle?

Where do you think he got the money from to eat so much food?

A __ series of carbon compounds have different number of carbon atoms but contain the same functional group.

Which among the following changes are exothermic or endothermic in nature?(a) Decomposition of ferrous sulphate(b) Dilution of sulphuric acid(c) Dissolution of sodium hydroxide in water(d) Dissolution of ammonium chloride in water

Which of the following is NOT a redox reaction?

15. A solution x contains 30 mole percent of A and is equilibrium with its vapour that contains 40 mole percent of B. The ratio of vapour pressure of pure A and B will be:

33. If the pressure of nitrogen and hydrogen mix in a close container is 100 atm and 20 percent of the mix reacts then the pressure at the same temp would be?

Complete the following reactionCu + HNO3→Cu(NO3)2 + H2O +

Leavening agents like _ are used in cake and bread making process because they give out _ gas which raises the food, lightens and softens it.