15280 + Interview Questions in Chemistry Page 37 InterviewSolution

1801.	To obtain Zn from zinc sulphide two chemical reactions are involvedWrite the equations for A and B.
Answer» To obtain Zn from zinc sulphide two chemical reactions are involved Write the equations for A and B.

1801.

To obtain Zn from zinc sulphide two chemical reactions are involvedWrite the equations for A and B.

Answer»

To obtain Zn from zinc sulphide two chemical reactions are involved

Write the equations for A and B.

1802.	Aluminium reacts with oxygen to form aluminium oxide. How many moles of oxygen required to react completely with 0.5 moles of aliminium?
Answer» Aluminium reacts with oxygen to form aluminium oxide. How many moles of oxygen required to react completely with $0.5$ moles of aliminium?

Discussion

1803.	Name one metal each occurring as,(1) A sulphide.(2) A carbonate.(3) An oxide.
Answer» Name one metal each occurring as, (1) A sulphide. (2) A carbonate. (3) An oxide.

1803.

Name one metal each occurring as,(1) A sulphide.(2) A carbonate.(3) An oxide.

Answer»

Name one metal each occurring as,

(1) A sulphide.

(2) A carbonate.

(3) An oxide.

Discussion

1804.	What is dipole
Answer» What is dipole

Discussion

1805.	Choose the correct option (based on family/group):
Answer» Choose the correct option (based on family/group):

Discussion

1806.	List the properties of ammonia that make it(i) A good refrigerant(ii) A cleaning agent(iii) As a source of hydrogen.
Answer» List the properties of ammonia that make it (i) A good refrigerant (ii) A cleaning agent (iii) As a source of hydrogen.

Discussion

1807.	The following statement is correct only under certain conditions. Rewrite the statement including the appropriate condition(s) and underline it in your answer.Copper and nitric acid react together to produce nitrogen dioxide.
Answer» The following statement is correct only under certain conditions. Rewrite the statement including the appropriate condition(s) and underline it in your answer. Copper and nitric acid react together to produce nitrogen dioxide.

Discussion

1808.	What is the effect of an acidic and basic solution on a blue limus paper
Answer» What is the effect of an acidic and basic solution on a blue limus paper

Discussion

1809.	A person found that the cake prepared by him is hard and small in size. Which ingredient has he forgotten to add that would have caused the cake to rise and become light? Explain your answer.
Answer» A person found that the cake prepared by him is hard and small in size. Which ingredient has he forgotten to add that would have caused the cake to rise and become light? Explain your answer.

Discussion

1810.	50 ml of 1M oxalic acid is shaken with 0.5 g of wood charcoal. The final concentration of the solution after adsorption is 0.5 M. Calculate the amount of oxalic acid adsorbed per gram charcoal.
Answer» 50 ml of 1M oxalic acid is shaken with 0.5 g of wood charcoal. The final concentration of the solution after adsorption is 0.5 M. Calculate the amount of oxalic acid adsorbed per gram charcoal.

1810.

50 ml of 1M oxalic acid is shaken with 0.5 g of wood charcoal. The final concentration of the solution after adsorption is 0.5 M. Calculate the amount of oxalic acid adsorbed per gram charcoal.

Answer»

50 ml of 1M oxalic acid is shaken with 0.5 g of wood charcoal. The final concentration of the solution after adsorption is 0.5 M. Calculate the amount of oxalic acid adsorbed per gram charcoal.

Discussion

1811.	11. For the reaction A+3B\xrightarrow{}2C+D,initial mole of A is twice that of B.If at equilibrium moles of B and C are equal,then percent of B reacted is?
Answer» 11. For the reaction A+3B\xrightarrow{}2C+D,initial mole of A is twice that of B.If at equilibrium moles of B and C are equal,then percent of B reacted is?

Discussion

1812.	(a) State observation at the anode when aqueous copper sulphate solution is electrolysed using copper electrodes. (b) During electrolysis of molten lead bromide, graphite anode is preferred to other electrodes. Give reason. (c) Electrolysis of molten lead bromide is considered to be a redox reaction. Give reason.
Answer» (a) State observation at the anode when aqueous copper sulphate solution is electrolysed using copper electrodes. (b) During electrolysis of molten lead bromide, graphite anode is preferred to other electrodes. Give reason. (c) Electrolysis of molten lead bromide is considered to be a redox reaction. Give reason.

1812.

(a) State observation at the anode when aqueous copper sulphate solution is electrolysed using copper electrodes. (b) During electrolysis of molten lead bromide, graphite anode is preferred to other electrodes. Give reason. (c) Electrolysis of molten lead bromide is considered to be a redox reaction. Give reason.

Answer»

(a) State observation at the anode when aqueous copper sulphate solution is electrolysed using copper electrodes.

(b) During electrolysis of molten lead bromide, graphite anode is preferred to other electrodes. Give reason.

(c) Electrolysis of molten lead bromide is considered to be a redox reaction. Give reason.

Discussion

1813.	2.does colour of ph paper changes with change in molarity?
Answer» 2.does colour of ph paper changes with change in molarity?

Discussion

1814.	What does enthalpy mean?
Answer» What does enthalpy mean?

Discussion

1815.	(i) What is a lone pair of electrons?(ii) Draw an electron dot diagram of a hydronium ion and label the lone pair of electrons.(iii) Name a neutral covalent molecule which contains one lone pair of electrons.
Answer» (i) What is a lone pair of electrons? (ii) Draw an electron dot diagram of a hydronium ion and label the lone pair of electrons. (iii) Name a neutral covalent molecule which contains one lone pair of electrons.

Discussion

1816.	(a) What is the action of red litmus on (i) dry ammonia gas (ii) solution of ammonia gas in water? (b) State the observations you would make on adding ammonium hydroxide to aqueous solution of (i) Ferrous sulphate (ii) Aluminium chloride. [3 MARKS]
Answer» (a) What is the action of red litmus on (i) dry ammonia gas (ii) solution of ammonia gas in water? (b) State the observations you would make on adding ammonium hydroxide to aqueous solution of (i) Ferrous sulphate (ii) Aluminium chloride. [3 MARKS]

Discussion

1817.	What are bases?
Answer» What are bases?

Discussion

1818.	How do you classify acids as strong and weak acids
Answer» How do you classify acids as strong and weak acids

Discussion

1819.	(a) What is meant by the term 'electrolyte'?(b) What are the particles present in a compound which is a non-electrolyte?(c) If an electrolyte is described as a 'strong electrolyte', what does this mean?
Answer» (a) What is meant by the term 'electrolyte'? (b) What are the particles present in a compound which is a non-electrolyte? (c) If an electrolyte is described as a 'strong electrolyte', what does this mean?

Discussion

1820.	What happens when a piece of aluminium metal is added to dilute hydrochloric acid?Also, write the balanced chemical equation if the reaction occurs.
Answer» What happens when a piece of aluminium metal is added to dilute hydrochloric acid? Also, write the balanced chemical equation if the reaction occurs.

Discussion

1821.	Which of the following is not an ionizable compound?
Answer» Which of the following is not an ionizable compound?

Discussion

1822.	LioH is considered strong Or weak base?
Answer» LioH is considered strong Or weak base?

Discussion

1823.	The number of carbon atoms present in the molecule of the fifth member of the homologous series of alkynes is : (a) four (b) five (c) six (d) seven
Answer» The number of carbon atoms present in the molecule of the fifth member of the homologous series of alkynes is : (a) four (b) five (c) six (d) seven

Discussion

1824.	Define an alloy and an amalgam. State the main constituents of the following alloys: Stainless steel, Bronze. In which property is each of them different from its main constituents? [5 MARKS]
Answer» Define an alloy and an amalgam. State the main constituents of the following alloys: Stainless steel, Bronze. In which property is each of them different from its main constituents? [5 MARKS]

Discussion

1825.	when benzene is treated with cl2 in presence of AlCl3 in dark then we get substituted product but when treated with cl2 in presence of light and high temperature then we get addition product.how to identify whether reaction is addition or, substitution reaction
Answer» when benzene is treated with cl2 in presence of AlCl3 in dark then we get substituted product but when treated with cl2 in presence of light and high temperature then we get addition product.how to identify whether reaction is addition or, substitution reaction

Discussion

1826.	40. d4 to d7 co ordination entities are more stable for strong field as compared to weak field cases(in case of octahedral complexes) Why? And how?
Answer» 40. d4 to d7 co ordination entities are more stable for strong field as compared to weak field cases(in case of octahedral complexes) Why? And how?

Discussion

1827.	8 g of O2 has the same number of atoms as ___ gm of CO
Answer» $8 g$ of $O_{2}$ has the same number of atoms as ___ gm of CO

Discussion

1828.	When a strong base is added to water. Water becomes:
Answer» When a strong base is added to water. Water becomes:

Discussion

1829.	Q75/200 Correct order of nucleophilicity of the givennucleophiles in ethyl alcohol is phs-, pho- , I- , EtO-
Answer» Q75/200 Correct order of nucleophilicity of the givennucleophiles in ethyl alcohol is phs-, pho- , I- , EtO-

Discussion

1830.	When acetic acid reacts with ethyl alcohol, we add conc. H2SO4. It acts as _____ and the process is called _____.
Answer» When acetic acid reacts with ethyl alcohol, we add conc. H₂SO₄. It acts as _____ and the process is called _____.

Discussion

1831.	FACTORS AFFECTING MELTING POINT
Answer» FACTORS AFFECTING MELTING POINT

Discussion

1832.	QZ2) The organic chloro compound which shows complete stereochemistry inversion during a SN2 rxn is A) (CH3)3CCl B) (CH3)2CHCl C) CH3CL D) (C2H5)2CHCl
Answer» QZ2) The organic chloro compound which shows complete stereochemistry inversion during a SN2 rxn is A) (CH3)3CCl B) (CH3)2CHCl C) CH3CL D) (C2H5)2CHCl

Discussion

1833.	Does –H effect takes place in presence of carbocation
Answer» Does –H effect takes place in presence of carbocation

Discussion

1834.	A coin is analysed by dissolving it in nitric acid. To the resulting solution an excess of aqueous Ammonia is added and the mixture is filtered. A brown precipitate remains in the filter paper and a deep blue solution is obtained as the filtrate. Which metals does the coin contain?
Answer» A coin is analysed by dissolving it in nitric acid. To the resulting solution an excess of aqueous Ammonia is added and the mixture is filtered. A brown precipitate remains in the filter paper and a deep blue solution is obtained as the filtrate. Which metals does the coin contain?

Discussion

1835.	How can vannila essence and clove oil be used as indicators
Answer» How can vannila essence and clove oil be used as indicators

Discussion

1836.	Which amongst the following elements have the lowest number of electrons in the valence shell ?
Answer» Which amongst the following elements have the lowest number of electrons in the valence shell ?

Discussion

1837.	Explain the difference .(a) Metals and non-metals(b) Mixture and compounds(c) Atoms and molecules(d) Separation by distillation and by separating funnel
Answer» Explain the difference . (a) Metals and non-metals (b) Mixture and compounds (c) Atoms and molecules (d) Separation by distillation and by separating funnel

Discussion

1838.	What is the difference between hard acid and bases ?
Answer» What is the difference between hard acid and bases ?

Discussion

1839.	Question 1Which one of the following is an artificial ecosystem?(a) Pond(b) Crop field(c) Lake(d) Forest
Answer» Question 1 Which one of the following is an artificial ecosystem? (a) Pond (b) Crop field (c) Lake (d) Forest

Discussion

1840.	Q.How to find strong ligand and weak ligand
Answer» Q.How to find strong ligand and weak ligand

Discussion

1841.	Identify X.CO2+NaOH→H2O+X
Answer» Identify $X$ . ${C O}_{2} + N a O H \to H_{2} O + X$

Discussion

1842.	Why carbon monoxide is neutral to litmus,,
Answer» Why carbon monoxide is neutral to litmus,,

Discussion

1843.	Calculate the percentage composition of oxygen in lead nitrate [Pb(NO3)2].(Pb = 207, N = 14, O = 16)
Answer» Calculate the percentage composition of oxygen in lead nitrate [Pb(NO₃)₂]. (Pb = 207, N = 14, O = 16)

Discussion

1844.	25 ml of a 0.1 M solution of a stable cation of transition metal Z reacts exactly with 25 ml of 0.04 M acidified KMnO4 solution. Which of the following is most likely to represent the change in oxidation state of Z correctly ?
Answer» $25 ml$ of a $0.1 M$ solution of a stable cation of transition metal $Z$ reacts exactly with $25 ml$ of $0.04 M$ acidified $K M n O_{4}$ solution. Which of the following is most likely to represent the change in oxidation state of $Z$ correctly ?

Discussion

1845.	A particle is moving according to equation t = under root x +3 ,the particle will be found at rest at t is equal to ??
Answer» A particle is moving according to equation t = under root x +3 ,the particle will be found at rest at t is equal to ??

Discussion

1846.	29. Give more explanation to finding group no and period no of f block p block element
Answer» 29. Give more explanation to finding group no and period no of f block p block element

Discussion

1847.	Find the incorrect set of quantum numbers.
Answer» Find the incorrect set of quantum numbers.

Discussion

1848.	Which group of elements was missing from Mendeleev's original periodic table ?
Answer» Which group of elements was missing from Mendeleev's original periodic table ?

Discussion

1849.	Bond order for 1. No2+ 2.No3- 3.No2 4.No2-
Answer» Bond order for 1. No2+ 2.No3- 3.No2 4.No2-

Discussion

1850.	How many coulombs of electricity are required for the oxidation of 1 mole of H2O to O2?(1) 9.65×10⁴(2) 48.25×10⁴(3) 19.3×10⁴(4)1.93×10⁴
Answer» How many coulombs of electricity are required for the oxidation of 1 mole of H2O to O2? (1) 9.65×10⁴ (2) 48.25×10⁴ (3) 19.3×10⁴ (4)1.93×10⁴

Discussion

Explore topic-wise InterviewSolutions in .

To obtain Zn from zinc sulphide two chemical reactions are involvedWrite the equations for A and B.

Aluminium reacts with oxygen to form aluminium oxide. How many moles of oxygen required to react completely with 0.5 moles of aliminium?

Name one metal each occurring as,(1) A sulphide.(2) A carbonate.(3) An oxide.

What is dipole

Choose the correct option (based on family/group):

List the properties of ammonia that make it(i) A good refrigerant(ii) A cleaning agent(iii) As a source of hydrogen.

The following statement is correct only under certain conditions. Rewrite the statement including the appropriate condition(s) and underline it in your answer.Copper and nitric acid react together to produce nitrogen dioxide.

What is the effect of an acidic and basic solution on a blue limus paper

A person found that the cake prepared by him is hard and small in size. Which ingredient has he forgotten to add that would have caused the cake to rise and become light? Explain your answer.

50 ml of 1M oxalic acid is shaken with 0.5 g of wood charcoal. The final concentration of the solution after adsorption is 0.5 M. Calculate the amount of oxalic acid adsorbed per gram charcoal.

11. For the reaction A+3B\xrightarrow{}2C+D,initial mole of A is twice that of B.If at equilibrium moles of B and C are equal,then percent of B reacted is?

2.does colour of ph paper changes with change in molarity?

What does enthalpy mean?

(i) What is a lone pair of electrons?(ii) Draw an electron dot diagram of a hydronium ion and label the lone pair of electrons.(iii) Name a neutral covalent molecule which contains one lone pair of electrons.

(a) What is the action of red litmus on (i) dry ammonia gas (ii) solution of ammonia gas in water? (b) State the observations you would make on adding ammonium hydroxide to aqueous solution of (i) Ferrous sulphate (ii) Aluminium chloride. [3 MARKS]

What are bases?

How do you classify acids as strong and weak acids

(a) What is meant by the term 'electrolyte'?(b) What are the particles present in a compound which is a non-electrolyte?(c) If an electrolyte is described as a 'strong electrolyte', what does this mean?

What happens when a piece of aluminium metal is added to dilute hydrochloric acid?Also, write the balanced chemical equation if the reaction occurs.

Which of the following is not an ionizable compound?

LioH is considered strong Or weak base?

The number of carbon atoms present in the molecule of the fifth member of the homologous series of alkynes is : (a) four (b) five (c) six (d) seven

Define an alloy and an amalgam. State the main constituents of the following alloys: Stainless steel, Bronze. In which property is each of them different from its main constituents? [5 MARKS]

when benzene is treated with cl2 in presence of AlCl3 in dark then we get substituted product but when treated with cl2 in presence of light and high temperature then we get addition product.how to identify whether reaction is addition or, substitution reaction

40. d4 to d7 co ordination entities are more stable for strong field as compared to weak field cases(in case of octahedral complexes) Why? And how?

8 g of O2 has the same number of atoms as ___ gm of CO

When a strong base is added to water. Water becomes:

Q75/200 Correct order of nucleophilicity of the givennucleophiles in ethyl alcohol is phs-, pho- , I- , EtO-

When acetic acid reacts with ethyl alcohol, we add conc. H2SO4. It acts as _____ and the process is called _____.

FACTORS AFFECTING MELTING POINT

QZ2) The organic chloro compound which shows complete stereochemistry inversion during a SN2 rxn is A) (CH3)3CCl B) (CH3)2CHCl C) CH3CL D) (C2H5)2CHCl

Does –H effect takes place in presence of carbocation

A coin is analysed by dissolving it in nitric acid. To the resulting solution an excess of aqueous Ammonia is added and the mixture is filtered. A brown precipitate remains in the filter paper and a deep blue solution is obtained as the filtrate. Which metals does the coin contain?

How can vannila essence and clove oil be used as indicators

Which amongst the following elements have the lowest number of electrons in the valence shell ?

Explain the difference .(a) Metals and non-metals(b) Mixture and compounds(c) Atoms and molecules(d) Separation by distillation and by separating funnel

What is the difference between hard acid and bases ?

Question 1Which one of the following is an artificial ecosystem?(a) Pond(b) Crop field(c) Lake(d) Forest

Q.How to find strong ligand and weak ligand

Identify X.CO2+NaOH→H2O+X

Why carbon monoxide is neutral to litmus,,

Calculate the percentage composition of oxygen in lead nitrate [Pb(NO3)2].(Pb = 207, N = 14, O = 16)

25 ml of a 0.1 M solution of a stable cation of transition metal Z reacts exactly with 25 ml of 0.04 M acidified KMnO4 solution. Which of the following is most likely to represent the change in oxidation state of Z correctly ?

A particle is moving according to equation t = under root x +3 ,the particle will be found at rest at t is equal to ??

29. Give more explanation to finding group no and period no of f block p block element

Find the incorrect set of quantum numbers.

Which group of elements was missing from Mendeleev's original periodic table ?

Bond order for 1. No2+ 2.No3- 3.No2 4.No2-

How many coulombs of electricity are required for the oxidation of 1 mole of H2O to O2?(1) 9.65×10⁴(2) 48.25×10⁴(3) 19.3×10⁴(4)1.93×10⁴

When acetic acid reacts with ethyl alcohol, we add conc. H2SO4. It acts as _ and the process is called _.