15280 + Interview Questions in Chemistry Page 284 InterviewSolution

14151.	What is the strongest chemical bond?
Answer» What is the strongest chemical bond?

Discussion

14152.	Azad Ltd purchased furniture on October 1, 2002, for Rs 4,50,000. On March 1, 2003, it purchased another furniture for Rs 3,00,000. On July 1, 2004, it sold it off the first furniture purchased in 2002 for Rs 2,25,000. Depreciation is provided at 15% per annum on written down value method each year. Accounts are closed each year on March 31. Prepare Furniture account and Accumulated depreciation account for the years ended on March 31, 2003, March 31, 2004, and March 31, 2005. Also, give the above two accounts if Furniture disposal account is opened.
Answer» Azad Ltd purchased furniture on October 1, 2002, for Rs 4,50,000. On March 1, 2003, it purchased another furniture for Rs 3,00,000. On July 1, 2004, it sold it off the first furniture purchased in 2002 for Rs 2,25,000. Depreciation is provided at $15 %$ per annum on written down value method each year. Accounts are closed each year on March 31. Prepare Furniture account and Accumulated depreciation account for the years ended on March 31, 2003, March 31, 2004, and March 31, 2005. Also, give the above two accounts if Furniture disposal account is opened.

Discussion

14153.	In the activity of electrolysis of water, how to test the obtained gases present in the test tubes?
Answer» In the activity of electrolysis of water, how to test the obtained gases present in the test tubes?

Discussion

14154.	A compound has the following percentage composition by mass: carbon 14.4%,hydrogen 1.2% and chlorine 84.5%. Determine the empirical formula of this compound. [H = 1;C=12;Cl = 35.5]
Answer» A compound has the following percentage composition by mass: carbon 14.4%,hydrogen 1.2% and chlorine 84.5%. Determine the empirical formula of this compound. [H = 1;C=12;Cl = 35.5]

Discussion

14155.	How can we consider plants to be alive ? Give examples also
Answer» How can we consider plants to be alive ? Give examples also

Discussion

14156.	Ammonia reacts with carbon dioxide at 1500C to give a valuable nitrogenous fertilizer X. Name this fertilizer.
Answer» Ammonia reacts with carbon dioxide at $150^{0} C$ to give a valuable nitrogenous fertilizer X. Name this fertilizer.

Discussion

14157.	Which of the following hydrocarbons will give substitutuion reactions and why ? CH4, C3H6, C3H8, C4H6, C5H12,C5H10
Answer» Which of the following hydrocarbons will give substitutuion reactions and why ? $C H_{4}, C_{3} H_{6}, C_{3} H_{8}, C_{4} H_{6}, C_{5} H_{12}, C_{5} H_{10}$

Discussion

14158.	Which metals do not react with oxygen at high tempetature
Answer» Which metals do not react with oxygen at high tempetature

Discussion

14159.	Rewrite the following statements after correction, if necessary : (a) Groups have elements with consecutive atomic numbers. (b) Periods are the horizontal rows of elements. (c) Isotopes are the elements of the same group.
Answer» Rewrite the following statements after correction, if necessary : (a) Groups have elements with consecutive atomic numbers. (b) Periods are the horizontal rows of elements. (c) Isotopes are the elements of the same group.

14159.

Rewrite the following statements after correction, if necessary : (a) Groups have elements with consecutive atomic numbers. (b) Periods are the horizontal rows of elements. (c) Isotopes are the elements of the same group.

Answer»

Rewrite the following statements after correction, if necessary :

(a) Groups have elements with consecutive atomic numbers.

(b) Periods are the horizontal rows of elements.

(c) Isotopes are the elements of the same group.

Discussion

14160.	Iron losts its identity and property when corroded........while other metals do not...........why????
Answer» Iron losts its identity and property when corroded........while other metals do not...........why????

Discussion

14161.	What happens when the vapour of ethanol is passed over the heated copper catalyst at 573 K?
Answer» What happens when the vapour of ethanol is passed over the heated copper catalyst at 573 K?

Discussion

14162.	The reaction in which hydrogen is added to substance and oxygen is removed from substance, is called __ reaction.
Answer» The reaction in which hydrogen is added to substance and oxygen is removed from substance, is called __ reaction.

Discussion

14163.	Importance of PH in everyday life
Answer» Importance of PH in everyday life

Discussion

14164.	What are halogens, ketones, alcohol, aldehydes, carboxylic acid ?
Answer» What are halogens, ketones, alcohol, aldehydes, carboxylic acid ?

Discussion

14165.	During electrolytic refining of silver metal which electrolyte must be used?
Answer» During electrolytic refining of silver metal which electrolyte must be used?

Discussion

14166.	The electronic configuration and group number in the periodic table in which the element with atomic number 107 lies are
Answer» The electronic configuration and group number in the periodic table in which the element with atomic number 107 lies are

Discussion

14167.	Read the following statements(i) When a red litmus paper is dipped into reaction mixture of a saponification reaction, it turns blue and the reaction is exothermic.(ii) When a blue litmus paper is dipped into reaction mixture of a saponification reaction, its colour does not change and the reaction is exothermic(iii) When a red litmus paper is dipped into reaction mixture of a saponification reaction, its colour does not change and the reaction is endothermic.(iv) When a blue litmus paper is dipped into reaction mixture of a saponification reaction, its colour does not change and the reaction is endothermic.Which of the above statements are correct
Answer» Read the following statements (i) When a red litmus paper is dipped into reaction mixture of a saponification reaction, it turns blue and the reaction is exothermic. (ii) When a blue litmus paper is dipped into reaction mixture of a saponification reaction, its colour does not change and the reaction is exothermic (iii) When a red litmus paper is dipped into reaction mixture of a saponification reaction, its colour does not change and the reaction is endothermic. (iv) When a blue litmus paper is dipped into reaction mixture of a saponification reaction, its colour does not change and the reaction is endothermic. Which of the above statements are correct

14167.

Read the following statements(i) When a red litmus paper is dipped into reaction mixture of a saponification reaction, it turns blue and the reaction is exothermic.(ii) When a blue litmus paper is dipped into reaction mixture of a saponification reaction, its colour does not change and the reaction is exothermic(iii) When a red litmus paper is dipped into reaction mixture of a saponification reaction, its colour does not change and the reaction is endothermic.(iv) When a blue litmus paper is dipped into reaction mixture of a saponification reaction, its colour does not change and the reaction is endothermic.Which of the above statements are correct

Answer»

Read the following statements

(i) When a red litmus paper is dipped into reaction mixture of a saponification reaction, it turns blue and the reaction is exothermic.

(ii) When a blue litmus paper is dipped into reaction mixture of a saponification reaction, its colour does not change and the reaction is exothermic

(iii) When a red litmus paper is dipped into reaction mixture of a saponification reaction, its colour does not change and the reaction is endothermic.

(iv) When a blue litmus paper is dipped into reaction mixture of a saponification reaction, its colour does not change and the reaction is endothermic.

Which of the above statements are correct

Discussion

14168.	Complete and balance the following equations ? (a) CH4+O2⟶ (b) CH4+Cl2Sunlight−−−−−→
Answer» Complete and balance the following equations ? (a) $C H_{4} + O_{2} ⟶$ (b) $C H_{4} + C l_{2} S u n l i g h t - ---- \to$

Discussion

14169.	Corrosion of iron in presence of oxygen leads to reddish brown powder (Iron oxide). This process is called __ of iron.
Answer» Corrosion of iron in presence of oxygen leads to reddish brown powder (Iron oxide). This process is called __ of iron.

Discussion

14170.	Which of the following anion is gives a colourless solution?
Answer» Which of the following anion is gives a colourless solution?

Discussion

14171.	what would happen if moist blue litmus paper and moist red litmus paper are introduced in the jar of hydrogen
Answer» what would happen if moist blue litmus paper and moist red litmus paper are introduced in the jar of hydrogen

Discussion

14172.	The metal M reacts vigorously with water to form a solution S and a gas G . The solution is turned red litmus to blue where as gas G which is lighter than air burns with a pop sound . Metal M has a low melting point and it is used as coolant in nuclear reactor a) what is metal M b) what is solution S? Is it acidic or alkaline c) what is gas G d) write a balanced chemical equation for the reaction which takes place when metal M reacts with water e) is this reaction exothermic or endothermic
Answer» The metal M reacts vigorously with water to form a solution S and a gas G . The solution is turned red litmus to blue where as gas G which is lighter than air burns with a pop sound . Metal M has a low melting point and it is used as coolant in nuclear reactor a) what is metal M b) what is solution S? Is it acidic or alkaline c) what is gas G d) write a balanced chemical equation for the reaction which takes place when metal M reacts with water e) is this reaction exothermic or endothermic

Discussion

14173.	Concentrated hydrochloric acid is __(corrosive / non- corrosive) in nature.
Answer» Concentrated hydrochloric acid is __(corrosive / non- corrosive) in nature.

Discussion

14174.	Complete the following equations: (a) CH4+O2⟶ (b) CH2+H5OHHot Conc. H2SO4−−−−−−−−−−−→ (c) CH3COOH+NaOH⟶
Answer» Complete the following equations: (a) $C H_{4} + O_{2} ⟶$ (b) $C H_{2} + H_{5} O H H o t C o n c . H_{2} S O_{4} - ---------- \to$ (c) $C H_{3} C O O H + N a O H ⟶$

Discussion

14175.	What volume of oxygen is required to burn completely a mixture of 22.4 dm3 of methane and 11.2 dm3 of hydrogen into carbon dioxide and steam? Equations of the reactions are given below. (Assume that all volumes are measured at STP). CH4 + 2O2 → CO2 +2H2O 2H2 + O2 → 2H2O
Answer» What volume of oxygen is required to burn completely a mixture of 22.4 dm³ of methane and 11.2 dm³ of hydrogen into carbon dioxide and steam? Equations of the reactions are given below. (Assume that all volumes are measured at STP). CH₄ + 2O₂ → CO₂ +2H₂O 2H₂ + O₂ → 2H₂O

14175.

What volume of oxygen is required to burn completely a mixture of 22.4 dm3 of methane and 11.2 dm3 of hydrogen into carbon dioxide and steam? Equations of the reactions are given below. (Assume that all volumes are measured at STP). CH4 + 2O2 → CO2 +2H2O 2H2 + O2 → 2H2O

Answer»

What volume of oxygen is required to burn completely a mixture of 22.4 dm³ of methane and 11.2 dm³ of hydrogen into carbon dioxide and steam?

Equations of the reactions are given below. (Assume that all volumes are measured at STP).

CH₄ + 2O₂ → CO₂ +2H₂O

2H₂ + O₂ → 2H₂O

Discussion

14176.	What is the pH range at which are our body functions?
Answer» What is the pH range at which are our body functions?

Discussion

14177.	The following experiment was performed in order t odeterminethe formula of a hydrocarbon. The hydrocarbon X is purified by franctional distillation 0.145 g of X were heated with dry copper (II) oxide and 224 cm3 of carbon dioxide was collected at STP. (a) Which element does X contain (b) what was the purpose of Copper (ii) oxide? \|(c) Calculate the empirical formula of X by the following steps: (i) calculate the number of moles of carbon dioxide gas. (ii) Calculate the mass of carbon contained in this quantity of carbon dioxide and thus the mass of carbon in sample X. (iii) calculate the mass of hydrogen in sample X. (iv) Reduce the ratio of atoms of each element in X (empirical formula).
Answer» The following experiment was performed in order t odeterminethe formula of a hydrocarbon. The hydrocarbon X is purified by franctional distillation 0.145 g of X were heated with dry copper (II) oxide and 224 $c m^{3}$ of carbon dioxide was collected at STP. (a) Which element does X contain (b) what was the purpose of Copper (ii) oxide? \|(c) Calculate the empirical formula of X by the following steps: (i) calculate the number of moles of carbon dioxide gas. (ii) Calculate the mass of carbon contained in this quantity of carbon dioxide and thus the mass of carbon in sample X. (iii) calculate the mass of hydrogen in sample X. (iv) Reduce the ratio of atoms of each element in X (empirical formula).

14177.

The following experiment was performed in order t odeterminethe formula of a hydrocarbon. The hydrocarbon X is purified by franctional distillation 0.145 g of X were heated with dry copper (II) oxide and 224 cm3 of carbon dioxide was collected at STP. (a) Which element does X contain (b) what was the purpose of Copper (ii) oxide? |(c) Calculate the empirical formula of X by the following steps: (i) calculate the number of moles of carbon dioxide gas. (ii) Calculate the mass of carbon contained in this quantity of carbon dioxide and thus the mass of carbon in sample X. (iii) calculate the mass of hydrogen in sample X. (iv) Reduce the ratio of atoms of each element in X (empirical formula).

Answer»

The following experiment was performed in order t odeterminethe formula of a hydrocarbon. The hydrocarbon X is purified by franctional distillation
0.145 g of X were heated with dry copper (II) oxide and 224 $c m^{3}$ of carbon dioxide was collected at STP.
(a) Which element does X contain
(b) what was the purpose of Copper (ii) oxide?

|(c) Calculate the empirical formula of X by the following steps:
(i) calculate the number of moles of carbon dioxide gas.
(ii) Calculate the mass of carbon contained in this quantity of carbon dioxide and thus the mass of carbon in sample X.
(iii) calculate the mass of hydrogen in sample X.
(iv) Reduce the ratio of atoms of each element in X (empirical formula).

Discussion

14178.	What is the effect of ammonia on wet red litmus paper?
Answer» What is the effect of ammonia on wet red litmus paper?

Discussion

14179.	(a) The mass of 5.6 litres fo a certain gas at STP is 12 g. What is the relative molecular mass or molar mass of the gas? (b) Calculate the volume occupied at S.T.P. by 2 moles of SO2
Answer» (a) The mass of 5.6 litres fo a certain gas at STP is 12 g. What is the relative molecular mass or molar mass of the gas? (b) Calculate the volume occupied at S.T.P. by 2 moles of $S O_{2}$

Discussion

14180.	Which of the following elements are required by living organisms for their life processes?
Answer» Which of the following elements are required by living organisms for their life processes?

Discussion

14181.	How many grams of oxygen are required for complete combustion of 2 moles of benzene?
Answer» How many grams of oxygen are required for complete combustion of 2 moles of benzene?

Discussion

14182.	How is ethene prepared by: (a) dehydrohalogenation reaction (b) dehydration reaction? Given equations and name the products formed. [2 MARKS]
Answer» How is ethene prepared by: (a) dehydrohalogenation reaction (b) dehydration reaction? Given equations and name the products formed. [2 MARKS]

Discussion

14183.	Which of the following are allotropes of carbon?
Answer» Which of the following are allotropes of carbon?

Discussion

14184.	If the producers has 100 kcal of energy, how much energy in kcal will be available for tertiary consumers?0.1
Answer» If the producers has 100 kcal of energy, how much energy in kcal will be available for tertiary consumers? 0.1

Discussion

14185.	What do you see when concentrated sulphuric acid is added to copper sulphate 5-water?
Answer» What do you see when concentrated sulphuric acid is added to copper sulphate 5-water?

Discussion

14186.	The chemical formula of Cryolite an important mineral of aluminium is:
Answer» The chemical formula of Cryolite an important mineral of aluminium is:

Discussion

14187.	What happens when SO2 gas is mixed with water?
Answer» What happens when SO₂ gas is mixed with water?

Discussion

14188.	Isotopes differ in:
Answer» Isotopes differ in:

Discussion

14189.	The long form of periodic table has
Answer» The long form of periodic table has

Discussion

14190.	Sulphuric acid can be prepared by reacting Sulphur with
Answer» Sulphuric acid can be prepared by reacting Sulphur with

Discussion

14191.	What are the types of acids on the basis of their source?
Answer» What are the types of acids on the basis of their source?

Discussion

14192.	Will the configuration be E or Z?
Answer» Will the configuration be E or Z?

Discussion

14193.	How did Mendeleev exactly predict the mass of eka aluminium?
Answer» How did Mendeleev exactly predict the mass of eka aluminium?

Discussion

14194.	Identify the characteriestics of a chemical reaction.
Answer» Identify the characteriestics of a chemical reaction.

Discussion

14195.	Calculat the relative molecular masses of : (a) Ammonium chloroplatinate(NH4)2PtCl6 (b) Potassium chlorate, (c) CuSO4.5H2O, (d) (NH4)2SO4 (e) CH3COONa, (f) CHCl3 (g) (NH4)2Cr2O7.
Answer» Calculat the relative molecular masses of : (a) Ammonium chloroplatinate $(N H_{4})_{2} P t C l_{6}$ (b) Potassium chlorate, (c) $C u S O_{4} . 5 H_{2} O,$ (d) $(N H_{4})_{2} S O_{4}$ (e) $C H_{3} C O O N a,$ (f) $C H C l_{3}$ (g) $(N H_{4})_{2} C r_{2} O_{7}$ .

Discussion

14196.	What is the versatile Nature of carbon? Explain.
Answer» What is the versatile Nature of carbon? Explain.

Discussion

14197.	An aldehyde as well as a ketone can be represented by the same molecular formula, say C3H6O. Write their structures and name them. State the relation between the two in the language of science.
Answer» An aldehyde as well as a ketone can be represented by the same molecular formula, say $C_{3} H_{6} O$ . Write their structures and name them. State the relation between the two in the language of science.

Discussion

14198.	Two hydrogen atoms are in excited state with electrons residing in n=2. First one is moving towards left and emits a photon of energy E1 towards right. Second one is moving towards right with same speed and emits a photon of energy E2 towards right. Taking recoil of nucleus into account during emission process (Assume that direction of motion of the atom is unaltered due to emission)
Answer» Two hydrogen atoms are in excited state with electrons residing in n=2. First one is moving towards left and emits a photon of energy $E_{1}$ towards right. Second one is moving towards right with same speed and emits a photon of energy $E_{2}$ towards right. Taking recoil of nucleus into account during emission process (Assume that direction of motion of the atom is unaltered due to emission)

Discussion

14199.	The number of atoms in 62 g of phosphorous if its gram atomic mass is 31 g is .
Answer» The number of atoms in 62 g of phosphorous if its gram atomic mass is 31 g is .

Discussion

14200.	Write balanced chemical reactions for the following and name the type of reaction – a) Solid lead nitrate is heated b) Quick lime is added to water c) Iron nails are added to a solution of Silver Bromide
Answer» Write balanced chemical reactions for the following and name the type of reaction – a) Solid lead nitrate is heated b) Quick lime is added to water c) Iron nails are added to a solution of Silver Bromide

Discussion

Explore topic-wise InterviewSolutions in .

What is the strongest chemical bond?

In the activity of electrolysis of water, how to test the obtained gases present in the test tubes?

A compound has the following percentage composition by mass: carbon 14.4%,hydrogen 1.2% and chlorine 84.5%. Determine the empirical formula of this compound. [H = 1;C=12;Cl = 35.5]

How can we consider plants to be alive ? Give examples also

Ammonia reacts with carbon dioxide at 1500C to give a valuable nitrogenous fertilizer X. Name this fertilizer.

Which of the following hydrocarbons will give substitutuion reactions and why ? CH4, C3H6, C3H8, C4H6, C5H12,C5H10

Which metals do not react with oxygen at high tempetature

Rewrite the following statements after correction, if necessary : (a) Groups have elements with consecutive atomic numbers. (b) Periods are the horizontal rows of elements. (c) Isotopes are the elements of the same group.

Iron losts its identity and property when corroded........while other metals do not...........why????

What happens when the vapour of ethanol is passed over the heated copper catalyst at 573 K?

The reaction in which hydrogen is added to substance and oxygen is removed from substance, is called __ reaction.

Importance of PH in everyday life

What are halogens, ketones, alcohol, aldehydes, carboxylic acid ?

During electrolytic refining of silver metal which electrolyte must be used?

The electronic configuration and group number in the periodic table in which the element with atomic number 107 lies are

Complete and balance the following equations ? (a) CH4+O2⟶ (b) CH4+Cl2Sunlight−−−−−→

Corrosion of iron in presence of oxygen leads to reddish brown powder (Iron oxide). This process is called __ of iron.

Which of the following anion is gives a colourless solution?

what would happen if moist blue litmus paper and moist red litmus paper are introduced in the jar of hydrogen

Concentrated hydrochloric acid is __(corrosive / non- corrosive) in nature.

Complete the following equations: (a) CH4+O2⟶ (b) CH2+H5OHHot Conc. H2SO4−−−−−−−−−−−→ (c) CH3COOH+NaOH⟶

What volume of oxygen is required to burn completely a mixture of 22.4 dm3 of methane and 11.2 dm3 of hydrogen into carbon dioxide and steam? Equations of the reactions are given below. (Assume that all volumes are measured at STP). CH4 + 2O2 → CO2 +2H2O 2H2 + O2 → 2H2O

What is the pH range at which are our body functions?

What is the effect of ammonia on wet red litmus paper?

(a) The mass of 5.6 litres fo a certain gas at STP is 12 g. What is the relative molecular mass or molar mass of the gas? (b) Calculate the volume occupied at S.T.P. by 2 moles of SO2

Which of the following elements are required by living organisms for their life processes?

How many grams of oxygen are required for complete combustion of 2 moles of benzene?

How is ethene prepared by: (a) dehydrohalogenation reaction (b) dehydration reaction? Given equations and name the products formed. [2 MARKS]

Which of the following are allotropes of carbon?

If the producers has 100 kcal of energy, how much energy in kcal will be available for tertiary consumers?0.1

What do you see when concentrated sulphuric acid is added to copper sulphate 5-water?

The chemical formula of Cryolite an important mineral of aluminium is:

What happens when SO2 gas is mixed with water?

Isotopes differ in:

The long form of periodic table has

Sulphuric acid can be prepared by reacting Sulphur with

What are the types of acids on the basis of their source?

Will the configuration be E or Z?

How did Mendeleev exactly predict the mass of eka aluminium?

Identify the characteriestics of a chemical reaction.

Calculat the relative molecular masses of : (a) Ammonium chloroplatinate(NH4)2PtCl6 (b) Potassium chlorate, (c) CuSO4.5H2O, (d) (NH4)2SO4 (e) CH3COONa, (f) CHCl3 (g) (NH4)2Cr2O7.

What is the versatile Nature of carbon? Explain.

An aldehyde as well as a ketone can be represented by the same molecular formula, say C3H6O. Write their structures and name them. State the relation between the two in the language of science.

The number of atoms in 62 g of phosphorous if its gram atomic mass is 31 g is .

Write balanced chemical reactions for the following and name the type of reaction – a) Solid lead nitrate is heated b) Quick lime is added to water c) Iron nails are added to a solution of Silver Bromide