15280 + Interview Questions in Chemistry Page 23 InterviewSolution

1101.	12. Calculate volume of oxygen require to burn 10 gram of ethane
Answer» 12. Calculate volume of oxygen require to burn 10 gram of ethane

Discussion

1102.	73. If an element shows two ionic states +2 and +3 and form oxides in such a way that ratio of the elements showing +2 and +3 state is 1 : 3. in a compound. Formula of the compound will be:
Answer» 73. If an element shows two ionic states +2 and +3 and form oxides in such a way that ratio of the elements showing +2 and +3 state is 1 : 3. in a compound. Formula of the compound will be:

Discussion

1103.	Give three distinct tests [apart from using an indicator] you would carry out with solution of HC1 to illustrate the typical properties of an acid.
Answer» Give three distinct tests [apart from using an indicator] you would carry out with solution of HC1 to illustrate the typical properties of an acid.

Discussion

1104.	How can we increase the amount of carbon dioxide dissolved in water?
Answer» How can we increase the amount of carbon dioxide dissolved in water?

Discussion

1105.	Which word pair exhibits similar relationship to the given pair? Mighty - Unprecedented
Answer» Which word pair exhibits similar relationship to the given pair? Mighty - Unprecedented

Discussion

1106.	What are the characteristics of covalent compounds.
Answer» What are the characteristics of covalent compounds.

Discussion

1107.	What equivalent of a salt signifies or shows ?
Answer» What equivalent of a salt signifies or shows ?

Discussion

1108.	Is sulphur mobile element or immobile element??
Answer» Is sulphur mobile element or immobile element??

Discussion

1109.	Given below are some statements contrasting Hydrometallurgy and pyrometallurgy. Which of the following are the advantages of Hydrometallurgy (leaching)?
Answer» Given below are some statements contrasting Hydrometallurgy and pyrometallurgy. Which of the following are the advantages of Hydrometallurgy (leaching)?

Discussion

1110.	___ are substances that fasten the rate of a reaction without undergoing any permanent change themselves.
Answer» ___ are substances that fasten the rate of a reaction without undergoing any permanent change themselves.

Discussion

1111.	Solution A is a sodium hydroxide solution. Solution B is a weak acid. C is dilute sulphuric acid. Which solution will(i) liberate sulphur dioxide from sodium sulphite,(ii) give a white precipitate with zinc sulphate solution,(iii) contain solute molecules and ions?
Answer» Solution A is a sodium hydroxide solution. Solution B is a weak acid. C is dilute sulphuric acid. Which solution will (i) liberate sulphur dioxide from sodium sulphite, (ii) give a white precipitate with zinc sulphate solution, (iii) contain solute molecules and ions?

Discussion

1112.	What would be the colour of litmus in a solution of sodium carbonate ?
Answer» What would be the colour of litmus in a solution of sodium carbonate ?

Discussion

1113.	(a) What are hydrocarbons? Give examples.(b) Give the structural difference between saturated and unsaturated hydrocarbons with two examples of each.(c) What is a functional group? Give examples of four different functional groups.
Answer» (a) What are hydrocarbons? Give examples. (b) Give the structural difference between saturated and unsaturated hydrocarbons with two examples of each. (c) What is a functional group? Give examples of four different functional groups.

Discussion

1114.	How to find out reactivity order of non metal with salt solution
Answer» How to find out reactivity order of non metal with salt solution

Discussion

1115.	Which of the following is the correct order of ionisation energy?
Answer» Which of the following is the correct order of ionisation energy?

Discussion

1116.	What is mol in Avogadro's gas law
Answer» What is mol in Avogadro's gas law

Discussion

1117.	Give balanced equations to prove that ammonia(a) is alkaline in nature.(b) has the element hydrogen in it.(c) has the element nitrogen in it.
Answer» Give balanced equations to prove that ammonia (a) is alkaline in nature. (b) has the element hydrogen in it. (c) has the element nitrogen in it.

Discussion

1118.	Write the equation for the dissociation of hydrochloric acid (HCl) in water.
Answer» Write the equation for the dissociation of hydrochloric acid (HCl) in water.

Discussion

1119.	Give the name of a soluble lead salt and write the equation for the action of heat on this salt. Write the equation for the preparation of nitric acid from potassium nitrate.
Answer» Give the name of a soluble lead salt and write the equation for the action of heat on this salt. Write the equation for the preparation of nitric acid from potassium nitrate.

Discussion

1120.	Complete the reaction Na2S+2HCl→2NaCl+ ______
Answer» Complete the reaction $N a_{2} S + 2 H C l \to 2 N a C l +$ ______

1120.

Complete the reaction Na2S+2HCl→2NaCl+ ______

Answer»

Complete the reaction

$N a_{2} S + 2 H C l \to 2 N a C l +$ ______

Discussion

1121.	In order to carry out the decomposition reaction of water, a student passes electric current from a battery through water containing a few drops of dilute sulphuric acid. In this process, two volume of gas X are collected in a test-tube inverted over cathode (negative electrode) whereas one volume of gas Y is collected in the test-tube inverted over anode (positive electrode).(a) Why do we add a few drops of dilute sulphuric acid to water before passing electric current?(b) Name the gas X.(c) Name the gas Y.(d) What does this decomposition reaction tell us about the composition of water?
Answer» In order to carry out the decomposition reaction of water, a student passes electric current from a battery through water containing a few drops of dilute sulphuric acid. In this process, two volume of gas X are collected in a test-tube inverted over cathode (negative electrode) whereas one volume of gas Y is collected in the test-tube inverted over anode (positive electrode). (a) Why do we add a few drops of dilute sulphuric acid to water before passing electric current? (b) Name the gas X. (c) Name the gas Y. (d) What does this decomposition reaction tell us about the composition of water?

Discussion

1122.	what does the term 'sodium salt of acid' mean ??
Answer» what does the term 'sodium salt of acid' mean ??

Discussion

1123.	9. the metal which does not form Ammonium Nitrate by reaction with very dilute nitric acid is Zn Fe Sn Mg
Answer» 9. the metal which does not form Ammonium Nitrate by reaction with very dilute nitric acid is Zn Fe Sn Mg

Discussion

1124.	Give a balanced equation for the lab. preparation of ethylene. How is the gas collected?
Answer» Give a balanced equation for the lab. preparation of ethylene. How is the gas collected?

Discussion

1125.	Identify the type of components of our environment shown in these figures:
Answer» Identify the type of components of our environment shown in these figures:

Discussion

1126.	C7H9N has how many isomeric forms that contain a benzene ring?
Answer» $C_{7} H_{9} N$ has how many isomeric forms that contain a benzene ring?

Discussion

1127.	Consider the given chemical reaction2NaOH+Zn→The products of the above reaction are
Answer» Consider the given chemical reaction $2 N a O H + Z n \to$ The products of the above reaction are

Discussion

1128.	A compound contains equal masses of the elements A, B & C. If the gram atomic masses of A, B & C are 20 g, 40 g & 60 g respectively. Determine the molecular formula of the compound if molecular mass is 720 g.
Answer» A compound contains equal masses of the elements A, B & C. If the gram atomic masses of A, B & C are 20 g, 40 g & 60 g respectively. Determine the molecular formula of the compound if molecular mass is 720 g.

Discussion

1129.	63 Vander Waals constant b for oxygen is xL/mole . What is the volume of single Oxygen molecule. 1)x/4 2)4/x 3)x/4NA 4)xNA/4
Answer» 63 Vander Waals constant b for oxygen is xL/mole . What is the volume of single Oxygen molecule. 1)x/4 2)4/x 3)x/4NA 4)xNA/4

Discussion

1130.	6. Action of sulphuric acid on a metal sulphite with observation and the product details
Answer» 6. Action of sulphuric acid on a metal sulphite with observation and the product details

Discussion

1131.	34.Compound A C8H9Br gives a white precipitate when warmed with alcoholic AgNO3 oxidation of A give an acid B C8H6O4 (B) easily form anhydride on heating identify compound A
Answer» 34.Compound A C8H9Br gives a white precipitate when warmed with alcoholic AgNO3 oxidation of A give an acid B C8H6O4 (B) easily form anhydride on heating identify compound A

Discussion

1132.	Copper is preferred over other metals for making calorimeters because:
Answer» Copper is preferred over other metals for making calorimeters because:

Discussion

1133.	The reaction in which heat is liberated is called as _____________ reaction.
Answer» The reaction in which heat is liberated is called as _____________ reaction.

Discussion

1134.	Two elements A and B contain 13 and 8 proton respectively. If the number of neutrons in them happen to be 14 and 8 respectively, the formula unit mass for the compound between A and B unit would b
Answer» Two elements A and B contain 13 and 8 proton respectively. If the number of neutrons in them happen to be 14 and 8 respectively, the formula unit mass for the compound between A and B unit would b

Discussion

1135.	55. For a gaseous reaction 2A + B_2 -> 2AB , the following rate data were obtained at 300K rate of Concentration disappearance of B_2 (Mole/lt.min) \lbrack A\rbrack \lbrack B_2\rbrack (i) 1.8×10-3 0.015 0.15 (ii) 1.08×10-2 0.09 0.15 (iii) 5.4×10-3 0.015 0.45 Calculate the rate constant and rate of formation of AB when \lbrack A\rbrack is 0.02 and \lbrack B_2\rbrack is 0.04 mol/lt.min at 300K.
Answer» 55. For a gaseous reaction 2A + B_2 -> 2AB , the following rate data were obtained at 300K rate of Concentration disappearance of B_2 (Mole/lt.min) \lbrack A\rbrack \lbrack B_2\rbrack (i) 1.8×10-3 0.015 0.15 (ii) 1.08×10-2 0.09 0.15 (iii) 5.4×10-3 0.015 0.45 Calculate the rate constant and rate of formation of AB when \lbrack A\rbrack is 0.02 and \lbrack B_2\rbrack is 0.04 mol/lt.min at 300K.

Discussion

1136.	A solution of caustic soda (NaOH) in water or when fused, conducts an electric current. What is the similarity in these two cases?
Answer» A solution of caustic soda (NaOH) in water or when fused, conducts an electric current. What is the similarity in these two cases?

Discussion

1137.	(a) Why common salt gets wet during rainy season?(b) Give four substances which contain water of crystallisation and write their common name.
Answer» (a) Why common salt gets wet during rainy season? (b) Give four substances which contain water of crystallisation and write their common name.

Discussion

1138.	if α is the degree of dissociation of weak dibasic organic acid and y is the hydrogen ion concentration, what is the initial concentration of acid
Answer» if α is the degree of dissociation of weak dibasic organic acid and y is the hydrogen ion concentration, what is the initial concentration of acid

Discussion

1139.	What happens to number of valence electrons in atoms of elements as we go down a group of the periodic table ?
Answer» What happens to number of valence electrons in atoms of elements as we go down a group of the periodic table ?

Discussion

1140.	4. Prepare a list of objects around you that are electroplated.
Answer» 4. Prepare a list of objects around you that are electroplated.

Discussion

1141.	(i) What is special feature of the apparatus that is used in the laboratory preparation of nitric acid?(ii) Why should the temperature of the reaction mixture of nitric acid not be allowed to rise above 200°C?
Answer» (i) What is special feature of the apparatus that is used in the laboratory preparation of nitric acid? (ii) Why should the temperature of the reaction mixture of nitric acid not be allowed to rise above 200°C?

Discussion

1142.	What is meant by ionization potential?
Answer» What is meant by ionization potential?

Discussion

1143.	Give the nature of A and B in the given reaction. BKMnO4←−−−−−H+(CH3)3COHKMnO4/OH−−−−−−−−−−→A
Answer» Give the nature of A and B in the given reaction. $B K M n O_{4} \leftarrow ---- - H^{+} (C H_{3})_{3} C O H K M n O_{4} / O H^{-} - -------- \to A$

Discussion

1144.	calculate number of moles of 10g of hydrogen and 64 g oxygen.also find limiting reagent when hydrogen and oxygen reacts to give water
Answer» calculate number of moles of 10g of hydrogen and 64 g oxygen.also find limiting reagent when hydrogen and oxygen reacts to give water

Discussion

1145.	Which of the following is not a natural indicator?
Answer» Which of the following is not a natural indicator?

Discussion

1146.	Nommez :1. deux vins français2. deux fromages français3. la ville capitale de la France
Answer» Nommez : 1. deux vins français 2. deux fromages français 3. la ville capitale de la France

Discussion

1147.	Which type of utility is applicable when a carpenter makes furniture from wooden logs?
Answer» Which type of utility is applicable when a carpenter makes furniture from wooden logs?

Discussion

1148.	Write the names of elements from the following symbols :Zn , Cd, Xe, Br, Ti, Cu, Fe, Si, Ir, Pt.
Answer» Write the names of elements from the following symbols : Zn , Cd, Xe, Br, Ti, Cu, Fe, Si, Ir, Pt.

Discussion

1149.

Copy and complete the following table which relates to three homologous series of hydrocarbons: General Formulae CnH2n CnH2n − 2 CnH2n + 2 IUPAC name of the homologous series Characteristic bond type Single bone IUPAC name of the first member of the series Type of reaction with chlorine Addition

Answer» Copy and complete the following table which relates to three homologous series of hydrocarbons:

General Formulae	C_nH_2n	C_nH_2n_{− 2}	C_nH_2n_{+ 2}
IUPAC name of the homologous series
Characteristic bond type			Single bone
IUPAC name of the first member of the series
Type of reaction with chlorine		Addition

Discussion

1150.	Moles of KCLO3 required for producing sufficient O2 to react with 1 mole of aluminium will be
Answer» Moles of KCLO3 required for producing sufficient O2 to react with 1 mole of aluminium will be

Discussion

Explore topic-wise InterviewSolutions in .

12. Calculate volume of oxygen require to burn 10 gram of ethane

73. If an element shows two ionic states +2 and +3 and form oxides in such a way that ratio of the elements showing +2 and +3 state is 1 : 3. in a compound. Formula of the compound will be:

Give three distinct tests [apart from using an indicator] you would carry out with solution of HC1 to illustrate the typical properties of an acid.

How can we increase the amount of carbon dioxide dissolved in water?

Which word pair exhibits similar relationship to the given pair? Mighty - Unprecedented

What are the characteristics of covalent compounds.

What equivalent of a salt signifies or shows ?

Is sulphur mobile element or immobile element??

Given below are some statements contrasting Hydrometallurgy and pyrometallurgy. Which of the following are the advantages of Hydrometallurgy (leaching)?

___ are substances that fasten the rate of a reaction without undergoing any permanent change themselves.

Solution A is a sodium hydroxide solution. Solution B is a weak acid. C is dilute sulphuric acid. Which solution will(i) liberate sulphur dioxide from sodium sulphite,(ii) give a white precipitate with zinc sulphate solution,(iii) contain solute molecules and ions?

What would be the colour of litmus in a solution of sodium carbonate ?

(a) What are hydrocarbons? Give examples.(b) Give the structural difference between saturated and unsaturated hydrocarbons with two examples of each.(c) What is a functional group? Give examples of four different functional groups.

How to find out reactivity order of non metal with salt solution

Which of the following is the correct order of ionisation energy?

What is mol in Avogadro's gas law

Give balanced equations to prove that ammonia(a) is alkaline in nature.(b) has the element hydrogen in it.(c) has the element nitrogen in it.

Write the equation for the dissociation of hydrochloric acid (HCl) in water.

Give the name of a soluble lead salt and write the equation for the action of heat on this salt. Write the equation for the preparation of nitric acid from potassium nitrate.

Complete the reaction Na2S+2HCl→2NaCl+ ______

what does the term 'sodium salt of acid' mean ??

9. the metal which does not form Ammonium Nitrate by reaction with very dilute nitric acid is Zn Fe Sn Mg

Give a balanced equation for the lab. preparation of ethylene. How is the gas collected?

Identify the type of components of our environment shown in these figures:

C7H9N has how many isomeric forms that contain a benzene ring?

Consider the given chemical reaction2NaOH+Zn→The products of the above reaction are

A compound contains equal masses of the elements A, B &amp; C. If the gram atomic masses of A, B &amp; C are 20 g, 40 g &amp; 60 g respectively. Determine the molecular formula of the compound if molecular mass is 720 g.

63 Vander Waals constant b for oxygen is xL/mole . What is the volume of single Oxygen molecule. 1)x/4 2)4/x 3)x/4NA 4)xNA/4

6. Action of sulphuric acid on a metal sulphite with observation and the product details

34.Compound A C8H9Br gives a white precipitate when warmed with alcoholic AgNO3 oxidation of A give an acid B C8H6O4 (B) easily form anhydride on heating identify compound A

Copper is preferred over other metals for making calorimeters because:

The reaction in which heat is liberated is called as _____________ reaction.

Two elements A and B contain 13 and 8 proton respectively. If the number of neutrons in them happen to be 14 and 8 respectively, the formula unit mass for the compound between A and B unit would b

A solution of caustic soda (NaOH) in water or when fused, conducts an electric current. What is the similarity in these two cases?

(a) Why common salt gets wet during rainy season?(b) Give four substances which contain water of crystallisation and write their common name.

if α is the degree of dissociation of weak dibasic organic acid and y is the hydrogen ion concentration, what is the initial concentration of acid

What happens to number of valence electrons in atoms of elements as we go down a group of the periodic table ?

4. Prepare a list of objects around you that are electroplated.

(i) What is special feature of the apparatus that is used in the laboratory preparation of nitric acid?(ii) Why should the temperature of the reaction mixture of nitric acid not be allowed to rise above 200°C?

What is meant by ionization potential?

Give the nature of A and B in the given reaction. BKMnO4←−−−−−H+(CH3)3COHKMnO4/OH−−−−−−−−−−→A

calculate number of moles of 10g of hydrogen and 64 g oxygen.also find limiting reagent when hydrogen and oxygen reacts to give water

Which of the following is not a natural indicator?

Nommez :1. deux vins français2. deux fromages français3. la ville capitale de la France

Which type of utility is applicable when a carpenter makes furniture from wooden logs?

Write the names of elements from the following symbols :Zn , Cd, Xe, Br, Ti, Cu, Fe, Si, Ir, Pt.

Copy and complete the following table which relates to three homologous series of hydrocarbons: General Formulae CnH2n CnH2n − 2 CnH2n + 2 IUPAC name of the homologous series Characteristic bond type Single bone IUPAC name of the first member of the series Type of reaction with chlorine Addition

Moles of KCLO3 required for producing sufficient O2 to react with 1 mole of aluminium will be

A compound contains equal masses of the elements A, B & C. If the gram atomic masses of A, B & C are 20 g, 40 g & 60 g respectively. Determine the molecular formula of the compound if molecular mass is 720 g.