15280 + Interview Questions in Chemistry Page 128 InterviewSolution

6351.	Difference between electron affinity and electron gain enthalpy
Answer» Difference between electron affinity and electron gain enthalpy

Discussion

6352.	Define the following terms: Minerals Ores
Answer» Define the following terms: Minerals Ores

Discussion

6353.	Identify the gas that is chemically inert.
Answer» Identify the gas that is chemically inert.

Discussion

6354.	Part (i) to (v) refer to changes in the properties of elements on moving from left to right across a period of the periodic table. For each property, choose the letter corresponding to the correct answer from the choices (a), (b), (c) and (d).(i) The non-metallic character of the elements:(a) decreases(b) increases(c) remains the same(d) depends on the period(ii) The electronegativity:(a) depends on the number of valence electrons(b) remains the same(c) decreases(d) increases(iii) The ionisation potential:(a) goes up and down(b) decreases(c) increases(d) remains the same(iv) The atomic size:(a) decreases(b) increases(c) remains the same(d) sometimes increases and sometimes decreases(v) The electron affinity of the elements in groups 1 to 7:(a) goes up and then down(b) decreases and then increases(c) increases(d) decreases
Answer» Part (i) to (v) refer to changes in the properties of elements on moving from left to right across a period of the periodic table. For each property, choose the letter corresponding to the correct answer from the choices (a), (b), (c) and (d). (i) The non-metallic character of the elements: (a) decreases (b) increases (c) remains the same (d) depends on the period (ii) The electronegativity: (a) depends on the number of valence electrons (b) remains the same (c) decreases (d) increases (iii) The ionisation potential: (a) goes up and down (b) decreases (c) increases (d) remains the same (iv) The atomic size: (a) decreases (b) increases (c) remains the same (d) sometimes increases and sometimes decreases (v) The electron affinity of the elements in groups 1 to 7: (a) goes up and then down (b) decreases and then increases (c) increases (d) decreases

Discussion

6355.	The mass of 6.022 × 1023 molecules of C6H12O6 is:-
Answer» The mass of 6.022 × 1023 molecules of C6H12O6 is:-

Discussion

6356.	Two capacitors }C_1 and }C_2 are charged to }120 V } and }200 V respectively. It is found that by } connecting them together the potential on } each one can be made zero. Then, } (a) }5C_1=3C_2 (b) 3C1=5C2(c) }3C_1+5C_2=0 (d) } 9C_1=4C_2
Answer» Two capacitors }C_1 and }C_2 are charged to }120 V } and }200 V respectively. It is found that by } connecting them together the potential on } each one can be made zero. Then, } (a) }5C_1=3C_2 (b) 3C1=5C2(c) }3C_1+5C_2=0 (d) } 9C_1=4C_2

Discussion

6357.	What is the term used to refer to the relative concentration of a solution? __
Answer» What is the term used to refer to the relative concentration of a solution? __

Discussion

6358.	What are the uses of bleaching powder ?
Answer» What are the uses of bleaching powder ?

Discussion

6359.	A gaseous reaction A2 gives B + 1/2 C shows increase in pressure from 100 mm to 120 mm in 5 minutes.The rate of disappearance of A2 i
Answer» A gaseous reaction A2 gives B + 1/2 C shows increase in pressure from 100 mm to 120 mm in 5 minutes.The rate of disappearance of A2 i

Discussion

6360.	DO WE INCLUDE MASS OF WATER OF CRYSTALLISATION WHILE FINDING MASSES
Answer» DO WE INCLUDE MASS OF WATER OF CRYSTALLISATION WHILE FINDING MASSES

Discussion

6361.	(a) A solution of silver nitrate is a good electrolyte but it is not used for electroplating an article with silver.(b) Identify the following reactions as either oxidation or reduction:(i) O + 2e− → O2−(ii) K − e− → K+(iii) Fe3+ + e− → Fe2+
Answer» (a) A solution of silver nitrate is a good electrolyte but it is not used for electroplating an article with silver. (b) Identify the following reactions as either oxidation or reduction: (i) O + 2e⁻ $\overset{}{\to}$ O²⁻ (ii) K − e⁻ $\overset{}{\to}$ K⁺ (iii) Fe³⁺ + e⁻ $\overset{}{\to}$ Fe²⁺

Discussion

6362.	Number of structural isomers of the molecular formula C4H11N is/are:
Answer» Number of structural isomers of the molecular formula $C_{4} H_{11} N$ is/are:

Discussion

6363.	The pH of 1.0×10−8 M HCl is:(Given, log(1.1)=0.04)
Answer» The $p H$ of $1.0 \times 10^{- 8} M$ $H C l$ is: (Given, $log (1.1) = 0.04$ )

Discussion

6364.	An element A exist in two isotopic forms A15 and A16.if the average atomic mass of A was found to be 15.24.then find the % relative aboundance of A15 will be
Answer» An element A exist in two isotopic forms A15 and A16.if the average atomic mass of A was found to be 15.24.then find the % relative aboundance of A15 will be

Discussion

6365.	Element that acts as ___ always has ___ position in the electrochemical series.
Answer» Element that acts as ___ always has ___ position in the electrochemical series.

Discussion

6366.	What is the relative atomic mass of an element?
Answer» What is the relative atomic mass of an element?

Discussion

6367.	Why are ionic solids have lesser melting point than covalent solids while ionic compounds have higher melting point than covalent compounds ?
Answer» Why are ionic solids have lesser melting point than covalent solids while ionic compounds have higher melting point than covalent compounds ?

Discussion

6368.	Basicity of orthophosphoric acid is:[1 Mark]
Answer» Basicity of orthophosphoric acid is: [1 Mark]

Discussion

6369.	Which size is larger Cu2+ or Zn2+?
Answer» Which size is larger Cu2+ or Zn2+?

Discussion

6370.	The following flow diagram shows the main steps for the manufacture of sulphuric acid by the Contact Process. (a) Name a substance other than sulphur that would react with dry air on heating to form sulphur dioxide. (b) Write the equation for the reaction taking place in the catalytic converter. (c) The sulphur trioxide is absorbed in 98% sulphuric acid and not in water. Give a reason for this and write the equation taking place here. (d) What is added to change oleum into sulphuric acid? [5 MARKS]
Answer» The following flow diagram shows the main steps for the manufacture of sulphuric acid by the Contact Process. (a) Name a substance other than sulphur that would react with dry air on heating to form sulphur dioxide. (b) Write the equation for the reaction taking place in the catalytic converter. (c) The sulphur trioxide is absorbed in $98 %$ sulphuric acid and not in water. Give a reason for this and write the equation taking place here. (d) What is added to change oleum into sulphuric acid? [5 MARKS]

Discussion

6371.	7. Is peptization a process of converting a precipitate or a clear solution again into a colloidal solution? Or do they mean the same thing?
Answer» 7. Is peptization a process of converting a precipitate or a clear solution again into a colloidal solution? Or do they mean the same thing?

Discussion

6372.	Which of the following options correctly represents the bond formed between hydrogen and chlorine in HCl?
Answer» Which of the following options correctly represents the bond formed between hydrogen and chlorine in $H C l$ ?

Discussion

6373.	Soaps are prepared by alkaline hydrolysis of _______.
Answer» Soaps are prepared by alkaline hydrolysis of _______.

Discussion

6374.	Which of the following occurs in a Cu−Zn cell?
Answer» Which of the following occurs in a $C u - Z n$ cell?

Discussion

6375.	Which of the following violates Hund's rule?
Answer» Which of the following violates Hund's rule?

Discussion

6376.	Arrange the reactivity order of Na, Mg, Fe based on the reaction with water.
Answer» Arrange the reactivity order of Na, Mg, Fe based on the reaction with water.

Discussion

6377.	Mr. Girdhari Lal does not keep full double entry records. His Balance as on 1st January, 2016 is as follows: Capital and LiabilitiesAmt. (Rs.)AssetsAmt. (Rs.)Sundry Creditors35,000Cash in Hand5,000Bills Payable15,000Cash at Bank20,000Capital40,000Sundry Debtors 18,000Stock22,000Furniture8,000Plant17,000¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯90,000––––––––––––––––¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯90,000–––––––––––––––– His position at the end of the year is ItemsAmt. (Rs.)Cash in Hand7,000Stock8,600Debtors23,800Furniture15,000Plant20,350Bills Payable20,200Creditors15,000 He withdrew Rs. 500 per month out of which he spent Rs. 1,500 for business purpose. Prepare the statement of profit or loss.
Answer» Mr. Girdhari Lal does not keep full double entry records. His Balance as on 1st January, 2016 is as follows: $\begin{matrix} Capital and Liabilities & Amt. (Rs.) & Assets & Amt. (Rs.) Sundry Creditors & 35, 000 & Cash in Hand & 5, 000 Bills Payable & 15, 000 & Cash at Bank & 20, 000 Capital & 40, 000 & Sundry Debtors & 18, 000 Stock & 22, 000 Furniture & 8, 000 Plant & 17, 000 ¯ ¯¯¯¯¯¯¯¯¯¯¯¯¯¯ ¯ 90, 000 - ------ - - ------ - & ¯ ¯¯¯¯¯¯¯¯¯¯¯¯¯¯ ¯ 90, 000 - ------ - - ------ - \end{matrix}$ His position at the end of the year is $\begin{matrix} Items & Amt. (Rs.) Cash in Hand & 7, 000 Stock & 8, 600 Debtors & 23, 800 Furniture & 15, 000 Plant & 20, 350 Bills Payable & 20, 200 Creditors & 15, 000 \end{matrix}$ He withdrew Rs. 500 per month out of which he spent Rs. 1,500 for business purpose. Prepare the statement of profit or loss.

6377.

Mr. Girdhari Lal does not keep full double entry records. His Balance as on 1st January, 2016 is as follows: Capital and LiabilitiesAmt. (Rs.)AssetsAmt. (Rs.)Sundry Creditors35,000Cash in Hand5,000Bills Payable15,000Cash at Bank20,000Capital40,000Sundry Debtors 18,000Stock22,000Furniture8,000Plant17,000¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯90,000––––––––––––––––¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯90,000–––––––––––––––– His position at the end of the year is ItemsAmt. (Rs.)Cash in Hand7,000Stock8,600Debtors23,800Furniture15,000Plant20,350Bills Payable20,200Creditors15,000 He withdrew Rs. 500 per month out of which he spent Rs. 1,500 for business purpose. Prepare the statement of profit or loss.

Answer»

Mr. Girdhari Lal does not keep full double entry records. His Balance as on 1st January, 2016 is as follows:

$\begin{matrix} Capital and Liabilities & Amt. (Rs.) & Assets & Amt. (Rs.) Sundry Creditors & 35, 000 & Cash in Hand & 5, 000 Bills Payable & 15, 000 & Cash at Bank & 20, 000 Capital & 40, 000 & Sundry Debtors & 18, 000 Stock & 22, 000 Furniture & 8, 000 Plant & 17, 000 ¯ ¯¯¯¯¯¯¯¯¯¯¯¯¯¯ ¯ 90, 000 - ------ - - ------ - & ¯ ¯¯¯¯¯¯¯¯¯¯¯¯¯¯ ¯ 90, 000 - ------ - - ------ - \end{matrix}$

His position at the end of the year is

$\begin{matrix} Items & Amt. (Rs.) Cash in Hand & 7, 000 Stock & 8, 600 Debtors & 23, 800 Furniture & 15, 000 Plant & 20, 350 Bills Payable & 20, 200 Creditors & 15, 000 \end{matrix}$

He withdrew Rs. 500 per month out of which he spent Rs. 1,500 for business purpose. Prepare the statement of profit or loss.

Discussion

6378.	The gas obtained when coal is distilled is
Answer» The gas obtained when coal is distilled is

Discussion

6379.	Is it possible to have combustion without oxygen? __
Answer» Is it possible to have combustion without oxygen? __

Discussion

6380.	Carbonic acid gives an acid salt but hydrochloric acid does not. Explain
Answer» Carbonic acid gives an acid salt but hydrochloric acid does not. Explain

Discussion

6381.	Which of the following ion will move at the cathode when molten lead bromide is used as an electrolyte?
Answer» Which of the following ion will move at the cathode when molten lead bromide is used as an electrolyte?

Discussion

6382.	How does a metal react with acid?
Answer» How does a metal react with acid?

Discussion

6383.	Give the trivial (common) names and the IUPAC names of the following : (a) C3H6, (b) C2H4, (c) C2H2, (d) CH3OH, (e) C2H5OH.
Answer» Give the trivial (common) names and the IUPAC names of the following : (a) $C_{3} H_{6}$ , (b) $C_{2} H_{4}$ , (c) $C_{2} H_{2}$ , (d) $C H_{3} O H$ , (e) $C_{2} H_{5} O H$ .

6383.

Give the trivial (common) names and the IUPAC names of the following : (a) C3H6, (b) C2H4, (c) C2H2, (d) CH3OH, (e) C2H5OH.

Answer»

Give the trivial (common) names and the IUPAC names of the following :
(a) $C_{3} H_{6}$ ,

(b) $C_{2} H_{4}$ ,
(c) $C_{2} H_{2}$ ,

(d) $C H_{3} O H$ ,
(e) $C_{2} H_{5} O H$ .

Discussion

6384.	46.compare C-N BOND in terms of length in 2-iodo 1,3,5 trinitro benzene and explain ?
Answer» 46.compare C-N BOND in terms of length in 2-iodo 1,3,5 trinitro benzene and explain ?

Discussion

6385.	a gas at 350 k and 15 bar has molar volume 20percent smaller than that for an ideal gas under the same condion, the z is?? which force is dominant?
Answer» a gas at 350 k and 15 bar has molar volume 20percent smaller than that for an ideal gas under the same condion, the z is?? which force is dominant?

Discussion

6386.	Pure water boils at 373 k and pure nitric acid boils at 359 K the azeotropic mixture of water and nitric acid boils at T K. T=??
Answer» Pure water boils at 373 k and pure nitric acid boils at 359 K the azeotropic mixture of water and nitric acid boils at T K. T=??

Discussion

6387.	What would you observe in the following cases?(i) Sodium and potassium are placed in cold water.(ii) Burning magnesium is introduced into steam.(iii) Copper hydroxide is heated.(iv) Potassium nitrate is heated strongly.(v) Copper nitrate is heated strongly.(vi) Mercuric nitrate is heated strongly.
Answer» What would you observe in the following cases? (i) Sodium and potassium are placed in cold water. (ii) Burning magnesium is introduced into steam. (iii) Copper hydroxide is heated. (iv) Potassium nitrate is heated strongly. (v) Copper nitrate is heated strongly. (vi) Mercuric nitrate is heated strongly.

Discussion

6388.	In a hypothetical atom, the number of electrons inshell and subshell are x and y, respectively, whereeach electron has three possible spin states repre-sented as s +1/2,-1/2 and 0.Then the value of x + y is(A) 2n^2+ 4l+2(B) 3n^2+ 3l + 1(C) 3n^2 + 6l +3(D) 6n^{} +3l +3
Answer» In a hypothetical atom, the number of electrons inshell and subshell are x and y, respectively, whereeach electron has three possible spin states repre-sented as s +1/2,-1/2 and 0.Then the value of x + y is(A) 2n^2+ 4l+2(B) 3n^2+ 3l + 1(C) 3n^2 + 6l +3(D) 6n^{} +3l +3

Discussion

6389.	The pH of water admitted into a treatment plant was 6.0 in the morning. Consequent to inflow of raw water from a different source, it changed to 8.0 in the next 24 hours. Assuming linear variation in time of the hydrogen concentration, the time mean pH value of the water over this 24 hour period is____6.296
Answer» The pH of water admitted into a treatment plant was 6.0 in the morning. Consequent to inflow of raw water from a different source, it changed to 8.0 in the next 24 hours. Assuming linear variation in time of the hydrogen concentration, the time mean pH value of the water over this 24 hour period is____ 6.296

Discussion

6390.	Draw the sterio structure of OSF2 molecule.
Answer» Draw the sterio structure of OSF2 molecule.

Discussion

6391.	Equal volume of N2 and H2 react to form ammonia under suitable condition then the limiting reagent
Answer» Equal volume of N2 and H2 react to form ammonia under suitable condition then the limiting reagent

Discussion

6392.	colour of lead nitrate and lead oxide
Answer» colour of lead nitrate and lead oxide

Discussion

6393.	(a) What must be added to sodium chloride to prepare hydrogen chloride?(b) Write the equation for the reaction which takes place in question (a).(c) What will you observe, when hydrogen chloride mixes with ammonia?
Answer» (a) What must be added to sodium chloride to prepare hydrogen chloride? (b) Write the equation for the reaction which takes place in question (a). (c) What will you observe, when hydrogen chloride mixes with ammonia?

Discussion

6394.	If pressure becomes double at the same absolute temperature on 2 L of CO2, then what will be the final volume of CO2?
Answer» If pressure becomes double at the same absolute temperature on $2 L$ of $C O_{2}$ , then what will be the final volume of $C O_{2}$ ?

Discussion

6395.	The property of catenation is more marked in case of _________.
Answer» The property of catenation is more marked in case of _________.

Discussion

6396.	The common impurities present in bauxite ore are ________
Answer» The common impurities present in bauxite ore are ________

Discussion

6397.	Which of the following defines a process in which an atom or an ion loses electron(s)?
Answer» Which of the following defines a process in which an atom or an ion loses electron(s)?

Discussion

6398.	What is modern periodic law??
Answer» What is modern periodic law??

Discussion

6399.	What happens when phenyl reacts with metal atoms
Answer» What happens when phenyl reacts with metal atoms

Discussion

6400.	Choose the CORRECT Statements (s) from the following and also give a reason.Statement1 : Melting of candle wax is a physical Change and the melted wax can again be obtained as solid wax upon the removal of heat.Statement 2: Burning of candle wick is a chemical change and the wick cannot be obtained back in its original form.
Answer» Choose the CORRECT Statements (s) from the following and also give a reason. Statement1 : Melting of candle wax is a physical Change and the melted wax can again be obtained as solid wax upon the removal of heat. Statement 2: Burning of candle wick is a chemical change and the wick cannot be obtained back in its original form.

Discussion

Explore topic-wise InterviewSolutions in .

Difference between electron affinity and electron gain enthalpy

Define the following terms: Minerals Ores

Identify the gas that is chemically inert.

The mass of 6.022 × 1023 molecules of C6H12O6 is:-

Two capacitors }C_1 and }C_2 are charged to }120 V } and }200 V respectively. It is found that by } connecting them together the potential on } each one can be made zero. Then, } (a) }5C_1=3C_2 (b) 3C1=5C2(c) }3C_1+5C_2=0 (d) } 9C_1=4C_2

What is the term used to refer to the relative concentration of a solution? __

What are the uses of bleaching powder ?

A gaseous reaction A2 gives B + 1/2 C shows increase in pressure from 100 mm to 120 mm in 5 minutes.The rate of disappearance of A2 i

DO WE INCLUDE MASS OF WATER OF CRYSTALLISATION WHILE FINDING MASSES

(a) A solution of silver nitrate is a good electrolyte but it is not used for electroplating an article with silver.(b) Identify the following reactions as either oxidation or reduction:(i) O + 2e− → O2−(ii) K − e− → K+(iii) Fe3+ + e− → Fe2+

Number of structural isomers of the molecular formula C4H11N is/are:

The pH of 1.0×10−8 M HCl is:(Given, log(1.1)=0.04)

An element A exist in two isotopic forms A15 and A16.if the average atomic mass of A was found to be 15.24.then find the % relative aboundance of A15 will be

Element that acts as ___ always has ___ position in the electrochemical series.

What is the relative atomic mass of an element?

Why are ionic solids have lesser melting point than covalent solids while ionic compounds have higher melting point than covalent compounds ?

Basicity of orthophosphoric acid is:[1 Mark]

Which size is larger Cu2+ or Zn2+?

7. Is peptization a process of converting a precipitate or a clear solution again into a colloidal solution? Or do they mean the same thing?

Which of the following options correctly represents the bond formed between hydrogen and chlorine in HCl?

Soaps are prepared by alkaline hydrolysis of _______.

Which of the following occurs in a Cu−Zn cell?

Which of the following violates Hund's rule?

Arrange the reactivity order of Na, Mg, Fe based on the reaction with water.

The gas obtained when coal is distilled is

Is it possible to have combustion without oxygen? __

Carbonic acid gives an acid salt but hydrochloric acid does not. Explain

Which of the following ion will move at the cathode when molten lead bromide is used as an electrolyte?

How does a metal react with acid?

Give the trivial (common) names and the IUPAC names of the following : (a) C3H6, (b) C2H4, (c) C2H2, (d) CH3OH, (e) C2H5OH.

46.compare C-N BOND in terms of length in 2-iodo 1,3,5 trinitro benzene and explain ?

a gas at 350 k and 15 bar has molar volume 20percent smaller than that for an ideal gas under the same condion, the z is?? which force is dominant?

Pure water boils at 373 k and pure nitric acid boils at 359 K the azeotropic mixture of water and nitric acid boils at T K. T=??

What would you observe in the following cases?(i) Sodium and potassium are placed in cold water.(ii) Burning magnesium is introduced into steam.(iii) Copper hydroxide is heated.(iv) Potassium nitrate is heated strongly.(v) Copper nitrate is heated strongly.(vi) Mercuric nitrate is heated strongly.

In a hypothetical atom, the number of electrons inshell and subshell are x and y, respectively, whereeach electron has three possible spin states repre-sented as s +1/2,-1/2 and 0.Then the value of x + y is(A) 2n^2+ 4l+2(B) 3n^2+ 3l + 1(C) 3n^2 + 6l +3(D) 6n^{} +3l +3

Draw the sterio structure of OSF2 molecule.

Equal volume of N2 and H2 react to form ammonia under suitable condition then the limiting reagent

colour of lead nitrate and lead oxide

(a) What must be added to sodium chloride to prepare hydrogen chloride?(b) Write the equation for the reaction which takes place in question (a).(c) What will you observe, when hydrogen chloride mixes with ammonia?

If pressure becomes double at the same absolute temperature on 2 L of CO2, then what will be the final volume of CO2?

The property of catenation is more marked in case of _________.

The common impurities present in bauxite ore are ________

Which of the following defines a process in which an atom or an ion loses electron(s)?

What is modern periodic law??

What happens when phenyl reacts with metal atoms

Element that acts as _ always has _ position in the electrochemical series.