46295 + Interview Questions in Chemistry

1.	A closed soda can has the concentration of CO2at25∘C equal to 0.408 m. Thus, the pressure of CO2 gas in the can is (KH=0.034kg mol−1bar)
Answer» A closed soda can has the concentration of ${CO}_{2} at 25^{\circ} C$ equal to $0.408 m$ . Thus, the pressure of ${CO}_{2}$ gas in the can is $(K_{H} = 0.034 k g m o l^{- 1} b a r)$

Discussion

2.	Carbocation is Lewis acid? Does a Lewis acid require full one orbital empty? Does a Lewis base require full one orbital filled?
Answer» Carbocation is Lewis acid? Does a Lewis acid require full one orbital empty? Does a Lewis base require full one orbital filled?

Discussion

3.	40. if 11. 2 litre of Methane and 22. 4 litre of Ethane at STP are mixed then find the vapour density and average molecular weight of the mixture
Answer» 40. if 11. 2 litre of Methane and 22. 4 litre of Ethane at STP are mixed then find the vapour density and average molecular weight of the mixture

Discussion

4.	what is law of definite proportions?
Answer» what is law of definite proportions?

Discussion

5.	The correct order of o-o bond length inO2,h2o2 and o3 is
Answer» The correct order of o-o bond length in O2,h2o2 and o3 is

Discussion

6.	Which of the following are isoelectronic with one another
Answer» Which of the following are isoelectronic with one another

6.

Which of the following are isoelectronic with one another

Answer»

Which of the following are isoelectronic with one another

Discussion

7.	Aqueous solution of which of following compounds turns red litmus to blue(1)CO2(2)MgO(3)SO2(4)SO3
Answer» Aqueous solution of which of following compounds turns red litmus to blue (1)CO2 (2)MgO (3)SO2 (4)SO3

Discussion

8.	The reaction A+ B=C+D( revesible reaction) is studied in a one litre vessel at 250^° C. The inital concentration of A was 3n and that of B was n . When equilibrum was attained , equilibrum concentration of C was found to be equal to the concentration of B. What is the concentration of D at equilibrum
Answer» The reaction A+ B=C+D( revesible reaction) is studied in a one litre vessel at 250^° C. The inital concentration of A was 3n and that of B was n . When equilibrum was attained , equilibrum concentration of C was found to be equal to the concentration of B. What is the concentration of D at equilibrum

Discussion

9.	Every atom is made of electron, proton and neutron only. So why is everything different color? There must be present inside the electrons, protons and neutrons which gives the atom its color. Am I correct?
Answer» Every atom is made of electron, proton and neutron only. So why is everything different color? There must be present inside the electrons, protons and neutrons which gives the atom its color. Am I correct?

Discussion

10.	A balloon is filled with hydrogen at room temperature. It will burst if the pressure exceeds 5 bar. If at 1 bar pressure the gas occupies 2.5 L, upto what volume can the balloon be compressed?
Answer» A balloon is filled with hydrogen at room temperature. It will burst if the pressure exceeds $5 bar$ . If at $1 bar$ pressure the gas occupies $2.5 L$ , upto what volume can the balloon be compressed?

Discussion

11.	Arrange the given free radicles in increasing order of stability --1. Secondary free radicle2. Tertiary free radicle3. Allylic free radicleWhy tertiary comes before allylic ??
Answer» Arrange the given free radicles in increasing order of stability -- 1. Secondary free radicle 2. Tertiary free radicle 3. Allylic free radicle Why tertiary comes before allylic ??

Discussion

12.	What volume of oxygen gas (O2) measured at 0∘C and 1 atm is needed to burn 500 mL of propane gas (C3H8) completely, measured under the same conditions?
Answer» What volume of oxygen gas $(O_{2})$ measured at $0^{\circ} C$ and $1 atm$ is needed to burn $500 mL$ of propane gas $(C_{3} H_{8})$ completely, measured under the same conditions?

Discussion

13.	Melamine is
Answer» Melamine is

Discussion

14.	The ratio of the speed of the electron in the first Bohr's orbit of hydrogen atom and the speed of light is equal to (where e,h and c have their usual meaning)
Answer» The ratio of the speed of the electron in the first Bohr's orbit of hydrogen atom and the speed of light is equal to (where $e, h$ and $c$ have their usual meaning)

Discussion

15.	Which of the following will have the highest coagulating power for As2S3 colloids?
Answer» Which of the following will have the highest coagulating power for As₂S₃ colloids?

Discussion

16.	Standard Electrode Potential for Fe2+/Fe and Fe3+/Fe are x and y respectively. Standard Electrode Potential for Fe3+/Fe2+ is
Answer» Standard Electrode Potential for Fe2+/Fe and Fe3+/Fe are x and y respectively. Standard Electrode Potential for Fe3+/Fe2+ is

Discussion

17.	A thin tube of uniform cross-section is sealed at both ends. When it lies horizontally, the middle 5 cm contains mercury and the two equal ends contain air at the same pressure P. When the tube is held at an angle of 60∘ with the vertical, then the length of the air columns above and below the mercury column are 46 cm and 44.5 cm respectively. Calculate the pressure P in centimetres of mercury.(The temperature of the system is kept at 30 ∘C)
Answer» A thin tube of uniform cross-section is sealed at both ends. When it lies horizontally, the middle $5 cm$ contains mercury and the two equal ends contain air at the same pressure $P$ . When the tube is held at an angle of $60^{\circ}$ with the vertical, then the length of the air columns above and below the mercury column are $46 cm$ and $44.5 cm$ respectively. Calculate the pressure $P$ in $centimetres$ of mercury. (The temperature of the system is kept at $30^{\circ} C)$

Discussion

18.	Which of the following features are not shown by quartz glass ? (a) This is a crystalline solid (b) Refractive index is same in all the directions (c) This has definite heat of fusion (d) This is also called super cooled liquid
Answer» Which of the following features are not shown by quartz glass ? (a) This is a crystalline solid (b) Refractive index is same in all the directions (c) This has definite heat of fusion (d) This is also called super cooled liquid

18.

Which of the following features are not shown by quartz glass ? (a) This is a crystalline solid (b) Refractive index is same in all the directions (c) This has definite heat of fusion (d) This is also called super cooled liquid

Answer»

Which of the following features are not shown by quartz glass ?

(a) This is a crystalline solid

(b) Refractive index is same in all the directions

(c) This has definite heat of fusion

(d) This is also called super cooled liquid

Discussion

19.	The sugar present in milk is
Answer» The sugar present in milk is

Discussion

20.	The dipole moment of NaCl molecule is 8.4 D and its bond length is 2.1 ∘A. The percentage ionic character in this molecule will be:
Answer» The dipole moment of $N a C l$ molecule is $8.4 D$ and its bond length is $2.1 \circ A$ . The percentage ionic character in this molecule will be:

Discussion

21.	How many maximum electrons can be filled in σ∗3pz orbital?
Answer» How many maximum electrons can be filled in $σ^{*} 3 p_{z}$ orbital?

Discussion

22.	The correct sequence of increasing covalent character is represented by 1.LiCl
Answer» The correct sequence of increasing covalent character is represented by 1.LiCl

Discussion

23.	In ternary and Quaternary solution what is the third and fourth component called respectively?
Answer» In ternary and Quaternary solution what is the third and fourth component called respectively?

Discussion

24.	How many orbitals are maximally possible in an atom?
Answer» How many orbitals are maximally possible in an atom?

Discussion

25.	2g each of solutes A and B are dissolved separately in 50g each of the same solvent. Which will show greater elevation in boiling point?
Answer» 2g each of solutes A and B are dissolved separately in 50g each of the same solvent. Which will show greater elevation in boiling point?

Discussion

26.	The concentration of NO3- ions when equal volumes of 0.1 M AgNO3 and 0.1M NaCl are mixed together is :-
Answer» The concentration of NO3- ions when equal volumes of 0.1 M AgNO3 and 0.1M NaCl are mixed together is :-

Discussion

27.	is degree of dissocation of Nacl is independent of concentration
Answer» is degree of dissocation of Nacl is independent of concentration

Discussion

28.	The heat of neutralisation of a strong acid and a strong alkali is −57.0 kJmol−1. The heat released when 0.5 mole of HNO3 is mixed with 0.2 mole of KOH is:
Answer» The heat of neutralisation of a strong acid and a strong alkali is $- 57.0 k J m o l^{- 1}$ . The heat released when 0.5 mole of $H N O_{3}$ is mixed with 0.2 mole of $K O H$ is:

Discussion

29.	Which among the following is the least basic?
Answer» Which among the following is the least basic?

Discussion

30.	Explain Henry's Law through Le chatelier principles. And also derive the value of the equilibrium constant for a solution process of a gas in liquid.
Answer» Explain Henry's Law through Le chatelier principles. And also derive the value of the equilibrium constant for a solution process of a gas in liquid.

Discussion

31.	For which of the following reactions ΔHreaction is equal to ΔHformation
Answer» For which of the following reactions $Δ H_{r e a c t i o n}$ is equal to $Δ H_{f o r m a t i o n}$

Discussion

32.	Match the polymers given in Column I with their chemical names given in Column II. ColumnIColumnIIA.Nylon−61.Polyvinyl chlorideB.PVC2.PolyacrylonitrileC.Acrilan3.PolycaprolactumD.Natural rubber4.Low density polytheneE.LDP5.cis−polyisoprene
Answer» Match the polymers given in Column I with their chemical names given in Column II. $\begin{matrix} C o l u m n I & C o l u m n I I A . & N y l o n - 6 & 1. & P o l y v i n y l c h l o r i d e B . & P V C & 2. & P o l y a c r y l o n i t r i l e C . & A c r i l a n & 3. & P o l y c a p r o l a c t u m D . & N a t u r a l r u b b e r & 4. & L o w d e n s i t y p o l y t h e n e E . & L D P & 5. & c i s - p o l y i s o p r e n e \end{matrix}$

32.

Match the polymers given in Column I with their chemical names given in Column II. ColumnIColumnIIA.Nylon−61.Polyvinyl chlorideB.PVC2.PolyacrylonitrileC.Acrilan3.PolycaprolactumD.Natural rubber4.Low density polytheneE.LDP5.cis−polyisoprene

Answer»

Match the polymers given in Column I with their chemical names given in Column II.

$\begin{matrix} C o l u m n I & C o l u m n I I A . & N y l o n - 6 & 1. & P o l y v i n y l c h l o r i d e B . & P V C & 2. & P o l y a c r y l o n i t r i l e C . & A c r i l a n & 3. & P o l y c a p r o l a c t u m D . & N a t u r a l r u b b e r & 4. & L o w d e n s i t y p o l y t h e n e E . & L D P & 5. & c i s - p o l y i s o p r e n e \end{matrix}$

Discussion

33.	26.What are organic acid
Answer» 26.What are organic acid

Discussion

34.	10. If the molar volume of KCl and NaCl are x ml and y ml respectively then the ratio of the edge length of Fcc unit cell of KCl and NaCl will be ?
Answer» 10. If the molar volume of KCl and NaCl are x ml and y ml respectively then the ratio of the edge length of Fcc unit cell of KCl and NaCl will be ?

Discussion

35.	6 For an ideal gas when temperature was raised from 300k to 500k at constant pressure and volume, the % of gas escaped was?
Answer» 6 For an ideal gas when temperature was raised from 300k to 500k at constant pressure and volume, the % of gas escaped was?

Discussion

36.	The half life of a first order reaction is 60 min. How long will it take to consume 90% of the reactant?
Answer» The half life of a first order reaction is 60 min. How long will it take to consume 90% of the reactant?

Discussion

37.	Transformation to linear form by substituting v = y1−n of the equation dydt+p(t)y=q(t)yn;n>0 will be
Answer» Transformation to linear form by substituting v = $y^{1 - n}$ of the equation $\frac{d y}{d t} + p (t) y = q (t) y^{n}; n > 0$ will be

Discussion

38.	1ml of co2 contain x molecule .co2 is filled in a cuboidal room of side 10cm find the no of atoms
Answer» 1ml of co2 contain x molecule .co2 is filled in a cuboidal room of side 10cm find the no of atoms

Discussion

39.	26. Explain when ethanolic KCN reacts with RX from RCN and ethanolic AgCN reacts with RX form RNC why?
Answer» 26. Explain when ethanolic KCN reacts with RX from RCN and ethanolic AgCN reacts with RX form RNC why?

Discussion

40.	Predict which one of the following groups will be most preferred in place of X in the given compound? CH3−CH2−+CH−X
Answer» Predict which one of the following groups will be most preferred in place of $X$ in the given compound? $C H_{3} - C H_{2} - + C H - X$

Discussion

41.	nta hydrogen electrode is made by dipping platinum wire in a solution of hcl of ph=10 and by passing hydrogen gas around the platinum wire at 1 atm pressure. the oxidation potential of electrode would ben
Answer» nta hydrogen electrode is made by dipping platinum wire in a solution of hcl of ph=10 and by passing hydrogen gas around the platinum wire at 1 atm pressure. the oxidation potential of electrode would ben

Discussion

42.	The half-life of U238 for α-decay is 4.5×109 years. The number of disintegrations per second that occur in 1 g of U238 is :(Avogadro number =6.023×1023 mo1−1)
Answer» The half-life of $U^{238}$ for $α$ -decay is $4.5 \times 10^{9} years$ . The number of disintegrations per second that occur in $1 g$ of $U^{238}$ is : (Avogadro number $= 6.023 \times 10^{23} {mo1}^{- 1}$ )

Discussion

43.	Which one of the following is the smallest cation?
Answer» Which one of the following is the smallest cation?

Discussion

44.	Assertion -FIRST dissociation constant of maleic acid is more as compared with fumaric acid while second dissociation constant of fumaric acid is more as compared to maleic acid. Reason- that can be explained by hydrogen bonding
Answer» Assertion -FIRST dissociation constant of maleic acid is more as compared with fumaric acid while second dissociation constant of fumaric acid is more as compared to maleic acid. Reason- that can be explained by hydrogen bonding

Discussion

45.	One mole of a monoatomic ideal gas is taken through the cycle shown in figure. A→B: Adiabatic expansion B→C: Cooling at constant volume C→D: Adiabatic compression. D→A: Heating at constant volume The pressure and temperature at A,B,C and D are denoted by (PA,TA),(PB,TB),(PC,TC) and (PD,TD) respectively. Given TA=1000 K,PB=23PA and PC=13PA, the work done by the gas in the process A→B is [Take R=8.31 J/mol K]
Answer» One mole of a monoatomic ideal gas is taken through the cycle shown in figure. $A \to B :$ Adiabatic expansion $B \to C :$ Cooling at constant volume $C \to D :$ Adiabatic compression. $D \to A :$ Heating at constant volume The pressure and temperature at $A, B, C$ and $D$ are denoted by $(P_{A}, T_{A}), (P_{B}, T_{B}), (P_{C}, T_{C})$ and $(P_{D}, T_{D})$ respectively. Given $T_{A} = 1000 K, P_{B} = \frac{2}{3} P_{A}$ and $P_{C} = \frac{1}{3} P_{A}$ , the work done by the gas in the process $A \to B$ is [Take $R = 8.31 J/mol K$ ]

Discussion

46.	The maximum number of structural isomers of primary amine having the molecular formula C5H11NH2 is:
Answer» The maximum number of structural isomers of primary amine having the molecular formula $C_{5} H_{11} N H_{2}$ is:

Discussion

47.	what is adosorption isotherm?
Answer» what is adosorption isotherm?

Discussion

48.	A hydrocarbon contains 85.7% carbon and remaining hydrogen. Molar mass of compound is 42. what is formula of hydrocarbon
Answer» A hydrocarbon contains 85.7% carbon and remaining hydrogen. Molar mass of compound is 42. what is formula of hydrocarbon

Discussion

49.	A compound X have molecular formula C3H6Br2 reacts with NaI and acetone to form a substance which turns starch solution blue. X is?a) CH3-CH(Br)-CH2(Br)b) CH3-CH2-CH(Br2)c) CH3-C(Br2)-CH3d) BrCH2-CH2-CH2Br
Answer» A compound X have molecular formula C3H6Br2 reacts with NaI and acetone to form a substance which turns starch solution blue. X is? a) CH3-CH(Br)-CH2(Br) b) CH3-CH2-CH(Br2) c) CH3-C(Br2)-CH3 d) BrCH2-CH2-CH2Br

Discussion

50.	Analysis shows that nickel oxide has the formula Ni0.98O1.00.What fractions of nickel exist as Ni2+and Ni3+ions?
Answer» Analysis shows that nickel oxide has the formula Ni_0.98O_1.00.What fractions of nickel exist as Ni²⁺and Ni³⁺ions?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A closed soda can has the concentration of CO2at25∘C equal to 0.408 m. Thus, the pressure of CO2 gas in the can is (KH=0.034kg mol−1bar)

Carbocation is Lewis acid? Does a Lewis acid require full one orbital empty? Does a Lewis base require full one orbital filled?

40. if 11. 2 litre of Methane and 22. 4 litre of Ethane at STP are mixed then find the vapour density and average molecular weight of the mixture

what is law of definite proportions?

The correct order of o-o bond length inO2,h2o2 and o3 is

Which of the following are isoelectronic with one another

Aqueous solution of which of following compounds turns red litmus to blue(1)CO2(2)MgO(3)SO2(4)SO3

Every atom is made of electron, proton and neutron only. So why is everything different color? There must be present inside the electrons, protons and neutrons which gives the atom its color. Am I correct?

A balloon is filled with hydrogen at room temperature. It will burst if the pressure exceeds 5 bar. If at 1 bar pressure the gas occupies 2.5 L, upto what volume can the balloon be compressed?

Arrange the given free radicles in increasing order of stability --1. Secondary free radicle2. Tertiary free radicle3. Allylic free radicleWhy tertiary comes before allylic ??

What volume of oxygen gas (O2) measured at 0∘C and 1 atm is needed to burn 500 mL of propane gas (C3H8) completely, measured under the same conditions?

Melamine is

The ratio of the speed of the electron in the first Bohr's orbit of hydrogen atom and the speed of light is equal to (where e,h and c have their usual meaning)

Which of the following will have the highest coagulating power for As2S3 colloids?

Standard Electrode Potential for Fe2+/Fe and Fe3+/Fe are x and y respectively. Standard Electrode Potential for Fe3+/Fe2+ is

Which of the following features are not shown by quartz glass ? (a) This is a crystalline solid (b) Refractive index is same in all the directions (c) This has definite heat of fusion (d) This is also called super cooled liquid

The sugar present in milk is

The dipole moment of NaCl molecule is 8.4 D and its bond length is 2.1 ∘A. The percentage ionic character in this molecule will be:

How many maximum electrons can be filled in σ∗3pz orbital?

The correct sequence of increasing covalent character is represented by 1.LiCl

In ternary and Quaternary solution what is the third and fourth component called respectively?

How many orbitals are maximally possible in an atom?

2g each of solutes A and B are dissolved separately in 50g each of the same solvent. Which will show greater elevation in boiling point?

The concentration of NO3- ions when equal volumes of 0.1 M AgNO3 and 0.1M NaCl are mixed together is :-

is degree of dissocation of Nacl is independent of concentration

The heat of neutralisation of a strong acid and a strong alkali is −57.0 kJmol−1. The heat released when 0.5 mole of HNO3 is mixed with 0.2 mole of KOH is:

Which among the following is the least basic?

Explain Henry's Law through Le chatelier principles. And also derive the value of the equilibrium constant for a solution process of a gas in liquid.

For which of the following reactions ΔHreaction is equal to ΔHformation

Match the polymers given in Column I with their chemical names given in Column II. ColumnIColumnIIA.Nylon−61.Polyvinyl chlorideB.PVC2.PolyacrylonitrileC.Acrilan3.PolycaprolactumD.Natural rubber4.Low density polytheneE.LDP5.cis−polyisoprene

26.What are organic acid

10. If the molar volume of KCl and NaCl are x ml and y ml respectively then the ratio of the edge length of Fcc unit cell of KCl and NaCl will be ?

6 For an ideal gas when temperature was raised from 300k to 500k at constant pressure and volume, the % of gas escaped was?

The half life of a first order reaction is 60 min. How long will it take to consume 90% of the reactant?

Transformation to linear form by substituting v = y1−n of the equation dydt+p(t)y=q(t)yn;n&gt;0 will be

1ml of co2 contain x molecule .co2 is filled in a cuboidal room of side 10cm find the no of atoms

26. Explain when ethanolic KCN reacts with RX from RCN and ethanolic AgCN reacts with RX form RNC why?

Predict which one of the following groups will be most preferred in place of X in the given compound? CH3−CH2−+CH−X

nta hydrogen electrode is made by dipping platinum wire in a solution of hcl of ph=10 and by passing hydrogen gas around the platinum wire at 1 atm pressure. the oxidation potential of electrode would ben

The half-life of U238 for α-decay is 4.5×109 years. The number of disintegrations per second that occur in 1 g of U238 is :(Avogadro number =6.023×1023 mo1−1)

Which one of the following is the smallest cation?

Assertion -FIRST dissociation constant of maleic acid is more as compared with fumaric acid while second dissociation constant of fumaric acid is more as compared to maleic acid. Reason- that can be explained by hydrogen bonding

The maximum number of structural isomers of primary amine having the molecular formula C5H11NH2 is:

what is adosorption isotherm?

A hydrocarbon contains 85.7% carbon and remaining hydrogen. Molar mass of compound is 42. what is formula of hydrocarbon

A compound X have molecular formula C3H6Br2 reacts with NaI and acetone to form a substance which turns starch solution blue. X is?a) CH3-CH(Br)-CH2(Br)b) CH3-CH2-CH(Br2)c) CH3-C(Br2)-CH3d) BrCH2-CH2-CH2Br

Analysis shows that nickel oxide has the formula Ni0.98O1.00.What fractions of nickel exist as Ni2+and Ni3+ions?

Transformation to linear form by substituting v = y1−n of the equation dydt+p(t)y=q(t)yn;n>0 will be