46295 + Interview Questions in Chemistry

1.	Which of the following species is most stable?
Answer» Which of the following species is most stable?

Discussion

2.	The percentage dissociation (α) of CH3COOH having dissociation constant Ka=1.8×10−5M is given as 5%. Find the inital concentration of CH3COOH.
Answer» The percentage dissociation $(α)$ of $C H_{3} C O O H$ having dissociation constant $K_{a} = 1.8 \times 10^{- 5} M$ is given as $5$ %. Find the inital concentration of $C H_{3} C O O H$ .

Discussion

3.	What makes the urgency of the child's demand seem logical?
Answer» What makes the urgency of the child's demand seem logical?

Discussion

4.	Columns 1 represents ΔG,Column 2ΔHand Column 3ΔS.Column1Column2Column3(I)+ve(i)−ve(P)∞(II)∞(ii)0(Q)+ve(III)0(iii)∞(R)−ve(IV)−ve(iv)+ve(S)0 The correct set for Haber’s process is (when equilibrium is just to be reached)
Answer» $\begin{matrix} C o l u m n s 1 r e p r e s e n t s Δ G, & C o l u m n 2 Δ H & a n d C o l u m n 3 Δ S . C o l u m n 1 & C o l u m n 2 & C o l u m n 3 (I) & + v e & (i) & - v e & (P) & \infty (I I) & \infty & (i i) & 0 & (Q) & + v e (I I I) & 0 & (i i i) & \infty & (R) & - v e (I V) & - v e & (i v) & + v e & (S) & 0 \end{matrix}$ The correct set for Haber’s process is (when equilibrium is just to be reached)

Discussion

5.	Rank the following alkenes in order of decreasing heats of hydrogenation: (largest first)
Answer» Rank the following alkenes in order of decreasing heats of hydrogenation: (largest first)

Discussion

6.	\overrightarrow P=χ_e\overrightarrow E find dimesation when χ_e is dimesationless
Answer» \overrightarrow P=χ_e\overrightarrow E find dimesation when χ_e is dimesationless

Discussion

7.	What is the weight of CaO required to remove hardness of 106 L of water containing 1.62 g of Ca(HCO3)2 in 1 L ?The reaction is , CaO+Ca(HCO3)2→2CaCO3+H2O
Answer» What is the weight of $C a O$ required to remove hardness of $10^{6} L$ of water containing $1.62 g o f C a (H C O_{3})_{2}$ in $1 L$ ? The reaction is , $C a O + C a (H C O_{3})_{2} \to 2 C a C O_{3} + H_{2} O$

Discussion

8.	in below rxn A is aso formed when another compund B us oxidised in air . what will be the products of following rxn? CCl4 +H2O-->A + HCl B+Ag+heat--> option. 1)COCl2 3)CHCl3 4)C2H 2)CH3Cl
Answer» in below rxn A is aso formed when another compund B us oxidised in air . what will be the products of following rxn? CCl4 +H2O-->A + HCl B+Ag+heat--> option. 1)COCl2 3)CHCl3 4)C2H 2)CH3Cl

Discussion

9.	On distilling with zinc dust, phenol gives
Answer» On distilling with zinc dust, phenol gives

Discussion

10.	If 99% of a first order reaction was completed in 32 minutes then, when 99.9% of the reaction will complete:
Answer» If $99 %$ of a first order reaction was completed in $32$ minutes then, when $99.9 %$ of the reaction will complete:

Discussion

11.	13. Which of the following pair have molecules having the same ratio of electron and proton ? 1> NH3 , PH3 2> H20 ,NH3 3> H2O , PH3 4> H2S , NH3
Answer» 13. Which of the following pair have molecules having the same ratio of electron and proton ? 1> NH3 , PH3 2> H20 ,NH3 3> H2O , PH3 4> H2S , NH3

Discussion

12.	Two weak bases AOH and BOH having equal concentrations of 0.5 M are present in a solution. Calculate the ratio, [A+][B+] at equilibrium.Dissociation constants for AOH and BOH are 1.1×10−8 and 1.65×10−9 respectively.
Answer» Two weak bases $A O H$ and $B O H$ having equal concentrations of $0.5 M$ are present in a solution. Calculate the ratio, $\frac{[A^{+}]}{[B^{+}]}$ at equilibrium. Dissociation constants for $A O H$ and $B O H$ are $1.1 \times 10^{- 8}$ and $1.65 \times 10^{- 9}$ respectively.

Discussion

13.	explain vesper theory in detai
Answer» explain vesper theory in detai

Discussion

14.	For one of the element various ionization enthalpies (in KJ mol−1) are given below:I.E1st2nd3rd4th5th577.51810275011,58014,820The element is
Answer» For one of the element various ionization enthalpies (in KJ $m o l^{- 1}$ ) are given below: $\begin{matrix} I . E & 1^{s t} & 2^{n d} & 3^{r d} & 4^{t h} & 5^{t h} 577.5 & 1810 & 2750 & 11, 580 & 14, 820 \end{matrix}$ The element is

14.

For one of the element various ionization enthalpies (in KJ mol−1) are given below:I.E1st2nd3rd4th5th577.51810275011,58014,820The element is

Answer»

For one of the element various ionization enthalpies (in KJ $m o l^{- 1}$ ) are given below:

$\begin{matrix} I . E & 1^{s t} & 2^{n d} & 3^{r d} & 4^{t h} & 5^{t h} 577.5 & 1810 & 2750 & 11, 580 & 14, 820 \end{matrix}$

The element is

Discussion

15.	29.In a sample of ammonium phosphate there is 3.18 mole of hydrogen. Find out the no. Moles of O2 atom in the sample?
Answer» 29.In a sample of ammonium phosphate there is 3.18 mole of hydrogen. Find out the no. Moles of O2 atom in the sample?

Discussion

16.	The equilibrium constants for the reactions X = 2Y and Z = P + Q are K1 and K2, respectively. If the initial concentrations and the degree of dissociation of X and Z are the same, the ratio K1K2 is.
Answer» The equilibrium constants for the reactions X = 2Y and Z = P + Q are $K_{1} a n d K_{2}$ , respectively. If the initial concentrations and the degree of dissociation of X and Z are the same, the ratio $\frac{K_{1}}{K_{2}}$ is.

Discussion

17.	equilibrium state is influenced by what? and equilibrium constant is effected by what?
Answer» equilibrium state is influenced by what? and equilibrium constant is effected by what?

Discussion

18.	15.One litre solution contains 1M HOCl [pka=8] and 1M NaOH. What is the pH of the solution:
Answer» 15.One litre solution contains 1M HOCl [pka=8] and 1M NaOH. What is the pH of the solution:

Discussion

19.	Energy levels P, Q, R of an atom are shown below.If EP<EQ<ER, then correct statements of the following is-
Answer» Energy levels $P, Q, R$ of an atom are shown below. If $E_{P} < E_{Q} < E_{R},$ then correct statements of the following is-

Discussion

20.	Choose the product(s) formed by action of Na2CO3 and H3BO3
Answer» Choose the product(s) formed by action of $N a_{2} C O_{3}$ and $H_{3} B O_{3}$

Discussion

21.	Choissez la forme qui convient.
Answer» Choissez la forme qui convient.

Discussion

22.	A compound is composed of three elements P, Q and R. Atoms of elements P, Q and R are present at corners, face-centres and edge centres respectively in a cubic unit cell. If atoms touching the two rectangular planes of symmetry which are perpendicular to each other were removed, then formula of compound is
Answer» A compound is composed of three elements P, Q and R. Atoms of elements P, Q and R are present at corners, face-centres and edge centres respectively in a cubic unit cell. If atoms touching the two rectangular planes of symmetry which are perpendicular to each other were removed, then formula of compound is

Discussion

23.	What will be the coordination number of Ca2+ ion in fluorite crystal?
Answer» What will be the coordination number of $C a^{2 +}$ ion in fluorite crystal?

Discussion

24.	28 : A mixture of no2 and n2o4 has a vapour density of 38.3 at 300 k what is the number of moles of no2 in 100 g of the mixture
Answer» 28 : A mixture of no2 and n2o4 has a vapour density of 38.3 at 300 k what is the number of moles of no2 in 100 g of the mixture

Discussion

25.	Difference betweenStereoselective-specificAndRegioselective-specific
Answer» Difference between Stereoselective-specific And Regioselective-specific

Discussion

26.	Henry's law constant for N2 at 310 K is 82.35 kbar. N2 exerts a partial pressure of 0.0840 bar. If N2 gas is bubbled through water at 293 K, then the number of millimoles of N2 that will dissolven in 1 L of water is
Answer» Henry's law constant for $N_{2}$ at 310 K is 82.35 kbar. $N_{2}$ exerts a partial pressure of 0.0840 bar. If $N_{2}$ gas is bubbled through water at 293 K, then the number of millimoles of $N_{2}$ that will dissolven in 1 L of water is

Discussion

27.	Increasing order of covalent character in NaF,NaCl, NaBr & NaI
Answer» Increasing order of covalent character in NaF,NaCl, NaBr & NaI

Discussion

28.	The concentrated aqueous solution of potassium salts of acetic acid and propanoic acid are electrolyzed. Which of the following are produced?
Answer» The concentrated aqueous solution of potassium salts of acetic acid and propanoic acid are electrolyzed. Which of the following are produced?

Discussion

29.	Determine vapour pressure of an aqueous solution at 373K containing 6% urea by mass and 2.4% Mg(SO4) by mass (alpha = 90%).
Answer» Determine vapour pressure of an aqueous solution at 373K containing 6% urea by mass and 2.4% Mg(SO4) by mass (alpha = 90%).

Discussion

30.	At same temperature which of the following aqueous solutions has maximum conducting power? (1) 1 M NaCl (2) 1 M CH3COOH (3) 1 M HCl (4) 1 M urea
Answer» At same temperature which of the following aqueous solutions has maximum conducting power? (1) 1 M NaCl (2) 1 M CH3COOH (3) 1 M HCl (4) 1 M urea

Discussion

31.	For the complete combustion of 1 mL of C3H8, the volume of CO2 formed will be
Answer» For the complete combustion of 1 mL of C3H8, the volume of CO2 formed will be

Discussion

32.	The CFSE value of tetrahedral [CoCl4]2− complex is:
Answer» The CFSE value of tetrahedral $[C o C l_{4}]^{2 -}$ complex is:

Discussion

33.	What is the rate of reaction for a bimolecular elementary reaction?
Answer» What is the rate of reaction for a bimolecular elementary reaction?

Discussion

34.	The change in the magnitude of the volume of an ideal gas, when a small additional pressure ΔP is applied at a constant temperature, is the same as the change when the temperature is reduced by a small quantity ΔT at constant pressure. The initial temperature and pressure of the gas were 300 K and 2 atm, respectively. If\|ΔT\|=C\|ΔP\|, value of C in (K/atm) is
Answer» The change in the magnitude of the volume of an ideal gas, when a small additional pressure $Δ P$ is applied at a constant temperature, is the same as the change when the temperature is reduced by a small quantity $Δ T$ at constant pressure. The initial temperature and pressure of the gas were $300 K$ and $2 atm$ , respectively. If $\| Δ T \| = C \| Δ P \|$ , value of $C$ in $(K/atm)$ is

Discussion

35.	Time period to complete a half fraction of a reaction varies inversely to the concentration of reactant then the order of reaction will be ?
Answer» Time period to complete a half fraction of a reaction varies inversely to the concentration of reactant then the order of reaction will be ?

Discussion

36.	What are valence electrons? How many valence electrons does a magnesium atom have?
Answer» What are valence electrons? How many valence electrons does a magnesium atom have?

Discussion

37.	Which of the following pairs is not correctly matched?
Answer» Which of the following pairs is not correctly matched?

Discussion

38.	In the formula - Total angular momentum = mvr + I*(Omega) , r vector has to be taken from which point and I has to be taken around which point ?
Answer» In the formula - Total angular momentum = mvr + I*(Omega) , r vector has to be taken from which point and I has to be taken around which point ?

Discussion

39.	In the depression in freezing point experiment it is found that:
Answer» In the depression in freezing point experiment it is found that:

Discussion

40.	Findthe value of x,y, and zfrom the following equation:(i) (ii) (iii)
Answer» Find the value of x, y, and z from the following equation: (i) (ii) (iii)

40.

Findthe value of x,y, and zfrom the following equation:(i) (ii) (iii)

Answer»

Find
the value of x,
y, and z
from the following equation:

(i) (ii)

(iii)

Discussion

41.	A colourless solid (X) on heating evolved CO2 and also gave a white residue, soluble in water. Residue also gave CO2 when treated with dilute acid. (X) is:
Answer» A colourless solid $(X)$ on heating evolved $C O_{2}$ and also gave a white residue, soluble in water. Residue also gave $C O_{2}$ when treated with dilute acid. $(X)$ is:

Discussion

42.	At 25°c the values of molar ionic conductance at infinite dilution of HCL, CH3COONa and NaCl are 456,91.0 and 236 ohm^-1cm^2mol^-1 respectively. If the molar conductance of 0.1M acetic acid solution is 171.05 ohm^-1cm^2mol^-1 what is degree of dissociation of acetic acid?
Answer» At 25°c the values of molar ionic conductance at infinite dilution of HCL, CH3COONa and NaCl are 456,91.0 and 236 ohm^-1cm^2mol^-1 respectively. If the molar conductance of 0.1M acetic acid solution is 171.05 ohm^-1cm^2mol^-1 what is degree of dissociation of acetic acid?

Discussion

43.	for zero order reaction X+Y=Z.write the rate equation
Answer» for zero order reaction X+Y=Z.write the rate equation

Discussion

44.	Which of the following has the highest nucleophilicty1) CH3-O^-(2) CH_3-CH_2-O^-(3) CH_3-CH(CH_3)-O^-(4) CH_3-C(CH_3)_2-O^{
Answer» Which of the following has the highest nucleophilicty1) CH3-O^-(2) CH_3-CH_2-O^-(3) CH_3-CH(CH_3)-O^-(4) CH_3-C(CH_3)_2-O^{

Discussion

45.	Rank the non-bonding electrons indicated by the arrows in order of their increasing energy:
Answer» Rank the non-bonding electrons indicated by the arrows in order of their increasing energy:

Discussion

46.	Manganese exhibits maximum oxidation state in
Answer» Manganese exhibits maximum oxidation state in

Discussion

47.	Which of the following group(s) will not show −R effect?
Answer» Which of the following group(s) will not show $- R$ effect?

Discussion

48.	METAL + H2O(l) = HYDROXIDEMETAL + H2O(g) = OXIDEHIGHLY REACTIVE METAL + H20 = HYDROXIDE = H2LESS REACTIVE METAL + H2O = OXIDE + H2IF LESS REACTIVE METAL REACT WITH H20 (l) THEN WHAT IT WILL FORM AND IF HIGHLY REACTIVE METAL REACT WITH H2O (g) THEN WHAT IT WILL FORM
Answer» METAL + H2O(l) = HYDROXIDE METAL + H2O(g) = OXIDE HIGHLY REACTIVE METAL + H20 = HYDROXIDE = H2 LESS REACTIVE METAL + H2O = OXIDE + H2 IF LESS REACTIVE METAL REACT WITH H20 (l) THEN WHAT IT WILL FORM AND IF HIGHLY REACTIVE METAL REACT WITH H2O (g) THEN WHAT IT WILL FORM

Discussion

49.	12g Mg react with dilute mineral acid to produce maximum hydrogen equal to ?
Answer» 12g Mg react with dilute mineral acid to produce maximum hydrogen equal to ?

Discussion

50.	What is the total number of atoms or groups surrounding each phosphorus atom in its oxoacids?
Answer» What is the total number of atoms or groups surrounding each phosphorus atom in its oxoacids?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Which of the following species is most stable?

The percentage dissociation (α) of CH3COOH having dissociation constant Ka=1.8×10−5M is given as 5%. Find the inital concentration of CH3COOH.

What makes the urgency of the child's demand seem logical?

Columns 1 represents ΔG,Column 2ΔHand Column 3ΔS.Column1Column2Column3(I)+ve(i)−ve(P)∞(II)∞(ii)0(Q)+ve(III)0(iii)∞(R)−ve(IV)−ve(iv)+ve(S)0 The correct set for Haber’s process is (when equilibrium is just to be reached)

Rank the following alkenes in order of decreasing heats of hydrogenation: (largest first)

\overrightarrow P=χ_e\overrightarrow E find dimesation when χ_e is dimesationless

What is the weight of CaO required to remove hardness of 106 L of water containing 1.62 g of Ca(HCO3)2 in 1 L ?The reaction is , CaO+Ca(HCO3)2→2CaCO3+H2O

in below rxn A is aso formed when another compund B us oxidised in air . what will be the products of following rxn? CCl4 +H2O-->A + HCl B+Ag+heat--> option. 1)COCl2 3)CHCl3 4)C2H 2)CH3Cl

On distilling with zinc dust, phenol gives

If 99% of a first order reaction was completed in 32 minutes then, when 99.9% of the reaction will complete:

13. Which of the following pair have molecules having the same ratio of electron and proton ? 1> NH3 , PH3 2> H20 ,NH3 3> H2O , PH3 4> H2S , NH3

Two weak bases AOH and BOH having equal concentrations of 0.5 M are present in a solution. Calculate the ratio, [A+][B+] at equilibrium.Dissociation constants for AOH and BOH are 1.1×10−8 and 1.65×10−9 respectively.

explain vesper theory in detai

For one of the element various ionization enthalpies (in KJ mol−1) are given below:I.E1st2nd3rd4th5th577.51810275011,58014,820The element is

29.In a sample of ammonium phosphate there is 3.18 mole of hydrogen. Find out the no. Moles of O2 atom in the sample?

The equilibrium constants for the reactions X = 2Y and Z = P + Q are K1 and K2, respectively. If the initial concentrations and the degree of dissociation of X and Z are the same, the ratio K1K2 is.

equilibrium state is influenced by what? and equilibrium constant is effected by what?

15.One litre solution contains 1M HOCl [pka=8] and 1M NaOH. What is the pH of the solution:

Energy levels P, Q, R of an atom are shown below.If EP&lt;EQ&lt;ER, then correct statements of the following is-

Choose the product(s) formed by action of Na2CO3 and H3BO3

Choissez la forme qui convient.

What will be the coordination number of Ca2+ ion in fluorite crystal?

28 : A mixture of no2 and n2o4 has a vapour density of 38.3 at 300 k what is the number of moles of no2 in 100 g of the mixture

Difference betweenStereoselective-specificAndRegioselective-specific

Henry's law constant for N2 at 310 K is 82.35 kbar. N2 exerts a partial pressure of 0.0840 bar. If N2 gas is bubbled through water at 293 K, then the number of millimoles of N2 that will dissolven in 1 L of water is

Increasing order of covalent character in NaF,NaCl, NaBr & NaI

The concentrated aqueous solution of potassium salts of acetic acid and propanoic acid are electrolyzed. Which of the following are produced?

Determine vapour pressure of an aqueous solution at 373K containing 6% urea by mass and 2.4% Mg(SO4) by mass (alpha = 90%).

At same temperature which of the following﻿ aqueous solutions has maximum conducting﻿ power?﻿ (1) 1 M NaCl﻿ (2) 1 M CH3COOH﻿ (3) 1 M HCl﻿ (4) 1 M urea

For the complete combustion of 1 mL of C3H8, the volume of CO2 formed will be

The CFSE value of tetrahedral [CoCl4]2− complex is:

What is the rate of reaction for a bimolecular elementary reaction?

Time period to complete a half fraction of a reaction varies inversely to the concentration of reactant then the order of reaction will be ?

What are valence electrons? How many valence electrons does a magnesium atom have?

Which of the following pairs is not correctly matched?

In the formula - Total angular momentum = mvr + I*(Omega) , r vector has to be taken from which point and I has to be taken around which point ?

In the depression in freezing point experiment it is found that:

Findthe value of x,y, and zfrom the following equation:(i) (ii) (iii)

A colourless solid (X) on heating evolved CO2 and also gave a white residue, soluble in water. Residue also gave CO2 when treated with dilute acid. (X) is:

At 25°c the values of molar ionic conductance at infinite dilution of HCL, CH3COONa and NaCl are 456,91.0 and 236 ohm^-1cm^2mol^-1 respectively. If the molar conductance of 0.1M acetic acid solution is 171.05 ohm^-1cm^2mol^-1 what is degree of dissociation of acetic acid?

for zero order reaction X+Y=Z.write the rate equation

Which of the following has the highest nucleophilicty1) CH3-O^-(2) CH_3-CH_2-O^-(3) CH_3-CH(CH_3)-O^-(4) CH_3-C(CH_3)_2-O^{

Rank the non-bonding electrons indicated by the arrows in order of their increasing energy:

Manganese exhibits maximum oxidation state in

Which of the following group(s) will not show −R effect?

METAL + H2O(l) = HYDROXIDEMETAL + H2O(g) = OXIDEHIGHLY REACTIVE METAL + H20 = HYDROXIDE = H2LESS REACTIVE METAL + H2O = OXIDE + H2IF LESS REACTIVE METAL REACT WITH H20 (l) THEN WHAT IT WILL FORM AND IF HIGHLY REACTIVE METAL REACT WITH H2O (g) THEN WHAT IT WILL FORM

12g Mg react with dilute mineral acid to produce maximum hydrogen equal to ?

What is the total number of atoms or groups surrounding each phosphorus atom in its oxoacids?

Energy levels P, Q, R of an atom are shown below.If EP<EQ<ER, then correct statements of the following is-

At same temperature which of the following aqueous solutions has maximum conducting power? (1) 1 M NaCl (2) 1 M CH3COOH (3) 1 M HCl (4) 1 M urea