46295 + Interview Questions in Chemistry

1.	48 when C6H5Cl + KNH2 in presence of liq. NH3 reacted what will be the product?
Answer» 48 when C6H5Cl + KNH2 in presence of liq. NH3 reacted what will be the product?

Discussion

2.	Which of the following is the most stable?
Answer» Which of the following is the most stable?

Discussion

3.	N2H2 is polar molecule with london dispersion forces,dipole-dipole forces and H-bonding .True or false?How?
Answer» N2H2 is polar molecule with london dispersion forces,dipole-dipole forces and H-bonding .True or false?How?

Discussion

4.	Q.When 500ml of propane was burnt with 3000ml of oxygen,the yield of the gaseous product was just 50% of expected. Find out the total volume of all the gases at the end of reaction.
Answer» Q.When 500ml of propane was burnt with 3000ml of oxygen,the yield of the gaseous product was just 50% of expected. Find out the total volume of all the gases at the end of reaction.

Discussion

5.	32. What is 1S,2S configuration ?
Answer» 32. What is 1S,2S configuration ?

Discussion

6.	why is 5 called as magnitude
Answer» why is 5 called as magnitude

Discussion

7.	35. a) Calcium carbonate reacts with aqueous HCl according to the reaction: }{ CaCO_3(s)+2HCl(aq)→ CaCl_2(aq)+CO_2(g)+H_2O(l)} . What mass of CaCO3 is required to react completely with 25ml of 0.75M HCl } b) }1.0g of a mixture of }CaCO_3 and }MgCO_3 gave }240cm^3 of }CO_2 at STP. Calculate the percentage } composition of the mixture.
Answer» 35. a) Calcium carbonate reacts with aqueous HCl according to the reaction: }{ CaCO_3(s)+2HCl(aq)→ CaCl_2(aq)+CO_2(g)+H_2O(l)} . What mass of CaCO3 is required to react completely with 25ml of 0.75M HCl } b) }1.0g of a mixture of }CaCO_3 and }MgCO_3 gave }240cm^3 of }CO_2 at STP. Calculate the percentage } composition of the mixture.

Discussion

8.	what is open chain structure?
Answer» what is open chain structure?

Discussion

9.	Calculate resonance energy of N2O from the following data Hence, △H∘(N2O)=82 kJmol−1 Assume structure NΘ=N⨁=O BE of (N≡N) bond=950 kJmol−1 (N=N) bond=420 kJ mol−1 O=O) bond=500 kJmol−1 (O=N) bond=610 kJmol−1
Answer» Calculate resonance energy of $N_{2} O$ from the following data Hence, $△ H^{\circ} (N_{2} O) = 82 k J m o l^{- 1}$ Assume structure $N^{Θ} = N^{⨁} = O$ BE of $(N \equiv N) b o n d = 950 k J m o l^{- 1}$ $(N = N) b o n d = 420 k J$ mol $^{- 1}$ $O = O) b o n d = 500 k J m o l^{- 1}$ $(O = N) b o n d = 610 k J m o l^{- 1}$

Discussion

10.	Calculate the number of peroxy linkage(s) in H3PO5.
Answer» Calculate the number of peroxy linkage(s) in $H_{3} P O_{5}$ .

Discussion

11.	11.18% (w/V) solution of urea (Mol. mass-60) is(1) 1 M(3) 0.3 M(2) 2 M(4) 3 M
Answer» 11.18% (w/V) solution of urea (Mol. mass-60) is(1) 1 M(3) 0.3 M(2) 2 M(4) 3 M

Discussion

12.	A reaction takes place in three steps. The rate constant of the three steps are k1,k2 and k3 respectively. The overall rate constant k=k1k3k2. The energy of activation for the three steps are 40, 30 and 20 kJ respectively. Therefore:
Answer» A reaction takes place in three steps. The rate constant of the three steps are $k_{1}, k_{2}$ and $k_{3}$ respectively. The overall rate constant $k = \frac{k_{1} k_{3}}{k_{2}} .$ The energy of activation for the three steps are 40, 30 and 20 kJ respectively. Therefore:

Discussion

13.	Which of the following graphs correctly represents the variation of =−(dVdP)V with P for an ideal gas at
Answer» Which of the following graphs correctly represents the variation of $= - \frac{(\frac{d V}{d P})}{V}$ with P for an ideal gas at

Discussion

14.	The increasing order of atomic radii of the following Group 13 elements is:
Answer» The increasing order of atomic radii of the following Group 13 elements is:

Discussion

15.	Why is cyclobutadiene carbanion is anti-aromatic?
Answer» Why is cyclobutadiene carbanion is anti-aromatic?

Discussion

16.	Which of the following has the most negative heat of hydrogenation?
Answer» Which of the following has the most negative heat of hydrogenation?

Discussion

17.	Consider the reaction of water with F2 and suggest, in terms of oxidation and reduction, which species are oxidized/reduced.
Answer» Consider the reaction of water with F₂ and suggest, in terms of oxidation and reduction, which species are oxidized/reduced.

Discussion

18.	Whatis the equilibrium concentration of each of the substances in theequilibrium when the initial concentration of ICl was 0.78 M?
Answer» What is the equilibrium concentration of each of the substances in the equilibrium when the initial concentration of ICl was 0.78 M?

18.

Whatis the equilibrium concentration of each of the substances in theequilibrium when the initial concentration of ICl was 0.78 M?

Answer»

What
is the equilibrium concentration of each of the substances in the
equilibrium when the initial concentration of ICl was 0.78 M?

Discussion

19.	Equivalent conductance of 0.1 M HA(weak acid) solution is 1Scm2equivalent−1 and that at infinite dilution is 1Scm2equivalent−1 Hence pH of HA solution is
Answer» Equivalent conductance of 0.1 M HA(weak acid) solution is $1 S c m^{2} e q u i v a l e n t - 1$ and that at infinite dilution is $1 S c m^{2} e q u i v a l e n t - 1$ Hence pH of HA solution is

Discussion

20.	write different structural isomers of alkene corresponding to C5H10
Answer» write different structural isomers of alkene corresponding to C5H10

Discussion

21.	there are eight isomers that has a molecular formula C5 H11 Br .How many of these are tertiary alkyl bromides
Answer» there are eight isomers that has a molecular formula C5 H11 Br .How many of these are tertiary alkyl bromides

Discussion

22.	why 1 methyl but 1 yne is not possible
Answer» why 1 methyl but 1 yne is not possible

Discussion

23.	coordination number of atoms in a hexagonal closed packed structure are
Answer» coordination number of atoms in a hexagonal closed packed structure are

Discussion

24.	If Hg2Cl2 is 100% ionised then it's vant hoff factor will be
Answer» If Hg2Cl2 is 100% ionised then it's vant hoff factor will be

Discussion

25.	Anything that influences the valence electrons will affect the chemistry of the element. Which one of the following factors does not affect the valence shell? (a) Valence principal quantum number (n) (b) Nuclear charge (Z) (c) Nuclear mass (d) Number of core electrons.
Answer» Anything that influences the valence electrons will affect the chemistry of the element. Which one of the following factors does not affect the valence shell? (a) Valence principal quantum number (n) (b) Nuclear charge (Z) (c) Nuclear mass (d) Number of core electrons.

Discussion

26.	Calculate the percentage of canesugar solution which will have same freezing point as that of 3% aqueous solution of urea.
Answer» Calculate the percentage of canesugar solution which will have same freezing point as that of 3% aqueous solution of urea.

Discussion

27.	CsCl crystallizes in a cubic cell that has a Cl^- at each corner and Cs^+ at the center of the unit cell ,if radius of Cs^+is 1.69A^o and r_{Cl}=1.81 A^o,what is the edge lenght of unit cell
Answer» CsCl crystallizes in a cubic cell that has a Cl^- at each corner and Cs^+ at the center of the unit cell ,if radius of Cs^+is 1.69A^o and r_{Cl}=1.81 A^o,what is the edge lenght of unit cell

Discussion

28.	what does "N" mean in the IUPAC name: N ethyl methanamide?
Answer» what does "N" mean in the IUPAC name: N ethyl methanamide?

Discussion

29.	The market for a good is in equilibrium. What is the effect on equilibrium price and quantity if the increase in the market demand is greater than an increase in market supply?
Answer» The market for a good is in equilibrium. What is the effect on equilibrium price and quantity if the increase in the market demand is greater than an increase in market supply?

Discussion

30.	Explain vernier scale?
Answer» Explain vernier scale?

Discussion

31.	Be3+ and a proton are accelerated by the same potential, their de-Broglie wavelengths have the ratio(assume mass of proton= mass of neutron)
Answer» Be3+ and a proton are accelerated by the same potential, their de-Broglie wavelengths have the ratio(assume mass of proton= mass of neutron)

Discussion

32.	Z is
Answer» Z is

32.

Z is

Answer»

Z is

Discussion

33.	What is the compressibility factor (Z) for 0.02 mole of a van der waal's gas at pressure of 0.1 atm. Assume the size of gas molecule is negligible.(Given: RT=20 L atm mol−1 and a=1000 atm L−2 mol−1)
Answer» What is the compressibility factor $(Z)$ for $0.02$ mole of a van der waal's gas at pressure of $0.1 a t m$ . Assume the size of gas molecule is negligible. (Given: $R T = 20 L a t m m o l^{- 1}$ and $a = 1000 a t m L^{- 2} m o l^{- 1}$ )

Discussion

34.	why does condensed matter and dense gases emit electromagnetic radiation at all temperature?
Answer» why does condensed matter and dense gases emit electromagnetic radiation at all temperature?

Discussion

35.	23. The basic structural unit of silicates is
Answer» 23. The basic structural unit of silicates is

Discussion

36.	Column-I-Compound, Column-II-Oxidation state, Column-III-Type of linkage Column 1Column 2Column 3(I)Na2S2O3(i)+5(P)S−O−S(II)Na2S4O6(ii)−2(Q)S−S(III)H2S2O7(iii)+6(R)−(O−O)−(IV)H2S2O8(iv)+4(S)S=S The only correct combination for Marshall’s acid:
Answer» Column-I-Compound, Column-II-Oxidation state, Column-III-Type of linkage $\begin{matrix} C o l u m n 1 & C o l u m n 2 & C o l u m n 3 (I) & N a_{2} S_{2} O_{3} & (i) & + 5 & (P) & S - O - S (I I) & N a_{2} S_{4} O_{6} & (i i) & - 2 & (Q) & S - S (I I I) & H_{2} S_{2} O_{7} & (i i i) & + 6 & (R) & - (O - O) - (I V) & H_{2} S_{2} O_{8} & (i v) & + 4 & (S) & S = S \end{matrix}$ The only correct combination for Marshall’s acid:

36.

Column-I-Compound, Column-II-Oxidation state, Column-III-Type of linkage Column 1Column 2Column 3(I)Na2S2O3(i)+5(P)S−O−S(II)Na2S4O6(ii)−2(Q)S−S(III)H2S2O7(iii)+6(R)−(O−O)−(IV)H2S2O8(iv)+4(S)S=S The only correct combination for Marshall’s acid:

Answer»

Column-I-Compound, Column-II-Oxidation state, Column-III-Type of linkage

$\begin{matrix} C o l u m n 1 & C o l u m n 2 & C o l u m n 3 (I) & N a_{2} S_{2} O_{3} & (i) & + 5 & (P) & S - O - S (I I) & N a_{2} S_{4} O_{6} & (i i) & - 2 & (Q) & S - S (I I I) & H_{2} S_{2} O_{7} & (i i i) & + 6 & (R) & - (O - O) - (I V) & H_{2} S_{2} O_{8} & (i v) & + 4 & (S) & S = S \end{matrix}$

The only correct combination for Marshall’s acid:

Discussion

37.	Total number of possible amides (including stereoisomers) with molecular formula C5H11NO is X. Find the value of X4.
Answer» Total number of possible amides (including stereoisomers) with molecular formula $C_{5} H_{11} N O$ is $X$ . Find the value of $\frac{X}{4}$ .

Discussion

38.	When copper pyrites is roasted in excess of air, a mixture of CuO + FeO is formed. FeO is present as impurity. This can be removed as slag during reduction of CuO. The flux added to form slag is
Answer» When copper pyrites is roasted in excess of air, a mixture of CuO + FeO is formed. FeO is present as impurity. This can be removed as slag during reduction of CuO. The flux added to form slag is

Discussion

39.	14. How to find hybridisation of carbon atom
Answer» 14. How to find hybridisation of carbon atom

Discussion

40.	26 Find oxidation no. Of following 1 NH3+ (O.N. OF N) 2 C6H12O6 ( O.N. OF C) 3 PB3O4 (O.N. OF PB) 4 FE3O4 (O.N. OF FE ) 5 AG(NO3)2+ (O.N. OF AG)
Answer» 26 Find oxidation no. Of following 1 NH3+ (O.N. OF N) 2 C6H12O6 ( O.N. OF C) 3 PB3O4 (O.N. OF PB) 4 FE3O4 (O.N. OF FE ) 5 AG(NO3)2+ (O.N. OF AG)

Discussion

41.	31.Write the cyclisation reaction w.r.t. the chemical properties of alkanes.
Answer» 31.Write the cyclisation reaction w.r.t. the chemical properties of alkanes.

Discussion

42.	The equivalent weight of FeS2 in the following reaction is FeS2+O2 givesFe+3 +SO2
Answer» The equivalent weight of FeS2 in the following reaction is FeS2+O2 givesFe+3 +SO2

Discussion

43.	Conversion of Ketoximes to N- substituted amides is known as Beckmann rearrangement. In this rearrangement migration takes place from carbon to nitrogen. The reaction is catalyzed by acidic reagents. The main function of the acidic catalyst is to convert -OH of the oxime into a better leaving group by protonation.
Answer» Conversion of Ketoximes to N- substituted amides is known as Beckmann rearrangement. In this rearrangement migration takes place from carbon to nitrogen. The reaction is catalyzed by acidic reagents. The main function of the acidic catalyst is to convert -OH of the oxime into a better leaving group by protonation.

43.

Conversion of Ketoximes to N- substituted amides is known as Beckmann rearrangement. In this rearrangement migration takes place from carbon to nitrogen. The reaction is catalyzed by acidic reagents. The main function of the acidic catalyst is to convert -OH of the oxime into a better leaving group by protonation.

Answer»

Conversion of Ketoximes to N- substituted amides is known as Beckmann rearrangement. In this rearrangement migration takes place from carbon to nitrogen. The reaction is catalyzed by acidic reagents. The main function of the acidic catalyst is to convert -OH of the oxime into a better leaving group by protonation.

Discussion

44.	List the important sources of sulphur.
Answer» List the important sources of sulphur.

Discussion

45.	In the following conversion of sulphide of phosphorous P_4S_{3 ---> }P_2O_5 + SO_2 Equivalent weight of P4S
Answer» In the following conversion of sulphide of phosphorous P_4S_{3 ---> }P_2O_5 + SO_2 Equivalent weight of P4S

Discussion

46.	Suppose the ground state radius and velocity of anelectron in a Bohr's atom are r andrespectively. If hypothetically the mass of electronbecomes 200 times of its present value, then the ground state radius and velocity will be respectively
Answer» Suppose the ground state radius and velocity of anelectron in a Bohr's atom are r andrespectively. If hypothetically the mass of electronbecomes 200 times of its present value, then the ground state radius and velocity will be respectively

Discussion

47.	The gas that does not show Joule Thomson effect is
Answer» The gas that does not show Joule Thomson effect is

Discussion

48.	71 Both propene and cyclopropane undergo addition reaction. True or False?
Answer» 71 Both propene and cyclopropane undergo addition reaction. True or False?

Discussion

49.	50 g of sample of Ca(OH)2 is dissolved in 50 ml of 0.5 N HCl solution. The excess HCl was titrated with 0.25 N NaOH solution. The volume of NaOH used was 20 ml. What is % purity of Ca(OH)2 in the sample?
Answer» 50 g of sample of $C a (O H)_{2}$ is dissolved in 50 ml of 0.5 N HCl solution. The excess HCl was titrated with 0.25 N NaOH solution. The volume of NaOH used was 20 ml. What is % purity of $C a (O H)_{2}$ in the sample?

Discussion

50.	Which of the following pairs of elements would have a more negative electron gain enthalpy? (i) O or F (ii) F or Cl
Answer» Which of the following pairs of elements would have a more negative electron gain enthalpy? (i) O or F (ii) F or Cl

50.

Which of the following pairs of elements would have a more negative electron gain enthalpy? (i) O or F (ii) F or Cl

Answer»

Which of the following pairs of elements would have a more negative electron gain enthalpy?
(i) O or F

(ii) F or Cl

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

48 when C6H5Cl + KNH2 in presence of liq. NH3 reacted what will be the product?

Which of the following is the most stable?

N2H2 is polar molecule with london dispersion forces,dipole-dipole forces and H-bonding .True or false?How?

Q.When 500ml of propane was burnt with 3000ml of oxygen,the yield of the gaseous product was just 50% of expected. Find out the total volume of all the gases at the end of reaction.

32. What is 1S,2S configuration ?

why is 5 called as magnitude

what is open chain structure?

Calculate resonance energy of N2O from the following data Hence, △H∘(N2O)=82 kJmol−1 Assume structure NΘ=N⨁=O BE of (N≡N) bond=950 kJmol−1 (N=N) bond=420 kJ mol−1 O=O) bond=500 kJmol−1 (O=N) bond=610 kJmol−1

Calculate the number of peroxy linkage(s) in H3PO5.

11.18% (w/V) solution of urea (Mol. mass-60) is(1) 1 M(3) 0.3 M(2) 2 M(4) 3 M

A reaction takes place in three steps. The rate constant of the three steps are k1,k2 and k3 respectively. The overall rate constant k=k1k3k2. The energy of activation for the three steps are 40, 30 and 20 kJ respectively. Therefore:

Which of the following graphs correctly represents the variation of =−(dVdP)V with P for an ideal gas at

The increasing order of atomic radii of the following Group 13 elements is:

Why is cyclobutadiene carbanion is anti-aromatic?

Which of the following has the most negative heat of hydrogenation?

Consider the reaction of water with F2 and suggest, in terms of oxidation and reduction, which species are oxidized/reduced.

Whatis the equilibrium concentration of each of the substances in theequilibrium when the initial concentration of ICl was 0.78 M?

Equivalent conductance of 0.1 M HA(weak acid) solution is 1Scm2equivalent−1 and that at infinite dilution is 1Scm2equivalent−1 Hence pH of HA solution is

write different structural isomers of alkene corresponding to C5H10

there are eight isomers that has a molecular formula C5 H11 Br .How many of these are tertiary alkyl bromides

why 1 methyl but 1 yne is not possible

coordination number of atoms in a hexagonal closed packed structure are

If Hg2Cl2 is 100% ionised then it's vant hoff factor will be

Anything that influences the valence electrons will affect the chemistry of the element. Which one of the following factors does not affect the valence shell? (a) Valence principal quantum number (n) (b) Nuclear charge (Z) (c) Nuclear mass (d) Number of core electrons.

Calculate the percentage of canesugar solution which will have same freezing point as that of 3% aqueous solution of urea.

CsCl crystallizes in a cubic cell that has a Cl^- at each corner and Cs^+ at the center of the unit cell ,if radius of Cs^+is 1.69A^o and r_{Cl}=1.81 A^o,what is the edge lenght of unit cell

what does "N" mean in the IUPAC name: N ethyl methanamide?

The market for a good is in equilibrium. What is the effect on equilibrium price and quantity if the increase in the market demand is greater than an increase in market supply?

Explain vernier scale?

Be3+ and a proton are accelerated by the same potential, their de-Broglie wavelengths have the ratio(assume mass of proton= mass of neutron)

Z is

What is the compressibility factor (Z) for 0.02 mole of a van der waal's gas at pressure of 0.1 atm. Assume the size of gas molecule is negligible.(Given: RT=20 L atm mol−1 and a=1000 atm L−2 mol−1)

why does condensed matter and dense gases emit electromagnetic radiation at all temperature?

23. The basic structural unit of silicates is

Column-I-Compound, Column-II-Oxidation state, Column-III-Type of linkage Column 1Column 2Column 3(I)Na2S2O3(i)+5(P)S−O−S(II)Na2S4O6(ii)−2(Q)S−S(III)H2S2O7(iii)+6(R)−(O−O)−(IV)H2S2O8(iv)+4(S)S=S The only correct combination for Marshall’s acid:

Total number of possible amides (including stereoisomers) with molecular formula C5H11NO is X. Find the value of X4.

When copper pyrites is roasted in excess of air, a mixture of CuO + FeO is formed. FeO is present as impurity. This can be removed as slag during reduction of CuO. The flux added to form slag is

14. How to find hybridisation of carbon atom

26 Find oxidation no. Of following 1 NH3+ (O.N. OF N) 2 C6H12O6 ( O.N. OF C) 3 PB3O4 (O.N. OF PB) 4 FE3O4 (O.N. OF FE ) 5 AG(NO3)2+ (O.N. OF AG)

31.Write the cyclisation reaction w.r.t. the chemical properties of alkanes.

The equivalent weight of FeS2 in the following reaction is FeS2+O2 givesFe+3 +SO2

List the important sources of sulphur.

In the following conversion of sulphide of phosphorous P_4S_{3 ---> }P_2O_5 + SO_2 Equivalent weight of P4S

Suppose the ground state radius and velocity of anelectron in a Bohr's atom are r andrespectively. If hypothetically the mass of electronbecomes 200 times of its present value, then the ground state radius and velocity will be respectively

The gas that does not show Joule Thomson effect is

71 Both propene and cyclopropane undergo addition reaction. True or False?

50 g of sample of Ca(OH)2 is dissolved in 50 ml of 0.5 N HCl solution. The excess HCl was titrated with 0.25 N NaOH solution. The volume of NaOH used was 20 ml. What is % purity of Ca(OH)2 in the sample?

Which of the following pairs of elements would have a more negative electron gain enthalpy? (i) O or F (ii) F or Cl