46295 + Interview Questions in Chemistry

1.	what is the order of magnitude of 5900?
Answer» what is the order of magnitude of 5900?

Discussion

2.	titration is carried out in between N/10 acetic acid and N/10 NaOH .how much difference will be there in pH values of the solutions obtained by 30% and 60% completion of titration
Answer» titration is carried out in between N/10 acetic acid and N/10 NaOH .how much difference will be there in pH values of the solutions obtained by 30% and 60% completion of titration

Discussion

3.	66. How does magnetic moment depend on number of unpaired electrons?
Answer» 66. How does magnetic moment depend on number of unpaired electrons?

Discussion

4.	Which of the following reagent is suitable for the preparation of the product in the following reaction?
Answer» Which of the following reagent is suitable for the preparation of the product in the following reaction?

Discussion

5.	What are superoxides?
Answer» What are superoxides?

Discussion

6.	ntON THE BASIS OF FOLLOWING E VALUEn nt[Fe(CN)6]4- GIVES [Fe(CN)6]3- + e E=-0.35n ntFe2+ gives Fe3+ + e E=-0.77n ntSTRONGEST O.A ISn nt1 Fe2+n nt2 Fe3+n nt3 [Fe(CN)6]3-n nt4 [Fe(CN)6]4-n ntn
Answer» ntON THE BASIS OF FOLLOWING E VALUEn nt[Fe(CN)6]4- GIVES [Fe(CN)6]3- + e E=-0.35n ntFe2+ gives Fe3+ + e E=-0.77n ntSTRONGEST O.A ISn nt1 Fe2+n nt2 Fe3+n nt3 [Fe(CN)6]3-n nt4 [Fe(CN)6]4-n ntn

Discussion

7.	Tautomerism is not exhibited by :
Answer» Tautomerism is not exhibited by :

Discussion

8.	The ratio of stoichiometric coefficients of triatomic gas to the tetra atomic gas released on thermal decomposition of two moles of ferrous sulphate ?
Answer» The ratio of stoichiometric coefficients of triatomic gas to the tetra atomic gas released on thermal decomposition of two moles of ferrous sulphate ?

Discussion

9.	A valid Lewis structure of which of the following compounds cannot be drawn without violating the octet rule?
Answer» A valid Lewis structure of which of the following compounds cannot be drawn without violating the octet rule?

Discussion

10.	Glucose Ag2O→ XGlucose Conc.HNO3→ YX. Y and X respectively are:
Answer» $G l u c o s e A g_{2} O \to X$ $G l u c o s e C o n c . H N O_{3} \to Y$ X. Y and X respectively are:

10.

Glucose Ag2O→ XGlucose Conc.HNO3→ YX. Y and X respectively are:

Answer»

$G l u c o s e A g_{2} O \to X$

$G l u c o s e C o n c . H N O_{3} \to Y$

X. Y and X respectively are:

Discussion

11.	For an ideal gas, in an isothermal process
Answer» For an ideal gas, in an isothermal process

Discussion

12.	Number of tetrahedral bond angles (i.e. 109^o28') in CH_4 is ? (1) 4 (2) 6 (3) 5 (4) 8
Answer» Number of tetrahedral bond angles (i.e. 109^o28') in CH_4 is ? (1) 4 (2) 6 (3) 5 (4) 8

Discussion

13.	In a certain reaction shown below 4A+2B→3C If rate of formation of C is 9.6×10^{-2} mol/Ls,What will be the rate of reaction?
Answer» In a certain reaction shown below 4A+2B→3C If rate of formation of C is 9.6×10^{-2} mol/Ls,What will be the rate of reaction?

Discussion

14.	What is zero order of the reaction??
Answer» What is zero order of the reaction??

Discussion

15.	25.3 g of sodium carbonate, Na2CO3 is dissolved in enough water to make 250 mL of solution. If Sodium carbonate dissociates completely, molar concentration of sodium ion, Na+ and carbonate ions, CO2−3 are respectively (molar mass of Na2CO3=106 g mol−1)
Answer» $25.3 g$ of sodium carbonate, $N a_{2} C O_{3}$ is dissolved in enough water to make $250 m L$ of solution. If Sodium carbonate dissociates completely, molar concentration of sodium ion, $N a^{+}$ and carbonate ions, $C O_{3}^{2 -}$ are respectively $(molar mass of N a_{2} C O_{3} = 106 g m o l^{- 1})$

Discussion

16.	How can we identify zero order reaction?
Answer» How can we identify zero order reaction?

Discussion

17.	Change in volume when 100 ml PH3 decomposed to solid phosphorus and H2 gas A.Increase in 50 ml B. Decrease in 50 ml C.increase in 150 ml D. Decrease in 200 ml
Answer» Change in volume when 100 ml PH3 decomposed to solid phosphorus and H2 gas A.Increase in 50 ml B. Decrease in 50 ml C.increase in 150 ml D. Decrease in 200 ml

Discussion

18.	The vapour density of a divalent metal chloride is 59.5 find out equivalent weight of metal nitrate
Answer» The vapour density of a divalent metal chloride is 59.5 find out equivalent weight of metal nitrate

Discussion

19.	Theionization constant of HF, HCOOH and HCN at 298K are 6.8 ×10–4,1.8 × 10–4and 4.8 × 10–9respectively. Calculate the ionization constants of the correspondingconjugate base.
Answer» The ionization constant of HF, HCOOH and HCN at 298K are 6.8 × 10^–4, 1.8 × 10^–4 and 4.8 × 10^–9 respectively. Calculate the ionization constants of the corresponding conjugate base.

Discussion

20.	The intermediate in Cannizaro reaction which is the best hydride donor is :
Answer» The intermediate in Cannizaro reaction which is the best hydride donor is :

Discussion

21.	Which of the following reaction is an example of a redox reaction?
Answer» Which of the following reaction is an example of a redox reaction?

Discussion

22.	A vessel contains 28 gm of N2 and 32 gm of O2, at temperature T=1800 K and pressure 2 atm. Find the pressure if N2 dissociate 30 % and O2 dissociate 50% if temperature remains constant(1) 2 atm(2) 1 atm(3) 2.8 atm(4) 1.4 atm
Answer» A vessel contains 28 gm of N2 and 32 gm of O2, at temperature T=1800 K and pressure 2 atm. Find the pressure if N2 dissociate 30 % and O2 dissociate 50% if temperature remains constant (1) 2 atm (2) 1 atm (3) 2.8 atm (4) 1.4 atm

Discussion

23.	Which of the following regarding alkali metals is not correct?
Answer» Which of the following regarding alkali metals is not correct?

Discussion

24.	21. What is R in Ideal gas equation?
Answer» 21. What is R in Ideal gas equation?

Discussion

25.	In the following reactionAs2S5 + NO--> AsO4з-+ SO42-+ NO2The equivalent weight of As_2S_5, is(1)M/ \lbrack2\rbrack M/6\lbrack3\rbrack M/40
Answer» In the following reactionAs2S5 + NO--> AsO4з-+ SO42-+ NO2The equivalent weight of As_2S_5, is(1)M/ \lbrack2\rbrack M/6\lbrack3\rbrack M/40

Discussion

26.	Why do the thermosetting polymers behave in this way unlike the thermoplastic polymers?
Answer» Why do the thermosetting polymers behave in this way unlike the thermoplastic polymers?

Discussion

27.	Which among the following reactions is not a disproportionation reaction?
Answer» Which among the following reactions is not a disproportionation reaction?

Discussion

28.	In the following questions a statement of assertion (A) followed by a statement of reason (R) is given. Choose the correct answer out of the following choices. (a) Assertion and reason both are true, reason is correct explanation of assertion. (b) Assertion and reason both are true but reason is not the correct explanation of assertion. (c) Assertion is true, reason is false. (d) Assertion is false, reason is true. Assertion (A) Toxic metal ions are removed by the chelating ligands. Reason (R) Chelate complexes tend to be more stable.
Answer» In the following questions a statement of assertion (A) followed by a statement of reason (R) is given. Choose the correct answer out of the following choices. (a) Assertion and reason both are true, reason is correct explanation of assertion. (b) Assertion and reason both are true but reason is not the correct explanation of assertion. (c) Assertion is true, reason is false. (d) Assertion is false, reason is true. Assertion (A) Toxic metal ions are removed by the chelating ligands. Reason (R) Chelate complexes tend to be more stable.

Discussion

29.	The half-life of 198Au is 2.7 days. Calculate the decay constant. Take atomic weight of 198Au to be 198 g mol−1.
Answer» The half-life of $^{198} A u$ is 2.7 days. Calculate the decay constant. Take atomic weight of $^{198} A u$ to be 198 g $m o l^{- 1}$ .

Discussion

30.	When the sample of copper with zinc impurity is to be purified by electrolysis, the appropriate electrodes of cathode and anode are:
Answer» When the sample of copper with zinc impurity is to be purified by electrolysis, the appropriate electrodes of cathode and anode are:

Discussion

31.	5 1-Number of resonating structures of benzene.
Answer» 5 1-Number of resonating structures of benzene.

Discussion

32.	The orbital diagram in which Aufbau principle is violated, is:
Answer» The orbital diagram in which Aufbau principle is violated, is:

Discussion

33.	Among the following metal carbonyls, the CO bond order is the lowest in:
Answer» Among the following metal carbonyls, the $C O$ bond order is the lowest in:

Discussion

34.	pH of 1M HCl i
Answer» pH of 1M HCl i

Discussion

35.	Each carbon atom in benzene is in which state of hybridization?
Answer» Each carbon atom in benzene is in which state of hybridization?

Discussion

36.	3. If the activation energy of a reaction is zero, then the rate constant of this reaction 1) increases with increase in temperature 2)decreases with increase in temperature 3)remains unchanged with temperature 4)cannot be determined exactly.
Answer» 3. If the activation energy of a reaction is zero, then the rate constant of this reaction 1) increases with increase in temperature 2)decreases with increase in temperature 3)remains unchanged with temperature 4)cannot be determined exactly.

Discussion

37.	fe's Electronic configuration is (2,8,8,8) which is stable then why it donates electrons and gain positive charge?
Answer» fe's Electronic configuration is (2,8,8,8) which is stable then why it donates electrons and gain positive charge?

Discussion

38.	Which of the following on hydrolysis forms acetic acid
Answer» Which of the following on hydrolysis forms acetic acid

Discussion

39.	The vapour pressures of ethanol and methanol are 42.0 mm and 88.5 mm Hg, respectively. An ideal solution is formed at the same temperature by mixing 46.0 g of ethanol with 16.0 g of methanol. The mole fraction of ethanol in the vapour is:
Answer» The vapour pressures of ethanol and methanol are $42.0 mm$ and $88.5 mm$ Hg, respectively. An ideal solution is formed at the same temperature by mixing $46.0 g$ of ethanol with $16.0 g$ of methanol. The mole fraction of ethanol in the vapour is:

Discussion

40.	35. Determine the van't hoff factor for the compound Hg2Cl2.
Answer» 35. Determine the van't hoff factor for the compound Hg2Cl2.

Discussion

41.	a meatl forms two oxides. the higher oxide contains 80% metal.0.72g of the lower oxide gave 0.8g of higher oxide when oxidised.then the ratio of the weight of oxygen that combines with the fixed weight of the metal in the two oxides will be
Answer» a meatl forms two oxides. the higher oxide contains 80% metal.0.72g of the lower oxide gave 0.8g of higher oxide when oxidised.then the ratio of the weight of oxygen that combines with the fixed weight of the metal in the two oxides will be

Discussion

42.	The compound X on reaction with HgSO4+H2SO4 gives Y which on oxidation gives acetic acid. X is
Answer» The compound X on reaction with $H g S O_{4} + H_{2} S O_{4}$ gives Y which on oxidation gives acetic acid. X is

Discussion

43.	Except carbonates and bicarbonates for all other oxo salts solubility in water increases down the group for alkali metals . Explain.
Answer» Except carbonates and bicarbonates for all other oxo salts solubility in water increases down the group for alkali metals . Explain.

Discussion

44.	The Lassaigne's extract is boiled with conc. HNO3while testing for halogens. By doing so It:
Answer» The Lassaigne's extract is boiled with conc. HNO₃ while testing for halogens. By doing so It:

Discussion

45.	How many structural isomers can diphenylmethane have when one of the hydrogen atoms is replaced by a chlorine atom?
Answer» How many structural isomers can diphenylmethane have when one of the hydrogen atoms is replaced by a chlorine atom?

Discussion

46.	20.Which of the following favour SN2 reaction most? (1)CH3-Cl (2)CH3-I (3)CH3CH2-I (4)CH3CH2-Cl
Answer» 20.Which of the following favour SN2 reaction most? (1)CH3-Cl (2)CH3-I (3)CH3CH2-I (4)CH3CH2-Cl

Discussion

47.	N2(g)+3H2(g)⇌2NH3(g) is a gaseous phase equilibrium reaction taking place in a 5 litre flask at 1 atm. For this :
Answer» $N_{2} (g) + 3 H_{2} (g) ⇌ 2 N H_{3} (g)$ is a gaseous phase equilibrium reaction taking place in a $5$ litre flask at $1 a t m$ . For this :

Discussion

48.	How many of the following statement(s) is/are correct1.First ionisation energy of Zn is higher than Cu 2.First ionisation energy of Cu is higher than Zn 3.Second ionisation energy of Zn is lesser than Cu 4.Both Zn and Cu has similar first ionisation energy
Answer» How many of the following statement(s) is/are correct 1.First ionisation energy of Zn is higher than Cu 2.First ionisation energy of Cu is higher than Zn 3.Second ionisation energy of Zn is lesser than Cu 4.Both Zn and Cu has similar first ionisation energy

Discussion

49.	81. % of N in HNO3 is
Answer» 81. % of N in HNO3 is

Discussion

50.	In the equation k = A . e-Ea/RT , A is known as
Answer» In the equation k = A . e^-E_a^/RT , A is known as

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

what is the order of magnitude of 5900?

titration is carried out in between N/10 acetic acid and N/10 NaOH .how much difference will be there in pH values of the solutions obtained by 30% and 60% completion of titration

66. How does magnetic moment depend on number of unpaired electrons?

Which of the following reagent is suitable for the preparation of the product in the following reaction?

What are superoxides?

ntON THE BASIS OF FOLLOWING E VALUEn nt[Fe(CN)6]4- GIVES [Fe(CN)6]3- + e E=-0.35n ntFe2+ gives Fe3+ + e E=-0.77n ntSTRONGEST O.A ISn nt1 Fe2+n nt2 Fe3+n nt3 [Fe(CN)6]3-n nt4 [Fe(CN)6]4-n ntn

Tautomerism is not exhibited by :

The ratio of stoichiometric coefficients of triatomic gas to the tetra atomic gas released on thermal decomposition of two moles of ferrous sulphate ?

A valid Lewis structure of which of the following compounds cannot be drawn without violating the octet rule?

Glucose Ag2O→ XGlucose Conc.HNO3→ YX. Y and X respectively are:

For an ideal gas, in an isothermal process

Number of tetrahedral bond angles (i.e. 109^o28') in CH_4 is ? (1) 4 (2) 6 (3) 5 (4) 8

In a certain reaction shown below 4A+2B→3C If rate of formation of C is 9.6×10^{-2} mol/Ls,What will be the rate of reaction?

What is zero order of the reaction??

25.3 g of sodium carbonate, Na2CO3 is dissolved in enough water to make 250 mL of solution. If Sodium carbonate dissociates completely, molar concentration of sodium ion, Na+ and carbonate ions, CO2−3 are respectively (molar mass of Na2CO3=106 g mol−1)

How can we identify zero order reaction?

Change in volume when 100 ml PH3 decomposed to solid phosphorus and H2 gas A.Increase in 50 ml B. Decrease in 50 ml C.increase in 150 ml D. Decrease in 200 ml

The vapour density of a divalent metal chloride is 59.5 find out equivalent weight of metal nitrate

Theionization constant of HF, HCOOH and HCN at 298K are 6.8 ×10–4,1.8 × 10–4and 4.8 × 10–9respectively. Calculate the ionization constants of the correspondingconjugate base.

The intermediate in Cannizaro reaction which is the best hydride donor is :

Which of the following reaction is an example of a redox reaction?

A vessel contains 28 gm of N2 and 32 gm of O2, at temperature T=1800 K and pressure 2 atm. Find the pressure if N2 dissociate 30 % and O2 dissociate 50% if temperature remains constant(1) 2 atm(2) 1 atm(3) 2.8 atm(4) 1.4 atm

Which of the following regarding alkali metals is not correct?

21. What is R in Ideal gas equation?

In the following reactionAs2S5 + NO--> AsO4з-+ SO42-+ NO2The equivalent weight of As_2S_5, is(1)M/ \lbrack2\rbrack M/6\lbrack3\rbrack M/40

Why do the thermosetting polymers behave in this way unlike the thermoplastic polymers?

Which among the following reactions is not a disproportionation reaction?

The half-life of 198Au is 2.7 days. Calculate the decay constant. Take atomic weight of 198Au to be 198 g mol−1.

When the sample of copper with zinc impurity is to be purified by electrolysis, the appropriate electrodes of cathode and anode are:

5 1-Number of resonating structures of benzene.

The orbital diagram in which Aufbau principle is violated, is:

Among the following metal carbonyls, the CO bond order is the lowest in:

pH of 1M HCl i

Each carbon atom in benzene is in which state of hybridization?

3. If the activation energy of a reaction is zero, then the rate constant of this reaction 1) increases with increase in temperature 2)decreases with increase in temperature 3)remains unchanged with temperature 4)cannot be determined exactly.

fe's Electronic configuration is (2,8,8,8) which is stable then why it donates electrons and gain positive charge?

Which of the following on hydrolysis forms acetic acid

The vapour pressures of ethanol and methanol are 42.0 mm and 88.5 mm Hg, respectively. An ideal solution is formed at the same temperature by mixing 46.0 g of ethanol with 16.0 g of methanol. The mole fraction of ethanol in the vapour is:

35. Determine the van't hoff factor for the compound Hg2Cl2.

a meatl forms two oxides. the higher oxide contains 80% metal.0.72g of the lower oxide gave 0.8g of higher oxide when oxidised.then the ratio of the weight of oxygen that combines with the fixed weight of the metal in the two oxides will be

The compound X on reaction with HgSO4+H2SO4 gives Y which on oxidation gives acetic acid. X is

Except carbonates and bicarbonates for all other oxo salts solubility in water increases down the group for alkali metals . Explain.

The Lassaigne's extract is boiled with conc. HNO3while testing for halogens. By doing so It:

How many structural isomers can diphenylmethane have when one of the hydrogen atoms is replaced by a chlorine atom?

20.Which of the following favour SN2 reaction most? (1)CH3-Cl (2)CH3-I (3)CH3CH2-I (4)CH3CH2-Cl

N2(g)+3H2(g)⇌2NH3(g) is a gaseous phase equilibrium reaction taking place in a 5 litre flask at 1 atm. For this :

How many of the following statement(s) is/are correct1.First ionisation energy of Zn is higher than Cu 2.First ionisation energy of Cu is higher than Zn 3.Second ionisation energy of Zn is lesser than Cu 4.Both Zn and Cu has similar first ionisation energy

81. % of N in HNO3 is

In the equation k = A . e-Ea/RT , A is known as