46295 + Interview Questions in Chemistry

1.	The number of molecules in 4.25 g of ammonia is approximately
Answer» The number of molecules in 4.25 g of ammonia is approximately

Discussion

2.	The treatment of benzene with isobutene in the presence of sulphuric acid give(1) -butyl benzene(2) tent -butyl benzene(3) n -butyl benzene(4) No reaction
Answer» The treatment of benzene with isobutene in the presence of sulphuric acid give (1) -butyl benzene (2) tent -butyl benzene (3) n -butyl benzene (4) No reaction

Discussion

3.	The Effective Atomic Number (EAN) of nickel in Ni(CO4) is:
Answer» The Effective Atomic Number (EAN) of nickel in Ni $(C O_{4})$ is:

Discussion

4.	The correct order of decreasing basic strengths of x, y and z is:
Answer» The correct order of decreasing basic strengths of $x, y$ and $z$ is:

Discussion

5.	Gold number of starch is 25. Amount of starch that should be added to 10 mL of Gold sol in presence of 1 mL of 10% NaCl will be
Answer» Gold number of starch is 25. Amount of starch that should be added to 10 mL of Gold sol in presence of 1 mL of $10 %$ NaCl will be

Discussion

6.	Conjuguez les verbes au présent de l'indicatif.
Answer» Conjuguez les verbes au présent de l'indicatif.

Discussion

7.	32.how many bond pair present in NO3-
Answer» 32.how many bond pair present in NO3-

Discussion

8.	The pH of a blood stream is maintained by a proper balance of H2CO3 and NaHCO3. What volume of 2.5 M H2CO3, solution should be mixed with 25 mL of a sample of solution which is 5 M NaHCO3 in order to maintain a pH=7.4. (Take pKa1 for H2CO3=6.7, log 2=0.3, log 5=0.7)
Answer» The $p H$ of a blood stream is maintained by a proper balance of $H_{2} C O_{3}$ and $N a H C O_{3} .$ What volume of $2.5 M$ $H_{2} C O_{3},$ solution should be mixed with $25 mL$ of a sample of solution which is $5 M$ $N a H C O_{3}$ in order to maintain a $p H = 7.4.$ (Take $p K_{a_{1}}$ for $H_{2} C O_{3} = 6.7, l o g 2 = 0.3, l o g 5 = 0.7)$

Discussion

9.	Calculate the average oxidation number of underlined element in the following compound: Mn3−−−O4
Answer» Calculate the average oxidation number of underlined element in the following compound: $M n_{3} - - - O_{4}$

Discussion

10.	How many times 5 occurs from 1-10^5?Explain in detail.
Answer» How many times 5 occurs from 1-10^5? Explain in detail.

Discussion

11.	How are synthetic detergents better than soap?
Answer» How are synthetic detergents better than soap?

Discussion

12.	f(x) =/sqrt{cos(cos x)} Find domain and range of the function ?
Answer» f(x) =/sqrt{cos(cos x)} Find domain and range of the function ?

Discussion

13.	The least stable resonating structure of phenol is :
Answer» The least stable resonating structure of phenol is :

Discussion

14.	B13.Which of the following will be most stable diazonium salt22(a) CH,N2X132C6H5N2(c) CH CH2N2X(d) CeH,CH2N2 X61-5(AIPMT 2014)
Answer» B13.Which of the following will be most stable diazonium salt22(a) CH,N2X132C6H5N2(c) CH CH2N2X(d) CeH,CH2N2 X61-5(AIPMT 2014)

Discussion

15.	If 1/2 X2O(s)--> X(s) + 1/4O2(g); H = 90kJ Then heat change during reaction of metal X with one mole of O2 to form oxide to maximum extent is 1) 360kJ 2) -360 3) -180 4) +180
Answer» If 1/2 X2O(s)--> X(s) + 1/4O2(g); H = 90kJ Then heat change during reaction of metal X with one mole of O2 to form oxide to maximum extent is 1) 360kJ 2) -360 3) -180 4) +180

Discussion

16.	A group of students took an old shoe box and covered it with a black paper from all sides. They fixed a source of light (a torch) at one end of the box by making a hole in it and made another hole on the other side to view the light. They placed a milk sample contained in a beaker/tumbler in the box. They were amazed to see that milk taken in the tumbler was illuminated. They tried the same activity by taking a salt solution but found that light simply passed through it?(a) Explain why the milk sample was illuminated? Name the phenomenon involved.(b) Same results were not observed with a salt solution. Explain.(c) Can you suggest two more solutions which would show the same effect as shown by the milk solution?
Answer» A group of students took an old shoe box and covered it with a black paper from all sides. They fixed a source of light (a torch) at one end of the box by making a hole in it and made another hole on the other side to view the light. They placed a milk sample contained in a beaker/tumbler in the box. They were amazed to see that milk taken in the tumbler was illuminated. They tried the same activity by taking a salt solution but found that light simply passed through it? (a) Explain why the milk sample was illuminated? Name the phenomenon involved. (b) Same results were not observed with a salt solution. Explain. (c) Can you suggest two more solutions which would show the same effect as shown by the milk solution?

Discussion

17.	When sodium peroxide is treated with CO2, it will give:
Answer» When sodium peroxide is treated with $C O_{2}$ , it will give:

Discussion

18.	In a hypothetical universe, if atomic numbers were used to form triads, which of the following will make triad with Na and K?
Answer» In a hypothetical universe, if atomic numbers were used to form triads, which of the following will make triad with Na and K?

Discussion

19.	Which forces are involved in holding the drugs to the active site of enzymes ?
Answer» Which forces are involved in holding the drugs to the active site of enzymes ?

Discussion

20.	23. For HCl solution,at 25 ^° C the equivalent conductivity at infinite dilution is 425 cm2/ohm equi .the specific conductance of a solution of HCl is 3.825/ ohm cm .if the apparent degree of dissociation is 90% .the normality of the solution is
Answer» 23. For HCl solution,at 25 ^° C the equivalent conductivity at infinite dilution is 425 cm2/ohm equi .the specific conductance of a solution of HCl is 3.825/ ohm cm .if the apparent degree of dissociation is 90% .the normality of the solution is

Discussion

21.	what is the equivalent weight of hydride of metal if equivalent weight of its oxide is 20?
Answer» what is the equivalent weight of hydride of metal if equivalent weight of its oxide is 20?

Discussion

22.	The limiting molar conductivity for NaCl,KBr and KCl are 126,152 & 150 S.cm^2mol^-1 respectively.then molar conductivity for NaBr is
Answer» The limiting molar conductivity for NaCl,KBr and KCl are 126,152 & 150 S.cm^2mol^-1 respectively.then molar conductivity for NaBr is

Discussion

23.	If 1 gm water is frozen at 0℃,the value of enthalpy change will be?(∆Hfus=1.435 kcal/mol).
Answer» If 1 gm water is frozen at 0℃,the value of enthalpy change will be?(∆H_fus=1.435 kcal/mol).

Discussion

24.	Can br2 + heat be used on non allylic carbon as well? If yes than what will happen if 1 methyl cyclohexane is treated with br2 in presence of heat?
Answer» Can br2 + heat be used on non allylic carbon as well? If yes than what will happen if 1 methyl cyclohexane is treated with br2 in presence of heat?

Discussion

25.	most stable free radical is 1.CH2=CH-C†extbullet H2 2.Ph-C†extbullet H2 3.(CH3)3C†extbullet 4.†extbullet C2h5
Answer» most stable free radical is 1.CH2=CH-C†extbullet H2 2.Ph-C†extbullet H2 3.(CH3)3C†extbullet 4.†extbullet C2h5

Discussion

26.	A photon and electron have same de-Broglie wavelength. Give that v is the speed of electron and c is the velocity of light. Ee,Ep are the kinetic energy of electron and photon respectively. Pe,Ph are the momentum of electron and photon respectively. Then which of the following relation is correct?
Answer» A photon and electron have same de-Broglie wavelength. Give that $v$ is the speed of electron and $c$ is the velocity of light. $E_{e}, E_{p}$ are the kinetic energy of electron and photon respectively. $P_{e}, P_{h}$ are the momentum of electron and photon respectively. Then which of the following relation is correct?

Discussion

27.	10.Degree of hydrolysis of 0.1 molar nh4cn is 5% . if it is 10 times diluted degree of hydrolysis becomes
Answer» 10.Degree of hydrolysis of 0.1 molar nh4cn is 5% . if it is 10 times diluted degree of hydrolysis becomes

Discussion

28.	A 6.50 molal solution of KOH(aq) has a density of 1.89 g cm−3. The molarity of the solution is mol dm−3. (Round off to the nearest integer).[Atomic masses:K=39.0 u, O=16.0 u, H=1.0 u]
Answer» A $6.50$ molal solution of $K O H (a q)$ has a density of $1.89 {g cm}^{- 3}$ . The molarity of the solution is ${mol dm}^{- 3}$ . (Round off to the nearest integer). $[Atomic masses : K = 39.0 u, O = 16.0 u, H = 1.0 u]$

Discussion

29.	A certain electrode has a reduction potential0.100 V when measured against a standard calome!electrode (anode);calomel- 0.244 V. Potentialversus SHE is
Answer» A certain electrode has a reduction potential0.100 V when measured against a standard calome!electrode (anode);calomel- 0.244 V. Potentialversus SHE is

Discussion

30.	Which of the following is a mixed salt?
Answer» Which of the following is a mixed salt?

Discussion

31.	The correct order of metal-carbon bond strength in the given metal carbonyls is:
Answer» The correct order of metal-carbon bond strength in the given metal carbonyls is:

Discussion

32.	The number of moles of KMnO4 that will be needed to react completely with one mole of ferrous oxalate in acidic solution is
Answer» The number of moles of $K M n O_{4}$ that will be needed to react completely with one mole of ferrous oxalate in acidic solution is

Discussion

33.	the enthaipy of fusion of ice is 6.02 kj/mole the heat capacity of water is 4.18 joule g-1C-1 what is the smallest number of ice cubes at 00C each containing one mole of water that are needed to cool 500 g of liquid water from 20oC - 30oC ans =7 how ?
Answer» the enthaipy of fusion of ice is 6.02 kj/mole the heat capacity of water is 4.18 joule g^-1C^-1 what is the smallest number of ice cubes at 0⁰C each containing one mole of water that are needed to cool 500 g of liquid water from 20^oC - 30^oC ans =7 how ?

33.

the enthaipy of fusion of ice is 6.02 kj/mole the heat capacity of water is 4.18 joule g-1C-1 what is the smallest number of ice cubes at 00C each containing one mole of water that are needed to cool 500 g of liquid water from 20oC - 30oC ans =7 how ?

Answer»

the enthaipy of fusion of ice is 6.02 kj/mole the heat capacity of water is 4.18 joule g^-1C^-1 what is the smallest number of ice cubes at 0⁰C each containing one mole of water that are needed to cool 500 g of liquid water from 20^oC - 30^oC

ans =7 how ?

Discussion

34.	Number of particles in 8gO2 is?
Answer» Number of particles in 8gO₂ is?

Discussion

35.	Elements which occupied position in the Lother meyer curve, on the peaks, were -
Answer» Elements which occupied position in the Lother meyer curve, on the peaks, were -

Discussion

36.	An optically active alcohol A(C6H10O) absorbs two moles of hydrogen per mole of A upon catalytic hydrogenation and gives a product B.The compound B is resistant to oxidation by CrO3 and does not show any optical activity.Deduce the structures of A and B.
Answer» An optically active alcohol A $(C_{6} H_{10} O)$ absorbs two moles of hydrogen per mole of A upon catalytic hydrogenation and gives a product B.The compound B is resistant to oxidation by $C r O_{3}$ and does not show any optical activity.Deduce the structures of A and B.

Discussion

37.	Which among the following is a synthetic polymer?
Answer» Which among the following is a synthetic polymer?

Discussion

38.	If radius of the 27Al13 nucleus is taken to be RAl, then the radius of 125T53 nucleus is nearly.
Answer» If radius of the $^{27} A l_{13}$ nucleus is taken to be $R_{A l}$ , then the radius of $^{125} T_{53}$ nucleus is nearly.

Discussion

39.	x-5/3=x-3/5
Answer» x-5/3=x-3/5

Discussion

40.	Assertion: Strength of the acid or base decreases with dilution.Reason: Ionisation of an acid or a base increases with dilution.Options (1) Both Assertion and Reason are true and reason is the correct explanation of assertion.(2) Both Assertion and Reason are true but reason is not the correct explanation of assertion.(3) Assertion is true but Reason is false(4) Assertion is false but Reason is true
Answer» Assertion: Strength of the acid or base decreases with dilution. Reason: Ionisation of an acid or a base increases with dilution. Options (1) Both Assertion and Reason are true and reason is the correct explanation of assertion. (2) Both Assertion and Reason are true but reason is not the correct explanation of assertion. (3) Assertion is true but Reason is false (4) Assertion is false but Reason is true

Discussion

41.	Reaction mechanism of Diazotisation method of preparation of benzene
Answer» Reaction mechanism of Diazotisation method of preparation of benzene

Discussion

42.	Which solution will show maximum elevation in boiling point?
Answer» Which solution will show maximum elevation in boiling point?

Discussion

43.	Aldehydes when reacted with magnesium what product does it gives.
Answer» Aldehydes when reacted with magnesium what product does it gives.

Discussion

44.	The major product of the following reaction is:CH3CH2CH=CH2H2/CO−−−−−−−→Rh catalyst
Answer» The major product of the following reaction is: $C H_{3} C H_{2} C H = C H_{2} H_{2} / C O - ------ \to R h catalyst$

Discussion

45.	A mixture of ethane and ethene occupies 41L at 1atm and 500K. The mixture completely reacts with 10/3 mole of O2 to produce CO2 and H2O.The mole fractions of ethane and ethene in the mixture are respectively
Answer» A mixture of ethane and ethene occupies 41L at 1atm and 500K. The mixture completely reacts with 10/3 mole of O2 to produce CO2 and H2O.The mole fractions of ethane and ethene in the mixture are respectively

Discussion

46.	Assume the following reaction is carried out in acidic medium. 6e−+Cr2O72−⟶2Cr3++7H2OHow many H+ do we need to add to the LHS to balance the H atoms?
Answer» Assume the following reaction is carried out in acidic medium. $6 e^{-} + C r_{2} {O_{7}}^{2 -} ⟶ 2 {C r}^{3 +} + 7 H_{2} O$ How many $H^{+}$ do we need to add to the LHS to balance the H atoms?

Discussion

47.	An object has an excess charge of -1.92×10^{-7 C. How many excess electrons does it have?
Answer» An object has an excess charge of -1.92×10^{-7 C. How many excess electrons does it have?

Discussion

48.	A compound 'X' of sodium is used for removing permanent hardness of water.(a)Name the compound and write it's chemical formula.(b)What happens when crystals of 'X' are heated? Write the balanced chemical equation.(c)Write any two physical properties of X.
Answer» A compound 'X' of sodium is used for removing permanent hardness of water. (a)Name the compound and write it's chemical formula. (b)What happens when crystals of 'X' are heated? Write the balanced chemical equation. (c)Write any two physical properties of X.

Discussion

49.	The heat of formation of ethylene is 12.5 kcal. Calculate C=C bond energy in ethylene from the following data. Heat of atomisation of C=170.1 kcal/mole, heat of atomisation of H=52.1 kcal/mole, bond energy of C-H=99.3 kcal/mole.
Answer» The heat of formation of ethylene is 12.5 kcal. Calculate C=C bond energy in ethylene from the following data. Heat of atomisation of C=170.1 kcal/mole, heat of atomisation of H=52.1 kcal/mole, bond energy of C-H=99.3 kcal/mole.

Discussion

50.	ntIf 2a= 3b= 6cthen show that c = ab/a+bn
Answer» ntIf 2a= 3b= 6cthen show that c = ab/a+bn

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The number of molecules in 4.25 g of ammonia is approximately

The treatment of benzene with isobutene in the presence of sulphuric acid give(1) -butyl benzene(2) tent -butyl benzene(3) n -butyl benzene(4) No reaction

The Effective Atomic Number (EAN) of nickel in Ni(CO4) is:

The correct order of decreasing basic strengths of x, y and z is:

Gold number of starch is 25. Amount of starch that should be added to 10 mL of Gold sol in presence of 1 mL of 10% NaCl will be

Conjuguez les verbes au présent de l'indicatif.

32.how many bond pair present in NO3-

The pH of a blood stream is maintained by a proper balance of H2CO3 and NaHCO3. What volume of 2.5 M H2CO3, solution should be mixed with 25 mL of a sample of solution which is 5 M NaHCO3 in order to maintain a pH=7.4. (Take pKa1 for H2CO3=6.7, log 2=0.3, log 5=0.7)

Calculate the average oxidation number of underlined element in the following compound: Mn3−−−O4

How many times 5 occurs from 1-10^5?Explain in detail.

How are synthetic detergents better than soap?

f(x) =/sqrt{cos(cos x)} Find domain and range of the function ?

The least stable resonating structure of phenol is :

B13.Which of the following will be most stable diazonium salt22(a) CH,N2X132C6H5N2(c) CH CH2N2X(d) CeH,CH2N2 X61-5(AIPMT 2014)

If 1/2 X2O(s)--> X(s) + 1/4O2(g); H = 90kJ Then heat change during reaction of metal X with one mole of O2 to form oxide to maximum extent is 1) 360kJ 2) -360 3) -180 4) +180

When sodium peroxide is treated with CO2, it will give:

In a hypothetical universe, if atomic numbers were used to form triads, which of the following will make triad with Na and K?

Which forces are involved in holding the drugs to the active site of enzymes ?

23. For HCl solution,at 25 ^° C the equivalent conductivity at infinite dilution is 425 cm2/ohm equi .the specific conductance of a solution of HCl is 3.825/ ohm cm .if the apparent degree of dissociation is 90% .the normality of the solution is

what is the equivalent weight of hydride of metal if equivalent weight of its oxide is 20?

The limiting molar conductivity for NaCl,KBr and KCl are 126,152 &amp; 150 S.cm^2mol^-1 respectively.then molar conductivity for NaBr is

If 1 gm water is frozen at 0℃,the value of enthalpy change will be?(∆Hfus=1.435 kcal/mol).

Can br2 + heat be used on non allylic carbon as well? If yes than what will happen if 1 methyl cyclohexane is treated with br2 in presence of heat?

most stable free radical is 1.CH2=CH-C†extbullet H2 2.Ph-C†extbullet H2 3.(CH3)3C†extbullet 4.†extbullet C2h5

A photon and electron have same de-Broglie wavelength. Give that v is the speed of electron and c is the velocity of light. Ee,Ep are the kinetic energy of electron and photon respectively. Pe,Ph are the momentum of electron and photon respectively. Then which of the following relation is correct?

10.Degree of hydrolysis of 0.1 molar nh4cn is 5% . if it is 10 times diluted degree of hydrolysis becomes

A 6.50 molal solution of KOH(aq) has a density of 1.89 g cm−3. The molarity of the solution is mol dm−3. (Round off to the nearest integer).[Atomic masses:K=39.0 u, O=16.0 u, H=1.0 u]

A certain electrode has a reduction potential0.100 V when measured against a standard calome!electrode (anode);calomel- 0.244 V. Potentialversus SHE is

Which of the following is a mixed salt?

The correct order of metal-carbon bond strength in the given metal carbonyls is:

The number of moles of KMnO4 that will be needed to react completely with one mole of ferrous oxalate in acidic solution is

the enthaipy of fusion of ice is 6.02 kj/mole the heat capacity of water is 4.18 joule g-1C-1 what is the smallest number of ice cubes at 00C each containing one mole of water that are needed to cool 500 g of liquid water from 20oC - 30oC ans =7 how ?

Number of particles in 8gO2 is?

Elements which occupied position in the Lother meyer curve, on the peaks, were -

An optically active alcohol A(C6H10O) absorbs two moles of hydrogen per mole of A upon catalytic hydrogenation and gives a product B.The compound B is resistant to oxidation by CrO3 and does not show any optical activity.Deduce the structures of A and B.

Which among the following is a synthetic polymer?

If radius of the 27Al13 nucleus is taken to be RAl, then the radius of 125T53 nucleus is nearly.

x-5/3=x-3/5

Reaction mechanism of Diazotisation method of preparation of benzene

Which solution will show maximum elevation in boiling point?

Aldehydes when reacted with magnesium what product does it gives.

The major product of the following reaction is:CH3CH2CH=CH2H2/CO−−−−−−−→Rh catalyst

A mixture of ethane and ethene occupies 41L at 1atm and 500K. The mixture completely reacts with 10/3 mole of O2 to produce CO2 and H2O.The mole fractions of ethane and ethene in the mixture are respectively

Assume the following reaction is carried out in acidic medium. 6e−+Cr2O72−⟶2Cr3++7H2OHow many H+ do we need to add to the LHS to balance the H atoms?

An object has an excess charge of -1.92×10^{-7 C. How many excess electrons does it have?

A compound 'X' of sodium is used for removing permanent hardness of water.(a)Name the compound and write it's chemical formula.(b)What happens when crystals of 'X' are heated? Write the balanced chemical equation.(c)Write any two physical properties of X.

The heat of formation of ethylene is 12.5 kcal. Calculate C=C bond energy in ethylene from the following data. Heat of atomisation of C=170.1 kcal/mole, heat of atomisation of H=52.1 kcal/mole, bond energy of C-H=99.3 kcal/mole.

ntIf 2a= 3b= 6cthen show that c = ab/a+bn

The limiting molar conductivity for NaCl,KBr and KCl are 126,152 & 150 S.cm^2mol^-1 respectively.then molar conductivity for NaBr is