46295 + Interview Questions in Chemistry

1.	If L,M,N are physical quantities with different dimensions, then which of the following combinations can never be meaningful quantity?(1.) LM/N (2.) LN - M(3.) LN - M^2/N (4.) L - M/N
Answer» If L,M,N are physical quantities with different dimensions, then which of the following combinations can never be meaningful quantity? (1.) LM/N (2.) LN - M (3.) LN - M^2/N (4.) L - M/N

Discussion

2.	Find out the solubility of Mg(OH)2 in 0.1 M NaOH. Given that solubility product of Mg(OH)2 is 1.8×10–11.
Answer» Find out the solubility of $M g (O H)_{2}$ in $0.1 M N a O H$ . Given that solubility product of $M g (O H)_{2}$ is $1.8 \times 10^{- 11}$ .

Discussion

3.	hybridization of SbCl_5^{2-
Answer» hybridization of SbCl_5^{2-

Discussion

4.	Two closed bulbs of equal volume (V) containing an ideal gas initially at pressure Pi and temperature T1 are connected through a narrow tube of negligible volume as shown in the figure below. The temperature of one of the bulbs is then raised to T2. The final pressure pf is :
Answer» Two closed bulbs of equal volume $(V)$ containing an ideal gas initially at pressure $P_{i}$ and temperature $T_{1}$ are connected through a narrow tube of negligible volume as shown in the figure below. The temperature of one of the bulbs is then raised to $T_{2}$ . The final pressure $p_{f}$ is :

Discussion

5.	5×10−3 mol of a solution containing an ion An+ require 3×10−3 mol of MnO−4 for the oxidation of An+ to AO−3 in acidic medium. What is the value of n?
Answer» $5 \times 10^{- 3} mol$ of a solution containing an ion $A^{n +}$ require $3 \times 10^{- 3} mol$ of $M n O_{4}^{-}$ for the oxidation of $A^{n +}$ to $A O_{3}^{-}$ in acidic medium. What is the value of $n$ ?

Discussion

6.	Two moles of an ideal monoatomic gas are allowed to expand adiabatically and reversibly from 300 K to 200 K. The work done during the expansion is (approx.)
Answer» Two moles of an ideal monoatomic gas are allowed to expand adiabatically and reversibly from $300 K t o 200 K .$ The work done during the expansion is (approx.)

Discussion

7.	when 1.0ml of nacl is doped with 10^-3 mol srcl2 the no of cationic sites remaining vacant is 10^-3
Answer» when 1.0ml of nacl is doped with 10^-3 mol srcl2 the no of cationic sites remaining vacant is 10^-3

Discussion

8.	CH3-O-CH2CH3 + HBr give ACH3-O-CH2CH3 + HI give BCH3-O-CH(CH3)2 + HI give CCH3-O-CH(CH3)2 + HBr give DCH3-O- C(CH3)3 +HI give E CH3-O-C(CH3)3 + HBr give FFind A,B , C ,D ,E ,F a
Answer» CH3-O-CH2CH3 + HBr give ACH3-O-CH2CH3 + HI give BCH3-O-CH(CH3)2 + HI give CCH3-O-CH(CH3)2 + HBr give DCH3-O- C(CH3)3 +HI give E CH3-O-C(CH3)3 + HBr give FFind A,B , C ,D ,E ,F a

Discussion

9.	Describethe hybridisation in case of PCl5.Why are the axial bonds longer as compared to equatorial bonds?
Answer» Describe the hybridisation in case of PCl₅. Why are the axial bonds longer as compared to equatorial bonds?

Discussion

10.	Calculate the equilibrium concentration ratio of C to A, if 3 mol each of A and B are allowed to come to equilibrium at 298 K.A (g)+B (g)⇌C (g)+D (g)ΔG∘=−1380 cal/mol
Answer» Calculate the equilibrium concentration ratio of $C t o A$ , if $3$ mol each of $A$ and $B$ are allowed to come to equilibrium at $298 K$ . $A (g) + B (g) ⇌ C (g) + D (g)$ $Δ G^{\circ} = - 1380 c a l / m o l$

Discussion

11.	K_2C_2O_7+H_2SO_4+SO_2→ K_2SO_4+Cr_2(S0_4)_3+H_2O Balance the equation.
Answer» K_2C_2O_7+H_2SO_4+SO_2→ K_2SO_4+Cr_2(S0_4)_3+H_2O Balance the equation.

Discussion

12.	The ease of hydrolysis in the compounds CH_3COCl(1),CH_3-CO-O-COCH_3(2),CH_3COOC_2H_5(3) & CH_3CONH_2(4) is of tyhe order- (a)1>2>3>4 (b)4>3>2>1 (c)1>2>4>3 (d)2>1>4>3
Answer» The ease of hydrolysis in the compounds CH_3COCl(1),CH_3-CO-O-COCH_3(2),CH_3COOC_2H_5(3) & CH_3CONH_2(4) is of tyhe order- (a)1>2>3>4 (b)4>3>2>1 (c)1>2>4>3 (d)2>1>4>3

Discussion

13.	The emf of the following cells are: Ag\|Ag+(1M) \|\| Cu2+(1M)\|Cu Ecell=−0.46V and Zn\|Zn2+(1M) \|\| Cu2+(1M)\|Cu Ecell=+1.10V. Then the emf of the cell Zn\|Zn2+(1M) \|\| Ag+(1M)\|Ag is:
Answer» The emf of the following cells are: $A g \| A g^{+} (1 M) \| \| C u^{2 +} (1 M) \| C u E_{c e l l} = - 0.46 V a n d$ $Z n \| Z n^{2 +} (1 M) \| \| C u^{2 +} (1 M) \| C u E_{c e l l} = + 1.10 V .$ Then the emf of the cell $Z n \| Z n^{2 +} (1 M) \| \| A g^{+} (1 M) \| A g$ is:

Discussion

14.	Match the following addition statements to their correct results:
Answer» Match the following addition statements to their correct results:

Discussion

15.	22. which is more stable and why Cr(+2) or Mn(+2)
Answer» 22. which is more stable and why Cr(+2) or Mn(+2)

Discussion

16.	Write the name and structures of the monomers of the following polymers. Buna - S Buna - N Dacron Neoprene
Answer» Write the name and structures of the monomers of the following polymers. Buna - S Buna - N Dacron Neoprene

16.

Write the name and structures of the monomers of the following polymers. Buna - S Buna - N Dacron Neoprene

Answer»

Write the name and structures of the monomers of the following polymers.

Buna - S

Buna - N

Dacron

Neoprene

Discussion

17.	in which of the following reaction k_p>k_c PCl3+Cl2-PCl5 H2+ I2-2HI 2SO3-O2+2SO2 N2 +3H2-2NH
Answer» in which of the following reaction k_p>k_c PCl3+Cl2-PCl5 H2+ I2-2HI 2SO3-O2+2SO2 N2 +3H2-2NH

Discussion

18.	The group which is predominantly ortho/para directing when attached to a benzene ring is :
Answer» The group which is predominantly ortho/para directing when attached to a benzene ring is :

Discussion

19.	How avagadros hypothesis help to determine weight of gaseous elements and how it is used to determine molecular formulae of gases and in gas analysis
Answer» How avagadros hypothesis help to determine weight of gaseous elements and how it is used to determine molecular formulae of gases and in gas analysis

Discussion

20.	The rise of liquid in a capillary tube is due to:
Answer» The rise of liquid in a capillary tube is due to:

Discussion

21.	Which of the following pairs of compounds is a pair of enantiomers ?
Answer» Which of the following pairs of compounds is a pair of enantiomers ?

Discussion

22.	A sample of hydrogen atoms in ground state is exposed to electromagnetic radiation of 1019 oA. The wavelengths of the induced radiation(s) (radiations emitted when electron returns to the ground state) is/are:(Given, R=1.09×107 m−1)
Answer» A sample of hydrogen atoms in ground state is exposed to electromagnetic radiation of $1019 o A$ . The wavelengths of the induced radiation(s) (radiations emitted when electron returns to the ground state) is/are: $(Given, R = 1.09 \times 10^{7} m^{- 1})$

Discussion

23.	aromatic compounds undergo which type of reaction, sn1 or sn
Answer» aromatic compounds undergo which type of reaction, sn1 or sn

Discussion

24.	Two compounds A and B forms non-volatile compounds having molecular formulae AB2 and AB4. when 1 g of AB2 and 1g of AB4 are separately dissolved in 20 g of Benzene, the B.P. was lowered by 2.3∘C and 1.3∘C respectively. Find the molar mass of A and B. kb of Benzene is S.1 k kg/mol
Answer» Two compounds A and B forms non-volatile compounds having molecular formulae $A B_{2}$ and $A B_{4}$ . when 1 g of $A B_{2}$ and 1g of $A B_{4}$ are separately dissolved in 20 g of Benzene, the B.P. was lowered by ${2.3}^{\circ} C$ and ${1.3}^{\circ} C$ respectively. Find the molar mass of A and B. $k_{b}$ of Benzene is S.1 k kg/mol

Discussion

25.	why 1000 have infinite significant figures
Answer» why 1000 have infinite significant figures

Discussion

26.	If Azimuthal quantum number has possible values from 0 to n+1 and there are 3 possible values for spin quantum number (+12, 0, −12), then maximum number of electrons which can be filled into 3rd orbit are:
Answer» If Azimuthal quantum number has possible values from $0$ to $n + 1$ and there are $3$ possible values for spin quantum number $(+ \frac{1}{2}, 0, - \frac{1}{2})$ , then maximum number of electrons which can be filled into $3$ rd orbit are:

Discussion

27.	6. Bonding and oxidation state of oxygen in Hydrogen peroxide. Is hydrogen--oxygen bond is ionic in Hydrogen peroxide?
Answer» 6. Bonding and oxidation state of oxygen in Hydrogen peroxide. Is hydrogen--oxygen bond is ionic in Hydrogen peroxide?

Discussion

28.	What is the conc. of acetic acid that must be added to 0.5M HCOOH solution so that the dissociation of both acids is the same? [An example of Isohydric solutions] Ka of acetic acid 1.8×10−5,Ka of formic acid = 2.4×10−4
Answer» What is the conc. of acetic acid that must be added to 0.5M HCOOH solution so that the dissociation of both acids is the same? [An example of Isohydric solutions] $K_{a}$ of acetic acid $1.8 \times 10^{- 5}, K_{a}$ of formic acid = $2.4 \times 10^{- 4}$

Discussion

29.	Write the type of hybridisation of each of the carbon atom in the following structures: (i) ch2=c=ch2 (ii) ch3-ch=ch-ch3
Answer» Write the type of hybridisation of each of the carbon atom in the following structures: (i) ch2=c=ch2 (ii) ch3-ch=ch-ch3

Discussion

30.	a gas has specific heat 0.0075 cal at cons†an t volume and formula weight 40. find atomicity of the gas
Answer» a gas has specific heat 0.0075 cal at cons†an t volume and formula weight 40. find atomicity of the gas

Discussion

31.	what is g1 phase
Answer» what is g1 phase

Discussion

32.	When temperature is increased by 100°c, then fractional change in numerical value becomes equal to 0.005%. Given, α of measuring object, α｡=2×10^-5. Calculate α of the scale.
Answer» When temperature is increased by 100°c, then fractional change in numerical value becomes equal to 0.005%. Given, α of measuring object, α｡=2×10^-5. Calculate α of the scale.

Discussion

33.	The number of octahedral sites per sphere in a fcc structure
Answer» The number of octahedral sites per sphere in a fcc structure

Discussion

34.	which atoms are the electron donors in dimethylglyoxime (bidentate ligand)?
Answer» which atoms are the electron donors in dimethylglyoxime (bidentate ligand)?

Discussion

35.	When NaOH is prepared, the gas released is
Answer» When NaOH is prepared, the gas released is

Discussion

36.	The Van der Waal's Equation for 'n' moles of a real gas will be :
Answer» The Van der Waal's Equation for 'n' moles of a real gas will be :

Discussion

37.	What is homology series
Answer» What is homology series

Discussion

38.	When SO2 is passed into an acidified potassium dichromate solution, the oxidation numbers of S and Cr in the final products respectively area) +6,-3b) +2,+3c) 0,+3d) +6,+3
Answer» When SO2 is passed into an acidified potassium dichromate solution, the oxidation numbers of S and Cr in the final products respectively are a) +6,-3 b) +2,+3 c) 0,+3 d) +6,+3

Discussion

39.	Let the PE of hydrogen atom in the ground state be zero.Then its total energy in the first excite state will be
Answer» Let the PE of hydrogen atom in the ground state be zero. Then its total energy in the first excite state will be

Discussion

40.	An organic acid P C11H12O2 can easily be oxidized to a dibasic acid which reacts with ethylene glycol to produce a polymer dacron. Upon ozonolysis, P gives an aliphatic ketone as one of the products. P undergoes the following reaction sequences to furnish R via Q. The compound P also undergoes another set of reactions to produce S. The compound S is :
Answer» An organic acid P $C_{11} H_{12} O_{2}$ can easily be oxidized to a dibasic acid which reacts with ethylene glycol to produce a polymer dacron. Upon ozonolysis, P gives an aliphatic ketone as one of the products. P undergoes the following reaction sequences to furnish R via Q. The compound P also undergoes another set of reactions to produce S. The compound S is :

Discussion

41.	Ammonia under a pressure of 15 atm at 270C is heated to 3470C in a closed vessel in the presence of catalyst. Under the conditions, NH3 is partially decomposed according to theequation, 2NH3N2+3H2. The vessel is such that the volume remainseffectively constant whereas pressure increases to 50 atm. Calculate the percentage of NH3 actually decomposed.
Answer» Ammonia under a pressure of 15 atm at 27⁰C is heated to 347⁰C in a closed vessel in the presence of catalyst. Under the conditions, NH₃ is partially decomposed according to the equation, 2NH₃N₂+3H₂. The vessel is such that the volume remains effectively constant whereas pressure increases to 50 atm. Calculate the percentage of NH₃ actually decomposed.

41.

Ammonia under a pressure of 15 atm at 270C is heated to 3470C in a closed vessel in the presence of catalyst. Under the conditions, NH3 is partially decomposed according to theequation, 2NH3N2+3H2. The vessel is such that the volume remainseffectively constant whereas pressure increases to 50 atm. Calculate the percentage of NH3 actually decomposed.

Answer»

Ammonia under a pressure of 15 atm at 27⁰C is heated to 347⁰C in a closed vessel in the presence of catalyst. Under the conditions, NH₃ is partially decomposed according to the

equation, 2NH₃N₂+3H₂. The vessel is such that the volume remains

effectively constant whereas pressure increases to 50 atm. Calculate the percentage of NH₃ actually decomposed.

Discussion

42.	The increasing order of atomic radii of group 13 elements is:
Answer» The increasing order of atomic radii of group $13$ elements is:

Discussion

43.	The following are examples of a/an:
Answer» The following are examples of a/an:

Discussion

44.	why benzoic acid is more acidic than acetic aci
Answer» why benzoic acid is more acidic than acetic aci

Discussion

45.	what will be the total Number of final products formed whn acetaldehyde is reacted with OH-(hydroxide ion) and heated?
Answer» what will be the total Number of final products formed whn acetaldehyde is reacted with OH-(hydroxide ion) and heated?

Discussion

46.	why is lead not affected by dilute hcl in cold???
Answer» why is lead not affected by dilute hcl in cold???

Discussion

47.	What is dipole
Answer» What is dipole

Discussion

48.	22. Why does magnesium doesn't displace hydrogen from a boiling caustic soda solution?
Answer» 22. Why does magnesium doesn't displace hydrogen from a boiling caustic soda solution?

Discussion

49.	Find the distance and displacement
Answer» Find the distance and displacement

Discussion

50.	The percentage composition in a sample of CaCO3 is given as: Ca=40%;C=12%;O=48%. What will be the weight of Ca in 4 g of a sample of CaCO3 obtained from another source, if the law of constant proportions is true?
Answer» The percentage composition in a sample of $C a C O_{3}$ is given as: $C a = 40 %; C = 12 %; O = 48 %$ . What will be the weight of $C a$ in $4 g$ of a sample of $C a C O_{3}$ obtained from another source, if the law of constant proportions is true?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

If L,M,N are physical quantities with different dimensions, then which of the following combinations can never be meaningful quantity?(1.) LM/N (2.) LN - M(3.) LN - M^2/N (4.) L - M/N

Find out the solubility of Mg(OH)2 in 0.1 M NaOH. Given that solubility product of Mg(OH)2 is 1.8×10–11.

hybridization of SbCl_5^{2-

Two closed bulbs of equal volume (V) containing an ideal gas initially at pressure Pi and temperature T1 are connected through a narrow tube of negligible volume as shown in the figure below. The temperature of one of the bulbs is then raised to T2. The final pressure pf is :

5×10−3 mol of a solution containing an ion An+ require 3×10−3 mol of MnO−4 for the oxidation of An+ to AO−3 in acidic medium. What is the value of n?

Two moles of an ideal monoatomic gas are allowed to expand adiabatically and reversibly from 300 K to 200 K. The work done during the expansion is (approx.)

when 1.0ml of nacl is doped with 10^-3 mol srcl2 the no of cationic sites remaining vacant is 10^-3

CH3-O-CH2CH3 + HBr give ACH3-O-CH2CH3 + HI give BCH3-O-CH(CH3)2 + HI give CCH3-O-CH(CH3)2 + HBr give DCH3-O- C(CH3)3 +HI give E CH3-O-C(CH3)3 + HBr give FFind A,B , C ,D ,E ,F a

Describethe hybridisation in case of PCl5.Why are the axial bonds longer as compared to equatorial bonds?

Calculate the equilibrium concentration ratio of C to A, if 3 mol each of A and B are allowed to come to equilibrium at 298 K.A (g)+B (g)⇌C (g)+D (g)ΔG∘=−1380 cal/mol

K_2C_2O_7+H_2SO_4+SO_2→ K_2SO_4+Cr_2(S0_4)_3+H_2O Balance the equation.

The ease of hydrolysis in the compounds CH_3COCl(1),CH_3-CO-O-COCH_3(2),CH_3COOC_2H_5(3) & CH_3CONH_2(4) is of tyhe order- (a)1>2>3>4 (b)4>3>2>1 (c)1>2>4>3 (d)2>1>4>3

The emf of the following cells are: Ag|Ag+(1M) || Cu2+(1M)|Cu Ecell=−0.46V and Zn|Zn2+(1M) || Cu2+(1M)|Cu Ecell=+1.10V. Then the emf of the cell Zn|Zn2+(1M) || Ag+(1M)|Ag is:

Match the following addition statements to their correct results:

22. which is more stable and why Cr(+2) or Mn(+2)

Write the name and structures of the monomers of the following polymers. Buna - S Buna - N Dacron Neoprene

in which of the following reaction k_p>k_c PCl3+Cl2-PCl5 H2+ I2-2HI 2SO3-O2+2SO2 N2 +3H2-2NH

The group which is predominantly ortho/para directing when attached to a benzene ring is :

How avagadros hypothesis help to determine weight of gaseous elements and how it is used to determine molecular formulae of gases and in gas analysis

The rise of liquid in a capillary tube is due to:

Which of the following pairs of compounds is a pair of enantiomers ?

A sample of hydrogen atoms in ground state is exposed to electromagnetic radiation of 1019 oA. The wavelengths of the induced radiation(s) (radiations emitted when electron returns to the ground state) is/are:(Given, R=1.09×107 m−1)

aromatic compounds undergo which type of reaction, sn1 or sn

Two compounds A and B forms non-volatile compounds having molecular formulae AB2 and AB4. when 1 g of AB2 and 1g of AB4 are separately dissolved in 20 g of Benzene, the B.P. was lowered by 2.3∘C and 1.3∘C respectively. Find the molar mass of A and B. kb of Benzene is S.1 k kg/mol

why 1000 have infinite significant figures

If Azimuthal quantum number has possible values from 0 to n+1 and there are 3 possible values for spin quantum number (+12, 0, −12), then maximum number of electrons which can be filled into 3rd orbit are:

6. Bonding and oxidation state of oxygen in Hydrogen peroxide. Is hydrogen--oxygen bond is ionic in Hydrogen peroxide?

What is the conc. of acetic acid that must be added to 0.5M HCOOH solution so that the dissociation of both acids is the same? [An example of Isohydric solutions] Ka of acetic acid 1.8×10−5,Ka of formic acid = 2.4×10−4

Write the type of hybridisation of each of the carbon atom in the following structures: (i) ch2=c=ch2 (ii) ch3-ch=ch-ch3

a gas has specific heat 0.0075 cal at cons†an t volume and formula weight 40. find atomicity of the gas

what is g1 phase

When temperature is increased by 100°c, then fractional change in numerical value becomes equal to 0.005%. Given, α of measuring object, α｡=2×10^-5. Calculate α of the scale.

The number of octahedral sites per sphere in a fcc structure

which atoms are the electron donors in dimethylglyoxime (bidentate ligand)?

When NaOH is prepared, the gas released is

The Van der Waal's Equation for 'n' moles of a real gas will be :

What is homology series

When SO2 is passed into an acidified potassium dichromate solution, the oxidation numbers of S and Cr in the final products respectively area) +6,-3b) +2,+3c) 0,+3d) +6,+3

Let the PE of hydrogen atom in the ground state be zero.Then its total energy in the first excite state will be

The increasing order of atomic radii of group 13 elements is:

The following are examples of a/an:

why benzoic acid is more acidic than acetic aci

what will be the total Number of final products formed whn acetaldehyde is reacted with OH-(hydroxide ion) and heated?

why is lead not affected by dilute hcl in cold???

What is dipole

22. Why does magnesium doesn't displace hydrogen from a boiling caustic soda solution?

Find the distance and displacement

The percentage composition in a sample of CaCO3 is given as: Ca=40%;C=12%;O=48%. What will be the weight of Ca in 4 g of a sample of CaCO3 obtained from another source, if the law of constant proportions is true?