46295 + Interview Questions in Chemistry

1.	In both crystalline NaHCO3 and KHCO3,HCO3- forms only dimeric anion through hydrogen bond.justify this statement.
Answer» In both crystalline NaHCO3 and KHCO3,HCO3- forms only dimeric anion through hydrogen bond.justify this statement.

Discussion

2.	For CaCO3(s)--CaO(s)+CO2(g) at 977°C ∆H=174KJ/mol ;then ∆E is
Answer» For CaCO3(s)--CaO(s)+CO2(g) at 977°C ∆H=174KJ/mol ;then ∆E is

Discussion

3.	26 g of acetylene gas is passed through hot Fe tube. Then the number of molecules of benzene obtained are
Answer» 26 g of acetylene gas is passed through hot Fe tube. Then the number of molecules of benzene obtained are

Discussion

4.	What is the correct Bond-line structure of the condensed structure given below ? CH3CONHCH2OCH3
Answer» What is the correct Bond-line structure of the condensed structure given below ? $C H_{3} C O N H C H_{2} O C H_{3}$

Discussion

5.	Iron crystallizes as face centred cube. Its density is 2.8 g/cm3. If the volume of the unit cell is 56.38x10-24 cm3, calculate the mass of one atom.
Answer» Iron crystallizes as face centred cube. Its density is 2.8 g/cm³. If the volume of the unit cell is 56.38x10^-24 cm³, calculate the mass of one atom.

Discussion

6.	How to relate the stability of carbonates along group and period??
Answer» How to relate the stability of carbonates along group and period??

Discussion

7.	The correct order of boiling points of HF , HCl , HBr and HI is
Answer» The correct order of boiling points of HF , HCl , HBr and HI is

Discussion

8.	Find the final temperature of one mole of an ideal gas which has an initial temperature t K. The gas does 9 R joules of work adiabatically. The ratio of specific heats of this gas at constant pressure and at constant volume is 4/3.
Answer» Find the final temperature of one mole of an ideal gas which has an initial temperature t K. The gas does 9 R joules of work adiabatically. The ratio of specific heats of this gas at constant pressure and at constant volume is 4/3.

Discussion

9.	Among the following molecules octet rule is not obeyed by:
Answer» Among the following molecules octet rule is not obeyed by:

Discussion

10.	The correct relationship between wave numbers of spectral lines, in Balmer series of hydrogen atom having the least and highest wave - lengths, is given by
Answer» The correct relationship between wave numbers of spectral lines, in Balmer series of hydrogen atom having the least and highest wave - lengths, is given by

Discussion

11.	Calculate the momentum of a particle which has a de Broglie wavelength of 4.5×10−10 m. (Planck's constant, h=6.6×10−34 kgm2s−1)
Answer» Calculate the momentum of a particle which has a de Broglie wavelength of $4.5 \times 10^{- 10} m$ . $(Planck's constant, h = 6.6 \times 10^{- 34} k g m^{2} s^{- 1})$

Discussion

12.	The Oxidation potential of hydrogen electrode at PH=10 and PH2 at 1atm is :
Answer» The Oxidation potential of hydrogen electrode at $P^{H} = 10$ and $P_{H_{2}}$ at 1atm is :

Discussion

13.	In the compound CH2=CH−CH2−CH2−C≡CH,the C2−C3 bond is of the type
Answer» In the compound $C H_{2} = C H - C H_{2} - C H_{2} - C \equiv C H$ ,the $C_{2} - C_{3}$ bond is of the type

Discussion

14.	Why couldn't VSEPRT explain the bond strength?
Answer» Why couldn't VSEPRT explain the bond strength?

Discussion

15.	Si3O6−9(having three tetrahedral units) is represented as :
Answer» $S i_{3} O_{9}^{6 -}$ (having three tetrahedral units) is represented as :

Discussion

16.	At what temperature will the average speed of CH4 molecules have the same value as O2 has at 300 K
Answer» At what temperature will the average speed of $C H_{4}$ molecules have the same value as $O_{2}$ has at 300 K

Discussion

17.	Volume of the air that will be expelled from a vessel of 300 cm3 when it is heated from 27∘C to 37∘C at the same pressure will be
Answer» Volume of the air that will be expelled from a vessel of 300 ${c m}^{3}$ when it is heated from $27^{\circ}$ C to $37^{\circ}$ C at the same pressure will be

Discussion

18.	The major product formed in the following reaction CH3CH(Cl)CH2−CH2OHaq.KOH−−−−−→
Answer» The major product formed in the following reaction $C H_{3} C H (C l) C H_{2} - C H_{2} O H a q . K O H - ---- \to$

Discussion

19.	Solid CO2 is an example of
Answer» Solid CO₂is an example of

Discussion

20.	At 363K, pure water has [H3O+]=10−6M. The value of Kw at this temperature will be
Answer» At 363K, pure water has $[H_{3} O^{+}] = 10^{- 6} M$ . The value of Kw at this temperature will be

Discussion

21.	Calculate the lattice energy of a salt MX(s) from the data given below: Heat of formation of MX(ΔH)=−550 kJ/mol Heat of sublimation of M(S)=80 kJ/mol Heat of dissociation of X2(D)=155 kJ/mol Ionization energy of M(I)=347 kJ/mol Electron affinity of X(E)=−343 kJ/mol
Answer» Calculate the lattice energy of a salt $M X_{(s)}$ from the data given below: Heat of formation of $M X (Δ H) = - 550 kJ/mol$ Heat of sublimation of $M (S) = 80 kJ/mol$ Heat of dissociation of $X_{2} (D) = 155 kJ/mol$ Ionization energy of $M (I) = 347 kJ/mol$ Electron affinity of $X (E) = - 343 kJ/mol$

Discussion

22.	Which of the following halogen group when attached to a carbon chain shows minimum −I effect?
Answer» Which of the following halogen group when attached to a carbon chain shows minimum $- I$ effect?

Discussion

23.	Name the gas that can readily decolourise acidified KMnO4 solution:
Answer» Name the gas that can readily decolourise acidified $K M n O_{4}$ solution:

Discussion

24.	Three concentric metal shells A,B and C of respective radii a,b and c (a<b<c) have surface charge densities +σ,−σ and +σ respectively. The potential of shell B is
Answer» Three concentric metal shells $A, B$ and $C$ of respective radii $a, b$ and $c (a < b < c)$ have surface charge densities $+ σ, - σ$ and $+ σ$ respectively. The potential of shell $B$ is

Discussion

25.	0.1 M CH3COOH is titrated with 0.1 M NaOH solution. What would be the difference in pH between 14th and34th stages of neutralization of the acid?
Answer» $0.1 M C H_{3} C O O H$ is titrated with $0.1 M N a O H$ solution. What would be the difference in pH between $\frac{1}{4^{t h}} and \frac{3}{4^{t h}}$ stages of neutralization of the acid?

Discussion

26.	End product of the reaction would be:
Answer» End product of the reaction would be:

Discussion

27.	2 g of acetate ions in the form of sodium acetate are added to 500 mL of a 0.10 Macetic acid solution of pKa(CH3COOH)=4.74. What is the pH of the final solution?
Answer» $2 g$ of acetate ions in the form of sodium acetate are added to $500 mL$ of a $0.10 M$ acetic acid solution of $p K_{a} (C H_{3} C O O H) = 4.74$ . What is the $p H$ of the final solution?

Discussion

28.	If excess of AgNO3 solution is added to 100 mL of 2.4 M solution of dichlorobis(ethylenediamine)cobalt(III) chloride, how many moles of AgCl will be precipitated?
Answer» If excess of $A g N O_{3}$ solution is added to 100 mL of 2.4 M solution of dichlorobis(ethylenediamine)cobalt(III) chloride, how many moles of $A g C l$ will be precipitated?

Discussion

29.	Total number of hydroxyl groups present in a molecule of the major product P is .
Answer» Total number of hydroxyl groups present in a molecule of the major product P is .

Discussion

30.	A homogeneous solid cube of side length L is immersed such that it floats at the liquid-liquid interface with length in the denser liquid as shown. The density of the solid is
Answer» A homogeneous solid cube of side length L is immersed such that it floats at the liquid-liquid interface with length in the denser liquid as shown. The density of the solid is

Discussion

31.	What is the hybridization on carbon (3)?
Answer» What is the hybridization on carbon (3)?

31.

What is the hybridization on carbon (3)?

Answer»

What is the hybridization on carbon (3)?

Discussion

32.	The density of a material is 0.8 gm cm^-3. Express it in kg m^-3.
Answer» The density of a material is 0.8 gm cm^-3. Express it in kg m^-3.

Discussion

33.	Transparent part of human nail is made up of
Answer» Transparent part of human nail is made up of

Discussion

34.	Among the following maximum covalent character is shown by the compound
Answer» Among the following maximum covalent character is shown by the compound

Discussion

35.	Which would undergo SN1 reaction faster in the following pair and why? CH3 \|CH3−CH2−Br and CH3−C−CH3 \| Br
Answer» Which would undergo $S_{N} 1$ reaction faster in the following pair and why? $C H_{3} \| C H_{3} - C H_{2} - B r a n d C H_{3} - C - C H_{3} \| B r$

35.

Which would undergo SN1 reaction faster in the following pair and why? CH3 |CH3−CH2−Br and CH3−C−CH3 | Br

Answer»

Which would undergo $S_{N} 1$ reaction faster in the following pair and why?

$C H_{3} | C H_{3} - C H_{2} - B r a n d C H_{3} - C - C H_{3} | B r$

Discussion

36.	Lithium is strongest reducing agent among alkali metals due to which of the following factor?
Answer» Lithium is strongest reducing agent among alkali metals due to which of the following factor?

Discussion

37.	Which of the following is an amorphous solid ? (a) Graphiter (C) (b) Quartz glass (SiO2) (c) Chrome alum (d) Silicon carbide (SiC)
Answer» Which of the following is an amorphous solid ? (a) Graphiter (C) (b) Quartz glass $(S i O_{2})$ (c) Chrome alum (d) Silicon carbide (SiC)

37.

Which of the following is an amorphous solid ? (a) Graphiter (C) (b) Quartz glass (SiO2) (c) Chrome alum (d) Silicon carbide (SiC)

Answer»

Which of the following is an amorphous solid ?

(a) Graphiter (C) (b) Quartz glass $(S i O_{2})$

(c) Chrome alum (d) Silicon carbide (SiC)

Discussion

38.	Which of the following is not applicable to enantiomers?
Answer» Which of the following is not applicable to enantiomers?

Discussion

39.	For the reaction 2Fe(NO3)3+3Na2CO3→Fe2(CO3)3+6NaNO3, initially 2.5 mol of Fe(NO3)3 and 3.6 mol of Na2CO3 is taken. If 6.3 mol of NaNO3 is obtained then, % yield of given reaction is:
Answer» For the reaction $2 F e (N O_{3})_{3} + 3 N a_{2} C O_{3} \to F e_{2} (C O_{3})_{3} + 6 N a N O_{3}$ , initially 2.5 mol of $F e (N O_{3})_{3}$ and 3.6 mol of $N a_{2} C O_{3}$ is taken. If 6.3 mol of $N a N O_{3}$ is obtained then, % yield of given reaction is:

Discussion

40.	The increasing order of reactivity of the substrates for SN1 reaction is
Answer» The increasing order of reactivity of the substrates for $S_{N} 1$ reaction is

Discussion

41.	The total number(s) of stable conformers with non-zero dipole moment for the following compound is (are)
Answer» The total number(s) of stable conformers with non-zero dipole moment for the following compound is (are)

41.

The total number(s) of stable conformers with non-zero dipole moment for the following compound is (are)

Answer»

The total number(s) of stable conformers with non-zero dipole moment for the following compound is (are)

Discussion

42.	(a) What type of isomerism is shown by the complex [Co(NH3)5(SCN)]2+? (b) Why is [NiCl4]2− paramagnetic while [Ni(CN)4]2− is diamagnetic? (Atomic number of Ni = 28) (c) Why are low spin tetrahedral complexes rarely observed?
Answer» (a) What type of isomerism is shown by the complex $[C o (N H_{3})_{5} (S C N)]^{2 +}$ ? (b) Why is $[N i C l_{4}]^{2 -}$ paramagnetic while $[N i (C N)_{4}]^{2 -}$ is diamagnetic? (Atomic number of Ni = 28) (c) Why are low spin tetrahedral complexes rarely observed?

Discussion

43.	An oxide of a metal contains 40% oxygen by weight. What is the equivalent weight of the metal? Report your answer by dividing it by 2___ .
Answer» An oxide of a metal contains $40 %$ oxygen by weight. What is the equivalent weight of the metal? Report your answer by dividing it by 2___ .

Discussion

44.	Which of the following point defects are shown by AgBr(s) crystals ? 1. Schottky defect 2. Frenkel defect 3. Metal excess defect 4. Metal deficiency defect (a) 1 and 2 (b) 3 and 4 (c) 1 and 3 (d) 2 and 4
Answer» Which of the following point defects are shown by AgBr(s) crystals ? 1. Schottky defect 2. Frenkel defect 3. Metal excess defect 4. Metal deficiency defect (a) 1 and 2 (b) 3 and 4 (c) 1 and 3 (d) 2 and 4

44.

Which of the following point defects are shown by AgBr(s) crystals ? 1. Schottky defect 2. Frenkel defect 3. Metal excess defect 4. Metal deficiency defect (a) 1 and 2 (b) 3 and 4 (c) 1 and 3 (d) 2 and 4

Answer»

Which of the following point defects are shown by AgBr(s) crystals ?

1. Schottky defect

2. Frenkel defect

3. Metal excess defect

4. Metal deficiency defect

(a) 1 and 2 (b) 3 and 4 (c) 1 and 3 (d) 2 and 4

Discussion

45.	Which one of the following is the electron deficient compound?
Answer» Which one of the following is the electron deficient compound?

Discussion

46.	The amount of zinc required to produce 1.12 mL of H2 at STP on treatment with dil.HCl will be: (Given: Molar mass of Zn= 65 g/mol)
Answer» The amount of zinc required to produce $1.12 mL$ of $H_{2}$ at STP on treatment with $d i l . H C l$ will be: (Given: Molar mass of $Z n$ = $65 g / m o l$ )

Discussion

47.	The compound that is most difficult to protonate is:
Answer» The compound that is most difficult to protonate is:

Discussion

48.	An electron is allowed to move freely in a closed cubic box of length of side 10 mm. The uncertainity in its velocity will be:
Answer» An electron is allowed to move freely in a closed cubic box of length of side 10 $m m$ . The uncertainity in its velocity will be:

Discussion

49.	Phenol Zn−−−−−−→distillation A conc.HNO3−−−−−−−→conc.H2SO4 B Zn−−−−→NaOH C In the above reaction, compound (A), (B) and (C) are
Answer» Phenol $Z n - ----- \to d i s t i l l a t i o n$ A $c o n c . H N O_{3} - ------ \to c o n c . H_{2} S O_{4}$ B $Z n - --- \to N a O H$ C In the above reaction, compound (A), (B) and (C) are

Discussion

50.	If solubility product of Zr3(PO4))4 is denoted by Ksp and its molar solubility is denoted by S, then which of the following relation between S and Ksp is correct?
Answer» If solubility product of $Z r_{3} (P O_{4})) 4$ is denoted by $K_{s p}$ and its molar solubility is denoted by S, then which of the following relation between S and $K_{s p}$ is correct?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

In both crystalline NaHCO3 and KHCO3,HCO3- forms only dimeric anion through hydrogen bond.justify this statement.

For CaCO3(s)--CaO(s)+CO2(g) at 977°C ∆H=174KJ/mol ;then ∆E is

26 g of acetylene gas is passed through hot Fe tube. Then the number of molecules of benzene obtained are

What is the correct Bond-line structure of the condensed structure given below ? CH3CONHCH2OCH3

Iron crystallizes as face centred cube. Its density is 2.8 g/cm3. If the volume of the unit cell is 56.38x10-24 cm3, calculate the mass of one atom.

How to relate the stability of carbonates along group and period??

The correct order of boiling points of HF , HCl , HBr and HI is

Find the final temperature of one mole of an ideal gas which has an initial temperature t K. The gas does 9 R joules of work adiabatically. The ratio of specific heats of this gas at constant pressure and at constant volume is 4/3.

Among the following molecules octet rule is not obeyed by:

The correct relationship between wave numbers of spectral lines, in Balmer series of hydrogen atom having the least and highest wave - lengths, is given by

Calculate the momentum of a particle which has a de Broglie wavelength of 4.5×10−10 m. (Planck's constant, h=6.6×10−34 kgm2s−1)

The Oxidation potential of hydrogen electrode at PH=10 and PH2 at 1atm is :

In the compound CH2=CH−CH2−CH2−C≡CH,the C2−C3 bond is of the type

Why couldn't VSEPRT explain the bond strength?

Si3O6−9(having three tetrahedral units) is represented as :

At what temperature will the average speed of CH4 molecules have the same value as O2 has at 300 K

Volume of the air that will be expelled from a vessel of 300 cm3 when it is heated from 27∘C to 37∘C at the same pressure will be

The major product formed in the following reaction CH3CH(Cl)CH2−CH2OHaq.KOH−−−−−→

Solid CO2 is an example of

At 363K, pure water has [H3O+]=10−6M. The value of Kw at this temperature will be

Calculate the lattice energy of a salt MX(s) from the data given below: Heat of formation of MX(ΔH)=−550 kJ/mol Heat of sublimation of M(S)=80 kJ/mol Heat of dissociation of X2(D)=155 kJ/mol Ionization energy of M(I)=347 kJ/mol Electron affinity of X(E)=−343 kJ/mol

Which of the following halogen group when attached to a carbon chain shows minimum −I effect?

Name the gas that can readily decolourise acidified KMnO4 solution:

Three concentric metal shells A,B and C of respective radii a,b and c (a&lt;b&lt;c) have surface charge densities +σ,−σ and +σ respectively. The potential of shell B is

0.1 M CH3COOH is titrated with 0.1 M NaOH solution. What would be the difference in pH between 14th and34th stages of neutralization of the acid?

End product of the reaction would be:

2 g of acetate ions in the form of sodium acetate are added to 500 mL of a 0.10 Macetic acid solution of pKa(CH3COOH)=4.74. What is the pH of the final solution?

If excess of AgNO3 solution is added to 100 mL of 2.4 M solution of dichlorobis(ethylenediamine)cobalt(III) chloride, how many moles of AgCl will be precipitated?

Total number of hydroxyl groups present in a molecule of the major product P is .

A homogeneous solid cube of side length L is immersed such that it floats at the liquid-liquid interface with length in the denser liquid as shown. The density of the solid is

What is the hybridization on carbon (3)?

The density of a material is 0.8 gm cm^-3. Express it in kg m^-3.

Transparent part of human nail is made up of

Among the following maximum covalent character is shown by the compound

Which would undergo SN1 reaction faster in the following pair and why? CH3 |CH3−CH2−Br and CH3−C−CH3 | Br

Lithium is strongest reducing agent among alkali metals due to which of the following factor?

Which of the following is an amorphous solid ? (a) Graphiter (C) (b) Quartz glass (SiO2) (c) Chrome alum (d) Silicon carbide (SiC)

Which of the following is not applicable to enantiomers?

For the reaction 2Fe(NO3)3+3Na2CO3→Fe2(CO3)3+6NaNO3, initially 2.5 mol of Fe(NO3)3 and 3.6 mol of Na2CO3 is taken. If 6.3 mol of NaNO3 is obtained then, % yield of given reaction is:

The increasing order of reactivity of the substrates for SN1 reaction is

The total number(s) of stable conformers with non-zero dipole moment for the following compound is (are)

(a) What type of isomerism is shown by the complex [Co(NH3)5(SCN)]2+? (b) Why is [NiCl4]2− paramagnetic while [Ni(CN)4]2− is diamagnetic? (Atomic number of Ni = 28) (c) Why are low spin tetrahedral complexes rarely observed?

An oxide of a metal contains 40% oxygen by weight. What is the equivalent weight of the metal? Report your answer by dividing it by 2___ .

Which of the following point defects are shown by AgBr(s) crystals ? 1. Schottky defect 2. Frenkel defect 3. Metal excess defect 4. Metal deficiency defect (a) 1 and 2 (b) 3 and 4 (c) 1 and 3 (d) 2 and 4

Which one of the following is the electron deficient compound?

The amount of zinc required to produce 1.12 mL of H2 at STP on treatment with dil.HCl will be: (Given: Molar mass of Zn= 65 g/mol)

The compound that is most difficult to protonate is:

An electron is allowed to move freely in a closed cubic box of length of side 10 mm. The uncertainity in its velocity will be:

Phenol Zn−−−−−−→distillation A conc.HNO3−−−−−−−→conc.H2SO4 B Zn−−−−→NaOH C In the above reaction, compound (A), (B) and (C) are

If solubility product of Zr3(PO4))4 is denoted by Ksp and its molar solubility is denoted by S, then which of the following relation between S and Ksp is correct?

Three concentric metal shells A,B and C of respective radii a,b and c (a<b<c) have surface charge densities +σ,−σ and +σ respectively. The potential of shell B is