46295 + Interview Questions in Chemistry

1.	Using MOT, predict which of the following species has the shortest bond length ?
Answer» Using MOT, predict which of the following species has the shortest bond length ?

Discussion

2.	Distinguish between the meaning of adsorption and absorption. Give one example in each case ?
Answer» Distinguish between the meaning of adsorption and absorption. Give one example in each case ?

Discussion

3.	Which one of the following reaction is an example of calcination process?
Answer» Which one of the following reaction is an example of calcination process?

Discussion

4.	Arrange the following in order of increasing thermal stability: BeSO4,MgSO4,CaSO4
Answer» Arrange the following in order of increasing thermal stability: $B e S O_{4}, M g S O_{4}, C a S O_{4}$

Discussion

5.	Rank the following compounds in order of decreasing acidic strength :
Answer» Rank the following compounds in order of decreasing acidic strength :

Discussion

6.	Which is true about conformers of 1,1,2,2-tetrachloroethane?
Answer» Which is true about conformers of 1,1,2,2-tetrachloroethane?

Discussion

7.	Back bonding is possible in which of the following compounds?
Answer» Back bonding is possible in which of the following compounds?

Discussion

8.	A carbon compound contains 12.8% carbon, 1% hydrogen, 85.1% bromine by mass. The molecular weight of the compound is 187.9. Calculate its molecular formula.
Answer» A carbon compound contains 12.8% carbon, 1% hydrogen, 85.1% bromine by mass. The molecular weight of the compound is 187.9. Calculate its molecular formula.

Discussion

9.	Oxidation no. Of CuH
Answer» Oxidation no. Of CuH

Discussion

10.	A copper block of mass 2.5 kg is heated in a furnace to a temperature of 500°C and then placed on a large ice block.Specific heat of copper =0.39Jg^-1K^-1,heat of fusion of water =335Jg^-1 Maximum amount of ice that can be melted A)1 kg. B)1.5 kg. C) 2 kg. D)2.5 kg
Answer» A copper block of mass 2.5 kg is heated in a furnace to a temperature of 500°C and then placed on a large ice block.Specific heat of copper =0.39Jg^-1K^-1,heat of fusion of water =335Jg^-1 Maximum amount of ice that can be melted A)1 kg. B)1.5 kg. C) 2 kg. D)2.5 kg

10.

A copper block of mass 2.5 kg is heated in a furnace to a temperature of 500°C and then placed on a large ice block.Specific heat of copper =0.39Jg^-1K^-1,heat of fusion of water =335Jg^-1 Maximum amount of ice that can be melted A)1 kg. B)1.5 kg. C) 2 kg. D)2.5 kg

Answer»

A copper block of mass 2.5 kg is heated in a furnace to a temperature of 500°C and then placed on a large ice block.Specific heat of copper =0.39Jg^-1K^-1,heat of fusion of water =335Jg^-1 Maximum amount of ice that can be melted

A)1 kg. B)1.5 kg. C) 2 kg. D)2.5 kg

Discussion

11.	For the reaction: 2HI (g)⇌H2 (g)+I2 (g) The degree of dissociation (A) of HI (g) is related to equilibrium constant, Kp by the expression
Answer» For the reaction: $2 H I (g) ⇌ H_{2} (g) + I_{2} (g)$ The degree of dissociation (A) of $H I$ (g) is related to equilibrium constant, $K_{p}$ by the expression

Discussion

12.	Calcium carbonate reacts with aqueous HCl to give CaCl2 and CO2 according to the reaction, CaCO3 + 2HCl --> CaCl2 + H2O What mass of CaCO3 is required to react completely with 25mL of 0.75 HCl?
Answer» Calcium carbonate reacts with aqueous HCl to give CaCl₂and CO₂according to the reaction, CaCO₃+ 2HCl --> CaCl₂+ H₂O What mass of CaCO3 is required to react completely with 25mL of 0.75 HCl?

12.

Calcium carbonate reacts with aqueous HCl to give CaCl2 and CO2 according to the reaction, CaCO3 + 2HCl --> CaCl2 + H2O What mass of CaCO3 is required to react completely with 25mL of 0.75 HCl?

Answer»

Calcium carbonate reacts with aqueous HCl to give CaCl₂and CO₂according to the reaction, CaCO₃+ 2HCl --> CaCl₂+ H₂O

What mass of CaCO3 is required to react completely with 25mL of 0.75 HCl?

Discussion

13.	Predict the order of reactivity of the following compounds in SN1 and SN2 reactions C6H5CH2Br , C6H5CH(C6H5)Br , C6H5CH(CH3)Br , C6H5C(CH3)(C6H5)
Answer» Predict the order of reactivity of the following compounds in SN1 and SN2 reactions C6H5CH2Br , C6H5CH(C6H5)Br , C6H5CH(CH3)Br , C6H5C(CH3)(C6H5)

13.

Predict the order of reactivity of the following compounds in SN1 and SN2 reactions C6H5CH2Br , C6H5CH(C6H5)Br , C6H5CH(CH3)Br , C6H5C(CH3)(C6H5)

Answer»

Predict the order of reactivity of the following compounds in SN1 and SN2 reactions

C6H5CH2Br , C6H5CH(C6H5)Br , C6H5CH(CH3)Br , C6H5C(CH3)(C6H5)

Discussion

14.	The constituent particles (atoms/molecules/ions) forming three dimensional structure of solids are assumed to be
Answer» The constituent particles (atoms/molecules/ions) forming three dimensional structure of solids are assumed to be

Discussion

15.	The correct increasing order of stability of the following free radicals is
Answer» The correct increasing order of stability of the following free radicals is

Discussion

16.	During curdling of milk, what happens to sugar present in it?
Answer» During curdling of milk, what happens to sugar present in it?

Discussion

17.	Without consulting the periodic table, select from each of the following sets, the elements belonging to the same group of the periodic table
Answer» Without consulting the periodic table, select from each of the following sets, the elements belonging to the same group of the periodic table

Discussion

18.	The oxidation number of Pt in the complex [Pt(C2H4)Cl3]- is:
Answer» The oxidation number of Pt in the complex [Pt(C₂H₄)Cl₃]^-is:

Discussion

19.	If 0.4M Al2(SO4)3 solution at 300 K is found to isotonic with 0.5 M NaCl (100% dissociation) solution, calculate degree of dissociation of Al2(SO4)3.
Answer» If 0.4M $A l_{2} (S O_{4})_{3}$ solution at 300 K is found to isotonic with 0.5 M NaCl ( $100 %$ dissociation) solution, calculate degree of dissociation of $A l_{2} (S O_{4})_{3}$ .

Discussion

20.	What is aggregation of colloidal particles into insoluble precipitate by addition of some suitable electrolyte called?
Answer» What is aggregation of colloidal particles into insoluble precipitate by addition of some suitable electrolyte called?

Discussion

21.	Scientists found that cotton when treated with azo dyes exhibited a phenonemon. It seemed to keep the dye on the surface as well as in the bulk. This phenomenon is called ___
Answer» Scientists found that cotton when treated with azo dyes exhibited a phenonemon. It seemed to keep the dye on the surface as well as in the bulk. This phenomenon is called ___

Discussion

22.	Which of the following reactions give(s) a 1o amine as the major product?
Answer» Which of the following reactions give(s) a $1^{o}$ amine as the major product?

Discussion

23.	In the following reaction sequence, Y is : PhOCOCH3AlCl3−−−→Δ(X)l2−−−−→NaOH(Y)
Answer» In the following reaction sequence, Y is : $P h O C O C H_{3} A l C l_{3} - -- \to Δ (X) l_{2} - --- \to N a O H (Y)$

Discussion

24.	Bromine monochloride, BrCl decomposes into bromine and chlorine and reaches the equilibrium: 2BrCl↔Br2(g)+Cl2(g) Fro which Kc=32 at 500 K. If initially pur BrCl is present at a concentration of 3.3×10−3mol−1, what is its molar concentration in the mixture at equilibrium?
Answer» Bromine monochloride, BrCl decomposes into bromine and chlorine and reaches the equilibrium: $2 B r C l \leftrightarrow B r_{2} (g) + C l_{2} (g)$ Fro which $K_{c} = 32$ at 500 K. If initially pur BrCl is present at a concentration of $3.3 \times 10^{- 3} m o l^{- 1}$ , what is its molar concentration in the mixture at equilibrium?

Discussion

25.	Explain the term target molecules or drug targets used in medicinal chemistry.
Answer» Explain the term target molecules or drug targets used in medicinal chemistry.

Discussion

26.	Which of the following graphs does support the validity of Langmuir’s adsorption isotherm for a gas-solid system.
Answer» Which of the following graphs does support the validity of Langmuir’s adsorption isotherm for a gas-solid system.

Discussion

27.	Oxalosuccinic acid, an intermediary compound of Krebs cycle is a
Answer» Oxalosuccinic acid, an intermediary compound of Krebs cycle is a

Discussion

28.	In the presence of AlCl3/HCl n-butane isomerizes to:
Answer» In the presence of $A l C l_{3}$ /HCl n-butane isomerizes to:

Discussion

29.	Which of the following compound possesses the “C – H” bond with the lowest bond dissociation energy?
Answer» Which of the following compound possesses the “C – H” bond with the lowest bond dissociation energy?

Discussion

30.	In terms of thermodynamic Enthalpy, the synthesis of ozone from dioxygen is an __ process.
Answer» In terms of thermodynamic Enthalpy, the synthesis of ozone from dioxygen is an __ process.

Discussion

31.	Glycerol boils at 290oC with slight decomposition. Impure glycerine can be purified by[CPMT 1983, 94]
Answer» Glycerol boils at 290^oC with slight decomposition. Impure glycerine can be purified by[CPMT 1983, 94]

Discussion

32.	Blood plasma has the following composition (milliequivalents per litre). Calculate its osmotic pressure at 37∘C. Na+=138,Ca2+=5.2,K+=4.5, Mg2+=2.0,Cl−=105,HCO−3=25, PO3−4=2.2,SO2−4=0.5, Proteins = 16, others = 1.0
Answer» Blood plasma has the following composition (milliequivalents per litre). Calculate its osmotic pressure at $37^{\circ} C$ . $N a^{+} = 138, C a^{2 +} = 5.2, K^{+} = 4.5,$ $M g^{2 +} = 2.0, C l^{-} = 105, H C O_{3}^{-} = 25,$ $P O_{4}^{3 -} = 2.2, S O_{4}^{2 -} = 0.5,$ Proteins = 16, others = 1.0

Discussion

33.	Which of the following is correct[DPMT 1997]
Answer» Which of the following is correct [DPMT 1997]

33.

Which of the following is correct[DPMT 1997]

Answer»

Which of the following is correct

[DPMT 1997]

Discussion

34.	The soldiers of Napolean army while at Alps during freezing winter suffered a serious problem as regards to the tin buttons of their uniform. White metallic tin buttons got converted to grey powder. This transformation is related to:
Answer» The soldiers of Napolean army while at Alps during freezing winter suffered a serious problem as regards to the tin buttons of their uniform. White metallic tin buttons got converted to grey powder. This transformation is related to:

Discussion

35.	The compound that does not liberate CO2, on treatment with aqueous sodium bicarbonate solution, is
Answer» The compound that does not liberate $C O_{2}$ , on treatment with aqueous sodium bicarbonate solution, is

Discussion

36.	Among the i) alkanes ii) akyl halide iii) ether iv) alcohol v) carboxylic acid having the same molecular weight, the one with highest boiling point and reason are
Answer» Among the i) alkanes ii) akyl halide iii) ether iv) alcohol v) carboxylic acid having the same molecular weight, the one with highest boiling point and reason are

Discussion

37.	Primary, secondary and tertiary alcohols are distinguished by
Answer» Primary, secondary and tertiary alcohols are distinguished by

Discussion

38.	Number of H atoms in 34 kg NH3 gas are:
Answer» Number of H atoms in $34 k g N H_{3}$ gas are:

Discussion

39.	CsCl has cubic structure. Suppose its density is 4.37 g/cm3. What is the distance between Cs+ and Cl− ions? (Atomic mass of Cs is 133). pm
Answer» CsCl has cubic structure. Suppose its density is $4.37 g / c m^{3}$ . What is the distance between $C s^{+}$ and $C l^{-}$ ions? (Atomic mass of $C s$ is 133). $p m$

Discussion

40.	The atomic spectrum of Li2+ ion arises due to the transition of an electron from n2 to n1. If n2+n1=4 and n2−n1=2. The wavenumber of 3rd line of this series in Li2+ ion is found to be x×135 cm−1. Find the value of x. (Rydberg Constant(RH)≈109600 cm−1)
Answer» The atomic spectrum of $L i^{2 +}$ ion arises due to the transition of an electron from $n_{2}$ to $n_{1}$ . If $n_{2} + n_{1} = 4$ and $n_{2} - n_{1} = 2$ . The wavenumber of $3^{r d}$ line of this series in $L i^{2 +}$ ion is found to be $x \times 135 c m^{- 1}$ . Find the value of x. $(R y d b e r g C o n s t a n t (R_{H}) \approx 109600 c m^{- 1})$

Discussion

41.	Two weak bases AOH and BOH having equal concentrations of 0.5 M are present in a solution. Calculate the ratio, [A+][B+] at equilibrium. Dissociation constants for AOH and BOH are 1.1×10−8 and 1.7×10−9 respectively.(Report the answer upto second decimal)
Answer» Two weak bases $A O H$ and $B O H$ having equal concentrations of $0.5 M$ are present in a solution. Calculate the ratio, $\frac{[A^{+}]}{[B^{+}]}$ at equilibrium. Dissociation constants for $A O H$ and $B O H$ are $1.1 \times 10^{- 8}$ and $1.7 \times 10^{- 9}$ respectively.(Report the answer upto second decimal)

Discussion

42.	The author implies that attempts to treat human relations scientifically have thus far been relatively-
Answer» The author implies that attempts to treat human relations scientifically have thus far been relatively-

Discussion

43.	What volume of H2SO4 (density of of 1.85 g cm−3 ) and what mass of wate must be taken to prepare 100 cm3 of 15% soln of sulphuric acid (den-1.10 g cm−3)?
Answer» What volume of $H_{2} S O_{4}$ (density of of 1.85 g $c m^{- 3}$ ) and what mass of wate must be taken to prepare $100 c m^{3}$ of 15% soln of sulphuric acid (den-1.10 g $c m^{- 3})$ ?

Discussion

44.	How many of the following compounds are planar, as well as non polar compound:C3O2,CH2=C=CH2,BF3,CCl4,SF6,XeF4,IF−4,IF7,SF4,ClF3
Answer» How many of the following compounds are planar, as well as non polar compound: $C_{3} O_{2}, C H_{2} = C = C H_{2}, B F_{3}, C C l_{4}, S F_{6}, X e F_{4}, I F_{4}^{-}, I F_{7}, S F_{4}, C l F_{3}$

Discussion

45.	Why bubbles attain a spherical shape?
Answer» Why bubbles attain a spherical shape?

Discussion

46.	An aqueous solution freezes at −2.55∘ C. What is its boiling point? (Kb H2O=0.52K/m; Kf H2O=1.86K/m)
Answer» An aqueous solution freezes at $- {2.55}^{\circ} C$ . What is its boiling point? $(K_{b} H_{2} O = 0.52 K / m; K_{f} H_{2} O = 1.86 K / m)$

46.

An aqueous solution freezes at −2.55∘ C. What is its boiling point? (Kb H2O=0.52K/m; Kf H2O=1.86K/m)

Answer»

An aqueous solution freezes at $- {2.55}^{\circ} C$ . What is its boiling point?

$(K_{b} H_{2} O = 0.52 K / m; K_{f} H_{2} O = 1.86 K / m)$

Discussion

47.	In a normal spinel types structure, the oxide ions are arranged in ccp whereas 1/8 tetrahedral holes are occupied by Zn2+ ions and 50% of octahedral holes are occupied by Fe3+ ions. The formula of the compound is –
Answer» In a normal spinel types structure, the oxide ions are arranged in ccp whereas 1/8 tetrahedral holes are occupied by $Z n^{2 +}$ ions and 50% of octahedral holes are occupied by $F e^{3 +}$ ions. The formula of the compound is –

Discussion

48.	Assertion (A) Boiling points of alcohols and ethers are high. Reason (R) They can form intermolecular hydrogen-bonding. (a) Assertion and reason both are correct and reason is correct explanation of assertion. (b) Assertion and reason both are wrong statements. (c) Assertion is correct statement but reason is wrong statement. (d) Assertion is wrong statement but reason is correct statement. (e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.
Answer» Assertion (A) Boiling points of alcohols and ethers are high. Reason (R) They can form intermolecular hydrogen-bonding. (a) Assertion and reason both are correct and reason is correct explanation of assertion. (b) Assertion and reason both are wrong statements. (c) Assertion is correct statement but reason is wrong statement. (d) Assertion is wrong statement but reason is correct statement. (e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

Discussion

49.	An unsaturated hydrocarbon absorbs two hydrogen molecules on catalytic hydrogenation, and also gives following reactionX→O3,Zn/H2OA→[Ag(NH3)]+(3-oxohexanedicarboxylicacid)X will be:
Answer» An unsaturated hydrocarbon absorbs two hydrogen molecules on catalytic hydrogenation, and also gives following reaction $X \overset{O_{3}, Zn / H_{2} O}{\to} A \overset{{[Ag ({NH}_{3})]}^{+}}{\to} (3 - oxohexanedicarboxylic acid)$ X will be:

49.

An unsaturated hydrocarbon absorbs two hydrogen molecules on catalytic hydrogenation, and also gives following reactionX→O3,Zn/H2OA→[Ag(NH3)]+(3-oxohexanedicarboxylicacid)X will be:

Answer»

An unsaturated hydrocarbon absorbs two hydrogen molecules on catalytic hydrogenation, and also gives following reaction

$X \overset{O_{3}, Zn / H_{2} O}{\to} A \overset{{[Ag ({NH}_{3})]}^{+}}{\to} (3 - oxohexanedicarboxylic acid)$

X will be:

Discussion

50.	Which of the following reagents reacts differently with HCHO,CH3CHO and CH3COCH3 ?
Answer» Which of the following reagents reacts differently with $H C H O, C H_{3} C H O and C H_{3} C O C H_{3}$ ?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Using MOT, predict which of the following species has the shortest bond length ?

Distinguish between the meaning of adsorption and absorption. Give one example in each case ?

Which one of the following reaction is an example of calcination process?

Arrange the following in order of increasing thermal stability: BeSO4,MgSO4,CaSO4

Rank the following compounds in order of decreasing acidic strength :

Which is true about conformers of 1,1,2,2-tetrachloroethane?

Back bonding is possible in which of the following compounds?

A carbon compound contains 12.8% carbon, 1% hydrogen, 85.1% bromine by mass. The molecular weight of the compound is 187.9. Calculate its molecular formula.

Oxidation no. Of CuH

A copper block of mass 2.5 kg is heated in a furnace to a temperature of 500°C and then placed on a large ice block.Specific heat of copper =0.39Jg^-1K^-1,heat of fusion of water =335Jg^-1 Maximum amount of ice that can be melted A)1 kg. B)1.5 kg. C) 2 kg. D)2.5 kg

For the reaction: 2HI (g)⇌H2 (g)+I2 (g) The degree of dissociation (A) of HI (g) is related to equilibrium constant, Kp by the expression

Calcium carbonate reacts with aqueous HCl to give CaCl​​​2 and CO​​​​​2 according to the reaction, CaCO​​​3 + 2HCl --&gt; CaCl​​​2 + H​​​​​2​​​​​O What mass of CaCO3 is required to react completely with 25mL of 0.75 HCl?

Predict the order of reactivity of the following compounds in SN1 and SN2 reactions C6H5CH2Br , C6H5CH(C6H5)Br , C6H5CH(CH3)Br , C6H5C(CH3)(C6H5)

The constituent particles (atoms/molecules/ions) forming three dimensional structure of solids are assumed to be

The correct increasing order of stability of the following free radicals is

During curdling of milk, what happens to sugar present in it?

Without consulting the periodic table, select from each of the following sets, the elements belonging to the same group of the periodic table

The oxidation number of Pt in the complex [Pt(C2H4)Cl3]- is:

If 0.4M Al2(SO4)3 solution at 300 K is found to isotonic with 0.5 M NaCl (100% dissociation) solution, calculate degree of dissociation of Al2(SO4)3.

What is aggregation of colloidal particles into insoluble precipitate by addition of some suitable electrolyte called?

Scientists found that cotton when treated with azo dyes exhibited a phenonemon. It seemed to keep the dye on the surface as well as in the bulk. This phenomenon is called ___

Which of the following reactions give(s) a 1o amine as the major product?

In the following reaction sequence, Y is : PhOCOCH3AlCl3−−−→Δ(X)l2−−−−→NaOH(Y)

Bromine monochloride, BrCl decomposes into bromine and chlorine and reaches the equilibrium: 2BrCl↔Br2(g)+Cl2(g) Fro which Kc=32 at 500 K. If initially pur BrCl is present at a concentration of 3.3×10−3mol−1, what is its molar concentration in the mixture at equilibrium?

Explain the term target molecules or drug targets used in medicinal chemistry.

Which of the following graphs does support the validity of Langmuir’s adsorption isotherm for a gas-solid system.

Oxalosuccinic acid, an intermediary compound of Krebs cycle is a

In the presence of AlCl3/HCl n-butane isomerizes to:

Which of the following compound possesses the “C – H” bond with the lowest bond dissociation energy?

In terms of thermodynamic Enthalpy, the synthesis of ozone from dioxygen is an __ process.

Glycerol boils at 290oC with slight decomposition. Impure glycerine can be purified by[CPMT 1983, 94]

Blood plasma has the following composition (milliequivalents per litre). Calculate its osmotic pressure at 37∘C. Na+=138,Ca2+=5.2,K+=4.5, Mg2+=2.0,Cl−=105,HCO−3=25, PO3−4=2.2,SO2−4=0.5, Proteins = 16, others = 1.0

Which of the following is correct[DPMT 1997]

The soldiers of Napolean army while at Alps during freezing winter suffered a serious problem as regards to the tin buttons of their uniform. White metallic tin buttons got converted to grey powder. This transformation is related to:

The compound that does not liberate CO2, on treatment with aqueous sodium bicarbonate solution, is

Among the i) alkanes ii) akyl halide iii) ether iv) alcohol v) carboxylic acid having the same molecular weight, the one with highest boiling point and reason are

Primary, secondary and tertiary alcohols are distinguished by

Number of H atoms in 34 kg NH3 gas are:

CsCl has cubic structure. Suppose its density is 4.37 g/cm3. What is the distance between Cs+ and Cl− ions? (Atomic mass of Cs is 133). pm

The atomic spectrum of Li2+ ion arises due to the transition of an electron from n2 to n1. If n2+n1=4 and n2−n1=2. The wavenumber of 3rd line of this series in Li2+ ion is found to be x×135 cm−1. Find the value of x. (Rydberg Constant(RH)≈109600 cm−1)

Two weak bases AOH and BOH having equal concentrations of 0.5 M are present in a solution. Calculate the ratio, [A+][B+] at equilibrium. Dissociation constants for AOH and BOH are 1.1×10−8 and 1.7×10−9 respectively.(Report the answer upto second decimal)

The author implies that attempts to treat human relations scientifically have thus far been relatively-

What volume of H2SO4 (density of of 1.85 g cm−3 ) and what mass of wate must be taken to prepare 100 cm3 of 15% soln of sulphuric acid (den-1.10 g cm−3)?

How many of the following compounds are planar, as well as non polar compound:C3O2,CH2=C=CH2,BF3,CCl4,SF6,XeF4,IF−4,IF7,SF4,ClF3

Why bubbles attain a spherical shape?

An aqueous solution freezes at −2.55∘ C. What is its boiling point? (Kb H2O=0.52K/m; Kf H2O=1.86K/m)

In a normal spinel types structure, the oxide ions are arranged in ccp whereas 1/8 tetrahedral holes are occupied by Zn2+ ions and 50% of octahedral holes are occupied by Fe3+ ions. The formula of the compound is –

An unsaturated hydrocarbon absorbs two hydrogen molecules on catalytic hydrogenation, and also gives following reactionX→O3,Zn/H2OA→[Ag(NH3)]+(3-oxohexanedicarboxylicacid)X will be:

Which of the following reagents reacts differently with HCHO,CH3CHO and CH3COCH3 ?

Calcium carbonate reacts with aqueous HCl to give CaCl2 and CO2 according to the reaction, CaCO3 + 2HCl --> CaCl2 + H2O What mass of CaCO3 is required to react completely with 25mL of 0.75 HCl?