46295 + Interview Questions in Chemistry

1.	Calculate the change in entropy of 1 mole of ideal gass, when temperature is lower down to 1/8 of initial temperature at constant volume is ?
Answer» Calculate the change in entropy of 1 mole of ideal gass, when temperature is lower down to 1/8 of initial temperature at constant volume is ?

Discussion

2.	74. Calculate the number of formula units of a crystal AB having CsCl type structure in 240gm. The unit cell edge length of AB is 200pm and density of the crystal is 6g/ cc ??
Answer» 74. Calculate the number of formula units of a crystal AB having CsCl type structure in 240gm. The unit cell edge length of AB is 200pm and density of the crystal is 6g/ cc ??

Discussion

3.	Name the method that is used for refining of nickel.
Answer» Name the method that is used for refining of nickel.

Discussion

4.	why is HCOOH more acidic than benzoic acid?
Answer» why is HCOOH more acidic than benzoic acid?

Discussion

5.	The molar mass (g/mol) of final product C in above reaction is
Answer» The molar mass (g/mol) of final product C in above reaction is

Discussion

6.	Atomic number is considered to be a more appropriate parameter than atomic mass for the classification of elements in a periodic table. Why?How does atomic size of elements vary on moving from:(i) left to right in a period?(ii) top to bottom in a group?Give reasons for your answers.
Answer» Atomic number is considered to be a more appropriate parameter than atomic mass for the classification of elements in a periodic table. Why? How does atomic size of elements vary on moving from: (i) left to right in a period? (ii) top to bottom in a group? Give reasons for your answers.

Discussion

7.	Which is an unsaturated hydrocarbon?
Answer» Which is an unsaturated hydrocarbon?

Discussion

8.	Mole of thiosulphate ions required to react completely with one mole of permanganate ion in faintly alkaline medium is 1.2/5 2.2/3 3.3/8 4.3/
Answer» Mole of thiosulphate ions required to react completely with one mole of permanganate ion in faintly alkaline medium is 1.2/5 2.2/3 3.3/8 4.3/

Discussion

9.	how to find degree of association ?
Answer» how to find degree of association ?

Discussion

10.	From the following data, mark the option(s) where ΔH is correctly written for the given reaction. Given : H+(aq) + OH−(aq) → H2O(ℓ); ΔH = −57.3kJ ΔHsolution of HA(g) = −70.7 kJ/mol ΔHsolution of BOH(g) = +20 kJ/mol ΔHionization of HA = 15 kJ/mol and BOH is a strong base. ReactionΔHr (kJ/mol)(a)HA(aq)+BOH(aq)→ BA(aq)+H2O−42.3(b)HA(g)+BOH(g)→BA(aq)+H2O −93(c)HA(g)→H+(aq)+A−(aq) −55.7(d)B+(aq)+OH−(aq)→BOH(aq) −20
Answer» From the following data, mark the option(s) where $Δ$ H is correctly written for the given reaction. Given : $H^{+} (a q) + O H^{-} (a q) \to H_{2} O (ℓ); Δ H = - 57.3 k J$ $Δ H_{solution} of HA(g) = - 70.7 kJ/mol$ $Δ H_{solution} of BOH(g) = + 20 kJ/mol$ $Δ H_{ionization} of H A = 15 kJ/mol$ and BOH is a strong base. $\begin{matrix} Reaction & Δ H_{r} (kJ/mol) (a) & HA(aq) + BOH(aq) \to BA(aq) + H_{2} O & - 42.3 (b) & HA(g) + BOH(g) \to BA(aq) + H_{2} O & - 93 (c) & HA(g) \to H^{+} (a q) + A^{-} (a q) & - 55.7 (d) & B^{+} (aq) + O H^{-} (aq) \to BOH(aq) & - 20 \end{matrix}$

10.

From the following data, mark the option(s) where ΔH is correctly written for the given reaction. Given : H+(aq) + OH−(aq) → H2O(ℓ); ΔH = −57.3kJ ΔHsolution of HA(g) = −70.7 kJ/mol ΔHsolution of BOH(g) = +20 kJ/mol ΔHionization of HA = 15 kJ/mol and BOH is a strong base. ReactionΔHr (kJ/mol)(a)HA(aq)+BOH(aq)→ BA(aq)+H2O−42.3(b)HA(g)+BOH(g)→BA(aq)+H2O −93(c)HA(g)→H+(aq)+A−(aq) −55.7(d)B+(aq)+OH−(aq)→BOH(aq) −20

Answer»

From the following data, mark the option(s) where $Δ$ H is correctly written for the given reaction.

Given : $H^{+} (a q) + O H^{-} (a q) \to H_{2} O (ℓ); Δ H = - 57.3 k J$

$Δ H_{solution} of HA(g) = - 70.7 kJ/mol$

$Δ H_{solution} of BOH(g) = + 20 kJ/mol$

$Δ H_{ionization} of H A = 15 kJ/mol$ and BOH is a strong base.

$\begin{matrix} Reaction & Δ H_{r} (kJ/mol) (a) & HA(aq) + BOH(aq) \to BA(aq) + H_{2} O & - 42.3 (b) & HA(g) + BOH(g) \to BA(aq) + H_{2} O & - 93 (c) & HA(g) \to H^{+} (a q) + A^{-} (a q) & - 55.7 (d) & B^{+} (aq) + O H^{-} (aq) \to BOH(aq) & - 20 \end{matrix}$

Discussion

11.	Which of the following statement is not true for halogens ? 1) All form monobasic oxyacids. 2) All are oxidizing agents. 3) All but fluorine show positive oxidation states. 4) Chlorine has the highest electron gain enthalpy.
Answer» Which of the following statement is not true for halogens ? 1) All form monobasic oxyacids. 2) All are oxidizing agents. 3) All but fluorine show positive oxidation states. 4) Chlorine has the highest electron gain enthalpy.

Discussion

12.	Why 3 degree compound do not show acylation and shows alkylation
Answer» Why 3 degree compound do not show acylation and shows alkylation

Discussion

13.	How many of the following compound(s) cannot be prepared:1.XeF22.XeF33.XeF54.XeF6
Answer» How many of the following compound(s) cannot be prepared: 1. $X e F_{2}$ 2. $X e F_{3}$ 3. $X e F_{5}$ 4. $X e F_{6}$

Discussion

14.	Multiplication of electron velocity and radius for a orbit in an atom is 1) proptional to mass of electron 2) proptional to square of mass of electron 3) inversely proptional to mass of electron 4) does not depend upon mass of electron
Answer» Multiplication of electron velocity and radius for a orbit in an atom is 1) proptional to mass of electron 2) proptional to square of mass of electron 3) inversely proptional to mass of electron 4) does not depend upon mass of electron

Discussion

15.	The following ether, when treated with HI produces:
Answer» The following ether, when treated with $H I$ produces:

Discussion

16.	The number of water molecules present in 2 litres of water is:
Answer» The number of water molecules present in 2 litres of water is:

Discussion

17.	What is the number of atoms in a unit cell of a face-centred cubic crystal?
Answer» What is the number of atoms in a unit cell of a face-centred cubic crystal?

Discussion

18.	Why is use of aspartame limited to cold foods and drinks?
Answer» Why is use of aspartame limited to cold foods and drinks?

Discussion

19.	What is the name of the covering membrane of gemule
Answer» What is the name of the covering membrane of gemule

Discussion

20.	The major components of polyester are
Answer» The major components of polyester are

Discussion

21.	Lithium nitrate is heated to give:
Answer» Lithium nitrate is heated to give:

Discussion

22.	A unit cell consists of a cube in which there are anions Y at each corner and cations X at the centre of alternate faces of the unit cell. What is the simplest formula of the compound?
Answer» A unit cell consists of a cube in which there are anions Y at each corner and cations X at the centre of alternate faces of the unit cell. What is the simplest formula of the compound?

Discussion

23.	The major product H given in the reaction sequence is:
Answer» The major product H given in the reaction sequence is:

Discussion

24.	A reaction involving different reactants can never be:
Answer» A reaction involving different reactants can never be:

Discussion

25.	Cotton is a natural polymer. What is its chemical name?
Answer» Cotton is a natural polymer. What is its chemical name?

Discussion

26.	72 Arrange in decreasing order of R reactivity towards aromatic Electrophilic substitution reaction:- 1) C6H5OCH3 2) C6H5OCH2H3 3) C6H5NHCOCH2CH3 4) C6H5NHCOCH3 The drawn structures of the given compounds is attached.
Answer» 72 Arrange in decreasing order of R reactivity towards aromatic Electrophilic substitution reaction:- 1) C6H5OCH3 2) C6H5OCH2H3 3) C6H5NHCOCH2CH3 4) C6H5NHCOCH3 The drawn structures of the given compounds is attached.

Discussion

27.	Why glucose and alcohol donot dissociate in water to produce h+ ions?
Answer» Why glucose and alcohol donot dissociate in water to produce h+ ions?

Discussion

28.	Which type electronic configuration is 1s(to the power 2) 2 s (to the power 2 ) 2 p ( to the power 2)? Kindly explain it.
Answer» Which type electronic configuration is 1s(to the power 2) 2 s (to the power 2 ) 2 p ( to the power 2)? Kindly explain it.

Discussion

29.	A compound C9H7O2Cl exists predominantly in enol form (A) and also in Keto form (B). On oxidation with KMnO4 it gives m-chlorobenzoic acid as one of the products.Identify the compound (A) and (B).
Answer» A compound C9H7O2Cl exists predominantly in enol form (A) and also in Keto form (B). On oxidation with KMnO4 it gives m-chlorobenzoic acid as one of the products.Identify the compound (A) and (B).

Discussion

30.	Magnesium wire burns in the atmosphere of CO2 because
Answer» Magnesium wire burns in the atmosphere of $C O_{2}$ because

Discussion

31.	If concentration of reactant is increased by m moles, then k (rate constant) becomes:
Answer» If concentration of reactant is increased by m moles, then k (rate constant) becomes:

Discussion

32.	What is +H effect, is there -H effect also ?What are these?in methyl carboxylic acid" the hyperconjugation and +I effect both operate in para isomer while in metal isomerit is only +I effect."Why so?
Answer» What is +H effect, is there -H effect also ?What are these? in methyl carboxylic acid" the hyperconjugation and +I effect both operate in para isomer while in metal isomer it is only +I effect." Why so?

Discussion

33.	Calculate the entropy change when 2 mol of an ideal gas expands isothermally and reversibly from an initial volume of 10 dm3 to 100 dm3 at 300 K.
Answer» Calculate the entropy change when 2 mol of an ideal gas expands isothermally and reversibly from an initial volume of 10 $d m^{3}$ to 100 $d m^{3}$ at 300 K.

Discussion

34.	What is INDUCTIVE REACTANCE?
Answer» What is INDUCTIVE REACTANCE?

Discussion

35.	3 Why carbon cannot form four bonds that is why C2 will not form?
Answer» 3 Why carbon cannot form four bonds that is why C2 will not form?

Discussion

36.	10 gram of ice at -20 degree celsius is kept into calorimetre containing 10 gram of water at 10 degree Celsius the specific heat fo water is 2X is that of ice. When equilibrium is reach the calorimetre will contain
Answer» 10 gram of ice at -20 degree celsius is kept into calorimetre containing 10 gram of water at 10 degree Celsius the specific heat fo water is 2X is that of ice. When equilibrium is reach the calorimetre will contain

Discussion

37.	38.Determine the centre of mass of a homogeneous , semicircular plate of radius r.
Answer» 38.Determine the centre of mass of a homogeneous , semicircular plate of radius r.

Discussion

38.	Paragraph :In metal excess defect, anions all missed from their lattice sites and they are occupied by electrons to maintain electrical neutrality. These sites occupied by electrons are called F-centers. Question: The colour of NaCl changes when heated in sodium vapour due to
Answer» Paragraph :In metal excess defect, anions all missed from their lattice sites and they are occupied by electrons to maintain electrical neutrality. These sites occupied by electrons are called F-centers. Question: The colour of NaCl changes when heated in sodium vapour due to

38.

Paragraph :In metal excess defect, anions all missed from their lattice sites and they are occupied by electrons to maintain electrical neutrality. These sites occupied by electrons are called F-centers. Question: The colour of NaCl changes when heated in sodium vapour due to

Answer»

Paragraph :In metal excess defect, anions all missed from their lattice sites and they are occupied by electrons to maintain electrical neutrality. These sites occupied by electrons are called F-centers.

Question: The colour of NaCl changes when heated in sodium vapour due to

Discussion

39.	waht is scape velocity?
Answer» waht is scape velocity?

Discussion

40.	Colloidal solution of cellulose nitrate in alcohol is called
Answer» Colloidal solution of cellulose nitrate in alcohol is called

Discussion

41.	Is 1.000 in scientific notation
Answer» Is 1.000 in scientific notation

Discussion

42.	8. Vant Hoff factor for K2SO4
Answer» 8. Vant Hoff factor for K2SO4

Discussion

43.	The electron gain enthalpy (H_{eg}) of ana element 'A' is 200 kJ/mol. The electron affinity (A_e) of 'A' at absolute temperature can be (1) -200 kJ/mol (2) -201 kJ/mol (3) 200 kJ/mol (4) 100 kJ/mol
Answer» The electron gain enthalpy (H_{eg}) of ana element 'A' is 200 kJ/mol. The electron affinity (A_e) of 'A' at absolute temperature can be (1) -200 kJ/mol (2) -201 kJ/mol (3) 200 kJ/mol (4) 100 kJ/mol

Discussion

44.	2 moles of PCl_5 were introduced in a 2 litre flask and heated 625k to establish equillibrium when 60% PCl_5 dissocated into PCl_3 and Cl_2.K_c(equillibrium cons†an t would be
Answer» 2 moles of PCl_5 were introduced in a 2 litre flask and heated 625k to establish equillibrium when 60% PCl_5 dissocated into PCl_3 and Cl_2.K_c(equillibrium cons†an t would be

Discussion

45.	In a reaction of aniline a coloured product C was obtained.
Answer» In a reaction of aniline a coloured product $C$ was obtained.

45.

In a reaction of aniline a coloured product C was obtained.

Answer»

In a reaction of aniline a coloured product $C$ was obtained.

Discussion

46.	Maximum value of ( n +l+m) for unpaired electrons in second excited state of chlorine 17Cl is
Answer» Maximum value of ( n +l+m) for unpaired electrons in second excited state of chlorine ₁₇Cl is

Discussion

47.	Explain the formation of a chemical bond.
Answer» Explain the formation of a chemical bond.

Discussion

48.	Possible number of enantiomeric pairs for [Co(gly)3] is/are:
Answer» Possible number of enantiomeric pairs for $[C o (g l y)_{3}]$ is/are:

Discussion

49.	In a hydrogen atom, if energy of an electron ground state is -13.6 eV , then calculate the energy in the 2nd excited state
Answer» In a hydrogen atom, if energy of an electron ground state is -13.6 eV , then calculate the energy in the 2nd excited state

Discussion

50.	The arsenius sulphide sol has negative charge the maximum coagulating power for precipitating it is of -
Answer» The arsenius sulphide sol has negative charge the maximum coagulating power for precipitating it is of -

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Calculate the change in entropy of 1 mole of ideal gass, when temperature is lower down to 1/8 of initial temperature at constant volume is ?

74. Calculate the number of formula units of a crystal AB having CsCl type structure in 240gm. The unit cell edge length of AB is 200pm and density of the crystal is 6g/ cc ??

Name the method that is used for refining of nickel.

why is HCOOH more acidic than benzoic acid?

The molar mass (g/mol) of final product C in above reaction is

Atomic number is considered to be a more appropriate parameter than atomic mass for the classification of elements in a periodic table. Why?How does atomic size of elements vary on moving from:(i) left to right in a period?(ii) top to bottom in a group?​Give reasons for your answers.

Which is an unsaturated hydrocarbon?

Mole of thiosulphate ions required to react completely with one mole of permanganate ion in faintly alkaline medium is 1.2/5 2.2/3 3.3/8 4.3/

how to find degree of association ?

Which of the following statement is not true for halogens ? 1) All form monobasic oxyacids. 2) All are oxidizing agents. 3) All but fluorine show positive oxidation states. 4) Chlorine has the highest electron gain enthalpy.

Why 3 degree compound do not show acylation and shows alkylation

How many of the following compound(s) cannot be prepared:1.XeF22.XeF33.XeF54.XeF6

Multiplication of electron velocity and radius for a orbit in an atom is 1) proptional to mass of electron 2) proptional to square of mass of electron 3) inversely proptional to mass of electron 4) does not depend upon mass of electron

The following ether, when treated with HI produces:

The number of water molecules present in 2 litres of water is:

What is the number of atoms in a unit cell of a face-centred cubic crystal?

Why is use of aspartame limited to cold foods and drinks?

What is the name of the covering membrane of gemule

The major components of polyester are

Lithium nitrate is heated to give:

A unit cell consists of a cube in which there are anions Y at each corner and cations X at the centre of alternate faces of the unit cell. What is the simplest formula of the compound?

The major product H given in the reaction sequence is:

A reaction involving different reactants can never be:

Cotton is a natural polymer. What is its chemical name?​

72 Arrange in decreasing order of R reactivity towards aromatic Electrophilic substitution reaction:- 1) C6H5OCH3 2) C6H5OCH2H3 3) C6H5NHCOCH2CH3 4) C6H5NHCOCH3 The drawn structures of the given compounds is attached.

Why glucose and alcohol donot dissociate in water to produce h+ ions?

Which type electronic configuration is 1s(to the power 2) 2 s (to the power 2 ) 2 p ( to the power 2)? Kindly explain it.

A compound C9H7O2Cl exists predominantly in enol form (A) and also in Keto form (B). On oxidation with KMnO4 it gives m-chlorobenzoic acid as one of the products.Identify the compound (A) and (B).

Magnesium wire burns in the atmosphere of CO2 because

If concentration of reactant is increased by m moles, then k (rate constant) becomes:

What is +H effect, is there -H effect also ?What are these?in methyl carboxylic acid" the hyperconjugation and +I effect both operate in para isomer while in metal isomerit is only +I effect."Why so?

Calculate the entropy change when 2 mol of an ideal gas expands isothermally and reversibly from an initial volume of 10 dm3 to 100 dm3 at 300 K.

What is INDUCTIVE REACTANCE?

3 Why carbon cannot form four bonds that is why C2 will not form?

10 gram of ice at -20 degree celsius is kept into calorimetre containing 10 gram of water at 10 degree Celsius the specific heat fo water is 2X is that of ice. When equilibrium is reach the calorimetre will contain

38.Determine the centre of mass of a homogeneous , semicircular plate of radius r.

Paragraph :In metal excess defect, anions all missed from their lattice sites and they are occupied by electrons to maintain electrical neutrality. These sites occupied by electrons are called F-centers. Question: The colour of NaCl changes when heated in sodium vapour due to

waht is scape velocity?

Colloidal solution of cellulose nitrate in alcohol is called

Is 1.000 in scientific notation

8. Vant Hoff factor for K2SO4

The electron gain enthalpy (H_{eg}) of ana element 'A' is 200 kJ/mol. The electron affinity (A_e) of 'A' at absolute temperature can be (1) -200 kJ/mol (2) -201 kJ/mol (3) 200 kJ/mol (4) 100 kJ/mol

2 moles of PCl_5 were introduced in a 2 litre flask and heated 625k to establish equillibrium when 60% PCl_5 dissocated into PCl_3 and Cl_2.K_c(equillibrium cons†an t would be

In a reaction of aniline a coloured product C was obtained.

Maximum value of ( n +l+m) for unpaired electrons in second excited state of chlorine 17Cl is

Explain the formation of a chemical bond.

Possible number of enantiomeric pairs for [Co(gly)3] is/are:

In a hydrogen atom, if energy of an electron ground state is -13.6 eV , then calculate the energy in the 2nd excited state

The arsenius sulphide sol has negative charge the maximum coagulating power for precipitating it is of -

Atomic number is considered to be a more appropriate parameter than atomic mass for the classification of elements in a periodic table. Why?How does atomic size of elements vary on moving from:(i) left to right in a period?(ii) top to bottom in a group?Give reasons for your answers.

Cotton is a natural polymer. What is its chemical name?