46295 + Interview Questions in Chemistry

1.	The equilibrium composition in 1 litre container for the reaction is PCl3 + Cl2⇌PCl50.20 0.08 0.40 0.22 mole of Cl2 is added at the same temperature and a new equilibrium is established. If the sum of the new equilibrium moles of PCl3,Cl2 and PCl5 is p, then value of p is
Answer» The equilibrium composition in 1 litre container for the reaction is $P C l_{3} + C l_{2} ⇌ P C l_{5} 0.20 0.08 0.40$ 0.22 mole of $C l_{2}$ is added at the same temperature and a new equilibrium is established. If the sum of the new equilibrium moles of $P C l_{3}, C l_{2} a n d P C l_{5}$ is p, then value of p is

Discussion

2.	Mixture of volatile components of A and B has total vapour presssure (in torr) P=254-119Xa, where Xa is the mole fraction of component A in mixture . hence pure vapour pressure of A and B (in torr)
Answer» Mixture of volatile components of A and B has total vapour presssure (in torr) P=254-119Xa, where Xa is the mole fraction of component A in mixture . hence pure vapour pressure of A and B (in torr)

Discussion

3.	An alloy of Cu, Ag and Au is found to have copper in a CCP lattice. If the silver atoms occupy the edge centre and gold is present at the body centre, the alloy has a formula:
Answer» An alloy of Cu, Ag and Au is found to have copper in a CCP lattice. If the silver atoms occupy the edge centre and gold is present at the body centre, the alloy has a formula:

Discussion

4.	Explain in detail what is PHOTOELECTRIC EFFECT?
Answer» Explain in detail what is PHOTOELECTRIC EFFECT?

Discussion

5.	In a cyclic process, heat transfers are +34.7 kJ , −15.2 kJ, −13.56 kJ and +21.5 kJ. What is the net work done in the process?
Answer» In a cyclic process, heat transfers are $+ 34.7 k J$ , $- 15.2 k J$ , $- 13.56 k J$ and $+ 21.5 k J$ . What is the net work done in the process?

Discussion

6.	If the shortest wavelength of the Lyman series of H atom is x, then the wavelength of the first line of Balmer series of H atom will be:
Answer» If the shortest wavelength of the Lyman series of H atom is x, then the wavelength of the first line of Balmer series of H atom will be:

Discussion

7.	Al2O3 can be reduced by carbon at a temperature of :
Answer» $A l_{2} O_{3}$ can be reduced by carbon at a temperature of :

Discussion

8.	End product due to hydrolysis of (A) and subsequent heating is
Answer» End product due to hydrolysis of (A) and subsequent heating is

Discussion

9.	What is the reaction between propene and Br.CCl3 in the presence of peroxide. Which radical attacks first on propene and why.
Answer» What is the reaction between propene and Br.CCl3 in the presence of peroxide. Which radical attacks first on propene and why.

Discussion

10.	if 1 mole of aq nitric acid is formed calculate total heat released 4NH_3 + 5O_2 →4NO + 6H_2O -904kj 2NO + O2 →2NO2 -112kj 3NO2 + H2O →2HNO3 + NO -140k
Answer» if 1 mole of aq nitric acid is formed calculate total heat released 4NH_3 + 5O_2 →4NO + 6H_2O -904kj 2NO + O2 →2NO2 -112kj 3NO2 + H2O →2HNO3 + NO -140k

Discussion

11.	Enthalpy of combustion ofBenzene is 500 KJ molCalculate internal energy for combustionof I mol benzene
Answer» Enthalpy of combustion of Benzene is 500 KJ mol Calculate internal energy for combustion of I mol benzene

Discussion

12.	Find the amount of water present, if the total number of protons is 1.2046×1025.
Answer» Find the amount of water present, if the total number of protons is $1.2046 \times 10^{25}$ .

Discussion

13.	a solution of Naoh is 4gl^{-1} what volume of hcl gas at STP will neutralize 50ml of the alkali solutio
Answer» a solution of Naoh is 4gl^{-1} what volume of hcl gas at STP will neutralize 50ml of the alkali solutio

Discussion

14.	calculate the van't hoff factor for a binary solute undergoing 100% dissociation
Answer» calculate the van't hoff factor for a binary solute undergoing 100% dissociation

Discussion

15.	In colloidal system, 1nm - 1000nm is the particle size of:
Answer» In colloidal system, 1nm - 1000nm is the particle size of:

Discussion

16.	what is second separation energy of electron in H atom ?
Answer» what is second separation energy of electron in H atom ?

Discussion

17.	Product is
Answer» Product is

Discussion

18.	A gas mixture 3.67 L in volume contains C2H4 and CH4 is proportion of 2:1 by moles and is at 25∘C and 1 atm. If the ΔHC (C2H4) and ΔHC (CH4) are −1400 and −900 kJ/mol find heat evolved on burning this mixture
Answer» A gas mixture $3.67 L$ in volume contains $C_{2} H_{4}$ and $C H_{4}$ is proportion of $2 : 1$ by moles and is at $25^{\circ} C$ and $1 a t m$ . If the $Δ H_{C}$ ( $C_{2} H_{4})$ and $Δ H_{C}$ $(C H_{4})$ are $- 1400$ and $- 900 k J / m o l$ find heat evolved on burning this mixture

Discussion

19.	The enthalpy change for the reaction, (g)C2H4 + 3O2(g) ⟶2CO2(g) + 2H2O(g) is called:
Answer» The enthalpy change for the reaction, $(g) C_{2} H_{4} + 3 O_{2} (g) ⟶ 2 C O_{2} (g) + 2 H_{2} O (g)$ is called:

Discussion

20.	The percentage of free SO3 in 109% oleum is:
Answer» The percentage of free $S O_{3}$ in $109 %$ oleum is:

Discussion

21.	Which of the following compounds can show geometrical isomerism ?
Answer» Which of the following compounds can show geometrical isomerism ?

Discussion

22.	The correct order for homolytic bond dissociation energies (△ H in kcal/mol) for CH4(A), C2H6 (B) and CH3Br (C) is (1) C>B>A (2) B>C>A (3) C>A>B (4) A>B>C
Answer» The correct order for homolytic bond dissociation energies (△ H in kcal/mol) for CH4(A), C2H6 (B) and CH3Br (C) is (1) C>B>A (2) B>C>A (3) C>A>B (4) A>B>C

Discussion

23.	The boiling point of a solution made by dissolving 12.0 g of glucose in 100 g of water is 100.34∘C. Calculate the molecular weight of glucose; Kb for water =0.52∘C/m.
Answer» The boiling point of a solution made by dissolving 12.0 g of glucose in 100 g of water is ${100.34}^{\circ} C$ . Calculate the molecular weight of glucose; $K_{b}$ for water $= {0.52}^{\circ} C / m$ .

Discussion

24.	Which of the following can be used as anesthetic?
Answer» Which of the following can be used as anesthetic?

Discussion

25.	29.Which of the following alkane(s) cannot be synthesized by the Wurtz reaction in good yield (a) (CH3)2CHCH2CH(CH3)2 (b) (CH3)3CCH2CH2CH2CH3 (c) CH3CH2CH2CH3 (d) (CH3)2CHCH2CH2CH(CH3)2
Answer» 29.Which of the following alkane(s) cannot be synthesized by the Wurtz reaction in good yield (a) (CH3)2CHCH2CH(CH3)2 (b) (CH3)3CCH2CH2CH2CH3 (c) CH3CH2CH2CH3 (d) (CH3)2CHCH2CH2CH(CH3)2

Discussion

26.	Knowing the electron gain enthalpy values for O → O− and O → O2− as −141 and 702 kJ mol−1 respectively, how can you account for the formation of a large number of oxides having O2− species and not O−? (Hint: Consider lattice energy factor in the formation of compounds).
Answer» Knowing the electron gain enthalpy values for O → O⁻ and O → O²⁻ as −141 and 702 kJ mol⁻¹ respectively, how can you account for the formation of a large number of oxides having O²⁻ species and not O⁻? (Hint: Consider lattice energy factor in the formation of compounds).

26.

Knowing the electron gain enthalpy values for O → O− and O → O2− as −141 and 702 kJ mol−1 respectively, how can you account for the formation of a large number of oxides having O2− species and not O−? (Hint: Consider lattice energy factor in the formation of compounds).

Answer»

Knowing
the electron gain enthalpy values for O → O⁻
and O → O²⁻
as −141

and
702 kJ mol⁻¹
respectively, how can you account for the formation of a

large
number of oxides having O²⁻
species and not O⁻?

(Hint:
Consider lattice energy factor in the formation of compounds).

Discussion

27.	which of following is non-planar: (1) (BeCl2)2 (2) \lbrack Pt(CN)4\rbrack^-2 (3) SO3 (4) XeO3
Answer» which of following is non-planar: (1) (BeCl2)2 (2) \lbrack Pt(CN)4\rbrack^-2 (3) SO3 (4) XeO3

Discussion

28.	21. How to calculate ksp of a saturated salt by using nernst's equation
Answer» 21. How to calculate ksp of a saturated salt by using nernst's equation

Discussion

29.	What is the reason behind compressibility of gases?
Answer» What is the reason behind compressibility of gases?

Discussion

30.	A tiny positively charged particle is moving head-on towards a heavy nucleus. The distance of closest approach depends upon,
Answer» A tiny positively charged particle is moving head-on towards a heavy nucleus. The distance of closest approach depends upon,

Discussion

31.	The structure of orthophosphoric acid is
Answer» The structure of orthophosphoric acid is

Discussion

32.	The bond length and bond angles in molecules in the solid state are calculated by
Answer» The bond length and bond angles in molecules in the solid state are calculated by

Discussion

33.	Find the number of atoms in 20 grams of so3
Answer» Find the number of atoms in 20 grams of so3

Discussion

34.	AX is a covalent diatomic molecule where A and X are second-row elements of the periodic table. Based on molecular orbital theory, the bond order of AX is 2.5. The total number of electrons in AX is (Round off to the Nearest Integer).
Answer» $A X$ is a covalent diatomic molecule where $A$ and $X$ are second-row elements of the periodic table. Based on molecular orbital theory, the bond order of $A X$ is $2.5$ . The total number of electrons in $A X$ is (Round off to the Nearest Integer).

Discussion

35.	N moles of a monoatomic gas is carries roung the reversible reac†an gular cycle ABCDA as shown in the diagram the temperature at A is T the thermodynamic effiviency of the cycle is
Answer» N moles of a monoatomic gas is carries roung the reversible reac†an gular cycle ABCDA as shown in the diagram the temperature at A is T the thermodynamic effiviency of the cycle is

Discussion

36.	In the reaction, As2S3+xNO−3 + yH+ ⟶ 2AsSO4 + zNO2 + aS+ 2H2O Find the coeffieicnts x , y, z and a (Respectively)
Answer» In the reaction, $A s_{2} S_{3}$ + $x N O_{3}^{-}$ + $y H^{+}$ $⟶$ $2 A s S O_{4}$ + $z N O_{2}$ + aS+ $2 H_{2} O$ Find the coeffieicnts x , y, z and a (Respectively)

Discussion

37.	Paracetamol is
Answer» Paracetamol is

Discussion

38.	Which of the following species is not partial helide ? A)CNO B)RCOO C)OCN D)NNN
Answer» Which of the following species is not partial helide ? A)CNO B)RCOO C)OCN D)NNN

Discussion

39.	Shape of the molecule having sp hybridization is
Answer» Shape of the molecule having sp hybridization is

Discussion

40.	Liquid nitrogen is in vapour form, so why it is given the name liquid nitrogen and not vapour nitrogen?
Answer» Liquid nitrogen is in vapour form, so why it is given the name liquid nitrogen and not vapour nitrogen?

Discussion

41.	What is the hybridization of central atom of anion present in the product formed when NaCl reacts with ICl?जब NaCl की ICl के साथ अभिक्रिया करायी जाती है, तो निर्मित उत्पाद में उपस्थित ऋणायन के केन्द्रीय परमाणु का संकरण क्या है?
Answer» What is the hybridization of central atom of anion present in the product formed when NaCl reacts with ICl? जब NaCl की ICl के साथ अभिक्रिया करायी जाती है, तो निर्मित उत्पाद में उपस्थित ऋणायन के केन्द्रीय परमाणु का संकरण क्या है?

Discussion

42.	In the cell Pt(s)\vert H_2(g, 1bar)\vert HCl(aq)\vert AgCl(s)\vert Ag(s)\vert Pt(s) the cell potential is 0.92 when a 10^{-6}molal HCl solution is used. The s†an dard electrode potential of (AgCl/Ag,Cl –) electrode is : (1) 0.20 V (2) 0.76 V (3) 0.40 V (4) 0.94 V ?
Answer» In the cell Pt(s)\vert H_2(g, 1bar)\vert HCl(aq)\vert AgCl(s)\vert Ag(s)\vert Pt(s) the cell potential is 0.92 when a 10^{-6}molal HCl solution is used. The s†an dard electrode potential of (AgCl/Ag,Cl –) electrode is : (1) 0.20 V (2) 0.76 V (3) 0.40 V (4) 0.94 V ?

Discussion

43.	why aromatic aldehydes do not show nucliophilic addition reaction ?
Answer» why aromatic aldehydes do not show nucliophilic addition reaction ?

Discussion

44.	A blackened silver coin weighing 15 gm on treatment with HCl yeilded 25 ml of H2S at 12 degree centigrade and 775 mm pressure. What % of the original silver tarnished?
Answer» A blackened silver coin weighing 15 gm on treatment with HCl yeilded 25 ml of H2S at 12 degree centigrade and 775 mm pressure. What % of the original silver tarnished?

Discussion

45.	हमको optical isomer के बारे में कैसे पता चलेगा कि वह optically active or inactive?
Answer» हमको optical isomer के बारे में कैसे पता चलेगा कि वह optically active or inactive?

Discussion

46.	The chemical composition of slag formed during smelting process in the extraction of Cu is
Answer» The chemical composition of slag formed during smelting process in the extraction of Cu is

Discussion

47.	The arrangement of X− ions around A+ ion in soild AX is given in the figure(not drawn to scale). If the radius of X− is 250 pm, the radius of A+is:
Answer» The arrangement of $X^{-}$ ions around $A^{+}$ ion in soild $A X$ is given in the figure(not drawn to scale). If the radius of $X^{-}$ is 250 pm, the radius of $A^{+}$ is:

47.

The arrangement of X− ions around A+ ion in soild AX is given in the figure(not drawn to scale). If the radius of X− is 250 pm, the radius of A+is:

Answer»

The arrangement of $X^{-}$ ions around $A^{+}$ ion in soild $A X$ is given in the figure(not drawn to scale). If the radius of $X^{-}$ is 250 pm, the radius of $A^{+}$ is:

Discussion

48.	In the reaction 4A + 2B + 3C → A4B2C3 What will be the number of moles of product formed starting from 1 mol of A, 0.6 mol of B and 0.72 mol of C ?
Answer» In the reaction $4 A + 2 B + 3 C \to A_{4} B_{2} C_{3}$ What will be the number of moles of product formed starting from 1 $m o l$ of A, $0.6 m o l$ of B and $0.72 m o l$ of C ?

Discussion

49.	Calculate the wavelength associated with an electron moving with a velocity of 1010cm/s.
Answer» Calculate the wavelength associated with an electron moving with a velocity of $10^{10} c m / s .$

Discussion

50.	The mean free path (λ) for an ideal gas at constant pressure with molecular diameter d in terms of absolute temperature T has relation -
Answer» The mean free path $(λ)$ for an ideal gas at constant pressure with molecular diameter $d$ in terms of absolute temperature $T$ has relation -

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The equilibrium composition in 1 litre container for the reaction is PCl3 + Cl2⇌PCl50.20 0.08 0.40 0.22 mole of Cl2 is added at the same temperature and a new equilibrium is established. If the sum of the new equilibrium moles of PCl3,Cl2 and PCl5 is p, then value of p is

Mixture of volatile components of A and B has total vapour presssure (in torr) P=254-119Xa, where Xa is the mole fraction of component A in mixture . hence pure vapour pressure of A and B (in torr)

An alloy of Cu, Ag and Au is found to have copper in a CCP lattice. If the silver atoms occupy the edge centre and gold is present at the body centre, the alloy has a formula:

Explain in detail what is PHOTOELECTRIC EFFECT?

In a cyclic process, heat transfers are +34.7 kJ , −15.2 kJ, −13.56 kJ and +21.5 kJ. What is the net work done in the process?

If the shortest wavelength of the Lyman series of H atom is x, then the wavelength of the first line of Balmer series of H atom will be:

Al2O3 can be reduced by carbon at a temperature of :

End product due to hydrolysis of (A) and subsequent heating is

What is the reaction between propene and Br.CCl3 in the presence of peroxide. Which radical attacks first on propene and why.

if 1 mole of aq nitric acid is formed calculate total heat released 4NH_3 + 5O_2 →4NO + 6H_2O -904kj 2NO + O2 →2NO2 -112kj 3NO2 + H2O →2HNO3 + NO -140k

Enthalpy of combustion ofBenzene is 500 KJ molCalculate internal energy for combustionof I mol benzene

Find the amount of water present, if the total number of protons is 1.2046×1025.

a solution of Naoh is 4gl^{-1} what volume of hcl gas at STP will neutralize 50ml of the alkali solutio

calculate the van't hoff factor for a binary solute undergoing 100% dissociation

In colloidal system, 1nm - 1000nm is the particle size of:

what is second separation energy of electron in H atom ?

Product is

A gas mixture 3.67 L in volume contains C2H4 and CH4 is proportion of 2:1 by moles and is at 25∘C and 1 atm. If the ΔHC (C2H4) and ΔHC (CH4) are −1400 and −900 kJ/mol find heat evolved on burning this mixture

The enthalpy change for the reaction, (g)C2H4 + 3O2(g) ⟶2CO2(g) + 2H2O(g) is called:

The percentage of free SO3 in 109% oleum is:

Which of the following compounds can show geometrical isomerism ?

The correct order for homolytic bond dissociation energies (△ H in kcal/mol) for CH4(A), C2H6 (B) and CH3Br (C) is (1) C>B>A (2) B>C>A (3) C>A>B (4) A>B>C

The boiling point of a solution made by dissolving 12.0 g of glucose in 100 g of water is 100.34∘C. Calculate the molecular weight of glucose; Kb for water =0.52∘C/m.

Which of the following can be used as anesthetic?

29.Which of the following alkane(s) cannot be synthesized by the Wurtz reaction in good yield (a) (CH3)2CHCH2CH(CH3)2 (b) (CH3)3CCH2CH2CH2CH3 (c) CH3CH2CH2CH3 (d) (CH3)2CHCH2CH2CH(CH3)2

Knowing the electron gain enthalpy values for O → O− and O → O2− as −141 and 702 kJ mol−1 respectively, how can you account for the formation of a large number of oxides having O2− species and not O−? (Hint: Consider lattice energy factor in the formation of compounds).

which of following is non-planar: (1) (BeCl2)2 (2) \lbrack Pt(CN)4\rbrack^-2 (3) SO3 (4) XeO3

21. How to calculate ksp of a saturated salt by using nernst's equation

What is the reason behind compressibility of gases?

A tiny positively charged particle is moving head-on towards a heavy nucleus. The distance of closest approach depends upon,

The structure of orthophosphoric acid is

The bond length and bond angles in molecules in the solid state are calculated by

Find the number of atoms in 20 grams of so3

AX is a covalent diatomic molecule where A and X are second-row elements of the periodic table. Based on molecular orbital theory, the bond order of AX is 2.5. The total number of electrons in AX is (Round off to the Nearest Integer).

N moles of a monoatomic gas is carries roung the reversible reac†an gular cycle ABCDA as shown in the diagram the temperature at A is T the thermodynamic effiviency of the cycle is

In the reaction, As2S3+xNO−3 + yH+ ⟶ 2AsSO4 + zNO2 + aS+ 2H2O Find the coeffieicnts x , y, z and a (Respectively)

Paracetamol is

Which of the following species is not partial helide ? A)CNO B)RCOO C)OCN D)NNN

Shape of the molecule having sp hybridization is

Liquid nitrogen is in vapour form, so why it is given the name liquid nitrogen and not vapour nitrogen?

In the cell Pt(s)\vert H_2(g, 1bar)\vert HCl(aq)\vert AgCl(s)\vert Ag(s)\vert Pt(s) the cell potential is 0.92 when a 10^{-6}molal HCl solution is used. The s†an dard electrode potential of (AgCl/Ag,Cl –) electrode is : (1) 0.20 V (2) 0.76 V (3) 0.40 V (4) 0.94 V ?

why aromatic aldehydes do not show nucliophilic addition reaction ?

A blackened silver coin weighing 15 gm on treatment with HCl yeilded 25 ml of H2S at 12 degree centigrade and 775 mm pressure. What % of the original silver tarnished?

हमको optical isomer के बारे में कैसे पता चलेगा कि वह optically active or inactive?

The chemical composition of slag formed during smelting process in the extraction of Cu is

The arrangement of X− ions around A+ ion in soild AX is given in the figure(not drawn to scale). If the radius of X− is 250 pm, the radius of A+is:

In the reaction 4A + 2B + 3C → A4B2C3 What will be the number of moles of product formed starting from 1 mol of A, 0.6 mol of B and 0.72 mol of C ?

Calculate the wavelength associated with an electron moving with a velocity of 1010cm/s.

The mean free path (λ) for an ideal gas at constant pressure with molecular diameter d in terms of absolute temperature T has relation -