46295 + Interview Questions in Chemistry

1.	The following reaction is made to reach equilibrium.3H2 + N2 gives 2NH3What will be the effect of equilibrium if the volume of the vessel is decreased?
Answer» The following reaction is made to reach equilibrium. 3H2 + N2 gives 2NH3 What will be the effect of equilibrium if the volume of the vessel is decreased?

Discussion

2.	the standard heat of formation at 298K for CCl4(g) , H2O(g) , CO2(g) and HCl(g) are -25.5 , -57.8 , -94.1 and -22.1 cal/mol respectively , calculate ΔrH of reaction , CCl4(g) + 2H2O(g) →CO2(g) + 4HCl(g)
Answer» the standard heat of formation at 298K for CCl4(g) , H2O(g) , CO2(g) and HCl(g) are -25.5 , -57.8 , -94.1 and -22.1 cal/mol respectively , calculate ΔrH of reaction , CCl4(g) + 2H2O(g) →CO2(g) + 4HCl(g)

Discussion

3.	What are the different day to day practical phenomenons that we can observe due to the following :-1) Interference of light [Like- Color rings in Oil drop etc]2) Diffraction of light?3) Scattering of light?
Answer» What are the different day to day practical phenomenons that we can observe due to the following :- 1) Interference of light [Like- Color rings in Oil drop etc] 2) Diffraction of light? 3) Scattering of light?

Discussion

4.	How many moles of acetic acid should be addedto 100 ml of 0.6 M formic acid solution such thatthe percentage dissociation of formic acid remainsunchanged? The value of Ka for acetic acid = 1.8 ×10−5 and Ka for formic acid = 2.4 × 10−4.
Answer» How many moles of acetic acid should be added to 100 ml of 0.6 M formic acid solution such that the percentage dissociation of formic acid remains unchanged? The value of Ka for acetic acid = 1.8 × 10−5 and Ka for formic acid = 2.4 × 10−4.

Discussion

5.	depression in freezing point of 0.01 molal aq CH3COOH soln is 0.0204 C . 1 molal urea soln freezes at -1.86 C . assuming molality =MOLARITY , pH of CH3COOH sol is 2 3 3.2 4.2
Answer» depression in freezing point of 0.01 molal aq CH3COOH soln is 0.0204 C . 1 molal urea soln freezes at -1.86 C . assuming molality =MOLARITY , pH of CH3COOH sol is 2 3 3.2 4.2

Discussion

6.	How number of electron determines the chemical property of element?
Answer» How number of electron determines the chemical property of element?

Discussion

7.	CO2 will be considered as a polar molecule or non polar molecule??
Answer» CO2 will be considered as a polar molecule or non polar molecule??

Discussion

8.	Identify incorrect statements among the following I. Benzene diazonium chloride with hypophosphorous acid solution gives benzeneamine and phosphorous acid II. Benzene diazonium chloride with phenol at PH> 7 gives yellow coloured dye III. Benzene diazonium chloride with cuprous chloride and HCl gives chlorobenzene is called as Gattermann reaction IV. Benzenediazonium chloride on hydrolysis with water at 100C gives phenol
Answer» Identify incorrect statements among the following I. Benzene diazonium chloride with hypophosphorous acid solution gives benzeneamine and phosphorous acid II. Benzene diazonium chloride with phenol at P^H> 7 gives yellow coloured dye III. Benzene diazonium chloride with cuprous chloride and HCl gives chlorobenzene is called as Gattermann reaction IV. Benzenediazonium chloride on hydrolysis with water at 10⁰C gives phenol

Discussion

9.	{ †ext { Consider the following reaction: } } { aC _ { 0 } H _ { 6 } + bO _ { 2 } → CCO _ { 2 } + dH _ { 2 } O } { †ext { On balancing, the ratio } b : c †ext { is }
Answer» { †ext { Consider the following reaction: } } { aC _ { 0 } H _ { 6 } + bO _ { 2 } → CCO _ { 2 } + dH _ { 2 } O } { †ext { On balancing, the ratio } b : c †ext { is }

Discussion

10.	16. x moles of potassium dichromate oxidises 1 mol of ferrous oxalate in acidic medium here x is.
Answer» 16. x moles of potassium dichromate oxidises 1 mol of ferrous oxalate in acidic medium here x is.

Discussion

11.	Find the work done when 2 moles of hydrogen expands isothermally from 15 L to 50 L against a constant pressure of 1 atm at 250C.
Answer» Find the work done when $2$ moles of hydrogen expands isothermally from $15$ L to $50$ L against a constant pressure of 1 atm at $25^{0} C$ .

Discussion

12.	What is precision ? Can precise and accurate value be same in any case ?
Answer» What is precision ? Can precise and accurate value be same in any case ?

Discussion

13.	Silicon dioxide made up of silicon and oxygen contains 46.7% by mass of silicon. With what mass of oxygen will 10g of silicon combine
Answer» Silicon dioxide made up of silicon and oxygen contains 46.7% by mass of silicon. With what mass of oxygen will 10g of silicon combine

Discussion

14.	A cyclic process is shown in the given P−T digram of an ideal gas. Which of the following curves shows the same process in P−V diagram:
Answer» A cyclic process is shown in the given $P - T$ digram of an ideal gas. Which of the following curves shows the same process in $P - V$ diagram:

Discussion

15.	The intermetallic compound LiAg crystallizes in cubic lattice in which both lithium and silver have coordination number of eight.The crystal class is 1) Face-centered cube 2) Simple cube 3) Body--centered cube 4) None of these
Answer» The intermetallic compound LiAg crystallizes in cubic lattice in which both lithium and silver have coordination number of eight.The crystal class is 1) Face-centered cube 2) Simple cube 3) Body--centered cube 4) None of these

15.

The intermetallic compound LiAg crystallizes in cubic lattice in which both lithium and silver have coordination number of eight.The crystal class is 1) Face-centered cube 2) Simple cube 3) Body--centered cube 4) None of these

Answer»

The intermetallic compound LiAg crystallizes in cubic lattice in which both lithium and silver have coordination number of eight.The crystal class is

1) Face-centered cube

2) Simple cube

3) Body--centered cube

4) None of these

Discussion

16.	Taj Mahal marble is affected by
Answer» Taj Mahal marble is affected by

Discussion

17.	Which of the following compounds will give a significant amount of meta-product during mono - nitration reaction?
Answer» Which of the following compounds will give a significant amount of meta-product during mono - nitration reaction?

Discussion

18.	A weak base BOH is titrated with a strong acid HA. When 10 ml of HA is added, pH is found to be 9.00 and when 25 ml is added, pH is 8.00. The volume of the acid required to reach the equivalence point is (a) 35 mL (b) 40 mL (c) 30 mL (d) 50 mL.
Answer» A weak base BOH is titrated with a strong acid HA. When 10 ml of HA is added, pH is found to be 9.00 and when 25 ml is added, pH is 8.00. The volume of the acid required to reach the equivalence point is (a) 35 mL (b) 40 mL (c) 30 mL (d) 50 mL.

Discussion

19.	Give the correct order of T or F for following statements. If the statement is correct then Use T and F if it is false.1.HF boils at a higher temperature than HCl2. HBr boils at lower temperature than HI3. Bond length of N2 is less than N+24. F2 has higher boiling point than Cl2
Answer» Give the correct order of T or F for following statements. If the statement is correct then Use T and F if it is false. 1. $H F$ boils at a higher temperature than $H C l$ 2. $H B r$ boils at lower temperature than $H I$ 3. Bond length of $N_{2}$ is less than $N_{2}^{+}$ 4. $F_{2}$ has higher boiling point than $C l_{2}$

Discussion

20.	3o2_____>2o3 is formed and enthalpy change is 286kj Find enthalpy change in formation of o3
Answer» 3o2_____>2o3 is formed and enthalpy change is 286kj Find enthalpy change in formation of o3

Discussion

21.	compound A (C6H8) which is optically active ,react with excess H2 in Pd to give C6H14 which is resolvable compound.how many moles of H2 molecules are required for the hydrogenation of compound A?
Answer» compound A (C6H8) which is optically active ,react with excess H2 in Pd to give C6H14 which is resolvable compound.how many moles of H2 molecules are required for the hydrogenation of compound A?

Discussion

22.	Calculate the percentage of p − character of the orbitals of ‘B′ atom involved in bonding with H-atom in BH3 molecule.
Answer» Calculate the percentage of $p -$ character of the orbitals of $‘ B^{'}$ atom involved in bonding with $H$ -atom in $B H_{3}$ molecule.

Discussion

23.	The heats of combustion of carbon and carbon monoxide are −283.5 and −283.5 kJ mol−1 respectively. The heat of formation (in kJ) of carbon monoxide per mole is
Answer» The heats of combustion of carbon and carbon monoxide are $- 283.5 a n d - 283.5 k J m o l^{- 1}$ respectively. The heat of formation (in kJ) of carbon monoxide per mole is

Discussion

24.	35 mL of 1.5 M Pb(NO3)2 solution is mixed with 15 mL of 0.2 M KI solution. The maximum number of moles of PbI2 that can be precipitated is
Answer» $35 m L$ of $1.5 M P b (N O_{3})_{2}$ solution is mixed with $15 m L$ of $0.2 M K I$ solution. The maximum number of moles of $P b I_{2}$ that can be precipitated is

Discussion

25.	Pz bonding molecular orbital node
Answer» Pz bonding molecular orbital node

Discussion

26.	The maximum amount of BaSO4 (in terms ofmoles) precipitated on mixing equal volumes one litre each of BaCl2(0.5M) with H2SO4 (1 M) willcorrespond to
Answer» The maximum amount of BaSO4 (in terms ofmoles) precipitated on mixing equal volumes one litre each of BaCl2(0.5M) with H2SO4 (1 M) willcorrespond to

Discussion

27.	In the following reaction, the major compound Y is:
Answer» In the following reaction, the major compound Y is:

Discussion

28.	The percentage composition of Mohr's salt is as follows.Fe²+=14.32%NH4=9.20%SO4²‐=49%REST being water of crystallization.Find the empirical formula of Mohr's salt.
Answer» The percentage composition of Mohr's salt is as follows. Fe²+=14.32% NH4=9.20% SO4²‐=49% REST being water of crystallization.Find the empirical formula of Mohr's salt.

Discussion

29.	An element crystallises in FCC lattice and edge length of unit cell is 0.559nm. the density of unit cell is 3.19gm /cm^3.find atomic wt. of element.
Answer» An element crystallises in FCC lattice and edge length of unit cell is 0.559nm. the density of unit cell is 3.19gm /cm^3.find atomic wt. of element.

Discussion

30.	Which of the following molecules have (2R. 3-Z) configuration?
Answer» Which of the following molecules have (2R. 3-Z) configuration?

Discussion

31.	Why is the work done by gas when it expands negative? Work done is pressure * change in volume. Since final volume is larger than initial volume, it should be positive na?
Answer» Why is the work done by gas when it expands negative? Work done is pressure * change in volume. Since final volume is larger than initial volume, it should be positive na?

Discussion

32.	What is the empirical formula of vanadium oxide, if 2.74 g of the metal oxide contains 1.53 g of metal ?(Molar Mass of Vanadium = 52 g)
Answer» What is the empirical formula of vanadium oxide, if $2.74 g$ of the metal oxide contains $1.53 g$ of metal ? (Molar Mass of Vanadium = $52 g$ )

Discussion

33.	Platinum dissolves in Aquaregia to form
Answer» Platinum dissolves in Aquaregia to form

Discussion

34.	Reduction potential of a hydrogen electrode by keeping pressure of H_2 as 1 bar (at 298K) at pH 10 a. -0.592V b. 0.342V c. 0.592V d. 10
Answer» Reduction potential of a hydrogen electrode by keeping pressure of H_2 as 1 bar (at 298K) at pH 10 a. -0.592V b. 0.342V c. 0.592V d. 10

Discussion

35.	The correct order in which oxygen-oxygen bond dissociation energy increases is
Answer» The correct order in which oxygen-oxygen bond dissociation energy increases is

Discussion

36.	The compound which has only primary and tertiary carbons are
Answer» The compound which has only primary and tertiary carbons are

Discussion

37.	An ideal solution was obtained by mixinand ethanol. If the partial vapour pressuremethanol and ethanol are 2.619 kPa and 4.556kPa respectively, the composition of vapour (in terms of mole fraction) will be (1) 0.635 MeOH, 0.365 EtOH (2) 0.365 MeOH, 0.635 EtoH (3) 0.574 MeOH, 0.326 EtOH (4) 0.173 MeOH, 0.827 EtoHof
Answer» An ideal solution was obtained by mixinand ethanol. If the partial vapour pressuremethanol and ethanol are 2.619 kPa and 4.556kPa respectively, the composition of vapour (in terms of mole fraction) will be (1) 0.635 MeOH, 0.365 EtOH (2) 0.365 MeOH, 0.635 EtoH (3) 0.574 MeOH, 0.326 EtOH (4) 0.173 MeOH, 0.827 EtoHof

Discussion

38.	The general electronic configuration of halogens is?
Answer» The general electronic configuration of halogens is?

Discussion

39.	What is oxidation number of each S atom in S4O62-?
Answer» What is oxidation number of each S atom in S4O62-?

Discussion

40.	What is delocalisation
Answer» What is delocalisation

Discussion

41.	In a closed insulated container a liquid is stirred with a paddle to increase the temperature, which of the following is true?
Answer» In a closed insulated container a liquid is stirred with a paddle to increase the temperature, which of the following is true?

Discussion

42.	Is alternate face center same as end centered?
Answer» Is alternate face center same as end centered?

Discussion

43.	If 0.2molar ,100ml hcl solution mixed with 0.1molar , 300ml hcl solution find molarity of mixture
Answer» If 0.2molar ,100ml hcl solution mixed with 0.1molar , 300ml hcl solution find molarity of mixture

Discussion

44.	The compound having most basic nitrogen is:
Answer» The compound having most basic nitrogen is:

Discussion

45.	What product formed on oxidation of 2,5-dimethylhexan-3-one
Answer» What product formed on oxidation of 2,5-dimethylhexan-3-one

Discussion

46.	9. Find pH of C6H5ONa whose Ka is 10 power minus 10 and concentration is 0.1M ??
Answer» 9. Find pH of C6H5ONa whose Ka is 10 power minus 10 and concentration is 0.1M ??

Discussion

47.	In the periodic table it has been divide on the basis of subshells are these subshells are a mere speculation are have proved them if so how ??
Answer» In the periodic table it has been divide on the basis of subshells are these subshells are a mere speculation are have proved them if so how ??

Discussion

48.	How to find valency of metal and non metal from group 3 to 11
Answer» How to find valency of metal and non metal from group 3 to 11

Discussion

49.	The value of Ereduction of a hydrogen electrode at pH=0 and 298 K, 1 atm is:
Answer» The value of $E_{r e d u c t i o n}$ of a hydrogen electrode at $p H = 0$ and $298 K$ , $1 a t m$ is:

Discussion

50.	Consider the salt AgCN present in acidic medium having H+ concentration equal to c M. If s is the solubility of AgCN, Ka is the acid dissociation constant of HCN and Ksp is the solubility product of AgCN. Find the value of Ksp(Ka)HCN Assume (Ka)HCN to have a fairly low value.
Answer» Consider the salt $A g C N$ present in acidic medium having $H^{+}$ concentration equal to $c M$ . If $s$ is the solubility of $A g C N$ , $K_{a}$ is the acid dissociation constant of $H C N$ and $K_{s p}$ is the solubility product of $A g C N$ . Find the value of $\frac{K_{s p}}{(K_{a})_{H C N}}$ Assume $(K_{a})_{H C N}$ to have a fairly low value.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The following reaction is made to reach equilibrium.3H2 + N2 gives 2NH3What will be the effect of equilibrium if the volume of the vessel is decreased?

the standard heat of formation at 298K for CCl4(g) , H2O(g) , CO2(g) and HCl(g) are -25.5 , -57.8 , -94.1 and -22.1 cal/mol respectively , calculate ΔrH of reaction , CCl4(g) + 2H2O(g) →CO2(g) + 4HCl(g)

What are the different day to day practical phenomenons that we can observe due to the following :-1) Interference of light [Like- Color rings in Oil drop etc]2) Diffraction of light?3) Scattering of light?

How many moles of acetic acid should be addedto 100 ml of 0.6 M formic acid solution such thatthe percentage dissociation of formic acid remainsunchanged? The value of Ka for acetic acid = 1.8 ×10−5 and Ka for formic acid = 2.4 × 10−4.

depression in freezing point of 0.01 molal aq CH3COOH soln is 0.0204 C . 1 molal urea soln freezes at -1.86 C . assuming molality =MOLARITY , pH of CH3COOH sol is 2 3 3.2 4.2

How number of electron determines the chemical property of element?

CO2 will be considered as a polar molecule or non polar molecule??

{ †ext { Consider the following reaction: } } { aC _ { 0 } H _ { 6 } + bO _ { 2 } → CCO _ { 2 } + dH _ { 2 } O } { †ext { On balancing, the ratio } b : c †ext { is }

16. x moles of potassium dichromate oxidises 1 mol of ferrous oxalate in acidic medium here x is.

Find the work done when 2 moles of hydrogen expands isothermally from 15 L to 50 L against a constant pressure of 1 atm at 250C.

What is precision ? Can precise and accurate value be same in any case ?

Silicon dioxide made up of silicon and oxygen contains 46.7% by mass of silicon. With what mass of oxygen will 10g of silicon combine

A cyclic process is shown in the given P−T digram of an ideal gas. Which of the following curves shows the same process in P−V diagram:

The intermetallic compound LiAg crystallizes in cubic lattice in which both lithium and silver have coordination number of eight.The crystal class is 1) Face-centered cube 2) Simple cube 3) Body--centered cube 4) None of these

Taj Mahal marble is affected by

Which of the following compounds will give a significant amount of meta-product during mono - nitration reaction?

A weak base BOH is titrated with a strong acid HA. When 10 ml of HA is added, pH is found to be 9.00 and when 25 ml is added, pH is 8.00. The volume of the acid required to reach the equivalence point is (a) 35 mL (b) 40 mL (c) 30 mL (d) 50 mL.

Give the correct order of T or F for following statements. If the statement is correct then Use T and F if it is false.1.HF boils at a higher temperature than HCl2. HBr boils at lower temperature than HI3. Bond length of N2 is less than N+24. F2 has higher boiling point than Cl2

3o2_____>2o3 is formed and enthalpy change is 286kj Find enthalpy change in formation of o3

compound A (C6H8) which is optically active ,react with excess H2 in Pd to give C6H14 which is resolvable compound.how many moles of H2 molecules are required for the hydrogenation of compound A?

Calculate the percentage of p − character of the orbitals of ‘B′ atom involved in bonding with H-atom in BH3 molecule.

The heats of combustion of carbon and carbon monoxide are −283.5 and −283.5 kJ mol−1 respectively. The heat of formation (in kJ) of carbon monoxide per mole is

35 mL of 1.5 M Pb(NO3)2 solution is mixed with 15 mL of 0.2 M KI solution. The maximum number of moles of PbI2 that can be precipitated is

Pz bonding molecular orbital node

The maximum amount of BaSO4 (in terms ofmoles) precipitated on mixing equal volumes one litre each of BaCl2(0.5M) with H2SO4 (1 M) willcorrespond to

In the following reaction, the major compound Y is:

The percentage composition of Mohr's salt is as follows.Fe²+=14.32%NH4=9.20%SO4²‐=49%REST being water of crystallization.Find the empirical formula of Mohr's salt.

An element crystallises in FCC lattice and edge length of unit cell is 0.559nm. the density of unit cell is 3.19gm /cm^3.find atomic wt. of element.

Which of the following molecules have (2R. 3-Z) configuration?

Why is the work done by gas when it expands negative? Work done is pressure * change in volume. Since final volume is larger than initial volume, it should be positive na?

What is the empirical formula of vanadium oxide, if 2.74 g of the metal oxide contains 1.53 g of metal ?(Molar Mass of Vanadium = 52 g)

Platinum dissolves in Aquaregia to form

Reduction potential of a hydrogen electrode by keeping pressure of H_2 as 1 bar (at 298K) at pH 10 a. -0.592V b. 0.342V c. 0.592V d. 10

The correct order in which oxygen-oxygen bond dissociation energy increases is

The compound which has only primary and tertiary carbons are

The general electronic configuration of halogens is?

What is oxidation number of each S atom in S4O62-?

What is delocalisation

In a closed insulated container a liquid is stirred with a paddle to increase the temperature, which of the following is true?

Is alternate face center same as end centered?

If 0.2molar ,100ml hcl solution mixed with 0.1molar , 300ml hcl solution find molarity of mixture

The compound having most basic nitrogen is:

What product formed on oxidation of 2,5-dimethylhexan-3-one

9. Find pH of C6H5ONa whose Ka is 10 power minus 10 and concentration is 0.1M ??

In the periodic table it has been divide on the basis of subshells are these subshells are a mere speculation are have proved them if so how ??

How to find valency of metal and non metal from group 3 to 11

The value of Ereduction of a hydrogen electrode at pH=0 and 298 K, 1 atm is:

Consider the salt AgCN present in acidic medium having H+ concentration equal to c M. If s is the solubility of AgCN, Ka is the acid dissociation constant of HCN and Ksp is the solubility product of AgCN. Find the value of Ksp(Ka)HCN Assume (Ka)HCN to have a fairly low value.