46295 + Interview Questions in Chemistry

1.	At constant pressure (∆P=0) Than, Enthalpy ∆H=∆U+∆(PV) ∆H=∆U+P∆V+V∆P; But as (∆P=0) ∆H=∆U+P∆V But if the Volume is constant (∆V=0) Than the equation becomes ∆H=∆U+V∆P What does this Equation implies and what is it's application?
Answer» At constant pressure (∆P=0) Than, Enthalpy ∆H=∆U+∆(PV) ∆H=∆U+P∆V+V∆P; But as (∆P=0) ∆H=∆U+P∆V But if the Volume is constant (∆V=0) Than the equation becomes ∆H=∆U+V∆P What does this Equation implies and what is it's application?

1.

At constant pressure (∆P=0) Than, Enthalpy ∆H=∆U+∆(PV) ∆H=∆U+P∆V+V∆P; But as (∆P=0) ∆H=∆U+P∆V But if the Volume is constant (∆V=0) Than the equation becomes ∆H=∆U+V∆P What does this Equation implies and what is it's application?

Answer»

At constant pressure (∆P=0)

Than, Enthalpy

∆H=∆U+∆(PV)

∆H=∆U+P∆V+V∆P; But as (∆P=0)

∆H=∆U+P∆V

But if the Volume is constant (∆V=0)

Than the equation becomes

∆H=∆U+V∆P

What does this Equation implies and what is it's application?

Discussion

2.	The boiling point of water (100°C) becomes 100.52°C, if 3 grams of a non-volatile solute is dissolved in 200ml of water. The molecular weight of solute is
Answer» The boiling point of water (100°C) becomes 100.52°C, if 3 grams of a non-volatile solute is dissolved in 200ml of water. The molecular weight of solute is

2.

The boiling point of water (100°C) becomes 100.52°C, if 3 grams of a non-volatile solute is dissolved in 200ml of water. The molecular weight of solute is

Answer»

The boiling point of water (100°C) becomes 100.52°C, if 3 grams of a non-volatile solute is dissolved in 200ml of water. The molecular weight of

solute is

Discussion

3.	Consider 8.2 L of an ideal gas of weight 9.0 gm and at 300 K temperature and 1 atm pressure. What is the molecular mass of gas?
Answer» Consider 8.2 L of an ideal gas of weight 9.0 gm and at 300 K temperature and 1 atm pressure. What is the molecular mass of gas?

Discussion

4.	A straight glass tube as shown has 2 inlets X and Y at the two ends of 200 cm long tube. HCl gas through inlet X and NH3 gas through inlet Y are allowd to enter in the tube at the same time and under the identical conditions. At a point P inside the tube both the gases meet first. The distance of point P from X is:
Answer» A straight glass tube as shown has 2 inlets $X$ and $Y$ at the two ends of $200 cm$ long tube. $H C l$ gas through inlet $X$ and $N H_{3}$ gas through inlet $Y$ are allowd to enter in the tube at the same time and under the identical conditions. At a point $P$ inside the tube both the gases meet first. The distance of point $P$ from $X$ is:

Discussion

5.	Highly pure solution of sodium in liquid ammonia Shows blue colour Exhibits electrical conductivity Produces hydrogen gas Produces sodium anide
Answer» Highly pure solution of sodium in liquid ammonia Shows blue colour Exhibits electrical conductivity Produces hydrogen gas Produces sodium anide

Discussion

6.	3 – hydroxyl butanal is formed when X reacts with Y in dilute Z solution. What are X, Y & Z?
Answer» 3 – hydroxyl butanal is formed when X reacts with Y in dilute Z solution. What are X, Y & Z?

Discussion

7.	Among the following, reaction(s) which give(s) tert-butyl benzene as the major product is/are:
Answer» Among the following, reaction(s) which give(s) tert-butyl benzene as the major product is/are:

Discussion

8.	Products of reactions are CH3C=CCH2CH3KMnO4.KOH373−383K
Answer» Products of reactions are $C H_{3} C = C C H_{2} C H_{3} \frac{K M n O_{4} . K O H}{373 - 383 K}$

Discussion

9.	One g of a mixture of Na2CO3 and NaHCO3 consumes y equivalent of HCl for complete neutralization. One g of the mixture is strongly heated, then cooled and the residue treated with HCl. How many equivalent of HCl would be required for complete neutralization?
Answer» One g of a mixture of Na₂CO₃ and NaHCO₃ consumes y equivalent of HCl for complete neutralization. One g of the mixture is strongly heated, then cooled and the residue treated with HCl. How many equivalent of HCl would be required for complete neutralization?

Discussion

10.	The activation energy of a reaction can be determined from the slope of which of the following graphs ?
Answer» The activation energy of a reaction can be determined from the slope of which of the following graphs ?

Discussion

11.	Assertion (A) Phenol forms 2, 4, 6-tribromophenol on treatment with Br2 in carbon disulphide at 273K. Reason (R) Bromine polarises in carbon disulphide. (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) Phenol forms 2, 4, 6-tribromophenol on treatment with $B r_{2}$ in carbon disulphide at 273K. Reason (R) Bromine polarises in carbon disulphide. (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

12.	Ethers can be prepared by Williamson synthesis in which an alkyl halide is reacted with sodium alkoxide. Di-tert -butyl ether can't be prepared by this method.Explain.
Answer» Ethers can be prepared by Williamson synthesis in which an alkyl halide is reacted with sodium alkoxide. Di-tert -butyl ether can't be prepared by this method.Explain.

Discussion

13.	For the reduction of NO−3 ion in an aqueous solution E0 is + 0.96 V. Values of E0 for some metal ions are given below V2+(aq)+2e−→V; E0=−1.19VFe3+(aq)+3e−→Fe; E0=−0.04VAu3+(aq)+3e−→Au; E0=−1.40VHg2+(aq)+2e−→Hg; E0=−0.86V The pair (s) of metals that is/ are oxidized by NO−3 in aqueous solution is (are)
Answer» For the reduction of $N O_{3}^{-}$ ion in an aqueous solution $E^{0}$ is + 0.96 V. Values of $E^{0}$ for some metal ions are given below $V^{2 +} (a q) + 2 e^{-} \to V; E^{0} = - 1.19 V F e^{3 +} (a q) + 3 e^{-} \to F e; E^{0} = - 0.04 V A u^{3 +} (a q) + 3 e^{-} \to A u; E^{0} = - 1.40 V H g^{2 +} (a q) + 2 e^{-} \to H g; E^{0} = - 0.86 V$ The pair (s) of metals that is/ are oxidized by $N O_{3}^{-}$ in aqueous solution is (are)

Discussion

14.	Reduction of CH3CH2COCH3 to CH3CH2CH2CH3 can be carried out with:
Answer» Reduction of $C H_{3} C H_{2} C O C H_{3}$ to $C H_{3} C H_{2} C H_{2} C H_{3}$ can be carried out with:

Discussion

15.	You are provided with a 500 mL of hard water, containing 0.005 mole of CaCl2, and two sulphuric acid samples of 0.001 M and 0.02 M concentrations. The solubility product of calcium sulphate in water at 25∘C is 2.4 × 10−5. Choose the most appropriate answer:
Answer» You are provided with a $500 m L$ of hard water, containing $0.005 m o l e$ of $C a C l_{2}$ , and two sulphuric acid samples of $0.001 M$ and $0.02 M$ concentrations. The solubility product of calcium sulphate in water at $25^{\circ} C$ is $2.4 \times 10^{- 5}$ . Choose the most appropriate answer:

Discussion

16.	One mole of an ideal diatomic gas undergoes a transition from A to B along a path AB as shown in the ﬁgure. The change in internal energy of the gas during the transition is:
Answer» One mole of an ideal diatomic gas undergoes a transition from A to B along a path AB as shown in the ﬁgure. The change in internal energy of the gas during the transition is:

16.

One mole of an ideal diatomic gas undergoes a transition from A to B along a path AB as shown in the ﬁgure. The change in internal energy of the gas during the transition is:

Answer»

One mole of an ideal diatomic gas undergoes a transition from A to B along a path AB as shown in the ﬁgure. The change in internal energy of the gas during the transition is:

Discussion

17.	Find the de-Broglie wavelength of an electron with kinetic energy of 120 eV
Answer» Find the de-Broglie wavelength of an electron with kinetic energy of 120 eV

Discussion

18.	Ammonia is NOT produced in the reaction of
Answer» Ammonia is NOT produced in the reaction of

Discussion

19.	The random or zig-zag motion of colloidal particles in the dispersion medium is referred to as –
Answer» The random or zig-zag motion of colloidal particles in the dispersion medium is referred to as –

Discussion

20.	Volume of 0.1M K2Cr2O7 required to oxidize 35 mL of 0.5 M FeSO4 solution is:
Answer» Volume of 0.1M $K_{2} C r_{2} O_{7}$ required to oxidize 35 mL of 0.5 M FeSO4 solution is:

Discussion

21.	What is difference between physisorption and chemisorption ?
Answer» What is difference between physisorption and chemisorption ?

Discussion

22.	What makes HDPE have density and strength as compared to LDPE
Answer» What makes HDPE have density and strength as compared to LDPE

Discussion

23.	Which has least energy level in Not theory A ) non Bonding molecular orbital B) bonding molecular orbital C) anitbonding molecular orbital Plz gave answer with proper reason and concept
Answer» Which has least energy level in Not theory A ) non Bonding molecular orbital B) bonding molecular orbital C) anitbonding molecular orbital Plz gave answer with proper reason and concept

23.

Which has least energy level in Not theory A ) non Bonding molecular orbital B) bonding molecular orbital C) anitbonding molecular orbital Plz gave answer with proper reason and concept

Answer»

Which has least energy level in Not theory

A ) non Bonding molecular orbital

B) bonding molecular orbital

C) anitbonding molecular orbital

Plz gave answer with proper reason and concept

Discussion

24.	Which is more stable N2- or N2+ and why, since the bond order will be the same?
Answer» Which is more stable N2- or N2+ and why, since the bond order will be the same?

Discussion

25.	Order of [em] ratio of proton, α particle and electron is
Answer» Order of $[\frac{e}{m}]$ ratio of proton, $α$ particle and electron is

Discussion

26.	Lattice energies of BeF2, MgF2, CaF2 and BaF2 are −2906, −2610, −2459, and −2367 kJ mol−1, respectiely. Hydration energies of Be2+, Mg2+, Ca2+, Ba2+, and F− are −2494, −1921 ,−1577, −1305, and−457 kJ mol−1, respectively. Which of the flourides is not soluble in water.
Answer» Lattice energies of $B e F_{2}, M g F_{2}, C a F_{2} a n d B a F_{2}$ are $- 2906, - 2610, - 2459, a n d - 2367 k J m o l^{- 1}$ , respectiely. Hydration energies of $B e^{2 +}, M g^{2 +}, C a^{2 +}, B a^{2 +}, a n d F^{-}$ are $- 2494, - 1921, - 1577, - 1305, a n d - 457 k J m o l^{- 1}$ , respectively. Which of the flourides is not soluble in water.

Discussion

27.	From the given carbonyl compound, the one which can readily be protonated in an acidic solution undergoes bromination in the presence of CH3COOH to furnish a compound X. XNaBH4−−−−→H3O+YHI−−→Z+Alkyl halide Which of the following options is/are true?
Answer» From the given carbonyl compound, the one which can readily be protonated in an acidic solution undergoes bromination in the presence of $C H_{3} C O O H$ to furnish a compound X. $X N a B H_{4} - --- \to H_{3} O^{+} Y H I - - \to Z + Alkyl halide$ Which of the following options is/are true?

Discussion

28.	What is organic semiconductor name any two of semiconductor
Answer» What is organic semiconductor name any two of semiconductor

Discussion

29.	DOES UNSTABILITY IMPLIES HIGH REACTIVITY?
Answer» DOES UNSTABILITY IMPLIES HIGH REACTIVITY?

Discussion

30.	Which of the following have same bond order?
Answer» Which of the following have same bond order?

Discussion

31.	Which of the following reagent is preferred to prepare alkyl halides from alcohols?
Answer» Which of the following reagent is preferred to prepare alkyl halides from alcohols?

Discussion

32.	Which of the following is not caused by deficiency of mineral nutrition ?
Answer» Which of the following is not caused by deficiency of mineral nutrition ?

Discussion

33.	Manganese exhibits maximum oxidation state in
Answer» Manganese exhibits maximum oxidation state in

Discussion

34.	Among the following compounds, the most acidic is :
Answer» Among the following compounds, the most acidic is :

Discussion

35.	Weight of H2O in 1000 kg CuSO4.5H2O is x. Find x.
Answer» Weight of H2O in 1000 kg CuSO₄.5H2O is x. Find x.

Discussion

36.	The following is the property of benzene diazonium chloride:
Answer» The following is the property of benzene diazonium chloride:

Discussion

37.	1 ml of 10−5 M HCl solution is diluted to 1000 ml. Then the pH of the diluted solution is : (Kw = 10−14 and log(10.5) = 1.02) (Consider only two points after decimal.)
Answer» 1 ml of $10^{- 5}$ M HCl solution is diluted to 1000 ml. Then the pH of the diluted solution is : $(K_{w} = 10^{- 14} a n d l o g (10.5) = 1.02$ ) (Consider only two points after decimal.)

Discussion

38.	Which of the following will undergo a faster SN2?
Answer» Which of the following will undergo a faster $S_{N} 2$ ?

Discussion

39.	Polarization is an important phenomenon which is helpful in determination of covalent nature of compound. With the help of Fajan's rule one can easily predict the nature of compound. Which of the following halide possess the highest covalent character?
Answer» Polarization is an important phenomenon which is helpful in determination of covalent nature of compound. With the help of Fajan's rule one can easily predict the nature of compound. Which of the following halide possess the highest covalent character?

Discussion

40.	Methanoic acid and Ethanoic acid can be differentiated by:
Answer» Methanoic acid and Ethanoic acid can be differentiated by:

Discussion

41.	Please give the product of the reactions below:
Answer» Please give the product of the reactions below:

Discussion

42.	If, in the reaction N2O4(g)⇌2NO2(g), one mole of N2O4 taken initially and x is that part of N2O4 which dissociates, then the number of moles at equilibrium will be:
Answer» If, in the reaction $N_{2} O_{4} (g) ⇌ 2 N O_{2} (g),$ one mole of $N_{2} O_{4}$ taken initially and $x$ is that part of $N_{2} O_{4}$ which dissociates, then the number of moles at equilibrium will be:

Discussion

43.	If each orbital can hold a maximum of 3 electrons. The number of elements in 2nd period of periodic table (long form) is? Why? Please explain.
Answer» If each orbital can hold a maximum of 3 electrons. The number of elements in 2nd period of periodic table (long form) is? Why? Please explain.

Discussion

44.	State the postulates of Huygen's wave theory.
Answer» State the postulates of Huygen's wave theory.

Discussion

45.	What is half life period ?
Answer» What is half life period ?

Discussion

46.	2 m3 volume of a gas (γ=1.4) at a pressure of 4×105N/m2 is compressed adiabatically so that its volume becomes 0.5 m3. Calculate the work done in process? (Given 41.4=6.9)
Answer» $2 m^{3}$ volume of a gas ( $γ = 1.4$ ) at a pressure of $4 \times 10^{5} N / m^{2}$ is compressed adiabatically so that its volume becomes $0.5 m^{3}$ . Calculate the work done in process? (Given $4^{1.4} = 6.9$ )

Discussion

47.	I am not understanding amines which topics should be studied to understand amines completely?
Answer» I am not understanding amines which topics should be studied to understand amines completely?

Discussion

48.	As mentioned in the lecture (introduction to imperfection in solids, 1st video) the respected sir said perfect crystals are found '''rarely' and not ' they dontd exist' so does that mean are found 1 in 1000?
Answer» As mentioned in the lecture (introduction to imperfection in solids, 1st video) the respected sir said perfect crystals are found '''rarely' and not ' they dontd exist' so does that mean are found 1 in 1000?

Discussion

49.	Why do we use antacids ? Write its nature? Which product will form when CaO is dissolved in water how do u find the nature of product
Answer» Why do we use antacids ? Write its nature? Which product will form when CaO is dissolved in water how do u find the nature of product

49.

Why do we use antacids ? Write its nature? Which product will form when CaO is dissolved in water how do u find the nature of product

Answer»

Why do we use antacids ? Write its nature?

Which product will form when CaO is dissolved in water how do u find the nature of product

Discussion

50.	Calculate the emf of the following cell at 25∘C : Ag(s)\|Ag+(10−3M)\|\|Cu2+(10−1M)\|Cu(s) Given E∘cell=+0.46 V and log 10n=n.
Answer» Calculate the emf of the following cell at $25^{\circ} C$ : $A g (s) \| A g^{+} (10^{- 3} M) \| \| C u^{2 +} (10^{- 1} M) \| C u (s)$ Given $E_{c e l l}^{\circ} = + 0.46 V$ and $l o g 10^{n} = n .$

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

At constant pressure (∆P=0) Than, Enthalpy ∆H=∆U+∆(PV) ∆H=∆U+P∆V+V∆P; But as (∆P=0) ∆H=∆U+P∆V But if the Volume is constant (∆V=0) Than the equation becomes ∆H=∆U+V∆P What does this Equation implies and what is it's application?

The boiling point of water (100°C) becomes 100.52°C, if 3 grams of a non-volatile solute is dissolved in 200ml of water. The molecular weight of solute is

Consider 8.2 L of an ideal gas of weight 9.0 gm and at 300 K temperature and 1 atm pressure. What is the molecular mass of gas?

Highly pure solution of sodium in liquid ammonia Shows blue colour Exhibits electrical conductivity Produces hydrogen gas Produces sodium anide

3 – hydroxyl butanal is formed when X reacts with Y in dilute Z solution. What are X, Y &amp; Z?

Among the following, reaction(s) which give(s) tert-butyl benzene as the major product is/are:

Products of reactions are CH3C=CCH2CH3KMnO4.KOH373−383K

One g of a mixture of Na2CO3 and NaHCO3 consumes y equivalent of HCl for complete neutralization. One g of the mixture is strongly heated, then cooled and the residue treated with HCl. How many equivalent of HCl would be required for complete neutralization?

The activation energy of a reaction can be determined from the slope of which of the following graphs ?

Ethers can be prepared by Williamson synthesis in which an alkyl halide is reacted with sodium alkoxide. Di-tert -butyl ether can't be prepared by this method.Explain.

Reduction of CH3CH2COCH3 to CH3CH2CH2CH3 can be carried out with:

You are provided with a 500 mL of hard water, containing 0.005 mole of CaCl2, and two sulphuric acid samples of 0.001 M and 0.02 M concentrations. The solubility product of calcium sulphate in water at 25∘C is 2.4 × 10−5. Choose the most appropriate answer:

One mole of an ideal diatomic gas undergoes a transition from A to B along a path AB as shown in the ﬁgure. The change in internal energy of the gas during the transition is:

Find the de-Broglie wavelength of an electron with kinetic energy of 120 eV

Ammonia is NOT produced in the reaction of

The random or zig-zag motion of colloidal particles in the dispersion medium is referred to as –

Volume of 0.1M K2Cr2O7 required to oxidize 35 mL of 0.5 M FeSO4 solution is:

What is difference between physisorption and chemisorption ?

What makes HDPE have density and strength as compared to LDPE

Which has least energy level in Not theory A ) non Bonding molecular orbital B) bonding molecular orbital C) anitbonding molecular orbital Plz gave answer with proper reason and concept

Which is more stable N2- or N2+ and why, since the bond order will be the same?

Order of [em] ratio of proton, α particle and electron is

Lattice energies of BeF2, MgF2, CaF2 and BaF2 are −2906, −2610, −2459, and −2367 kJ mol−1, respectiely. Hydration energies of Be2+, Mg2+, Ca2+, Ba2+, and F− are −2494, −1921 ,−1577, −1305, and−457 kJ mol−1, respectively. Which of the flourides is not soluble in water.

From the given carbonyl compound, the one which can readily be protonated in an acidic solution undergoes bromination in the presence of CH3COOH to furnish a compound X. XNaBH4−−−−→H3O+YHI−−→Z+Alkyl halide Which of the following options is/are true?

What is organic semiconductor name any two of semiconductor

DOES UNSTABILITY IMPLIES HIGH REACTIVITY?

Which of the following have same bond order?

Which of the following reagent is preferred to prepare alkyl halides from alcohols?

Which of the following is not caused by deficiency of mineral nutrition ?

Manganese exhibits maximum oxidation state in

Among the following compounds, the most acidic is :

Weight of H2O in 1000 kg CuSO4.5H2O is x. Find x.

The following is the property of benzene diazonium chloride:

1 ml of 10−5 M HCl solution is diluted to 1000 ml. Then the pH of the diluted solution is : (Kw = 10−14 and log(10.5) = 1.02) (Consider only two points after decimal.)

Which of the following will undergo a faster SN2?

Polarization is an important phenomenon which is helpful in determination of covalent nature of compound. With the help of Fajan's rule one can easily predict the nature of compound. Which of the following halide possess the highest covalent character?

Methanoic acid and Ethanoic acid can be differentiated by:

Please give the product of the reactions below:

If, in the reaction N2O4(g)⇌2NO2(g), one mole of N2O4 taken initially and x is that part of N2O4 which dissociates, then the number of moles at equilibrium will be:

If each orbital can hold a maximum of 3 electrons. The number of elements in 2nd period of periodic table (long form) is? Why? Please explain.

State the postulates of Huygen's wave theory.

What is half life period ?

2 m3 volume of a gas (γ=1.4) at a pressure of 4×105N/m2 is compressed adiabatically so that its volume becomes 0.5 m3. Calculate the work done in process? (Given 41.4=6.9)

I am not understanding amines which topics should be studied to understand amines completely?

As mentioned in the lecture (introduction to imperfection in solids, 1st video) the respected sir said perfect crystals are found '''rarely' and not ' they dontd exist' so does that mean are found 1 in 1000?

Why do we use antacids ? Write its nature? Which product will form when CaO is dissolved in water how do u find the nature of product

Calculate the emf of the following cell at 25∘C : Ag(s)|Ag+(10−3M)||Cu2+(10−1M)|Cu(s) Given E∘cell=+0.46 V and log 10n=n.

3 – hydroxyl butanal is formed when X reacts with Y in dilute Z solution. What are X, Y & Z?