46295 + Interview Questions in Chemistry Page 9 InterviewSolution

401.	Silver benzene will react with bromine in acetone to form
Answer» Silver benzene will react with bromine in acetone to form

Discussion

402.	The effective atomic number of cobalt in the complex [Co(NH3)6]3+is :
Answer» The effective atomic number of cobalt in the complex $[C o (N H_{3})_{6}]^{3 +} is :$

Discussion

403.	What is the difference between Bayer's law and biogenetic law of Ernst haeckal
Answer» What is the difference between Bayer's law and biogenetic law of Ernst haeckal

Discussion

404.	what is meant by interial frame of reference and non interial frame of reference ?
Answer» what is meant by interial frame of reference and non interial frame of reference ?

Discussion

405.	cos 2a + cos 2b + cos 2c = -1 + k cos a cos b cos c. Find the value of k.
Answer» cos 2a + cos 2b + cos 2c = -1 + k cos a cos b cos c. Find the value of k.

Discussion

406.	How to calculate oxidation number of two unknown atoms in a compound?For e.g. I dont know oxidation no of Carbon and Iron atom in FeC2O4. How to calculate now?
Answer» How to calculate oxidation number of two unknown atoms in a compound? For e.g. I dont know oxidation no of Carbon and Iron atom in FeC2O4. How to calculate now?

Discussion

407.	What is Caliche?
Answer» What is Caliche?

Discussion

408.	For the reaction, N2O4(g)→2NO2(g), the correct option is:
Answer» For the reaction, $N_{2} O_{4} (g) \to 2 N O_{2} (g),$ the correct option is:

Discussion

409.	Show that the circumference of the Bohr orbit for the hydrogen atom is an integral multiple of the de Broglie wavelength associated with the electron revolving around the orbit.
Answer» Show that the circumference of the Bohr orbit for the hydrogen atom is an integral multiple of the de Broglie wavelength associated with the electron revolving around the orbit.

Discussion

410.	.1 M Hcl V=200ml and .2M NaOH V=100ml neutralise together .temperature of water increases in above process is specific heat of H20 is 4.2J/gK and density of H20 is 1g/ml.
Answer» .1 M Hcl V=200ml and .2M NaOH V=100ml neutralise together .temperature of water increases in above process is specific heat of H20 is 4.2J/gK and density of H20 is 1g/ml.

Discussion

411.	What is the relation between pressure and solubility of a substance according to Henry's law
Answer» What is the relation between pressure and solubility of a substance according to Henry's law

Discussion

412.	Enthalpy of vaporization for water is 186.5kJ mol-1. The entropy change during vaporization is ........kJK-1mol-1
Answer» Enthalpy of vaporization for water is 186.5 kJ mol^-1. The entropy change during vaporization is ........ kJK^-1mol^-1

412.

Enthalpy of vaporization for water is 186.5kJ mol-1. The entropy change during vaporization is ........kJK-1mol-1

Answer»

Enthalpy of vaporization for water is 186.5
kJ mol^-1.

The entropy change during vaporization is ........
kJK^-1mol^-1

Discussion

413.	Is keto show metamerism
Answer» Is keto show metamerism

Discussion

414.	How to FInd the pH of any substance? with log formula?
Answer» How to FInd the pH of any substance? with log formula?

Discussion

415.	Find out the number of alcohols that can give positive idoform test ___
Answer» Find out the number of alcohols that can give positive idoform test ___

Discussion

416.	48. Lewis dot structure of N2O. And formal charge on each atom.
Answer» 48. Lewis dot structure of N2O. And formal charge on each atom.

Discussion

417.	For the formation of distinct beats, the frequencies of two sources of sound should be
Answer» For the formation of distinct beats, the frequencies of two sources of sound should be

Discussion

418.	COMPLETE THE REACTION CH3NH2 + CH3COOH ------->
Answer» COMPLETE THE REACTION CH3NH2 + CH3COOH ------->

Discussion

419.	34. Acetone is treated with excess of ethanol in the presence of hydrochloric acid. The product is
Answer» 34. Acetone is treated with excess of ethanol in the presence of hydrochloric acid. The product is

Discussion

420.	After adding no – volatile solute freezing point of water decreases to −0.186∘C. Calculate ΔTb if Kf=1.86 K kg mol−1 and Kb = 0.521 K kg mol−1
Answer» After adding no – volatile solute freezing point of water decreases to $- {0.186}^{\circ} C$ . Calculate $Δ T_{b}$ if $K_{f}$ =1.86 K kg $m o l^{- 1}$ and $K_{b}$ = 0.521 K kg $m o l^{- 1}$

Discussion

421.	What is the equation for work done in isothermal and adiabatic process
Answer» What is the equation for work done in isothermal and adiabatic process

Discussion

422.	A non metal A which is the largest constituent of air , when heated with H2 in 1:3 ratio in the pesence of a catalyst (Fe)gives a gas B .on heating with O2,ot gives an oxide C.if this oxide is passed into water in the presence of air, it gives an acid D which acts as a strong oxidising agent .identify A,B,C,D.
Answer» A non metal A which is the largest constituent of air , when heated with H2 in 1:3 ratio in the pesence of a catalyst (Fe)gives a gas B .on heating with O2,ot gives an oxide C.if this oxide is passed into water in the presence of air, it gives an acid D which acts as a strong oxidising agent .identify A,B,C,D.

Discussion

423.	In ethanol, the bond that undergoes heterolytic cleavage most readily is:
Answer» In ethanol, the bond that undergoes heterolytic cleavage most readily is:

Discussion

424.	how to find anti\log ?
Answer» how to find anti\log ?

Discussion

425.	In Antartica ,ozone depletion is due to formation of the following compound : a)acrolein b)PAN c)SO2 and SO3 d)chlorine nitrate
Answer» In Antartica ,ozone depletion is due to formation of the following compound : a)acrolein b)PAN c)SO2 and SO3 d)chlorine nitrate

Discussion

426.	The average S−F bond energy in kJ mol−1 of SF6 is _____.(Rounded off to the nearest integer[Given : The values of standard enthalpy of formation of SF6(g), S(g)andF(g) are - 1100, 275 and 80 kJ mol−1 respectively]
Answer» The average $S - F$ bond energy in $k J m o l^{- 1}$ of $S F_{6}$ is _____.(Rounded off to the nearest integer [Given : The values of standard enthalpy of formation of $S F_{6} (g), S (g) a n d F (g)$ are - 1100, 275 and 80 kJ $m o l^{- 1}$ respectively]

Discussion

427.	What is precision
Answer» What is precision

Discussion

428.	A sea water sample contains 7×10−3 g of dissolved oxygen per kilogram. Calculate the concentration of oxygen in ppb?
Answer» A sea water sample contains $7 \times 10^{- 3} g$ of dissolved oxygen per kilogram. Calculate the concentration of oxygen in $ppb$ ?

Discussion

429.	26. 40 milligram diatomic volatile substance (X2) is converted to vapour that displaced 4.92 mL of air at 1 atm and 300 K. Atomic weight of element X is nearly :- (1) 400 (2) 240 (3) 200 (4) 100
Answer» 26. 40 milligram diatomic volatile substance (X2) is converted to vapour that displaced 4.92 mL of air at 1 atm and 300 K. Atomic weight of element X is nearly :- (1) 400 (2) 240 (3) 200 (4) 100

Discussion

430.	Which of the following is dihydric alcohol?
Answer» Which of the following is dihydric alcohol?

Discussion

431.	Graphite cannot be classified as
Answer» Graphite cannot be classified as

Discussion

432.	Fluorine reacts with ice and results in the change: H2O(s)+F2(g)→HF(g)+HOF(g) Justify that this reaction is a redox reaction.
Answer» Fluorine reacts with ice and results in the change: $H_{2} O (s) + F_{2} (g) \to H F (g) + H O F (g)$ Justify that this reaction is a redox reaction.

Discussion

433.	dimer of Acetic acid in liquid benzene is in equilibrium with Acetic Acid monomer at certain temperature and pressure . if 25% of the dimer molecules are separated out then average molar mass will
Answer» dimer of Acetic acid in liquid benzene is in equilibrium with Acetic Acid monomer at certain temperature and pressure . if 25% of the dimer molecules are separated out then average molar mass will

Discussion

434.	14. Three atoms A, B, C, crystallizes in a cubic solid lattice where A atoms are present at the body centre, B atoms are present at the edge centres as well as the corners of the cube and C atoms are present at the face centres of the cube .Now if all the atoms are removed from the two 4-fold axis and the one two fold axis passing through the cube then what is the formula of the compound?
Answer» 14. Three atoms A, B, C, crystallizes in a cubic solid lattice where A atoms are present at the body centre, B atoms are present at the edge centres as well as the corners of the cube and C atoms are present at the face centres of the cube .Now if all the atoms are removed from the two 4-fold axis and the one two fold axis passing through the cube then what is the formula of the compound?

Discussion

435.	How many liters of air (air is 21% oxygen) are required for the combustion of 6.75 L of CH4? (Assume air and CH4 are at the same T and P)
Answer» How many liters of air (air is 21% oxygen) are required for the combustion of 6.75 L of CH₄? (Assume air and CH₄ are at the same T and P)

Discussion

436.	How structures for F are possible?
Answer» How structures for F are possible?

Discussion

437.	In a saturated solution of the sparingly soluble strong electrolyte AgIO3 (Molecular mass = 283) the equilibrium which sets in is AgIO3(s)⇌Ag+(aq)+IO−3(aq).If the solubility product constant Ksp of AgIO3 at a given temperature is 1.0×10−8, what is the mass of AgIO3 contained in 100 mL of its saturated solution?
Answer» In a saturated solution of the sparingly soluble strong electrolyte $A g I O_{3}$ (Molecular mass = 283) the equilibrium which sets in is $A g I O_{3 (s)} ⇌ A g_{(a q)}^{+} + I O_{3}^{-} (a q)$ . If the solubility product constant $K_{s p}$ of $A g I O_{3}$ at a given temperature is $1.0 \times 10^{- 8},$ what is the mass of $A g I O_{3}$ contained in 100 mL of its saturated solution?

Discussion

438.	How many moles present in 5600 ml of CO2 at STP.
Answer» How many moles present in 5600 ml of CO2 at STP.

Discussion

439.	Explainthe following with an example.(i) Kolbe’s reaction.(ii) Reimer-Tiemann reaction.(iii) Williamson ether synthesis.(iv) Unsymmetrical ether.
Answer» Explain the following with an example. (i) Kolbe’s reaction. (ii) Reimer-Tiemann reaction. (iii) Williamson ether synthesis. (iv) Unsymmetrical ether.

439.

Explainthe following with an example.(i) Kolbe’s reaction.(ii) Reimer-Tiemann reaction.(iii) Williamson ether synthesis.(iv) Unsymmetrical ether.

Answer»

Explain
the following with an example.

(i)
Kolbe’s reaction.

(ii)
Reimer-Tiemann reaction.

(iii)
Williamson ether synthesis.

(iv)
Unsymmetrical ether.

Discussion

440.	in a spherical capacitor with plate radii a and b, the potential difference between the plates is V . the electric field between the plates at a radial dis†an ce r from the centre is
Answer» in a spherical capacitor with plate radii a and b, the potential difference between the plates is V . the electric field between the plates at a radial dis†an ce r from the centre is

Discussion

441.	assertion:-1-ethylene cyclopen†an e \xrightarrow{H_2O/H^+} A 1-methyl cyclohex-1-ene\xrightarrow[{2)NABH_4/OH^-}]{1)Hg(OCOCH_3)_2,H_2O} B major product A and B are same reason:-both the reaction involves rearrangement of carbocation intermediate
Answer» assertion:-1-ethylene cyclopen†an e \xrightarrow{H_2O/H^+} A 1-methyl cyclohex-1-ene\xrightarrow[{2)NABH_4/OH^-}]{1)Hg(OCOCH_3)_2,H_2O} B major product A and B are same reason:-both the reaction involves rearrangement of carbocation intermediate

Discussion

442.	Comment saluer?
Answer» Comment saluer?

Discussion

443.	3 Differences between dendron and dendrites
Answer» 3 Differences between dendron and dendrites

Discussion

444.	Assuming that Ba(OH)2 is completely ionised in aqueous solution under the given conditions the concentration of H3O+ ions in 0.005 M acqueous solution of Ba(OH)2at298K is ______ ×10−12molL−1. (Nearest integer)
Answer» Assuming that $B a (O H)_{2}$ is completely ionised in aqueous solution under the given conditions the concentration of $H_{3} O^{+}$ ions in 0.005 M acqueous solution of $B a {(O H)}_{2} a t 298 K$ is ______ $\times 10^{- 12} m o l L^{- 1}$ . (Nearest integer)

Discussion

445.	The coefficient of restitution e for a perfectly elastic collision is
Answer» The coefficient of restitution e for a perfectly elastic collision is

Discussion

446.	What is the difference between dissolution and solvation?
Answer» What is the difference between dissolution and solvation?

Discussion

447.	The total number of non-bonded electrons present in cyanamide ion is:
Answer» The total number of non-bonded electrons present in cyanamide ion is:

Discussion

448.	78. Equal moles of H2O and NaCl are present in a solution. Hence, molarity of NaCl solution is? (1) 0.55 (2) 5.55 (3) 1.00 (4) 0.18
Answer» 78. Equal moles of H2O and NaCl are present in a solution. Hence, molarity of NaCl solution is? (1) 0.55 (2) 5.55 (3) 1.00 (4) 0.18

Discussion

449.	1)The value of Kp for the reactionCO2 +C 2CO is 3 at 1000 K. If initially pCO2=0.48 bar and pCO=0bar and pure graphite is present, calculate the equilibrium partial pressure of CO and CO2.2) The ionization constant of HF is 3.2*10^(-4). Calculate the degree of dissociation of HF in its 0.02M solution. Calculate the concentration of all species present (H30+, F, HF) in the solution and its pH. Do we have to multiply the initial concentration of the reactant to the degree of dissociation of equilibrium concentration of reactant and product?
Answer» 1)The value of Kp for the reaction CO2 +C <=> 2CO is 3 at 1000 K. If initially pCO2=0.48 bar and pCO=0bar and pure graphite is present, calculate the equilibrium partial pressure of CO and CO2. 2) The ionization constant of HF is 3.2*10^(-4). Calculate the degree of dissociation of HF in its 0.02M solution. Calculate the concentration of all species present (H30+, F, HF) in the solution and its pH. Do we have to multiply the initial concentration of the reactant to the degree of dissociation of equilibrium concentration of reactant and product?

Discussion

450.	The conversion of phenyl methyl ketone to ethylbenzene in one step is brought about by which reagent?
Answer» The conversion of phenyl methyl ketone to ethylbenzene in one step is brought about by which reagent?

Discussion

Explore topic-wise InterviewSolutions in .

Silver benzene will react with bromine in acetone to form

The effective atomic number of cobalt in the complex [Co(NH3)6]3+is :

What is the difference between Bayer's law and biogenetic law of Ernst haeckal

what is meant by interial frame of reference and non interial frame of reference ?

cos 2a + cos 2b + cos 2c = -1 + k cos a cos b cos c. Find the value of k.

How to calculate oxidation number of two unknown atoms in a compound?For e.g. I dont know oxidation no of Carbon and Iron atom in FeC2O4. How to calculate now?

What is Caliche?

For the reaction, N2O4(g)→2NO2(g), the correct option is:

Show that the circumference of the Bohr orbit for the hydrogen atom is an integral multiple of the de Broglie wavelength associated with the electron revolving around the orbit.

.1 M Hcl V=200ml and .2M NaOH V=100ml neutralise together .temperature of water increases in above process is specific heat of H20 is 4.2J/gK and density of H20 is 1g/ml.

What is the relation between pressure and solubility of a substance according to Henry's law

Enthalpy of vaporization for water is 186.5kJ mol-1. The entropy change during vaporization is ........kJK-1mol-1

Is keto show metamerism

How to FInd the pH of any substance? with log formula?

Find out the number of alcohols that can give positive idoform test ___

48. Lewis dot structure of N2O. And formal charge on each atom.

For the formation of distinct beats, the frequencies of two sources of sound should be

COMPLETE THE REACTION CH3NH2 + CH3COOH ------->

34. Acetone is treated with excess of ethanol in the presence of hydrochloric acid. The product is

After adding no – volatile solute freezing point of water decreases to −0.186∘C. Calculate ΔTb if Kf=1.86 K kg mol−1 and Kb = 0.521 K kg mol−1

What is the equation for work done in isothermal and adiabatic process

In ethanol, the bond that undergoes heterolytic cleavage most readily is:

how to find anti\log ?

In Antartica ,ozone depletion is due to formation of the following compound : a)acrolein b)PAN c)SO2 and SO3 d)chlorine nitrate

The average S−F bond energy in kJ mol−1 of SF6 is _____.(Rounded off to the nearest integer[Given : The values of standard enthalpy of formation of SF6(g), S(g)andF(g) are - 1100, 275 and 80 kJ mol−1 respectively]

What is precision

A sea water sample contains 7×10−3 g of dissolved oxygen per kilogram. Calculate the concentration of oxygen in ppb?

26. 40 milligram diatomic volatile substance (X2) is converted to vapour that displaced 4.92 mL of air at 1 atm and 300 K. Atomic weight of element X is nearly :- (1) 400 (2) 240 (3) 200 (4) 100

Which of the following is dihydric alcohol?

Graphite cannot be classified as

Fluorine reacts with ice and results in the change: H2O(s)+F2(g)→HF(g)+HOF(g) Justify that this reaction is a redox reaction.

dimer of Acetic acid in liquid benzene is in equilibrium with Acetic Acid monomer at certain temperature and pressure . if 25% of the dimer molecules are separated out then average molar mass will

How many liters of air (air is 21% oxygen) are required for the combustion of 6.75 L of CH4? (Assume air and CH4 are at the same T and P)

How structures for F are possible?

How many moles present in 5600 ml of CO2 at STP.

Explainthe following with an example.(i) Kolbe’s reaction.(ii) Reimer-Tiemann reaction.(iii) Williamson ether synthesis.(iv) Unsymmetrical ether.

in a spherical capacitor with plate radii a and b, the potential difference between the plates is V . the electric field between the plates at a radial dis†an ce r from the centre is

assertion:-1-ethylene cyclopen†an e \xrightarrow{H_2O/H^+} A 1-methyl cyclohex-1-ene\xrightarrow[{2)NABH_4/OH^-}]{1)Hg(OCOCH_3)_2,H_2O} B major product A and B are same reason:-both the reaction involves rearrangement of carbocation intermediate

Comment saluer?

3 Differences between dendron and dendrites

Assuming that Ba(OH)2 is completely ionised in aqueous solution under the given conditions the concentration of H3O+ ions in 0.005 M acqueous solution of Ba(OH)2at298K is ______ ×10−12molL−1. (Nearest integer)

The coefficient of restitution e for a perfectly elastic collision is

What is the difference between dissolution and solvation?

The total number of non-bonded electrons present in cyanamide ion is:

78. Equal moles of H2O and NaCl are present in a solution. Hence, molarity of NaCl solution is? (1) 0.55 (2) 5.55 (3) 1.00 (4) 0.18

The conversion of phenyl methyl ketone to ethylbenzene in one step is brought about by which reagent?