46295 + Interview Questions in Chemistry

1.	Among the following compounds which can be dehydrated very easily is
Answer» Among the following compounds which can be dehydrated very easily is

Discussion

2.	Arrange in order of increasing dipole movement. I. Toulene II. m - dichlorobenzene III. o - dichlorobenzene IV. p - dichlorobenzene
Answer» Arrange in order of increasing dipole movement. I. Toulene II. m - dichlorobenzene III. o - dichlorobenzene IV. p - dichlorobenzene

2.

Arrange in order of increasing dipole movement. I. Toulene II. m - dichlorobenzene III. o - dichlorobenzene IV. p - dichlorobenzene

Answer»

Arrange in order of increasing dipole movement.

I. Toulene

II. m - dichlorobenzene

III. o - dichlorobenzene

IV. p - dichlorobenzene

Discussion

3.	A solution which is 10−3M each in Mn2+,Fe2+ and Hg2+ is treated with 10−16 M sulphide ion, If Ksp of MnS,FeS,ZnS and HgS are 10−15,10−25,10−20 and 10−54 respectively, which one will precipitate first?
Answer» A solution which is $10^{- 3} M$ each in $M n^{2 +}, F e^{2 +}$ and $H g^{2 +}$ is treated with $10^{- 16} M$ sulphide ion, If $K_{s p}$ of $M n S, F e S, Z n S a n d H g S$ are $10^{- 15}, 10^{- 25}, 10^{- 20}$ and $10^{- 54}$ respectively, which one will precipitate first?

Discussion

4.	In the periodic table, the element with atomic number 16 will be placed in the group
Answer» In the periodic table, the element with atomic number 16 will be placed in the group

4.

In the periodic table, the element with atomic number 16 will be placed in the group

Answer»

In the periodic table, the element with atomic number 16 will be placed in the group

Discussion

5.	The oxidation number of C inCO2 is
Answer» The oxidation number of C in $C O_{2}$ is

5.

The oxidation number of C inCO2 is

Answer»

The oxidation number of C in $C O_{2}$ is

Discussion

6.	The unit cell with crystallographic dimensions, a≠b≠c,α=γ=90 and β≠90 is
Answer» The unit cell with crystallographic dimensions, $a \neq b \neq c, α = γ = 90 a n d β \neq 90$ is

Discussion

7.	A carbonyl compound P, which gives positive iodoform test, undergoes reaction with MeMgBr followed by dehydration to given an olefin Q. Ozonolysis of Q leads to a dicarbonyl compound R, which undergoes intramolecular-aldol reaction to give predominantly S. P=1.MeMgBr−−−−−−−−−−−−−−−−→2. H+,H2O3. H2SO4/heatQ2.O3/Zn−H2O−−−−−−−−−→ROH−−−−→heatS The structure of the carbonyl compound P, is
Answer» A carbonyl compound P, which gives positive iodoform test, undergoes reaction with MeMgBr followed by dehydration to given an olefin Q. Ozonolysis of Q leads to a dicarbonyl compound R, which undergoes intramolecular-aldol reaction to give predominantly S. $P = 1. M e M g B r - --------------- \to 2. H^{+}, H_{2} O 3. H_{2} S O_{4} / h e a t Q 2. O_{3} / Z n - H_{2} O - -------- \to R O H^{-} - -- \to h e a t S$ The structure of the carbonyl compound P, is

Discussion

8.	Deuterons when bombarded on a nuclide produce 18Ar38 and neutrons. The target is
Answer» Deuterons when bombarded on a nuclide produce $_{18} A r^{38}$ and neutrons. The target is

Discussion

9.	Metal posses two types of valency- Primary (ionizable) and secondary (non-ionizable) is the postulate of
Answer» Metal posses two types of valency- Primary (ionizable) and secondary (non-ionizable) is the postulate of

Discussion

10.	What is the compound (Z) in the following sequence of reaction
Answer» What is the compound (Z) in the following sequence of reaction

10.

What is the compound (Z) in the following sequence of reaction

Answer»

What is the compound (Z) in the following sequence of reaction

Discussion

11.	Assertion (A) The enthalpy of reaction remains constant in the presence of a catalyst. Reason (R) A catalyst participating in the reaction forms different activated complex and lowers down the activation energy but the difference in enrgy of reactant and product remains the same. (a) Both assertion and reason are correct and the reason is correct explanation of assertion (b) Both assertion and reason are correct, but reason does not explain assertion. (c) Assertion is correct, but reason is incorrect (d) Both assertion and reason are incorrect (e) Assertion is incorrect but reason is correct.
Answer» Assertion (A) The enthalpy of reaction remains constant in the presence of a catalyst. Reason (R) A catalyst participating in the reaction forms different activated complex and lowers down the activation energy but the difference in enrgy of reactant and product remains the same. (a) Both assertion and reason are correct and the reason is correct explanation of assertion (b) Both assertion and reason are correct, but reason does not explain assertion. (c) Assertion is correct, but reason is incorrect (d) Both assertion and reason are incorrect (e) Assertion is incorrect but reason is correct.

11.

Assertion (A) The enthalpy of reaction remains constant in the presence of a catalyst. Reason (R) A catalyst participating in the reaction forms different activated complex and lowers down the activation energy but the difference in enrgy of reactant and product remains the same. (a) Both assertion and reason are correct and the reason is correct explanation of assertion (b) Both assertion and reason are correct, but reason does not explain assertion. (c) Assertion is correct, but reason is incorrect (d) Both assertion and reason are incorrect (e) Assertion is incorrect but reason is correct.

Answer»

Assertion (A) The enthalpy of reaction remains constant in the presence of a catalyst.

Reason (R) A catalyst participating in the reaction forms different activated complex and lowers down the activation energy but the difference in enrgy of reactant and product remains the same.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

Discussion

12.	Compound which is added to soap to impart antiseptic properties is .... (a) sodium laurylsulphate (b) sodium dodecylbenzenesulphonate ( c) rosin (d) bithional
Answer» Compound which is added to soap to impart antiseptic properties is .... (a) sodium laurylsulphate (b) sodium dodecylbenzenesulphonate ( c) rosin (d) bithional

Discussion

13.	According to Lewis concept of acids and bases, ethers are
Answer» According to Lewis concept of acids and bases, ethers are

Discussion

14.	Which of the following is an example of interstitial compound?
Answer» Which of the following is an example of interstitial compound?

Discussion

15.	Which of the following will not undergo Hell- Volhard Zelinsky reaction?
Answer» Which of the following will not undergo Hell- Volhard Zelinsky reaction?

Discussion

16.	What is the volume of CO2 gas obtained on the complete combustion of 30 mL of propane gas?
Answer» What is the volume of $C O_{2}$ gas obtained on the complete combustion of $30 mL$ of propane gas?

Discussion

17.	Magnetic moment of [MnCl4]2− is 5.92 BM. Explain giving reason present.
Answer» Magnetic moment of $[M n C l_{4}]^{2 -}$ is 5.92 BM. Explain giving reason present.

Discussion

18.	An organic compound C3H6O does not give a precipitate with 2,4‑Dinitrophenyl hydrazine reagent and does not react with metallic sodium. It could be:
Answer» An organic compound C3H6O does not give a precipitate with 2,4‑Dinitrophenyl hydrazine reagent and does not react with metallic sodium. It could be:

Discussion

19.	Two equilibria are simultaneously exist in a vessel at 25 ∘C NO(g)+NO2(g)Kp1⇌N2O3(g) 2NO2(g)Kp2=8atm⇌N2O4(g) If initially only NO and NO2 are present in a 3:5 mole ratio and the total pressure at equilibrium is 5.5 atm with the pressure of NO2 at 0.5 atm, calculate Kp1.
Answer» Two equilibria are simultaneously exist in a vessel at $25^{\circ} C$ $N O (g) + N O_{2} (g)_{p 1} N_{2} O_{3} (g)$ $2 N O_{2} (g) K_{p 2} = 8 a t m ⇌ N_{2} O_{4} (g)$ If initially only NO and $N O_{2}$ are present in a 3:5 mole ratio and the total pressure at equilibrium is 5.5 atm with the pressure of $N O_{2}$ at 0.5 atm, calculate $K_{p 1}$ .

Discussion

20.	Carbinol is[RPMT 2000]
Answer» Carbinol is[RPMT 2000]

Discussion

21.	Critical temperature for carbon dioxide and methane are 31.1∘C and –81.9∘C respectively. Which of these has stronger intermolecular forces and why?
Answer» Critical temperature for carbon dioxide and methane are ${31.1}^{\circ} C$ and $- {81.9}^{\circ} C$ respectively. Which of these has stronger intermolecular forces and why?

21.

Critical temperature for carbon dioxide and methane are 31.1∘C and –81.9∘C respectively. Which of these has stronger intermolecular forces and why?

Answer»

Critical temperature for carbon dioxide and methane are ${31.1}^{\circ} C$ and $- {81.9}^{\circ} C$ respectively. Which of these has stronger intermolecular forces and why?

Discussion

22.	The wavelength associated with an electron accelerated through a potential difference of 100 V is nearly
Answer» The wavelength associated with an electron accelerated through a potential difference of 100 V is nearly

Discussion

23.	The standard electrode potentials, K+/K= -2.93V, Ag+/Ag = 0.80V, the electrode which is negatively charged is
Answer» The standard electrode potentials, K⁺/K= -2.93V, Ag⁺/Ag = 0.80V, the electrode which is negatively charged is

Discussion

24.	What is the P-P-P bond angle in P4 molecule in degrees?
Answer» What is the P-P-P bond angle in P₄ molecule in degrees?

Discussion

25.	In case of Friedel Craft alkylation, polyalkylation takes place because
Answer» In case of Friedel Craft alkylation, polyalkylation takes place because

Discussion

26.	PH of sulphuric acid whose molar concentration is equal to that of NaoH of PH=12 I got the answer as 2 but the actual answer is 1.7?! can i have an answer for this???
Answer» P^Hof sulphuric acid whose molar concentration is equal to that of NaoH of P^H=12 I got the answer as 2 but the actual answer is 1.7?! can i have an answer for this???

26.

PH of sulphuric acid whose molar concentration is equal to that of NaoH of PH=12 I got the answer as 2 but the actual answer is 1.7?! can i have an answer for this???

Answer»

P^Hof sulphuric acid whose molar concentration is equal to that of NaoH of P^H=12

I got the answer as 2 but the actual answer is 1.7?!

can i have an answer for this???

Discussion

27.	why was c-12 isotope accepted as the standard of measuring the atomic mass of elements inspite of hydrogen and oxygen erlier being the standard? why was no other elements taken for this choice?
Answer» why was c-12 isotope accepted as the standard of measuring the atomic mass of elements inspite of hydrogen and oxygen erlier being the standard? why was no other elements taken for this choice?

Discussion

28.	A solution contains 36.5 g of HCl dissolved in 100g of water. What is the molality of the solution?
Answer» A solution contains 36.5 g of HCl dissolved in 100g of water. What is the molality of the solution?

Discussion

29.	Cresol is
Answer» Cresol is

Discussion

30.	A given nitrogen-containing aromatic compound A reacts with Sn/HCl, followed by HNO2 to give an unstable compound B. B, on treatment with phenol,forms a beautiful coloured compound C with the molecular formula C12H10N2O. The structure of compound 'A' isRead more on Sarthaks.com - https://www.sarthaks.com/231600/given-nitrogen-containing-aromatic-compound-reacts-with-followed-hno2-unstable-compound
Answer» A given nitrogen-containing aromatic compound A reacts with Sn/HCl, followed by $H N O_{2}$ to give an unstable compound B. B, on treatment with phenol,forms a beautiful coloured compound C with the molecular formula $C_{12} H_{10} N_{2} O$ . The structure of compound 'A' isRead more on Sarthaks.com - https://www.sarthaks.com/231600/given-nitrogen-containing-aromatic-compound-reacts-with-followed-hno2-unstable-compound

Discussion

31.	Compound (A) is:
Answer» Compound (A) is:

Discussion

32.	The ratio of masses of oxygen and nitrogen in a particular gaseous mixture is 1:4. Their ratio of number of molecules is:
Answer» The ratio of masses of oxygen and nitrogen in a particular gaseous mixture is $1 : 4$ . Their ratio of number of molecules is:

Discussion

33.	If a dye absorbs a photon of wavelength λ and re-emits the absorbed energy as two photons of wavelength λ1 and λ2. Then:
Answer» If a dye absorbs a photon of wavelength $λ$ and re-emits the absorbed energy as two photons of wavelength $λ_{1}$ and $λ_{2}$ . Then:

Discussion

34.	A 600 W mercury lamp emits a monochromatic radiation of wavelength 331.3 nm. How many photons are emitted from the lamp per second? h=6.626×10−34 Js;velocity of light =3×108 ms−1
Answer» A 600 W mercury lamp emits a monochromatic radiation of wavelength 331.3 nm. How many photons are emitted from the lamp per second? $h = 6.626 \times 10^{- 34} Js; velocity of light = 3 \times 10^{8} {ms}^{- 1}$

Discussion

35.	comparitive lengths of A peptide and B peptide in human insulin? can i have an answer for this!!!!!!!!!!!!
Answer» comparitive lengths of A peptide and B peptide in human insulin? can i have an answer for this!!!!!!!!!!!!

35.

comparitive lengths of A peptide and B peptide in human insulin? can i have an answer for this!!!!!!!!!!!!

Answer»

comparitive lengths of A peptide and B peptide in human insulin?

can i have an answer for this!!!!!!!!!!!!

Discussion

36.	Which reducing agents can be used for the following transformation ? CH3−CH=CH−COOH→CH3−CH=CH−CH2OH
Answer» Which reducing agents can be used for the following transformation ? $C H_{3} - C H = C H - C O O H \to C H_{3} - C H = C H - C H_{2} O H$

Discussion

37.	With the help of a flow hart, show the phenomenon of biomagnifications of DDT in an aquatic food chain.
Answer» With the help of a flow hart, show the phenomenon of biomagnifications of DDT in an aquatic food chain.

Discussion

38.	According to Graham's Law, the rate of diffusion of CO,O2,N2 and CO2 follows the order:
Answer» According to Graham's Law, the rate of diffusion of $C O, O_{2}, N_{2} a n d C O_{2}$ follows the order:

Discussion

39.	How much copper is obtained from 100g of copper sulphate
Answer» How much copper is obtained from 100g of copper sulphate

Discussion

40.	Nylon - 6,6 is a
Answer» Nylon - 6,6 is a

Discussion

41.	A solution is prepared by dissolving a solid mixture of K2C2O4 and KHC2O4. A 10 ml portion of the solution required 10 ml of 0.05 M KOH solution. In a separate analysis 10 ml of the same stock solution required 25 ml of a 0.10 M HCl solution. List-I contains questions related to information given and List-II contains their answers. List - IList - II(I) The molar ratio of K2C2O4 and KHC2O4 in the mixture is(P) 1:2(II) Number of milli moles of KHC2O4in the mixture is(Q) 1.5(III) Number of milli moles of K2C2O4in the mixture is(R) 0.5(IV) Number of milli equivalents of acidifiedK2Cr2O7 required to oxidise 5 ml the solution is(S) 1(T) 2:1(U) 3 Which of the following options has the correct combination considering Lists-I, II?
Answer» A solution is prepared by dissolving a solid mixture of $K_{2} C_{2} O_{4} a n d K H C_{2} O_{4}$ . A 10 ml portion of the solution required 10 ml of 0.05 M $K O H$ solution. In a separate analysis 10 ml of the same stock solution required 25 ml of a 0.10 M $H C l$ solution. List-I contains questions related to information given and List-II contains their answers. $\begin{matrix} List - I & List - II (I) The molar ratio of K_{2} C_{2} O_{4} a n d K H C_{2} O_{4} in the mixture is & (P) 1:2 (II) Number of milli moles of K H C_{2} O_{4} in the mixture is & (Q) 1.5 (III) Number of milli moles of K_{2} C_{2} O_{4} in the mixture is & (R) 0.5 (IV) Number of milli equivalents of acidified K_{2} C r_{2} O_{7} required to oxidise 5 ml the solution is & (S) 1 (T) 2:1 (U) 3 \end{matrix}$ Which of the following options has the correct combination considering Lists-I, II?

Discussion

42.	An ideal gas is taken through a cyclic thermodynamical process through four steps Q1 = 5960J, Q2 = –5585J, Q3 = –2980J and Q4 = 3645J, respectively. The corresponding works involved are W1=2200J,W2=−825J,W3=−1100J and W4 respectively. The value of W4 is:
Answer» An ideal gas is taken through a cyclic thermodynamical process through four steps $Q_{1}$ = 5960J, $Q_{2}$ = –5585J, $Q_{3}$ = –2980J and $Q_{4}$ = 3645J, respectively. The corresponding works involved are $W_{1} = 2200 J, W_{2} = - 825 J, W_{3} = - 1100 J$ and $W_{4}$ respectively. The value of W4 is:

Discussion

43.	The red color of "ruby" is due to
Answer» The red color of "ruby" is due to

Discussion

44.	In lab H2O2 is prepared by
Answer» In lab $H_{2} O_{2}$ is prepared by

44.

In lab H2O2 is prepared by

Answer»

In lab $H_{2} O_{2}$ is prepared by

Discussion

45.	Name the pollutant attributed to be the cause of 'ozone hole' over the Antartica region? [1 Mark]
Answer» Name the pollutant attributed to be the cause of 'ozone hole' over the Antartica region? [1 Mark]

Discussion

46.	In the above compound, C2 is rotated clockwise 120∘ about C2−C3 bond. The resulting conformer is:
Answer» In the above compound, $C_{2}$ is rotated clockwise $120^{\circ}$ about $C_{2} - C_{3}$ bond. The resulting conformer is:

46.

In the above compound, C2 is rotated clockwise 120∘ about C2−C3 bond. The resulting conformer is:

Answer»

In the above compound, $C_{2}$ is rotated clockwise $120^{\circ}$ about $C_{2} - C_{3}$ bond. The resulting conformer is:

Discussion

47.	In which of the following acid – base titration, pH is greater than 8 at equivalence point?
Answer» In which of the following acid – base titration, pH is greater than 8 at equivalence point?

Discussion

48.	Considering the basic strength of amines in aqueous solution, which one has the smallest pKb value ?
Answer» Considering the basic strength of amines in aqueous solution, which one has the smallest $p K_{b}$ value ?

Discussion

49.	The basic structure of silicate is:-
Answer» The basic structure of silicate is:-

Discussion

50.	What is the hybridization of C atom in CH3 radical?
Answer» What is the hybridization of $C$ atom in $C H_{3}$ radical?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Among the following compounds which can be dehydrated very easily is

Arrange in order of increasing dipole movement. I. Toulene II. m - dichlorobenzene III. o - dichlorobenzene IV. p - dichlorobenzene

A solution which is 10−3M each in Mn2+,Fe2+ and Hg2+ is treated with 10−16 M sulphide ion, If Ksp of MnS,FeS,ZnS and HgS are 10−15,10−25,10−20 and 10−54 respectively, which one will precipitate first?

In the periodic table, the element with atomic number 16 will be placed in the group

The oxidation number of C inCO2 is

The unit cell with crystallographic dimensions, a≠b≠c,α=γ=90 and β≠90 is

Deuterons when bombarded on a nuclide produce 18Ar38 and neutrons. The target is

Metal posses two types of valency- Primary (ionizable) and secondary (non-ionizable) is the postulate of

What is the compound (Z) in the following sequence of reaction

Compound which is added to soap to impart antiseptic properties is .... (a) sodium laurylsulphate (b) sodium dodecylbenzenesulphonate ( c) rosin (d) bithional

According to Lewis concept of acids and bases, ethers are

Which of the following is an example of interstitial compound?

Which of the following will not undergo Hell- Volhard Zelinsky reaction?

What is the volume of CO2 gas obtained on the complete combustion of 30 mL of propane gas?

Magnetic moment of [MnCl4]2− is 5.92 BM. Explain giving reason present.

An organic compound C3H6O does not give a precipitate with 2,4‑Dinitrophenyl hydrazine reagent and does not react with metallic sodium. It could be:

Two equilibria are simultaneously exist in a vessel at 25 ∘C NO(g)+NO2(g)Kp1⇌N2O3(g) 2NO2(g)Kp2=8atm⇌N2O4(g) If initially only NO and NO2 are present in a 3:5 mole ratio and the total pressure at equilibrium is 5.5 atm with the pressure of NO2 at 0.5 atm, calculate Kp1.

Carbinol is[RPMT 2000]

Critical temperature for carbon dioxide and methane are 31.1∘C and –81.9∘C respectively. Which of these has stronger intermolecular forces and why?

The wavelength associated with an electron accelerated through a potential difference of 100 V is nearly

The standard electrode potentials, K+/K= -2.93V, Ag+/Ag = 0.80V, the electrode which is negatively charged is

What is the P-P-P bond angle in P4 molecule in degrees?

In case of Friedel Craft alkylation, polyalkylation takes place because

PH of sulphuric acid whose molar concentration is equal to that of NaoH of PH=12 I got the answer as 2 but the actual answer is 1.7?! can i have an answer for this???

why was c-12 isotope accepted as the standard of measuring the atomic mass of elements inspite of hydrogen and oxygen erlier being the standard? why was no other elements taken for this choice?

A solution contains 36.5 g of HCl dissolved in 100g of water. What is the molality of the solution?

Cresol is

Compound (A) is:

The ratio of masses of oxygen and nitrogen in a particular gaseous mixture is 1:4. Their ratio of number of molecules is:

If a dye absorbs a photon of wavelength λ and re-emits the absorbed energy as two photons of wavelength λ1 and λ2. Then:

A 600 W mercury lamp emits a monochromatic radiation of wavelength 331.3 nm. How many photons are emitted from the lamp per second? h=6.626×10−34 Js;velocity of light =3×108 ms−1

comparitive lengths of A peptide and B peptide in human insulin? can i have an answer for this!!!!!!!!!!!!

Which reducing agents can be used for the following transformation ? CH3−CH=CH−COOH→CH3−CH=CH−CH2OH

With the help of a flow hart, show the phenomenon of biomagnifications of DDT in an aquatic food chain.

According to Graham's Law, the rate of diffusion of CO,O2,N2 and CO2 follows the order:

How much copper is obtained from 100g of copper sulphate

Nylon - 6,6 is a

An ideal gas is taken through a cyclic thermodynamical process through four steps Q1 = 5960J, Q2 = –5585J, Q3 = –2980J and Q4 = 3645J, respectively. The corresponding works involved are W1=2200J,W2=−825J,W3=−1100J and W4 respectively. The value of W4 is:

The red color of "ruby" is due to

In lab H2O2 is prepared by

Name the pollutant attributed to be the cause of 'ozone hole' over the Antartica region? [1 Mark]

In the above compound, C2 is rotated clockwise 120∘ about C2−C3 bond. The resulting conformer is:

In which of the following acid – base titration, pH is greater than 8 at equivalence point?

Considering the basic strength of amines in aqueous solution, which one has the smallest pKb value ?

The basic structure of silicate is:-

What is the hybridization of C atom in CH3 radical?