46295 + Interview Questions in Chemistry

1.	Give reason why PbCl2 is more stable than PbCl4
Answer» Give reason why PbCl2 is more stable than PbCl4

Discussion

2.	In a titration of 100 ml of water, 12 ml of saturated soap solution were required to produce good lather.What will be the degree of hardness of the sample?[1ml=0.001g of CaCO3]
Answer» In a titration of 100 ml of water, 12 ml of saturated soap solution were required to produce good lather.What will be the degree of hardness of the sample?[1ml=0.001g of ${C a C O}_{3}$ ]

2.

In a titration of 100 ml of water, 12 ml of saturated soap solution were required to produce good lather.What will be the degree of hardness of the sample?[1ml=0.001g of CaCO3]

Answer»

In a titration of 100 ml of water, 12 ml of saturated soap solution were required to produce good lather.What will be the degree of hardness of the sample?[1ml=0.001g of ${C a C O}_{3}$ ]

Discussion

3.	What is oxidation sate and How MnO4 has 5 as it's valence factor?
Answer» What is oxidation sate and How MnO4 has 5 as it's valence factor?

Discussion

4.	Which of the following reactions will yield phenol? (a) (b) (c) (d)
Answer» Which of the following reactions will yield phenol? (a) (b) (c) (d)

Discussion

5.	Which of the following formulae represents an alkane?
Answer» Which of the following formulae represents an alkane?

Discussion

6.	Which of the following is used as a source of O2 in space capsules, submarines etc.?
Answer» Which of the following is used as a source of $O_{2}$ in space capsules, submarines etc.?

Discussion

7.	CH3C≡CHNaNH2−−−−−→XCH2CH2Br−−−−−−−→Y. Identify the product 'Y' is
Answer» $C H_{3} C \equiv C H N a N H_{2} - ---- \to X C H_{2} C H_{2} B r - ------ \to Y .$ Identify the product 'Y' is

Discussion

8.	An aqueous solution freezes at –2.55∘ C. What will be the boiling point of solution? (Kb(H2O)=0.52K/m;Kf(H2O)=1.86 k/m)
Answer» An aqueous solution freezes at $- {2.55}^{\circ} C$ . What will be the boiling point of solution? $(K_{b} (H_{2} O) = 0.52 K / m; K_{f} (H_{2} O) = 1.86 k / m)$

Discussion

9.	How many chiral compounds are possible on monochlorination of 2- methylbutane?
Answer» How many chiral compounds are possible on monochlorination of $2 -$ methylbutane?

Discussion

10.	At low pressure, van der Waal’s equation for 1 mol can be represented as
Answer» At low pressure, van der Waal’s equation for 1 mol can be represented as

Discussion

11.	The horizontal bottom of a wide vessel with an ideal fluid has a round orifice of radius R1 over which a round closed cylinder is mounted, whose radius R2>R1 as shown in figure. The clearance between the cylinder and the bottom of the vessel is very small, the fluid density is ρ. Find the static gauge pressure of the fluid in the clearance as a function of the distance r from axis of the orifice (and the cylinder), if the height of the fluid is equal to h.
Answer» The horizontal bottom of a wide vessel with an ideal fluid has a round orifice of radius $R_{1}$ over which a round closed cylinder is mounted, whose radius $R_{2} > R_{1}$ as shown in figure. The clearance between the cylinder and the bottom of the vessel is very small, the fluid density is $ρ$ . Find the static gauge pressure of the fluid in the clearance as a function of the distance r from axis of the orifice (and the cylinder), if the height of the fluid is equal to h.

Discussion

12.	The temperature and volume of one mole an ideal gas during its expansion is related as T=T0+αV2 where T0 and α positive constants. R is the universal gas constant. The minimum attainable pressure is.
Answer» The temperature and volume of one mole an ideal gas during its expansion is related as $T = T_{0} + α V^{2}$ where $T_{0}$ and $α$ positive constants. R is the universal gas constant. The minimum attainable pressure is.

Discussion

13.	The most stable carbanion among the following is -
Answer» The most stable carbanion among the following is -

Discussion

14.	Two moles of an ideal gas (Cv,m=12.5 JK−1mol−1) are at 300 K and 5 dm3. If the gas is heated to 600 K and the volume changed to 10 dm3, calculate the entropy change. (take ln2=0.7, R=8.3 Jmol−1K−1)
Answer» Two moles of an ideal gas $(C_{v, m} = 12.5 J K^{- 1} m o l^{- 1})$ are at $300 K$ and $5 d m^{3}$ . If the gas is heated to $600 K$ and the volume changed to $10 d m^{3}$ , calculate the entropy change. (take ln2=0.7, $R = 8.3 J m o l^{- 1} K^{- 1}$ )

Discussion

15.	Arrange the following elements in the increasing order of their metallic character. Si, Be, Mg, Na, P
Answer» Arrange the following elements in the increasing order of their metallic character. $S i, B e, M g, N a, P$

Discussion

16.	The rate of formation of SO3 in reaction of 2SO2+O2→2SO3 is 100g per min. Hence rate of disappearance of O2 is:
Answer» The rate of formation of $S O_{3}$ in reaction of $2 S O_{2} + O_{2} \to 2 S O_{3}$ is 100g per min. Hence rate of disappearance of $O_{2}$ is:

Discussion

17.	What is a divalent halide?
Answer» What is a divalent halide?

Discussion

18.	Assertion : - Colour of KMno4 disappear when H2 gas is bubbled through it. Reason :- Dihydrogen gas reduces MnO4 - ions to Mn 2+ ions which are colourless. Answer says assertion is true but reason is false. Explain.
Answer» Assertion : - Colour of KMno4 disappear when H2 gas is bubbled through it. Reason :- Dihydrogen gas reduces MnO4 - ions to Mn 2+ ions which are colourless. Answer says assertion is true but reason is false. Explain.

18.

Assertion : - Colour of KMno4 disappear when H2 gas is bubbled through it. Reason :- Dihydrogen gas reduces MnO4 - ions to Mn 2+ ions which are colourless. Answer says assertion is true but reason is false. Explain.

Answer»

Assertion : - Colour of KMno4 disappear when H2 gas is bubbled through it.

Reason :- Dihydrogen gas reduces MnO4 - ions to Mn 2+ ions which are colourless.

Answer says assertion is true but reason is false. Explain.

Discussion

19.	Explain hydrophilic and hydrophilic.
Answer» Explain hydrophilic and hydrophilic.

Discussion

20.	The increasing order of the rate of reaction with HNO3/H2SO4:
Answer» The increasing order of the rate of reaction with $H N O_{3} / H_{2} S O_{4}$ :

Discussion

21.	Which of the following is a colorless complex ion?
Answer» Which of the following is a colorless complex ion?

Discussion

22.	Which of the following is not an isoelectronic species?
Answer» Which of the following is not an isoelectronic species?

Discussion

23.	Hello, I'm pretty confused what is the value of R (Gas constant) 8.31 or 0.0831 why do we use different values ,And on what basis should we determine which value of R to be used Please help !
Answer» Hello, I'm pretty confused what is the value of R (Gas constant) 8.31 or 0.0831 why do we use different values ,And on what basis should we determine which value of R to be used Please help !

23.

Hello, I'm pretty confused what is the value of R (Gas constant) 8.31 or 0.0831 why do we use different values ,And on what basis should we determine which value of R to be used Please help !

Answer»

Hello,

I'm pretty confused what is the value of R (Gas constant) 8.31 or 0.0831 why do we use different values ,And on what basis should we determine which value of R to be used

Please help !

Discussion

24.	2 mol of SO2 and I mol of O2 are heated in a closed vessel to reach the equilibrium: 2SO2(g)+O2(g)⇌2SO3(g). The equilibrium mixture exerted a pressure of 5 atm and required 13 mol of K2Cr2O7 in acidic medium. KP for the reaction is
Answer» 2 mol of $S O_{2}$ and I mol of $O_{2}$ are heated in a closed vessel to reach the equilibrium: $2 S O_{2 (g)} + O_{2 (g)} ⇌ 2 S O_{3 (g)}$ . The equilibrium mixture exerted a pressure of 5 atm and required $\frac{1}{3}$ mol of $K_{2} C r_{2} O_{7}$ in acidic medium. $K_{P}$ for the reaction is

Discussion

25.	Which carbocation is more likely to be formed in dehydration of
Answer» Which carbocation is more likely to be formed in dehydration of

25.

Which carbocation is more likely to be formed in dehydration of

Answer»

Which carbocation is more likely to be formed in
dehydration of

Discussion

26.	(NH4)2Cr2O7, on heating liberates a gas. The same gas will be obtained by:
Answer» $(N H_{4})_{2} C r_{2} O_{7},$ on heating liberates a gas. The same gas will be obtained by:

Discussion

27.	How many angular nodes does the valence shell of Cl have?
Answer» How many angular nodes does the valence shell of Cl have?

Discussion

28.	Q. Which of the following shows biggest jump in II and III ionization energy : a)1s^2,2s^2,2p^6,3s^2 b)1s^2,2s^2,2p^6,3s^2,3p^2 c)1s^2,2s^2,2p^6,3s^2,3p^6,4s^2,4p^2 d)1s^2,2s^2 Doubt : After removal of two electrons, option 'a' has the electonic configuration of Neon and option 'd' has the electronic configuration of Helium. Now how to choose between the two options ? Please explain.
Answer» Q. Which of the following shows biggest jump in II and III ionization energy : a)1s^2,2s^2,2p^6,3s^2 b)1s^2,2s^2,2p^6,3s^2,3p^2 c)1s^2,2s^2,2p^6,3s^2,3p^6,4s^2,4p^2 d)1s^2,2s^2 Doubt : After removal of two electrons, option 'a' has the electonic configuration of Neon and option 'd' has the electronic configuration of Helium. Now how to choose between the two options ? Please explain.

Discussion

29.	Explain the cause of low reactivity of lithium inspite of being strong reducing agent in acqueous solution.
Answer» Explain the cause of low reactivity of lithium inspite of being strong reducing agent in acqueous solution.

Discussion

30.	Question 17 Elements of which of the following group (s) of periodic table do not form hydrides? (a) Groups 7,8,9 (b) Group 13 (c) Groups 15,16,17 (d) Group 14
Answer» Question 17 Elements of which of the following group (s) of periodic table do not form hydrides? (a) Groups 7,8,9 (b) Group 13 (c) Groups 15,16,17 (d) Group 14

30.

Question 17 Elements of which of the following group (s) of periodic table do not form hydrides? (a) Groups 7,8,9 (b) Group 13 (c) Groups 15,16,17 (d) Group 14

Answer»

Question 17

Elements of which of the following group (s) of periodic table do not form hydrides?

(a) Groups 7,8,9 (b) Group 13

(c) Groups 15,16,17 (d) Group 14

Discussion

31.	5 moles of an ideal monoatomic gas absorbs 'X' joule heat when heated from 25∘C to 30∘C at constant volume. The amount of heat absorbed when 2 moles of the same gas is heated from 25∘C to 30∘C at constant pressure , is:
Answer» 5 moles of an ideal monoatomic gas absorbs ' $X$ ' joule heat when heated from $25^{\circ} C$ to $30^{\circ} C$ at constant volume. The amount of heat absorbed when 2 moles of the same gas is heated from $25^{\circ} C$ to $30^{\circ} C$ at constant pressure , is:

Discussion

32.	Question 47 Match the items given in Column I and Column II. Column IColumn IIA. Saturated solution 1. Solution having same osmotic pressure at a giventemperature as that of given solution.B. Binary solution 2. A solution whose osmotic pressure is less than that of another. C. Isotonic solution 3. Solution with two components. D. Hypotonic solution 4. A solution which contains maximum amount of solute that can be dissolved in a given amount of solvent at a given temperature. E. Solid solution 5. A solution whose osmotic pressure is more than that of another. F. Hypertonic solution.6. A solution in solid phase.
Answer» Question 47 Match the items given in Column I and Column II. $\begin{matrix} C o l u m n I & C o l u m n I I A . S a t u r a t e d s o l u t i o n & 1. S o l u t i o n h a v i n g s a m e o s m o t i c p r e s s u r e a t a g i v e n t e m p e r a t u r e a s t h a t o f g i v e n s o l u t i o n . B . B i n a r y s o l u t i o n & 2. A s o l u t i o n w h o s e o s m o t i c p r e s s u r e i s l e s s t h a n t h a t o f a n o t h e r . C . I s o t o n i c s o l u t i o n & 3. S o l u t i o n w i t h t w o c o m p o n e n t s . D . H y p o t o n i c s o l u t i o n & 4. A s o l u t i o n w h i c h c o n t a i n s m a x i m u m a m o u n t o f s o l u t e t h a t c a n b e d i s s o l v e d i n a g i v e n a m o u n t o f s o l v e n t a t a g i v e n t e m p e r a t u r e . E . S o l i d s o l u t i o n & 5. A s o l u t i o n w h o s e o s m o t i c p r e s s u r e i s m o r e t h a n t h a t o f a n o t h e r . F . H y p e r t o n i c s o l u t i o n . & 6. A s o l u t i o n i n s o l i d p h a s e . \end{matrix}$

Discussion

33.	Which of the following is a colligative property?
Answer» Which of the following is a colligative property?

Discussion

34.	Which of the following was observed in Rutherford's scattering experiment?
Answer» Which of the following was observed in Rutherford's scattering experiment?

Discussion

35.	If CaCl2 were a non electrolyte the freezing point depression of a 0.1 m solution of CaCl2in water would be 0.186 oC. What would be actual freezing point depression of this solution?
Answer» If CaCl₂ were a non electrolyte the freezing point depression of a 0.1 m solution of CaCl₂in water would be 0.186 ^oC. What would be actual freezing point depression of this solution?

Discussion

36.	Arenium ion which is not involved in the bromination of aniline is
Answer» Arenium ion which is not involved in the bromination of aniline is

Discussion

37.	(a) How would you account for the following : (i) The chemistry of actinoids is more complicated as compared to lanthanoids. (ii) Transition metals form complex compounds. (b) Complete the following equation : 2MnO−4+6H++5SO2−3→
Answer» (a) How would you account for the following : (i) The chemistry of actinoids is more complicated as compared to lanthanoids. (ii) Transition metals form complex compounds. (b) Complete the following equation : $2 M n O_{4}^{-} + 6 H^{+} + 5 S O_{3}^{2 -} \to$

Discussion

38.	A carbonyl compound P, which gives positive iodoform test, undergoes reaction with MeMgBr followed by dehydration to give an olefin Q. Ozonolysis of Q leads to a dicarbonyl compound R, which undergoes intra-molecular aldol reaction to give predominantly S. 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 give an olefin Q. Ozonolysis of Q leads to a dicarbonyl compound R, which undergoes intra-molecular aldol reaction to give predominantly S. The structure of the carbonyl compound P, is

Discussion

39.	Which of the following is correct order of acidic strength?
Answer» Which of the following is correct order of acidic strength?

Discussion

40.	Which of the following statements is/are true?
Answer» Which of the following statements is/are true?

Discussion

41.	In an adiabatic process, no transfer of heat takes place between system and surroundings. Choose the correct option for free expansion of an ideal gas under adiabatic condition from the following. (a) q=0, ΔT≠0,W=0 (b) q≠0, ΔT=0,W=0 (c) q=0,ΔT=0,W=0 (d) q=0,ΔT<0,W≠0
Answer» In an adiabatic process, no transfer of heat takes place between system and surroundings. Choose the correct option for free expansion of an ideal gas under adiabatic condition from the following. (a) $q = 0, Δ T \neq 0, W = 0$ (b) $q \neq 0, Δ T = 0, W = 0$ (c) $q = 0, Δ T = 0, W = 0$ (d) $q = 0, Δ T < 0, W \neq 0$

Discussion

42.	For the reaction : N2O5→2NO2+12O2−d[N2O5]dt=K1[N2O5],d[NO2]dt=K2[N2O5],and d[O2]dt=K3[N2O5] The K1,K2 and K3 are related as :
Answer» For the reaction : $N_{2} O_{5} \to 2 N O_{2} + \frac{1}{2} O_{2} \frac{- d [N_{2} O_{5}]}{d t} = K_{1} [N_{2} O_{5}], \frac{d [N O_{2}]}{d t} = K_{2} [N_{2} O_{5}], a n d \frac{d [O_{2}]}{d t} = K_{3} [N_{2} O_{5}]$ The $K_{1}, K_{2}$ and $K_{3}$ are related as :

Discussion

43.	Compound ′A′ has how many functional groups.
Answer» Compound $^{'} A^{'}$ has how many functional groups.

Discussion

44.	During detection of P, we get a canary yellow precipitate on the addition of ammonium molybdate. The number of atom(s) in sp3 hybridisation from the 15th group is
Answer» During detection of $P$ , we get a canary yellow precipitate on the addition of ammonium molybdate. The number of atom(s) in $s p^{3}$ hybridisation from the $15^{t h}$ group is

Discussion

45.	Which of the following pair(s) is/are isodiaphers?
Answer» Which of the following pair(s) is/are isodiaphers?

Discussion

46.	Which of the following graphs represents the Freundlich adsorption isotherm correctly?
Answer» Which of the following graphs represents the Freundlich adsorption isotherm correctly?

Discussion

47.	Which among the following molecules is polar?
Answer» Which among the following molecules is polar?

Discussion

48.	Element X and Y have common oxidation states as −3,+1 respectively. The most common compound formed by X and Y is:
Answer» Element $X a n d Y$ have common oxidation states as $- 3, + 1$ respectively. The most common compound formed by $X$ and $Y$ is:

Discussion

49.	How many covalent bonds are present in ethane?
Answer» How many covalent bonds are present in ethane?

Discussion

50.	How to convert reactants into products ?
Answer» How to convert reactants into products ?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Give reason why PbCl2 is more stable than PbCl4

​In a titration of 100 ml of water, 12 ml of saturated soap solution were required to produce good lather.What will be the degree of hardness of the sample?[1ml=0.001g of CaCO3]

What is oxidation sate and How MnO4 has 5 as it's valence factor?

Which of the following reactions will yield phenol? (a) (b) (c) (d)

Which of the following formulae represents an alkane?

Which of the following is used as a source of O2 in space capsules, submarines etc.?

CH3C≡CHNaNH2−−−−−→XCH2CH2Br−−−−−−−→Y. Identify the product 'Y' is

An aqueous solution freezes at –2.55∘ C. What will be the boiling point of solution? (Kb(H2O)=0.52K/m;Kf(H2O)=1.86 k/m)

How many chiral compounds are possible on monochlorination of 2- methylbutane?

At low pressure, van der Waal’s equation for 1 mol can be represented as

The temperature and volume of one mole an ideal gas during its expansion is related as T=T0+αV2 where T0 and α positive constants. R is the universal gas constant. The minimum attainable pressure is.

The most stable carbanion among the following is -

Two moles of an ideal gas (Cv,m=12.5 JK−1mol−1) are at 300 K and 5 dm3. If the gas is heated to 600 K and the volume changed to 10 dm3, calculate the entropy change. (take ln2=0.7, R=8.3 Jmol−1K−1)

Arrange the following elements in the increasing order of their metallic character. Si, Be, Mg, Na, P

The rate of formation of SO3 in reaction of 2SO2+O2→2SO3 is 100g per min. Hence rate of disappearance of O2 is:

What is a divalent halide?

Assertion : - Colour of KMno4 disappear when H2 gas is bubbled through it. Reason :- Dihydrogen gas reduces MnO4 - ions to Mn 2+ ions which are colourless. Answer says assertion is true but reason is false. Explain.

Explain hydrophilic and hydrophilic.

The increasing order of the rate of reaction with HNO3/H2SO4:

Which of the following is a colorless complex ion?

Which of the following is not an isoelectronic species?

Hello, I'm pretty confused what is the value of R (Gas constant) 8.31 or 0.0831 why do we use different values ,And on what basis should we determine which value of R to be used Please help !

2 mol of SO2 and I mol of O2 are heated in a closed vessel to reach the equilibrium: 2SO2(g)+O2(g)⇌2SO3(g). The equilibrium mixture exerted a pressure of 5 atm and required 13 mol of K2Cr2O7 in acidic medium. KP for the reaction is

Which carbocation is more likely to be formed in dehydration of

(NH4)2Cr2O7, on heating liberates a gas. The same gas will be obtained by:

How many angular nodes does the valence shell of Cl have?

Explain the cause of low reactivity of lithium inspite of being strong reducing agent in acqueous solution.

Question 17 Elements of which of the following group (s) of periodic table do not form hydrides? (a) Groups 7,8,9 (b) Group 13 (c) Groups 15,16,17 (d) Group 14

5 moles of an ideal monoatomic gas absorbs 'X' joule heat when heated from 25∘C to 30∘C at constant volume. The amount of heat absorbed when 2 moles of the same gas is heated from 25∘C to 30∘C at constant pressure , is:

Which of the following is a colligative property?

Which of the following was observed in Rutherford's scattering experiment?

If CaCl2 were a non electrolyte the freezing point depression of a 0.1 m solution of CaCl2in water would be 0.186 oC. What would be actual freezing point depression of this solution?

Arenium ion which is not involved in the bromination of aniline is

(a) How would you account for the following : (i) The chemistry of actinoids is more complicated as compared to lanthanoids. (ii) Transition metals form complex compounds. (b) Complete the following equation : 2MnO−4+6H++5SO2−3→

Which of the following is correct order of acidic strength?

Which of the following statements is/are true?

In an adiabatic process, no transfer of heat takes place between system and surroundings. Choose the correct option for free expansion of an ideal gas under adiabatic condition from the following. (a) q=0, ΔT≠0,W=0 (b) q≠0, ΔT=0,W=0 (c) q=0,ΔT=0,W=0 (d) q=0,ΔT&lt;0,W≠0

For the reaction : N2O5→2NO2+12O2−d[N2O5]dt=K1[N2O5],d[NO2]dt=K2[N2O5],and d[O2]dt=K3[N2O5] The K1,K2 and K3 are related as :

Compound ′A′ has how many functional groups.

During detection of P, we get a canary yellow precipitate on the addition of ammonium molybdate. The number of atom(s) in sp3 hybridisation from the 15th group is

Which of the following pair(s) is/are isodiaphers?

Which of the following graphs represents the Freundlich adsorption isotherm correctly?

Which among the following molecules is polar?

Element X and Y have common oxidation states as −3,+1 respectively. The most common compound formed by X and Y is:

How many covalent bonds are present in ethane?

How to convert reactants into products ?

In a titration of 100 ml of water, 12 ml of saturated soap solution were required to produce good lather.What will be the degree of hardness of the sample?[1ml=0.001g of CaCO3]

In an adiabatic process, no transfer of heat takes place between system and surroundings. Choose the correct option for free expansion of an ideal gas under adiabatic condition from the following. (a) q=0, ΔT≠0,W=0 (b) q≠0, ΔT=0,W=0 (c) q=0,ΔT=0,W=0 (d) q=0,ΔT<0,W≠0