46295 + Interview Questions in Chemistry

1.	The degree of hydrolysis of a salt of a weak acidand a weak base in its 0.1 M solution is found tobe 50%. If the molarity of the solution is 0.2 M,the percentage hydrolysis of the salt should be(2Y 50%(1) 100%(4) 75%(3) 25%ration Cimol ) and
Answer» The degree of hydrolysis of a salt of a weak acidand a weak base in its 0.1 M solution is found tobe 50%. If the molarity of the solution is 0.2 M,the percentage hydrolysis of the salt should be(2Y 50%(1) 100%(4) 75%(3) 25%ration Cimol ) and

Discussion

2.	How are radioactive metals non-renewable ??
Answer» How are radioactive metals non-renewable ??

Discussion

3.	Do all the peroxides and superoxides of alkali metals behave as good oxidising agent without any exceptions ?
Answer» Do all the peroxides and superoxides of alkali metals behave as good oxidising agent without any exceptions ?

Discussion

4.	On which things kinetic energy depends in photoelectric effect?And explain photoelectric effect.
Answer» On which things kinetic energy depends in photoelectric effect? And explain photoelectric effect.

Discussion

5.	The correct sequence of the decreasing order of reactivity during hydrolysis of acid chlorides is:
Answer» The correct sequence of the decreasing order of reactivity during hydrolysis of acid chlorides is:

Discussion

6.	What is entropy and change in entropy ? Explain in detail
Answer» What is entropy and change in entropy ? Explain in detail

Discussion

7.	For a cell Reaction, X(s)+2y+→x2+2y Kc has been found to be 1012. The E0cell is
Answer» For a cell Reaction, $X (s) + 2 y^{+} \to x^{2} + 2 y$ $K_{c}$ has been found to be $10^{12}$ . The $E_{c e l l}^{0}$ is

Discussion

8.	What would be the major product of following reaction?
Answer» What would be the major product of following reaction?

Discussion

9.	how can sigma bond determine the direction of overlap?
Answer» how can sigma bond determine the direction of overlap?

Discussion

10.	Valence bond theory was proposed by________.
Answer» Valence bond theory was proposed by________.

Discussion

11.	In acidic medium if potassium permanganate is used as an oxidizing agent, we get
Answer» In acidic medium if potassium permanganate is used as an oxidizing agent, we get

Discussion

12.	what is polar molecular solids?
Answer» what is polar molecular solids?

Discussion

13.	When an acidified solution of Na2MoOn atm. Mass=96 is electrolyzed, O2 gas is liberated corresponding to a volume of 0.112L at STP and mass of No deposited is 0.32g.then, the formula of the salt and oxidation state of Mo is
Answer» When an acidified solution of Na2MoOn atm. Mass=96 is electrolyzed, O2 gas is liberated corresponding to a volume of 0.112L at STP and mass of No deposited is 0.32g.then, the formula of the salt and oxidation state of Mo is

Discussion

14.	which among effective nuclear charge and stable electric configuration is given priority while decideing the order of ionisaation energy
Answer» which among effective nuclear charge and stable electric configuration is given priority while decideing the order of ionisaation energy

Discussion

15.	46.the correct sequence of electron affinity of carbon nitrogen oxygen and fluorine is??
Answer» 46.the correct sequence of electron affinity of carbon nitrogen oxygen and fluorine is??

Discussion

16.	7.W work is done in expanding a gas to double its volume by isobaric process and w’ is work done in expanding this gas to double its volume by isothermal process from the same state. Then W/w’ is
Answer» 7.W work is done in expanding a gas to double its volume by isobaric process and w’ is work done in expanding this gas to double its volume by isothermal process from the same state. Then W/w’ is

Discussion

17.	At 25∘C,50 g of iron reacts with HCl to form FeCl2. The evolved hydrogen gas expands against a constant pressure of 1 bar. The work done by the gas during this expansion is J.(Round off to the nearest integer).[Given: R=8.14 J mol−1 K−1. Assume, hydrogen is an ideal gas][Atomic mass of Fe is 55.85 u]
Answer» At $25^{\circ} C, 50 g$ of iron reacts with $H C l$ to form $F e C l_{2}$ . The evolved hydrogen gas expands against a constant pressure of $1 bar$ . The work done by the gas during this expansion is $J$ . (Round off to the nearest integer). [Given: $R = 8.14 {J mol}^{- 1} K^{- 1}$ . Assume, hydrogen is an ideal gas] [Atomic mass of $F e$ is $55.85 u$ ]

Discussion

18.	If all the atoms present in the rectangular plane is removed in NaCl structure, then how many Cl- ion will be removed? Is it not 4?
Answer» If all the atoms present in the rectangular plane is removed in NaCl structure, then how many Cl- ion will be removed? Is it not 4?

Discussion

19.	THE MINIMUM ATOMIC NUMBER OF AN ELEMENT IN WHICH NUMBER OF S ELECTRON=NUMBER OF D ELECTRON
Answer» THE MINIMUM ATOMIC NUMBER OF AN ELEMENT IN WHICH NUMBER OF S ELECTRON=NUMBER OF D ELECTRON

Discussion

20.	What is the difference between refraction and refractive index
Answer» What is the difference between refraction and refractive index

Discussion

21.	In higher altitudes the temperature is very low so conceptually the solubility should be high, but it is not so why in this example only pressure is taken into consideration? why not temperature?
Answer» In higher altitudes the temperature is very low so conceptually the solubility should be high, but it is not so why in this example only pressure is taken into consideration? why not temperature?

Discussion

22.	Find and correct the errors in the statement:
Answer» Find and correct the errors in the statement:

Discussion

23.	Complétez avec des adverbes de quantité.(trop de, peu de, etc.)
Answer» Complétez avec des adverbes de quantité. (trop de, peu de, etc.)

Discussion

24.	It has been found that the pH of a 0.01M solution of an organic acid is 4.15. Calculate the concentration of the anion, the ionization constant of the acid and its pKa.
Answer» It has been found that the pH of a 0.01M solution of an organic acid is 4.15. Calculate the concentration of the anion, the ionization constant of the acid and its pKa.

Discussion

25.	An excess of compound 'A' (molecular formula C3H8O) is treated with acidified potassium dichromate to form a product 'B' (molecular formula C3H6O). 'B' forms a shining silver mirror on warming with ammoniacal silver nitrate. 'B' when treated with an aqueous solution of H2NCONHNH2, HCl and sodium acetate, it gives a product 'C'. Identify the structure of 'C'
Answer» An excess of compound 'A' (molecular formula C₃H₈O) is treated with acidified potassium dichromate to form a product 'B' (molecular formula C₃H₆O). 'B' forms a shining silver mirror on warming with ammoniacal silver nitrate. 'B' when treated with an aqueous solution of H₂NCONHNH_2,HCl and sodium acetate, it gives a product 'C'. Identify the structure of 'C'

Discussion

26.	viscocity of gases depends on temperature as
Answer» viscocity of gases depends on temperature as

Discussion

27.	What is the difference between covalent and molecular solids?
Answer» What is the difference between covalent and molecular solids?

Discussion

28.	Which of the following halide ions has the least polarizability by a given cation?1. F 2. Cl 3. Br 4. I
Answer» Which of the following halide ions has the least polarizability by a given cation? 1. F 2. Cl 3. Br 4. I

Discussion

29.	Use the following data to calculate second electron affinity of oxygen for the process O−(g)+e−(g)→O2−(g). Heat of sublimation of Mg(s)=147.7kJ/mol Ionisation energy of Mg(g) to form Mg2+(g)=2189 kJ/mol Bond dissociation energy for O2 =498.4 kJ/mol First electron affinity of O(g)=−141 kJ/mol Heat formation of MgO(s)=−601.7 kJ/mol lattice energy of MgO=−3791 kJ/mol
Answer» Use the following data to calculate second electron affinity of oxygen for the process $O^{-} (g) + e^{-} (g) \to O^{2 -} (g)$ . Heat of sublimation of $M g (s) = 147.7 k J / m o l$ Ionisation energy of $M g (g)$ to form $M g^{2 +} (g) = 2189 k J / m o l$ Bond dissociation energy for $O_{2}$ $= 498.4 k J / m o l$ First electron affinity of $O (g) = - 141 k J / m o l$ Heat formation of $M g O (s) = - 601.7 k J / m o l$ lattice energy of $M g O = - 3791 k J / m o l$

Discussion

30.	Why cu2+ has high hydration energy than cu+??
Answer» Why cu2+ has high hydration energy than cu+??

Discussion

31.	Derive k=273+temperature Celsius?
Answer» Derive k=273+temperature Celsius?

Discussion

32.	How many of the following metals are extracted by self reduction process? Pb, Au, Mg, Sn, Fe, Al, Ag, Hg, Na, Zn, Cu, Ca
Answer» How many of the following metals are extracted by self reduction process? $P b, A u, M g, S n, F e, A l, A g, H g, N a, Z n, C u, C a$

Discussion

33.	Write quantum numbers for valance shell of chromium
Answer» Write quantum numbers for valance shell of chromium

Discussion

34.	when 2 chloro propane rects with alc KOH product formed is ?
Answer» when 2 chloro propane rects with alc KOH product formed is ?

Discussion

35.	CH3CH2CHCl2\overset{}{\xrightarrow{3NaNH2} (A)\xrightarrow{EtBr}(B)}\xrightarrow{HgSO4/dil H2SO4}\lbrack Major Product\rbrack Product (C) is(1)2-butane(2) 2-pentanone(3) 3-pentanone(4) pentanal
Answer» CH3CH2CHCl2\overset{}{\xrightarrow{3NaNH2} (A)\xrightarrow{EtBr}(B)}\xrightarrow{HgSO4/dil H2SO4}\lbrack Major Product\rbrack Product (C) is(1)2-butane(2) 2-pentanone(3) 3-pentanone(4) pentanal

Discussion

36.	2. What is oxidation number
Answer» 2. What is oxidation number

Discussion

37.	If P, V, M, T and R are pressure, volume, molar mass, temperature and gas constant respectively, then for an ideal gas, the density is given by:
Answer» If $P, V, M, T$ and $R$ are pressure, volume, molar mass, temperature and gas constant respectively, then for an ideal gas, the density is given by:

Discussion

38.	Methyl - ethyl ketone can be reduced to n-butane using the reaction:
Answer» Methyl - ethyl ketone can be reduced to n-butane using the reaction:

Discussion

39.	Theequilibrium constant for the following reaction is 1.6 ×105at 1024 K.Findthe equilibrium pressure of all gases if 10.0 bar of HBr isintroduced into a sealed container at 1024 K.
Answer» The equilibrium constant for the following reaction is 1.6 ×10⁵ at 1024 K. Find the equilibrium pressure of all gases if 10.0 bar of HBr is introduced into a sealed container at 1024 K.

39.

Theequilibrium constant for the following reaction is 1.6 ×105at 1024 K.Findthe equilibrium pressure of all gases if 10.0 bar of HBr isintroduced into a sealed container at 1024 K.

Answer»

The
equilibrium constant for the following reaction is 1.6 ×10⁵
at 1024 K.

Find
the equilibrium pressure of all gases if 10.0 bar of HBr is
introduced into a sealed container at 1024 K.

Discussion

40.	why is delta s positive for chemisorption?
Answer» why is delta s positive for chemisorption?

Discussion

41.	0.0416 mol of a carbohydrate having an empirical formula CH2O contains 1 g of hydrogen. The molecular formula of the carbohydrate is:
Answer» 0.0416 mol of a carbohydrate having an empirical formula $C H_{2} O$ contains $1 g$ of hydrogen. The molecular formula of the carbohydrate is:

Discussion

42.	Select the correct sequence of increasing radius (left to right):
Answer» Select the correct sequence of increasing radius (left to right):

Discussion

43.	Question 9Naphthalene balls are obtained from coal tar and are used as(a) mosquito repellant(b) honeybee repellant(c) moth repellant(d) snake repellant
Answer» Question 9 Naphthalene balls are obtained from coal tar and are used as (a) mosquito repellant (b) honeybee repellant (c) moth repellant (d) snake repellant

Discussion

44.	In which of the following pairs the difference in dipole moment is maximum (A) cis and trance 1,2 dichloro ethene (B) cis and trance 1 chloro propene (C) o xylene m xylene
Answer» In which of the following pairs the difference in dipole moment is maximum (A) cis and trance 1,2 dichloro ethene (B) cis and trance 1 chloro propene (C) o xylene m xylene

Discussion

45.	Which statement is/are true about resonance?
Answer» Which statement is/are true about resonance?

Discussion

46.	Correct order of ionic character is _____
Answer» Correct order of ionic character is _____

Discussion

47.	At an equilibrium pressure of 4 atm, N2O4 dissociates 15% into NO2. At same temperature what will be equilibrium pressure required for 25% dissociation. (Given, N2O4(g)⇌2NO2(g))
Answer» At an equilibrium pressure of $4 a t m$ , $N_{2} O_{4}$ dissociates $15 %$ into $N O_{2}$ . At same temperature what will be equilibrium pressure required for $25 %$ dissociation. (Given, $N_{2} O_{4 (g)} ⇌ 2 N O_{2 (g)}$ )

Discussion

48.	the vapour pressure of pure benzene at a certain temperature is 0.850 bar. a non volatile and non electrolyte solid weighing 0.5 g when added to 39.0 g of benzene lowers the vapour pressure of the solution to 0.845 bar. calculate the molar mass of the subs†an ce
Answer» the vapour pressure of pure benzene at a certain temperature is 0.850 bar. a non volatile and non electrolyte solid weighing 0.5 g when added to 39.0 g of benzene lowers the vapour pressure of the solution to 0.845 bar. calculate the molar mass of the subs†an ce

Discussion

49.	Which of the following statement about low density polythene is FALSE?
Answer» Which of the following statement about low density polythene is FALSE?

Discussion

50.	To prepare a pure sample of n-hexane using sodium metal as one reactant, the other reactant will be
Answer» To prepare a pure sample of n-hexane using sodium metal as one reactant, the other reactant will be

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The degree of hydrolysis of a salt of a weak acidand a weak base in its 0.1 M solution is found tobe 50%. If the molarity of the solution is 0.2 M,the percentage hydrolysis of the salt should be(2Y 50%(1) 100%(4) 75%(3) 25%ration Cimol ) and

How are radioactive metals non-renewable ??

Do all the peroxides and superoxides of alkali metals behave as good oxidising agent without any exceptions ?

On which things kinetic energy depends in photoelectric effect?And explain photoelectric effect.

The correct sequence of the decreasing order of reactivity during hydrolysis of acid chlorides is:

What is entropy and change in entropy ? Explain in detail

For a cell Reaction, X(s)+2y+→x2+2y Kc has been found to be 1012. The E0cell is

What would be the major product of following reaction?

how can sigma bond determine the direction of overlap?

Valence bond theory was proposed by________.

In acidic medium if potassium permanganate is used as an oxidizing agent, we get

what is polar molecular solids?

When an acidified solution of Na2MoOn atm. Mass=96 is electrolyzed, O2 gas is liberated corresponding to a volume of 0.112L at STP and mass of No deposited is 0.32g.then, the formula of the salt and oxidation state of Mo is

which among effective nuclear charge and stable electric configuration is given priority while decideing the order of ionisaation energy

46.the correct sequence of electron affinity of carbon nitrogen oxygen and fluorine is??

7.W work is done in expanding a gas to double its volume by isobaric process and w’ is work done in expanding this gas to double its volume by isothermal process from the same state. Then W/w’ is

If all the atoms present in the rectangular plane is removed in NaCl structure, then how many Cl- ion will be removed? Is it not 4?

THE MINIMUM ATOMIC NUMBER OF AN ELEMENT IN WHICH NUMBER OF S ELECTRON=NUMBER OF D ELECTRON

What is the difference between refraction and refractive index

In higher altitudes the temperature is very low so conceptually the solubility should be high, but it is not so why in this example only pressure is taken into consideration? why not temperature?

Find and correct the errors in the statement:

Complétez avec des adverbes de quantité.(trop de, peu de, etc.)

It has been found that the pH of a 0.01M solution of an organic acid is 4.15. Calculate the concentration of the anion, the ionization constant of the acid and its pKa.

viscocity of gases depends on temperature as

What is the difference between covalent and molecular solids?

Which of the following halide ions has the least polarizability by a given cation?1. F 2. Cl 3. Br 4. I

Why cu2+ has high hydration energy than cu+??

Derive k=273+temperature Celsius?

How many of the following metals are extracted by self reduction process? Pb, Au, Mg, Sn, Fe, Al, Ag, Hg, Na, Zn, Cu, Ca

Write quantum numbers for valance shell of chromium

when 2 chloro propane rects with alc KOH product formed is ?

CH3CH2CHCl2\overset{}{\xrightarrow{3NaNH2} (A)\xrightarrow{EtBr}(B)}\xrightarrow{HgSO4/dil H2SO4}\lbrack Major Product\rbrack Product (C) is(1)2-butane(2) 2-pentanone(3) 3-pentanone(4) pentanal

2. What is oxidation number

If P, V, M, T and R are pressure, volume, molar mass, temperature and gas constant respectively, then for an ideal gas, the density is given by:

Methyl - ethyl ketone can be reduced to n-butane using the reaction:

Theequilibrium constant for the following reaction is 1.6 ×105at 1024 K.Findthe equilibrium pressure of all gases if 10.0 bar of HBr isintroduced into a sealed container at 1024 K.

why is delta s positive for chemisorption?

0.0416 mol of a carbohydrate having an empirical formula CH2O contains 1 g of hydrogen. The molecular formula of the carbohydrate is:

Select the correct sequence of increasing radius (left to right):

Question 9Naphthalene balls are obtained from coal tar and are used as(a) mosquito repellant(b) honeybee repellant(c) moth repellant(d) snake repellant

In which of the following pairs the difference in dipole moment is maximum (A) cis and trance 1,2 dichloro ethene (B) cis and trance 1 chloro propene (C) o xylene m xylene

Which statement is/are true about resonance?

Correct order of ionic character is _____

At an equilibrium pressure of 4 atm, N2O4 dissociates 15% into NO2. At same temperature what will be equilibrium pressure required for 25% dissociation. (Given, N2O4(g)⇌2NO2(g))

the vapour pressure of pure benzene at a certain temperature is 0.850 bar. a non volatile and non electrolyte solid weighing 0.5 g when added to 39.0 g of benzene lowers the vapour pressure of the solution to 0.845 bar. calculate the molar mass of the subs†an ce

Which of the following statement about low density polythene is FALSE?

To prepare a pure sample of n-hexane using sodium metal as one reactant, the other reactant will be