46295 + Interview Questions in Chemistry

1.	50 ml of hydrogen difuses out through a small hole from a vessel in 20 minutes.The time needed for 40 ml of oxygen to diffuse out is ___.
Answer» 50 ml of hydrogen difuses out through a small hole from a vessel in 20 minutes.The time needed for 40 ml of oxygen to diffuse out is ___.

Discussion

2.	Increasing order of bond length is? CO+ CO N2- O2 -
Answer» Increasing order of bond length is? CO+ CO N₂- O₂-

2.

Increasing order of bond length is? CO+ CO N2- O2 -

Answer»

Increasing order of bond length is?

CO+ CO N₂- O₂-

Discussion

3.	Which of the following is a free radical substitation reaction?
Answer» Which of the following is a free radical substitation reaction?

Discussion

4.	How much NH3 should be added to a solution of 0.0010 M Cu(NO3)2 to reduce [Cu2+] to 10−13? Neglect the amount of copper in complexes containing fewer than 4 ammonia molecules per copper atom.
Answer» How much $N H_{3}$ should be added to a solution of $0.0010 M$ $C u (N O_{3})_{2}$ to reduce $[C u^{2 +}]$ to $10^{- 13}$ ? Neglect the amount of copper in complexes containing fewer than 4 ammonia molecules per copper atom.

Discussion

5.	Which has the least bond angle
Answer» Which has the least bond angle

5.

Which has the least bond angle

Answer»

Which has the least bond angle

Discussion

6.	The bond disscioation energies of molecules A2, B2 and C2 are 945, 158, 498KJ/ mole respectively.if so, the correct decreasing order of their bond orders is
Answer» The bond disscioation energies of molecules $A_{2}, B_{2} a n d C_{2}$ are 945, 158, 498KJ/ mole respectively.if so, the correct decreasing order of their bond orders is

Discussion

7.	The basic character of MgO, SrO, K2O and NiO increases in the order:
Answer» The basic character of MgO, SrO, $K_{2} O$ and NiO increases in the order:

Discussion

8.	The rate constants K1 and K2 for two different reactions are 1015e−1000T and 1016e−2000T respectively. The temperature at which K1=K2 is:
Answer» The rate constants $K_{1}$ and $K_{2}$ for two different reactions are $10^{15} e^{- \frac{1000}{T}}$ and $10^{16} e^{- \frac{2000}{T}}$ respectively. The temperature at which $K_{1} = K_{2}$ is:

Discussion

9.	What will happen if alpha particles strike electron in gold foil experiment performed by rutherford?
Answer» What will happen if alpha particles strike electron in gold foil experiment performed by rutherford?

Discussion

10.	Internal energy is an example of
Answer» Internal energy is an example of

Discussion

11.	CCl4 cannot be used as:
Answer» CCl₄ cannot be used as:

Discussion

12.	is not a functional isomer of:
Answer» is not a functional isomer of:

Discussion

13.	Of the group 18 elements, __ is the most abundant in the Earth’s crust.
Answer» Of the group 18 elements, __ is the most abundant in the Earth’s crust.

Discussion

14.	A first order reaction has a rate constant 1.15×10−3s−1 How long will 5g of this reactant take to reduce to 3g ?
Answer» A first order reaction has a rate constant $1.15 \times 10^{- 3} s^{- 1}$ How long will 5g of this reactant take to reduce to 3g ?

Discussion

15.	Name the element which forms the stable fluoro complex anions:
Answer» Name the element which forms the stable fluoro complex anions:

Discussion

16.	How many atoms are sp2 hybridised in 7-ethyl-3-nonen-2,5,8-tricarboxylic acid?
Answer» How many atoms are $s p^{2}$ hybridised in 7-ethyl-3-nonen-2,5,8-tricarboxylic acid?

Discussion

17.	The percentage of ‘Al’ is least in
Answer» The percentage of ‘Al’ is least in

Discussion

18.	Natural sample of cupric carbonate contains 51.35% of copper, 9.74% of oxygen and 38.91% of carbon. Synthetic sample of the compound will contain:
Answer» Natural sample of cupric carbonate contains 51.35% of copper, 9.74% of oxygen and 38.91% of carbon. Synthetic sample of the compound will contain:

Discussion

19.	QUESTION 14.15 Differentiate between globular and fibrous proteins.
Answer» QUESTION 14.15 Differentiate between globular and fibrous proteins.

19.

QUESTION 14.15 Differentiate between globular and fibrous proteins.

Answer»

QUESTION 14.15

Differentiate between globular and fibrous proteins.

Discussion

20.	Which of following correctly represents the relation between capillary rise h and capillary radius r?
Answer» Which of following correctly represents the relation between capillary rise h and capillary radius r?

Discussion

21.	The compound that will react most readily with gaseous bromine has the formula
Answer» The compound that will react most readily with gaseous bromine has the formula

Discussion

22.	Two metallic oxides contain 27.6% and 30% oxygen respectively. If the formula of the first oxide is X3O4, the formula of the second will be:
Answer» Two metallic oxides contain 27.6% and 30% oxygen respectively. If the formula of the first oxide is $X_{3} O_{4}$ , the formula of the second will be:

Discussion

23.	A 10 g of a mixture of calcium chloride and sodium chloride is treated with Na2CO3 to precipitate calcium as calcium carbonate. This CaCO3 is heated to convert all the calcium to CaO and the final mass of CaO is 1.12 g. Calculate % by mass of NaCl in the original mixture.
Answer» A $10 g$ of a mixture of calcium chloride and sodium chloride is treated with $N a_{2} C O_{3}$ to precipitate calcium as calcium carbonate. This $C a C O_{3}$ is heated to convert all the calcium to $C a O$ and the final mass of $C a O$ is $1.12 g$ . Calculate $%$ by mass of $N a C l$ in the original mixture.

Discussion

24.	What is the final product of the given reaction sequence?
Answer» What is the final product of the given reaction sequence?

Discussion

25.	The two strands in DNA are not identieal but are complementary. Explain.
Answer» The two strands in DNA are not identieal but are complementary. Explain.

Discussion

26.	The arrangement of X− ions around A+ ion in solid AX is given in the figure (not drawn to scale). If the radius of X− is 250 pm, the radius of A+ is
Answer» The arrangement of $X^{-}$ ions around $A^{+}$ ion in solid AX is given in the figure (not drawn to scale). If the radius of $X^{-}$ is 250 pm, the radius of $A^{+}$ is

Discussion

27.	The suspension of slaked lime in water is known as
Answer» The suspension of slaked lime in water is known as

Discussion

28.	Arrange CsF, RbF, NaF, KF, and LiF in the decreasing order of lattice energy:
Answer» Arrange $C s F, R b F, N a F, K F,$ and $L i F$ in the decreasing order of lattice energy:

Discussion

29.	Which of the following oxidation states are the most characteristic for lead and tin respectively?
Answer» Which of the following oxidation states are the most characteristic for lead and tin respectively?

Discussion

30.	Calculate number of moles & molecules of ammonia present in calculate number of moles & molecules of ammonia. Present in 5.6 DM cube.of it's volume. (0.25mole,1.55* 10 raised to 23 mole cube .
Answer» Calculate number of moles & molecules of ammonia present in calculate number of moles & molecules of ammonia. Present in 5.6 DM cube.of it's volume. (0.25mole,1.55* 10 raised to 23 mole cube .

Discussion

31.	5 g of a gas is contained in a rigid container and is heated from 150C to 250C. Specific heat capacity of the gas at constant volume is 0.172 cal g−1C−1 and the mechanical equivalent of heat is 4.2 J cal−1 Calculate the change in the internal energy of the gas.
Answer» 5 g of a gas is contained in a rigid container and is heated from $15^{0} C$ to $25^{0} C$ . Specific heat capacity of the gas at constant volume is 0.172 cal $g {- 1}^{C} - 1$ and the mechanical equivalent of heat is 4.2 J $c a l^{- 1}$ Calculate the change in the internal energy of the gas.

Discussion

32.	Which ester given below can most easily be produced by acid catalysed esterification (Fischer's esterification)?
Answer» Which ester given below can most easily be produced by acid catalysed esterification (Fischer's esterification)?

Discussion

33.	If the radius of 3rd Bohr's orbit of an H-like atom is 477 pm, then what will be the radius of 4th Bohr's orbit of the same atom?
Answer» If the radius of 3rd Bohr's orbit of an H-like atom is 477 pm, then what will be the radius of 4th Bohr's orbit of the same atom?

Discussion

34.	What is the difference between 52u and 52g?
Answer» What is the difference between 52u and 52g?

Discussion

35.	Calculate the valency factor of the following: (i) Ca → Ca2++ 2e− (ii)K → K+ + e− (iii) Mn7+ + 5e−→ Mn2+
Answer» Calculate the valency factor of the following: (i) Ca $\to$ ${C a}^{2 +}$ + 2 $e^{-}$ (ii)K $\to$ $K^{+}$ + $e^{-}$ (iii) ${M n}^{7 +}$ + 5 $e^{-}$ $\to$ ${M n}^{2 +}$

35.

Calculate the valency factor of the following: (i) Ca → Ca2++ 2e− (ii)K → K+ + e− (iii) Mn7+ + 5e−→ Mn2+

Answer»

Calculate the valency factor of the following:
(i) Ca $\to$ ${C a}^{2 +}$ + 2 $e^{-}$
(ii)K $\to$ $K^{+}$ + $e^{-}$

(iii) ${M n}^{7 +}$ + 5 $e^{-}$ $\to$ ${M n}^{2 +}$

Discussion

36.	Why does heat of atomisation decreases down the group in alkali metal?
Answer» Why does heat of atomisation decreases down the group in alkali metal?

Discussion

37.	A saturated compound C5H12 on Mono chlorination given only one product. The compound is:
Answer» A saturated compound C₅H₁₂ on Mono chlorination given only one product. The compound is:

Discussion

38.	When heated above 916 degree C, iron change its crystal structure from bcc to cup structure without any changes in radius of atom. The ratio of the density of the crystal before heating and after heating is what?
Answer» When heated above 916 degree C, iron change its crystal structure from bcc to cup structure without any changes in radius of atom. The ratio of the density of the crystal before heating and after heating is what?

Discussion

39.	Which of the following is NOT true about the oxidation state of oxygen?
Answer» Which of the following is NOT true about the oxidation state of oxygen?

Discussion

40.	Sir standard temperature is 273K or 0 degree. But volume of water is generally given at 4 degree Celsius. Why it is generally given at 4 degrees rater than at standard temperature. Please explain. Thank you sir.
Answer» Sir standard temperature is 273K or 0 degree. But volume of water is generally given at 4 degree Celsius. Why it is generally given at 4 degrees rater than at standard temperature. Please explain. Thank you sir.

40.

Sir standard temperature is 273K or 0 degree. But volume of water is generally given at 4 degree Celsius. Why it is generally given at 4 degrees rater than at standard temperature. Please explain. Thank you sir.

Answer»

Sir standard temperature is 273K or 0 degree.

But volume of water is generally given at 4 degree Celsius.

Why it is generally given at 4 degrees rater than at standard temperature.

Please explain.

Thank you sir.

Discussion

41.	What is the formula of a compound in which the element Y forms hcp lattice and atoms of X occupy (23)rd of tetrahedral voids?
Answer» What is the formula of a compound in which the element Y forms hcp lattice and atoms of X occupy $(\frac{2}{3})^{r d}$ of tetrahedral voids?

Discussion

42.	The equilibrium pressure of the system NH4HS(s)⇋NH3(g) + H2S(g) is 8 atmosphere at a certain temerature at a certian temperature.The equilibrium constant Kps
Answer» The equilibrium pressure of the system $N H_{4} H S_{(s)}$ $⇋$ $N H_{3}$ (g) + $H_{2} S$ (g) is 8 atmosphere at a certain temerature at a certian temperature.The equilibrium constant $K_{p}$ s

Discussion

43.	Halogens combine with each other to form:
Answer» Halogens combine with each other to form:

Discussion

44.	When a solution of phosphine in water is decomposed in the presence of light, __ phosphorus is obtained
Answer» When a solution of phosphine in water is decomposed in the presence of light, __ phosphorus is obtained

Discussion

45.	The end product ‘W’, in the following sequence of reactions
Answer» The end product ‘W’, in the following sequence of reactions

Discussion

46.	In the following questions a statement of assertion (A) followed by a statement of reason (R) is given. Choose the correct answer out of the following choices. (a) Assertion and reason both are true, reason is correct explanation of assertion. (b) Assertion and reason both are true but reason is not the correct explanation of assertion. (c) Assertion is true, reason is false. (d) Assertion is false, reason is true. Assertion (A) Linkage isomerism arises in coordination compounds containing ambidentate ligand. Reason (R) Ambidentate ligand has two different donor atoms.
Answer» In the following questions a statement of assertion (A) followed by a statement of reason (R) is given. Choose the correct answer out of the following choices. (a) Assertion and reason both are true, reason is correct explanation of assertion. (b) Assertion and reason both are true but reason is not the correct explanation of assertion. (c) Assertion is true, reason is false. (d) Assertion is false, reason is true. Assertion (A) Linkage isomerism arises in coordination compounds containing ambidentate ligand. Reason (R) Ambidentate ligand has two different donor atoms.

Discussion

47.	What is lowest energy structure, in terms of formal charge?
Answer» What is lowest energy structure, in terms of formal charge?

Discussion

48.	Why is dark and cold conditions is preferred for chlorination of benzene when the chlorine is in excess quantities while usually the condition in which light is available is preferred? In have an assumption . light makes homolytic cleavage in which chlorine radical is resulted which is not preferred there and in dark condition the catalyst makes its work by breaking the chlorine bond by a heterolytic manner. Is my intuition correct? Or is there any other reason ?.
Answer» Why is dark and cold conditions is preferred for chlorination of benzene when the chlorine is in excess quantities while usually the condition in which light is available is preferred? In have an assumption . light makes homolytic cleavage in which chlorine radical is resulted which is not preferred there and in dark condition the catalyst makes its work by breaking the chlorine bond by a heterolytic manner. Is my intuition correct? Or is there any other reason ?.

Discussion

49.	In a crystal solid,anion y are arranged in ccp.Cation x are equally distributed between octahedral and tetrahedral voids.If all the octahedral voids are occupied,the chemical formula of the solid is
Answer» In a crystal solid,anion y are arranged in ccp.Cation x are equally distributed between octahedral and tetrahedral voids.If all the octahedral voids are occupied,the chemical formula of the solid is

Discussion

50.	Where are receptors located?
Answer» Where are receptors located?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

50 ml of hydrogen difuses out through a small hole from a vessel in 20 minutes.The time needed for 40 ml of oxygen to diffuse out is ___.

Increasing order of bond length is? CO+ CO N2- O2 -

Which of the following is a free radical substitation reaction?

How much NH3 should be added to a solution of 0.0010 M Cu(NO3)2 to reduce [Cu2+] to 10−13? Neglect the amount of copper in complexes containing fewer than 4 ammonia molecules per copper atom.

Which has the least bond angle

The bond disscioation energies of molecules A2, B2 and C2 are 945, 158, 498KJ/ mole respectively.if so, the correct decreasing order of their bond orders is

The basic character of MgO, SrO, K2O and NiO increases in the order:

The rate constants K1 and K2 for two different reactions are 1015e−1000T and 1016e−2000T respectively. The temperature at which K1=K2 is:

What will happen if alpha particles strike electron in gold foil experiment performed by rutherford?

Internal energy is an example of

CCl4 cannot be used as:

is not a functional isomer of:

Of the group 18 elements, __ is the most abundant in the Earth’s crust.

A first order reaction has a rate constant 1.15×10−3s−1 How long will 5g of this reactant take to reduce to 3g ?

Name the element which forms the stable fluoro complex anions:

How many atoms are sp2 hybridised in 7-ethyl-3-nonen-2,5,8-tricarboxylic acid?

The percentage of ‘Al’ is least in

Natural sample of cupric carbonate contains 51.35% of copper, 9.74% of oxygen and 38.91% of carbon. Synthetic sample of the compound will contain:

QUESTION 14.15 Differentiate between globular and fibrous proteins.

Which of following correctly represents the relation between capillary rise h and capillary radius r?

The compound that will react most readily with gaseous bromine has the formula

Two metallic oxides contain 27.6% and 30% oxygen respectively. If the formula of the first oxide is X3O4, the formula of the second will be:

A 10 g of a mixture of calcium chloride and sodium chloride is treated with Na2CO3 to precipitate calcium as calcium carbonate. This CaCO3 is heated to convert all the calcium to CaO and the final mass of CaO is 1.12 g. Calculate % by mass of NaCl in the original mixture.

What is the final product of the given reaction sequence?

The two strands in DNA are not identieal but are complementary. Explain.

The arrangement of X− ions around A+ ion in solid AX is given in the figure (not drawn to scale). If the radius of X− is 250 pm, the radius of A+ is

The suspension of slaked lime in water is known as

Arrange CsF, RbF, NaF, KF, and LiF in the decreasing order of lattice energy:

Which of the following oxidation states are the most characteristic for lead and tin respectively?

Calculate number of moles &amp; molecules of ammonia present in calculate number of moles &amp; molecules of ammonia. Present in 5.6 DM cube.of it's volume. (0.25mole,1.55* 10 raised to 23 mole cube .

5 g of a gas is contained in a rigid container and is heated from 150C to 250C. Specific heat capacity of the gas at constant volume is 0.172 cal g−1C−1 and the mechanical equivalent of heat is 4.2 J cal−1 Calculate the change in the internal energy of the gas.

Which ester given below can most easily be produced by acid catalysed esterification (Fischer's esterification)?

If the radius of 3rd Bohr's orbit of an H-like atom is 477 pm, then what will be the radius of 4th Bohr's orbit of the same atom?

What is the difference between 52u and 52g?

Calculate the valency factor of the following: (i) Ca → Ca2++ 2e− (ii)K → K+ + e− (iii) Mn7+ + 5e−→ Mn2+

Why does heat of atomisation decreases down the group in alkali metal?

A saturated compound C5H12 on Mono chlorination given only one product. The compound is:

When heated above 916 degree C, iron change its crystal structure from bcc to cup structure without any changes in radius of atom. The ratio of the density of the crystal before heating and after heating is what?

Which of the following is NOT true about the oxidation state of oxygen?

Sir standard temperature is 273K or 0 degree. But volume of water is generally given at 4 degree Celsius. Why it is generally given at 4 degrees rater than at standard temperature. Please explain. Thank you sir.

What is the formula of a compound in which the element Y forms hcp lattice and atoms of X occupy (23)rd of tetrahedral voids?

The equilibrium pressure of the system NH4HS(s)⇋NH3(g) + H2S(g) is 8 atmosphere at a certain temerature at a certian temperature.The equilibrium constant Kps

Halogens combine with each other to form:

When a solution of phosphine in water is decomposed in the presence of light, __ phosphorus is obtained

The end product ‘W’, in the following sequence of reactions

What is lowest energy structure, in terms of formal charge?

In a crystal solid,anion y are arranged in ccp.Cation x are equally distributed between octahedral and tetrahedral voids.If all the octahedral voids are occupied,the chemical formula of the solid is

Where are receptors located?

Calculate number of moles & molecules of ammonia present in calculate number of moles & molecules of ammonia. Present in 5.6 DM cube.of it's volume. (0.25mole,1.55* 10 raised to 23 mole cube .