46295 + Interview Questions in Chemistry

1.	The volume strength of 3% w/v H2O2?
Answer» The volume strength of 3% w/v H₂O₂?

Discussion

2.	Lattice enthalpy?
Answer» Lattice enthalpy?

Discussion

3.	What is the degree of freedom of oxygen and argon?
Answer» What is the degree of freedom of oxygen and argon?

Discussion

4.	Which of the following statement is correct?
Answer» Which of the following statement is correct?

Discussion

5.	Zone refining is also known as fractional __
Answer» Zone refining is also known as fractional __

Discussion

6.	Compressibility factor (Z) is plotted against pressure (P) for four different gases A,B,C & D. The correct order of critical temperature of the gases shown in the below graph is
Answer» Compressibility factor $(Z)$ is plotted against pressure $(P)$ for four different gases $A, B, C$ & $D$ . The correct order of critical temperature of the gases shown in the below graph is

Discussion

7.	How to solve logs using log tables during practical application calculation . Please explain with an example.
Answer» How to solve logs using log tables during practical application calculation . Please explain with an example.

Discussion

8.	Polyethylene can be produced from CaC2 according to the following sequence of reactions. CaC2+H2O→CaO+C2H2 (Yield = 70 %) C2H2+H2→C2H4 (Yield = 50 %) nC2H4→(CH2CH2)n (Yield = 20 %) Calculate the mass of polyethylene which can be produced from 20 kg of CaC2.
Answer» Polyethylene can be produced from $C a C_{2}$ according to the following sequence of reactions. $C a C_{2} + H_{2} O \to C a O + C_{2} H_{2} (Yield = 70 %)$ $C_{2} H_{2} + H_{2} \to C_{2} H_{4} (Yield = 50 %)$ $n C_{2} H_{4} \to (C H_{2} C H_{2})_{n} (Yield = 20 %)$ Calculate the mass of polyethylene which can be produced from $20 kg$ of $C a C_{2}$ .

Discussion

9.	A 100ml solution of 0.1N HCl was titrated with 0.2N NaOH solution . The titration was discontinued after adding 30ml of NaOH solution . The remaining titration was completed by adding 0.25 N KOH solution . The volume of KOH required for completing the titration is ___ . (a) 70 ml. (b) 32 ml. (c)35 ml. (d)16ml
Answer» A 100ml solution of 0.1N HCl was titrated with 0.2N NaOH solution . The titration was discontinued after adding 30ml of NaOH solution . The remaining titration was completed by adding 0.25 N KOH solution . The volume of KOH required for completing the titration is ___ . (a) 70 ml. (b) 32 ml. (c)35 ml. (d)16ml

9.

A 100ml solution of 0.1N HCl was titrated with 0.2N NaOH solution . The titration was discontinued after adding 30ml of NaOH solution . The remaining titration was completed by adding 0.25 N KOH solution . The volume of KOH required for completing the titration is ___ . (a) 70 ml. (b) 32 ml. (c)35 ml. (d)16ml

Answer»

A 100ml solution of 0.1N HCl was titrated with 0.2N NaOH solution . The titration was discontinued after adding 30ml of NaOH solution . The remaining titration was completed by adding 0.25 N KOH solution . The volume of KOH required for completing the titration is ___ .

(a) 70 ml. (b) 32 ml. (c)35 ml. (d)16ml

Discussion

10.	What do you mean by the statement, " the d orbitals of the transition element project to the periphery of an atom more than the other orbital. Hence, they are more influenced by the surrounding as well as affecting the atoms or molecules surrounding them."?
Answer» What do you mean by the statement, " the d orbitals of the transition element project to the periphery of an atom more than the other orbital. Hence, they are more influenced by the surrounding as well as affecting the atoms or molecules surrounding them."?

Discussion

11.	'B' in the above reaction is:
Answer» 'B' in the above reaction is:

Discussion

12.	According to Bohr, the angular momentum of an electron, in any orbit, should be:
Answer» According to Bohr, the angular momentum of an electron, in any orbit, should be:

Discussion

13.	What is the function of sodium cyanide in separation of ZnS and PbS ?
Answer» What is the function of sodium cyanide in separation of ZnS and PbS ?

Discussion

14.	The oxidation states of sulphur in the anions SO2−3,S2O2−4 and S2O2−6 and follows the order:
Answer» The oxidation states of sulphur in the anions $S O_{3}^{2 -}, S_{2} O_{4}^{2 -} a n d S_{2} O_{6}^{2 -}$ and follows the order:

Discussion

15.	Identify the correct balanced redox reaction by using ion-electron method: BiO−3+Mn2+→Bi3++MnO−4+H2O
Answer» Identify the correct balanced redox reaction by using ion-electron method: $B i O_{3}^{-} + M n^{2 +} \to B i^{3 +} + M n O_{4}^{-} + H_{2} O$

Discussion

16.	Sir.how to remember organic chemistry?
Answer» Sir.how to remember organic chemistry?

Discussion

17.	Cl2O7 dissolves in water to give
Answer» $C l_{2} O_{7}$ dissolves in water to give

Discussion

18.	The degeneracy of the H-atom in a shell is 9. The value of the principal quantumn number for the shell is?
Answer» The degeneracy of the H-atom in a shell is 9. The value of the principal quantumn number for the shell is?

Discussion

19.	A carbon compound on analysis gives the following percentage composition. Carbon 14.5 %, hydrogen 1.8 % chlorine 64.6 %, oxygen 19.24 %. The empirical formula of the compound is:
Answer» A carbon compound on analysis gives the following percentage composition. Carbon 14.5 %, hydrogen 1.8 % chlorine 64.6 %, oxygen 19.24 %. The empirical formula of the compound is:

Discussion

20.	Solid CO2 is an example of
Answer» Solid $C O_{2}$ is an example of

Discussion

21.	Calculate the mass of a silver atom.(Atomic weight of Ag=108)
Answer» Calculate the mass of a silver atom.(Atomic weight of Ag=108)

Discussion

22.	If each hydrogen atom is exerted by giving 8.4 ev of energy then the number of spectral lines emitted is equal to
Answer» If each hydrogen atom is exerted by giving 8.4 ev of energy then the number of spectral lines emitted is equal to

Discussion

23.	Why does hydration bond strength depends on atomic size?
Answer» Why does hydration bond strength depends on atomic size?

Discussion

24.	Give reasons for the following : (i) Though nitrogen exhibits +5 oxidation state, it does not form pentahalide. (ii) Electron gain enthalpy with negative sign of fluorine is less than that of chlorine. (iii) The two oxygen-oxygen bond lengths in ozone molecule are identical.
Answer» Give reasons for the following : (i) Though nitrogen exhibits +5 oxidation state, it does not form pentahalide. (ii) Electron gain enthalpy with negative sign of fluorine is less than that of chlorine. (iii) The two oxygen-oxygen bond lengths in ozone molecule are identical.

Discussion

25.	The more positive the value of E⊖, the greater is the tendency of the species to get reduced. Using the standard electrode potential of redox couples given below find out which of the following is the strongest oxidising agent. E\ominus values : Fe3+Fe2+=+0.77I2(S)I−=+0.54;Cu2+Cu=+0.34;Ag+Ag=0.80V (a) Fe3+ (b) I2(s) (c) Cu2+ (d) Ag+
Answer» The more positive the value of $E^{⊖}$ , the greater is the tendency of the species to get reduced. Using the standard electrode potential of redox couples given below find out which of the following is the strongest oxidising agent. E\ominus values : $\frac{F e^{3 +}}{F e^{2 +}} = + 0.77 \frac{I_{2} (S)}{I^{-}} = + 0.54; \frac{C u^{2 +}}{C u} = + 0.34; \frac{A g^{+}}{A g} = 0.80 V$ (a) $F e^{3 +}$ (b) $I_{2} (s)$ (c) $C u^{2 +}$ (d) $A g^{+}$

25.

The more positive the value of E⊖, the greater is the tendency of the species to get reduced. Using the standard electrode potential of redox couples given below find out which of the following is the strongest oxidising agent. E\ominus values : Fe3+Fe2+=+0.77I2(S)I−=+0.54;Cu2+Cu=+0.34;Ag+Ag=0.80V (a) Fe3+ (b) I2(s) (c) Cu2+ (d) Ag+

Answer»

The more positive the value of $E^{⊖}$ , the greater is the tendency of the species to get reduced. Using the standard electrode potential of redox couples given below find out which of the following is the strongest oxidising agent.

E\ominus values :

$\frac{F e^{3 +}}{F e^{2 +}} = + 0.77 \frac{I_{2} (S)}{I^{-}} = + 0.54; \frac{C u^{2 +}}{C u} = + 0.34; \frac{A g^{+}}{A g} = 0.80 V$

(a) $F e^{3 +}$
(b) $I_{2} (s)$
(c) $C u^{2 +}$
(d) $A g^{+}$

Discussion

26.	Choose the suitable method for the preparation of butan-1-ol from butene.
Answer» Choose the suitable method for the preparation of butan-1-ol from butene.

Discussion

27.	What are the two common counter stains?
Answer» What are the two common counter stains?

Discussion

28.	What happens when (a) Borax is heated strongly, (b) Boric acid is added to water, (c) Aluminium is treated with dilute NaOH, (d) BF3 is reacted with ammonia?
Answer» What happens when (a) Borax is heated strongly, (b) Boric acid is added to water, (c) Aluminium is treated with dilute NaOH, (d) $B F_{3}$ is reacted with ammonia?

28.

What happens when (a) Borax is heated strongly, (b) Boric acid is added to water, (c) Aluminium is treated with dilute NaOH, (d) BF3 is reacted with ammonia?

Answer»

What happens when

(a) Borax is heated strongly,

(b) Boric acid is added to water,

(c) Aluminium is treated with dilute NaOH,

(d) $B F_{3}$ is reacted with ammonia?

Discussion

29.	OH−CH2−CH−CH2−OH \| CH3 Write the IUPAC name of the given compound:
Answer» $O H - C H_{2} - C H - C H_{2} - O H \| C H_{3}$ Write the IUPAC name of the given compound:

29.

OH−CH2−CH−CH2−OH | CH3 Write the IUPAC name of the given compound:

Answer»

$O H - C H_{2} - C H - C H_{2} - O H | C H_{3}$

Write the IUPAC name of the given compound:

Discussion

30.	Which of the following does not decolourize bromine water?
Answer» Which of the following does not decolourize bromine water?

Discussion

31.	The number of molecule(s) which in pure form is/are unstable at room temperature among the following molecules:- ___
Answer» The number of molecule(s) which in pure form is/are unstable at room temperature among the following molecules:- ___

Discussion

32.	Which of the following reactions does not give a green coloured compound of Mn?
Answer» Which of the following reactions does not give a green coloured compound of $M n$ ?

Discussion

33.	Match List I with List II and select the correct answer using the codes given below the lists:-
Answer» Match List I with List II and select the correct answer using the codes given below the lists:-

33.

Match List I with List II and select the correct answer using the codes given below the lists:-

Answer»

Match List I with List II and select the correct answer using the codes given below the lists:-

Discussion

34.	Which of the following system has all unequal edge lengths and all bond angles equal?
Answer» Which of the following system has all unequal edge lengths and all bond angles equal?

Discussion

35.	How does physisorption change to chemisorption at high temperatures?
Answer» How does physisorption change to chemisorption at high temperatures?

Discussion

36.	Attraction of water molecules to polar surfaces is known as
Answer» Attraction of water molecules to polar surfaces is known as

Discussion

37.	Which of following is/are important characteristics of an ideal solution?
Answer» Which of following is/are important characteristics of an ideal solution?

Discussion

38.	What is the percentage degree of dissociation of 0.05 M NH4OH at 25 oC solution having pH=10 ?
Answer» What is the percentage degree of dissociation of $0.05 M N H_{4} O H$ at $25^{o} C$ solution having $p H = 10$ ?

Discussion

39.	What is the oxidation state of p in ph3
Answer» What is the oxidation state of p in ph3

Discussion

40.	During an adiabatic process
Answer» During an adiabatic process

Discussion

41.	Which among the following has the lowest boiling point?
Answer» Which among the following has the lowest boiling point?

Discussion

42.	If Cv=4.96 cal/mol.K then the amount of heat absorbed at constant volume, when temperature of 2 moles of this gas is increased from 332 K to 542 K is:
Answer» If $C_{v} = 4.96 c a l / m o l . K$ then the amount of heat absorbed at constant volume, when temperature of 2 moles of this gas is increased from $332 K$ to $542 K$ is:

Discussion

43.	An electron falls from one energy level to another; it releases a certain amount of light with a frequency of 5.100 x 1014 Hz. What energy is associated with this electron?
Answer» An electron falls from one energy level to another; it releases a certain amount of light with a frequency of 5.100 x 10¹⁴ Hz. What energy is associated with this electron?

Discussion

44.	Which of the following is the correct electronic configuration for oxygen according to Hund's rule?
Answer» Which of the following is the correct electronic configuration for oxygen according to Hund's rule?

Discussion

45.	When the 3d orbital is complete, the new electron enters
Answer» When the 3d orbital is complete, the new electron enters

Discussion

46.	Biphenyl is obtained by treating chlorobenzene with Na metal in presence of ether, the reaction is called as :
Answer» Biphenyl is obtained by treating chlorobenzene with Na metal in presence of ether, the reaction is called as :

Discussion

47.	Hydrolysis of methyl cyanide with dil. mineral acid gives:
Answer» Hydrolysis of methyl cyanide with dil. mineral acid gives:

Discussion

48.	What is the product formed when N, N-dimethyl acetamide is reduced?
Answer» What is the product formed when N, N-dimethyl acetamide is reduced?

Discussion

49.	. The compound X is
Answer» . The compound X is

Discussion

50.	Which of the following statements about control of particulate pollution is not correct?
Answer» Which of the following statements about control of particulate pollution is not correct?

50.

Which of the following statements about control of particulate pollution is not correct?

Answer»

Which of the following statements about control of particulate pollution is not correct?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The volume strength of 3% w/v H2O2?

Lattice enthalpy?

What is the degree of freedom of oxygen and argon?

Which of the following statement is correct?

Zone refining is also known as fractional __

Compressibility factor (Z) is plotted against pressure (P) for four different gases A,B,C &amp; D. The correct order of critical temperature of the gases shown in the below graph is

How to solve logs using log tables during practical application calculation . Please explain with an example.

Polyethylene can be produced from CaC2 according to the following sequence of reactions. CaC2+H2O→CaO+C2H2 (Yield = 70 %) C2H2+H2→C2H4 (Yield = 50 %) nC2H4→(CH2CH2)n (Yield = 20 %) Calculate the mass of polyethylene which can be produced from 20 kg of CaC2.

What do you mean by the statement, " the d orbitals of the transition element project to the periphery of an atom more than the other orbital. Hence, they are more influenced by the surrounding as well as affecting the atoms or molecules surrounding them."?

'B' in the above reaction is:

According to Bohr, the angular momentum of an electron, in any orbit, should be:

What is the function of sodium cyanide in separation of ZnS and PbS ?

The oxidation states of sulphur in the anions SO2−3,S2O2−4 and S2O2−6 and follows the order:

Identify the correct balanced redox reaction by using ion-electron method: BiO−3+Mn2+→Bi3++MnO−4+H2O

Sir.how to remember organic chemistry?

Cl2O7 dissolves in water to give

The degeneracy of the H-atom in a shell is 9. The value of the principal quantumn number for the shell is?

A carbon compound on analysis gives the following percentage composition. Carbon 14.5 %, hydrogen 1.8 % chlorine 64.6 %, oxygen 19.24 %. The empirical formula of the compound is:

Solid CO2 is an example of

Calculate the mass of a silver atom.(Atomic weight of Ag=108)

If each hydrogen atom is exerted by giving 8.4 ev of energy then the number of spectral lines emitted is equal to

Why does hydration bond strength depends on atomic size?

Give reasons for the following : (i) Though nitrogen exhibits +5 oxidation state, it does not form pentahalide. (ii) Electron gain enthalpy with negative sign of fluorine is less than that of chlorine. (iii) The two oxygen-oxygen bond lengths in ozone molecule are identical.

Choose the suitable method for the preparation of butan-1-ol from butene.

What are the two common counter stains?

What happens when (a) Borax is heated strongly, (b) Boric acid is added to water, (c) Aluminium is treated with dilute NaOH, (d) BF3 is reacted with ammonia?

OH−CH2−CH−CH2−OH | CH3 Write the IUPAC name of the given compound:

Which of the following does not decolourize bromine water?

The number of molecule(s) which in pure form is/are unstable at room temperature among the following molecules:- ___

Which of the following reactions does not give a green coloured compound of Mn?

Match List I with List II and select the correct answer using the codes given below the lists:-

Which of the following system has all unequal edge lengths and all bond angles equal?

How does physisorption change to chemisorption at high temperatures?

Attraction of water molecules to polar surfaces is known as

Which of following is/are important characteristics of an ideal solution?

What is the percentage degree of dissociation of 0.05 M NH4OH at 25 oC solution having pH=10 ?

What is the oxidation state of p in ph3

During an adiabatic process

Which among the following has the lowest boiling point?

If Cv=4.96 cal/mol.K then the amount of heat absorbed at constant volume, when temperature of 2 moles of this gas is increased from 332 K to 542 K is:

An electron falls from one energy level to another; it releases a certain amount of light with a frequency of 5.100 x 1014 Hz. What energy is associated with this electron?

Which of the following is the correct electronic configuration for oxygen according to Hund's rule?

When the 3d orbital is complete, the new electron enters

Biphenyl is obtained by treating chlorobenzene with Na metal in presence of ether, the reaction is called as :

Hydrolysis of methyl cyanide with dil. mineral acid gives:

What is the product formed when N, N-dimethyl acetamide is reduced?

. The compound X is

Which of the following statements about control of particulate pollution is not correct?

Compressibility factor (Z) is plotted against pressure (P) for four different gases A,B,C & D. The correct order of critical temperature of the gases shown in the below graph is