46295 + Interview Questions in Chemistry

1.	Why is a disc-like surface present in the nodal point in d−z2 orbital?
Answer» Why is a disc-like surface present in the nodal point in $d - z^{2}$ orbital?

Discussion

2.	Which compound would give 2-methyl-5-oxohexanal upon reductive ozonolysis?
Answer» Which compound would give $2-methyl-5-oxohexanal$ upon reductive ozonolysis?

Discussion

3.	What is the vapour pressure of pure liquid a at 27 degree celsius is it forms an ideal solution with another liquid be the vapour pressure and mole fraction of fluid liquid be at 27 degree celsius is 142 and 0.2 respectively the total vapour pressure of the solution is 84 at 27° Celsius
Answer» What is the vapour pressure of pure liquid a at 27 degree celsius is it forms an ideal solution with another liquid be the vapour pressure and mole fraction of fluid liquid be at 27 degree celsius is 142 and 0.2 respectively the total vapour pressure of the solution is 84 at 27° Celsius

Discussion

4.	What are delocalised electrons
Answer» What are delocalised electrons

Discussion

5.	The frequency of the spectral line obtained when the electron in n = 3 of hydrogen atom drops to the ground state is:
Answer» The frequency of the spectral line obtained when the electron in n = 3 of hydrogen atom drops to the ground state is:

Discussion

6.	Change in internal energy is independent of path followed. Is it true? Why?
Answer» Change in internal energy is independent of path followed. Is it true? Why?

Discussion

7.	The ground state electronic configuration of chromium atom is:
Answer» The ground state electronic configuration of chromium atom is:

Discussion

8.	Which would undergo SN1 reaction faster in the following pair and why? CH3−CH2−Br and CH3−CH3\|C\|Br−CH3
Answer» Which would undergo $S_{N} 1$ reaction faster in the following pair and why? $C H_{3} - C H_{2} - B r and C H_{3} - C H_{3} \| C \| B r - C H_{3}$

Discussion

9.	What is critical miscelle concontration? And how does it affect the miscelle formation?
Answer» What is critical miscelle concontration? And how does it affect the miscelle formation?

9.

What is critical miscelle concontration? And how does it affect the miscelle formation?

Answer»

What is critical miscelle concontration?

And how does it affect the miscelle formation?

Discussion

10.	Which of the following shows only negative oxidation states?
Answer» Which of the following shows only negative oxidation states?

Discussion

11.	Which of the following statements are true for Mohr’s salt?
Answer» Which of the following statements are true for Mohr’s salt?

Discussion

12.	The ejection of the photoelectron from the silver metal in the photoelectric effect experiment can be stopped by applying the voltage of 0.35 V when the radiation 256.7 nm is used. Calculate the work function for silver metal.
Answer» The ejection of the photoelectron from the silver metal in the photoelectric effect experiment can be stopped by applying the voltage of 0.35 V when the radiation 256.7 nm is used. Calculate the work function for silver metal.

Discussion

13.	The central dogma of molecular genetics states that the genetic information flows from:
Answer» The central dogma of molecular genetics states that the genetic information flows from:

Discussion

14.	What will be the value of instantaneous rate of reaction from the graph?
Answer» What will be the value of instantaneous rate of reaction from the graph?

Discussion

15.	When a non-volatile solute is dissolved in a solvent, the relative lowering of vapour pressure is equal to:
Answer» When a non-volatile solute is dissolved in a solvent, the relative lowering of vapour pressure is equal to:

Discussion

16.	If elements with principal quantum number n>4 were not allowed in nature, the number of possible elements would be
Answer» If elements with principal quantum number n>4 were not allowed in nature, the number of possible elements would be

Discussion

17.	Which of the following represents the least number of molecules?
Answer» Which of the following represents the least number of molecules?

Discussion

18.	In the square planar crystal field, the 3d orbital will split into:
Answer» In the square planar crystal field, the 3d orbital will split into:

Discussion

19.	Write structures of the compounds whose IUPAC names are as follows. (a). 2-methylbutan-2-ol (b). 1-phenylpropan-2-ol (c). 3,5-dimethylhexane-1,3,5-triol (d). 2,3-diethylphenol (e). 1-ethoxypropane (f). 2-ethoxy-3-methylpentane (g). Cyclohexylmethanol (h). 3-cyclohexylpentan-3-ol (i). Cyclopent-3-en-1-ol (j). 3-chloromethylpentan-1-ol
Answer» Write structures of the compounds whose IUPAC names are as follows. (a). 2-methylbutan-2-ol (b). 1-phenylpropan-2-ol (c). 3,5-dimethylhexane-1,3,5-triol (d). 2,3-diethylphenol (e). 1-ethoxypropane (f). 2-ethoxy-3-methylpentane (g). Cyclohexylmethanol (h). 3-cyclohexylpentan-3-ol (i). Cyclopent-3-en-1-ol (j). 3-chloromethylpentan-1-ol

19.

Write structures of the compounds whose IUPAC names are as follows. (a). 2-methylbutan-2-ol (b). 1-phenylpropan-2-ol (c). 3,5-dimethylhexane-1,3,5-triol (d). 2,3-diethylphenol (e). 1-ethoxypropane (f). 2-ethoxy-3-methylpentane (g). Cyclohexylmethanol (h). 3-cyclohexylpentan-3-ol (i). Cyclopent-3-en-1-ol (j). 3-chloromethylpentan-1-ol

Answer»

Write structures of the compounds whose IUPAC names are as follows.
(a). 2-methylbutan-2-ol

(b). 1-phenylpropan-2-ol

(c). 3,5-dimethylhexane-1,3,5-triol

(d). 2,3-diethylphenol

(e). 1-ethoxypropane

(f). 2-ethoxy-3-methylpentane

(g). Cyclohexylmethanol

(h). 3-cyclohexylpentan-3-ol

(i). Cyclopent-3-en-1-ol

(j). 3-chloromethylpentan-1-ol

Discussion

20.	The density of Oxygen is 1.43 g/L at STP. The density of oxygen at 17∘ C and 800 torr is
Answer» The density of Oxygen is 1.43 g/L at STP. The density of oxygen at $17^{\circ}$ C and 800 torr is

Discussion

21.	What may be the stable oxidation state of the transition element with the following d-electron configuration in the ground state of their atoms: 3d3,3d5,3d8 and 3d4 ?
Answer» What may be the stable oxidation state of the transition element with the following d-electron configuration in the ground state of their atoms: $3 d^{3}, 3 d^{5}, 3 d^{8}$ and $3 d^{4}$ ?

Discussion

22.	Why does NH3 form hydrogen bond but PH3 does not?
Answer» Why does $N H_{3}$ form hydrogen bond but $P H_{3}$ does not?

Discussion

23.	The acid which forms only two series of salts is
Answer» The acid which forms only two series of salts is

Discussion

24.	Which of the following species is not stable?
Answer» Which of the following species is not stable?

Discussion

25.	Which sugar is called invert sugar? Why is it called so?
Answer» Which sugar is called invert sugar? Why is it called so?

Discussion

26.	In a process, 701 J of heat is absorbed by a system and 394 J of work is done by the system. What is the change in internal energy for the process?
Answer» In a process, 701 J of heat is absorbed by a system and 394 J of work is done by the system. What is the change in internal energy for the process?

Discussion

27.	What is localisation
Answer» What is localisation

Discussion

28.	From 392 mg of H2SO4 , 1.204 *10^21 molecules are removed. How many moles are left ?
Answer» From 392 mg of H2SO4 , 1.204 *10^21 molecules are removed. How many moles are left ?

Discussion

29.	Which of the following does not react with nitrous acid?
Answer» Which of the following does not react with nitrous acid?

Discussion

30.	A 5 litre flask contains 3.5gm of N2, 3g of H2 and 8g of O2 at 27∘C.Find the total pressure exerted by the mixture of these gases.
Answer» A 5 litre flask contains 3.5gm of $N_{2}$ , 3g of $H_{2}$ and 8g of $O_{2}$ at 27 $^{\circ}$ C.Find the total pressure exerted by the mixture of these gases.

Discussion

31.	200mL of gas are found to have pressure of 750 mm of mercury. What will be its volume if the pressure is doubled at the same temperature?
Answer» 200mL of gas are found to have pressure of 750 mm of mercury. What will be its volume if the pressure is doubled at the same temperature?

Discussion

32.	n - hexane X−→ 2 - methyl pentane+ 3 - methyl pentane. The name of the reaction and 'x' is
Answer» n - hexane $X - \to$ 2 - methyl pentane+ 3 - methyl pentane. The name of the reaction and 'x' is

Discussion

33.	When the mixture of [A+B+C] is dissolved in NaHCO3, A dissolve in NaHCO3, B and C remains as a residue. After that residue dissolves in aq. NaOH, C dissolves in it and B remains as residue. A, B, C can be respectively.
Answer» When the mixture of $[A + B + C]$ is dissolved in $N a H C O_{3},$ A dissolve in $N a H C O_{3},$ $B a n d C$ remains as a residue. After that residue dissolves in $a q . N a O H, C$ dissolves in it and $B$ remains as residue. $A, B, C$ can be respectively.

Discussion

34.	In the reaction A++ B→A+B+, there is no entropy change. If enthalpy change is 22 kJ of A+. The△G for the reaction (in kJ) is
Answer» In the reaction $A^{+} + B \to A + B^{+},$ there is no entropy change. If enthalpy change is 22 kJ of $A^{+}$ . The $△ G$ for the reaction (in $k J$ ) is

Discussion

35.	Hydrogen bonding is maximum in 1) C2H55OH 2) CH33OCH3 . 3) (CH3)C=O 4) CH3CHO
Answer» Hydrogen bonding is maximum in 1) C₂H₅5OH 2) CH₃3OCH₃. 3) (CH₃)C=O 4) CH₃CHO

35.

Hydrogen bonding is maximum in 1) C2H55OH 2) CH33OCH3 . 3) (CH3)C=O 4) CH3CHO

Answer»

Hydrogen bonding is maximum in

1) C₂H₅5OH 2) CH₃3OCH₃. 3) (CH₃)C=O

4) CH₃CHO

Discussion

36.	why is the enthalpy of vaporization and fusion of deuterium more than that of protium?
Answer» why is the enthalpy of vaporization and fusion of deuterium more than that of protium?

Discussion

37.	Chlorine is not used in the preparation of:
Answer» Chlorine is not used in the preparation of:

Discussion

38.	Why is sodium carbonate more soluble than sodium bicarbonate in water. Can we give any general statement that carbonates are more soluble than bicarbonates
Answer» Why is sodium carbonate more soluble than sodium bicarbonate in water. Can we give any general statement that carbonates are more soluble than bicarbonates

Discussion

39.	To get a n-type semiconductor from silicon, it should be doped with a substance with valency ................... (a) 2 (b) 1 (c) 3 (d) 5
Answer» To get a n-type semiconductor from silicon, it should be doped with a substance with valency ................... (a) 2 (b) 1 (c) 3 (d) 5

39.

To get a n-type semiconductor from silicon, it should be doped with a substance with valency ................... (a) 2 (b) 1 (c) 3 (d) 5

Answer»

To get a n-type semiconductor from silicon, it should be doped with a substance with valency ...................

(a) 2 (b) 1 (c) 3 (d) 5

Discussion

40.	A catalyst does not change the position of equilibrium of a reversible reaction because it increases the rate of
Answer» A catalyst does not change the position of equilibrium of a reversible reaction because it increases the rate of

Discussion

41.	What is the common name for this alcohol?
Answer» What is the common name for this alcohol?

Discussion

42.	Which of the following is a cyclic oxo acid?
Answer» Which of the following is a cyclic oxo acid?

Discussion

43.	8 g of sulphur is burnt to form Cl2 which is oxidized by Cl2 water. The solution is treated with BaCl2 solution. Number of moles of BaSO4 precipitated is
Answer» 8 g of sulphur is burnt to form $C l_{2}$ which is oxidized by $C l_{2}$ water. The solution is treated with $B a C l_{2}$ solution. Number of moles of $B a S O_{4}$ precipitated is

Discussion

44.	The oxidation number of sulphur is the least in
Answer» The oxidation number of sulphur is the least in

Discussion

45.	N2+3H2⇌2NH3 Which is correct statement if N2 is added at equilibrium condition?
Answer» $N_{2} + 3 H_{2} ⇌ 2 {NH}_{3}$ Which is correct statement if $N_{2}$ is added at equilibrium condition?

45.

N2+3H2⇌2NH3 Which is correct statement if N2 is added at equilibrium condition?

Answer»

$N_{2} + 3 H_{2} ⇌ 2 {NH}_{3}$

Which is correct statement if $N_{2}$ is added at equilibrium condition?

Discussion

46.	Find the total pressure to terms of Kp for 50% dissociation of PCl5 at 250∘C.
Answer» Find the total pressure to terms of $K_{p}$ for 50% dissociation of $P C l_{5}$ at $250^{\circ} C$ .

Discussion

47.	Which graph shows the correct trends for the size of Ln3+ ions?
Answer» Which graph shows the correct trends for the size of $L n^{3 +}$ ions?

Discussion

48.	A radioactive element has an atomic mass of 69.3 amu and a half-life of 120400 seconds. What will be the specific activity of the element?
Answer» A radioactive element has an atomic mass of 69.3 amu and a half-life of 120400 seconds. What will be the specific activity of the element?

Discussion

49.	According to CFT , in the octahedral complexes the d orbital splits into
Answer» According to CFT , in the octahedral complexes the d orbital splits into

Discussion

50.	Identify the statement that is not correct as far as structure of diborane is concerned
Answer» Identify the statement that is not correct as far as structure of diborane is concerned

50.

Identify the statement that is not correct as far as structure of diborane is concerned

Answer»

Identify the statement that is not correct as far as structure of diborane is concerned

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Why is a disc-like surface present in the nodal point in d−z2 orbital?

Which compound would give 2-methyl-5-oxohexanal upon reductive ozonolysis?

What is the vapour pressure of pure liquid a at 27 degree celsius is it forms an ideal solution with another liquid be the vapour pressure and mole fraction of fluid liquid be at 27 degree celsius is 142 and 0.2 respectively the total vapour pressure of the solution is 84 at 27° Celsius

What are delocalised electrons

The frequency of the spectral line obtained when the electron in n = 3 of hydrogen atom drops to the ground state is:

Change in internal energy is independent of path followed. Is it true? Why?

The ground state electronic configuration of chromium atom is:

Which would undergo SN1 reaction faster in the following pair and why? CH3−CH2−Br and CH3−CH3|C|Br−CH3

What is critical miscelle concontration? And how does it affect the miscelle formation?

Which of the following shows only negative oxidation states?

Which of the following statements are true for Mohr’s salt?

The ejection of the photoelectron from the silver metal in the photoelectric effect experiment can be stopped by applying the voltage of 0.35 V when the radiation 256.7 nm is used. Calculate the work function for silver metal.

The central dogma of molecular genetics states that the genetic information flows from:

What will be the value of instantaneous rate of reaction from the graph?

When a non-volatile solute is dissolved in a solvent, the relative lowering of vapour pressure is equal to:

If elements with principal quantum number n&gt;4 were not allowed in nature, the number of possible elements would be

Which of the following represents the least number of molecules?

In the square planar crystal field, the 3d orbital will split into:

The density of Oxygen is 1.43 g/L at STP. The density of oxygen at 17∘ C and 800 torr is

What may be the stable oxidation state of the transition element with the following d-electron configuration in the ground state of their atoms: 3d3,3d5,3d8 and 3d4 ?

Why does NH3 form hydrogen bond but PH3 does not?

The acid which forms only two series of salts is

Which of the following species is not stable?

Which sugar is called invert sugar? Why is it called so?

In a process, 701 J of heat is absorbed by a system and 394 J of work is done by the system. What is the change in internal energy for the process?

What is localisation

From 392 mg of H2SO4 , 1.204 *10^21 molecules are removed. How many moles are left ?

Which of the following does not react with nitrous acid?

A 5 litre flask contains 3.5gm of N2, 3g of H2 and 8g of O2 at 27∘C.Find the total pressure exerted by the mixture of these gases.

200mL of gas are found to have pressure of 750 mm of mercury. What will be its volume if the pressure is doubled at the same temperature?

n - hexane X−→ 2 - methyl pentane+ 3 - methyl pentane. The name of the reaction and 'x' is

When the mixture of [A+B+C] is dissolved in NaHCO3, A dissolve in NaHCO3, B and C remains as a residue. After that residue dissolves in aq. NaOH, C dissolves in it and B remains as residue. A, B, C can be respectively.

In the reaction A++ B→A+B+, there is no entropy change. If enthalpy change is 22 kJ of A+. The△G for the reaction (in kJ) is

Hydrogen bonding is maximum in 1) C2H55OH 2) CH33OCH3 . 3) (CH3)C=O 4) CH3CHO

why is the enthalpy of vaporization and fusion of deuterium more than that of protium?

Chlorine is not used in the preparation of:

Why is sodium carbonate more soluble than sodium bicarbonate in water. Can we give any general statement that carbonates are more soluble than bicarbonates

To get a n-type semiconductor from silicon, it should be doped with a substance with valency ................... (a) 2 (b) 1 (c) 3 (d) 5

A catalyst does not change the position of equilibrium of a reversible reaction because it increases the rate of

What is the common name for this alcohol?

Which of the following is a cyclic oxo acid?

8 g of sulphur is burnt to form Cl2 which is oxidized by Cl2 water. The solution is treated with BaCl2 solution. Number of moles of BaSO4 precipitated is

The oxidation number of sulphur is the least in

N2+3H2⇌2NH3 Which is correct statement if N2 is added at equilibrium condition?

Find the total pressure to terms of Kp for 50% dissociation of PCl5 at 250∘C.

Which graph shows the correct trends for the size of Ln3+ ions?

A radioactive element has an atomic mass of 69.3 amu and a half-life of 120400 seconds. What will be the specific activity of the element?

According to CFT , in the octahedral complexes the d orbital splits into

Identify the statement that is not correct as far as structure of diborane is concerned

If elements with principal quantum number n>4 were not allowed in nature, the number of possible elements would be