46295 + Interview Questions in Chemistry

1.	What is hybridisation?
Answer» What is hybridisation?

Discussion

2.	Match the followingA) Thermal stability order of hydrides 1) Na > K >Rb> Li > CsB) Ionic nature of hydrides 2) Li > Na > K >Rb> CsC) I.P2 values order 3) CsH>RbH> KH >NaH>LiH D) Abundance decreasing order 4) LiH>NaH> KH >RbH>CsH
Answer» Match the following A) Thermal stability order of hydrides 1) Na > K >Rb> Li > Cs B) Ionic nature of hydrides 2) Li > Na > K >Rb> Cs C) I.P₂ values order 3) CsH>RbH> KH >NaH>LiH D) Abundance decreasing order 4) LiH>NaH> KH >RbH>CsH

2.

Match the followingA) Thermal stability order of hydrides 1) Na > K >Rb> Li > CsB) Ionic nature of hydrides 2) Li > Na > K >Rb> CsC) I.P2 values order 3) CsH>RbH> KH >NaH>LiH D) Abundance decreasing order 4) LiH>NaH> KH >RbH>CsH

Answer»

Match the following

A) Thermal stability order of hydrides 1) Na > K >Rb> Li > Cs

B) Ionic nature of hydrides 2) Li > Na > K >Rb> Cs

C) I.P₂ values order 3) CsH>RbH> KH >NaH>LiH

D) Abundance decreasing order 4) LiH>NaH> KH >RbH>CsH

Discussion

3.	KspMg(OH)2 is 4.0×10−12. The number of moles of Mg2+ ions in one litre of its saturated solution in 0.1 M NaOH is :
Answer» $K_{s p} M g (O H)_{2}$ is $4.0 \times 10^{- 12}$ . The number of moles of $M g^{2 +}$ ions in one litre of its saturated solution in 0.1 M NaOH is :

Discussion

4.	The ionization energy of hydrogen atom is -13.6 eV. The energy required to excite the electron in a hydrogen atom from the ground state to the first excited state is: (Avogadro's constant =6.022 × 1023)
Answer» The ionization energy of hydrogen atom is -13.6 eV. The energy required to excite the electron in a hydrogen atom from the ground state to the first excited state is: (Avogadro's constant =6.022 × 10²³)

Discussion

5.	Explain Why: gamma/(gamma-1)=m×Cv
Answer» Explain Why: gamma/(gamma-1)=m×Cv

Discussion

6.	Sir could you please tell me what is valency factor of KMnO4. And how to find it. Thank you sir.
Answer» Sir could you please tell me what is valency factor of KMnO4. And how to find it. Thank you sir.

6.

Sir could you please tell me what is valency factor of KMnO4. And how to find it. Thank you sir.

Answer»

Sir could you please tell me what is valency factor of KMnO4.

And how to find it.

Thank you sir.

Discussion

7.	If two identical mercury drops are combined to form a single drop, then its temperature will
Answer» If two identical mercury drops are combined to form a single drop, then its temperature will

7.

If two identical mercury drops are combined to form a single drop, then its temperature will

Answer»

If two identical mercury drops are combined to form a single drop, then its temperature will

Discussion

8.	Which of the following organic compounds polymerizes to form the polyester dacron ?
Answer» Which of the following organic compounds polymerizes to form the polyester dacron ?

Discussion

9.	Why the valence electrons of f block elements enter into the antipenultimate shell?
Answer» Why the valence electrons of f block elements enter into the antipenultimate shell?

Discussion

10.	Match the following: List- IList - II(Molecule)(number of lone pairs on central atom)(A) NH3(i) Two(B) H2O(ii) three(C) XeF2(iii) zero(D) CH4(iv) Four(v) One
Answer» Match the following: $\begin{matrix} List- I & List - II (Molecule) & (number of lone pairs on central atom) (A) N H_{3} & (i) Two (B) H_{2} O & (ii) three (C) X e F_{2} & (iii) zero (D) C H_{4} & (iv) Four (v) One \end{matrix}$

Discussion

11.	In the reaction: CaCO3+H2SO4→CaSO4+H2O+CO2 Calculate the amount (in g) of H2SO4 required to decompose 10 g CaCO3
Answer» In the reaction: $C a C O_{3} + H_{2} S O_{4} \to C a S O_{4} + H_{2} O + C O_{2}$ Calculate the amount (in g) of $H_{2} S O_{4}$ required to decompose $10 g C a C O_{3}$

Discussion

12.	In the nitration of benzene with a mixture of conc HNO3 and conc H2SO4, the active species involved are
Answer» In the nitration of benzene with a mixture of conc $H N O_{3}$ and conc $H_{2} S O_{4}$ , the active species involved are

Discussion

13.	A solution of Na2S2O3 is standarised iodometrically against 0.167 gram of KBrO3. This process requires 50 mL of the Na2S2O3 solution. What would be the normality of the Na2S2O3 solution? (Molar mass of KBrO3 is 167 g/mol)
Answer» A solution of $N a_{2} S_{2} O_{3}$ is standarised iodometrically against $0.167$ gram of $K B r O_{3}$ . This process requires $50 mL$ of the $N a_{2} S_{2} O_{3}$ solution. What would be the normality of the $N a_{2} S_{2} O_{3}$ solution? (Molar mass of $K B r O_{3}$ is $167 g/mol$ )

Discussion

14.	Why HF2- is present though HBr2-is not present?
Answer» Why HF2- is present though HBr2-is not present?

Discussion

15.	Which of the following elements represent highly electro positive as well as highly electro negative element in its period?
Answer» Which of the following elements represent highly electro positive as well as highly electro negative element in its period?

Discussion

16.	When an alkali is added to an orange red solution of dichromate, it forms:
Answer» When an alkali is added to an orange red solution of dichromate, it forms:

Discussion

17.	Knowing that Na+>Mg2+ and S2−>Cl−, predict which compound will be the least soluble in a polar solvent?
Answer» Knowing that $N a + > M g^{2 +}$ and $S^{2 -} > C l^{-}$ , predict which compound will be the least soluble in a polar solvent?

Discussion

18.	Which of the following is not an interstitial compound?
Answer» Which of the following is not an interstitial compound?

Discussion

19.	A gas consists of 5 molecules with a velocity of 5 m s−1, 10 molecules with a velocity of 3 m s−1 and 6 molecules with a velocity of 6 m s−1. The ratio of average velocity and rms velocity of the molecules is 9.5×10−x. Value of x is:
Answer» A gas consists of $5$ molecules with a velocity of $5 {m s}^{- 1}$ , $10$ molecules with a velocity of $3 {m s}^{- 1}$ and $6$ molecules with a velocity of $6 {m s}^{- 1}$ . The ratio of average velocity and rms velocity of the molecules is $9.5 \times 10^{- x}$ . Value of $x$ is:

Discussion

20.	Why some of the physical properties of solids show different values when measured along different directions in the same crystals?
Answer» Why some of the physical properties of solids show different values when measured along different directions in the same crystals?

Discussion

21.	Water flows in a horizontal tube of variable cross section as shown. If the pressure difference of water between X and Y is 600 N/m2, Area of cross section of pipe at X and Y are 3 cm2 and 1.5 cm2 respectively. Find the rate of flow of water through the tube. (Assume density of water as 1000 kg/m3 and 1√10=0.316)
Answer» Water flows in a horizontal tube of variable cross section as shown. If the pressure difference of water between $X$ and $Y$ is $600 N / m^{2}$ , Area of cross section of pipe at $X$ and $Y$ are $3 c m^{2}$ and $1.5 c m^{2}$ respectively. Find the rate of flow of water through the tube. $($ Assume density of water as $1000 k g / m^{3}$ and $\frac{1}{\sqrt{10}} = 0.316)$

21.

Water flows in a horizontal tube of variable cross section as shown. If the pressure difference of water between X and Y is 600 N/m2, Area of cross section of pipe at X and Y are 3 cm2 and 1.5 cm2 respectively. Find the rate of flow of water through the tube. (Assume density of water as 1000 kg/m3 and 1√10=0.316)

Answer»

Water flows in a horizontal tube of variable cross section as shown. If the pressure difference of water between $X$ and $Y$ is $600 N / m^{2}$ , Area of cross section of pipe at $X$ and $Y$ are $3 c m^{2}$ and $1.5 c m^{2}$ respectively. Find the rate of flow of water through the tube. $($ Assume density of water as $1000 k g / m^{3}$ and $\frac{1}{\sqrt{10}} = 0.316)$

Discussion

22.	In the following reaction, Na2S2O3 is converted to Na2S4O6. 2Na2S2O3+I2→Na2S4O6 + 2NaI The equivalent weight of Na2S2O3 for this reaction is: (The molecular weight of Na2S2O3=M)
Answer» In the following reaction, $N a_{2} S_{2} O_{3}$ is converted to $N a_{2} S_{4} O_{6}$ . $2 N a_{2} S_{2} O_{3} + I_{2} \to N a_{2} S_{4} O_{6} + 2 N a I$ The equivalent weight of $N a_{2} S_{2} O_{3}$ for this reaction is: (The molecular weight of $N a_{2} S_{2} O_{3} = M)$

Discussion

23.	If the equilibrium constant for N2(g)+O2(g)⇌2NO(g) is K, the equilibrium constant for 12N2(g)+12O2(g)⇌NO(g) will be:
Answer» If the equilibrium constant for $N_{2} (g) + O_{2} (g) ⇌ 2 N O (g)$ is $K$ , the equilibrium constant for $\frac{1}{2} N_{2} (g) + \frac{1}{2} O_{2} (g) ⇌ N O (g)$ will be:

Discussion

24.	Which one of the following graphs represent the behaviour of an ideal gas?
Answer» Which one of the following graphs represent the behaviour of an ideal gas?

Discussion

25.	Which of the following is a feasible reaction?
Answer» Which of the following is a feasible reaction?

Discussion

26.	Consider the following reaction and choose the possible product(s):
Answer» Consider the following reaction and choose the possible product(s):

Discussion

27.	How many of the following given molecules are aromatic in nature
Answer» How many of the following given molecules are aromatic in nature

Discussion

28.	The compound that do not act as oxidising agents among the following is/are
Answer» The compound that do not act as oxidising agents among the following is/are

Discussion

29.	If the vapour behaves ideally at 1000 K, determine the average translational kinetic energy of a molecule.
Answer» If the vapour behaves ideally at 1000 K, determine the average translational kinetic energy of a molecule.

Discussion

30.	The bond between carbon atom (1) and carbon atom (2) in compound N≡C−CH=CH2 involves the hybridised carbon as
Answer» The bond between carbon atom (1) and carbon atom (2) in compound $N \equiv C - C H = C H_{2}$ involves the hybridised carbon as

30.

The bond between carbon atom (1) and carbon atom (2) in compound N≡C−CH=CH2 involves the hybridised carbon as

Answer»

The bond between carbon atom (1) and carbon atom (2) in compound $N \equiv C - C H = C H_{2}$ involves the hybridised carbon as

Discussion

31.	Which of the following two reactions is SN2 and why?
Answer» Which of the following two reactions is $S_{N} 2$ and why?

Discussion

32.	Olefins can be hydrogenated by
Answer» Olefins can be hydrogenated by

Discussion

33.	An aqueous solution of potash alum is -
Answer» An aqueous solution of potash alum is -

Discussion

34.	What is the meaning of density as a standalone term?
Answer» What is the meaning of density as a standalone term?

Discussion

35.	What is the formula for PDI?
Answer» What is the formula for PDI?

Discussion

36.	The insecticide chlordane is warmed with dilute NaOH solution for some time. The expected product would be
Answer» The insecticide chlordane is warmed with dilute NaOH solution for some time. The expected product would be

Discussion

37.	Which of the following substances are repelled by magnetic field?
Answer» Which of the following substances are repelled by magnetic field?

Discussion

38.	The most unlikely representation of resonance strucure of p-nirophenoxide ion is: (correct answer +1, wrong answer -0.25)
Answer» The most unlikely representation of resonance strucure of p-nirophenoxide ion is: (correct answer +1, wrong answer -0.25)

Discussion

39.	2NaNO3 + 10Na → ______ + N2 2NaNO2 + 6Na → ______ + N2 The product obtained is as follows.
Answer» $2 N a N O_{3} + 10 N a \to$ ______ $+ N_{2}$ $2 N a N O_{2} + 6 N a \to$ ______ $+ N_{2}$ The product obtained is as follows.

39.

2NaNO3 + 10Na → + N2 2NaNO2 + 6Na → + N2 The product obtained is as follows.

Answer»

$2 N a N O_{3} + 10 N a \to$ ______ $+ N_{2}$

$2 N a N O_{2} + 6 N a \to$ ______ $+ N_{2}$ The product obtained is as follows.

Discussion

40.	Ortho-hydrogen and Para-hydrogen resemble in which one of the following properties?
Answer» Ortho-hydrogen and Para-hydrogen resemble in which one of the following properties?

Discussion

41.	The uncertainty in momentum of an electron is 1 × 10−5 kg−m/s. The uncertainty in its position will be (h = 6.62 × 10−34 kg−m2/s)
Answer» The uncertainty in momentum of an electron is $1 \times 10^{- 5} k g - m / s$ . The uncertainty in its position will be ( $h = 6.62 \times 10^{- 34} k g - m^{2} / s$ )

Discussion

42.	Where did the study of atoms and its fundamental particles reach ed until today?
Answer» Where did the study of atoms and its fundamental particles reach ed until today?

Discussion

43.	An aqueous solution freezes at -0.2°C. What is the molality of the solution. Determine also the- (I) elevation in boiling point (II) Lowering of vapour pressure Given Kf=1.86°C Kg/mol Kb=0.512°C Kg/mol. Vapour pressure of water=23.756 mm
Answer» An aqueous solution freezes at -0.2°C. What is the molality of the solution. Determine also the- (I) elevation in boiling point (II) Lowering of vapour pressure Given Kf=1.86°C Kg/mol Kb=0.512°C Kg/mol. Vapour pressure of water=23.756 mm

43.

An aqueous solution freezes at -0.2°C. What is the molality of the solution. Determine also the- (I) elevation in boiling point (II) Lowering of vapour pressure Given Kf=1.86°C Kg/mol Kb=0.512°C Kg/mol. Vapour pressure of water=23.756 mm

Answer»

An aqueous solution freezes at -0.2°C. What is the molality of the solution. Determine also the-

(I) elevation in boiling point

(II) Lowering of vapour pressure

Given Kf=1.86°C Kg/mol Kb=0.512°C Kg/mol.

Vapour pressure of water=23.756 mm

Discussion

44.	Which of the following has fractional bond order
Answer» Which of the following has fractional bond order

Discussion

45.	The average molecular speed is the greatest in which of the following gas samples?
Answer» The average molecular speed is the greatest in which of the following gas samples?

Discussion

46.	How many of the following compounds liberate CO2 with NaHCO3 ___
Answer» How many of the following compounds liberate $C O_{2}$ with $N a H C O_{3}$ ___

Discussion

47.	The temperature and pressure at which ice, liquid water and water vapour can exist together are
Answer» The temperature and pressure at which ice, liquid water and water vapour can exist together are

Discussion

48.	The number of ways in which 5A's and 6B's can be arranged to form a string of text which reads the same way backward and forward is
Answer» The number of ways in which 5A's and 6B's can be arranged to form a string of text which reads the same way backward and forward is

Discussion

49.	The rate of a first order reaction has been found to be 2.45×10−6molL−1s−1at concentration C1. The value of C1 is (rate constant = 3.5×10−5)
Answer» The rate of a first order reaction has been found to be $2.45 \times 10^{- 6} m o l L^{- 1} s^{- 1}$ at concentration $C_{1}$ . The value of $C_{1}$ is (rate constant = $3.5 \times 10^{- 5}$ )

Discussion

50.	Differentiate between on-the-job training and off-the-job training.
Answer» Differentiate between on-the-job training and off-the-job training.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

What is hybridisation?

Match the followingA) Thermal stability order of hydrides 1) Na &gt; K &gt;Rb&gt; Li &gt; CsB) Ionic nature of hydrides 2) Li &gt; Na &gt; K &gt;Rb&gt; CsC) I.P2 values order 3) CsH&gt;RbH&gt; KH &gt;NaH&gt;LiH D) Abundance decreasing order 4) LiH&gt;NaH&gt; KH &gt;RbH&gt;CsH

KspMg(OH)2 is 4.0×10−12. The number of moles of Mg2+ ions in one litre of its saturated solution in 0.1 M NaOH is :

The ionization energy of hydrogen atom is -13.6 eV. The energy required to excite the electron in a hydrogen atom from the ground state to the first excited state is: (Avogadro's constant =6.022 × 1023)

Explain Why: gamma/(gamma-1)=m×Cv

Sir could you please tell me what is valency factor of KMnO4. And how to find it. Thank you sir.

If two identical mercury drops are combined to form a single drop, then its temperature will

Which of the following organic compounds polymerizes to form the polyester dacron ?

Why the valence electrons of f block elements enter into the antipenultimate shell?

Match the following: List- IList - II(Molecule)(number of lone pairs on central atom)(A) NH3(i) Two(B) H2O(ii) three(C) XeF2(iii) zero(D) CH4(iv) Four(v) One

In the reaction: CaCO3+H2SO4→CaSO4+H2O+CO2 Calculate the amount (in g) of H2SO4 required to decompose 10 g CaCO3

In the nitration of benzene with a mixture of conc HNO3 and conc H2SO4, the active species involved are

A solution of Na2S2O3 is standarised iodometrically against 0.167 gram of KBrO3. This process requires 50 mL of the Na2S2O3 solution. What would be the normality of the Na2S2O3 solution? (Molar mass of KBrO3 is 167 g/mol)

Why HF2- is present though HBr2-is not present? ​​​​​​

Which of the following elements represent highly electro positive as well as highly electro negative element in its period?

When an alkali is added to an orange red solution of dichromate, it forms:

Knowing that Na+&gt;Mg2+ and S2−&gt;Cl−, predict which compound will be the least soluble in a polar solvent?

Which of the following is not an interstitial compound?

A gas consists of 5 molecules with a velocity of 5 m s−1, 10 molecules with a velocity of 3 m s−1 and 6 molecules with a velocity of 6 m s−1. The ratio of average velocity and rms velocity of the molecules is 9.5×10−x. Value of x is:

Why some of the physical properties of solids show different values when measured along different directions in the same crystals?

In the following reaction, Na2S2O3 is converted to Na2S4O6. 2Na2S2O3+I2→Na2S4O6 + 2NaI The equivalent weight of Na2S2O3 for this reaction is: (The molecular weight of Na2S2O3=M)

If the equilibrium constant for N2(g)+O2(g)⇌2NO(g) is K, the equilibrium constant for 12N2(g)+12O2(g)⇌NO(g) will be:

Which one of the following graphs represent the behaviour of an ideal gas?

Which of the following is a feasible reaction?

Consider the following reaction and choose the possible product(s):

How many of the following given molecules are aromatic in nature

The compound that do not act as oxidising agents among the following is/are

If the vapour behaves ideally at 1000 K, determine the average translational kinetic energy of a molecule.

The bond between carbon atom (1) and carbon atom (2) in compound N≡C−CH=CH2 involves the hybridised carbon as

Which of the following two reactions is SN2 and why?

Olefins can be hydrogenated by

An aqueous solution of potash alum is -

What is the meaning of density as a standalone term?

What is the formula for PDI?

The insecticide chlordane is warmed with dilute NaOH solution for some time. The expected product would be

Which of the following substances are repelled by magnetic field?

The most unlikely representation of resonance strucure of p-nirophenoxide ion is: (correct answer +1, wrong answer -0.25)

2NaNO3 + 10Na → ______ + N2 2NaNO2 + 6Na → ______ + N2 The product obtained is as follows.

Ortho-hydrogen and Para-hydrogen resemble in which one of the following properties?

The uncertainty in momentum of an electron is 1 × 10−5 kg−m/s. The uncertainty in its position will be (h = 6.62 × 10−34 kg−m2/s)

Where did the study of atoms and its fundamental particles reach ed until today?

An aqueous solution freezes at -0.2°C. What is the molality of the solution. Determine also the- (I) elevation in boiling point (II) Lowering of vapour pressure Given Kf=1.86°C Kg/mol Kb=0.512°C Kg/mol. Vapour pressure of water=23.756 mm

Which of the following has fractional bond order

The average molecular speed is the greatest in which of the following gas samples?

How many of the following compounds liberate CO2 with NaHCO3 ___

The temperature and pressure at which ice, liquid water and water vapour can exist together are

The number of ways in which 5A's and 6B's can be arranged to form a string of text which reads the same way backward and forward is

The rate of a first order reaction has been found to be 2.45×10−6molL−1s−1at concentration C1. The value of C1 is (rate constant = 3.5×10−5)

Differentiate between on-the-job training and off-the-job training.

Match the followingA) Thermal stability order of hydrides 1) Na > K >Rb> Li > CsB) Ionic nature of hydrides 2) Li > Na > K >Rb> CsC) I.P2 values order 3) CsH>RbH> KH >NaH>LiH D) Abundance decreasing order 4) LiH>NaH> KH >RbH>CsH

Why HF2- is present though HBr2-is not present?

Knowing that Na+>Mg2+ and S2−>Cl−, predict which compound will be the least soluble in a polar solvent?

2NaNO3 + 10Na → + N2 2NaNO2 + 6Na → + N2 The product obtained is as follows.