46295 + Interview Questions in Chemistry

1.	The cause of periodicity of properties is:
Answer» The cause of periodicity of properties is:

Discussion

2.	Ionic radii are [CBSE AIPMT 2004]
Answer» Ionic radii are [CBSE AIPMT 2004]

Discussion

3.	For a perfectly crystalline solid Vp,m = aT3 + bT, where a and b are constants. If Cp,m is 0.40 J/K nike at 10K and 092J/K mole at 20K, then molar entropy at 20K is:
Answer» For a perfectly crystalline solid $V_{p, m} = a T^{3} + b T$ , where $a$ and $b$ are constants. If $C_{p, m}$ is $0.40 J / K$ nike at $10 K$ and $092 J / K$ mole at $20 K$ , then molar entropy at $20 K$ is:

Discussion

4.	In which of the following solids, ions of opposite charges are held together by strong electrostatic forces of attraction?
Answer» In which of the following solids, ions of opposite charges are held together by strong electrostatic forces of attraction?

Discussion

5.	The process of separation of solid organic compounds is known as:
Answer» The process of separation of solid organic compounds is known as:

Discussion

6.	Name the gas that can readily decolourise acidified KMnO4 solution.
Answer» Name the gas that can readily decolourise acidified $K M n O_{4}$ solution.

Discussion

7.	The observed osmotic pressure of a solution of benzoic acid in benzene is less than its expected value because
Answer» The observed osmotic pressure of a solution of benzoic acid in benzene is less than its expected value because

Discussion

8.	Mass of an atom in an unit cell is calculated by which of the following formula if M is the molar mass:
Answer» Mass of an atom in an unit cell is calculated by which of the following formula if M is the molar mass:

Discussion

9.	Picture A shows the particles of a substance before and picture B shows the particles of the same substance after some time has passed. What leads to this observation?
Answer» Picture A shows the particles of a substance before and picture B shows the particles of the same substance after some time has passed. What leads to this observation?

9.

Picture A shows the particles of a substance before and picture B shows the particles of the same substance after some time has passed. What leads to this observation?

Answer»

Picture A shows the particles of a substance before and picture B shows the particles of the same substance after some time has passed.

What leads to this observation?

Discussion

10.	In a zero order reaction for every 10∘C rice of temperature, the rate is doubled. If the temperature is increased from 10∘C to 100∘C, the rate of the reaction will become:
Answer» In a zero order reaction for every $10^{\circ} C$ rice of temperature, the rate is doubled. If the temperature is increased from $10^{\circ} C$ to $100^{\circ} C$ , the rate of the reaction will become:

Discussion

11.	CaCO3→ΔX+CO2↑Carbon↓Δ furnaceYN2−−−−−−→Δ furnaceZ The number of lone pair electrons in the anion present in Z is ___
Answer» $C a C O_{3} \to Δ X + C O_{2} ↑ C a r b o n ↓ Δ f u r n a c e Y N_{2} - ----- \to Δ f u r n a c e Z$ The number of lone pair electrons in the anion present in Z is ___

Discussion

12.	Sulphur reacts with chlorine in 1:2 ratio and forms(X), X on hydrolysis gives a sulphur compound y. What is the hybridization state of central atom in the anion of Y?
Answer» Sulphur reacts with chlorine in 1:2 ratio and forms(X), X on hydrolysis gives a sulphur compound y. What is the hybridization state of central atom in the anion of Y?

Discussion

13.	Calculate the equilibrium constant for the reaction at 25 ºC.
Answer» Calculate the equilibrium constant for the reaction at 25 ºC.

13.

Calculate the equilibrium constant for the reaction at 25 ºC.

Answer»

Calculate the equilibrium constant for the reaction at 25 ºC.

Discussion

14.	Which of the following presents the correct order of the acidity in the given compounds?
Answer» Which of the following presents the correct order of the acidity in the given compounds?

Discussion

15.	Which of the following has three centre electron pair bond?
Answer» Which of the following has three centre electron pair bond?

Discussion

16.	If 1 L 1 M solution of sulphuric acid is diluted by 5 L of water, what will be the final normality of the solution?
Answer» If 1 L 1 M solution of sulphuric acid is diluted by 5 L of water, what will be the final normality of the solution?

Discussion

17.	Schemes 1 and 2 describe sequential transformation of alkynes M and N. Consider only the major products formed in each step for both schemes.
Answer» Schemes 1 and 2 describe sequential transformation of alkynes M and N. Consider only the major products formed in each step for both schemes.

Discussion

18.	What is formed when oxalic acid is dehydrated by conc.H2SO4.
Answer» What is formed when oxalic acid is dehydrated by conc. $H_{2} S O_{4}$ .

Discussion

19.	Which of the following compounds is insoluble even in hot concentrated H2SO4
Answer» Which of the following compounds is insoluble even in hot concentrated $H_{2} S O_{4}$

Discussion

20.	Which one of the following cyano complex would exhibit diamagnetic behaviour?
Answer» Which one of the following cyano complex would exhibit diamagnetic behaviour?

Discussion

21.	Identify X in the sequence:
Answer» Identify X in the sequence:

21.

Identify X in the sequence:

Answer»

Identify X in the sequence:

Discussion

22.	The unit of ionic product of water (Kw) is:
Answer» The unit of ionic product of water $(K_{w})$ is:

Discussion

23.	A metal (A) was dissolved in hot 1 : 1 HNO3 solution. The solution was evaporated and half white crystals of B are obtained. The solution of B gave a brick red precipitate with K2CrO4 and a yellow precipitate with KI. The metal when melted and cooled showed the phenomenon of spitting. To the solution of B, addition of NaOH gives a brown precipitate. The brown precipitate on strong heating gives
Answer» A metal (A) was dissolved in hot 1 : 1 $H N O_{3}$ solution. The solution was evaporated and half white crystals of B are obtained. The solution of B gave a brick red precipitate with $K_{2} C r O_{4}$ and a yellow precipitate with KI. The metal when melted and cooled showed the phenomenon of spitting. To the solution of B, addition of NaOH gives a brown precipitate. The brown precipitate on strong heating gives

23.

A metal (A) was dissolved in hot 1 : 1 HNO3 solution. The solution was evaporated and half white crystals of B are obtained. The solution of B gave a brick red precipitate with K2CrO4 and a yellow precipitate with KI. The metal when melted and cooled showed the phenomenon of spitting. To the solution of B, addition of NaOH gives a brown precipitate. The brown precipitate on strong heating gives

Answer»

A metal (A) was dissolved in hot 1 : 1 $H N O_{3}$ solution. The solution was evaporated and half white crystals of B are obtained. The solution of B gave a brick red precipitate with $K_{2} C r O_{4}$ and a yellow precipitate with KI. The metal when melted and cooled showed the phenomenon of spitting.

To the solution of B, addition of NaOH gives a brown precipitate. The brown precipitate on strong heating gives

Discussion

24.	Identify the nature of the compound (A).
Answer» Identify the nature of the compound (A).

Discussion

25.	Predict the product when given compound reacts with LiAlH4:
Answer» Predict the product when given compound reacts with $L i A l H_{4}$ :

Discussion

26.	Salvarsan is an arsenic-containing drug which was first used for the treatment of ........... (a) syphilis (b) typhoid (c) meningitis (d) dysentery
Answer» Salvarsan is an arsenic-containing drug which was first used for the treatment of ........... (a) syphilis (b) typhoid (c) meningitis (d) dysentery

Discussion

27.	Calculate the ph of 0.05m h2so4 solution
Answer» Calculate the ph of 0.05m h2so4 solution

Discussion

28.	Which pair of compounds has the highest and the least boiling point?
Answer» Which pair of compounds has the highest and the least boiling point?

Discussion

29.	The kinetic energy of an electron emitted when a radiation of frequency 1.0×1015 s−1 hits the metal is 2×10−19 J. Calculate the threshold frequency of the metal.
Answer» The kinetic energy of an electron emitted when a radiation of frequency $1.0 \times 10^{15} s^{- 1}$ hits the metal is $2 \times 10^{- 19} J$ . Calculate the threshold frequency of the metal.

Discussion

30.	Identify the INCORRECT statement.
Answer» Identify the INCORRECT statement.

Discussion

31.	Television signals on earth cannot be received at distances greater than 100 km from the transmission station. The reason behind this is that
Answer» Television signals on earth cannot be received at distances greater than 100 km from the transmission station. The reason behind this is that

Discussion

32.	The Bat Life: The diameter of the cylinder in which the helium gas is stored is 50 mm and the weight of a steel ball is 0.25 kg. If initially there were 4 steel balls and the piston was 100 mm from the base, what would be the final position of the piston after dislodging 1 steel ball? Consider that the helium in the canister has the same temperature initially and at the end.
Answer» The Bat Life: The diameter of the cylinder in which the helium gas is stored is 50 mm and the weight of a steel ball is 0.25 kg. If initially there were 4 steel balls and the piston was 100 mm from the base, what would be the final position of the piston after dislodging 1 steel ball? Consider that the helium in the canister has the same temperature initially and at the end.

32.

The Bat Life: The diameter of the cylinder in which the helium gas is stored is 50 mm and the weight of a steel ball is 0.25 kg. If initially there were 4 steel balls and the piston was 100 mm from the base, what would be the final position of the piston after dislodging 1 steel ball? Consider that the helium in the canister has the same temperature initially and at the end.

Answer»

The Bat Life: The diameter of the cylinder in which the helium gas is stored is 50 mm and the weight of a steel ball is 0.25 kg. If initially there were 4 steel balls and the piston was 100 mm from the base, what would be the final position of the piston after dislodging 1 steel ball? Consider that the helium in the canister has the same temperature initially and at the end.

Discussion

33.	Pyridine has 6 bonding ( π ) and 2 nonbonding electrons, which statement is true regarding resonance in pyridine?
Answer» Pyridine has 6 bonding ( $π$ ) and 2 nonbonding electrons, which statement is true regarding resonance in pyridine?

Discussion

34.	A physical quantity of the dimension of length that can be formed out of c, G ande24πε0 is [c is velocity of light, G is universal constant of gravitation and e is charge]
Answer» A physical quantity of the dimension of length that can be formed out of c, G and $\frac{e^{2}}{4 π ε_{0}}$ is [c is velocity of light, G is universal constant of gravitation and e is charge]

Discussion

35.	The solubility product of a sparingly soluble salt BaSO4 is 1.1×10−10 at 25oC . What will be the solubility of BaSO4 in presence of 0.02 M H2SO4 ? (assume complete dissociation of H2SO4)
Answer» The solubility product of a sparingly soluble salt $B a S O_{4}$ is $1.1 \times 10^{- 10}$ at $25^{o} C$ . What will be the solubility of $B a S O_{4}$ in presence of $0.02 M$ $H_{2} S O_{4}$ ? (assume complete dissociation of $H_{2} S O_{4})$

Discussion

36.	The solubility of Iodine in pure water is less than its solubility in potassium iodide solution, because
Answer» The solubility of Iodine in pure water is less than its solubility in potassium iodide solution, because

Discussion

37.	In sets a−d, only one of the set is incorrect regarding basic strength. Select it:
Answer» In sets $a - d$ , only one of the set is incorrect regarding basic strength. Select it:

Discussion

38.	Calculate the cell potential (Ecell) of the following cell at 298K. Ag(s)\|AgNO3(0.01 M)\|\|AgNO3(1.0 M)\|Ag(s)
Answer» Calculate the cell potential ( $E_{c e l l}$ ) of the following cell at $298 K$ . $A g (s) \| A g N O_{3} (0.01 M) \| \| A g N O_{3} (1.0 M) \| A g (s)$

Discussion

39.	Certain crystals produce electric signals on application of pressure. This phenomenon is called[BHU 2005]
Answer» Certain crystals produce electric signals on application of pressure. This phenomenon is called [BHU 2005]

39.

Certain crystals produce electric signals on application of pressure. This phenomenon is called[BHU 2005]

Answer»

Certain crystals produce electric signals on application of pressure. This phenomenon is called

[BHU 2005]

Discussion

40.	Find the magnitude of the standard electrode potential of MnO−4/MnO2. The standard electrode potentials of MnO−4/Mn2+=1.51 V and MnO2/Mn2+=1.23 V.
Answer» Find the magnitude of the standard electrode potential of $M n O_{4}^{-} / M n O_{2}$ . The standard electrode potentials of $M n O_{4}^{-} / M n^{2 +} = 1.51 V$ and $M n O_{2} / M n^{2 +} = 1.23 V$ .

Discussion

41.	Give the decreasing order of reactivity of the following alkyl halides in the Williamson’s reaction. i.(CH3)3C−CH2Br ii.ClCH2CH=CH2 iii.ClCH2CH2CH3 iv.BrCH2CH2CH3
Answer» Give the decreasing order of reactivity of the following alkyl halides in the Williamson’s reaction. $i . {(C H_{3})}_{3} C - C H_{2} B r$ $i i . C l C H_{2} C H = C H_{2}$ $i i i . C l C H_{2} C H_{2} C H_{3}$ $i v . B r C H_{2} C H_{2} C H_{3}$

Discussion

42.	Which of the following are functional isomers of?
Answer» Which of the following are functional isomers of?

42.

Which of the following are functional isomers of?

Answer»

Which of the following are functional isomers of?

Discussion

43.	B(mix)Conc.HI⟵((CH3)3C−O−CH3)anhyd.HI→A(mix)
Answer» $B (m i x) C o n c . H I ⟵ ((C H_{3})_{3} C - O - C H_{3}) a n h y d . H I \to A (m i x)$

Discussion

44.	Select the incorrect statement
Answer» Select the incorrect statement

Discussion

45.	An isotone of 7636Ge Ge is
Answer» An isotone of $_{36}^{76} G e$ Ge is

Discussion

46.	What is observed with respect to Kinetic energy when the intensity of the incident radiation is increased?
Answer» What is observed with respect to Kinetic energy when the intensity of the incident radiation is increased?

Discussion

47.	Which of the following hybridisation has highest percentage of s-character
Answer» Which of the following hybridisation has highest percentage of s-character

47.

Which of the following hybridisation has highest percentage of s-character

Answer»

Which of the following hybridisation has highest percentage of s-character

Discussion

48.	In the decomposition of H2O2 at 300 K the energy of activation was found to be 18 kcal/mol while it decreases to 6 kcal/mol when the decomposition was carried out in the presence of a catalyst at 300 K. It was found that the catalysed reaction was ey times faster than uncatalysed one. Then value of y is:
Answer» In the decomposition of $H_{2} O_{2}$ at 300 K the energy of activation was found to be 18 kcal/mol while it decreases to 6 kcal/mol when the decomposition was carried out in the presence of a catalyst at 300 K. It was found that the catalysed reaction was $e^{y}$ times faster than uncatalysed one. Then value of $y$ is:

Discussion

49.	Which of the following will not show geometrical isomerism?
Answer» Which of the following will not show geometrical isomerism?

Discussion

50.	0.3 g of an oxalate salt was dissolved in 100 mL solution. The solution required 90 mLof N20KMnO4 for complete oxidation. The percentage of oxalate ion in the salt is:
Answer» 0.3 g of an oxalate salt was dissolved in 100 mL solution. The solution required 90 mLof $\frac{N}{20} K M n O_{4}$ for complete oxidation. The percentage of oxalate ion in the salt is:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The cause of periodicity of properties is:

Ionic radii are [CBSE AIPMT 2004]

For a perfectly crystalline solid Vp,m = aT3 + bT, where a and b are constants. If Cp,m is 0.40 J/K nike at 10K and 092J/K mole at 20K, then molar entropy at 20K is:

In which of the following solids, ions of opposite charges are held together by strong electrostatic forces of attraction?

The process of separation of solid organic compounds is known as:

Name the gas that can readily decolourise acidified KMnO4 solution.

The observed osmotic pressure of a solution of benzoic acid in benzene is less than its expected value because

Mass of an atom in an unit cell is calculated by which of the following formula if M is the molar mass:

Picture A shows the particles of a substance before and picture B shows the particles of the same substance after some time has passed. What leads to this observation?

In a zero order reaction for every 10∘C rice of temperature, the rate is doubled. If the temperature is increased from 10∘C to 100∘C, the rate of the reaction will become:

CaCO3→ΔX+CO2↑Carbon↓Δ furnaceYN2−−−−−−→Δ furnaceZ The number of lone pair electrons in the anion present in Z is ___

Sulphur reacts with chlorine in 1:2 ratio and forms(X), X on hydrolysis gives a sulphur compound y. What is the hybridization state of central atom in the anion of Y?

Calculate the equilibrium constant for the reaction at 25 ºC.

Which of the following presents the correct order of the acidity in the given compounds?

Which of the following has three centre electron pair bond?

If 1 L 1 M solution of sulphuric acid is diluted by 5 L of water, what will be the final normality of the solution?

Schemes 1 and 2 describe sequential transformation of alkynes M and N. Consider only the major products formed in each step for both schemes.

What is formed when oxalic acid is dehydrated by conc.H2SO4.

Which of the following compounds is insoluble even in hot concentrated H2SO4

Which one of the following cyano complex would exhibit diamagnetic behaviour?

Identify X in the sequence:

The unit of ionic product of water (Kw) is:

Identify the nature of the compound (A).

Predict the product when given compound reacts with LiAlH4:

Salvarsan is an arsenic-containing drug which was first used for the treatment of ........... (a) syphilis (b) typhoid (c) meningitis (d) dysentery

Calculate the ph of 0.05m h2so4 solution

Which pair of compounds has the highest and the least boiling point?

The kinetic energy of an electron emitted when a radiation of frequency 1.0×1015 s−1 hits the metal is 2×10−19 J. Calculate the threshold frequency of the metal.

Identify the INCORRECT statement.

Television signals on earth cannot be received at distances greater than 100 km from the transmission station. The reason behind this is that

Pyridine has 6 bonding ( π ) and 2 nonbonding electrons, which statement is true regarding resonance in pyridine?

A physical quantity of the dimension of length that can be formed out of c, G ande24πε0 is [c is velocity of light, G is universal constant of gravitation and e is charge]

The solubility product of a sparingly soluble salt BaSO4​ is 1.1×10−10 at 25oC . What will be the solubility of BaSO4​ in presence of 0.02 M H2SO4 ? (assume complete dissociation of H2SO4)

The solubility of Iodine in pure water is less than its solubility in potassium iodide solution, because

In sets a−d, only one of the set is incorrect regarding basic strength. Select it:

Calculate the cell potential (Ecell) of the following cell at 298K. Ag(s)|AgNO3(0.01 M)||AgNO3(1.0 M)|Ag(s)

Certain crystals produce electric signals on application of pressure. This phenomenon is called[BHU 2005]

Find the magnitude of the standard electrode potential of MnO−4/MnO2. The standard electrode potentials of MnO−4/Mn2+=1.51 V and MnO2/Mn2+=1.23 V.

Give the decreasing order of reactivity of the following alkyl halides in the Williamson’s reaction. i.(CH3)3C−CH2Br ii.ClCH2CH=CH2 iii.ClCH2CH2CH3 iv.BrCH2CH2CH3

Which of the following are functional isomers of?

B(mix)Conc.HI⟵((CH3)3C−O−CH3)anhyd.HI→A(mix)

Select the incorrect statement

An isotone of 7636Ge Ge is

What is observed with respect to Kinetic energy when the intensity of the incident radiation is increased?

Which of the following hybridisation has highest percentage of s-character

Which of the following will not show geometrical isomerism?

0.3 g of an oxalate salt was dissolved in 100 mL solution. The solution required 90 mLof N20KMnO4 for complete oxidation. The percentage of oxalate ion in the salt is:

The solubility product of a sparingly soluble salt BaSO4 is 1.1×10−10 at 25oC . What will be the solubility of BaSO4 in presence of 0.02 M H2SO4 ? (assume complete dissociation of H2SO4)