46295 + Interview Questions in Chemistry

1.	The pH of a solution in which the [H+] = 0.01, is
Answer» The pH of a solution in which the $[H^{+}]$ = 0.01, is

Discussion

2.	Which of the following complexes has the highest negative energy change (ΔG)?
Answer» Which of the following complexes has the highest negative energy change ( $Δ G$ )?

Discussion

3.	The anhydride of Nitric acid is
Answer» The anhydride of Nitric acid is

Discussion

4.	Ethene when treated with Br2 in the presence of CCl4 which compound is formed
Answer» Ethene when treated with $B r_{2}$ in the presence of $C C l_{4}$ which compound is formed

Discussion

5.	CH2=CH2KMnO4−−−−−−−→KOH/H2OX Product ‘X’ in above reaction is
Answer» $C H_{2} = C H_{2} K M n O_{4} - ------ \to K O H / H_{2} O X$ Product ‘X’ in above reaction is

Discussion

6.	A sudden change from anaerobic to aerobic process produces
Answer» A sudden change from anaerobic to aerobic process produces

Discussion

7.	The equilibrium constant in a reversible reaction at a given temperature
Answer» The equilibrium constant in a reversible reaction at a given temperature

Discussion

8.	Which of the following substances acts as an oxidising as well as a reducing agent
Answer» Which of the following substances acts as an oxidising as well as a reducing agent

Discussion

9.	The correct statement(s) regarding defects in solids is / are
Answer» The correct statement(s) regarding defects in solids is / are

Discussion

10.	A white crystalline solid “X” gives following chemical tests: (i) it liberates CO2 with NaHCO3 (ii) It forms a coloured dye on diazotisation and coupling with β - napthol (iii) With Br2 water it forms white ppt of 2, 4, 6 – tribromo aniline. Then "X" can be :
Answer» A white crystalline solid “X” gives following chemical tests: (i) it liberates $C O_{2} w i t h N a H C O_{3}$ (ii) It forms a coloured dye on diazotisation and coupling with $β$ - napthol (iii) With $B r_{2}$ water it forms white ppt of 2, 4, 6 – tribromo aniline. Then "X" can be :

10.

A white crystalline solid “X” gives following chemical tests: (i) it liberates CO2 with NaHCO3 (ii) It forms a coloured dye on diazotisation and coupling with β - napthol (iii) With Br2 water it forms white ppt of 2, 4, 6 – tribromo aniline. Then "X" can be :

Answer»

A white crystalline solid “X” gives following chemical tests:

(i) it liberates $C O_{2} w i t h N a H C O_{3}$

(ii) It forms a coloured dye on diazotisation and coupling with $β$ - napthol

(iii) With $B r_{2}$ water it forms white ppt of 2, 4, 6 – tribromo aniline. Then "X" can be :

Discussion

11.	Hexagonal close packed arrangement of ions is described as[MP PMT 1994]
Answer» Hexagonal close packed arrangement of ions is described as [MP PMT 1994]

11.

Hexagonal close packed arrangement of ions is described as[MP PMT 1994]

Answer»

Hexagonal close packed arrangement of ions is described as

[MP PMT 1994]

Discussion

12.	S-S bond is not present in
Answer» S-S bond is not present in

Discussion

13.	I2 gets 5% dissociated into atoms when1.0 mole of I2(g) is introduced into an evacuated flask of 1 L capacity at 150K.The Kp for the reaction I2(g)⇌2I(g) at 150K is:
Answer» $I_{2}$ gets $5 %$ dissociated into atoms when1.0 mole of $I_{2} (g)$ is introduced into an evacuated flask of 1 L capacity at 150K.The $K_{p}$ for the reaction $I_{2} (g) ⇌ 2 I (g)$ at 150K is:

Discussion

14.	In the given transformation, which of the following is the most appropriate reagent?
Answer» In the given transformation, which of the following is the most appropriate reagent?

Discussion

15.	A gaseous mixture of propane and butane of volume 3 litre on complete combustion produces 11.0 litre CO2 under standard conditions of temperature and pressure. The ratio of volume of butane to propane is:
Answer» A gaseous mixture of propane and butane of volume $3$ litre on complete combustion produces $11.0$ litre $C O_{2}$ under standard conditions of temperature and pressure. The ratio of volume of butane to propane is:

Discussion

16.	The most characteristic reaction of aldehyde and ketones is nucleophilic addition to carbon oxygen double bond. Aldehyde and ketones are easily susceptible to nucleophilic addition because of structural features. The trigonal planar arrangement of groups around the carbonyl carbon atom means that the carbonyl carbon atom is relatively open to attack from above and below the plane of carbonyl group. The partial positive charge on the carbonyl atom means that it is especially susceptible to attack by a nucleophile Aldehyde reacts with 2∘ amines to form
Answer» The most characteristic reaction of aldehyde and ketones is nucleophilic addition to carbon oxygen double bond. Aldehyde and ketones are easily susceptible to nucleophilic addition because of structural features. The trigonal planar arrangement of groups around the carbonyl carbon atom means that the carbonyl carbon atom is relatively open to attack from above and below the plane of carbonyl group. The partial positive charge on the carbonyl atom means that it is especially susceptible to attack by a nucleophile Aldehyde reacts with $2^{\circ}$ amines to form

16.

The most characteristic reaction of aldehyde and ketones is nucleophilic addition to carbon oxygen double bond. Aldehyde and ketones are easily susceptible to nucleophilic addition because of structural features. The trigonal planar arrangement of groups around the carbonyl carbon atom means that the carbonyl carbon atom is relatively open to attack from above and below the plane of carbonyl group. The partial positive charge on the carbonyl atom means that it is especially susceptible to attack by a nucleophile Aldehyde reacts with 2∘ amines to form

Answer»

The most characteristic reaction of aldehyde and ketones is nucleophilic addition to carbon oxygen double bond. Aldehyde and ketones are easily susceptible to nucleophilic addition because of structural features. The trigonal planar arrangement of groups around the carbonyl carbon atom means that the carbonyl carbon atom is relatively open to attack from above and below the plane of carbonyl group. The partial positive charge on the carbonyl atom means that it is especially susceptible to attack by a nucleophile

Aldehyde reacts with $2^{\circ}$ amines to form

Discussion

17.	Number of π electrons in cyclobutadienyl anion (C4H4)−2 is?
Answer» Number of $^{π}$ electrons in cyclobutadienyl anion $(C_{4} H_{4})^{- 2}$ is?

17.

Number of π electrons in cyclobutadienyl anion (C4H4)−2 is?

Answer»

Number of $^{π}$ electrons in cyclobutadienyl anion $(C_{4} H_{4})^{- 2}$ is?

Discussion

18.	Write down the outermost electronic configurations of alkali metals. How will you justify their placement in group 1 of the periodic table?
Answer» Write down the outermost electronic configurations of alkali metals. How will you justify their placement in group 1 of the periodic table?

Discussion

19.	In the IUPAC name of the above compound, the locant position of Br is .
Answer» In the IUPAC name of the above compound, the locant position of $B r$ is .

Discussion

20.	The edge length of NaCl in the crystal is 552pm. If the ionic radius of Na+ is 95pm, what is the ionic radius of Cl− ?
Answer» The edge length of NaCl in the crystal is 552pm. If the ionic radius of $N a^{+}$ is 95pm, what is the ionic radius of $C l^{-}$ ?

Discussion

21.	Draw the structures of optical isomers of: [Cr(C2O4)3]3− [PtCl2(en2)]2+ [Cr(NH3)2Cl2(en)]+
Answer» Draw the structures of optical isomers of: ${[C r {(C_{2} O_{4})}_{3}]}_{3}^{3 -}$ ${[P t C l_{2} (e n_{2})]}_{2}^{2 +}$ $[C r {(N H_{3})}_{2} C l_{2} (e n)]^{+}$

21.

Draw the structures of optical isomers of: [Cr(C2O4)3]3− [PtCl2(en2)]2+ [Cr(NH3)2Cl2(en)]+

Answer»

Draw the structures of optical isomers of:
${[C r {(C_{2} O_{4})}_{3}]}_{3}^{3 -}$

${[P t C l_{2} (e n_{2})]}_{2}^{2 +}$

$[C r {(N H_{3})}_{2} C l_{2} (e n)]^{+}$

Discussion

22.	R−CH2−CH2−OH can be converted into R−CH2CH2COOH by the following sequence of steps:
Answer» $R - C H_{2} - C H_{2} - O H$ can be converted into $R - C H_{2} C H_{2} C O O H$ by the following sequence of steps:

Discussion

23.	Which of the following is more reactive towards addition of HCl?
Answer» Which of the following is more reactive towards addition of $H C l$ ?

Discussion

24.	The de-broglie wavelength of an electron accelerated by an electric potential of 'V' volts is given by (Given:me=9.1×10−31kg,e=1.6×10−19C,h=6.6×10−34J/s)
Answer» The de-broglie wavelength of an electron accelerated by an electric potential of 'V' volts is given by $(G i v e n : m_{e} = 9.1 \times 10^{- 31} k g, e = 1.6 \times 10^{- 19} C, h = 6.6 \times 10^{- 34} J / s)$

Discussion

25.	In the figure shown electromagnetic radiations of wavelength 200 nm are incident on the metallic plate A. The photo electrons are accelerated by a potential difference 10 V. These electrons strike another metal plate B from which electromagnetic radiations are emitted. The minimum wavelength of the emitted photons is 100 nm. The work function of the metal A is x eV, then the value of x+2.2 is (use hc=12400 eV ∘A)
Answer» In the figure shown electromagnetic radiations of wavelength $200 nm$ are incident on the metallic plate $A$ . The photo electrons are accelerated by a potential difference $10 V$ . These electrons strike another metal plate $B$ from which electromagnetic radiations are emitted. The minimum wavelength of the emitted photons is $100 nm$ . The work function of the metal $A$ is $x eV$ , then the value of $x + 2.2$ is (use $h c = 12400 eV \circ A$ )

Discussion

26.	Freon (dichlorodifluoro methane) is used [CPMT 1986; DPMT 1983; CBSE PMT 2001]
Answer» Freon (dichlorodifluoro methane) is used [CPMT 1986; DPMT 1983; CBSE PMT 2001]

26.

Freon (dichlorodifluoro methane) is used [CPMT 1986; DPMT 1983; CBSE PMT 2001]

Answer»

Freon (dichlorodifluoro methane) is used

[CPMT 1986; DPMT 1983; CBSE PMT 2001]

Discussion

27.	Avogadro’s number represents the number of atoms in
Answer» Avogadro’s number represents the number of atoms in

Discussion

28.	Which of the following is the Fischer projection of L – threonine (also known as 2S, 3R-2-amino- 3-hydroxy butanoic acid)?
Answer» Which of the following is the Fischer projection of L – threonine (also known as 2S, 3R-2-amino- 3-hydroxy butanoic acid)?

Discussion

29.	The ratio of velocity of an electron in a certain Bohr's orbit (nth orbit) of H-atom to the velocity of light is 1:550 . The wavenumber of radiation emitted when the electron jumps from the (n+1) to ground state: (Rydberg constant (RH)=109678 cm−1
Answer» The ratio of velocity of an electron in a certain Bohr's orbit ( $n^{t h}$ orbit) of H-atom to the velocity of light is $1 : 550$ . The wavenumber of radiation emitted when the electron jumps from the (n+1) to ground state: (Rydberg constant $(R_{H}) = 109678 c m^{- 1}$

Discussion

30.	For the reaction 3Br2 + 6OHΘ → 5BrΘ + BrO3Θ + 3H2O Equivalent weight of Br2 (Molecular weight M) is
Answer» For the reaction $3 {B r}_{2}$ + $6 {O H}^{Θ}$ $\to$ $5 {B r}^{Θ}$ + $B r {O_{3}}^{Θ}$ + $3 H_{2} O$ Equivalent weight of ${B r}_{2}$ (Molecular weight M) is

30.

For the reaction 3Br2 + 6OHΘ → 5BrΘ + BrO3Θ + 3H2O Equivalent weight of Br2 (Molecular weight M) is

Answer»

For the reaction

$3 {B r}_{2}$ + $6 {O H}^{Θ}$ $\to$ $5 {B r}^{Θ}$ + $B r {O_{3}}^{Θ}$ + $3 H_{2} O$

Equivalent weight of ${B r}_{2}$ (Molecular weight M) is

Discussion

31.	An aqueous solution contains 0.10 M H2S and 0.20 M HCl. If the equilibrium constants for the formation of HS−from H2S is 1.0×10−7 and that of S2− from HS− ions is 1.2×10−13, then the concentration of S2− ions in aqueous solution is:
Answer» An aqueous solution contains 0.10 M $H_{2} S$ and 0.20 M $H C l$ . If the equilibrium constants for the formation of $H S^{-}$ from $H_{2} S$ is $1.0 \times 10^{- 7}$ and that of $S^{2 -}$ from $H S^{-}$ ions is $1.2 \times 10^{- 13}$ , then the concentration of $S^{2 -}$ ions in aqueous solution is:

Discussion

32.	Blood red coloured solution is produced when ferric chloride solution is treated with:
Answer» Blood red coloured solution is produced when ferric chloride solution is treated with:

Discussion

33.	Aqueous CuSO4 is electrolyzed using Ag as anode and Cu as cathode, then product of electrolysis at anode and cathode are, respectively
Answer» Aqueous $C u S O_{4}$ is electrolyzed using $A g$ as anode and $C u$ as cathode, then product of electrolysis at anode and cathode are, respectively

Discussion

34.	For the gaseous reaction, the equilibrium constant is given: XeF6+H2O⇌XeOF4+2HF; K1 XeO4+XeF6⇌XeOF4+XeO3F2; K2 Then, the equilibrium constant for the reaction given below is: XeO4+2HF⇋XeO3F2+H2O
Answer» For the gaseous reaction, the equilibrium constant is given: $X e F_{6} + H_{2} O ⇌ X e O F_{4} + 2 H F; K_{1}$ $X e O_{4} + X e F_{6} ⇌ X e O F_{4} + X e O_{3} F_{2}; K_{2}$ Then, the equilibrium constant for the reaction given below is: $X e O_{4} + 2 H F ⇋ X e O_{3} F_{2} + H_{2} O$

Discussion

35.	An alpha active element has molar mass M and half life of τ. A large plate of thickness a is made from the radioactive element. Density of the plate is ρ. The number of alpha particles emitted in unit time from unit surface area of the plate is found to be 1xln(2)τaρNAM. Here, the value of x is (NA is Avogadro's number ).
Answer» An alpha active element has molar mass $M$ and half life of $τ$ . A large plate of thickness $a$ is made from the radioactive element. Density of the plate is $ρ$ . The number of alpha particles emitted in unit time from unit surface area of the plate is found to be $\frac{1}{x} \frac{l n (2)}{τ} \frac{a ρ N_{A}}{M}$ . Here, the value of $x$ is ( $N_{A}$ is Avogadro's number ).

Discussion

36.	The minimum number of waves made by a Bohr electron in an orbit of maximum magnetic quantum number +2:
Answer» The minimum number of waves made by a Bohr electron in an orbit of maximum magnetic quantum number $+ 2$ :

Discussion

37.	The correct orer of increasing ionistion energy for the given species is:
Answer» The correct orer of increasing ionistion energy for the given species is:

Discussion

38.	Can Toluene react with aqueous KOH solution to give benzyl alcohol as the product?
Answer» Can Toluene react with aqueous KOH solution to give benzyl alcohol as the product?

Discussion

39.	What volume of 6 M HCl and 2 M HCl should be mixed to get two litre of 3 M HCl?
Answer» What volume of 6 M HCl and 2 M HCl should be mixed to get two litre of 3 M HCl?

Discussion

40.	The weight of water in 1 litre of 2M NaCl solution of density 1.117 g/mL is
Answer» The weight of water in 1 litre of 2M NaCl solution of density 1.117 g/mL is

Discussion

41.	Two particles start moving from the same position on a circle of radius 20 cm with speed 40π m/s and 36π m/s respectively in the same direction. Find the time after which the particles will meet again.
Answer» Two particles start moving from the same position on a circle of radius 20 cm with speed $40 π m / s$ and $36 π m / s$ respectively in the same direction. Find the time after which the particles will meet again.

Discussion

42.	Which of the following is not considered as an inorganic antiseptic?
Answer» Which of the following is not considered as an inorganic antiseptic?

Discussion

43.	One atmosphere is numerically equal to approximately
Answer» One atmosphere is numerically equal to approximately

Discussion

44.	What is the major product of the following reaction sequence ?
Answer» What is the major product of the following reaction sequence ?

Discussion

45.	If a=−^i+^j+2^k, b=2^i−^j−^k then c=−2^i+^j+3^k, then the angle between 2a-c and a+b is:
Answer» If $a = -^i +^j + 2^k$ , $b = 2^i -^j -^k$ then $c = - 2^i +^j + 3^k$ , then the angle between 2a-c and a+b is:

Discussion

46.	The following is a partial redox equation: MnO−4+8H++xe−⟶Mn2++4H2O The value of the coefficient 'x' is:
Answer» The following is a partial redox equation: $M n O_{4}^{-} + 8 H^{+} + x e^{-} ⟶ M n^{2 +} + 4 H_{2} O$ The value of the coefficient 'x' is:

Discussion

47.	The oxidation State of central atom in the complex [Co(NH3)4ClNO2] is
Answer» The oxidation State of central atom in the complex $[C o (N H_{3}) 4 C l N O_{2}]$ is

Discussion

48.	The IUPAC name of the compound (CH3)2 CH CH2CH2Cl is?
Answer» The IUPAC name of the compound $(C H_{3})_{2} C H C H_{2} C H_{2} C l$ is?

Discussion

49.	Polarization is the distortion of the shape of an anion by an adjacently placed cation. Which of the following statements is correct
Answer» Polarization is the distortion of the shape of an anion by an adjacently placed cation. Which of the following statements is correct

Discussion

50.	In the manufacture of NaOH by electrolysis of an aqueous solution of sodium chloride, the cathode and anode are separated by using a diaphragm or slate partitions because-
Answer» In the manufacture of NaOH by electrolysis of an aqueous solution of sodium chloride, the cathode and anode are separated by using a diaphragm or slate partitions because-

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The pH of a solution in which the [H+] = 0.01, is

Which of the following complexes has the highest negative energy change (ΔG)?

The anhydride of Nitric acid is

Ethene when treated with Br2 in the presence of CCl4 which compound is formed

CH2=CH2KMnO4−−−−−−−→KOH/H2OX Product ‘X’ in above reaction is

A sudden change from anaerobic to aerobic process produces

The equilibrium constant in a reversible reaction at a given temperature

Which of the following substances acts as an oxidising as well as a reducing agent

The correct statement(s) regarding defects in solids is / are

A white crystalline solid “X” gives following chemical tests: (i) it liberates CO2 with NaHCO3 (ii) It forms a coloured dye on diazotisation and coupling with β - napthol (iii) With Br2 water it forms white ppt of 2, 4, 6 – tribromo aniline. Then "X" can be :

Hexagonal close packed arrangement of ions is described as[MP PMT 1994]

S-S bond is not present in

I2 gets 5% dissociated into atoms when1.0 mole of I2(g) is introduced into an evacuated flask of 1 L capacity at 150K.The Kp for the reaction I2(g)⇌2I(g) at 150K is:

In the given transformation, which of the following is the most appropriate reagent?

A gaseous mixture of propane and butane of volume 3 litre on complete combustion produces 11.0 litre CO2 under standard conditions of temperature and pressure. The ratio of volume of butane to propane is:

Number of π electrons in cyclobutadienyl anion (C4H4)−2 is?

Write down the outermost electronic configurations of alkali metals. How will you justify their placement in group 1 of the periodic table?

In the IUPAC name of the above compound, the locant position of Br is .

The edge length of NaCl in the crystal is 552pm. If the ionic radius of Na+ is 95pm, what is the ionic radius of Cl− ?

Draw the structures of optical isomers of: [Cr(C2O4)3]3− [PtCl2(en2)]2+ [Cr(NH3)2Cl2(en)]+

R−CH2−CH2−OH can be converted into R−CH2CH2COOH by the following sequence of steps:

Which of the following is more reactive towards addition of HCl?

The de-broglie wavelength of an electron accelerated by an electric potential of 'V' volts is given by (Given:me=9.1×10−31kg,e=1.6×10−19C,h=6.6×10−34J/s)

Freon (dichlorodifluoro methane) is used [CPMT 1986; DPMT 1983; CBSE PMT 2001]

Avogadro’s number represents the number of atoms in

Which of the following is the Fischer projection of L – threonine (also known as 2S, 3R-2-amino- 3-hydroxy butanoic acid)?

The ratio of velocity of an electron in a certain Bohr's orbit (nth orbit) of H-atom to the velocity of light is 1:550 . The wavenumber of radiation emitted when the electron jumps from the (n+1) to ground state: (Rydberg constant (RH)=109678 cm−1

For the reaction 3Br2 + 6OHΘ → 5BrΘ + BrO3Θ + 3H2O Equivalent weight of Br2 (Molecular weight M) is

An aqueous solution contains 0.10 M H2S and 0.20 M HCl. If the equilibrium constants for the formation of HS−from H2S is 1.0×10−7 and that of S2− from HS− ions is 1.2×10−13, then the concentration of S2− ions in aqueous solution is:

Blood red coloured solution is produced when ferric chloride solution is treated with:

Aqueous CuSO4 is electrolyzed using Ag as anode and Cu as cathode, then product of electrolysis at anode and cathode are, respectively

For the gaseous reaction, the equilibrium constant is given: XeF6+H2O⇌XeOF4+2HF; K1 XeO4+XeF6⇌XeOF4+XeO3F2; K2 Then, the equilibrium constant for the reaction given below is: XeO4+2HF⇋XeO3F2+H2O

The minimum number of waves made by a Bohr electron in an orbit of maximum magnetic quantum number +2:

The correct orer of increasing ionistion energy for the given species is:

Can Toluene react with aqueous KOH solution to give benzyl alcohol as the product?

What volume of 6 M HCl and 2 M HCl should be mixed to get two litre of 3 M HCl?

The weight of water in 1 litre of 2M NaCl solution of density 1.117 g/mL is

Two particles start moving from the same position on a circle of radius 20 cm with speed 40π m/s and 36π m/s respectively in the same direction. Find the time after which the particles will meet again.

Which of the following is not considered as an inorganic antiseptic?

One atmosphere is numerically equal to approximately

What is the major product of the following reaction sequence ?

If a=−^i+^j+2^k, b=2^i−^j−^k then c=−2^i+^j+3^k, then the angle between 2a-c and a+b is:

The following is a partial redox equation: MnO−4+8H++xe−⟶Mn2++4H2O The value of the coefficient 'x' is:

The oxidation State of central atom in the complex [Co(NH3)4ClNO2] is

The IUPAC name of the compound (CH3)2 CH CH2CH2Cl is?

Polarization is the distortion of the shape of an anion by an adjacently placed cation. Which of the following statements is correct

In the manufacture of NaOH by electrolysis of an aqueous solution of sodium chloride, the cathode and anode are separated by using a diaphragm or slate partitions because-