46295 + Interview Questions in Chemistry

1.	How do antiseptics differ from disinfectants ? Give one example of each.
Answer» How do antiseptics differ from disinfectants ? Give one example of each.

Discussion

2.	The work done by 200 calorie of heat in isothermal expansion of ideal gas is:
Answer» The work done by $200 c a l o r i e$ of heat in isothermal expansion of ideal gas is:

Discussion

3.	A film of soap solution is trapped between a vertical frame and a light wire ab of length 0.1 m. If g=10 ms−2 and σ=25×10−3 Nm−2, then the load W that should be suspended from the wire to keep it in equilibrium is
Answer» A film of soap solution is trapped between a vertical frame and a light wire ab of length 0.1 m. If $g = 10 m s^{- 2}$ and $σ = 25 \times 10^{- 3} N m^{- 2}$ , then the load W that should be suspended from the wire to keep it in equilibrium is

3.

A film of soap solution is trapped between a vertical frame and a light wire ab of length 0.1 m. If g=10 ms−2 and σ=25×10−3 Nm−2, then the load W that should be suspended from the wire to keep it in equilibrium is

Answer»

A film of soap solution is trapped between a vertical frame and a light wire ab of length 0.1 m. If $g = 10 m s^{- 2}$ and $σ = 25 \times 10^{- 3} N m^{- 2}$ , then the load W that should be suspended from the wire to keep it in equilibrium is

Discussion

4.	If radius of the 13Al27 nucleus is taken to be RA. Then the radius of 53Te125 nucleus is nearly:
Answer» If radius of the $_{13}$ ${A l}^{27}$ nucleus is taken to be $R_{A}$ . Then the radius of $_{53}$ ${T e}^{125}$ nucleus is nearly:

Discussion

5.	Discuss the main purpose of vulcanization of rubber.
Answer» Discuss the main purpose of vulcanization of rubber.

Discussion

6.	1.520 g of a hydroxide of a metal on ignition gave 0.995 g of an oxide of the same metal. The equivalent weight of the metal is _______.
Answer» $1.520 g$ of a hydroxide of a metal on ignition gave $0.995 g$ of an oxide of the same metal. The equivalent weight of the metal is _______.

Discussion

7.	The solubility in water of a sparingly soluble salt AB2 is 1.0 × 10−5 mol l−1. Its solubility product number will be
Answer» The solubility in water of a sparingly soluble salt $A B_{2}$ is $1.0 \times 10^{- 5} m o l l^{- 1}$ . Its solubility product number will be

7.

The solubility in water of a sparingly soluble salt AB2 is 1.0 × 10−5 mol l−1. Its solubility product number will be

Answer»

The solubility in water of a sparingly soluble salt $A B_{2}$ is $1.0 \times 10^{- 5} m o l l^{- 1}$ . Its

solubility product number will be

Discussion

8.	A solution of acetone in heptane has a mole fraction 0.2. Its density 0.92 g/mL. Then the product of molality and molarity is
Answer» A solution of acetone in heptane has a mole fraction 0.2. Its density 0.92 g/mL. Then the product of molality and molarity is

Discussion

9.	Which of the following has net dipole moment?
Answer» Which of the following has net dipole moment?

Discussion

10.	In a saturated solution,heat flows and more of the solute is added.Is it possible to add more solute?What will happen if the solution gets cool down?Why is it possible? Solution-water+sugar; solute-sugar; solvent-water
Answer» In a saturated solution,heat flows and more of the solute is added.Is it possible to add more solute?What will happen if the solution gets cool down?Why is it possible? Solution-water+sugar; solute-sugar; solvent-water

Discussion

11.	The vapour density of N2O5 is
Answer» The vapour density of $N_{2} O_{5}$ is

Discussion

12.	Explain nearest neighbour in NaCl (1st and 2nd and 3rd nearest neighbours) Personal doubt- I am not able to upload image it says url missing
Answer» Explain nearest neighbour in NaCl (1st and 2nd and 3rd nearest neighbours) Personal doubt- I am not able to upload image it says url missing

12.

Explain nearest neighbour in NaCl (1st and 2nd and 3rd nearest neighbours) Personal doubt- I am not able to upload image it says url missing

Answer»

Explain nearest neighbour in NaCl

(1st and 2nd and 3rd nearest neighbours)

Personal doubt- I am not able to upload image it says url missing

Discussion

13.	Define a function as a set of ordered pairs
Answer» Define a function as a set of ordered pairs

Discussion

14.	Are there any trick's to write mass number of elements from 1to 30
Answer» Are there any trick's to write mass number of elements from 1to 30

Discussion

15.	Consider the statement (a) melanin is a non haemoglobin pigment secreted by melanocytes (b) melanocytes possess a non essential amino acid called tyrosine which is correct (1) a only (2) b only (3) both a and b (4) none
Answer» Consider the statement (a) melanin is a non haemoglobin pigment secreted by melanocytes (b) melanocytes possess a non essential amino acid called tyrosine which is correct (1) a only (2) b only (3) both a and b (4) none

Discussion

16.	How to prepare for kvpy?
Answer» How to prepare for kvpy?

Discussion

17.	How much water should be added in 3M, 100 ml H2SO4 solution to make it 2N solution?
Answer» How much water should be added in 3M, 100 ml $H_{2} S O_{4}$ solution to make it 2N solution?

Discussion

18.	How phenols can be obtained from benzene diazonium chloride?
Answer» How phenols can be obtained from benzene diazonium chloride?

Discussion

19.	Which of the following compound will have the least energy for ionisation of Cl as Cl−
Answer» Which of the following compound will have the least energy for ionisation of Cl as $C l^{-}$

Discussion

20.	Equal weights of methane and oxygen are mixed in an empty container at 25∘ C. The fraction of total pressure exerted by oxygen is:
Answer» Equal weights of methane and oxygen are mixed in an empty container at $25^{\circ} C$ . The fraction of total pressure exerted by oxygen is:

Discussion

21.	Which of the following oxides is not expected to react with sodium hydroxide? [CBSE AIPMT 2009]
Answer» Which of the following oxides is not expected to react with sodium hydroxide? [CBSE AIPMT 2009]

Discussion

22.	Which of the following is a fully fluorinated polymer?
Answer» Which of the following is a fully fluorinated polymer?

Discussion

23.	The electric charge on one electron is 1.602 * 10-¹9 C. How much charge is present on 0.1 mole of Cu²+ ions?
Answer» The electric charge on one electron is 1.602 * 10-¹9 C. How much charge is present on 0.1 mole of Cu²+ ions?

Discussion

24.	Green chemistry means
Answer» Green chemistry means

Discussion

25.	Which among the following is known as the point of temperature inversion?
Answer» Which among the following is known as the point of temperature inversion?

Discussion

26.	What is the energy in joules, required to shift the electron of the hydrogen atom from the first Bohr orbit to the fifth Bohr orbit and what is the wavelength of the light emitted when the electron returns to the ground state? The ground state electron energy is –2.18 × 10–11 ergs.
Answer» What is the energy in joules, required to shift the electron of the hydrogen atom from the first Bohr orbit to the fifth Bohr orbit and what is the wavelength of the light emitted when the electron returns to the ground state? The ground state electron energy is –2.18 × $10^{- 11}$ ergs.

Discussion

27.	The increasing order of atomic radii of group 13 elements is:
Answer» The increasing order of atomic radii of group 13 elements is:

Discussion

28.	Which is the strongest acid in the following?
Answer» Which is the strongest acid in the following?

Discussion

29.	How do we calculate the oxidation number of polyatomic ion?
Answer» How do we calculate the oxidation number of polyatomic ion?

29.

How do we calculate the oxidation number of polyatomic ion?

Answer»

How do we calculate the oxidation number of polyatomic ion?

Discussion

30.	Entropy change when 4 moles of an ideal gas expands reversibly from an initial volume of 1 dm3 to a final volume of 10 dm3 at a constant temperature of 298 K is
Answer» Entropy change when 4 moles of an ideal gas expands reversibly from an initial volume of 1 $d m^{3}$ to a final volume of 10 $d m^{3}$ at a constant temperature of 298 K is

Discussion

31.	What will be the value of compressibility factor (Z) for an ideal gas?
Answer» What will be the value of compressibility factor $(Z)$ for an ideal gas?

Discussion

32.	Shown below is the cathode ray tube experimental setup.The green glow as shown is due to which material?
Answer» Shown below is the cathode ray tube experimental setup.The green glow as shown is due to which material?

Discussion

33.	What is Q in equilibrium
Answer» What is Q in equilibrium

Discussion

34.	Total no. of reactions in which disproportion will occur.___ (i) NO2+H2O→ (ii) Zn+Conc.HNO3→ (iii) White P4+NaOH→ (iv) HCHO+NaOHCannizaro reaction−−−−−−−−−−−−→ (v) FeSO4+NO−3+H2SO4→ (vi) P4+SOCl2→ (vii) H3PO3Δ−→ (viii) I−+S2O2−8→ (ix) MnO2−4H+−−→ (x) HNO2Δ−→
Answer» Total no. of reactions in which disproportion will occur.___ (i) $N O_{2} + H_{2} O \to$ (ii) $Z n + C o n c . H N O_{3} \to$ (iii) White $P_{4} + N a O H \to$ (iv) $H C H O + N a O H C a n n i z a r o r e a c t i o n - ----------- \to$ (v) $F e S O_{4} + N O_{3}^{-} + H_{2} S O_{4} \to$ (vi) $P_{4} + S O C l_{2} \to$ (vii) $H_{3} P O_{3} Δ - \to$ (viii) $I^{-} + S_{2} O_{8}^{2 -} \to$ (ix) $M n O_{4}^{2 -} H^{+} - - \to$ (x) $H N O_{2} Δ - \to$

34.

Total no. of reactions in which disproportion will occur.___ (i) NO2+H2O→ (ii) Zn+Conc.HNO3→ (iii) White P4+NaOH→ (iv) HCHO+NaOHCannizaro reaction−−−−−−−−−−−−→ (v) FeSO4+NO−3+H2SO4→ (vi) P4+SOCl2→ (vii) H3PO3Δ−→ (viii) I−+S2O2−8→ (ix) MnO2−4H+−−→ (x) HNO2Δ−→

Answer»

Total no. of reactions in which disproportion will occur.___

(i) $N O_{2} + H_{2} O \to$ (ii) $Z n + C o n c . H N O_{3} \to$ (iii) White $P_{4} + N a O H \to$
(iv) $H C H O + N a O H C a n n i z a r o r e a c t i o n - ----------- \to$ (v) $F e S O_{4} + N O_{3}^{-} + H_{2} S O_{4} \to$ (vi) $P_{4} + S O C l_{2} \to$
(vii) $H_{3} P O_{3} Δ - \to$ (viii) $I^{-} + S_{2} O_{8}^{2 -} \to$ (ix) $M n O_{4}^{2 -} H^{+} - - \to$ (x) $H N O_{2} Δ - \to$

Discussion

35.	Naphthalene is a/an
Answer» Naphthalene is a/an

35.

Naphthalene is a/an

Answer»

Naphthalene is a/an

Discussion

36.	Among KO2,AlO2−,BaO2 and NO+2 unpaired electron is present in
Answer» Among $K O_{2}, A l O_{2^{-}}, B a O_{2}$ and $N O_{2}^{+}$ unpaired electron is present in

Discussion

37.	Strong oxidizing agents like acidified potassium dichromate convert alcohols directly to:
Answer» Strong oxidizing agents like acidified potassium dichromate convert alcohols directly to:

Discussion

38.	An alkybromide(A) On treatment with Na and ether gives a hydrocarbon (B). (B) on treatment with HBr and peroxide gives Br−(CH2)6−Br compound (A) is
Answer» An alkybromide(A) On treatment with Na and ether gives a hydrocarbon (B). (B) on treatment with HBr and peroxide gives $B r - (C H_{2})_{6} - B r$ compound (A) is

Discussion

39.	Proteins are built up of [CPMT 1981, 99; BHU 1987; CBSE PMT 2001; MP PMT 1987, 96; KCET 1984]
Answer» Proteins are built up of [CPMT 1981, 99; BHU 1987; CBSE PMT 2001; MP PMT 1987, 96; KCET 1984]

39.

Proteins are built up of [CPMT 1981, 99; BHU 1987; CBSE PMT 2001; MP PMT 1987, 96; KCET 1984]

Answer»

Proteins are built up of

[CPMT 1981, 99; BHU 1987; CBSE PMT 2001;

MP PMT 1987, 96; KCET 1984]

Discussion

40.	How many unit cells are present in a cube-shaped ideal crystal of NaCl of mass 1.00 g [Atomic masses: Na=23, Cl=35.5] [AIEEE 2003]
Answer» How many unit cells are present in a cube-shaped ideal crystal of NaCl of mass 1.00 g [Atomic masses: Na=23, Cl=35.5] [AIEEE 2003]

40.

How many unit cells are present in a cube-shaped ideal crystal of NaCl of mass 1.00 g [Atomic masses: Na=23, Cl=35.5] [AIEEE 2003]

Answer»

How many unit cells are present in a cube-shaped ideal crystal of NaCl of mass 1.00 g [Atomic masses: Na=23, Cl=35.5]

[AIEEE 2003]

Discussion

41.	Electrophiles are
Answer» Electrophiles are

Discussion

42.	The correct set of quantum number for the unpaired electrons of chlorine atom is:
Answer» The correct set of quantum number for the unpaired electrons of chlorine atom is:

Discussion

43.	Benzaldehyde reacts with ammonia to give
Answer» Benzaldehyde reacts with ammonia to give

Discussion

44.	When CuSO4 is treated with excess KCN solution, what compound(s) is/are formed?
Answer» When $C u S O_{4}$ is treated with excess KCN solution, what compound(s) is/are formed?

Discussion

45.	The value of 200 lb in kilograms is
Answer» The value of $200 l b$ in kilograms is

Discussion

46.	For a consecutive reaction R1k1−→R2 R1k2−→R3 If initial concentration of R1 is 100 M and k1:k2=1:0.15 the value of [R2]max is [Given:k1=4.0×10−2min−1]
Answer» For a consecutive reaction $R_{1} k_{1} - \to R_{2} R_{1} k_{2} - \to R_{3}$ If initial concentration of $R_{1}$ is 100 M and $k_{1} : k_{2} = 1 : 0.15$ the value of $[R_{2}]_{m a x}$ is $[G i v e n : k_{1} = 4.0 \times 10^{- 2} m i n^{- 1}]$

Discussion

47.	Which halide is least stable and has doubtful existence ?
Answer» Which halide is least stable and has doubtful existence ?

Discussion

48.	Two moles of an ideal gas (Cv=52R) was compressed adiabatically against constant pressure of 4 atm . Which was initially at 350 K and 1 atm pressure. The work involve in the process is equal to
Answer» Two moles of an ideal gas $(C_{v} = \frac{5}{2} R)$ was compressed adiabatically against constant pressure of $4 a t m$ . Which was initially at $350 K$ and $1 a t m$ pressure. The work involve in the process is equal to

Discussion

49.	The basic ionisation constant for hydrazine, N2H4 is 9.6×10−7. What would be the percentage hydrolysis of 0.1M N2H5Cl ? (Given:√10.4≈3.2 and √1.04=1.013)
Answer» The basic ionisation constant for hydrazine, $N_{2} H_{4}$ is $9.6 \times 10^{- 7}$ . What would be the percentage hydrolysis of $0.1 M N_{2} H_{5} C l$ ? $(G i v e n : \sqrt{10.4} \approx 3.2 a n d \sqrt{1.04} = 1.013)$

Discussion

50.	Which of the following molcules has a linear shape?
Answer» Which of the following molcules has a linear shape?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

How do antiseptics differ from disinfectants ? Give one example of each.

The work done by 200 calorie of heat in isothermal expansion of ideal gas is:

A film of soap solution is trapped between a vertical frame and a light wire ab of length 0.1 m. If g=10 ms−2 and σ=25×10−3 Nm−2, then the load W that should be suspended from the wire to keep it in equilibrium is

If radius of the 13Al27 nucleus is taken to be RA. Then the radius of 53Te125 nucleus is nearly:

Discuss the main purpose of vulcanization of rubber.

1.520 g of a hydroxide of a metal on ignition gave 0.995 g of an oxide of the same metal. The equivalent weight of the metal is _______.

The solubility in water of a sparingly soluble salt AB2 is 1.0 × 10−5 mol l−1. Its solubility product number will be

A solution of acetone in heptane has a mole fraction 0.2. Its density 0.92 g/mL. Then the product of molality and molarity is

Which of the following has net dipole moment?

In a saturated solution,heat flows and more of the solute is added.Is it possible to add more solute?What will happen if the solution gets cool down?Why is it possible? Solution-water+sugar; solute-sugar; solvent-water

The vapour density of N2O5 is

Explain nearest neighbour in NaCl (1st and 2nd and 3rd nearest neighbours) Personal doubt- I am not able to upload image it says url missing

Define a function as a set of ordered pairs

Are there any trick's to write mass number of elements from 1to 30

Consider the statement (a) melanin is a non haemoglobin pigment secreted by melanocytes (b) melanocytes possess a non essential amino acid called tyrosine which is correct (1) a only (2) b only (3) both a and b (4) none

How to prepare for kvpy?

How much water should be added in 3M, 100 ml H2SO4 solution to make it 2N solution?

How phenols can be obtained from benzene diazonium chloride?

Which of the following compound will have the least energy for ionisation of Cl as Cl−

Equal weights of methane and oxygen are mixed in an empty container at 25∘ C. The fraction of total pressure exerted by oxygen is:

Which of the following oxides is not expected to react with sodium hydroxide? [CBSE AIPMT 2009]

Which of the following is a fully fluorinated polymer?

The electric charge on one electron is 1.602 * 10-¹9 C. How much charge is present on 0.1 mole of Cu²+ ions?

Green chemistry means

Which among the following is known as the point of temperature inversion?

What is the energy in joules, required to shift the electron of the hydrogen atom from the first Bohr orbit to the fifth Bohr orbit and what is the wavelength of the light emitted when the electron returns to the ground state? The ground state electron energy is –2.18 × 10–11 ergs.

The increasing order of atomic radii of group 13 elements is:

Which is the strongest acid in the following?

How do we calculate the oxidation number of polyatomic ion?

Entropy change when 4 moles of an ideal gas expands reversibly from an initial volume of 1 dm3 to a final volume of 10 dm3 at a constant temperature of 298 K is

What will be the value of compressibility factor (Z) for an ideal gas?

Shown below is the cathode ray tube experimental setup.The green glow as shown is due to which material?

What is Q in equilibrium

Naphthalene is a/an

Among KO2,AlO2−,BaO2 and NO+2 unpaired electron is present in

Strong oxidizing agents like acidified potassium dichromate convert alcohols directly to:

An alkybromide(A) On treatment with Na and ether gives a hydrocarbon (B). (B) on treatment with HBr and peroxide gives Br−(CH2)6−Br compound (A) is

Proteins are built up of [CPMT 1981, 99; BHU 1987; CBSE PMT 2001; MP PMT 1987, 96; KCET 1984]

How many unit cells are present in a cube-shaped ideal crystal of NaCl of mass 1.00 g [Atomic masses: Na=23, Cl=35.5] [AIEEE 2003]

Electrophiles are

The correct set of quantum number for the unpaired electrons of chlorine atom is:

Benzaldehyde reacts with ammonia to give

When CuSO4 is treated with excess KCN solution, what compound(s) is/are formed?

The value of 200 lb in kilograms is

For a consecutive reaction R1k1−→R2 R1k2−→R3 If initial concentration of R1 is 100 M and k1:k2=1:0.15 the value of [R2]max is [Given:k1=4.0×10−2min−1]

Which halide is least stable and has doubtful existence ?

Two moles of an ideal gas (Cv=52R) was compressed adiabatically against constant pressure of 4 atm . Which was initially at 350 K and 1 atm pressure. The work involve in the process is equal to

The basic ionisation constant for hydrazine, N2H4 is 9.6×10−7. What would be the percentage hydrolysis of 0.1M N2H5Cl ? (Given:√10.4≈3.2 and √1.04=1.013)

Which of the following molcules has a linear shape?