46295 + Interview Questions in Chemistry

1.	The micronutrient, molybdenum, is important
Answer» The micronutrient, molybdenum, is important

Discussion

2.	Which of the following is not the product of dehydration of the given compound?
Answer» Which of the following is not the product of dehydration of the given compound?

Discussion

3.	Which of the following has the highest Nucleophilicity?
Answer» Which of the following has the highest Nucleophilicity?

Discussion

4.	The products formed by the ozonolysis of an olefin 'X' in the following equation
Answer» The products formed by the ozonolysis of an olefin 'X' in the following equation

4.

The products formed by the ozonolysis of an olefin 'X' in the following equation

Answer»

The products formed by the ozonolysis of an olefin 'X' in the following equation

Discussion

5.	Which of the following pairs of d-orbitals have electron density along the axes ?
Answer» Which of the following pairs of d-orbitals have electron density along the axes ?

Discussion

6.	After 2hours, one-sixteenth of the starting amount of a certain radioactive isotope remained undecayed.The half-life of the isotope is
Answer» After 2hours, one-sixteenth of the starting amount of a certain radioactive isotope remained undecayed.The half-life of the isotope is

Discussion

7.	Which of the following is true structure of H2O2?
Answer» Which of the following is true structure of $H_{2} O_{2}$ ?

Discussion

8.	C8H6O4Δ−→XNH3−−−→Y The compound X is
Answer» $C_{8} H_{6} O_{4} Δ - \to X N H_{3} - -- \to Y$ The compound X is

8.

C8H6O4Δ−→XNH3−−−→Y The compound X is

Answer»

$C_{8} H_{6} O_{4} Δ - \to X N H_{3} - -- \to Y$

The compound X is

Discussion

9.	Amongst the compounds given, the one that would form a brilliant coloured dye on treatment with NaNO2 in dil. HCl followed by addition to an alkaline solution of β-naphthol is :
Answer» Amongst the compounds given, the one that would form a brilliant coloured dye on treatment with $N a N O_{2}$ in dil. HCl followed by addition to an alkaline solution of β-naphthol is :

Discussion

10.	What products are expected from the disproportionation reaction of hypochlorous acid?
Answer» What products are expected from the disproportionation reaction of hypochlorous acid?

Discussion

11.	The enolic form of acetone contains
Answer» The enolic form of acetone contains

11.

The enolic form of acetone contains

Answer»

The enolic form of acetone contains

Discussion

12.	Iodine reacts with hypo to give:
Answer» Iodine reacts with hypo to give:

Discussion

13.	A monochromatic source of light operating at 198 W emits 4×1020 photons per second. Find the wavelength of light in nm.(Take h=6.6×10−34 Js)
Answer» A monochromatic source of light operating at 198 W emits $4 \times 10^{20}$ photons per second. Find the wavelength of light in nm.(Take $h = 6.6 \times 10^{- 34} J s$ )

Discussion

14.	If two moles of KMnO4 oxidises 3 moles of Mx+ to MO−3 in neutral medium. Find the value of x.
Answer» If two moles of $K M n O_{4}$ oxidises $3$ moles of $M^{x +}$ to $M O_{3}^{-}$ in neutral medium. Find the value of $x$ .

Discussion

15.	The size of the species I,I− & I+ follows the order:
Answer» The size of the species $I, I^{-}$ & $I^{+}$ follows the order:

Discussion

16.	The reaction is faster when X is :
Answer» The reaction is faster when X is :

Discussion

17.	For oxidizing alcohols, several oxidants – each with a multivalent central atom as the active species – can be used. When NaOCl, with Cl as the multivalent atom is used, how many bonds to oxygen atoms does each central multivalent atom have just before and immediately after the oxidation respectively?
Answer» For oxidizing alcohols, several oxidants – each with a multivalent central atom as the active species – can be used. When $N a O C l$ , with Cl as the multivalent atom is used, how many bonds to oxygen atoms does each central multivalent atom have just before and immediately after the oxidation respectively?

Discussion

18.	Which of the following ion will have minimum flocculation value for ferric oxide sol?
Answer» Which of the following ion will have minimum flocculation value for ferric oxide sol?

Discussion

19.	QUESTION 2.17 The vapour pressure of water is 12.3 kPa at 300 K. Calculate vapour pressure of 1 molal solution of a non-volatile solute in it.
Answer» QUESTION 2.17 The vapour pressure of water is 12.3 kPa at 300 K. Calculate vapour pressure of 1 molal solution of a non-volatile solute in it.

19.

QUESTION 2.17 The vapour pressure of water is 12.3 kPa at 300 K. Calculate vapour pressure of 1 molal solution of a non-volatile solute in it.

Answer»

QUESTION 2.17

The vapour pressure of water is 12.3 kPa at 300 K. Calculate vapour pressure of 1 molal solution of a non-volatile solute in it.

Discussion

20.	2.5 mL of 25 M weak monoacidic base (Kb=1×10−12) at 25o C is titrated with 215 M HCl in water at 25oC. The concentration of H+ at equivalence points is (Kw=1×10−14 at 25o C)
Answer» $2.5 m L$ of $\frac{2}{5} M$ weak monoacidic base $(K_{b} = 1 \times 10^{- 12})$ at $25^{o} C$ is titrated with $\frac{2}{15} M$ $H C l$ in water at $25^{o} C .$ The concentration of $H^{+}$ at equivalence points is $(K_{w} = 1 \times 10^{- 14} a t 25^{o} C)$

Discussion

21.	What is the meaning of following line: in crystalline solids same physical property is found to be different along different direction
Answer» What is the meaning of following line: in crystalline solids same physical property is found to be different along different direction

Discussion

22.	Match the following:
Answer» Match the following:

Discussion

23.	What is the volume strength of 1.5 N H2O2 solution?
Answer» What is the volume strength of 1.5 N $H_{2} O_{2}$ solution?

Discussion

24.	In the given conversion, the best yield will be obtained with:
Answer» In the given conversion, the best yield will be obtained with:

Discussion

25.	A 50 mL solution of 0.2 M CH3COOH is titrated with 0.2 M NaOH. Find the pH of solution when: (a) 0 mL NaOH is added (pHinitial) (b) 10 mL of NaOH has been added (pH10mL) Given: Ka(CH3COOH)=1.8×10−5
Answer» A $50 m L$ solution of $0.2 M C H_{3} C O O H$ is titrated with $0.2 M N a O H$ . Find the $p H$ of solution when: (a) $0 m L N a O H$ is added ( $p H_{i n i t i a l}$ ) (b) $10 m L$ of $N a O H$ has been added ( $p H_{10 m L}$ ) Given: $K_{a} (C H_{3} C O O H) = 1.8 \times 10^{- 5}$

Discussion

26.	What is the value of 4 days in seconds?
Answer» What is the value of 4 days in seconds?

Discussion

27.	Question 44 Match the reaction given in the column (A) with the names given in column(B)
Answer» Question 44 Match the reaction given in the column (A) with the names given in column(B)

Discussion

28.	why alkali metals are most suitable as photosensitive surfaces?
Answer» why alkali metals are most suitable as photosensitive surfaces?

Discussion

29.	pKa values of two acids A and B are 4 and 5. The strengths of these two acids are related as
Answer» $p K_{a}$ values of two acids A and B are 4 and 5. The strengths of these two acids are related as

29.

pKa values of two acids A and B are 4 and 5. The strengths of these two acids are related as

Answer»

$p K_{a}$ values of two acids A and B are 4 and 5. The strengths of these two

acids are related as

Discussion

30.	Ammonium dichromate is used in fire works. The green coloured powder obtained is:
Answer» Ammonium dichromate is used in fire works. The green coloured powder obtained is:

Discussion

31.	A 0.50 g sample of rock was found to have 2.5×10−6 mol of 4019K(t1/2=1.3×109 years) and 7.5×10−6mol of 4020Ca. How old is the rock?
Answer» A $0.50 g$ sample of rock was found to have $2.5 \times 10^{- 6} mol$ of $_{19}^{40} K (t_{1 / 2} = 1.3 \times 10^{9} years)$ and $7.5 \times 10^{- 6} {mol of}_{20}^{40} C a$ . How old is the rock?

Discussion

32.	What is a super octet molecule ? Give examples with its lewis structure
Answer» What is a super octet molecule ? Give examples with its lewis structure

Discussion

33.	Which of the following oxidation states are the most characteristic for lead and tin respectively :
Answer» Which of the following oxidation states are the most characteristic for lead and tin respectively :

Discussion

34.	Consider the following statements. The Van der Walls parameters are given as: Select the correct alternates.
Answer» Consider the following statements. The Van der Walls parameters are given as: Select the correct alternates.

34.

Consider the following statements. The Van der Walls parameters are given as: Select the correct alternates.

Answer»

Consider the following statements. The Van der Walls parameters are given as:

Select the correct alternates.

Discussion

35.	Assuming CO2 to be van der waals gas, calculate its Boyle temperature. Given a=3.59 atm L2 mol−2b=0.0427 L mol−1 Boyle temperature Tb is
Answer» Assuming $C O_{2}$ to be van der waals gas, calculate its Boyle temperature. Given $a = 3.59 a t m L^{2} m o l^{- 2} b = 0.0427 L m o l^{- 1}$ Boyle temperature $T_{b}$ is

35.

Assuming CO2 to be van der waals gas, calculate its Boyle temperature. Given a=3.59 atm L2 mol−2b=0.0427 L mol−1 Boyle temperature Tb is

Answer»

Assuming $C O_{2}$ to be van der waals gas, calculate its Boyle temperature. Given $a = 3.59 a t m L^{2} m o l^{- 2} b = 0.0427 L m o l^{- 1}$

Boyle temperature $T_{b}$ is

Discussion

36.	Which of the following compound is produced when CH2=CH−(CH2)2COOH reacts with HBr in presence of peroxides
Answer» Which of the following compound is produced when $C H_{2} = C H - (C H_{2})_{2} C O O H$ reacts with HBr in presence of peroxides

Discussion

37.	Which of the following contains max no. Of atoms:(explain too) A)1g O2 B)1g O-atom C)1g O3 D)All have same
Answer» Which of the following contains max no. Of atoms:(explain too) A)1g O₂ B)1g O-atom C)1g O₃ D)All have same

37.

Which of the following contains max no. Of atoms:(explain too) A)1g O2 B)1g O-atom C)1g O3 D)All have same

Answer»

Which of the following contains max no. Of atoms:(explain too)

A)1g O₂

B)1g O-atom

C)1g O₃

D)All have same

Discussion

38.	Calcium and magnesium ion form a 105 L sample of hard water was quantitatively precipitated as carbonates and weight of precipitate obtained was found to be 568 g. On strong heating 264 g of weight is lost. The molarity of the Ca2+ ions in hard water is x×10−5 M. Find x
Answer» Calcium and magnesium ion form a $10^{5}$ L sample of hard water was quantitatively precipitated as carbonates and weight of precipitate obtained was found to be 568 g. On strong heating 264 g of weight is lost. The molarity of the $C a^{2 +}$ ions in hard water is $x \times 10^{- 5}$ M. Find x

Discussion

39.	What is the actual length of DNA present in 1 cell?
Answer» What is the actual length of DNA present in 1 cell?

Discussion

40.	The freezing point of a solution containing 50 cm3 of ethylene glycol in 50 g of water is found to be −34∘ C. Assuming ideal behaviour, calculate the density of ethylene glycol. (Kf for water =1.86 K kg mol−1)
Answer» The freezing point of a solution containing $50 {cm}^{3}$ of ethylene glycol in $50 g$ of water is found to be $- 34^{\circ} C$ . Assuming ideal behaviour, calculate the density of ethylene glycol. ( $K_{f}$ for water $= 1.86 {K kg mol}^{- 1}$ )

Discussion

41.	Given compound (A) upon treatment with KMnO4/H+ gives (B), which on heating with ammonia produces (C). (C) on treatment with Br2/NaOH produces (D). Strongly heating (C) produces (E) which on further reatment with ethyl 2-bromoacetate in the presence of KOH followed by acidification gives (F). (D) is:
Answer» Given compound (A) upon treatment with $K M n O_{4} / H^{+}$ gives (B), which on heating with ammonia produces (C). (C) on treatment with $B r_{2} / N a O H$ produces (D). Strongly heating (C) produces (E) which on further reatment with ethyl 2-bromoacetate in the presence of $K O H$ followed by acidification gives (F). (D) is:

Discussion

42.	Alcoholic fermentation is brought about by the action of [CPMT 1977, 79, 88; DPMT 1983]
Answer» Alcoholic fermentation is brought about by the action of [CPMT 1977, 79, 88; DPMT 1983]

Discussion

43.	The electrochemical equivalent of copper is 0.0003296 g coulomb-1. Calculate the amount of copper deposited by a current of 0.5 ampere flowing through copper sulphate solution for 50 minutes.
Answer» The electrochemical equivalent of copper is 0.0003296 g coulomb-1. Calculate the amount of copper deposited by a current of 0.5 ampere flowing through copper sulphate solution for 50 minutes.

Discussion

44.	α− helix is a secondary structure of proteins formed by twisting of polypeptide chain into right handed screw like structure. Which type of interactions are responsible for making the α− helix structure stable?
Answer» $α -$ helix is a secondary structure of proteins formed by twisting of polypeptide chain into right handed screw like structure. Which type of interactions are responsible for making the $α -$ helix structure stable?

Discussion

45.	In a fuel cell, H2 and O2 react to produce electricity. In the process, H2 gas is oxidized at the anode and O2 gas is reduced at the cathode. If 67.2 litres of H2 at STP react in 15 minutes and the entire current is used for electrode deposition of Cu from Cu(II) solution, how many grams of Cu will be deposited and what is the average current produced? Anode : H2+2OH−→2H2O+2e− Cathode : O2+2H2O+4e−→4OH−
Answer» In a fuel cell, $H_{2}$ and $O_{2}$ react to produce electricity. In the process, $H_{2}$ gas is oxidized at the anode and $O_{2}$ gas is reduced at the cathode. If $67.2 litres$ of $H_{2}$ at $S T P$ react in 15 minutes and the entire current is used for electrode deposition of $C u$ from $C u (I I)$ solution, how many grams of $C u$ will be deposited and what is the average current produced? Anode : $H_{2} + 2 O H^{-} \to 2 H_{2} O + 2 e^{-}$ Cathode : $O_{2} + 2 H_{2} O + 4 e^{-} \to 4 O H^{-}$

Discussion

46.	108 g silver (molar mass 108 g mol−1) is deposited at cathode from AgNO3(aq) solution by a certain quantity of electricity. The volume (in L) of oxygen gas produced at 273 K and 1 bar pressure from water by the same quantity of electricity is
Answer» 108 g silver (molar mass 108 g $m o l^{- 1}$ ) is deposited at cathode from $A g N O_{3} (a q)$ solution by a certain quantity of electricity. The volume (in L) of oxygen gas produced at 273 K and 1 bar pressure from water by the same quantity of electricity is

Discussion

47.	Which of these alkyl halides will undergo SN1 reaction at the fastest rate?
Answer» Which of these alkyl halides will undergo $S_{N} 1$ reaction at the fastest rate?

Discussion

48.	Which of the following configurations will have the least electron affinity?
Answer» Which of the following configurations will have the least electron affinity?

Discussion

49.	The sum of the molecular mass of gas (A) + The number of α−hydrogen(s) in (B) + The number of stereoisomers of (C) + The degree of unsaturation in (D) is:
Answer» The sum of the molecular mass of gas (A) + The number of $α -$ hydrogen(s) in (B) + The number of stereoisomers of (C) + The degree of unsaturation in (D) is:

Discussion

50.	A vessel contains M grams of water at a certain temperature and water at certain other temperature is passed into it at a constant rate of m g/s. The variation of temperature of the mixture with the time is shown in Fig. The values of M and m are, respectively (the heat exchanged after a long time is 800 cal)
Answer» A vessel contains $M$ grams of water at a certain temperature and water at certain other temperature is passed into it at a constant rate of m g/s. The variation of temperature of the mixture with the time is shown in Fig. The values of $M$ and $m$ are, respectively (the heat exchanged after a long time is 800 cal)

50.

A vessel contains M grams of water at a certain temperature and water at certain other temperature is passed into it at a constant rate of m g/s. The variation of temperature of the mixture with the time is shown in Fig. The values of M and m are, respectively (the heat exchanged after a long time is 800 cal)

Answer»

A vessel contains $M$ grams of water at a certain temperature and water at certain other temperature is passed into it at a constant rate of m g/s. The variation of temperature of the mixture with the time is shown in Fig. The values of $M$ and $m$ are, respectively (the heat exchanged after a long time is 800 cal)

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The micronutrient, molybdenum, is important

Which of the following is not the product of dehydration of the given compound?

Which of the following has the highest Nucleophilicity?

The products formed by the ozonolysis of an olefin 'X' in the following equation

Which of the following pairs of d-orbitals have electron density along the axes ?

After 2hours, one-sixteenth of the starting amount of a certain radioactive isotope remained undecayed.The half-life of the isotope is

Which of the following is true structure of H2O2?

C8H6O4Δ−→XNH3−−−→Y The compound X is

Amongst the compounds given, the one that would form a brilliant coloured dye on treatment with NaNO2 in dil. HCl followed by addition to an alkaline solution of β-naphthol is :

What products are expected from the disproportionation reaction of hypochlorous acid?

The enolic form of acetone contains

Iodine reacts with hypo to give:

A monochromatic source of light operating at 198 W emits 4×1020 photons per second. Find the wavelength of light in nm.(Take h=6.6×10−34 Js)

If two moles of KMnO4 oxidises 3 moles of Mx+ to MO−3 in neutral medium. Find the value of x.

The size of the species I,I− &amp; I+ follows the order:

The reaction is faster when X is :

Which of the following ion will have minimum flocculation value for ferric oxide sol?

QUESTION 2.17 The vapour pressure of water is 12.3 kPa at 300 K. Calculate vapour pressure of 1 molal solution of a non-volatile solute in it.

2.5 mL of 25 M weak monoacidic base (Kb=1×10−12) at 25o C is titrated with 215 M HCl in water at 25oC. The concentration of H+ at equivalence points is (Kw=1×10−14 at 25o C)

What is the meaning of following line: in crystalline solids same physical property is found to be different along different direction

Match the following:

What is the volume strength of 1.5 N H2O2 solution?

In the given conversion, the best yield will be obtained with:

A 50 mL solution of 0.2 M CH3COOH is titrated with 0.2 M NaOH. Find the pH of solution when: (a) 0 mL NaOH is added (pHinitial) (b) 10 mL of NaOH has been added (pH10mL) Given: Ka(CH3COOH)=1.8×10−5

What is the value of 4 days in seconds?

Question 44 Match the reaction given in the column (A) with the names given in column(B)

why alkali metals are most suitable as photosensitive surfaces?

pKa values of two acids A and B are 4 and 5. The strengths of these two acids are related as

Ammonium dichromate is used in fire works. The green coloured powder obtained is:

A 0.50 g sample of rock was found to have 2.5×10−6 mol of 4019K(t1/2=1.3×109 years) and 7.5×10−6mol of 4020Ca. How old is the rock?

What is a super octet molecule ? Give examples with its lewis structure

Which of the following oxidation states are the most characteristic for lead and tin respectively :

Consider the following statements. The Van der Walls parameters are given as: Select the correct alternates.

Assuming CO2 to be van der waals gas, calculate its Boyle temperature. Given a=3.59 atm L2 mol−2b=0.0427 L mol−1 Boyle temperature Tb is

Which of the following compound is produced when CH2=CH−(CH2)2COOH reacts with HBr in presence of peroxides

Which of the following contains max no. Of atoms:(explain too) A)1g O2 B)1g O-atom C)1g O3 D)All have same​

Calcium and magnesium ion form a 105 L sample of hard water was quantitatively precipitated as carbonates and weight of precipitate obtained was found to be 568 g. On strong heating 264 g of weight is lost. The molarity of the Ca2+ ions in hard water is x×10−5 M. Find x

What is the actual length of DNA present in 1 cell?

The freezing point of a solution containing 50 cm3 of ethylene glycol in 50 g of water is found to be −34∘ C. Assuming ideal behaviour, calculate the density of ethylene glycol. (Kf for water =1.86 K kg mol−1)

Alcoholic fermentation is brought about by the action of [CPMT 1977, 79, 88; DPMT 1983]

The electrochemical equivalent of copper is 0.0003296 g coulomb-1. Calculate the amount of copper deposited by a current of 0.5 ampere flowing through copper sulphate solution for 50 minutes.

α− helix is a secondary structure of proteins formed by twisting of polypeptide chain into right handed screw like structure. Which type of interactions are responsible for making the α− helix structure stable?

108 g silver (molar mass 108 g mol−1) is deposited at cathode from AgNO3(aq) solution by a certain quantity of electricity. The volume (in L) of oxygen gas produced at 273 K and 1 bar pressure from water by the same quantity of electricity is

Which of these alkyl halides will undergo SN1 reaction at the fastest rate?

Which of the following configurations will have the least electron affinity?

The sum of the molecular mass of gas (A) + The number of α−hydrogen(s) in (B) + The number of stereoisomers of (C) + The degree of unsaturation in (D) is:

The size of the species I,I− & I+ follows the order:

Which of the following contains max no. Of atoms:(explain too) A)1g O2 B)1g O-atom C)1g O3 D)All have same