46295 + Interview Questions in Chemistry

1.	Which of the following amines will not give the carbylamine test?
Answer» Which of the following amines will not give the carbylamine test?

Discussion

2.

Ils se présentent sur Internet : Salut ! Je m'appelle Vasu. Je suis Indien. J'habite à Chennai. J'ai treize ans. Je parle hindi, anglais, tamoul et un peu français. J'aime... Bonjour ! Mon nom, c'est Bond, James Bond. Je suis de Londres. Je suis anglais. Je parle bien anglais, français et espagnol. Salut ! Je suis de Paris mais je suis algérien. Je parle français, arabe et un peu allemand. Mes parents habitent en Algérie. - Amir Abdoullah Remplis la grille avec les éléments demandés à l'aide des messages au dessus :

Answer» Ils se présentent sur Internet :

Salut ! Je m'appelle Vasu. Je suis Indien. J'habite à Chennai. J'ai treize ans. Je parle hindi, anglais, tamoul et un peu français. J'aime...	Bonjour ! Mon nom, c'est Bond, James Bond. Je suis de Londres. Je suis anglais. Je parle bien anglais, français et espagnol.
Salut ! Je suis de Paris mais je suis algérien. Je parle français, arabe et un peu allemand. Mes parents habitent en Algérie. - Amir Abdoullah

Remplis la grille avec les éléments demandés à l'aide des messages au dessus :

Discussion

3.	Calculate q (in kilo joules), for the reversible isothermal expansion of two mole of an ideal gas at 27oC from a volume of 10 dm3 to a volume of 30 dm3.
Answer» Calculate $q$ (in kilo joules), for the reversible isothermal expansion of two mole of an ideal gas at $27^{o} C$ from a volume of $10 d m^{3}$ to a volume of $30 d m^{3}$ .

Discussion

4.	Which of the following product is formed when four moles of NO gas reacts with two moles of potassium hydroxide?
Answer» Which of the following product is formed when four moles of $N O$ gas reacts with two moles of potassium hydroxide?

Discussion

5.	1. The straight lines whose direction cosines are given by al + bm + cn = 0 and fmn + gnl + hlm = 0 are perpendicular if
Answer» 1. The straight lines whose direction cosines are given by al + bm + cn = 0 and fmn + gnl + hlm = 0 are perpendicular if

Discussion

6.	Which of the following pairs is not isostructural?
Answer» Which of the following pairs is not isostructural?

Discussion

7.	How to write the products of Na2CO3 + H2SO4---> NH4Cl + Ca(OH)2---> NaHSO3 + HCl --->
Answer» How to write the products of Na2CO3 + H2SO4---> NH4Cl + Ca(OH)2---> NaHSO3 + HCl --->

Discussion

8.	Which of the following complexes has highest stability constant at 298 K?
Answer» Which of the following complexes has highest stability constant at 298 K?

Discussion

9.	The oxide which cannot act as reducing agent: (1)CO_2 (2)ClO_2 (3)NO_2 (4)SO_{2.
Answer» The oxide which cannot act as reducing agent: (1)CO_2 (2)ClO_2 (3)NO_2 (4)SO_{2.

Discussion

10.	If Cl2 is passed into hot NaOH solution, oxidation number of chlorine changes from:
Answer» If $C l_{2}$ is passed into hot NaOH solution, oxidation number of chlorine changes from:

Discussion

11.	36. How can 1s orbital of Hydrogen undergo hybridisation with 2p orbital of carbon, when they have different energy levels? Energy of orbitals must be similar to undergo hybridisation?
Answer» 36. How can 1s orbital of Hydrogen undergo hybridisation with 2p orbital of carbon, when they have different energy levels? Energy of orbitals must be similar to undergo hybridisation?

Discussion

12.	10. Balance the chemical reaction- Al + NO3- --> Al(OH)4- +NH3, In Basic medium.
Answer» 10. Balance the chemical reaction- Al + NO3- --> Al(OH)4- +NH3, In Basic medium.

Discussion

13.	The sequence for the stability of carbanions H−C≡C−, H2C=−CH and −CH3 is:
Answer» The sequence for the stability of carbanions $H - C \equiv C^{-}, H_{2} C = - C H$ and $^{-} C H_{3}$ is:

Discussion

14.	69. Among the following the one which reacts most readily with ethanol is :1) p -nitrobenzyl bromide2) p -chlorobenzyl bromide3) p -methoxybenzyl bromide4) p -methylbenzyl bromide
Answer» 69. Among the following the one which reacts most readily with ethanol is : 1) p -nitrobenzyl bromide 2) p -chlorobenzyl bromide 3) p -methoxybenzyl bromide 4) p -methylbenzyl bromide

Discussion

15.	Arrangement of (CH3)3−C−,(CH3)2−CH2−,CH3−CH2− when attached to benzyl or an unsaturated group in increasing order of inductive effect is
Answer» Arrangement of $(C H_{3})_{3} - C -, (C H_{3})_{2} - C H_{2} -, C H_{3} - C H_{2} -$ when attached to benzyl or an unsaturated group in increasing order of inductive effect is

Discussion

16.	When will the oxidation number be fractional? Also explain what is average oxidation number in this regard.
Answer» When will the oxidation number be fractional? Also explain what is average oxidation number in this regard.

Discussion

17.	In the following molecules: CH3Br, CH3F, CH3Cl, CH3I I , II , III , IV The correct order of dipole moment will be:
Answer» In the following molecules: $C H_{3} B r, C H_{3} F, C H_{3} C l, C H_{3} I I, I I, I I I, I V$ The correct order of dipole moment will be:

Discussion

18.	Givethe IUPAC names of the following compounds:(i) PhCH2CH2COOH (ii) (CH3)2C=CHCOOH(iii) (iv)
Answer» Give the IUPAC names of the following compounds: (i) PhCH₂CH₂COOH (ii) (CH₃)₂C=CHCOOH (iii) (iv)

18.

Givethe IUPAC names of the following compounds:(i) PhCH2CH2COOH (ii) (CH3)2C=CHCOOH(iii) (iv)

Answer»

Give
the IUPAC names of the following compounds:

(i)
PhCH₂CH₂COOH
(ii)
(CH₃)₂C=CHCOOH

(iii) (iv)

Discussion

19.	the order of reactivity of alchols with sodium is
Answer» the order of reactivity of alchols with sodium is

Discussion

20.	The correct order of melting point of group 14 elements is :
Answer» The correct order of melting point of group 14 elements is :

Discussion

21.	The mass percentage of nitrogen in urea (NH2CONH2)is:
Answer» The mass percentage of nitrogen in urea ( $N H_{2} C O N H_{2}$ )is:

Discussion

22.	3. What volume of 5M Na_2SO_4 must be added to 25 ml of 1 M BaCl_2 to produce 10 g of BaSO_4?
Answer» 3. What volume of 5M Na_2SO_4 must be added to 25 ml of 1 M BaCl_2 to produce 10 g of BaSO_4?

Discussion

23.	If frequency of light falling on a photosensitive material Doubles 1)saturation photo and current doubled 2)saturation photo current becomes more than the double 3)cutoff voltage becomes more than double 4) stopping potential doubles
Answer» If frequency of light falling on a photosensitive material Doubles 1)saturation photo and current doubled 2)saturation photo current becomes more than the double 3)cutoff voltage becomes more than double 4) stopping potential doubles

Discussion

24.	Which of the following substances do not lose their magnetic properties when external magnetic field is removed?
Answer» Which of the following substances do not lose their magnetic properties when external magnetic field is removed?

Discussion

25.	What is the chemical formula for PVC - Polyvinyl Chloride, which is a synthetic polymer?
Answer» What is the chemical formula for PVC - Polyvinyl Chloride, which is a synthetic polymer?

Discussion

26.	The starting material for the oxidation reaction shown below is:
Answer» The starting material for the oxidation reaction shown below is:

Discussion

27.	Q . In a ccp type structure, if half of the face-centred atoms are removed, then percentage of vacant space in unit cell is approximately : (a) 54% (b) 46.25% (c) 63% (d) 37%.
Answer» Q . In a ccp type structure, if half of the face-centred atoms are removed, then percentage of vacant space in unit cell is approximately : (a) 54% (b) 46.25% (c) 63% (d) 37%.

Discussion

28.	Calculate the molality of ethanol in water in which the mole fraction of ethnol is 0.040.
Answer» Calculate the molality of ethanol in water in which the mole fraction of ethnol is $0.040$ .

Discussion

29.	The order of -I power of the following functional groups will be 1) SO3H 2) Cl 3) NH2 4)H
Answer» The order of -I power of the following functional groups will be 1) SO3H 2) Cl 3) NH2 4)H

Discussion

30.	How many significant figures are there in 0.0, 360 degree and to 2400.00
Answer» How many significant figures are there in 0.0, 360 degree and to 2400.00

Discussion

31.	When 15g of a mixture of NACL and NA2CO3 is heatec with dil HCL 2.5g of CO2 is evolved at stp. Calculate % composition of the original mixture.
Answer» When 15g of a mixture of NACL and NA2CO3 is heatec with dil HCL 2.5g of CO2 is evolved at stp. Calculate % composition of the original mixture.

Discussion

32.	10g of MnO2 on reaction with hcl forms 2.24l of cl2 at ntp ,the percentage impurity of mno2 is
Answer» 10g of MnO2 on reaction with hcl forms 2.24l of cl2 at ntp ,the percentage impurity of mno2 is

Discussion

33.	If we add 1*10-8 of HCl into pure water in the following reaction: HCl (aq) + H2O (l) to give H3O+ (aq) + Cl- (aq) and assuming that volume doesn't change when HCl is added, why is H3O+ = HCl = 10-8? Shouldn't it be H3O+ + HCl = 10-8 because HCl is dissolved with water?
Answer» If we add 1*10^-8of HCl into pure water in the following reaction: HCl (aq) + H₂O (l) to give H₃O⁺ (aq) + Cl^- (aq) and assuming that volume doesn't change when HCl is added, why is H₃O⁺= HCl = 10^-8? Shouldn't it be H₃O⁺+ HCl = 10^-8 because HCl is dissolved with water?

Discussion

34.	to account for atomic mass of nitrogen as 14.0067 what should be the ratio of 15^N and 14^N atoms in natural nitrogen. (atomic mass of 14^N = 14.00307 u, 15^N=15.001 u) .
Answer» to account for atomic mass of nitrogen as 14.0067 what should be the ratio of 15^N and 14^N atoms in natural nitrogen. (atomic mass of 14^N = 14.00307 u, 15^N=15.001 u) .

Discussion

35.	What is the principal product of the following reaction?
Answer» What is the principal product of the following reaction?

Discussion

36.	What is the hybridisation of carbocation?
Answer» What is the hybridisation of carbocation?

Discussion

37.	63. If boiling point of an aq. Sol. Is 100.1'C what is its freezing point. Given latent heat of fusiin and vapourisation of water are 80 calg-1 and 540 calg-1 resp.
Answer» 63. If boiling point of an aq. Sol. Is 100.1'C what is its freezing point. Given latent heat of fusiin and vapourisation of water are 80 calg-1 and 540 calg-1 resp.

Discussion

38.	12. Draw the Lewis dot structure of NO_3^- and calculate number of bond pairs and lone pairs in central atom
Answer» 12. Draw the Lewis dot structure of NO_3^- and calculate number of bond pairs and lone pairs in central atom

Discussion

39.	One mapping is selected at random from all mappings of the set A = {1, 2, 3, ..., n} into itself. The probability that the mapping selected is one to one is(a) 1nn (b) 1n! (c) n-1!nn-1 (d) None of these
Answer» One mapping is selected at random from all mappings of the set A = {1, 2, 3, ..., n} into itself. The probability that the mapping selected is one to one is (a) $\frac{1}{n^{n}}$ (b) $\frac{1}{n!}$ (c) $\frac{(n - 1)!}{n^{n - 1}}$ (d) None of these

Discussion

40.	Consider following reactions and write total number of reactions which can produce 1∘ alcohol as one of the product.
Answer» Consider following reactions and write total number of reactions which can produce $1^{\circ}$ alcohol as one of the product.

Discussion

41.	A 15 L cylinder of He gas is connected to an evacuated 235 L †an k.if the final pressure is 750 mm Hg.then what have been the original gas pressure in the cylinder
Answer» A 15 L cylinder of He gas is connected to an evacuated 235 L †an k.if the final pressure is 750 mm Hg.then what have been the original gas pressure in the cylinder

Discussion

42.	41.Which has will effusion FASTER NH3 OR qCO WHAT ARE THEIR RELATIVE rates of effusion
Answer» 41.Which has will effusion FASTER NH3 OR qCO WHAT ARE THEIR RELATIVE rates of effusion

Discussion

43.	Which of the following is/are the suitable product(s) of pyrolysis of hexane?
Answer» Which of the following is/are the suitable product(s) of pyrolysis of hexane?

Discussion

44.	The density of alcohol is 780 kg/m3. Its relative density is
Answer» The density of alcohol is $780 {kg/m}^{3}$ . Its relative density is

Discussion

45.	Identify the principal product of the following reaction?
Answer» Identify the principal product of the following reaction?

Discussion

46.	(i) The energyassociated with the first orbit in the hydrogen atom is –2.18 ×10–18J atom–1.What is the energy associated with the fifth orbit?(ii) Calculatethe radius of Bohr’s fifth orbit for hydrogen atom.
Answer» (i) The energy associated with the first orbit in the hydrogen atom is –2.18 × 10^–18 J atom^–1. What is the energy associated with the fifth orbit? (ii) Calculate the radius of Bohr’s fifth orbit for hydrogen atom.

46.

(i) The energyassociated with the first orbit in the hydrogen atom is –2.18 ×10–18J atom–1.What is the energy associated with the fifth orbit?(ii) Calculatethe radius of Bohr’s fifth orbit for hydrogen atom.

Answer»

(i) The energy
associated with the first orbit in the hydrogen atom is –2.18 ×
10^–18
J atom^–1.
What is the energy associated with the fifth orbit?

(ii) Calculate
the radius of Bohr’s fifth orbit for hydrogen atom.

Discussion

47.	Give the reason why a delta is formed at the meeting point of seawater and river water.
Answer» Give the reason why a delta is formed at the meeting point of seawater and river water.

Discussion

48.	Explain resonance in 2chloro but-1,3-diene
Answer» Explain resonance in 2chloro but-1,3-diene

Discussion

49.	For the conversion of aniline to N−methyl aniline, the reagent used is:
Answer» For the conversion of aniline to $N -$ methyl aniline, the reagent used is:

Discussion

50.	The rms velocity of hydrogen is √7 times the rms velocity of nitrogen. If T is the temperature of the gas, then
Answer» The rms velocity of hydrogen is $\sqrt{7}$ times the rms velocity of nitrogen. If $T$ is the temperature of the gas, then

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Which of the following amines will not give the carbylamine test?

Calculate q (in kilo joules), for the reversible isothermal expansion of two mole of an ideal gas at 27oC from a volume of 10 dm3 to a volume of 30 dm3.

Which of the following product is formed when four moles of NO gas reacts with two moles of potassium hydroxide?

1. The straight lines whose direction cosines are given by al + bm + cn = 0 and fmn + gnl + hlm = 0 are perpendicular if

Which of the following pairs is not isostructural?

How to write the products of Na2CO3 + H2SO4---> NH4Cl + Ca(OH)2---> NaHSO3 + HCl --->

Which of the following complexes has highest stability constant at 298 K?

The oxide which cannot act as reducing agent: (1)CO_2 (2)ClO_2 (3)NO_2 (4)SO_{2.

If Cl2 is passed into hot NaOH solution, oxidation number of chlorine changes from:

36. How can 1s orbital of Hydrogen undergo hybridisation with 2p orbital of carbon, when they have different energy levels? Energy of orbitals must be similar to undergo hybridisation?

10. Balance the chemical reaction- Al + NO3- --> Al(OH)4- +NH3, In Basic medium.

The sequence for the stability of carbanions H−C≡C−, H2C=−CH and −CH3 is:

69. Among the following the one which reacts most readily with ethanol is :1) p -nitrobenzyl bromide2) p -chlorobenzyl bromide3) p -methoxybenzyl bromide4) p -methylbenzyl bromide

Arrangement of (CH3)3−C−,(CH3)2−CH2−,CH3−CH2− when attached to benzyl or an unsaturated group in increasing order of inductive effect is

When will the oxidation number be fractional? Also explain what is average oxidation number in this regard.

In the following molecules: CH3Br, CH3F, CH3Cl, CH3I I , II , III , IV The correct order of dipole moment will be:

Givethe IUPAC names of the following compounds:(i) PhCH2CH2COOH (ii) (CH3)2C=CHCOOH(iii) (iv)

the order of reactivity of alchols with sodium is

The correct order of melting point of group 14 elements is :

The mass percentage of nitrogen in urea (NH2CONH2)is:

3. What volume of 5M Na_2SO_4 must be added to 25 ml of 1 M BaCl_2 to produce 10 g of BaSO_4?

If frequency of light falling on a photosensitive material Doubles 1)saturation photo and current doubled 2)saturation photo current becomes more than the double 3)cutoff voltage becomes more than double 4) stopping potential doubles

Which of the following substances do not lose their magnetic properties when external magnetic field is removed?

What is the chemical formula for PVC - Polyvinyl Chloride, which is a synthetic polymer?

The starting material for the oxidation reaction shown below is:

Q . In a ccp type structure, if half of the face-centred atoms are removed, then percentage of vacant space in unit cell is approximately : (a) 54% (b) 46.25% (c) 63% (d) 37%.

Calculate the molality of ethanol in water in which the mole fraction of ethnol is 0.040.

The order of -I power of the following functional groups will be 1) SO3H 2) Cl 3) NH2 4)H

How many significant figures are there in 0.0, 360 degree and to 2400.00

When 15g of a mixture of NACL and NA2CO3 is heatec with dil HCL 2.5g of CO2 is evolved at stp. Calculate % composition of the original mixture.

10g of MnO2 on reaction with hcl forms 2.24l of cl2 at ntp ,the percentage impurity of mno2 is

If we add 1*10-8 of HCl into pure water in the following reaction: HCl (aq) + H2O (l) to give H3O+ (aq) + Cl- (aq) and assuming that volume doesn't change when HCl is added, why is H3O+ = HCl = 10-8? Shouldn't it be H3O+ + HCl = 10-8 because HCl is dissolved with water?

to account for atomic mass of nitrogen as 14.0067 what should be the ratio of 15^N and 14^N atoms in natural nitrogen. (atomic mass of 14^N = 14.00307 u, 15^N=15.001 u) .

What is the principal product of the following reaction?

What is the hybridisation of carbocation?

63. If boiling point of an aq. Sol. Is 100.1'C what is its freezing point. Given latent heat of fusiin and vapourisation of water are 80 calg-1 and 540 calg-1 resp.

12. Draw the Lewis dot structure of NO_3^- and calculate number of bond pairs and lone pairs in central atom

One mapping is selected at random from all mappings of the set A = {1, 2, 3, ..., n} into itself. The probability that the mapping selected is one to one is(a) 1nn (b) 1n! (c) n-1!nn-1 (d) None of these

Consider following reactions and write total number of reactions which can produce 1∘ alcohol as one of the product.

A 15 L cylinder of He gas is connected to an evacuated 235 L †an k.if the final pressure is 750 mm Hg.then what have been the original gas pressure in the cylinder

41.Which has will effusion FASTER NH3 OR qCO WHAT ARE THEIR RELATIVE rates of effusion

Which of the following is/are the suitable product(s) of pyrolysis of hexane?

The density of alcohol is 780 kg/m3. Its relative density is

Identify the principal product of the following reaction?

(i) The energyassociated with the first orbit in the hydrogen atom is –2.18 ×10–18J atom–1.What is the energy associated with the fifth orbit?(ii) Calculatethe radius of Bohr’s fifth orbit for hydrogen atom.

Give the reason why a delta is formed at the meeting point of seawater and river water.

Explain resonance in 2chloro but-1,3-diene

For the conversion of aniline to N−methyl aniline, the reagent used is:

The rms velocity of hydrogen is √7 times the rms velocity of nitrogen. If T is the temperature of the gas, then