46295 + Interview Questions in Chemistry

1.	ΔH<ΔE for the reaction:
Answer» $Δ H < Δ E$ for the reaction:

Discussion

2.	What is S8 molecules?
Answer» What is S8 molecules?

Discussion

3.	What is the use of lithium 6 in hydrogen bom
Answer» What is the use of lithium 6 in hydrogen bom

Discussion

4.	What amount of heat must be supplied to2.0 × 10–2 kg of nitrogen (at roomtemperature) to raise its temperature by 45 °C at constantpressure? (Molecular mass of N2 = 28; R= 8.3 J mol–1 K–1.)
Answer» What amount of heat must be supplied to 2.0 × 10^–2 kg of nitrogen (at room temperature) to raise its temperature by 45 °C at constant pressure? (Molecular mass of N₂ = 28; R = 8.3 J mol^–1 K^–1.)

Discussion

5.	If the mole fraction of MgO aqueous is 0.2 then find the molarity of the solution.
Answer» If the mole fraction of MgO aqueous is 0.2 then find the molarity of the solution.

Discussion

6.	Chlorine in +1 oxidation state is in(a) HCI (b) HCIO4 (c) ICI(d) ClO
Answer» Chlorine in +1 oxidation state is in(a) HCI (b) HCIO4 (c) ICI(d) ClO

Discussion

7.	The Tyndall effect is not observed in :
Answer» The Tyndall effect is not observed in :

Discussion

8.	Twoelements A and B form compounds having formula AB2and AB4.When dissolved in 20 g of benzene (C6H6),1 g of AB2lowers the freezing point by 2.3 Kwhereas 1.0 g of AB4lowers it by 1.3 K.The molar depression constant for benzene is 5.1 Kkg mol−1.Calculate atomic masses of A and B.
Answer» Two elements A and B form compounds having formula AB₂ and AB₄. When dissolved in 20 g of benzene (C₆H₆), 1 g of AB₂ lowers the freezing point by 2.3 Kwhereas 1.0 g of AB₄ lowers it by 1.3 K. The molar depression constant for benzene is 5.1 Kkg mol⁻¹. Calculate atomic masses of A and B.

Discussion

9.	Difference between male and female merchantia
Answer» Difference between male and female merchantia

Discussion

10.	42. In which of the following molecules/ions BF3 NO2,NH2- and H2O, the central atom is sp2 hybridized?\lbrack AIPMT (Prelims)-2009\rbrack(1) NH2 and H2O(2) NO2 and H2O 3)BF3, and NO-(4) NO2 and NH2
Answer» 42. In which of the following molecules/ions BF3 NO2,NH2- and H2O, the central atom is sp2 hybridized?\lbrack AIPMT (Prelims)-2009\rbrack(1) NH2 and H2O(2) NO2 and H2O 3)BF3, and NO-(4) NO2 and NH2

Discussion

11.	If the weight of hydrogen in a sample of Ammonia is 30g. Find the weight of the sample ?how to find this weight by taking out no. of moles?
Answer» If the weight of hydrogen in a sample of Ammonia is 30g. Find the weight of the sample ? how to find this weight by taking out no. of moles?

Discussion

12.	Graphically explain why a solution obtained by adding a non volatile solute in a solvent boils at higher temperature than the pure solvent
Answer» Graphically explain why a solution obtained by adding a non volatile solute in a solvent boils at higher temperature than the pure solvent

Discussion

13.	112.A satellite of mass m is revolving close to surface of a planet of density d with time period T. The value of G on planet is??
Answer» 112.A satellite of mass m is revolving close to surface of a planet of density d with time period T. The value of G on planet is??

Discussion

14.	The commonly used analgesic that does not lead to addiction is
Answer» The commonly used analgesic that does not lead to addiction is

Discussion

15.	In the following monobromination reaction, the number of possible chiral product(s) is/are:
Answer» In the following monobromination reaction, the number of possible chiral product(s) is/are:

Discussion

16.	A substance AxBy crystallises in a FCC lattice. Atoms `A' occupy each corner of the cube and atoms `B' occupy the centres of each face of the cube. The correct composition of AxBy is
Answer» A substance AxBy crystallises in a FCC lattice. Atoms `A' occupy each corner of the cube and atoms `B' occupy the centres of each face of the cube. The correct composition of AxBy is

Discussion

17.	if boiling point difference is high between 2 comp. then which distillation we use ? ex.phenol & acetone.
Answer» if boiling point difference is high between 2 comp. then which distillation we use ? ex.phenol & acetone.

Discussion

18.	What is the difference between aq. Solution of slaked lime(lime water) and suspension of slaked lime in water(milk of lime)
Answer» What is the difference between aq. Solution of slaked lime(lime water) and suspension of slaked lime in water(milk of lime)

Discussion

19.	Aqueous solutions in the order of their increasing boiling points1) 0.0001 M NaCl2)0.001 M MgCl23)0.001 M urea4) 0.001 M Nacl
Answer» Aqueous solutions in the order of their increasing boiling points 1) 0.0001 M NaCl 2)0.001 M MgCl2 3)0.001 M urea 4) 0.001 M Nacl

Discussion

20.	The maximum number of isomeric alkenes with the molecularformulae C4H8, is 1. 2 2. 3 3. 4 4. 5 Aid with explanatio
Answer» The maximum number of isomeric alkenes with the molecularformulae C4H8, is 1. 2 2. 3 3. 4 4. 5 Aid with explanatio

Discussion

21.	The magnitude of surface tension of liquid depends on the attractive forces between the molecules. Arrange the following in increasing order of surface tension: Water, alcohol (C2H5OH) and hexane [CH3(CH2)4CH3)]
Answer» The magnitude of surface tension of liquid depends on the attractive forces between the molecules. Arrange the following in increasing order of surface tension: Water, alcohol $(C_{2} H_{5} O H)$ and hexane $[C H_{3} (C H_{2})_{4} C H_{3})]$

Discussion

22.	34. What is the molarity and molality of 10% NaoH (w/v) solution?
Answer» 34. What is the molarity and molality of 10% NaoH (w/v) solution?

Discussion

23.	London forcees
Answer» London forcees

Discussion

24.	A cylinder contain hydrogen gas at pressure of 249kPa and temperature 27o C its density is:(R=8.3Jmol−1k−1)
Answer» A cylinder contain hydrogen gas at pressure of $249 k P a$ and temperature $2 7^{o}$ C its density is: $(R = 8.3 J m o l^{- 1} k^{- 1})$

Discussion

25.	24. Carbon reduction of ZnO is not possible below 1180K .why?
Answer» 24. Carbon reduction of ZnO is not possible below 1180K .why?

Discussion

26.	A gas contained in a cylinder fitted with a frictionless piston expands against a constant pressure 1 atmosphere from a volume of 4 litre to a volume of 14 litre. In doing so, it absorbs 800 J thermal energy from surrounding . Determine △U for the process.
Answer» A gas contained in a cylinder fitted with a frictionless piston expands against a constant pressure 1 atmosphere from a volume of 4 litre to a volume of 14 litre. In doing so, it absorbs 800 J thermal energy from surrounding . Determine $△ U$ for the process.

Discussion

27.	Calculate number of neutron in one drop of water if 1.8ml= 10 drop
Answer» Calculate number of neutron in one drop of water if 1.8ml= 10 drop

Discussion

28.	Match the complex ions given in Column I with the colours given in Column II and assign the correct code. Column~I Column~II (Complex ion) (Colour)A. [Co(NH3)6]3+1. VioletB. [Ti(H2O)6]3+2. GreenC. [Ni(H2O)6]2+3. Pale blueD. [Ni(H2O)4(en)]2+ (aq)4. Yellowixh orange Codes ABCD(a)1245(b)4321(c)3241(d)4123
Answer» Match the complex ions given in Column I with the colours given in Column II and assign the correct code. $\begin{matrix} Column~I & Column~II (C o m p l e x i o n) & (C o l o u r) A . [C o (N H_{3})_{6}]^{3 +} & 1. V i o l e t B . [T i (H_{2} O)_{6}]^{3 +} & 2. G r e e n C . [N i (H_{2} O)_{6}]^{2 +} & 3. P a l e b l u e D . [N i (H_{2} O)_{4} (e n)]^{2 +} (a q) & 4. Y e l l o w i x h o r a n g e \end{matrix}$ Codes $\begin{matrix} A & B & C & D (a) & 1 & 2 & 4 & 5 (b) & 4 & 3 & 2 & 1 (c) & 3 & 2 & 4 & 1 (d) & 4 & 1 & 2 & 3 \end{matrix}$

Discussion

29.	Diethylamine + Acetyl chloride reacts with pyridine /heat to give
Answer» Diethylamine + Acetyl chloride reacts with pyridine /heat to give

Discussion

30.	What is the number of angular node, nodal plane and radial nodes in a 3dz^2 orbital. Is there any exceptoin in this?
Answer» What is the number of angular node, nodal plane and radial nodes in a 3dz^2 orbital. Is there any exceptoin in this?

Discussion

31.	3. Why nh3 have high dipole moment than nf3
Answer» 3. Why nh3 have high dipole moment than nf3

Discussion

32.	Q 50/75 If in the given reaction, 3I2 + OH I03 5I 2 moles ofiodine are taken, then the ratio of iodate and iodide ions formed inthe alkaline medium is
Answer» Q 50/75 If in the given reaction, 3I2 + OH I03 5I 2 moles ofiodine are taken, then the ratio of iodate and iodide ions formed inthe alkaline medium is

Discussion

33.	Gay -Lusacc 's law of combining volumes
Answer» Gay -Lusacc 's law of combining volumes

Discussion

34.	11. How extra electrolyte can cause slowly precipitation of colloidal solution?
Answer» 11. How extra electrolyte can cause slowly precipitation of colloidal solution?

Discussion

35.	What is 2.116 (bar on 16) in p/q form?
Answer» What is 2.116 (bar on 16) in p/q form?

Discussion

36.	A sweet smelling compounds formed by reacting acetic acid with ethanol in the presence of sulphuric acid is
Answer» A sweet smelling compounds formed by reacting acetic acid with ethanol in the presence of sulphuric acid is

Discussion

37.	Calculate the wavelength of an electron moving with a velocity of 2.05 × 107ms–1.
Answer» Calculate the wavelength of an electron moving with a velocity of 2.05 × 107ms^–1.

Discussion

38.	34.Equivalent mass of oxalic acid
Answer» 34.Equivalent mass of oxalic acid

Discussion

39.	90.Derive Avogadro 's law from kinetic gas theory?
Answer» 90.Derive Avogadro 's law from kinetic gas theory?

Discussion

40.	Is black hole a black body?
Answer» Is black hole a black body?

Discussion

41.	The number of isomeric forms that are represented by aromatic homocyclic compound C7H9N is
Answer» The number of isomeric forms that are represented by aromatic homocyclic compound C₇H₉N is

Discussion

42.	{ †ext { Consider the following reaction: } } { aC _ { 6 } H _ { 6 } + bO _ { 2 } → CCO _ { 2 } + dH _ { 2 } O } { †ext { On balancing, the ratio } b : c †ext { is }
Answer» { †ext { Consider the following reaction: } } { aC _ { 6 } H _ { 6 } + bO _ { 2 } → CCO _ { 2 } + dH _ { 2 } O } { †ext { On balancing, the ratio } b : c †ext { is }

Discussion

43.	Which of the following compounds is the most acidic?
Answer» Which of the following compounds is the most acidic?

Discussion

44.	Why is nitric acid added to sodium extract before adding silver nitrate for testing halogens?
Answer» Why is nitric acid added to sodium extract before adding silver nitrate for testing halogens?

Discussion

45.	why is the law of conservation of mass not applicable for nuclear reactions ?
Answer» why is the law of conservation of mass not applicable for nuclear reactions ?

Discussion

46.	What type of solvent increase the rate of Sn1and Sn2 reaction
Answer» What type of solvent increase the rate of Sn1and Sn2 reaction

Discussion

47.	In the first order reaction NH4NO2(aq)→N2(g)+2H2O(l), the volume of N2 after 20 min and after completion of reaction are 40 mL and 70 mL respectively. The value of rate constant is :Take:log73=0.37
Answer» In the first order reaction $N H_{4} N O_{2} (a q) \to N_{2} (g) + 2 H_{2} O (l)$ , the volume of $N_{2}$ after $20 m i n$ and after completion of reaction are $40 m L$ and $70 m L$ respectively. The value of rate constant is : Take: $l o g \frac{7}{3} = 0.37$

Discussion

48.	what is density
Answer» what is density

Discussion

49.	Arrange the following compounds in the increasing order of their acidic strength: i. M – nitrophenol ii. M – cresol iii. Phenol iv. M – cholorophenol
Answer» Arrange the following compounds in the increasing order of their acidic strength: i. M – nitrophenol ii. M – cresol iii. Phenol iv. M – cholorophenol

49.

Arrange the following compounds in the increasing order of their acidic strength: i. M – nitrophenol ii. M – cresol iii. Phenol iv. M – cholorophenol

Answer»

Arrange the following compounds in the increasing order of their acidic strength:

i. M – nitrophenol

ii. M – cresol

iii. Phenol

iv. M – cholorophenol

Discussion

50.	Retrouvez les phrases suivantes.1. appelle/Sia/je/m'.2. à/habite/Paris/j'.3. bien/vais/je/merci.4. cinq/ai/ans/j'.
Answer» Retrouvez les phrases suivantes. 1. appelle/Sia/je/m'. 2. à/habite/Paris/j'. 3. bien/vais/je/merci. 4. cinq/ai/ans/j'.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

ΔH&lt;ΔE for the reaction:

What is S8 molecules?

What is the use of lithium 6 in hydrogen bom

What amount of heat must be supplied to2.0 × 10–2 kg of nitrogen (at roomtemperature) to raise its temperature by 45 °C at constantpressure? (Molecular mass of N2 = 28; R= 8.3 J mol–1 K–1.)

If the mole fraction of MgO aqueous is 0.2 then find the molarity of the solution.

Chlorine in +1 oxidation state is in(a) HCI (b) HCIO4 (c) ICI(d) ClO

The Tyndall effect is not observed in :

Twoelements A and B form compounds having formula AB2and AB4.When dissolved in 20 g of benzene (C6H6),1 g of AB2lowers the freezing point by 2.3 Kwhereas 1.0 g of AB4lowers it by 1.3 K.The molar depression constant for benzene is 5.1 Kkg mol−1.Calculate atomic masses of A and B.

Difference between male and female merchantia

42. In which of the following molecules/ions BF3 NO2,NH2- and H2O, the central atom is sp2 hybridized?\lbrack AIPMT (Prelims)-2009\rbrack(1) NH2 and H2O(2) NO2 and H2O 3)BF3, and NO-(4) NO2 and NH2

If the weight of hydrogen in a sample of Ammonia is 30g. Find the weight of the sample ?how to find this weight by taking out no. of moles?

Graphically explain why a solution obtained by adding a non volatile solute in a solvent boils at higher temperature than the pure solvent

112.A satellite of mass m is revolving close to surface of a planet of density d with time period T. The value of G on planet is??

The commonly used analgesic that does not lead to addiction is

In the following monobromination reaction, the number of possible chiral product(s) is/are:

A substance AxBy crystallises in a FCC lattice. Atoms `A' occupy each corner of the cube and atoms `B' occupy the centres of each face of the cube. The correct composition of AxBy is

if boiling point difference is high between 2 comp. then which distillation we use ? ex.phenol & acetone.

What is the difference between aq. Solution of slaked lime(lime water) and suspension of slaked lime in water(milk of lime)

Aqueous solutions in the order of their increasing boiling points1) 0.0001 M NaCl2)0.001 M MgCl23)0.001 M urea4) 0.001 M Nacl

The maximum number of isomeric alkenes with the molecularformulae C4H8, is 1. 2 2. 3 3. 4 4. 5 Aid with explanatio

The magnitude of surface tension of liquid depends on the attractive forces between the molecules. Arrange the following in increasing order of surface tension: Water, alcohol (C2H5OH) and hexane [CH3(CH2)4CH3)]

34. What is the molarity and molality of 10% NaoH (w/v) solution?

London forcees

A cylinder contain hydrogen gas at pressure of 249kPa and temperature 27o C its density is:(R=8.3Jmol−1k−1)

24. Carbon reduction of ZnO is not possible below 1180K .why?

A gas contained in a cylinder fitted with a frictionless piston expands against a constant pressure 1 atmosphere from a volume of 4 litre to a volume of 14 litre. In doing so, it absorbs 800 J thermal energy from surrounding . Determine △U for the process.

Calculate number of neutron in one drop of water if 1.8ml= 10 drop

Diethylamine + Acetyl chloride reacts with pyridine /heat to give

What is the number of angular node, nodal plane and radial nodes in a 3dz^2 orbital. Is there any exceptoin in this?

3. Why nh3 have high dipole moment than nf3

Q 50/75 If in the given reaction, 3I2 + OH I03 5I 2 moles ofiodine are taken, then the ratio of iodate and iodide ions formed inthe alkaline medium is

Gay -Lusacc 's law of combining volumes

11. How extra electrolyte can cause slowly precipitation of colloidal solution?

What is 2.116 (bar on 16) in p/q form?

A sweet smelling compounds formed by reacting acetic acid with ethanol in the presence of sulphuric acid is

Calculate the wavelength of an electron moving with a velocity of 2.05 × 107ms–1.

34.Equivalent mass of oxalic acid

90.Derive Avogadro 's law from kinetic gas theory?

Is black hole a black body?

The number of isomeric forms that are represented by aromatic homocyclic compound C7H9N is

{ †ext { Consider the following reaction: } } { aC _ { 6 } H _ { 6 } + bO _ { 2 } → CCO _ { 2 } + dH _ { 2 } O } { †ext { On balancing, the ratio } b : c †ext { is }

Which of the following compounds is the most acidic?

Why is nitric acid added to sodium extract before adding silver nitrate for testing halogens?

why is the law of conservation of mass not applicable for nuclear reactions ?

What type of solvent increase the rate of Sn1and Sn2 reaction

In the first order reaction NH4NO2(aq)→N2(g)+2H2O(l), the volume of N2 after 20 min and after completion of reaction are 40 mL and 70 mL respectively. The value of rate constant is :Take:log73=0.37

what is density

Arrange the following compounds in the increasing order of their acidic strength: i. M – nitrophenol ii. M – cresol iii. Phenol iv. M – cholorophenol

Retrouvez les phrases suivantes.1. appelle/Sia/je/m'.2. à/habite/Paris/j'.3. bien/vais/je/merci.4. cinq/ai/ans/j'.

ΔH<ΔE for the reaction: