46295 + Interview Questions in Chemistry

1.	ph of a saturated solution of Ca(OH)2 is 9. The solubility product(Ksp ) of Ca(OH)2 is
Answer» ph of a saturated solution of $C a {(O H)}_{2}$ is 9. The solubility product( $K_{s p}$ ) of ${C a (O H)}_{2}$ is

Discussion

2.	Which of the following is most reactive towards nuclephilic substitution reaction?
Answer» Which of the following is most reactive towards nuclephilic substitution reaction?

Discussion

3.	Thedecomposition of NH3on platinum surface is zero order reaction. What are the rates ofproduction of N2and H2if k =2.5 × 10−4mol−1L s−1?
Answer» The decomposition of NH₃ on platinum surface is zero order reaction. What are the rates of production of N₂ and H₂ if k = 2.5 × 10⁻⁴ mol⁻¹ L s⁻¹?

Discussion

4.	Which of the following species has lowest ionisation enthalpy?
Answer» Which of the following species has lowest ionisation enthalpy?

Discussion

5.	How to calculate volume strengrh and concn terms in hydrogen chapter
Answer» How to calculate volume strengrh and concn terms in hydrogen chapter

Discussion

6.	In body−centered cubic cell (BCC) of lattice parameter a, the atomic radius is −
Answer» In body−centered cubic cell (BCC) of lattice parameter a, the atomic radius is −

Discussion

7.	Question 1Which of the following are matter?Chair, air, love, smell, hate, almonds, thought, cold, cold drink, smell of perfume.
Answer» Question 1 Which of the following are matter? Chair, air, love, smell, hate, almonds, thought, cold, cold drink, smell of perfume.

Discussion

8.	Question 41Compute the difference in masses of one mole each of aluminium atoms and one mole of its ions. (Mass of an electron is 9.1×10−28g) which one is heavier?
Answer» Question 41 Compute the difference in masses of one mole each of aluminium atoms and one mole of its ions. (Mass of an electron is $9.1 \times 10^{- 28} g)$ which one is heavier?

Discussion

9.	Payload is defined as the difference between the mass of displaced airand the mass of the balloon. Calculate the pay load when a balloon ofradius 10 m, mass 100 kg is filled with helium at 1.66 bar at 27°C.(Density of air = 1.2 kg m–3and R = 0.083 bar dm3K–1mol–1).
Answer» Pay load is defined as the difference between the mass of displaced air and the mass of the balloon. Calculate the pay load when a balloon of radius 10 m, mass 100 kg is filled with helium at 1.66 bar at 27°C. (Density of air = 1.2 kg m^–³ and R = 0.083 bar dm³ K^–¹ mol^–¹).

Discussion

10.	Which of the following is the configuration of noble gas?
Answer» Which of the following is the configuration of noble gas?

Discussion

11.	55 The bond dissociation energies of H-H, C-C and C-H bonds respectively are 104.2, 83.1, and 98.8 kcal/mol. The electronegativity of carbon is a) 2.50 b) 2.51 c) 2.53 d) 2.52
Answer» 55 The bond dissociation energies of H-H, C-C and C-H bonds respectively are 104.2, 83.1, and 98.8 kcal/mol. The electronegativity of carbon is a) 2.50 b) 2.51 c) 2.53 d) 2.52

Discussion

12.	Which is the correct order for ionic radii?
Answer» Which is the correct order for ionic radii?

Discussion

13.	Why alkenes have absence of Pi electron
Answer» Why alkenes have absence of Pi electron

Discussion

14.	Can oxidation of alkene to formaldehyde be done using k2cr2o7
Answer» Can oxidation of alkene to formaldehyde be done using k2cr2o7

Discussion

15.	[Ni(CN)4]2⊖ and [NiCl4]2⊖ are dissimilar with respect to
Answer» $[N i (C N)_{4}]^{2 ⊖}$ and $[N i C l_{4}]^{2 ⊖}$ are dissimilar with respect to

Discussion

16.	29. interpret the statement and explain a) A bcc lattice has 2 lattice point in in its unit cell use diagrams to clear the concept
Answer» 29. interpret the statement and explain a) A bcc lattice has 2 lattice point in in its unit cell use diagrams to clear the concept

Discussion

17.	Which of the following is/are semiconductors?
Answer» Which of the following is/are semiconductors?

Discussion

18.	58. The benzylic free radical is aromatic because it contains no. of p orbitals and no. of unpaired electrons .
Answer» 58. The benzylic free radical is aromatic because it contains no. of p orbitals and no. of unpaired electrons .

Discussion

19.	Two volatile liquids A and B are mixed together in a ratio of 3:2 by mole to form an ideal solution.Calculate the total pressure of the solution Given:Vapour pressure of pure A, (p∘A)=200 mm HgVapour pressure of pure B, (p∘B)=50 mm Hg
Answer» Two volatile liquids A and B are mixed together in a ratio of $3 : 2$ by mole to form an ideal solution. Calculate the total pressure of the solution Given: $Vapour pressure of pure A, (p_{A}^{\circ}) = 200 m m H g$ $Vapour pressure of pure B, (p_{B}^{\circ}) = 50 m m H g$

Discussion

20.	For a cell, terminal potential difference is 2.2V when circuit is open and reduces to 1.8V when cell is connected to a resistance of R=5 ohm. Determine the internal resistance of the cell.
Answer» For a cell, terminal potential difference is 2.2V when circuit is open and reduces to 1.8V when cell is connected to a resistance of R=5 ohm. Determine the internal resistance of the cell.

Discussion

21.	As the nuclear force is the strongest force in the known universe, what will be it's equation and what will be the value of its constant?
Answer» As the nuclear force is the strongest force in the known universe, what will be it's equation and what will be the value of its constant?

Discussion

22.	The correct order of O−O bond length in O2,H2O2 and O3 is:
Answer» The correct order of $O - O$ bond length in $O_{2}, H_{2} O_{2}$ and $O_{3}$ is:

Discussion

23.	9.8g of H2SO4 is present in 2 litres of a solution. The molarity of the solution is:
Answer» 9.8g of H₂SO₄is present in 2 litres of a solution. The molarity of the solution is:

Discussion

24.	Why do ionic compounds have high melting points?
Answer» Why do ionic compounds have high melting points?

Discussion

25.	For the reaction,4NH3(g) + 502(g) → 4N0(g) + 6H20,when 1 mol of ammonia and 1 mol of O2, are allowed to react then choos(1) 1 mol of H2O is produced(2) 1 mol of NO is produced(3) All the oxygen will be consumed) All the ammonia will be consumed why O2 is limiting reagent??
Answer» For the reaction,4NH3(g) + 502(g) → 4N0(g) + 6H20,when 1 mol of ammonia and 1 mol of O2, are allowed to react then choos(1) 1 mol of H2O is produced(2) 1 mol of NO is produced(3) All the oxygen will be consumed) All the ammonia will be consumed why O2 is limiting reagent??

Discussion

26.	In the formation of ehtylene molecule carbon atom makes use of (1) sp3(2)sp2(3)sp(4)dsp2
Answer» In the formation of ehtylene molecule carbon atom makes use of (1) sp3 (2)sp2 (3)sp (4)dsp2

Discussion

27.	When the velocity of a relativistic charged particle increases, its specific chargeHow to solve it.
Answer» When the velocity of a relativistic charged particle increases, its specific charge How to solve it.

Discussion

28.	29. Property of matter and their measurement
Answer» 29. Property of matter and their measurement

Discussion

29.	The CsCl type structure is exhibited by alkali halides only when the radius of the cation is large enough to keep touching its eight nearest neighbour anions. Below what minimum ratio of cation to anion radii (r+r−) this contact is prevented ?
Answer» The CsCl type structure is exhibited by alkali halides only when the radius of the cation is large enough to keep touching its eight nearest neighbour anions. Below what minimum ratio of cation to anion radii $(\frac{r_{+}}{r_{-}})$ this contact is prevented ?

Discussion

30.	The total number of lone-pairs of electrons in melamine is
Answer» The total number of lone-pairs of electrons in melamine is

Discussion

31.	Water rises to a height of 20 mm in a capillary
Answer» Water rises to a height of 20 mm in a capillary

Discussion

32.	When ether is exposed to air for sometime an explosive substance obtained is
Answer» When ether is exposed to air for sometime an explosive substance obtained is

Discussion

33.	It is because of the inability of ns2 electrons of the valence shell to participate in bonding that
Answer» It is because of the inability of $n s^{2}$ electrons of the valence shell to participate in bonding that

Discussion

34.	among the foll the strongest nucleophile is: 1.C2H5SH 2.CH3COO- 3. CH3NH2 4. NCCH2
Answer» among the foll the strongest nucleophile is: 1.C2H5SH 2.CH3COO- 3. CH3NH2 4. NCCH2

Discussion

35.	A molecule should:
Answer» A molecule should:

Discussion

36.	what is lanthanoid contraction? what are its consequences?
Answer» what is lanthanoid contraction? what are its consequences?

Discussion

37.	7.5 ml of a gaseous hydrocarbon was burnt with excess oxygen. On cooling the volume contracted by 15 ml Find the formula of the hydrocarbon if the vapour density is 14
Answer» 7.5 ml of a gaseous hydrocarbon was burnt with excess oxygen. On cooling the volume contracted by 15 ml Find the formula of the hydrocarbon if the vapour density is 14

Discussion

38.	Determine the heat of transformation of C(diamond)→ C(graphite) from the following data. C(diamond)+O2(g)→CO2(g) △H=−94.5Kcal C(graphite)+O2(g)→CO2(g) △H=−94.0Kcal
Answer» Determine the heat of transformation of C(diamond)→ C(graphite) from the following data. $C_{(d i a m o n d)} + O_{2} (g) \to C O_{2} (g) △ H = - 94.5 K c a l$ $C_{(g r a p h i t e)} + O_{2} (g) \to C O_{2} (g) △ H = - 94.0 K c a l$

Discussion

39.	Examples of solutions
Answer» Examples of solutions

Discussion

40.	Vapour density of A=3V, D= B, molecular weight of A is 90, molecular weight of B is??
Answer» Vapour density of A=3V, D= B, molecular weight of A is 90, molecular weight of B is??

Discussion

41.	Explain the variation in ionisation enthalpies across a period and down the group.
Answer» Explain the variation in ionisation enthalpies across a period and down the group.

Discussion

42.	The water image of the following figure isनिम्नलिखित चित्र का जल प्रतिबिम्ब है
Answer» The water image of the following figure is निम्नलिखित चित्र का जल प्रतिबिम्ब है

Discussion

43.	The molality of a urea solution in which 0.0200 g of urea (NH2CONH2) is added to 0.400 dm3 of water at STP is
Answer» The molality of a urea solution in which 0.0200 g of urea $(N H_{2} C O N H_{2})$ is added to $0.400 d m^{3}$ of water at STP is

Discussion

44.	What is the formula and molecular mass of urea?
Answer» What is the formula and molecular mass of urea?

Discussion

45.	32. A uniform string resonates with a tuning fork, at amaximum tension of 32 N. If it is divided into twosegments by placing a wedge at a distance one-fourth of length from one end, then to resonancewith same frequency the maximum value of tensionfor string will be(1) 2 N(3) 8 N(2) 4 N(4) 16 N
Answer» 32. A uniform string resonates with a tuning fork, at amaximum tension of 32 N. If it is divided into twosegments by placing a wedge at a distance one-fourth of length from one end, then to resonancewith same frequency the maximum value of tensionfor string will be(1) 2 N(3) 8 N(2) 4 N(4) 16 N

Discussion

46.	Which of the following compounds exhibits optical isomerism
Answer» Which of the following compounds exhibits optical isomerism

Discussion

47.	Which of the following anion has the lowest hydration enthalpy?
Answer» Which of the following anion has the lowest hydration enthalpy?

Discussion

48.	Question 3Classify the following changes into reversible and irreversible changes: Boiling of water Melting of wax Burning of paper Stretching of a spring Growth of a plant Ageing of man
Answer» Question 3 Classify the following changes into reversible and irreversible changes: Boiling of water Melting of wax Burning of paper Stretching of a spring Growth of a plant Ageing of man

48.

Question 3Classify the following changes into reversible and irreversible changes: Boiling of water Melting of wax Burning of paper Stretching of a spring Growth of a plant Ageing of man

Answer»

Question 3

Classify the following changes into reversible and irreversible changes:

Boiling of water

Melting of wax

Burning of paper

Stretching of a spring

Growth of a plant

Ageing of man

Discussion

49.	16. Henry's law constant for dissolution of CH_4 in benzene at 298K is 2\ast10^5 mm of Hg. Then solubility of CH_4 in benzene at 298K under 760mm of Hg is: 1) 1.2\ast10^{-5} 2)3.8\ast10^{-3} 3)4\ast10^{-7} 4)1\ast10^{-2
Answer» 16. Henry's law constant for dissolution of CH_4 in benzene at 298K is 2\ast10^5 mm of Hg. Then solubility of CH_4 in benzene at 298K under 760mm of Hg is: 1) 1.2\ast10^{-5} 2)3.8\ast10^{-3} 3)4\ast10^{-7} 4)1\ast10^{-2

Discussion

50.	A compound contains two types of atoms X and Y. Its crystal structure is cubic lattice with X atoms at the corner of the unit cells and Y atoms at the face centre. The simplest formula of the compound is
Answer» A compound contains two types of atoms $X$ and $Y$ . Its crystal structure is cubic lattice with $X$ atoms at the corner of the unit cells and $Y$ atoms at the face centre. The simplest formula of the compound is

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

ph of a saturated solution of Ca(OH)2 is 9. The solubility product(Ksp ) of Ca(OH)2 is

Which of the following is most reactive towards nuclephilic substitution reaction?

Thedecomposition of NH3on platinum surface is zero order reaction. What are the rates ofproduction of N2and H2if k =2.5 × 10−4mol−1L s−1?

Which of the following species has lowest ionisation enthalpy?

How to calculate volume strengrh and concn terms in hydrogen chapter

In body−centered cubic cell (BCC) of lattice parameter a, the atomic radius is −

Question 1Which of the following are matter?Chair, air, love, smell, hate, almonds, thought, cold, cold drink, smell of perfume.

Question 41Compute the difference in masses of one mole each of aluminium atoms and one mole of its ions. (Mass of an electron is 9.1×10−28g) which one is heavier?

Payload is defined as the difference between the mass of displaced airand the mass of the balloon. Calculate the pay load when a balloon ofradius 10 m, mass 100 kg is filled with helium at 1.66 bar at 27°C.(Density of air = 1.2 kg m–3and R = 0.083 bar dm3K–1mol–1).

Which of the following is the configuration of noble gas?

55 The bond dissociation energies of H-H, C-C and C-H bonds respectively are 104.2, 83.1, and 98.8 kcal/mol. The electronegativity of carbon is a) 2.50 b) 2.51 c) 2.53 d) 2.52

Which is the correct order for ionic radii?

Why alkenes have absence of Pi electron

Can oxidation of alkene to formaldehyde be done using k2cr2o7

[Ni(CN)4]2⊖ and [NiCl4]2⊖ are dissimilar with respect to

29. interpret the statement and explain a) A bcc lattice has 2 lattice point in in its unit cell use diagrams to clear the concept

Which of the following is/are semiconductors?

58. The benzylic free radical is aromatic because it contains no. of p orbitals and no. of unpaired electrons .

Two volatile liquids A and B are mixed together in a ratio of 3:2 by mole to form an ideal solution.Calculate the total pressure of the solution Given:Vapour pressure of pure A, (p∘A)=200 mm HgVapour pressure of pure B, (p∘B)=50 mm Hg

For a cell, terminal potential difference is 2.2V when circuit is open and reduces to 1.8V when cell is connected to a resistance of R=5 ohm. Determine the internal resistance of the cell.

As the nuclear force is the strongest force in the known universe, what will be it's equation and what will be the value of its constant?

The correct order of O−O bond length in O2,H2O2 and O3 is:

9.8g of H2SO4 is present in 2 litres of a solution. The molarity of the solution is:

Why do ionic compounds have high melting points?

For the reaction,4NH3(g) + 502(g) → 4N0(g) + 6H20,when 1 mol of ammonia and 1 mol of O2, are allowed to react then choos(1) 1 mol of H2O is produced(2) 1 mol of NO is produced(3) All the oxygen will be consumed) All the ammonia will be consumed why O2 is limiting reagent??

In the formation of ehtylene molecule carbon atom makes use of (1) sp3(2)sp2(3)sp(4)dsp2

When the velocity of a relativistic charged particle increases, its specific chargeHow to solve it.

29. Property of matter and their measurement

The CsCl type structure is exhibited by alkali halides only when the radius of the cation is large enough to keep touching its eight nearest neighbour anions. Below what minimum ratio of cation to anion radii (r+r−) this contact is prevented ?

The total number of lone-pairs of electrons in melamine is

Water rises to a height of 20 mm in a capillary

When ether is exposed to air for sometime an explosive substance obtained is

It is because of the inability of ns2 electrons of the valence shell to participate in bonding that

among the foll the strongest nucleophile is: 1.C2H5SH 2.CH3COO- 3. CH3NH2 4. NCCH2

A molecule should:

what is lanthanoid contraction? what are its consequences?

7.5 ml of a gaseous hydrocarbon was burnt with excess oxygen. On cooling the volume contracted by 15 ml Find the formula of the hydrocarbon if the vapour density is 14

Determine the heat of transformation of C(diamond)→ C(graphite) from the following data. C(diamond)+O2(g)→CO2(g) △H=−94.5Kcal C(graphite)+O2(g)→CO2(g) △H=−94.0Kcal

Examples of solutions

Vapour density of A=3V, D= B, molecular weight of A is 90, molecular weight of B is??

Explain the variation in ionisation enthalpies across a period and down the group.

The water image of the following figure isनिम्नलिखित चित्र का जल प्रतिबिम्ब है

The molality of a urea solution in which 0.0200 g of urea (NH2CONH2) is added to 0.400 dm3 of water at STP is

What is the formula and molecular mass of urea?

32. A uniform string resonates with a tuning fork, at amaximum tension of 32 N. If it is divided into twosegments by placing a wedge at a distance one-fourth of length from one end, then to resonancewith same frequency the maximum value of tensionfor string will be(1) 2 N(3) 8 N(2) 4 N(4) 16 N

Which of the following compounds exhibits optical isomerism

Which of the following anion has the lowest hydration enthalpy?

Question 3Classify the following changes into reversible and irreversible changes: Boiling of water Melting of wax Burning of paper Stretching of a spring Growth of a plant Ageing of man

16. Henry's law constant for dissolution of CH_4 in benzene at 298K is 2\ast10^5 mm of Hg. Then solubility of CH_4 in benzene at 298K under 760mm of Hg is: 1) 1.2\ast10^{-5} 2)3.8\ast10^{-3} 3)4\ast10^{-7} 4)1\ast10^{-2

A compound contains two types of atoms X and Y. Its crystal structure is cubic lattice with X atoms at the corner of the unit cells and Y atoms at the face centre. The simplest formula of the compound is