46295 + Interview Questions in Chemistry

1.	:N≡ N→:\overset{†extbullet†extbullet}O: find non bonding electrons in lewis structure of central nitrogen atom.why is it not zero?
Answer» :N≡ N→:\overset{†extbullet†extbullet}O: find non bonding electrons in lewis structure of central nitrogen atom.why is it not zero?

Discussion

2.	In van der Waals equation at constant temperature 300 K, if a=1.4 atm L2 mol−2, V=100 mL, n=1 mol, then what is the pressure of the gas?
Answer» In van der Waals equation at constant temperature $300 K$ , if $a = 1.4 a t m L^{2} m o l^{- 2}$ , $V = 100 m L$ , $n = 1 m o l$ , then what is the pressure of the gas?

Discussion

3.	Write three characteristics of an ideal fuel.
Answer» Write three characteristics of an ideal fuel.

Discussion

4.	An example of reaction in which precipitate is formed is:
Answer» An example of reaction in which precipitate is formed is:

Discussion

5.	Predict the formula of the stable binary compounds that would be formed by the combination of the following pairs of elements. (a) Lithium and oxygen (b) Magnesium and nitrogen (c) Aluminium and iodine (d) Silicon and oxygen (e) Phosphorus and fluorine (f) Element 71 and fluorine
Answer» Predict the formula of the stable binary compounds that would be formed by the combination of the following pairs of elements. (a) Lithium and oxygen (b) Magnesium and nitrogen (c) Aluminium and iodine (d) Silicon and oxygen (e) Phosphorus and fluorine (f) Element 71 and fluorine

Discussion

6.	How are vitamins classified ? Name the vitamin responsible for the coagulation of blood.
Answer» How are vitamins classified ? Name the vitamin responsible for the coagulation of blood.

Discussion

7.	explain how to predict the shape of NH3 and XeO3?
Answer» explain how to predict the shape of NH3 and XeO3?

Discussion

8.	Composition of Siderite is
Answer» Composition of Siderite is

Discussion

9.	28.When m-bromobenzoic acid is treated with socl2 gives A and when A is treated with NH3 it gives B.B on reaction with Naoh+Br2 gives C. Identify C.
Answer» 28.When m-bromobenzoic acid is treated with socl2 gives A and when A is treated with NH3 it gives B.B on reaction with Naoh+Br2 gives C. Identify C.

Discussion

10.	17.Define azeotrope and its two types(maximum boiling azeotrope and minimum boiling azeotrope).
Answer» 17.Define azeotrope and its two types(maximum boiling azeotrope and minimum boiling azeotrope).

Discussion

11.	The number of atoms (z) in simple cubic unit cell is
Answer» The number of atoms (z) in simple cubic unit cell is

Discussion

12.	Can lindars catalyst reduce cyanide and ketone
Answer» Can lindars catalyst reduce cyanide and ketone

Discussion

13.	Calculate the pH at which an acid indicator (HIn) having KIn=10−5 changes its colour. Given, the HIn concentration is 10−3 M.
Answer» Calculate the $p H$ at which an acid indicator $(H I n)$ having $K_{I n} = 10^{- 5}$ changes its colour. Given, the $H I n$ concentration is $10^{- 3} M$ .

Discussion

14.	Biodegradable polymer which can be produced from glycine and aminocaproic acid is
Answer» Biodegradable polymer which can be produced from glycine and aminocaproic acid is

Discussion

15.	How many g of diabasic acid ( mw =200)should be present in 100 ml of aqueous solution to give strength of 0.1 N
Answer» How many g of diabasic acid ( mw =200)should be present in 100 ml of aqueous solution to give strength of 0.1 N

Discussion

16.	CsBr crystallises in a body centred cubic latticeThe unit cell length is 436.6 pm. Given that the atomicmass of Cs 133 and that of Br 80 amu andAvagadro number being 6.02x 102 mol1, the densityof CsBr isAIPMT (Prelims)-2006(2) 0.425 g/cm3(1) 42.5 g/cm(4) 4.25 g/cm(3) 8.25 g/cm
Answer» CsBr crystallises in a body centred cubic latticeThe unit cell length is 436.6 pm. Given that the atomicmass of Cs 133 and that of Br 80 amu andAvagadro number being 6.02x 102 mol1, the densityof CsBr isAIPMT (Prelims)-2006(2) 0.425 g/cm3(1) 42.5 g/cm(4) 4.25 g/cm(3) 8.25 g/cm

Discussion

17.	in which of the following ,bond angle is nearly 90^°? a)NH_3 b)H_2O c)H_2S d)C_2H_6
Answer» in which of the following ,bond angle is nearly 90^°? a)NH_3 b)H_2O c)H_2S d)C_2H_6

Discussion

18.	What are laws of vector?
Answer» What are laws of vector?

Discussion

19.	The standard reduction potential of Pb and Zn electrodes are – 0.126 and -0.763 volts respectively. The e.m.f of the cell Zn\|Zn2+(0.1M)\|\|Pb2+(1M)\|Pb is
Answer» The standard reduction potential of Pb and Zn electrodes are – 0.126 and -0.763 volts respectively. The e.m.f of the cell $Z n \| Z n^{2 +} (0.1 M) \| \| P b^{2 +} (1 M) \| P b$ is

Discussion

20.	Write some physical properties of oxygen gas.
Answer» Write some physical properties of oxygen gas.

Discussion

21.	In adiabatic heat is constant implies temperature is constant and in isothermal process temperature is constant did we say that isothermal is adiabtatic process are same
Answer» In adiabatic heat is constant implies temperature is constant and in isothermal process temperature is constant did we say that isothermal is adiabtatic process are same

Discussion

22.	a bar =2i^+3j^+4k^b=I^+j^+k^\|A bar- Bbar\|
Answer» a bar =2i^+3j^+4k^ b=I^+j^+k^ \|A bar- Bbar\|

Discussion

23.	A cons†an t current of 30A is passed through an aq.NaCl solution for a time of 2 hours. Thus NaOh formed i
Answer» A cons†an t current of 30A is passed through an aq.NaCl solution for a time of 2 hours. Thus NaOh formed i

Discussion

24.	Peptides on hydrolysis gives what??(A) Ammonia(B) Amines(C) Amino Acids(D) Hydroxy AcidsWhat??
Answer» Peptides on hydrolysis gives what?? (A) Ammonia (B) Amines (C) Amino Acids (D) Hydroxy Acids What??

Discussion

25.	31. calculate wavelength of O2 molecule if its velocity is 1/10 of the speed od light?
Answer» 31. calculate wavelength of O2 molecule if its velocity is 1/10 of the speed od light?

Discussion

26.	Are all salts strong electrolytes?
Answer» Are all salts strong electrolytes?

Discussion

27.	One mole of an ideal gas at 300 K is expanded isothermally from an initial volume of 1 litre to 10 litres. The value of △U for this process is:(R=2 cal mol−1 K−1)
Answer» One mole of an ideal gas at $300 K$ is expanded isothermally from an initial volume of $1$ litre to $10$ litres. The value of $△ U$ for this process is: $(R = 2 {cal mol}^{- 1} K^{- 1})$

Discussion

28.	The products "A" and "B" formed in above reactions are:
Answer» The products "A" and "B" formed in above reactions are:

Discussion

29.	What type of defect can arise when a solid is heated? Which physical property is affected by it and in what way?
Answer» What type of defect can arise when a solid is heated? Which physical property is affected by it and in what way?

Discussion

30.	50 ml of a solution containing 10−3 mol of Ag+ is mixed with 50 ml of a 0.1 M HCl solution. How much Ag+ remains in solution? (Ksp of AgCl=1.0×10−10)
Answer» 50 ml of a solution containing $10^{- 3} m o l$ of $A g^{+}$ is mixed with 50 ml of a 0.1 M HCl solution. How much $A g^{+}$ remains in solution? $(K_{s p} of A g C l = 1.0 \times 10^{- 10})$

Discussion

31.	When one mole of univalent salt AB is dissolved in water at 300 K, 3.7 kJ of heat is absorbed and △G of the process is −8.3 kJ. What is the value of △S for the process?
Answer» When one mole of univalent salt AB is dissolved in water at $300 K$ , $3.7 k J$ of heat is absorbed and $△ G$ of the process is $- 8.3 k J$ . What is the value of $△ S$ for the process?

Discussion

32.	18. What is hydride. Can water be called oxygen dihydride
Answer» 18. What is hydride. Can water be called oxygen dihydride

Discussion

33.	Eqⁿ => 2Mg + O2 -----> 2MgOVerify that -- "Gram Equivalents[G.Eq] of Mg = G.Eq. of O2 = G.Eq of MgO"
Answer» Eqⁿ => 2Mg + O2 -----> 2MgO Verify that -- "Gram Equivalents[G.Eq] of Mg = G.Eq. of O2 = G.Eq of MgO"

Discussion

34.	What is enthalpy of uranium?
Answer» What is enthalpy of uranium?

Discussion

35.	A 5.25% solution of a substance is isotonic with a 1.5% solution of urea (molecular mass = 60g/mole) in the same solvent . If the densities of both the solutions are assumed to be equal to 1g/cc, molar mass of substance will be
Answer» A 5.25% solution of a substance is isotonic with a 1.5% solution of urea (molecular mass = 60g/mole) in the same solvent . If the densities of both the solutions are assumed to be equal to 1g/cc, molar mass of substance will be

Discussion

36.	At 27∘C, three moles of an ideal diatomic gas occupy a volume V. If the gas expands adiabatically to a volume 3V, calculate the work done by the gas during the process. (R=8.31 J/mol-K,30.4=1.55)
Answer» At $27^{\circ} C$ , three moles of an ideal diatomic gas occupy a volume $V$ . If the gas expands adiabatically to a volume $3 V$ , calculate the work done by the gas during the process. $(R = 8.31 J/mol-K, 3^{0.4} = 1.55)$

Discussion

37.	The sample of Alf3 contains 3.0 * 10^24 f^- ions. The number of formula units of this sample are (In this question what is the meaning of formula unit?)
Answer» The sample of Alf3 contains 3.0 * 10^24 f^- ions. The number of formula units of this sample are (In this question what is the meaning of formula unit?)

Discussion

38.	Molecular weight of KMnO4 in acidic medium and neutral medium will be respectively :
Answer» Molecular weight of $K M n O_{4}$ in acidic medium and neutral medium will be respectively :

Discussion

39.	The number of valence electrons in the elements A and B are 3 and 6 respectively. The most probable compound formed from A and B is:
Answer» The number of valence electrons in the elements A and B are 3 and 6 respectively. The most probable compound formed from A and B is:

Discussion

40.	the order of E2 elimination for alkyl halides is what? among 1^° ,2^° and 3 .compare it with E1 too.
Answer» the order of E2 elimination for alkyl halides is what? among 1^° ,2^° and 3 .compare it with E1 too.

Discussion

41.	differencebetween thermal equilibrium and thermodynamic equilibriu
Answer» differencebetween thermal equilibrium and thermodynamic equilibriu

Discussion

42.	5. If 50.2 then Which one is correct exactly A. 1 B. 1.0
Answer» 5. If 50.2 then Which one is correct exactly A. 1 B. 1.0

Discussion

43.	An Ideal Gas at 1 bar is heated from Oo C to 373K. If its initial volume is 5.46L, the final volume could be
Answer» An Ideal Gas at 1 bar is heated from $O^{o} C$ to 373K. If its initial volume is 5.46L, the final volume could be

Discussion

44.	8. An excited hydrogen atom when comes directly to the ground state emits a photoelectron with de broglie wavelength 4.09 Armstrong. If work function of metal is 3.75ev find out the no of orbit of hydrogen atom in which electron was present initially.
Answer» 8. An excited hydrogen atom when comes directly to the ground state emits a photoelectron with de broglie wavelength 4.09 Armstrong. If work function of metal is 3.75ev find out the no of orbit of hydrogen atom in which electron was present initially.

Discussion

45.	How did scientists come up with the value of 1 mole =6.022×1023?
Answer» How did scientists come up with the value of 1 mole $= 6.022 \times 10^{23}$ ?

Discussion

46.	39. For a radioactive wire if alpha radiation emitted from the end A and beta radiation emitted from the end B . what is direction of induced current in wire ?
Answer» 39. For a radioactive wire if alpha radiation emitted from the end A and beta radiation emitted from the end B . what is direction of induced current in wire ?

Discussion

47.	Consider following reaction sequence.(D) has x number of double bond equivalents, the number of double bonds in (D) is y, the number of all stereoisomers of (D) is z. What is the value of x + y + z?
Answer» Consider following reaction sequence. (D) has x number of double bond equivalents, the number of double bonds in (D) is y, the number of all stereoisomers of (D) is z. What is the value of x + y + z?

Discussion

48.	The radius of a He atom is 1×10−9 cm. A 492.6 cm3 container is filled with He at a pressure of 1 atm and a temperature of 300 K . The volume that is occupied by He atom is x×10−6 cm3. Value of x is:(x is rounded off to nearest integer)(Given: R=0.0821 L atm K−1mol−1, π=227 and NA=6×1023)
Answer» The radius of a $H e$ atom is $1 \times 10^{- 9} cm$ . A $492.6$ $c m^{3}$ container is filled with He at a pressure of $1$ atm and a temperature of $300 K$ . The volume that is occupied by $H e$ atom is $x \times 10^{- 6} {cm}^{3}$ . Value of $x$ is: (x is rounded off to nearest integer) $(G i v e n : R = 0.0821 L a t m K^{- 1} m o l^{- 1}, π = \frac{22}{7} a n d N_{A} = 6 \times 10^{23}$ )

Discussion

49.	Is tin more reactive than zinc?
Answer» Is tin more reactive than zinc?

Discussion

50.	If -1
Answer» If -1

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

:N≡ N→:\overset{†extbullet†extbullet}O: find non bonding electrons in lewis structure of central nitrogen atom.why is it not zero?

In van der Waals equation at constant temperature 300 K, if a=1.4 atm L2 mol−2, V=100 mL, n=1 mol, then what is the pressure of the gas?

Write three characteristics of an ideal fuel.

An example of reaction in which precipitate is formed is:

Predict the formula of the stable binary compounds that would be formed by the combination of the following pairs of elements. (a) Lithium and oxygen (b) Magnesium and nitrogen (c) Aluminium and iodine (d) Silicon and oxygen (e) Phosphorus and fluorine (f) Element 71 and fluorine

How are vitamins classified ? Name the vitamin responsible for the coagulation of blood.

explain how to predict the shape of NH3 and XeO3?

Composition of Siderite is

28.When m-bromobenzoic acid is treated with socl2 gives A and when A is treated with NH3 it gives B.B on reaction with Naoh+Br2 gives C. Identify C.

17.Define azeotrope and its two types(maximum boiling azeotrope and minimum boiling azeotrope).

The number of atoms (z) in simple cubic unit cell is

Can lindars catalyst reduce cyanide and ketone

Calculate the pH at which an acid indicator (HIn) having KIn=10−5 changes its colour. Given, the HIn concentration is 10−3 M.

Biodegradable polymer which can be produced from glycine and aminocaproic acid is

How many g of diabasic acid ( mw =200)should be present in 100 ml of aqueous solution to give strength of 0.1 N

CsBr crystallises in a body centred cubic latticeThe unit cell length is 436.6 pm. Given that the atomicmass of Cs 133 and that of Br 80 amu andAvagadro number being 6.02x 102 mol1, the densityof CsBr isAIPMT (Prelims)-2006(2) 0.425 g/cm3(1) 42.5 g/cm(4) 4.25 g/cm(3) 8.25 g/cm

in which of the following ,bond angle is nearly 90^°? a)NH_3 b)H_2O c)H_2S d)C_2H_6

What are laws of vector?

The standard reduction potential of Pb and Zn electrodes are – 0.126 and -0.763 volts respectively. The e.m.f of the cell Zn|Zn2+(0.1M)||Pb2+(1M)|Pb is

Write some physical properties of oxygen gas.

In adiabatic heat is constant implies temperature is constant and in isothermal process temperature is constant did we say that isothermal is adiabtatic process are same

a bar =2i^+3j^+4k^b=I^+j^+k^|A bar- Bbar|

A cons†an t current of 30A is passed through an aq.NaCl solution for a time of 2 hours. Thus NaOh formed i

Peptides on hydrolysis gives what??(A) Ammonia(B) Amines(C) Amino Acids(D) Hydroxy AcidsWhat??

31. calculate wavelength of O2 molecule if its velocity is 1/10 of the speed od light?

Are all salts strong electrolytes?

One mole of an ideal gas at 300 K is expanded isothermally from an initial volume of 1 litre to 10 litres. The value of △U for this process is:(R=2 cal mol−1 K−1)

The products "A" and "B" formed in above reactions are:

What type of defect can arise when a solid is heated? Which physical property is affected by it and in what way?

50 ml of a solution containing 10−3 mol of Ag+ is mixed with 50 ml of a 0.1 M HCl solution. How much Ag+ remains in solution? (Ksp of AgCl=1.0×10−10)

When one mole of univalent salt AB is dissolved in water at 300 K, 3.7 kJ of heat is absorbed and △G of the process is −8.3 kJ. What is the value of △S for the process?

18. What is hydride. Can water be called oxygen dihydride

Eqⁿ => 2Mg + O2 -----> 2MgOVerify that -- "Gram Equivalents[G.Eq] of Mg = G.Eq. of O2 = G.Eq of MgO"

What is enthalpy of uranium?

A 5.25% solution of a substance is isotonic with a 1.5% solution of urea (molecular mass = 60g/mole) in the same solvent . If the densities of both the solutions are assumed to be equal to 1g/cc, molar mass of substance will be

At 27∘C, three moles of an ideal diatomic gas occupy a volume V. If the gas expands adiabatically to a volume 3V, calculate the work done by the gas during the process. (R=8.31 J/mol-K,30.4=1.55)

The sample of Alf3 contains 3.0 * 10^24 f^- ions. The number of formula units of this sample are (In this question what is the meaning of formula unit?)

Molecular weight of KMnO4 in acidic medium and neutral medium will be respectively :

The number of valence electrons in the elements A and B are 3 and 6 respectively. The most probable compound formed from A and B is:

the order of E2 elimination for alkyl halides is what? among 1^° ,2^° and 3 .compare it with E1 too.

differencebetween thermal equilibrium and thermodynamic equilibriu

5. If 50.2 then Which one is correct exactly A. 1 B. 1.0

An Ideal Gas at 1 bar is heated from Oo C to 373K. If its initial volume is 5.46L, the final volume could be

8. An excited hydrogen atom when comes directly to the ground state emits a photoelectron with de broglie wavelength 4.09 Armstrong. If work function of metal is 3.75ev find out the no of orbit of hydrogen atom in which electron was present initially.

How did scientists come up with the value of 1 mole =6.022×1023?

39. For a radioactive wire if alpha radiation emitted from the end A and beta radiation emitted from the end B . what is direction of induced current in wire ?

Consider following reaction sequence.(D) has x number of double bond equivalents, the number of double bonds in (D) is y, the number of all stereoisomers of (D) is z. What is the value of x + y + z?

Is tin more reactive than zinc?

If -1