46295 + Interview Questions in Chemistry

1.	What are the properties of log functions
Answer» What are the properties of log functions

Discussion

2.	An organic compound of molar mass greater than 100 contains only C, H and N. The percentage of C is 6 times that of H while the sum of percentages of C and H is 1.5 times that of N. What is the least molar mass of the compound?
Answer» An organic compound of molar mass greater than $100$ contains only C, H and N. The percentage of C is 6 times that of H while the sum of percentages of C and H is 1.5 times that of N. What is the least molar mass of the compound?

Discussion

3.	What is the amount of heat to be supplied to prepare 128 g of CaC2 by using CaCO3 and followed by reaction with carbon. Reactions are:CaCO3(s)→CaO (s)+CO2 (g); △Ho=42 .8 kcalCaO (s)+3C (s)→CaC2 (s)+CO (g); △Ho=111 kcal
Answer» What is the amount of heat to be supplied to prepare $128 g$ of $C a C_{2}$ by using $C a C O_{3}$ and followed by reaction with carbon. Reactions are: $C a C O_{3} (s) \to C a O (s) + C O_{2} (g); △ H^{o} = 42 .8 kcal$ $C a O (s) + 3 C (s) \to C a C_{2} (s) + C O (g); △ H^{o} = 111 kcal$

Discussion

4.	Theionization constant of benzoic acid is 6.46 × 10–5and Kspfor silver benzoate is 2.5 × 10–13.How many times is silver benzoate more soluble in a buffer of pH 3.19compared to its solubility in pure water?
Answer» The ionization constant of benzoic acid is 6.46 × 10^–5 and K_sp for silver benzoate is 2.5 × 10^–13. How many times is silver benzoate more soluble in a buffer of pH 3.19 compared to its solubility in pure water?

Discussion

5.	24. What is the atomic mass of an element if 1 gm of an element is converted into 1.08 gm oxide? (specific heat capacity=0.06 cal per degree centigrade per gram)
Answer» 24. What is the atomic mass of an element if 1 gm of an element is converted into 1.08 gm oxide? (specific heat capacity=0.06 cal per degree centigrade per gram)

Discussion

6.	It is required to hold equal charges Q in equilibrium at the corners of a square. What charge when placed at the centre of the square will do this
Answer» It is required to hold equal charges Q in equilibrium at the corners of a square. What charge when placed at the centre of the square will do this

Discussion

7.	35. equivalent amount of aqueous solution of weak acid and weak base have a dissociation constant of 3 10-7each. the percentage hydrolysis of salt formed by them?
Answer» 35. equivalent amount of aqueous solution of weak acid and weak base have a dissociation constant of 3 10-7each. the percentage hydrolysis of salt formed by them?

Discussion

8.	The compressiblity factor (Z) for 1 mole of a real gas at low pressure can be written as:
Answer» The compressiblity factor (Z) for 1 mole of a real gas at low pressure can be written as:

Discussion

9.	One mole of P4 molecules contains
Answer» One mole of $P_{4}$ molecules contains

Discussion

10.	Assertion (A): - NO2 group is benzene ring deactivating and m - directing group Reason (R): - NO2 group with draws electron density from benzene ring and makes ortho and para positions more electron deficient than meta position
Answer» Assertion (A): - $N O_{2}$ group is benzene ring deactivating and m - directing group Reason (R): - $N O_{2}$ group with draws electron density from benzene ring and makes ortho and para positions more electron deficient than meta position

10.

Assertion (A): - NO2 group is benzene ring deactivating and m - directing group Reason (R): - NO2 group with draws electron density from benzene ring and makes ortho and para positions more electron deficient than meta position

Answer»

Assertion (A): - $N O_{2}$ group is benzene ring deactivating and m - directing group

Reason (R): - $N O_{2}$ group with draws electron density from benzene ring and makes ortho and para positions more electron deficient than meta position

Discussion

11.	What is time dilation and length contraction ?
Answer» What is time dilation and length contraction ?

Discussion

12.	Consider the following reaction and identify (B):
Answer» Consider the following reaction and identify (B):

Discussion

13.	For the given reactionMn+ + ne– → Mthe reduction potential is
Answer» For the given reaction Mn+ + ne– → M the reduction potential is

Discussion

14.	\sqrt[{}]{The pressure of H2 required to make the potential of H2 electrode zero in pure water} at 298k is
Answer» \sqrt[{}]{The pressure of H2 required to make the potential of H2 electrode zero in pure water} at 298k is

Discussion

15.	pH of a buffer containing 6.0 g of $CH_3 COOH$ and 8.2 g of $CH_3 COONa$ in 1 L of water is (pKa = 4.5)
Answer» pH of a buffer containing 6.0 g of $CH_3 COOH$ and 8.2 g of $CH_3 COONa$ in 1 L of water is ( $p K_{a}$ = 4.5)

Discussion

16.	0.408-0.4025 can be expressed as
Answer» 0.408-0.4025 can be expressed as

Discussion

17.	21.Which ion is most basic among halogen groups?
Answer» 21.Which ion is most basic among halogen groups?

Discussion

18.	How many sp2 and sp hybridised carbon atoms are present in C6H4(benzene ring like structure
Answer» How many sp2 and sp hybridised carbon atoms are present in C6H4(benzene ring like structure

Discussion

19.	Describe the preparation of potassium dichromate from chromite ore write chemical eq of RX involved what is effect of increasing pH of a soon of kmno4
Answer» Describe the preparation of potassium dichromate from chromite ore write chemical eq of RX involved what is effect of increasing pH of a soon of kmno4

Discussion

20.	<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}-->In which of the following pairs, both the ligands are ambidentate in nature:
Answer» <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> In which of the following pairs, both the ligands are ambidentate in nature:

Discussion

21.	The low reactivity of transition elements is due to their
Answer» The low reactivity of transition elements is due to their

Discussion

22.	For the reaction MCO3(s)—MO(s)+CO2 (g) ∆H=82.8kj at 25°C ∆E or ∆U at 25°C is
Answer» For the reaction MCO3(s)—MO(s)+CO2 (g) ∆H=82.8kj at 25°C ∆E or ∆U at 25°C is

Discussion

23.	13. How many isomers are possible for (CO (NH3)4CL2)CL draw
Answer» 13. How many isomers are possible for (CO (NH3)4CL2)CL draw

Discussion

24.	whenethaneisburntinexcessofoxygentheoxidationnumberofcarbonchanges
Answer» whenethaneisburntinexcessofoxygentheoxidationnumberofcarbonchanges

Discussion

25.	Ground state energy of an H-atom is -13.6eV. The energy needed to ionised H-atom from its second excited state is?
Answer» Ground state energy of an H-atom is -13.6eV. The energy needed to ionised H-atom from its second excited state is?

Discussion

26.	Consider the following complex ions, P,Q and R.P=[FeF6]3–,Q=[V(H2O)6]2+ and R=[Fe(H2O)6]2+The correct order of the complex ions, according to their spin-only magnetic moment values (in B.M.) is
Answer» Consider the following complex ions, $P, Q$ and $R . P = [F e F_{6}]^{3 -},$ $Q = [V (H_{2} O)_{6}]^{2 +}$ and $R = [F e (H_{2} O)_{6}]^{2 +}$ The correct order of the complex ions, according to their spin-only magnetic moment values (in B.M.) is

Discussion

27.	38. How to find bond order of molecules with more than 20 electrons?
Answer» 38. How to find bond order of molecules with more than 20 electrons?

Discussion

28.	What is spectrum What are it's types
Answer» What is spectrum What are it's types

28.

What is spectrum What are it's types

Answer»

What is spectrum

What are it's types

Discussion

29.	Consider the following reaction sequence s8(g) +8o2(g)_8so2(g) how many gram of so3, are produced in 1st mole
Answer» Consider the following reaction sequence s8(g) +8o2(g)_8so2(g) how many gram of so3, are produced in 1st mole

Discussion

30.	One mole of alkene X on ozonolysis gave one mole of acetaldehyde and one mole of acetone. The IUPAC name of X is
Answer» One mole of alkene X on ozonolysis gave one mole of acetaldehyde and one mole of acetone. The IUPAC name of X is

Discussion

31.	The reaction R - Br + NaCN → R-CN + NaBr, is an example of
Answer» The reaction R - Br + NaCN → R-CN + NaBr, is an example of

Discussion

32.	Why is RNC nucleophile not electrophile? but RCN is both nucleophile and electrophile
Answer» Why is RNC nucleophile not electrophile? but RCN is both nucleophile and electrophile

Discussion

33.	Among the following compounds, how many are amphoteric in nature?Be(OH)2, BeO, Ba(OH)2, Sr(OH)2
Answer» Among the following compounds, how many are amphoteric in nature? $B e (O H)_{2}, B e O, B a (O H)_{2}, S r (O H)_{2}$

Discussion

34.	Q.If 12.6g of NaHCO3 is added to 30.0g of CH3COOH solution,the residue is found to weigh 36.0g. What is the mass of CO2 released in the reaction ?
Answer» Q.If 12.6g of NaHCO3 is added to 30.0g of CH3COOH solution,the residue is found to weigh 36.0g. What is the mass of CO2 released in the reaction ?

Discussion

35.	Give reasons:(a) Molybdenum is used in the manufacture of ammonia.(b) Silver nitrate solution is kept in coloured bottles.
Answer» Give reasons: (a) Molybdenum is used in the manufacture of ammonia. (b) Silver nitrate solution is kept in coloured bottles.

35.

Give reasons:(a) Molybdenum is used in the manufacture of ammonia.(b) Silver nitrate solution is kept in coloured bottles.

Answer»

Give reasons:

(a) Molybdenum is used in the manufacture of ammonia.

(b) Silver nitrate solution is kept in coloured bottles.

Discussion

36.	26) Number of moles of MnO, required-to oxidize onemole of ferrous oxalate completely in acidic mediumwill be(1) 0.2 moles(2) 0.6 moles(3) 0.4 moles(4) 7.5 molesAIPMT (Prelims)-2008\rbrack
Answer» 26) Number of moles of MnO, required-to oxidize onemole of ferrous oxalate completely in acidic mediumwill be(1) 0.2 moles(2) 0.6 moles(3) 0.4 moles(4) 7.5 molesAIPMT (Prelims)-2008\rbrack

Discussion

37.	62.5 x 10^8 electrons per second are flowing through a wire of area of cross section 0.1 m², the value of current flowing will be
Answer» 62.5 x 10^8 electrons per second are flowing through a wire of area of cross section 0.1 m², the value of current flowing will be

Discussion

38.	Is all neutralisation reactions are exothermic? If no, then tell some neutralisation reactions which are not exothermic.
Answer» Is all neutralisation reactions are exothermic? If no, then tell some neutralisation reactions which are not exothermic.

Discussion

39.	What is hydrogenation? What is its industrial application?
Answer» What is hydrogenation? What is its industrial application?

Discussion

40.	If K1,K2 and K3 are equilibrium constant for formation of AD,AD2 and AD3 respectively as follow A+D⇌AD,AD+D⇌AD2,AD2+D⇌AD3 then equilibrium constant 'K" for A+3D⇌AD3 is related as
Answer» If $K_{1}, K_{2} a n d K_{3}$ are equilibrium constant for formation of $A D, A D_{2} a n d A D_{3}$ respectively as follow $A + D ⇌ A D, A D + D ⇌ A D_{2}, A D_{2} + D ⇌ A D_{3}$ then equilibrium constant 'K" for $A + 3 D ⇌ A D_{3}$ is related as

Discussion

41.	CH3CHO+NH2OH→CH3CH=NOH. The above reaction is carried out at
Answer» $C H_{3} C H O + N H_{2} O H \to C H_{3} C H = N O H .$ The above reaction is carried out at

Discussion

42.	What is specialisation ?
Answer» What is specialisation ?

Discussion

43.	Which of the following compounds corresponds Van't Hoff factor to be equal to 2 for dilute solution:
Answer» Which of the following compounds corresponds Van't Hoff factor to be equal to 2 for dilute solution:

Discussion

44.	In a practical situation if the unit of mass is doubled and unit of time becomes half then value of 8N(newton) in that condition is ??
Answer» In a practical situation if the unit of mass is doubled and unit of time becomes half then value of 8N(newton) in that condition is ??

Discussion

45.	What is deviation ?
Answer» What is deviation ?

Discussion

46.	Acidified solution of chromic acid on treatment with H2O2 gives blue colour which is due to -
Answer» Acidified solution of chromic acid on treatment with $H_{2} O_{2}$ gives blue colour which is due to -

Discussion

47.	Two identical cylinders contain helium at 2.5 atmosphere and argon at one atmosphere respectively. If both the gases are filled in one of the cylinders, the pressure would be
Answer» Two identical cylinders contain helium at 2.5 atmosphere and argon at one atmosphere respectively. If both the gases are filled in one of the cylinders, the pressure would be

Discussion

48.	ntWhat is the major product formed when but-2-enal is treated with lithium aluminium hydride in dry ether solvent?n ntCH3-CH=CH-CHO + LiAlH4/dry ether → ?n
Answer» ntWhat is the major product formed when but-2-enal is treated with lithium aluminium hydride in dry ether solvent?n ntCH3-CH=CH-CHO + LiAlH4/dry ether → ?n

Discussion

49.	The compound in which carbon uses only its sp3 hybrid orbitals for bond formation is?
Answer» The compound in which carbon uses only its $s p^{3}$ hybrid orbitals for bond formation is?

49.

The compound in which carbon uses only its sp3 hybrid orbitals for bond formation is?

Answer»

The compound in which carbon uses only its $s p^{3}$ hybrid orbitals for bond formation is?

Discussion

50.	26)A sample of a radioactive substance undergoes80% decomposition in 345 minutes. Its half life isminutesIn 2(1)x 345In 5In52)X345In 2n5In 4In4(4)x 345In5x 345
Answer» 26)A sample of a radioactive substance undergoes80% decomposition in 345 minutes. Its half life isminutesIn 2(1)x 345In 5In52)X345In 2n5In 4In4(4)x 345In5x 345

Discussion

15.	pH of a buffer containing 6.0 g of \(CH_3 COOH\) and 8.2 g of \(CH_3 COONa\) in 1 L of water is (pKa = 4.5)
Answer» pH of a buffer containing 6.0 g of \(CH_3 COOH\) and 8.2 g of \(CH_3 COONa\) in 1 L of water is ( $p K_{a}$ = 4.5)

Explore topic-wise InterviewSolutions in Current Affairs.

What are the properties of log functions

An organic compound of molar mass greater than 100 contains only C, H and N. The percentage of C is 6 times that of H while the sum of percentages of C and H is 1.5 times that of N. What is the least molar mass of the compound?

What is the amount of heat to be supplied to prepare 128 g of CaC2 by using CaCO3 and followed by reaction with carbon. Reactions are:CaCO3(s)→CaO (s)+CO2 (g); △Ho=42 .8 kcalCaO (s)+3C (s)→CaC2 (s)+CO (g); △Ho=111 kcal

Theionization constant of benzoic acid is 6.46 × 10–5and Kspfor silver benzoate is 2.5 × 10–13.How many times is silver benzoate more soluble in a buffer of pH 3.19compared to its solubility in pure water?

24. What is the atomic mass of an element if 1 gm of an element is converted into 1.08 gm oxide? (specific heat capacity=0.06 cal per degree centigrade per gram)

It is required to hold equal charges Q in equilibrium at the corners of a square. What charge when placed at the centre of the square will do this

35. equivalent amount of aqueous solution of weak acid and weak base have a dissociation constant of 3 10-7each. the percentage hydrolysis of salt formed by them?

The compressiblity factor (Z) for 1 mole of a real gas at low pressure can be written as:

One mole of P4 molecules contains

Assertion (A): - NO2 group is benzene ring deactivating and m - directing group Reason (R): - NO2 group with draws electron density from benzene ring and makes ortho and para positions more electron deficient than meta position

What is time dilation and length contraction ?

Consider the following reaction and identify (B):

For the given reactionMn+ + ne– → Mthe reduction potential is

\sqrt[{}]{The pressure of H2 required to make the potential of H2 electrode zero in pure water} at 298k is

pH of a buffer containing 6.0 g of \(CH_3 COOH\) and 8.2 g of \(CH_3 COONa\) in 1 L of water is (pKa = 4.5)

0.408-0.4025 can be expressed as

21.Which ion is most basic among halogen groups?

How many sp2 and sp hybridised carbon atoms are present in C6H4(benzene ring like structure

Describe the preparation of potassium dichromate from chromite ore write chemical eq of RX involved what is effect of increasing pH of a soon of kmno4

&lt;!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--&gt;In which of the following pairs, both the ligands are ambidentate in nature:

The low reactivity of transition elements is due to their

For the reaction MCO3(s)—MO(s)+CO2 (g) ∆H=82.8kj at 25°C ∆E or ∆U at 25°C is

13. How many isomers are possible for (CO (NH3)4CL2)CL draw

whenethaneisburntinexcessofoxygentheoxidationnumberofcarbonchanges

Ground state energy of an H-atom is -13.6eV. The energy needed to ionised H-atom from its second excited state is?

Consider the following complex ions, P,Q and R.P=[FeF6]3–,Q=[V(H2O)6]2+ and R=[Fe(H2O)6]2+The correct order of the complex ions, according to their spin-only magnetic moment values (in B.M.) is

38. How to find bond order of molecules with more than 20 electrons?

What is spectrum What are it's types

Consider the following reaction sequence s8(g) +8o2(g)_8so2(g) how many gram of so3, are produced in 1st mole

One mole of alkene X on ozonolysis gave one mole of acetaldehyde and one mole of acetone. The IUPAC name of X is

The reaction R - Br + NaCN → R-CN + NaBr, is an example of

Why is RNC nucleophile not electrophile? but RCN is both nucleophile and electrophile

Among the following compounds, how many are amphoteric in nature?Be(OH)2, BeO, Ba(OH)2, Sr(OH)2

Q.If 12.6g of NaHCO3 is added to 30.0g of CH3COOH solution,the residue is found to weigh 36.0g. What is the mass of CO2 released in the reaction ?

Give reasons:(a) Molybdenum is used in the manufacture of ammonia.(b) Silver nitrate solution is kept in coloured bottles.

26) Number of moles of MnO, required-to oxidize onemole of ferrous oxalate completely in acidic mediumwill be(1) 0.2 moles(2) 0.6 moles(3) 0.4 moles(4) 7.5 molesAIPMT (Prelims)-2008\rbrack

62.5 x 10^8 electrons per second are flowing through a wire of area of cross section 0.1 m², the value of current flowing will be

Is all neutralisation reactions are exothermic? If no, then tell some neutralisation reactions which are not exothermic.

What is hydrogenation? What is its industrial application?​

If K1,K2 and K3 are equilibrium constant for formation of AD,AD2 and AD3 respectively as follow A+D⇌AD,AD+D⇌AD2,AD2+D⇌AD3 then equilibrium constant 'K" for A+3D⇌AD3 is related as

CH3CHO+NH2OH→CH3CH=NOH. The above reaction is carried out at

What is specialisation ?

Which of the following compounds corresponds Van't Hoff factor to be equal to 2 for dilute solution:

In a practical situation if the unit of mass is doubled and unit of time becomes half then value of 8N(newton) in that condition is ??

What is deviation ?

Acidified solution of chromic acid on treatment with H2O2 gives blue colour which is due to -

Two identical cylinders contain helium at 2.5 atmosphere and argon at one atmosphere respectively. If both the gases are filled in one of the cylinders, the pressure would be

ntWhat is the major product formed when but-2-enal is treated with lithium aluminium hydride in dry ether solvent?n ntCH3-CH=CH-CHO + LiAlH4/dry ether → ?n

The compound in which carbon uses only its sp3 hybrid orbitals for bond formation is?

26)A sample of a radioactive substance undergoes80% decomposition in 345 minutes. Its half life isminutesIn 2(1)x 345In 5In52)X345In 2n5In 4In4(4)x 345In5x 345

In which of the following pairs, both the ligands are ambidentate in nature:

What is hydrogenation? What is its industrial application?