46295 + Interview Questions in Chemistry

1.	Find the drevatives of xsinx
Answer» Find the drevatives of xsinx

Discussion

2.	54. 2A+B====Product (elementary reaction) If its pressure increases 3 times its initial pressure then its velocity will become how many of its previous velocity A)9 times B)27 times C)1/9 times D)1/27 times
Answer» 54. 2A+B====Product (elementary reaction) If its pressure increases 3 times its initial pressure then its velocity will become how many of its previous velocity A)9 times B)27 times C)1/9 times D)1/27 times

Discussion

3.	A weak acid, HA has a Ka of 1.00×10−5. If 0.100 mol of this acid is dissolved in one litre of water, the percentage of acid dissociated at equilibrium is closest to
Answer» A weak acid, HA has a $K_{a}$ of $1.00 \times 10^{- 5} .$ If 0.100 mol of this acid is dissolved in one litre of water, the percentage of acid dissociated at equilibrium is closest to

Discussion

4.	BLindral/H2←−−−−−−−R−C≡C−RNa/NH3−−−−−→ A and B are geometrical isomers (R - CH = CH - R):
Answer» $B L i n d r a l / H_{2} \leftarrow ------ - R - C \equiv C - R N a / N H_{3} - ---- \to$ A and B are geometrical isomers (R - CH = CH - R):

4.

BLindral/H2←−−−−−−−R−C≡C−RNa/NH3−−−−−→ A and B are geometrical isomers (R - CH = CH - R):

Answer»

$B L i n d r a l / H_{2} \leftarrow ------ - R - C \equiv C - R N a / N H_{3} - ---- \to$ A and B are geometrical isomers (R - CH = CH - R):

Discussion

5.	Assetion (A) When methyl alcohol is added to water, boiling point of water increases. Reason (R) When a volatile solute is added to a volatile solvent elevation in boiling point is observed.
Answer» Assetion (A) When methyl alcohol is added to water, boiling point of water increases. Reason (R) When a volatile solute is added to a volatile solvent elevation in boiling point is observed.

Discussion

6.	The compound which is most reactive towards electrophilic substitution is:
Answer» The compound which is most reactive towards electrophilic substitution is:

Discussion

7.	what is the difference between oxidation number, covalency and coordinationnumber ?
Answer» what is the difference between oxidation number, covalency and coordination number ?

Discussion

8.	Copper has face centered cubic (fcc) lattice with interatomic spacing equal to 2.54A the value of lattice constant for this lattice is
Answer» Copper has face centered cubic (fcc) lattice with interatomic spacing equal to 2.54A the value of lattice constant for this lattice is

Discussion

9.	An ideal gas expands isothermally from a volume V1 to V2 to and then compressed to original volume V1 adiabatically. Initial pressure is P1 and final pressure is P3. The total work done is W. Then
Answer» An ideal gas expands isothermally from a volume $V_{1}$ to $V_{2}$ to and then compressed to original volume $V_{1}$ adiabatically. Initial pressure is $P_{1}$ and final pressure is $P_{3}$ . The total work done is W. Then

Discussion

10.	Show that P(n):3^n is less than 15 is true for n less than or equal to 2
Answer» Show that P(n):3^n is less than 15 is true for n less than or equal to 2

Discussion

11.	The alkaline earth metal nitrate that does not crystallise with water molecules is:
Answer» The alkaline earth metal nitrate that does not crystallise with water molecules is:

Discussion

12.	25. CH3NH2 + CS2(A)+ HgCl2 (B) + H30+ (C) Find A,B,C
Answer» 25. CH3NH2 + CS2(A)+ HgCl2 (B) + H30+ (C) Find A,B,C

Discussion

13.	For hydrogen gas, Cp−Cv = a and for nitrogen gas Cp−Cv = b, then the relation between a and b is: (where Cp and Cv are specific heats defined per gram)
Answer» For hydrogen gas, $C_{p} - C_{v}$ = a and for nitrogen gas $C_{p} - C_{v}$ = b, then the relation between a and b is: (where $C_{p}$ and $C_{v}$ are specific heats defined per gram)

Discussion

14.	(i) Find the domain of the function f(x)=x2+2x+1x2−8x+12. (ii) Let A={8,11,15,12,15,18,23} and f be function from A→N, such that f(x) is the highest prime factor of x. Find f and its range.
Answer» (i) Find the domain of the function $f (x) = \frac{x^{2} + 2 x + 1}{x^{2} - 8 x + 12} .$ (ii) Let $A = {8, 11, 15, 12, 15, 18, 23}$ and f be function from $A \to N,$ such that f(x) is the highest prime factor of x. Find f and its range.

14.

(i) Find the domain of the function f(x)=x2+2x+1x2−8x+12. (ii) Let A={8,11,15,12,15,18,23} and f be function from A→N, such that f(x) is the highest prime factor of x. Find f and its range.

Answer»

(i) Find the domain of the function $f (x) = \frac{x^{2} + 2 x + 1}{x^{2} - 8 x + 12} .$

(ii) Let $A = {8, 11, 15, 12, 15, 18, 23}$ and f be function from $A \to N,$ such that f(x) is the highest prime factor of x. Find f and its range.

Discussion

15.	Why in tetracaarbonylnickel(0) coordination sphere is not present?
Answer» Why in tetracaarbonylnickel(0) coordination sphere is not present?

Discussion

16.	28. Explain the coordination number in K3[Fe(CN)5 NO] and also explain the hybridisation of it??
Answer» 28. Explain the coordination number in K3[Fe(CN)5 NO] and also explain the hybridisation of it??

Discussion

17.	57. Why surface tension of lypophillic colloid is lower than dispersion medium,viscosity higher than dispersion medium.But viscosity, surface tension is same as that of dispersion medium for lypophobic colloids.
Answer» 57. Why surface tension of lypophillic colloid is lower than dispersion medium,viscosity higher than dispersion medium.But viscosity, surface tension is same as that of dispersion medium for lypophobic colloids.

Discussion

18.	Which one of the following reactions does not occur?
Answer» Which one of the following reactions does not occur?

Discussion

19.	Is there any formula to find totalnumber of isomers of an organic compound?
Answer» Is there any formula to find totalnumber of isomers of an organic compound?

Discussion

20.	If E_1 and E_2 mechanisms have the same reactivity order, that is, 3^.>2^.>1^. , then how to decide whether the reaction will occur by E_1 mechanism or E_2 mechanism?
Answer» If E_1 and E_2 mechanisms have the same reactivity order, that is, 3^.>2^.>1^. , then how to decide whether the reaction will occur by E_1 mechanism or E_2 mechanism?

Discussion

21.	An electron is accelerated through a potential difference of 10000 V. The de Broglie wavelength associated with electron will be
Answer» An electron is accelerated through a potential difference of $10000 V$ . The de Broglie wavelength associated with electron will be

Discussion

22.	Laplace transform ofx(t)=∑∞k=0δ(t−KT) is
Answer» Laplace transform of $x (t) = \sum_{k = 0}^{\infty} δ (t - K T)$ is

Discussion

23.	Two weak monobasic organic acids HA and HB have dissociation constants as 3.0×10−5 and 1.5×10−5, respectively, at 25∘. If 500 mL of 1M solutions of each of these two acids are mixed to produce 1 L of mixed acid solution, what is the pH of the resulting solution?
Answer» Two weak monobasic organic acids HA and HB have dissociation constants as $3.0 \times 10^{- 5}$ and $1.5 \times 10^{- 5}$ , respectively, at $25^{\circ}$ . If 500 mL of 1M solutions of each of these two acids are mixed to produce 1 L of mixed acid solution, what is the pH of the resulting solution?

Discussion

24.	Three moles of hypochlorite gives 2 moles of chloride and one mole of chlorate. This is:
Answer» Three moles of hypochlorite gives 2 moles of chloride and one mole of chlorate. This is:

Discussion

25.	The equilibrium composition for the reaction is - PCl3+Cl2⇌PCl5 0.20 0.10 0.40 mole/litre If 0.20 mole of Cl2 is added at same temp. Find equilibrium concentration of PCl5 (KC= 20)
Answer» The equilibrium composition for the reaction is - $P C l_{3} + C l_{2} ⇌ P C l_{5}$ 0.20 0.10 0.40 mole/litre If 0.20 mole of $C l_{2}$ is added at same temp. Find equilibrium concentration of $P C l_{5}$ (KC= 20)

25.

The equilibrium composition for the reaction is - PCl3+Cl2⇌PCl5 0.20 0.10 0.40 mole/litre If 0.20 mole of Cl2 is added at same temp. Find equilibrium concentration of PCl5 (KC= 20)

Answer»

The equilibrium composition for the reaction is -

$P C l_{3} + C l_{2} ⇌ P C l_{5}$

0.20 0.10 0.40 mole/litre

If 0.20 mole of $C l_{2}$ is added at same temp. Find equilibrium concentration of $P C l_{5}$ (KC= 20)

Discussion

26.	Which of the following statements is not characteristic of free radical chain reactions?
Answer» Which of the following statements is not characteristic of free radical chain reactions?

26.

Which of the following statements is not characteristic of free radical chain reactions?

Answer»

Which of the following statements is not characteristic of free radical chain reactions?

Discussion

27.	The equilibrium constant for the reaction is H2+Br2→2HBr at 1024 k is 1.60×105. Find the equilibrium pressure of all gases if 10 bar of HBr is introduced into a sealed container at 1024 K.
Answer» The equilibrium constant for the reaction is $H_{2} + B r_{2} \to 2 H B r$ at 1024 k is $1.60 \times 10^{5} .$ Find the equilibrium pressure of all gases if $10 b a r$ of HBr is introduced into a sealed container at $1024 K$ .

Discussion

28.	Obtainapproximately the ratio of the nuclear radii of the gold isotope and the silver isotope.
Answer» Obtain approximately the ratio of the nuclear radii of the gold isotope and the silver isotope.

Discussion

29.	Write the balanced equation for : - reaction when carbon dioxide is passed into a ammonical brine.
Answer» Write the balanced equation for : - reaction when carbon dioxide is passed into a ammonical brine.

Discussion

30.	71. What is crystalline structure.
Answer» 71. What is crystalline structure.

Discussion

31.	Gold crystallises in ccp structure.The total number of voids present in 197g of gold will be
Answer» Gold crystallises in ccp structure.The total number of voids present in 197g of gold will be

Discussion

32.	the correct order of homolytic bond fission(dissociation)energy for ch4,c2h6,ch3br
Answer» the correct order of homolytic bond fission(dissociation)energy for ch4,c2h6,ch3br

Discussion

33.	Givethe formula and describe the structure of anoble gas species which is isostructural with:(i) (ii) (iii)
Answer» Give the formula and describe the structure of a noble gas species which is isostructural with: (i) (ii) (iii)

33.

Givethe formula and describe the structure of anoble gas species which is isostructural with:(i) (ii) (iii)

Answer»

Give
the formula and describe the structure of a
noble gas species which is isostructural with:

(i)

(ii)

(iii)

Discussion

34.	For the given reaction(a) CH2=CH−OH\|CH−CH3[X]−−→CH2=CH−O\|\|C−CH3[X] will be:(a) Cl2/NaOH (b) Fenton reagent(c) Aluminium tertbutoxide (b) K2Cr2O7/H/△
Answer» For the given reaction $(a) C H_{2} = C H - O H \| C H - C H_{3} [X] - - \to C H_{2} = C H - O \| \| C - C H_{3}$ [X] will be: $(a) C l_{2} / N a O H (b) F e n t o n r e a g e n t$ (c) Aluminium tertbutoxide $(b) K_{2} C r_{2} O_{7} / H / △$

Discussion

35.	Why doesn't benzylamine react with Br2/H2O?
Answer» Why doesn't benzylamine react with Br2/H2O?

Discussion

36.	capillary tube of radius r is immersed in a liquid and mass of liquid, which rises in up in it is M. If the radius of the tube is doubled, then the mass of liquid which will rise in capillary tube will be A. M/2 B. M C. 2M D. M/4
Answer» capillary tube of radius r is immersed in a liquid and mass of liquid, which rises in up in it is M. If the radius of the tube is doubled, then the mass of liquid which will rise in capillary tube will be A. M/2 B. M C. 2M D. M/4

Discussion

37.	How many maximum lines are possible(spectral) if electron is present in 4th shell and only two atom are present in the sample?
Answer» How many maximum lines are possible(spectral) if electron is present in 4th shell and only two atom are present in the sample?

Discussion

38.	Make a labeled diagram of a candle flame.
Answer» Make a labeled diagram of a candle flame.

Discussion

39.	The osmotic pressure of 0.1 M aqueous solution of MgCl2 at 300 K is 4.926 atm. What will be the percentage ionization of the salt?
Answer» The osmotic pressure of $0.1 M$ aqueous solution of $M g C l_{2}$ at $300 K$ is $4.926 a t m$ . What will be the percentage ionization of the salt?

Discussion

40.	Which of the following statement(s) is/are correct when a mixture of NaCl and K2Cr2O7 are gently warmed with conc. H2SO4 ?
Answer» Which of the following statement(s) is/are correct when a mixture of $N a C l$ and $K_{2} C r_{2} O_{7}$ are gently warmed with conc. $H_{2} S O_{4}$ ?

Discussion

41.	Question 10Will the solution of sugar in distilled water conduct electricity?
Answer» Question 10 Will the solution of sugar in distilled water conduct electricity?

Discussion

42.	How does molecular orbital theory explain shape of chemical compounds?
Answer» How does molecular orbital theory explain shape of chemical compounds?

Discussion

43.	The resistance and conductivity of 0.02 M KCl solution are 82.4 ohm and 0.002768Scm−1, respectively. When filled with 0.005NK2SO4, the solution had a resistance of 324 ohm. Cell constant is
Answer» The resistance and conductivity of 0.02 M KCl solution are 82.4 ohm and $0.002768 S c m^{- 1}$ , respectively. When filled with $0.005 N K_{2} S O_{4}$ , the solution had a resistance of 324 ohm. Cell constant is

Discussion

44.	(A) α−Amino acid(C3H7NO3)MeOH−−−−→HCl(B)(C4H10NO3Cl)PCl5−−−→(C)(C4H9NO2Cl2)(C)(C4H9NO2Cl2)H3O+−−−→(D)(C3H6NO2Cl)Na−Hg−−−−−→HClAlanineCompound (C) is :
Answer» $(A) α - Amino acid (C_{3} H_{7} N O_{3}) M e O H - --- \to H C l (B) (C_{4} H_{10} N O_{3} C l) P C l_{5} - -- \to (C) (C_{4} H_{9} N O_{2} C l_{2})$ $(C) (C_{4} H_{9} N O_{2} C l_{2}) H_{3} O^{+} - -- \to (D) (C_{3} H_{6} N O_{2} C l) N a - H g - ---- \to H C l Alanine$ Compound (C) is :

Discussion

45.	Is 1amu is equal to the mass of an atom of Hydrogen?
Answer» Is 1amu is equal to the mass of an atom of Hydrogen?

Discussion

46.	In an electrochemical cell represented as,Zn \| Zn2+(c1) \|\| Cu2+(c2) \| CuSo in this cell,a.Zn is oxidizedb.Zn is reducedc.Cu is oxidizedd.Cu is reduced
Answer» In an electrochemical cell represented as, Zn \| Zn²⁺₍c₁₎ \|\| Cu²⁺₍c₂₎\| Cu So in this cell, a.Zn is oxidized b.Zn is reduced c.Cu is oxidized d.Cu is reduced

46.

In an electrochemical cell represented as,Zn | Zn2+(c1) || Cu2+(c2) | CuSo in this cell,a.Zn is oxidizedb.Zn is reducedc.Cu is oxidizedd.Cu is reduced

Answer»

In an electrochemical cell represented as,

Zn | Zn²⁺₍c₁₎ || Cu²⁺₍c₂₎| Cu

So in this cell,

a.Zn is oxidized

b.Zn is reduced

c.Cu is oxidized

d.Cu is reduced

Discussion

47.	When 3.06 g of solid NH4HS is introduced into a two-litre evacuated flask at 27 oC, 30% of the solid decomposes into gaseous ammonia and hydrogen sulphide. Choose the most appropriate one regarding Kc, Kp and degree of dissociation α:
Answer» When 3.06 g of solid $N H_{4}$ HS is introduced into a two-litre evacuated flask at 27 $^{o} C$ , 30 $%$ of the solid decomposes into gaseous ammonia and hydrogen sulphide. Choose the most appropriate one regarding $K_{c}$ , $K_{p}$ and degree of dissociation $α$ :

Discussion

48.	If 92U238 changes to 85At210by a series of α and β decays. The number of α and β decays undergone is
Answer» If ₉₂U²³⁸ changes to ₈₅At²¹⁰ by a series of α and β decays. The number of α and β decays undergone is

Discussion

49.	The formation of cyanohydrin from ketone is an example of:
Answer» The formation of cyanohydrin from ketone is an example of:

Discussion

50.	Gold is found in the free state because:
Answer» Gold is found in the free state because:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Find the drevatives of xsinx

54. 2A+B====Product (elementary reaction) If its pressure increases 3 times its initial pressure then its velocity will become how many of its previous velocity A)9 times B)27 times C)1/9 times D)1/27 times

A weak acid, HA has a Ka of 1.00×10−5. If 0.100 mol of this acid is dissolved in one litre of water, the percentage of acid dissociated at equilibrium is closest to

BLindral/H2←−−−−−−−R−C≡C−RNa/NH3−−−−−→ A and B are geometrical isomers (R - CH = CH - R):

Assetion (A) When methyl alcohol is added to water, boiling point of water increases. Reason (R) When a volatile solute is added to a volatile solvent elevation in boiling point is observed.

The compound which is most reactive towards electrophilic substitution is:

what is the difference between oxidation number, covalency and coordinationnumber ?

Copper has face centered cubic (fcc) lattice with interatomic spacing equal to 2.54A the value of lattice constant for this lattice is

An ideal gas expands isothermally from a volume V1 to V2 to and then compressed to original volume V1 adiabatically. Initial pressure is P1 and final pressure is P3. The total work done is W. Then

Show that P(n):3^n is less than 15 is true for n less than or equal to 2

The alkaline earth metal nitrate that does not crystallise with water molecules is:

25. CH3NH2 + CS2(A)+ HgCl2 (B) + H30+ (C) Find A,B,C

For hydrogen gas, Cp−Cv = a and for nitrogen gas Cp−Cv = b, then the relation between a and b is: (where Cp and Cv are specific heats defined per gram)

(i) Find the domain of the function f(x)=x2+2x+1x2−8x+12. (ii) Let A={8,11,15,12,15,18,23} and f be function from A→N, such that f(x) is the highest prime factor of x. Find f and its range.

Why in tetracaarbonylnickel(0) coordination sphere is not present?

28. Explain the coordination number in K3[Fe(CN)5 NO] and also explain the hybridisation of it??

57. Why surface tension of lypophillic colloid is lower than dispersion medium,viscosity higher than dispersion medium.But viscosity, surface tension is same as that of dispersion medium for lypophobic colloids.

Which one of the following reactions does not occur?

Is there any formula to find totalnumber of isomers of an organic compound?

If E_1 and E_2 mechanisms have the same reactivity order, that is, 3^.>2^.>1^. , then how to decide whether the reaction will occur by E_1 mechanism or E_2 mechanism?

An electron is accelerated through a potential difference of 10000 V. The de Broglie wavelength associated with electron will be

Laplace transform ofx(t)=∑∞k=0δ(t−KT) is

Two weak monobasic organic acids HA and HB have dissociation constants as 3.0×10−5 and 1.5×10−5, respectively, at 25∘. If 500 mL of 1M solutions of each of these two acids are mixed to produce 1 L of mixed acid solution, what is the pH of the resulting solution?

Three moles of hypochlorite gives 2 moles of chloride and one mole of chlorate. This is:

The equilibrium composition for the reaction is - PCl3+Cl2⇌PCl5 0.20 0.10 0.40 mole/litre If 0.20 mole of Cl2 is added at same temp. Find equilibrium concentration of PCl5 (KC= 20)

Which of the following statements is not characteristic of free radical chain reactions?

The equilibrium constant for the reaction is H2+Br2→2HBr at 1024 k is 1.60×105. Find the equilibrium pressure of all gases if 10 bar of HBr is introduced into a sealed container at 1024 K.

Obtainapproximately the ratio of the nuclear radii of the gold isotope and the silver isotope.

Write the balanced equation for : - reaction when carbon dioxide is passed into a ammonical brine.

71. What is crystalline structure.

Gold crystallises in ccp structure.The total number of voids present in 197g of gold will be

the correct order of homolytic bond fission(dissociation)energy for ch4,c2h6,ch3br

Givethe formula and describe the structure of anoble gas species which is isostructural with:(i) (ii) (iii)

For the given reaction(a) CH2=CH−OH|CH−CH3[X]−−→CH2=CH−O||C−CH3[X] will be:(a) Cl2/NaOH (b) Fenton reagent(c) Aluminium tertbutoxide (b) K2Cr2O7/H/△

Why doesn't benzylamine react with Br2/H2O?

capillary tube of radius r is immersed in a liquid and mass of liquid, which rises in up in it is M. If the radius of the tube is doubled, then the mass of liquid which will rise in capillary tube will be A. M/2 B. M C. 2M D. M/4

How many maximum lines are possible(spectral) if electron is present in 4th shell and only two atom are present in the sample?

Make a labeled diagram of a candle flame. ​

The osmotic pressure of 0.1 M aqueous solution of MgCl2 at 300 K is 4.926 atm. What will be the percentage ionization of the salt?

Which of the following statement(s) is/are correct when a mixture of NaCl and K2Cr2O7 are gently warmed with conc. H2SO4 ?

Question 10Will the solution of sugar in distilled water conduct electricity?

How does molecular orbital theory explain shape of chemical compounds?

The resistance and conductivity of 0.02 M KCl solution are 82.4 ohm and 0.002768Scm−1, respectively. When filled with 0.005NK2SO4, the solution had a resistance of 324 ohm. Cell constant is

(A) α−Amino acid(C3H7NO3)MeOH−−−−→HCl(B)(C4H10NO3Cl)PCl5−−−→(C)(C4H9NO2Cl2)(C)(C4H9NO2Cl2)H3O+−−−→(D)(C3H6NO2Cl)Na−Hg−−−−−→HClAlanineCompound (C) is :

Is 1amu is equal to the mass of an atom of Hydrogen?

In an electrochemical cell represented as,Zn | Zn2+(c1) || Cu2+(c2) | CuSo in this cell,a.Zn is oxidizedb.Zn is reducedc.Cu is oxidizedd.Cu is reduced

When 3.06 g of solid NH4HS is introduced into a two-litre evacuated flask at 27 oC, 30% of the solid decomposes into gaseous ammonia and hydrogen sulphide. Choose the most appropriate one regarding Kc, Kp and degree of dissociation α:

If 92U238 changes to 85At210by a series of α and β decays. The number of α and β decays undergone is

The formation of cyanohydrin from ketone is an example of:

Gold is found in the free state because:

Make a labeled diagram of a candle flame.