46295 + Interview Questions in Chemistry

1.	What is the ratio of frequency of 3rd orbit of H atom to that of 2nd orbit of He+?
Answer» What is the ratio of frequency of 3rd orbit of H atom to that of 2nd orbit of He+?

Discussion

2.	3BaCl2 + 2Na3P04-->Ba3(PO4) 2 + 6NaCl.Maximum amount of Ba3(PO4)2 formed when2 moles each of Na3PO4 and BaCl2 are allowed to react is3'4(1) 4 mol (2) 1 mol (3)2/3 mol(4) 1/3mol
Answer» 3BaCl2 + 2Na3P04-->Ba3(PO4) 2 + 6NaCl.Maximum amount of Ba3(PO4)2 formed when2 moles each of Na3PO4 and BaCl2 are allowed to react is3'4(1) 4 mol (2) 1 mol (3)2/3 mol(4) 1/3mol

Discussion

3.	82. in a unit cell a B C and D are present at corners Face centres body centres and edge centre if atoms touching one of the plane passing through two diagonal opposite edges are removed then formula of compound is
Answer» 82. in a unit cell a B C and D are present at corners Face centres body centres and edge centre if atoms touching one of the plane passing through two diagonal opposite edges are removed then formula of compound is

Discussion

4.	2 N HCl solution will have the same molar concentration as:
Answer» $2 N H C l$ solution will have the same molar concentration as:

Discussion

5.	a) Calculate the mass of ammonia produced if 2.00 ×103 g of nitrogen reacts with 1.00 ×103 g. b) Will any of the two reagents will remain unreacted. If yes, which one and what would be its mass.
Answer» a) Calculate the mass of ammonia produced if 2.00 ×10³g of nitrogen reacts with 1.00 ×10³g. b) Will any of the two reagents will remain unreacted. If yes, which one and what would be its mass.

5.

a) Calculate the mass of ammonia produced if 2.00 ×103 g of nitrogen reacts with 1.00 ×103 g. b) Will any of the two reagents will remain unreacted. If yes, which one and what would be its mass.

Answer»

a) Calculate the mass of ammonia produced if 2.00 ×10³g of nitrogen reacts with 1.00 ×10³g.

b) Will any of the two reagents will remain unreacted. If yes, which one and what would be its mass.

Discussion

6.	30. Calcium carbonate reacts with HCl to give CaCl,and CO2 according to the reaction:+ 2HCI(aq) CaCl, (aq) + CO2(g)CaCO3(s)H20(I) What mass of 20% impure CaCO3 isrequired to react completely with 250 mL of 0.50+M HCI?(1) 6.25 g(2) 5 g(3) 4.75 g(4) 7.8 g
Answer» 30. Calcium carbonate reacts with HCl to give CaCl,and CO2 according to the reaction:+ 2HCI(aq) CaCl, (aq) + CO2(g)CaCO3(s)H20(I) What mass of 20% impure CaCO3 isrequired to react completely with 250 mL of 0.50+M HCI?(1) 6.25 g(2) 5 g(3) 4.75 g(4) 7.8 g

Discussion

7.	72. A photon of wavelength 4×10 to the power -7m strikes on metal surface, the work function of the metal being 2.13 event. Calculate (i) energy of photon(ev),(ii) kinetic energy of emission,and (iii) velocity of photo electron (1ev=1.6020×10to the power -19 joule.
Answer» 72. A photon of wavelength 4×10 to the power -7m strikes on metal surface, the work function of the metal being 2.13 event. Calculate (i) energy of photon(ev),(ii) kinetic energy of emission,and (iii) velocity of photo electron (1ev=1.6020×10to the power -19 joule.

Discussion

8.	15. The electrolysis of molten KCl.MgCl2.6H2O gives- a) Mg only b) K only c) K& Mg only d) Mg & Cl2
Answer» 15. The electrolysis of molten KCl.MgCl2.6H2O gives- a) Mg only b) K only c) K& Mg only d) Mg & Cl2

Discussion

9.	if at certain temperature 40% of c2h6(g) dissociates into c2h4(g) and h2(g) and the equilibrium pressure becomes 5 atm then kp for the dissociation is?
Answer» if at certain temperature 40% of c2h6(g) dissociates into c2h4(g) and h2(g) and the equilibrium pressure becomes 5 atm then kp for the dissociation is?

Discussion

10.	What bolume of co2 at stp envolve when 1 kg of caco3 reacts with excess of dil.hcl
Answer» What bolume of co2 at stp envolve when 1 kg of caco3 reacts with excess of dil.hcl

Discussion

11.	22. the AsF5 molecule is a trigonal pyramidal . the hydrid orbitals used by the As atoms for bonding are 1) dx - y ,dz , s , px ,py 2) dxy, s ,px, py,pz 3) s ,px ,py ,pz, dz 4) dx - y, s ,px , py , pz
Answer» 22. the AsF5 molecule is a trigonal pyramidal . the hydrid orbitals used by the As atoms for bonding are 1) dx - y ,dz , s , px ,py 2) dxy, s ,px, py,pz 3) s ,px ,py ,pz, dz 4) dx - y, s ,px , py , pz

Discussion

12.	Trans-form of polyisoprene is
Answer» Trans-form of polyisoprene is

Discussion

13.	33. Give all different numerical value of gas constant R
Answer» 33. Give all different numerical value of gas constant R

Discussion

14.	Contribution of an atom located at the edge centre in a cubic unit cell isएक घनीय एकक कोष्ठिका में कोर केन्द्र पर स्थित परमाणु का योगदान है
Answer» Contribution of an atom located at the edge centre in a cubic unit cell is एक घनीय एकक कोष्ठिका में कोर केन्द्र पर स्थित परमाणु का योगदान है

Discussion

15.	The size of the species I,I− & I+ follows the order:
Answer» The size of the species $I, I^{-}$ & $I^{+}$ follows the order:

Discussion

16.	what is lederberg;s replica plate experiment?
Answer» what is lederberg;s replica plate experiment?

Discussion

17.	The length of a metal wire is when the tension in it is T1 and when the tension in it is T2. The natural length of the wire:
Answer» The length of a metal wire is when the tension in it is $T_{1}$ and when the tension in it is $T_{2}$ . The natural length of the wire:

Discussion

18.	Q6 Calculate the freezing point of an aqueous solution containing 10.50 g of MaBrz in 200 gof water (molar mass of MgBr2-184 g mol-1 ). Given Kf for water = 1.86 KKg mor
Answer» Q6 Calculate the freezing point of an aqueous solution containing 10.50 g of MaBrz in 200 gof water (molar mass of MgBr2-184 g mol-1 ). Given Kf for water = 1.86 KKg mor

Discussion

19.	20. What is scum? Whu scum is formed when hard water is treated with soap?
Answer» 20. What is scum? Whu scum is formed when hard water is treated with soap?

Discussion

20.	The Conversion of an amide by action of NaOH and Br2 to primary amine that has one carbon less than the starting amide is known as Hofmann-Bromamide reaction. R−O\|\|C−NH2Br2+NaOH−−−−−−−→(or)NaoBr R−NH2+NaBr+Na2CO3
Answer» The Conversion of an amide by action of NaOH and $B r_{2}$ to primary amine that has one carbon less than the starting amide is known as Hofmann-Bromamide reaction. $R - O \| \| C - N H_{2} B r_{2} + N a O H - ------ \to (o r) N a o B r R - N H_{2} + N a B r + N a_{2} C O_{3}$

20.

The Conversion of an amide by action of NaOH and Br2 to primary amine that has one carbon less than the starting amide is known as Hofmann-Bromamide reaction. R−O||C−NH2Br2+NaOH−−−−−−−→(or)NaoBr R−NH2+NaBr+Na2CO3

Answer»

The Conversion of an amide by action of NaOH and $B r_{2}$ to primary amine that has one carbon less than the starting amide is known as Hofmann-Bromamide reaction.

$R - O | | C - N H_{2} B r_{2} + N a O H - ------ \to (o r) N a o B r R - N H_{2} + N a B r + N a_{2} C O_{3}$

Discussion

21.	An impure sample of a g 1.5 gram is heated with if to form 0.124 gram of Ag2S what was the percentage yield of ag2s
Answer» An impure sample of a g 1.5 gram is heated with if to form 0.124 gram of Ag2S what was the percentage yield of ag2s

Discussion

22.	What is Kc for the following equilibriumwhen the equilibrium concentration of each substance is: [SO2]=0.60 M, [O2] = 0.82 M and [SO3] = 1.90 M ?
Answer» What is K_c for the following equilibrium when the equilibrium concentration of each substance is: [SO₂]= 0.60 M, [O₂] = 0.82 M and [SO₃] = 1.90 M ?

22.

What is Kc for the following equilibriumwhen the equilibrium concentration of each substance is: [SO2]=0.60 M, [O2] = 0.82 M and [SO3] = 1.90 M ?

Answer»

What is K_c for the following equilibrium
when the equilibrium concentration of each substance is: [SO₂]=
0.60 M, [O₂] = 0.82 M and [SO₃] = 1.90 M ?

Discussion

23.	A vessel of volume 5L contains 1.4g of nitrogen at a temperature 1800K .The pressure of the gas if 30% of its molecules are dissociated into atoms at this temperature is
Answer» A vessel of volume 5L contains 1.4g of nitrogen at a temperature 1800K .The pressure of the gas if 30% of its molecules are dissociated into atoms at this temperature is

Discussion

24.	Benzoic acid is volatile compound or non volatile compound?
Answer» Benzoic acid is volatile compound or non volatile compound?

Discussion

25.	Calculate the hybridization of C2H2 using formula
Answer» Calculate the hybridization of C2H2 using formula

Discussion

26.	The radii of F,F−,O and O−2 are in the order of
Answer» The radii of $F, F^{-}, O$ and $O^{- 2}$ are in the order of

Discussion

27.	The mole fraction of component A in vapour phase is x1 and mole fraction of component A in liquid mixture is x2(P0A= vapour pressure of pure A; P0B = vapour pressure of pure B). What is the total pressure?
Answer» The mole fraction of component A in vapour phase is $x_{1}$ and mole fraction of component A in liquid mixture is $x_{2} (P_{A}^{0}$ = vapour pressure of pure A; $P_{B}^{0}$ = vapour pressure of pure B). What is the total pressure?

Discussion

28.	what is the reactivity order of haloarenes in nitration?
Answer» what is the reactivity order of haloarenes in nitration?

Discussion

29.	What will be the change of mass when 10g Mg is heated strongly in oxygen?
Answer» What will be the change of mass when 10g Mg is heated strongly in oxygen?

Discussion

30.	Why lattice enthalpy should be high for ionic bond to be stable
Answer» Why lattice enthalpy should be high for ionic bond to be stable

Discussion

31.	21. If we have CH3I and CH3Br which will have higher boiling point?
Answer» 21. If we have CH3I and CH3Br which will have higher boiling point?

Discussion

32.	To neutralize completely 20 mL of 0.1molar aqueous of H3PO4,what volume of 0.1M KOH solution will be required?
Answer» To neutralize completely 20 mL of 0.1molar aqueous of H₃PO₄,what volume of 0.1M KOH solution will be required?

Discussion

33.	100% pure sample of a divalent metal carbonate weighing2g on complete thermal decomposition releases 448 cc ofcarbon dioxide at STP. The equivalent mass of the metal is
Answer» 100% pure sample of a divalent metal carbonate weighing2g on complete thermal decomposition releases 448 cc ofcarbon dioxide at STP. The equivalent mass of the metal is

Discussion

34.	Oxidation state of both carbons CH3CH2OH
Answer» Oxidation state of both carbons CH3CH2OH

Discussion

35.	The boiling point of an aqueous solution of a nonvolatile solute is 100.15 ^° C. What is the freezingpoint of an aqueous solution obtained by dilutingthe above solution with an equal volume of water?The values of K and K, for water are 0.512 and1.86 K molality :(1)-0.544 ^° C (2)-0.512 C (3)-0.272 C (4)-1.86
Answer» The boiling point of an aqueous solution of a nonvolatile solute is 100.15 ^° C. What is the freezingpoint of an aqueous solution obtained by dilutingthe above solution with an equal volume of water?The values of K and K, for water are 0.512 and1.86 K molality :(1)-0.544 ^° C (2)-0.512 C (3)-0.272 C (4)-1.86

Discussion

36.	Which of the following is the correct order of decreasing SN2 reactivity
Answer» Which of the following is the correct order of decreasing $S N^{2}$ reactivity

Discussion

37.	The number of structural isomers for the alcohols with the formula C5H11OH is
Answer» The number of structural isomers for the alcohols with the formula C5H11OH is

Discussion

38.	Can you find out why the distance between two polynucleotide chains in DNA remains almost constant?
Answer» Can you find out why the distance between two polynucleotide chains in DNA remains almost constant?

Discussion

39.	If a saturated solution is prepared by dissolving Ag2CO3 in water has [Ag+]=2.56×10−4. What is the value of Ksp for Ag2CO3?
Answer» If a saturated solution is prepared by dissolving $A g_{2} C O_{3}$ in water has $[A g^{+}] = 2.56 \times 10^{- 4}$ . What is the value of $K_{s p}$ for $A g_{2} C O_{3}$ ?

Discussion

40.	X4+64
Answer» X4+64

Discussion

41.	100ml 0.5N NaOH is mixed in 10ml of 3N H2SO4 and 20 ml of 1N HCl solution. This mixture is not acid and base why?
Answer» 100ml 0.5N NaOH is mixed in 10ml of 3N H2SO4 and 20 ml of 1N HCl solution. This mixture is not acid and base why?

Discussion

42.	Question 131(ii)This table shows the mass of one atom for five chemical elements.Use it to answer the questions given.ElementsMass of atom(kg)Titanium7.95×10−26Lead3.44×10−25Silver1.79×10−25Lithium1.15×10−26Hydrogen1.674×10−27Which element is lighter, Silver or Titanium?
Answer» Question 131(ii) This table shows the mass of one atom for five chemical elements. Use it to answer the questions given. $\begin{matrix} E l e m e n t s & M a s s o f a t o m (k g) T i t a n i u m & 7.95 \times 10^{- 26} L e a d & 3.44 \times 10^{- 25} S i l v e r & 1.79 \times 10^{- 25} L i t h i u m & 1.15 \times 10^{- 26} H y d r o g e n & 1.674 \times 10^{- 27} \end{matrix}$ Which element is lighter, Silver or Titanium?

42.

Question 131(ii)This table shows the mass of one atom for five chemical elements.Use it to answer the questions given.ElementsMass of atom(kg)Titanium7.95×10−26Lead3.44×10−25Silver1.79×10−25Lithium1.15×10−26Hydrogen1.674×10−27Which element is lighter, Silver or Titanium?

Answer»

Question 131(ii)

This table shows the mass of one atom for five chemical elements.

Use it to answer the questions given.

$\begin{matrix} E l e m e n t s & M a s s o f a t o m (k g) T i t a n i u m & 7.95 \times 10^{- 26} L e a d & 3.44 \times 10^{- 25} S i l v e r & 1.79 \times 10^{- 25} L i t h i u m & 1.15 \times 10^{- 26} H y d r o g e n & 1.674 \times 10^{- 27} \end{matrix}$

Which element is lighter, Silver or Titanium?

Discussion

43.	What is the molality of 25.5% (w/w) H2O2 aqueous solution? (Give your answer upto two decimal places.)
Answer» What is the molality of 25.5% (w/w) $H_{2} O_{2}$ aqueous solution? (Give your answer upto two decimal places.)

Discussion

44.	Consider the reactions:(i) CO(g)+H2O(g)K1⇌CO2(g)+H2(g)(ii) CH4(g)+H2O(g)K2⇌CO(g)+3H2(g)(iii) CH4(g)+2H2O(g)K3⇌CO2(g)+4H2(g)Which of the following relation is correct?
Answer» Consider the reactions: $(i) C O (g) + H_{2} O (g)_{1} C O_{2} (g) + H_{2} (g) (i i) C H_{4} (g) + H_{2} O (g)_{2} C O (g) + 3 H_{2} (g) (i i i) C H_{4} (g) + 2 H_{2} O (g)_{3} C O_{2} (g) + 4 H_{2} (g)$ Which of the following relation is correct?

Discussion

45.	Name two poisonous gases which can be prepared from chlorine gas.
Answer» Name two poisonous gases which can be prepared from chlorine gas.

Discussion

46.	Two elements X and Y with atomic numbers ZX and ZY, produce X-rays with frequencies νX and νY. If the frequencies are in the ratio 16:9, then the corresponding atomic numbers ratio is :
Answer» Two elements $X$ and $Y$ with atomic numbers $Z_{X}$ and $Z_{Y}$ , produce X-rays with frequencies $ν_{X}$ and $ν_{Y}$ . If the frequencies are in the ratio $16 : 9$ , then the corresponding atomic numbers ratio is :

Discussion

47.	How to calculate bond order of superoxide?
Answer» How to calculate bond order of superoxide?

Discussion

48.	The correct acidic order of the following is :
Answer» The correct acidic order of the following is :

Discussion

49.	what is meant by ligand ??
Answer» what is meant by ligand ??

Discussion

50.	31. Which of them is linear polymer side to H bonding 1)H2O 2)NH3 3)HF 4)HCl
Answer» 31. Which of them is linear polymer side to H bonding 1)H2O 2)NH3 3)HF 4)HCl

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

What is the ratio of frequency of 3rd orbit of H atom to that of 2nd orbit of He+?

3BaCl2 + 2Na3P04-->Ba3(PO4) 2 + 6NaCl.Maximum amount of Ba3(PO4)2 formed when2 moles each of Na3PO4 and BaCl2 are allowed to react is3'4(1) 4 mol (2) 1 mol (3)2/3 mol(4) 1/3mol

82. in a unit cell a B C and D are present at corners Face centres body centres and edge centre if atoms touching one of the plane passing through two diagonal opposite edges are removed then formula of compound is

2 N HCl solution will have the same molar concentration as:

a) Calculate the mass of ammonia produced if 2.00 ×103 g of nitrogen reacts with 1.00 ×103 g. b) Will any of the two reagents will remain unreacted. If yes, which one and what would be its mass.

30. Calcium carbonate reacts with HCl to give CaCl,and CO2 according to the reaction:+ 2HCI(aq) CaCl, (aq) + CO2(g)CaCO3(s)H20(I) What mass of 20% impure CaCO3 isrequired to react completely with 250 mL of 0.50+M HCI?(1) 6.25 g(2) 5 g(3) 4.75 g(4) 7.8 g

72. A photon of wavelength 4×10 to the power -7m strikes on metal surface, the work function of the metal being 2.13 event. Calculate (i) energy of photon(ev),(ii) kinetic energy of emission,and (iii) velocity of photo electron (1ev=1.6020×10to the power -19 joule.

15. The electrolysis of molten KCl.MgCl2.6H2O gives- a) Mg only b) K only c) K& Mg only d) Mg & Cl2

if at certain temperature 40% of c2h6(g) dissociates into c2h4(g) and h2(g) and the equilibrium pressure becomes 5 atm then kp for the dissociation is?

What bolume of co2 at stp envolve when 1 kg of caco3 reacts with excess of dil.hcl

22. the AsF5 molecule is a trigonal pyramidal . the hydrid orbitals used by the As atoms for bonding are 1) dx - y ,dz , s , px ,py 2) dxy, s ,px, py,pz 3) s ,px ,py ,pz, dz 4) dx - y, s ,px , py , pz

Trans-form of polyisoprene is

33. Give all different numerical value of gas constant R

Contribution of an atom located at the edge centre in a cubic unit cell isएक घनीय एकक कोष्ठिका में कोर केन्द्र पर स्थित परमाणु का योगदान है

The size of the species I,I− &amp; I+ follows the order:

what is lederberg;s replica plate experiment?

The length of a metal wire is when the tension in it is T1 and when the tension in it is T2. The natural length of the wire:

Q6 Calculate the freezing point of an aqueous solution containing 10.50 g of MaBrz in 200 gof water (molar mass of MgBr2-184 g mol-1 ). Given Kf for water = 1.86 KKg mor

20. What is scum? Whu scum is formed when hard water is treated with soap?

The Conversion of an amide by action of NaOH and Br2 to primary amine that has one carbon less than the starting amide is known as Hofmann-Bromamide reaction. R−O||C−NH2Br2+NaOH−−−−−−−→(or)NaoBr R−NH2+NaBr+Na2CO3

An impure sample of a g 1.5 gram is heated with if to form 0.124 gram of Ag2S what was the percentage yield of ag2s

What is Kc for the following equilibriumwhen the equilibrium concentration of each substance is: [SO2]=0.60 M, [O2] = 0.82 M and [SO3] = 1.90 M ?

A vessel of volume 5L contains 1.4g of nitrogen at a temperature 1800K .The pressure of the gas if 30% of its molecules are dissociated into atoms at this temperature is

Benzoic acid is volatile compound or non volatile compound?

Calculate the hybridization of C2H2 using formula

The radii of F,F−,O and O−2 are in the order of

The mole fraction of component A in vapour phase is x1 and mole fraction of component A in liquid mixture is x2(P0A= vapour pressure of pure A; P0B = vapour pressure of pure B). What is the total pressure?

what is the reactivity order of haloarenes in nitration?

What will be the change of mass when 10g Mg is heated strongly in oxygen?

Why lattice enthalpy should be high for ionic bond to be stable

21. If we have CH3I and CH3Br which will have higher boiling point?

To neutralize completely 20 mL of 0.1molar aqueous of H3PO4,what volume of 0.1M KOH solution will be required?

100% pure sample of a divalent metal carbonate weighing2g on complete thermal decomposition releases 448 cc ofcarbon dioxide at STP. The equivalent mass of the metal is

Oxidation state of both carbons CH3CH2OH

Which of the following is the correct order of decreasing SN2 reactivity

The number of structural isomers for the alcohols with the formula C5H11OH is

Can you find out why the distance between two polynucleotide chains in DNA remains almost constant?

If a saturated solution is prepared by dissolving Ag2CO3 in water has [Ag+]=2.56×10−4. What is the value of Ksp for Ag2CO3?

X4+64

100ml 0.5N NaOH is mixed in 10ml of 3N H2SO4 and 20 ml of 1N HCl solution. This mixture is not acid and base why?

Question 131(ii)This table shows the mass of one atom for five chemical elements.Use it to answer the questions given.ElementsMass of atom(kg)Titanium7.95×10−26Lead3.44×10−25Silver1.79×10−25Lithium1.15×10−26Hydrogen1.674×10−27Which element is lighter, Silver or Titanium?

What is the molality of 25.5% (w/w) H2O2 aqueous solution? (Give your answer upto two decimal places.)

Consider the reactions:(i) CO(g)+H2O(g)K1⇌CO2(g)+H2(g)(ii) CH4(g)+H2O(g)K2⇌CO(g)+3H2(g)(iii) CH4(g)+2H2O(g)K3⇌CO2(g)+4H2(g)Which of the following relation is correct?

Name two poisonous gases which can be prepared from chlorine gas.

Two elements X and Y with atomic numbers ZX and ZY, produce X-rays with frequencies νX and νY. If the frequencies are in the ratio 16:9, then the corresponding atomic numbers ratio is :

How to calculate bond order of superoxide?

The correct acidic order of the following is :

what is meant by ligand ??

31. Which of them is linear polymer side to H bonding 1)H2O 2)NH3 3)HF 4)HCl

The size of the species I,I− & I+ follows the order: