46295 + Interview Questions in Chemistry

1.	73 Which is a better nucleophile : Methoxide or tert-butoxide
Answer» 73 Which is a better nucleophile : Methoxide or tert-butoxide

Discussion

2.	Equal masses of H2,He and CH4 are mixed in an empty container at 300k,when total pressure is 2.6 atm. The partial pressure of H2 in the mixture is
Answer» Equal masses of H2,He and CH4 are mixed in an empty container at 300k,when total pressure is 2.6 atm. The partial pressure of H2 in the mixture is

Discussion

3.	A magnesium ribbon, when burnt in air, left an ash containing MgO and Mg3N2. The ash was found to consume 0.6 mole of HCl, when it was taken in solution, according to the following reaction:Mg3N2 + 8HCl → 3MgCl2 + 2NH4ClThe solution obtained was treated with excess of NaOH, when 0.1 mole of NH3 was evolved. The mass (in g) of magnesium burnt is: 6
Answer» A magnesium ribbon, when burnt in air, left an ash containing $M g O$ and $M g_{3} N_{2}$ . The ash was found to consume 0.6 mole of HCl, when it was taken in solution, according to the following reaction: $M g_{3} N_{2}$ + $8 H C l$ $\to$ $3 M g C l_{2}$ + $2 N H_{4} C l$ The solution obtained was treated with excess of $N a O H$ , when $0.1 m o l e$ of $N H_{3}$ was evolved. The mass (in $g$ ) of magnesium burnt is: 6

Discussion

4.	What is the change in internal energy when a gas contracts from 377 mL to 177 mL under a constant pressure of 2 atm, while at the same time being cooled by removing 124 J heat? [Take: 1 L atm = 100 J]
Answer» What is the change in internal energy when a gas contracts from $377$ mL to $177$ mL under a constant pressure of 2 atm, while at the same time being cooled by removing $124 J$ heat? [Take: $1 L a t m$ = $100 J$ ]

Discussion

5.	the rms speed of oxygen is v at a particular temperature.if the temperature is doubled and oxygen molecules dissociate into oxygen atoms,the rms speed becomes
Answer» the rms speed of oxygen is v at a particular temperature.if the temperature is doubled and oxygen molecules dissociate into oxygen atoms,the rms speed becomes

Discussion

6.	17. nack crystallises in bcc arrangement with interfacial separation between atoms at the edge 53pm.the density of the solid in g/cc is 1)1.23 2)485 3)4.85 4)123
Answer» 17. nack crystallises in bcc arrangement with interfacial separation between atoms at the edge 53pm.the density of the solid in g/cc is 1)1.23 2)485 3)4.85 4)123

Discussion

7.	1 mole contains how many atoms
Answer» 1 mole contains how many atoms

Discussion

8.	In benzye, the triple bond consists of
Answer» In benzye, the triple bond consists of

Discussion

9.	Geometrical and Optical isomerism are types of:
Answer» Geometrical and Optical isomerism are types of:

Discussion

10.	the rate of the chemical reaction doubles for an increase of 10K in absolute temperature from 298K.Calculate Ea
Answer» the rate of the chemical reaction doubles for an increase of 10K in absolute temperature from 298K.Calculate Ea

Discussion

11.	Assign number 1 for least to 4 for most, to indicate the relativebase strength of the following(1)C6H5NH2(2)p-NO2C6H4NH2(3)m-NO2C6H4NH2(4)P-CH3OC6H4NH2
Answer» Assign number 1 for least to 4 for most, to indicate the relative base strength of the following (1)C6H5NH2 (2)p-NO2C6H4NH2 (3)m-NO2C6H4NH2 (4)P-CH3OC6H4NH2

Discussion

12.	In the following reactions, how is the rate of appearance of the product related to the rate of disappearance of the reactant? BrO−3+5Br−+6HZ+→3Br2+3H2O
Answer» In the following reactions, how is the rate of appearance of the product related to the rate of disappearance of the reactant? $B r O_{3}^{-} + 5 B r^{-} + 6 H Z^{+} \to 3 B r_{2} + 3 H_{2} O$

Discussion

13.	What volume of Gas evolved at stp when h2so4 using 2F
Answer» What volume of Gas evolved at stp when h2so4 using 2F

Discussion

14.	A->products, [A]=2M after 10min reaction is 10% completed. If d[A]/dt=k[A],then t1/2 is approximately
Answer» A->products, [A]=2M after 10min reaction is 10% completed. If d[A]/dt=k[A],then t1/2 is approximately

Discussion

15.	55 A reaction of ethyl amine & acetic anhydride leads to the formation of??
Answer» 55 A reaction of ethyl amine & acetic anhydride leads to the formation of??

Discussion

16.

An oxide of sulphur contains 50 % S. What will be its emprical formula ? (1) SO (2) SO2 (3) SO3 (4) S2O3

Answer»

An oxide of sulphur contains 50 % S. What will be its emprical formula ?

(1)	SO
(2)	SO₂
(3)	SO₃
(4)	S₂O₃

Discussion

17.	The two bulbs of volume 5 litre and 10 litre containingan ideal gas at 9 atm and 6 atm respectively areconnected. What is the final pressure in the twobulbs if the temperature remains constant?
Answer» The two bulbs of volume 5 litre and 10 litre containingan ideal gas at 9 atm and 6 atm respectively areconnected. What is the final pressure in the twobulbs if the temperature remains constant?

Discussion

18.	The solubility of barium sulphate at 298 K is 1.05×10mol dm. Calculate the solubility product.
Answer» The solubility of barium sulphate at 298 K is $1.05 \times 10 m o l d m$ . Calculate the solubility product.

Discussion

19.	process of dehydration of benzylic and allylic alohols??
Answer» process of dehydration of benzylic and allylic alohols??

Discussion

20.	31. What is the value of i for KNO3solution and CH3COOH solution with same concenteration
Answer» 31. What is the value of i for KNO3solution and CH3COOH solution with same concenteration

Discussion

21.	Q 13/30 Two liquids A and B form ideal solutions. At 300K, thevapour pressure of solution containing 1 mole of A and 3 mole of Bis 550 mm Hg. At the same temperature, if one more mole of B isadded to this solution, the vapour pressure of the solution increaseby 10 mm Hg. The vapour pressure of A and B in their pure state (inmm Hg) respectively are
Answer» Q 13/30 Two liquids A and B form ideal solutions. At 300K, thevapour pressure of solution containing 1 mole of A and 3 mole of Bis 550 mm Hg. At the same temperature, if one more mole of B isadded to this solution, the vapour pressure of the solution increaseby 10 mm Hg. The vapour pressure of A and B in their pure state (inmm Hg) respectively are

Discussion

22.	Cotton is a natural polymer. What is its chemical name?
Answer» Cotton is a natural polymer. What is its chemical name?

Discussion

23.	how to determine stability of a organic compound
Answer» how to determine stability of a organic compound

Discussion

24.	Which of the following compounds will show the maximum enol content?
Answer» Which of the following compounds will show the maximum enol content?

Discussion

25.	Initiators used for cationic polymerisation are
Answer» Initiators used for cationic polymerisation are

Discussion

26.	Which of the following alkyl halide cannot be converted into Grignard reagent?
Answer» Which of the following alkyl halide cannot be converted into Grignard reagent?

Discussion

27.	The compound that undergoes decarboxylation most readily under mild condition is:
Answer» The compound that undergoes decarboxylation most readily under mild condition is:

Discussion

28.	if E^° Fe^{+2}\vert Fe is x1 &E^° Fe^{+2} \vert fe is x2 then E^° Fe^{+3}\vert Fe^{+2 }will b
Answer» if E^° Fe^{+2}\vert Fe is x1 &E^° Fe^{+2} \vert fe is x2 then E^° Fe^{+3}\vert Fe^{+2 }will b

Discussion

29.	In the following sequence of reactions CH3−BrKCN→AH3O+→BLiAIH4−−−−−→etherC, the end product (C) is:
Answer» In the following sequence of reactions $C H_{3} - B r K C N \to A H_{3} O^{+} \to B L i A I H_{4} - ---- \to e t h e r C,$ the end product (C) is:

Discussion

30.	Identify the position where electrophilic aromatic substitution (EAS) is most favourable.
Answer» Identify the position where electrophilic aromatic substitution $(E A S)$ is most favourable.

Discussion

31.	Writethe reactions of F2and Cl2with water.
Answer» Write the reactions of F₂ and Cl₂ with water.

Discussion

32.	What is the IUPAC name of the organic compound formed in the following chemical reaction ?
Answer» What is the $I U P A C$ name of the organic compound formed in the following chemical reaction ?

Discussion

33.	The common characteristic of cis-2-butene and trans-2-butene is:
Answer» The common characteristic of cis-2-butene and trans-2-butene is:

Discussion

34.	Why the gases have two specific heat capacity?
Answer» Why the gases have two specific heat capacity?

Discussion

35.	If 0.1 g of an organic compound contains phosphorus gave 0.222 g of Mg2P2O7, then the percentage of phosphorus in the compound is:
Answer» If $0.1 g$ of an organic compound contains phosphorus gave $0.222 g of M g_{2} P_{2} O_{7}$ , then the percentage of phosphorus in the compound is:

Discussion

36.	On what values does the state function depends?
Answer» On what values does the state function depends?

Discussion

37.	The sum of any positive number and its reciprocal is always greater than or equal to
Answer» The sum of any positive number and its reciprocal is always greater than or equal to

Discussion

38.	Which of the following hydrides has highest reducing power?A ch4B sih4C geh4D snh4
Answer» Which of the following hydrides has highest reducing power? A ch4 B sih4 C geh4 D snh4

Discussion

39.	Convert(i) 3-Methylaniline into3-nitrotoluene.(ii) Aniline into 1,3,5-tribromobenzene.
Answer» Convert (i) 3-Methylaniline into 3-nitrotoluene. (ii) Aniline into 1,3,5-tribromobenzene.

39.

Convert(i) 3-Methylaniline into3-nitrotoluene.(ii) Aniline into 1,3,5-tribromobenzene.

Answer»

Convert

(i)
3-Methylaniline into
3-nitrotoluene.

(ii)
Aniline into 1,3,5-tribromobenzene.

Discussion

40.	A mixture of two organic chlorine compounds was treated with sodium metal in ether solution. Isobutane was obtained as a product. The two chlorine compounds are [KCET 1988]
Answer» A mixture of two organic chlorine compounds was treated with sodium metal in ether solution. Isobutane was obtained as a product. The two chlorine compounds are [KCET 1988]

40.

A mixture of two organic chlorine compounds was treated with sodium metal in ether solution. Isobutane was obtained as a product. The two chlorine compounds are [KCET 1988]

Answer»

A mixture of two organic chlorine compounds was treated with sodium metal in ether solution. Isobutane was obtained as a product. The two chlorine compounds are

[KCET 1988]

Discussion

41.	Why the inductomeric effect is limited to 3 carbon?
Answer» Why the inductomeric effect is limited to 3 carbon?

Discussion

42.	Write the IUPAC name of isopropane and draw its structural formula?
Answer» Write the IUPAC name of isopropane and draw its structural formula?

Discussion

43.	For the following question, the answer is an integer between 0 and 9 (both inclusive). In the Ellingham diagram for oxides, there are _____ lines for the reaction(s) between C and O. ___
Answer» For the following question, the answer is an integer between 0 and 9 (both inclusive). In the Ellingham diagram for oxides, there are _____ lines for the reaction(s) between C and O. ___

43.

For the following question, the answer is an integer between 0 and 9 (both inclusive). In the Ellingham diagram for oxides, there are ___ lines for the reaction(s) between C and O. _

Answer»

For the following question, the answer is an integer between 0 and 9 (both inclusive).

In the Ellingham diagram for oxides, there are _____ lines for the reaction(s) between C and O.

___

Discussion

44.	What is the product when one equivalent of HBr is treated with but-1-en-3-yne? Give the mechanism too.
Answer» What is the product when one equivalent of HBr is treated with but-1-en-3-yne? Give the mechanism too.

Discussion

45.	Which of the following compunds are readily soluble in water.? (a) BeSO4 (b) MgSO4 (c) BaSO4 (d) SrSO4
Answer» Which of the following compunds are readily soluble in water.? (a) $B e S O_{4}$ (b) $M g S O_{4}$ (c) $B a S O_{4}$ (d) $S r S O_{4}$

45.

Which of the following compunds are readily soluble in water.? (a) BeSO4 (b) MgSO4 (c) BaSO4 (d) SrSO4

Answer»

Which of the following compunds are readily soluble in water.?

(a) $B e S O_{4}$ (b) $M g S O_{4}$ (c) $B a S O_{4}$ (d) $S r S O_{4}$

Discussion

46.	are secondary amines optically active(tertairy arent due to inversion likewise is secondary also due to racemisation)
Answer» are secondary amines optically active (tertairy arent due to inversion likewise is secondary also due to racemisation)

Discussion

47.	What will be the central atom in XeOF4?
Answer» What will be the central atom in $X e O F_{4}$ ?

Discussion

48.	Calculate the equilibrium concentration of B+ ions in a solution obtained by mixing equal volume of 0.02 M AOH and 0.2 M BOH solution. Given that, Kb(AOH)=1×10−8 Kb(BOH)=2×10−9
Answer» Calculate the equilibrium concentration of $B^{+}$ ions in a solution obtained by mixing equal volume of 0.02 M $A O H$ and 0.2 M $B O H$ solution. Given that, $K_{b} (A O H) = 1 \times 10^{- 8}$ $K_{b} (B O H) = 2 \times 10^{- 9}$

Discussion

49.	14. Calculate the molarity of a solution of CaCl2 if on chemical analysis it is found that 500 ml of CaCl2 solution contains 1.505*10 is to power 23 Cl- ion
Answer» 14. Calculate the molarity of a solution of CaCl2 if on chemical analysis it is found that 500 ml of CaCl2 solution contains 1.505*10 is to power 23 Cl- ion

Discussion

50.	the compound possessing maximum covalent character among the following is(1) LiCl (2) NaCl (3) CsCl (4) KCl
Answer» the compound possessing maximum covalent character among the following is (1) LiCl (2) NaCl (3) CsCl (4) KCl

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

73 Which is a better nucleophile : Methoxide or tert-butoxide

Equal masses of H2,He and CH4 are mixed in an empty container at 300k,when total pressure is 2.6 atm. The partial pressure of H2 in the mixture is

What is the change in internal energy when a gas contracts from 377 mL to 177 mL under a constant pressure of 2 atm, while at the same time being cooled by removing 124 J heat? [Take: 1 L atm = 100 J]

the rms speed of oxygen is v at a particular temperature.if the temperature is doubled and oxygen molecules dissociate into oxygen atoms,the rms speed becomes

17. nack crystallises in bcc arrangement with interfacial separation between atoms at the edge 53pm.the density of the solid in g/cc is 1)1.23 2)485 3)4.85 4)123

1 mole contains how many atoms

In benzye, the triple bond consists of

Geometrical and Optical isomerism are types of:

the rate of the chemical reaction doubles for an increase of 10K in absolute temperature from 298K.Calculate Ea

Assign number 1 for least to 4 for most, to indicate the relativebase strength of the following(1)C6H5NH2(2)p-NO2C6H4NH2(3)m-NO2C6H4NH2(4)P-CH3OC6H4NH2

In the following reactions, how is the rate of appearance of the product related to the rate of disappearance of the reactant? BrO−3+5Br−+6HZ+→3Br2+3H2O

What volume of Gas evolved at stp when h2so4 using 2F

A-&gt;products, [A]=2M after 10min reaction is 10% completed. If d[A]/dt=k[A],then t1/2 is approximately

55 A reaction of ethyl amine & acetic anhydride leads to the formation of??

An oxide of sulphur contains 50 % S. What will be its emprical formula ? (1) SO (2) SO2 (3) SO3 (4) S2O3

The two bulbs of volume 5 litre and 10 litre containingan ideal gas at 9 atm and 6 atm respectively areconnected. What is the final pressure in the twobulbs if the temperature remains constant?

The solubility of barium sulphate at 298 K is 1.05×10mol dm. Calculate the solubility product.

process of dehydration of benzylic and allylic alohols??

31. What is the value of i for KNO3solution and CH3COOH solution with same concenteration

Cotton is a natural polymer. What is its chemical name?​

how to determine stability of a organic compound

Which of the following compounds will show the maximum enol content?

Initiators used for cationic polymerisation are

Which of the following alkyl halide cannot be converted into Grignard reagent?

The compound that undergoes decarboxylation most readily under mild condition is:

if E^° Fe^{+2}\vert Fe is x1 &E^° Fe^{+2} \vert fe is x2 then E^° Fe^{+3}\vert Fe^{+2 }will b

In the following sequence of reactions CH3−BrKCN→AH3O+→BLiAIH4−−−−−→etherC, the end product (C) is:

Identify the position where electrophilic aromatic substitution (EAS) is most favourable.

Writethe reactions of F2and Cl2with water.

What is the IUPAC name of the organic compound formed in the following chemical reaction ?

The common characteristic of cis-2-butene and trans-2-butene is:

Why the gases have two specific heat capacity?

If 0.1 g of an organic compound contains phosphorus gave 0.222 g of Mg2P2O7, then the percentage of phosphorus in the compound is:

On what values does the state function depends?

The sum of any positive number and its reciprocal is always greater than or equal to

Which of the following hydrides has highest reducing power?A ch4B sih4C geh4D snh4

Convert(i) 3-Methylaniline into3-nitrotoluene.(ii) Aniline into 1,3,5-tribromobenzene.

A mixture of two organic chlorine compounds was treated with sodium metal in ether solution. Isobutane was obtained as a product. The two chlorine compounds are [KCET 1988]

Why the inductomeric effect is limited to 3 carbon?

Write the IUPAC name of isopropane and draw its structural formula?

For the following question, the answer is an integer between 0 and 9 (both inclusive). In the Ellingham diagram for oxides, there are _____ lines for the reaction(s) between C and O. ___

What is the product when one equivalent of HBr is treated with but-1-en-3-yne? Give the mechanism too.

Which of the following compunds are readily soluble in water.? (a) BeSO4 (b) MgSO4 (c) BaSO4 (d) SrSO4

are secondary amines optically active(tertairy arent due to inversion likewise is secondary also due to racemisation)

What will be the central atom in XeOF4?

Calculate the equilibrium concentration of B+ ions in a solution obtained by mixing equal volume of 0.02 M AOH and 0.2 M BOH solution. Given that, Kb(AOH)=1×10−8 Kb(BOH)=2×10−9

14. Calculate the molarity of a solution of CaCl2 if on chemical analysis it is found that 500 ml of CaCl2 solution contains 1.505*10 is to power 23 Cl- ion

the compound possessing maximum covalent character among the following is(1) LiCl (2) NaCl (3) CsCl (4) KCl

A->products, [A]=2M after 10min reaction is 10% completed. If d[A]/dt=k[A],then t1/2 is approximately

Cotton is a natural polymer. What is its chemical name?

For the following question, the answer is an integer between 0 and 9 (both inclusive). In the Ellingham diagram for oxides, there are ___ lines for the reaction(s) between C and O. _