46295 + Interview Questions in Chemistry

1.	17. Which of the following option(s) is correct? (1) d(CF) in CH3F < CHF3 (2) d(OF) in O2F2 < OF2 (3) d(PCl) in PCl2F3 < PCl3F2 (4) d(BO) in [B(OH)4] < B(OH)3
Answer» 17. Which of the following option(s) is correct? (1) d(CF) in CH3F < CHF3 (2) d(OF) in O2F2 < OF2 (3) d(PCl) in PCl2F3 < PCl3F2 (4) d(BO) in [B(OH)4] < B(OH)3

Discussion

2.	Calculate the mass of sulphuric acid present in 100 ml of 15 % mass by mass solution of sulphuric acid ( density = 1. 1g/mL)
Answer» Calculate the mass of sulphuric acid present in 100 ml of 15 % mass by mass solution of sulphuric acid ( density = 1. 1g/mL)

Discussion

3.	Write chemical equations for combustion reaction of the following hydrocarbons: (i) Butane (ii) Pentene (iii) Hexyne (iv) Toluene
Answer» Write chemical equations for combustion reaction of the following hydrocarbons: (i) Butane (ii) Pentene (iii) Hexyne (iv) Toluene

3.

Write chemical equations for combustion reaction of the following hydrocarbons: (i) Butane (ii) Pentene (iii) Hexyne (iv) Toluene

Answer»

Write chemical equations for combustion reaction of the following hydrocarbons:
(i) Butane

(ii) Pentene

(iii) Hexyne

(iv) Toluene

Discussion

4.	what is refractive index
Answer» what is refractive index

Discussion

5.	When tert-butylchloride is added to an equal amount of ethanol in an inert solvent, one of the products is ethyl tert-butyl ether. When the concentration of ethanol is doubled, the rate of the reaction:
Answer» When tert-butylchloride is added to an equal amount of ethanol in an inert solvent, one of the products is ethyl tert-butyl ether. When the concentration of ethanol is doubled, the rate of the reaction:

Discussion

6.	What is the rms speed of a gas molecule of mass 10−22 g at room temperature 27∘ C according to the kinetic theory of gases?
Answer» What is the rms speed of a gas molecule of mass $10^{- 22} g$ at room temperature $27^{\circ} C$ according to the kinetic theory of gases?

Discussion

7.	Which of the following structural isomers of compound C4H9Br is most reactive towards SN1 reaction ?
Answer» Which of the following structural isomers of compound $C_{4} H_{9} B r$ is most reactive towards $S_{N} 1$ reaction ?

Discussion

8.	Equimolar conc. of H2 and I2 are heated to equilibrium in a 2l flask. At equilibrium the forward and backward rate constants are found to be equal. What percent of initial conc. of H2 has reacted at equilibrium?
Answer» Equimolar conc. of H2 and I2 are heated to equilibrium in a 2l flask. At equilibrium the forward and backward rate constants are found to be equal. What percent of initial conc. of H2 has reacted at equilibrium?

Discussion

9.	which of the following is not a chiral compound?(1)hexane (2)n-butane (3)methane (4)2,3,4-trimethylhexane
Answer» which of the following is not a chiral compound? (1)hexane (2)n-butane (3)methane (4)2,3,4-trimethylhexane

Discussion

10.	How the number of ion in ccp is 4??
Answer» How the number of ion in ccp is 4??

Discussion

11.	Write balance equation of K2Cr2O7+HCl
Answer» Write balance equation of K2Cr2O7+HCl

Discussion

12.	The variation of vapour pressure of different liquids with temperature is shown in fugure (i) Calculate graphically boiling points of liquids A and B. (ii) If we take liquid C in a closed vessel and heat it continuously. At what temperature will it boil? (iii) At high altitude, atmospheric pressure is low (say 60 mm Hg). At what temperature liquid D boils? (iv) Pressure coojer is used for cooking food at hill station. Explain in terms of vapour pressure why is it so?
Answer» The variation of vapour pressure of different liquids with temperature is shown in fugure (i) Calculate graphically boiling points of liquids A and B. (ii) If we take liquid C in a closed vessel and heat it continuously. At what temperature will it boil? (iii) At high altitude, atmospheric pressure is low (say 60 mm Hg). At what temperature liquid D boils? (iv) Pressure coojer is used for cooking food at hill station. Explain in terms of vapour pressure why is it so?

12.

The variation of vapour pressure of different liquids with temperature is shown in fugure (i) Calculate graphically boiling points of liquids A and B. (ii) If we take liquid C in a closed vessel and heat it continuously. At what temperature will it boil? (iii) At high altitude, atmospheric pressure is low (say 60 mm Hg). At what temperature liquid D boils? (iv) Pressure coojer is used for cooking food at hill station. Explain in terms of vapour pressure why is it so?

Answer»

The variation of vapour pressure of different liquids with temperature is shown in fugure

(i) Calculate graphically boiling points of liquids A and B.

(ii) If we take liquid C in a closed vessel and heat it continuously. At what temperature will it boil?

(iii) At high altitude, atmospheric pressure is low (say 60 mm Hg). At what temperature liquid D boils?

(iv) Pressure coojer is used for cooking food at hill station. Explain in terms of vapour pressure why is it so?

Discussion

13.	AlF3+B2O3 → ________ +BF3
Answer» $A l F_{3} + B_{2} O_{3}$ $\to$ ________ $+ B F_{3}$

Discussion

14.	52.Calculate the moles of pure kclo3 present in x gram of a sample of impure KCLO3 which on strong heating gives y ml of o2 at STP?
Answer» 52.Calculate the moles of pure kclo3 present in x gram of a sample of impure KCLO3 which on strong heating gives y ml of o2 at STP?

Discussion

15.	When glycerol is treated with an excess of HI, it produces:
Answer» When glycerol is treated with an excess of HI, it produces:

Discussion

16.	How to find number of isomers of any functional isomers?
Answer» How to find number of isomers of any functional isomers?

Discussion

17.	How does the use of ch3cooh, naoh or hcl along with Zn able to enhance the process of reduction of haloalkanes?
Answer» How does the use of ch3cooh, naoh or hcl along with Zn able to enhance the process of reduction of haloalkanes?

Discussion

18.	what is meant by tube within tube type?
Answer» what is meant by tube within tube type?

Discussion

19.	the ionic product of an ionic solid 1. can be equal to or less than ksp 2.is always equal to ksp 3.is always less than ksp 4.can be lessthan ,equal to or greater than ks
Answer» the ionic product of an ionic solid 1. can be equal to or less than ksp 2.is always equal to ksp 3.is always less than ksp 4.can be lessthan ,equal to or greater than ks

Discussion

20.	Which of the following is not the product of dehydration of the given compound?
Answer» Which of the following is not the product of dehydration of the given compound?

Discussion

21.	Find the n-factor in the following chemical changes. KMnO4 OH− −−−−→Mn6+
Answer» Find the n-factor in the following chemical changes. $K M n O_{4} O H^{-} - --- \to M n^{6 +}$

Discussion

22.	A closed cylindrical vessel contains 10 moles of an ideal diatomic gas at a temperature of 300 k on supplying heat temperature remains the same but 5 moles get dissociated into atoms the heat supplied is:
Answer» A closed cylindrical vessel contains 10 moles of an ideal diatomic gas at a temperature of 300 k on supplying heat temperature remains the same but 5 moles get dissociated into atoms the heat supplied is:

Discussion

23.	Product 'P' can be
Answer» Product 'P' can be

Discussion

24.	1) What is the meaning of mole in the Avogadro law ?
Answer» 1) What is the meaning of mole in the Avogadro law ?

Discussion

25.	Lucas reagent (anhyd. ZnCl2 and conc HCl) was added to a certain alcohol, turbidity appeared immediately. What type of alcohol it is?
Answer» Lucas reagent (anhyd. ZnCl₂ and conc HCl) was added to a certain alcohol, turbidity appeared immediately. What type of alcohol it is?

Discussion

26.	If one mole of a strong acid reacts with one mole of strong base , the heat produced is always same. Why?
Answer» If one mole of a strong acid reacts with one mole of strong base , the heat produced is always same. Why?

Discussion

27.	What is a quark material
Answer» What is a quark material

Discussion

28.	The least reactive compound towards electrophilic substitution with given electrophile is
Answer» The least reactive compound towards electrophilic substitution with given electrophile is

Discussion

29.	A Grignard reagent is prepared by the action of magnesium in dry ether on
Answer» A Grignard reagent is prepared by the action of magnesium in dry ether on

Discussion

30.	In which of the following pairs, the first compound has a higher boiling point than the second?
Answer» In which of the following pairs, the first compound has a higher boiling point than the second?

Discussion

31.	The correct increasing order of X−O−X bond angle is: (X=H, F or Cl)
Answer» The correct increasing order of $X - O - X$ bond angle is: $(X = H, F o r C l)$

Discussion

32.	K2Cr2O7 on heating with aqueous NaOH, gives:
Answer» $K_{2} C r_{2} O_{7}$ on heating with aqueous $N a O H$ , gives:

Discussion

33.	F-, Na+, Mg2+ are isoelctronic species. Which one is correct?1)all have same size 2)Mg2+ have minimum effective nuclear charge 3)F- have smallest size 4)Mg2+have maximum effective nuclear charge
Answer» F-, Na+, Mg2+ are isoelctronic species. Which one is correct? 1)all have same size 2)Mg2+ have minimum effective nuclear charge 3)F- have smallest size 4)Mg2+have maximum effective nuclear charge

Discussion

34.	ntrate of reaction between two reactantsA,B decreses by factorof 4if conc of reactantB Is doubled.order of reactionw.r.t reactantB IS?n
Answer» ntrate of reaction between two reactantsA,B decreses by factorof 4if conc of reactantB Is doubled.order of reactionw.r.t reactantB IS?n

Discussion

35.	Different organic reactions with their product are given below. Select the incorrect reaction.
Answer» Different organic reactions with their product are given below. Select the incorrect reaction.

Discussion

36.	25.The drain cleaner drainex contains small bit of aluminum which react with caustic sod to produce dihydrogen. What volume of dihydrogen at 20 degree celcius and one bar will be realised when 0.15g of aluminum reacts?
Answer» 25.The drain cleaner drainex contains small bit of aluminum which react with caustic sod to produce dihydrogen. What volume of dihydrogen at 20 degree celcius and one bar will be realised when 0.15g of aluminum reacts?

Discussion

37.	Element Y has second valence shell,and it can form a stable compound with element X_{11. }If the formula of the compound is X_2Y ,what is the atomic number of Y ?
Answer» Element Y has second valence shell,and it can form a stable compound with element X_{11. }If the formula of the compound is X_2Y ,what is the atomic number of Y ?

Discussion

38.	What volume of 1 M NaOH (in ml) will be required to react completely with 100g of oleum which is 109% labelled?
Answer» What volume of 1 M NaOH (in ml) will be required to react completely with 100g of oleum which is 109% labelled?

Discussion

39.	Arrange the following sresonating structures in decreasing order of stability:
Answer» Arrange the following sresonating structures in decreasing order of stability:

Discussion

40.	Which statement is true for a metal
Answer» Which statement is true for a metal

Discussion

41.	which is more basic pyridine or piperidine
Answer» which is more basic pyridine or piperidine

Discussion

42.	Which will make basic buffer ?
Answer» Which will make basic buffer ?

Discussion

43.	There is no S to S bond in
Answer» There is no S to S bond in

Discussion

44.	A group 15 element, which is a metal and forms a hydride with strongest reducing power among group 15 hydrides. The element is:
Answer» A group $15$ element, which is a metal and forms a hydride with strongest reducing power among group $15$ hydrides. The element is:

Discussion

45.	4g of a mixture of Na2CO3 and NaHCO3 on heating liberates 448 mL of CO2 at STP. The percentage of Na2CO3 in the mixture is?
Answer» 4g of a mixture of Na₂CO₃and NaHCO₃ on heating liberates 448 mL of CO₂ at STP. The percentage of Na₂CO₃ in the mixture is?

Discussion

46.	26. Give the stereochemical mechanism of chain opening acid catalysed reaction of epoxide.
Answer» 26. Give the stereochemical mechanism of chain opening acid catalysed reaction of epoxide.

Discussion

47.	47. A 0.004 M solution of Na2SO4 is isotonic with a 0.01M solution of glucose at same temperature. The apparent degree of dissociation ofNa2SO4 is. 1. 25% 2. 50% 3. 75% 4. 85%
Answer» 47. A 0.004 M solution of Na2SO4 is isotonic with a 0.01M solution of glucose at same temperature. The apparent degree of dissociation ofNa2SO4 is. 1. 25% 2. 50% 3. 75% 4. 85%

Discussion

48.	all the four sigma bond in perchlorate io are sp3-sp3 or sp2-sp
Answer» all the four sigma bond in perchlorate io are sp3-sp3 or sp2-sp

Discussion

49.	An organic compound (C3H9N)(A) when treated with nitrous acid, gave an alcohol and N2 gas was evolved. (A) on warming with CHCl3 and caustic potash gave (C), which on reduction gave isopropylmethylamine. Predict the structure of (A).
Answer» An organic compound $(C_{3} H_{9} N) (A)$ when treated with nitrous acid, gave an alcohol and $N_{2}$ gas was evolved. $(A)$ on warming with $C H C l_{3}$ and caustic potash gave $(C)$ , which on reduction gave isopropylmethylamine. Predict the structure of $(A)$ .

Discussion

50.	The compound when heated with CaO doesn't form a cyclic structure Succinic acid Malonic acid Malic acid Glutaric acid Give mechanism for cyclic structure in other three
Answer» The compound when heated with CaO doesn't form a cyclic structure Succinic acid Malonic acid Malic acid Glutaric acid Give mechanism for cyclic structure in other three

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

17. Which of the following option(s) is correct? (1) d(CF) in CH3F < CHF3 (2) d(OF) in O2F2 < OF2 (3) d(PCl) in PCl2F3 < PCl3F2 (4) d(BO) in [B(OH)4] < B(OH)3

Calculate the mass of sulphuric acid present in 100 ml of 15 % mass by mass solution of sulphuric acid ( density = 1. 1g/mL)

Write chemical equations for combustion reaction of the following hydrocarbons: (i) Butane (ii) Pentene (iii) Hexyne (iv) Toluene

what is refractive index

When tert-butylchloride is added to an equal amount of ethanol in an inert solvent, one of the products is ethyl tert-butyl ether. When the concentration of ethanol is doubled, the rate of the reaction:

What is the rms speed of a gas molecule of mass 10−22 g at room temperature 27∘ C according to the kinetic theory of gases?

Which of the following structural isomers of compound C4H9Br is most reactive towards SN1 reaction ?

Equimolar conc. of H2 and I2 are heated to equilibrium in a 2l flask. At equilibrium the forward and backward rate constants are found to be equal. What percent of initial conc. of H2 has reacted at equilibrium?

which of the following is not a chiral compound?(1)hexane (2)n-butane (3)methane (4)2,3,4-trimethylhexane

How the number of ion in ccp is 4??

Write balance equation of K2Cr2O7+HCl

AlF3+B2O3 → ________ +BF3

52.Calculate the moles of pure kclo3 present in x gram of a sample of impure KCLO3 which on strong heating gives y ml of o2 at STP?

When glycerol is treated with an excess of HI, it produces:

How to find number of isomers of any functional isomers?

How does the use of ch3cooh, naoh or hcl along with Zn able to enhance the process of reduction of haloalkanes?

what is meant by tube within tube type?

the ionic product of an ionic solid 1. can be equal to or less than ksp 2.is always equal to ksp 3.is always less than ksp 4.can be lessthan ,equal to or greater than ks

Which of the following is not the product of dehydration of the given compound?

Find the n-factor in the following chemical changes. KMnO4 OH− −−−−→Mn6+

A closed cylindrical vessel contains 10 moles of an ideal diatomic gas at a temperature of 300 k on supplying heat temperature remains the same but 5 moles get dissociated into atoms the heat supplied is:

Product 'P' can be

1) What is the meaning of mole in the Avogadro law ?

Lucas reagent (anhyd. ZnCl2 and conc HCl) was added to a certain alcohol, turbidity appeared immediately. What type of alcohol it is?

If one mole of a strong acid reacts with one mole of strong base , the heat produced is always same. Why?

What is a quark material

The least reactive compound towards electrophilic substitution with given electrophile is

A Grignard reagent is prepared by the action of magnesium in dry ether on

In which of the following pairs, the first compound has a higher boiling point than the second?

The correct increasing order of X−O−X bond angle is: (X=H, F or Cl)

K2Cr2O7 on heating with aqueous NaOH, gives:

F-, Na+, Mg2+ are isoelctronic species. Which one is correct?1)all have same size 2)Mg2+ have minimum effective nuclear charge 3)F- have smallest size 4)Mg2+have maximum effective nuclear charge

ntrate of reaction between two reactantsA,B decreses by factorof 4if conc of reactantB Is doubled.order of reactionw.r.t reactantB IS?n

Different organic reactions with their product are given below. Select the incorrect reaction.

25.The drain cleaner drainex contains small bit of aluminum which react with caustic sod to produce dihydrogen. What volume of dihydrogen at 20 degree celcius and one bar will be realised when 0.15g of aluminum reacts?

Element Y has second valence shell,and it can form a stable compound with element X_{11. }If the formula of the compound is X_2Y ,what is the atomic number of Y ?

What volume of 1 M NaOH (in ml) will be required to react completely with 100g of oleum which is 109% labelled?

Arrange the following sresonating structures in decreasing order of stability:

Which statement is true for a metal

which is more basic pyridine or piperidine

Which will make basic buffer ?

There is no S to S bond in

A group 15 element, which is a metal and forms a hydride with strongest reducing power among group 15 hydrides. The element is:

4g of a mixture of Na2CO3 and NaHCO3 on heating liberates 448 mL of CO2 at STP. The percentage of Na2CO3 in the mixture is?

26. Give the stereochemical mechanism of chain opening acid catalysed reaction of epoxide.

47. A 0.004 M solution of Na2SO4 is isotonic with a 0.01M solution of glucose at same temperature. The apparent degree of dissociation ofNa2SO4 is. 1. 25% 2. 50% 3. 75% 4. 85%

all the four sigma bond in perchlorate io are sp3-sp3 or sp2-sp

An organic compound (C3H9N)(A) when treated with nitrous acid, gave an alcohol and N2 gas was evolved. (A) on warming with CHCl3 and caustic potash gave (C), which on reduction gave isopropylmethylamine. Predict the structure of (A).

The compound when heated with CaO doesn't form a cyclic structure Succinic acid Malonic acid Malic acid Glutaric acid Give mechanism for cyclic structure in other three