46295 + Interview Questions in Chemistry

1.	One gram of charcoal adsorbs 100 mL of 0.5 M CH3COOH to form a mono-layer and thereby the molarity of acetic acid is reduced to 0.49 M. Calculate the surface area of the charcoal adsorbed by each molecule of acetic acid. Surface area of charcoal =3.01×102 m2/gm.
Answer» One gram of charcoal adsorbs $100 m L$ of $0.5 M C H_{3} C O O H$ to form a mono-layer and thereby the molarity of acetic acid is reduced to $0.49 M$ . Calculate the surface area of the charcoal adsorbed by each molecule of acetic acid. Surface area of charcoal $= 3.01 \times 10^{2} m^{2} / g m$ .

Discussion

2.	In interstitial defect, since constituent particles occupy interstitial site then why there is an increase in density?
Answer» In interstitial defect, since constituent particles occupy interstitial site then why there is an increase in density?

Discussion

3.	Gypsum is added in the Final stages of preparation of cement . Why ?
Answer» Gypsum is added in the Final stages of preparation of cement . Why ?

Discussion

4.	Why energy of an electron is -ve in an atom??
Answer» Why energy of an electron is -ve in an atom??

Discussion

5.	Which of the following molecule(s) are likely to have highest degrees of freedom?
Answer» Which of the following molecule(s) are likely to have highest degrees of freedom?

Discussion

6.	In Kjeldahl’s method for the estimation of nitrogen present in a soil sample, the ammonia evolved from 0.75 g of sample neutralized 10 mL of 1 M H2SO4. The percentage of nitrogen in the soil is:
Answer» In Kjeldahl’s method for the estimation of nitrogen present in a soil sample, the ammonia evolved from $0.75 g$ of sample neutralized $10 mL$ of $1 M H_{2} S O_{4}$ . The percentage of nitrogen in the soil is:

Discussion

7.	the ionic radii of X+ and Y - ions are 146 and 216 picometre respectively the probable type of structures shown by it is a) caesium chloride type b) rocksalt type C) zinc blende type D CaF2 type
Answer» the ionic radii of X+ and Y - ions are 146 and 216 picometre respectively the probable type of structures shown by it is a) caesium chloride type b) rocksalt type C) zinc blende type D CaF2 type

7.

the ionic radii of X+ and Y - ions are 146 and 216 picometre respectively the probable type of structures shown by it is a) caesium chloride type b) rocksalt type C) zinc blende type D CaF2 type

Answer»

the ionic radii of X+ and Y - ions are 146 and 216 picometre respectively the probable type of structures shown by it is

a) caesium chloride type

b) rocksalt type

C) zinc blende type

D CaF2 type

Discussion

8.	Freons are used as:
Answer» Freons are used as:

Discussion

9.	Oxygen can be obtained from bleaching powder by:
Answer» Oxygen can be obtained from bleaching powder by:

Discussion

10.	Which of the following orbitals has one angular node and one radial node?
Answer» Which of the following orbitals has one angular node and one radial node?

Discussion

11.	In mental work one advantage of adhesive-bonding over spot-welding is that the contact, and hence the bonding, is effected continuously over a broad surface instead of a series of a regularly spaced points with no bonding in between.
Answer» In mental work one advantage of adhesive-bonding over spot-welding is that the contact, and hence the bonding, is effected continuously over a broad surface instead of a series of a regularly spaced points with no bonding in between.

Discussion

12.	H2O2 can be used as:
Answer» H₂O₂can be used as:

Discussion

13.	The vapour pressure of pure benzene C6H6 at 50∘C is 268 torr. How many moles on non-volatile solute per mole of benzene is required to prepare a solution of benzene having a vapour pressure of 167 torr at 50∘C?
Answer» The vapour pressure of pure benzene $C_{6} H_{6}$ at $50^{\circ} C$ is 268 torr. How many moles on non-volatile solute per mole of benzene is required to prepare a solution of benzene having a vapour pressure of 167 torr at $50^{\circ} C$ ?

Discussion

14.	Compound C8H9Cl (A) on treatment with KCN followed by hydrolysis gives C9H10O2 (B). Ammonium salt of (B) on dry distillation gives (C), which reacts with alkaline solution of bromine to give C8H11N (D). Another compound (E), is obtained by the action of nitrous acid on (D) or by the action of aqueous potash on (A). (E) on oxidation gives C8H6O4 (F) which gives an anhydride C8H4O3 (G) on heating. If x is the DOE of (G) and y is the DOE of (F), then x-y=
Answer» Compound $C_{8} H_{9} C l$ (A) on treatment with $K C N$ followed by hydrolysis gives $C_{9} H_{10} O_{2}$ (B). Ammonium salt of (B) on dry distillation gives (C), which reacts with alkaline solution of bromine to give $C_{8} H_{11} N$ (D). Another compound (E), is obtained by the action of nitrous acid on (D) or by the action of aqueous potash on (A). (E) on oxidation gives $C_{8} H_{6} O_{4}$ (F) which gives an anhydride $C_{8} H_{4} O_{3}$ (G) on heating. If x is the DOE of (G) and y is the DOE of (F), then x-y=

Discussion

15.	Na metal cannot be stored under
Answer» Na metal cannot be stored under

Discussion

16.	The dissociation constant of HA and HB are 6×10−4 and 2.0×10−4 respectively. What is the pH of a solution which is a mixture of 0.5 M of HA and 0.5 M of HB? (Take log2= 0.30).
Answer» The dissociation constant of $H A$ and $H B$ are $6 \times 10^{- 4}$ and $2.0 \times 10^{- 4}$ respectively. What is the pH of a solution which is a mixture of 0.5 M of $H A$ and 0.5 M of $H B$ ? (Take log2= 0.30).

Discussion

17.	The number of sigma and pi-bonds in tetracyanoethene are
Answer» The number of sigma and pi-bonds in tetracyanoethene are

Discussion

18.	Glycine and alanine are different with respect to one substituent on the α-carbon. What are the other common substituent groups ?
Answer» Glycine and alanine are different with respect to one substituent on the $α$ -carbon. What are the other common substituent groups ?

Discussion

19.	Which analgesics are called opiates ?
Answer» Which analgesics are called opiates ?

Discussion

20.	A unknown gas 'A' decolourises bromine in CCl4 and forms a precipitate with ammoniacal silver nitrate. The gas 'A' is:
Answer» A unknown gas 'A' decolourises bromine in $C C l_{4}$ and forms a precipitate with ammoniacal silver nitrate. The gas 'A' is:

Discussion

21.	CCl4 on treatment with SbF3 in presence of SbCl5 as a catalyst gives;
Answer» CCl₄ on treatment with SbF₃ in presence of SbCl₅ as a catalyst gives;

Discussion

22.	An aqueous solution of a mixture of two inorganic salts, when treated with dilute HCl, gave a precipitate (P) and a filtrate (Q). The precipitate P was found to dissolve in hot water. The filtrate (Q) remained unchanged, when treated with H2S in a dilute mineral acid medium. However, it gave a precipitate with H2S in an ammonical medium. The precipitate R gave a coloured solution (S), when treated with H2O2 in an aqueous NaOH medium. The precipitate P contains:
Answer» An aqueous solution of a mixture of two inorganic salts, when treated with dilute HCl, gave a precipitate (P) and a filtrate (Q). The precipitate P was found to dissolve in hot water. The filtrate (Q) remained unchanged, when treated with $H_{2}$ S in a dilute mineral acid medium. However, it gave a precipitate with $H_{2}$ S in an ammonical medium. The precipitate R gave a coloured solution (S), when treated with $H_{2} O_{2}$ in an aqueous NaOH medium. The precipitate P contains:

Discussion

23.	The impossible overlap among the following is:
Answer» The impossible overlap among the following is:

Discussion

24.	In a capillary tube, water rises to a height of 4 cm. If the cross sectional area of the tube were one – fourth, water would have raised to a height of
Answer» In a capillary tube, water rises to a height of 4 cm. If the cross sectional area of the tube were one – fourth, water would have raised to a height of

Discussion

25.	Which species among the following has bond angle of 109.5o?
Answer» Which species among the following has bond angle of ${109.5}^{o}$ ?

Discussion

26.	Calculate the work done by the gas in the state diagram shown
Answer» Calculate the work done by the gas in the state diagram shown

26.

Calculate the work done by the gas in the state diagram shown

Answer»

Calculate the work done by the gas in the state diagram shown

Discussion

27.	Consider the following statements: At the present level of technology available in India, solar energy can be conveniently used to 1.supply hot water to residential buildings 2.supply water for minor irrigation projects 3.provide street lighting 4.electrify a cluster of villages and small towns
Answer» Consider the following statements: At the present level of technology available in India, solar energy can be conveniently used to 1.supply hot water to residential buildings 2.supply water for minor irrigation projects 3.provide street lighting 4.electrify a cluster of villages and small towns

27.

Consider the following statements: At the present level of technology available in India, solar energy can be conveniently used to 1.supply hot water to residential buildings 2.supply water for minor irrigation projects 3.provide street lighting 4.electrify a cluster of villages and small towns

Answer»

Consider the following statements: At the present level of technology available in India, solar energy can be conveniently used to

1.supply hot water to residential buildings

2.supply water for minor irrigation projects

3.provide street lighting

4.electrify a cluster of villages and small towns

Discussion

28.	Give reasons for the following : (i) (CH3)3P=O exists but (CH3)3N=O does not. (ii) Oxygen has less electron gain enthalpy with negative sign than sulphur. (iii) H3PO2 is a stronger reducing agent than H3PO3.
Answer» Give reasons for the following : (i) $(C H_{3})_{3} P = O$ exists but $(C H_{3})_{3} N = O$ does not. (ii) Oxygen has less electron gain enthalpy with negative sign than sulphur. (iii) $H_{3} P O_{2}$ is a stronger reducing agent than $H_{3} P O_{3}$ .

Discussion

29.	Position isomerism is a part of:
Answer» Position isomerism is a part of:

Discussion

30.	The composition of a sample of Wustite is Fe0.93O1.0. What percentage of iron is present in the form of Fe(III) is
Answer» The composition of a sample of Wustite is Fe0.93O1.0. What percentage of iron is present in the form of Fe(III) is

Discussion

31.	(CH3)3COH on heating with copper at 573K gives:
Answer» $(C H_{3})_{3} C O H$ on heating with copper at 573K gives:

Discussion

32.	Calculate the amount of polythene formed from 20kg of Calcium Carbide from the reaction given below
Answer» Calculate the amount of polythene formed from 20kg of Calcium Carbide from the reaction given below

32.

Calculate the amount of polythene formed from 20kg of Calcium Carbide from the reaction given below

Answer»

Calculate the amount of polythene formed from 20kg of Calcium Carbide from the reaction given below

Discussion

33.	Ionic product of water at 310 K is 2.7×10−14. What is the pH of neutral water at this temperature?
Answer» Ionic product of water at 310 K is $2.7 \times 10^{- 14}$ . What is the pH of neutral water at this temperature?

Discussion

34.	Correct IUPAC name of compound is:
Answer» Correct IUPAC name of compound is:

Discussion

35.	Potential in space is given by V = axy. Then electric field in space is best represented by
Answer» Potential in space is given by V = axy. Then electric field in space is best represented by

Discussion

36.	A black body is at a temperature of 2880 K. The energy of radiation emitted by this object with wave length between 250 nm to 255 nm is U1, between 500 nm to 505 nm is U2and between 1500 nm to 1505 nm is U3. Then for this situation mark the correct statement
Answer» A black body is at a temperature of 2880 K. The energy of radiation emitted by this object with wave length between 250 nm to 255 nm is U₁, between 500 nm to 505 nm is U₂and between 1500 nm to 1505 nm is U₃. Then for this situation mark the correct statement

Discussion

37.	The enthalpy of hydrogenation of cyclohexene is −119.5 kJ/mol. What is the enthalpy of benzene, if its resonance energy is −150.4 kJ/mol?
Answer» The enthalpy of hydrogenation of cyclohexene is $- 119.5 k J / m o l$ . What is the enthalpy of benzene, if its resonance energy is $- 150.4 k J / m o l$ ?

Discussion

38.	The correct order of atomic radii in group 13 elements is
Answer» The correct order of atomic radii in group 13 elements is

Discussion

39.	H2,Li2,B2 each has bond order equal to 1, the order of their stability is :
Answer» $H_{2}, L i_{2}, B_{2}$ each has bond order equal to 1, the order of their stability is :

Discussion

40.	The product(s) of the following reaction sequence is/are:
Answer» The product(s) of the following reaction sequence is/are:

Discussion

41.	The molecular weights of two ideal gases A and B are respectively 100 g/mol and 200 g/mol. One gram of A occupies V litre of volume at STP. What is the volume (in litre) occupied by one gram of B at STP?
Answer» The molecular weights of two ideal gases $A$ and $B$ are respectively $100 g / m o l$ and $200 g / m o l$ . One gram of $A$ occupies $V$ litre of volume at STP. What is the volume (in litre) occupied by one gram of $B$ at STP?

Discussion

42.	One cationic complex has two isomers A and B. Each has one Co3+, five NH3, one Br−, and one SO2−4 stoi-chiometrically. A gives white ppt with BaCl2 whle B give yellow ppt with AgNO3. B can be:
Answer» One cationic complex has two isomers A and B. Each has one $C o^{3 +}$ , five $N H_{3}$ , one $B r^{-}$ , and one $S O_{4}^{2 -}$ stoi-chiometrically. A gives white ppt with $B a C l_{2}$ whle B give yellow ppt with $A g N O_{3}$ . B can be:

Discussion

43.	Which of the following options has the correct combination considering List-I and List-II?
Answer» Which of the following options has the correct combination considering List-I and List-II?

Discussion

44.	When XeF4 is treated with water, which of the following is not the correct product?
Answer» When $X e F_{4}$ is treated with water, which of the following is not the correct product?

Discussion

45.	What is the oxidation no. Of iron in Na4[Fe(Cn)6] pls send the solution with it Thank you
Answer» What is the oxidation no. Of iron in Na4[Fe(Cn)6] pls send the solution with it Thank you

Discussion

46.	What is the use of radius ratios?
Answer» What is the use of radius ratios?

Discussion

47.	250 ml of N maintained at 720 mm pressure and 380 ml of oxygen maintained at 650mm pressure are put together in one litre flask. Is the temperature is kept constant what will be there final pressure of the mixture.
Answer» 250 ml of N maintained at 720 mm pressure and 380 ml of oxygen maintained at 650mm pressure are put together in one litre flask. Is the temperature is kept constant what will be there final pressure of the mixture.

Discussion

48.	Which of the following has been arranged in increasing order of size of the hybrid orbitals ?
Answer» Which of the following has been arranged in increasing order of size of the hybrid orbitals ?

Discussion

49.	In which molecule is van der Waals force most likely to be important in determining the melting point and the boiling point?
Answer» In which molecule is van der Waals force most likely to be important in determining the melting point and the boiling point?

Discussion

50.	Which can't OF4 not exist theocratically?
Answer» Which can't OF4 not exist theocratically?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

One gram of charcoal adsorbs 100 mL of 0.5 M CH3COOH to form a mono-layer and thereby the molarity of acetic acid is reduced to 0.49 M. Calculate the surface area of the charcoal adsorbed by each molecule of acetic acid. Surface area of charcoal =3.01×102 m2/gm.

In interstitial defect, since constituent particles occupy interstitial site then why there is an increase in density?

Gypsum is added in the Final stages of preparation of cement . Why ?

Why energy of an electron is -ve in an atom??

Which of the following molecule(s) are likely to have highest degrees of freedom?

In Kjeldahl’s method for the estimation of nitrogen present in a soil sample, the ammonia evolved from 0.75 g of sample neutralized 10 mL of 1 M H2SO4. The percentage of nitrogen in the soil is:

the ionic radii of X+ and Y - ions are 146 and 216 picometre respectively the probable type of structures shown by it is a) caesium chloride type b) rocksalt type C) zinc blende type D CaF2 type

Freons are used as:

Oxygen can be obtained from bleaching powder by:

Which of the following orbitals has one angular node and one radial node?

In mental work one advantage of adhesive-bonding over spot-welding is that the contact, and hence the bonding, is effected continuously over a broad surface instead of a series of a regularly spaced points with no bonding in between.

H2O2 can be used as:

The vapour pressure of pure benzene C6H6 at 50∘C is 268 torr. How many moles on non-volatile solute per mole of benzene is required to prepare a solution of benzene having a vapour pressure of 167 torr at 50∘C?

Na metal cannot be stored under

The dissociation constant of HA and HB are 6×10−4 and 2.0×10−4 respectively. What is the pH of a solution which is a mixture of 0.5 M of HA and 0.5 M of HB? (Take log2= 0.30).

The number of sigma and pi-bonds in tetracyanoethene are

Glycine and alanine are different with respect to one substituent on the α-carbon. What are the other common substituent groups ?

Which analgesics are called opiates ?

A unknown gas 'A' decolourises bromine in CCl4 and forms a precipitate with ammoniacal silver nitrate. The gas 'A' is:

CCl4 on treatment with SbF3 in presence of SbCl5 as a catalyst gives;

The impossible overlap among the following is:

In a capillary tube, water rises to a height of 4 cm. If the cross sectional area of the tube were one – fourth, water would have raised to a height of

Which species among the following has bond angle of 109.5o?

Calculate the work done by the gas in the state diagram shown

Consider the following statements: At the present level of technology available in India, solar energy can be conveniently used to 1.supply hot water to residential buildings 2.supply water for minor irrigation projects 3.provide street lighting 4.electrify a cluster of villages and small towns

Give reasons for the following : (i) (CH3)3P=O exists but (CH3)3N=O does not. (ii) Oxygen has less electron gain enthalpy with negative sign than sulphur. (iii) H3PO2 is a stronger reducing agent than H3PO3.

Position isomerism is a part of:

The composition of a sample of Wustite is Fe0.93O1.0. What percentage of iron is present in the form of Fe(III) is

(CH3)3COH on heating with copper at 573K gives:

Calculate the amount of polythene formed from 20kg of Calcium Carbide from the reaction given below

Ionic product of water at 310 K is 2.7×10−14. What is the pH of neutral water at this temperature?

Correct IUPAC name of compound is:

Potential in space is given by V = axy. Then electric field in space is best represented by

A black body is at a temperature of 2880 K. The energy of radiation emitted by this object with wave length between 250 nm to 255 nm is U1, between 500 nm to 505 nm is U2and between 1500 nm to 1505 nm is U3. Then for this situation mark the correct statement

The enthalpy of hydrogenation of cyclohexene is −119.5 kJ/mol. What is the enthalpy of benzene, if its resonance energy is −150.4 kJ/mol?

The correct order of atomic radii in group 13 elements is

H2,Li2,B2 each has bond order equal to 1, the order of their stability is :

The product(s) of the following reaction sequence is/are:

The molecular weights of two ideal gases A and B are respectively 100 g/mol and 200 g/mol. One gram of A occupies V litre of volume at STP. What is the volume (in litre) occupied by one gram of B at STP?

One cationic complex has two isomers A and B. Each has one Co3+, five NH3, one Br−, and one SO2−4 stoi-chiometrically. A gives white ppt with BaCl2 whle B give yellow ppt with AgNO3. B can be:

Which of the following options has the correct combination considering List-I and List-II?

When XeF4 is treated with water, which of the following is not the correct product?

What is the oxidation no. Of iron in Na4[Fe(Cn)6] pls send the solution with it Thank you

What is the use of radius ratios?

250 ml of N maintained at 720 mm pressure and 380 ml of oxygen maintained at 650mm pressure are put together in one litre flask. Is the temperature is kept constant what will be there final pressure of the mixture.

Which of the following has been arranged in increasing order of size of the hybrid orbitals ?

In which molecule is van der Waals force most likely to be important in determining the melting point and the boiling point?

Which can't OF4 not exist theocratically?