46295 + Interview Questions in Chemistry

1.	Why does the third period of the periodic table contain 8 elements?
Answer» Why does the third period of the periodic table contain 8 elements?

Discussion

2.	Which of the following are organic compounds?
Answer» Which of the following are organic compounds?

Discussion

3.	A solid is made of two elements P and Q. Atoms P are in ccp arrangement and atom Q occupy all octahedral voids and half of tetrahedral voids. The simplest formula of the compound is :-
Answer» A solid is made of two elements P and Q. Atoms P are in ccp arrangement and atom Q occupy all octahedral voids and half of tetrahedral voids. The simplest formula of the compound is :-

Discussion

4.	The amount of ice that will separate out on cooling a solution containing 50 g of Ethylene glycol in 200 g water to -9.3is (Kf=1.86 K/molal)
Answer» The amount of ice that will separate out on cooling a solution containing 50 g of Ethylene glycol in 200 g water to -9.3is (Kf=1.86 K/molal)

Discussion

5.	28. Correct statements about the compound given below. 1. The compound is optically active 2. The compound possesses cente of symmetry. 3. The compound possesses plane of symmetry. 4. The compound possesses axis of symmetry.
Answer» 28. Correct statements about the compound given below. 1. The compound is optically active 2. The compound possesses cente of symmetry. 3. The compound possesses plane of symmetry. 4. The compound possesses axis of symmetry.

Discussion

6.	2 gases Ch4 and Helium are allowed to move 300m.if methane covered 6 second find the time taken by Helium
Answer» 2 gases Ch4 and Helium are allowed to move 300m.if methane covered 6 second find the time taken by Helium

Discussion

7.	Why water is a weak field ligand while oxalate is a strong field ligand?
Answer» Why water is a weak field ligand while oxalate is a strong field ligand?

Discussion

8.	37. The strength of (10power-2)M Na2CO3 solution in term of molality will be (density of solution = 1.1 g/ml) (Molar mass of Na2CO3 = 106 g/mol)
Answer» 37. The strength of (10power-2)M Na2CO3 solution in term of molality will be (density of solution = 1.1 g/ml) (Molar mass of Na2CO3 = 106 g/mol)

Discussion

9.	47.The solubility of Sr(OH)2 is 19.23 g/L of solution. Calculate concentration of Sr and hydroxyl ion
Answer» 47.The solubility of Sr(OH)2 is 19.23 g/L of solution. Calculate concentration of Sr and hydroxyl ion

Discussion

10.	A sample of AgCl was treated with 500 mL of 1.5M Na2CO3 solution to give Ag2CO3. The remaining solution contained 0.0026 g of Cl− per litre. The solubility product of AgCl is if Ksp(Ag2CO3)=8.2×10−12
Answer» A sample of $A g C l$ was treated with $500 m L$ of $1.5 M$ $N a_{2} C O_{3}$ solution to give $A g_{2} C O_{3}$ . The remaining solution contained $0.0026 g$ of $C l^{-}$ per litre. The solubility product of $A g C l$ is if $K_{s p} (A g_{2} C O_{3}) = 8.2 \times 10^{- 12}$

Discussion

11.	What is the molality of NaOH in solution if 50 g of an aq. solution contains 4 g of NaOH?
Answer» What is the molality of NaOH in solution if 50 g of an aq. solution contains 4 g of NaOH?

Discussion

12.	Q 25/90 The strongest hydrogen bond among thefollowing is 1.F-H---F 2.O-H---N 3.N-H--O 4.F-H---O
Answer» Q 25/90 The strongest hydrogen bond among thefollowing is 1.F-H---F 2.O-H---N 3.N-H--O 4.F-H---O

Discussion

13.	20.0 g of a magnesium carbonate sample decomposes on heating to give carbon dioxide and 8.0g magnesium oxide. What will be the percentage purity of magnesium carbonate in the sample ? (At. Wt. : Mg = 24)
Answer» $20.0 g$ of a magnesium carbonate sample decomposes on heating to give carbon dioxide and $8.0 g$ magnesium oxide. What will be the percentage purity of magnesium carbonate in the sample ? (At. Wt. : $M g$ = 24)

Discussion

14.	IUPAC name of K(BF_4)
Answer» IUPAC name of K(BF_4)

Discussion

15.	Newman representation of staggered propane is:
Answer» Newman representation of staggered propane is:

Discussion

16.	Zinc oxide is reduced to zinc metal by heating with:
Answer» Zinc oxide is reduced to zinc metal by heating with:

Discussion

17.	In which of the following coordination entities the magnitude of Δo (CFSE in octahedral feild ) will be maximum? (Atomic number of Co=27)
Answer» In which of the following coordination entities the magnitude of $Δ_{o}$ (CFSE in octahedral feild ) will be maximum? (Atomic number of $C o = 27$ )

Discussion

18.	Identify the correct order of boiling points of the following compounds.1. CH3(CH2)2CH2OH2. CH3(CH2)2CHO3. CH3(CH2)2COOH
Answer» Identify the correct order of boiling points of the following compounds. 1. $C H_{3} (C H_{2})_{2} C H_{2} O H$ 2. $C H_{3} (C H_{2})_{2} C H O$ 3. $C H_{3} (C H_{2})_{2} C O O H$

Discussion

19.	Difference between △H and △U for the combustion of benzene at 300 K is
Answer» Difference between $△ H$ and $△ U$ for the combustion of benzene at $300 K$ is

Discussion

20.	What are the postulates of molecular orbital theory?
Answer» What are the postulates of molecular orbital theory?

Discussion

21.	Which of the following processes does not involve oxidation of iron ?
Answer» Which of the following processes does not involve oxidation of iron ?

Discussion

22.	For gaseous reaction, SO2+1/2 O2gives SO3 .If volume of SO2is 10L then what volume of O2is required ?
Answer» For gaseous reaction, SO2+1/2 O2gives SO3 .If volume of SO2is 10L then what volume of O2is required ?

Discussion

23.	For a reaction 2H2O2I−−−−−−−−−−→alkaline medium2H2O+O2 The proposed mechanism is given below: (1) H2O2+I−→H2O+IO−(slow) (2) H2O2+IO−→H2O+I−+O2(fast) (i) Write rate law for the reaction. (ii) Write the overall order of the reaction. (iii) Out of steps (1) and (2), which one is the rate determining step?
Answer» For a reaction $2 H_{2} O_{2} I^{-} - -------- \to alkaline medium 2 H_{2} O + O_{2}$ The proposed mechanism is given below: (1) $H_{2} O_{2} + I^{-} \to H_{2} O + I O^{-} (s l o w)$ (2) $H_{2} O_{2} + I O^{-} \to H_{2} O + I^{-} + O_{2} (f a s t)$ (i) Write rate law for the reaction. (ii) Write the overall order of the reaction. (iii) Out of steps (1) and (2), which one is the rate determining step?

Discussion

24.	31. Find the emf of the cell Zn(s)\|Zn+2 (0.01M)\|KCl saturated\|Zn+2 (1.0M)\|Zn (s).
Answer» 31. Find the emf of the cell Zn(s)\|Zn+2 (0.01M)\|KCl saturated\|Zn+2 (1.0M)\|Zn (s).

Discussion

25.	What is pair production?
Answer» What is pair production?

Discussion

26.	95.The solubility of a specific non-volatile salt is 4g in 100g of water at 25^° C. If 2.0g,4.06g and 6.0g of the salt added of 100g of water at 25^° C, in system X, Y and Z. The vapour pressure would be in the order: (1)XY>Z (3)Z>X=Y (4)X>Y=Z
Answer» 95.The solubility of a specific non-volatile salt is 4g in 100g of water at 25^° C. If 2.0g,4.06g and 6.0g of the salt added of 100g of water at 25^° C, in system X, Y and Z. The vapour pressure would be in the order: (1)XY>Z (3)Z>X=Y (4)X>Y=Z

Discussion

27.	Q1) What is the correct order ofacidic nature for LiH,NaH,KH
Answer» Q1) What is the correct order ofacidic nature for LiH,NaH,KH

Discussion

28.	A compound contains two types of atoms X and Y. It crystallizes in a cubic lattice with atoms X at the corners of the unit cell and atoms Y at the body centre. The simplest possible formula of this compound is
Answer» A compound contains two types of atoms X and Y. It crystallizes in a cubic lattice with atoms X at the corners of the unit cell and atoms Y at the body centre. The simplest possible formula of this compound is

Discussion

29.	21. A substance C_5H_{10} O does not reduce Fehling's solution , forms a phenylhydrazone shows the haloform reaction and can be converted into n-pentane by strong reduction. The structural formula of the original substance is
Answer» 21. A substance C_5H_{10} O does not reduce Fehling's solution , forms a phenylhydrazone shows the haloform reaction and can be converted into n-pentane by strong reduction. The structural formula of the original substance is

Discussion

30.	A mixture of 2 mole of CO and 1 mol of O2 is ignited. Correct relationship is (1)△ H=△ U (2)△ H >△ U (3)△ H
Answer» A mixture of 2 mole of CO and 1 mol of O2 is ignited. Correct relationship is (1)△ H=△ U (2)△ H >△ U (3)△ H

Discussion

31.	34. For [Ag (NH3)2]+ at 298K at 10 dissociation constant in Ag+&NH3 If E^° Ag+/Ag=0.8V so what is E^° value of half cell [Ag(NH3)2]+ +e.>Ag+ +2NH3 1)0.33V 2)0.33V 3)0.033V 4)0.033V
Answer» 34. For [Ag (NH3)2]+ at 298K at 10 dissociation constant in Ag+&NH3 If E^° Ag+/Ag=0.8V so what is E^° value of half cell [Ag(NH3)2]+ +e.>Ag+ +2NH3 1)0.33V 2)0.33V 3)0.033V 4)0.033V

Discussion

32.	At 25∘C, the degree of ionization of water was found to be 1.8×10−9. Calculate the ionic product of water at this temperature.
Answer» At $25^{\circ} C$ , the degree of ionization of water was found to be $1.8 \times 10^{- 9}$ . Calculate the ionic product of water at this temperature.

Discussion

33.	The density of 3M solution of Na2S2O3 is 1.25g/mol. Calculate the molality of Na+ and S2O3-. Also calculate mole fraction of of Na2S2O3
Answer» The density of 3M solution of Na2S2O3 is 1.25g/mol. Calculate the molality of Na+ and S2O3-. Also calculate mole fraction of of Na2S2O3

Discussion

34.	Atoms A OCCUPY CORNERS B OCCUPY FACE CENTRE C OCCUPY TETRAVOID D OCCUPY OCTAVOID IF THE ATOMS TOUCHING ONE OF THE BODY DIAGONAL ARE REMOVED THEN THE FORMULA OF COMPOUND IS?
Answer» Atoms A OCCUPY CORNERS B OCCUPY FACE CENTRE C OCCUPY TETRAVOID D OCCUPY OCTAVOID IF THE ATOMS TOUCHING ONE OF THE BODY DIAGONAL ARE REMOVED THEN THE FORMULA OF COMPOUND IS?

Discussion

35.	0. Volume of 0.2M Ba(OH), required to neutralise 25mlof 0.2M SO2CI2 solution TESO2CI2+2H2O_> H2SO+2HCI\rbrack(1) 100 ml(2) 75 ml(3) 40 ml(4) 50 ml
Answer» 0. Volume of 0.2M Ba(OH), required to neutralise 25mlof 0.2M SO2CI2 solution TESO2CI2+2H2O_> H2SO+2HCI\rbrack(1) 100 ml(2) 75 ml(3) 40 ml(4) 50 ml

Discussion

36.	Why the smaller size of ion has greater hyration energy
Answer» Why the smaller size of ion has greater hyration energy

Discussion

37.	Reaction A+3B forward and backward reaction 2C if initinal mole of A and B are 10 and 10 respectivly in a container of 2 litre degree of dissociation at equilibrium is 60% then find out the value of Kc.
Answer» Reaction A+3B forward and backward reaction 2C if initinal mole of A and B are 10 and 10 respectivly in a container of 2 litre degree of dissociation at equilibrium is 60% then find out the value of Kc.

Discussion

38.	Which is odd electron specie?(1) CO2(2) NO2(3) SO2(4) SiO2
Answer» Which is odd electron specie?(1) CO2(2) NO2(3) SO2(4) SiO2

Discussion

39.	40. One litre of CO_2 is passed through red hot cake. The volume becomes 1.4 litres at same temperature and pressure. The composition of products is?
Answer» 40. One litre of CO_2 is passed through red hot cake. The volume becomes 1.4 litres at same temperature and pressure. The composition of products is?

Discussion

40.	A bar of iron have lenght L and magnetic moment M. It is turn into a semicircle then calculate the new magnetic moment.
Answer» A bar of iron have lenght L and magnetic moment M. It is turn into a semicircle then calculate the new magnetic moment.

Discussion

41.	in the conversion of nitrobenzene to Aniline what is the n factor if weakly acidic and weakly alkaljne medium are condired respectivel
Answer» in the conversion of nitrobenzene to Aniline what is the n factor if weakly acidic and weakly alkaljne medium are condired respectivel

Discussion

42.	What will be the amount of heat evolved by burning 10L of methane under standard conditions?(Given heats of formation of CH4,CO2 and H2O are −76.2,−398.8 and −241.6 kJmol−1 respectively)
Answer» What will be the amount of heat evolved by burning $10 L$ of methane under standard conditions? (Given heats of formation of $C H_{4}, C O_{2} a n d H_{2} O a r e - 76.2, - 398.8 a n d - 241.6 k J m o l^{- 1}$ respectively)

Discussion

43.	A first order reaction is 50% completed in 1.26×10^14s. How much time would it take for 100% completion?
Answer» A first order reaction is 50% completed in 1.26×10^14s. How much time would it take for 100% completion?

Discussion

44.	Consider the following balanced redox reaction :aFe2+(aq)+brCr2O2−7(aq)→ xFe3+(aq)+yCr3+(aq)+yCr3+(aq)+zH2O(l)The value of (a)(y)(b)(x)
Answer» Consider the following balanced redox reaction : $a F e^{2 +} (a q) + b r C r_{2} O_{7}^{2 -} (a q) \to x F e^{3 +} (a q) + y C r^{3 +} (a q) + y C r^{3 +} (a q) + z H_{2} O (l)$ The value of $\frac{(a) (y)}{(b) (x)}$

Discussion

45.	What base is responsible for hot spots for spontaneous point mutations 1)5-bromouracil 2)5-methylcytosine 3)guanine 4) adenine
Answer» What base is responsible for hot spots for spontaneous point mutations 1)5-bromouracil 2)5-methylcytosine 3)guanine 4) adenine

Discussion

46.	For CO, isotherm is of the type as shown.Near the pointA , compressibility factor Z is
Answer» For CO, isotherm is of the type as shown.Near the pointA , compressibility factor Z is

46.

For CO, isotherm is of the type as shown.Near the pointA , compressibility factor Z is

Answer»

For CO, isotherm is of the type as shown.Near the pointA , compressibility factor Z is

Discussion

47.	The average oxidation state of Sulphur in Sodium Thiosulphate is +_____. ___
Answer» The average oxidation state of Sulphur in Sodium Thiosulphate is +_____. ___

Discussion

48.	Which of the following is a polyester fabric?
Answer» Which of the following is a polyester fabric?

Discussion

49.	5. 1.6 m lamba men tin meter hight two diwar ke mid mai s†an d hi men duara usake piche present diwar ki pu4i hight dekane ke liye uske samuk diwar per stit plane mirrior min hight(1) 0.8 m(3) 1.5 m(2) 1 m(4) 2.3 m
Answer» 5. 1.6 m lamba men tin meter hight two diwar ke mid mai s†an d hi men duara usake piche present diwar ki pu4i hight dekane ke liye uske samuk diwar per stit plane mirrior min hight(1) 0.8 m(3) 1.5 m(2) 1 m(4) 2.3 m

Discussion

50.	For irreversible expansion of an ideal gas under isothermal condition, the correct option is :
Answer» For irreversible expansion of an ideal gas under isothermal condition, the correct option is :

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Why does the third period of the periodic table contain 8 elements?

Which of the following are organic compounds?

A solid is made of two elements P and Q. Atoms P are in ccp arrangement and atom Q occupy all octahedral voids and half of tetrahedral voids. The simplest formula of the compound is :-

The amount of ice that will separate out on cooling a solution containing 50 g of Ethylene glycol in 200 g water to -9.3is (Kf=1.86 K/molal)

28. Correct statements about the compound given below. 1. The compound is optically active 2. The compound possesses cente of symmetry. 3. The compound possesses plane of symmetry. 4. The compound possesses axis of symmetry.

2 gases Ch4 and Helium are allowed to move 300m.if methane covered 6 second find the time taken by Helium

Why water is a weak field ligand while oxalate is a strong field ligand?

37. The strength of (10power-2)M Na2CO3 solution in term of molality will be (density of solution = 1.1 g/ml) (Molar mass of Na2CO3 = 106 g/mol)

47.The solubility of Sr(OH)2 is 19.23 g/L of solution. Calculate concentration of Sr and hydroxyl ion

A sample of AgCl was treated with 500 mL of 1.5M Na2CO3 solution to give Ag2CO3. The remaining solution contained 0.0026 g of Cl− per litre. The solubility product of AgCl is if Ksp(Ag2CO3)=8.2×10−12

What is the molality of NaOH in solution if 50 g of an aq. solution contains 4 g of NaOH?

Q 25/90 The strongest hydrogen bond among thefollowing is 1.F-H---F 2.O-H---N 3.N-H--O 4.F-H---O

20.0 g of a magnesium carbonate sample decomposes on heating to give carbon dioxide and 8.0g magnesium oxide. What will be the percentage purity of magnesium carbonate in the sample ? (At. Wt. : Mg = 24)

IUPAC name of K(BF_4)

Newman representation of staggered propane is:

Zinc oxide is reduced to zinc metal by heating with:

In which of the following coordination entities the magnitude of Δo (CFSE in octahedral feild ) will be maximum? (Atomic number of Co=27)

Identify the correct order of boiling points of the following compounds.1. CH3(CH2)2CH2OH2. CH3(CH2)2CHO3. CH3(CH2)2COOH

Difference between △H and △U for the combustion of benzene at 300 K is

What are the postulates of molecular orbital theory?

Which of the following processes does not involve oxidation of iron ?

For gaseous reaction, SO2+1/2 O2gives SO3 .If volume of SO2is 10L then what volume of O2is required ?

31. Find the emf of the cell Zn(s)|Zn+2 (0.01M)|KCl saturated|Zn+2 (1.0M)|Zn (s).

What is pair production?

95.The solubility of a specific non-volatile salt is 4g in 100g of water at 25^° C. If 2.0g,4.06g and 6.0g of the salt added of 100g of water at 25^° C, in system X, Y and Z. The vapour pressure would be in the order: (1)XY>Z (3)Z>X=Y (4)X>Y=Z

Q1) What is the correct order ofacidic nature for LiH,NaH,KH

A compound contains two types of atoms X and Y. It crystallizes in a cubic lattice with atoms X at the corners of the unit cell and atoms Y at the body centre. The simplest possible formula of this compound is

21. A substance C_5H_{10} O does not reduce Fehling's solution , forms a phenylhydrazone shows the haloform reaction and can be converted into n-pentane by strong reduction. The structural formula of the original substance is

A mixture of 2 mole of CO and 1 mol of O2 is ignited. Correct relationship is (1)△ H=△ U (2)△ H >△ U (3)△ H

34. For [Ag (NH3)2]+ at 298K at 10 dissociation constant in Ag+&NH3 If E^° Ag+/Ag=0.8V so what is E^° value of half cell [Ag(NH3)2]+ +e.>Ag+ +2NH3 1)0.33V 2)0.33V 3)0.033V 4)0.033V

At 25∘C, the degree of ionization of water was found to be 1.8×10−9. Calculate the ionic product of water at this temperature.

The density of 3M solution of Na2S2O3 is 1.25g/mol. Calculate the molality of Na+ and S2O3-. Also calculate mole fraction of of Na2S2O3

Atoms A OCCUPY CORNERS B OCCUPY FACE CENTRE C OCCUPY TETRAVOID D OCCUPY OCTAVOID IF THE ATOMS TOUCHING ONE OF THE BODY DIAGONAL ARE REMOVED THEN THE FORMULA OF COMPOUND IS?

0. Volume of 0.2M Ba(OH), required to neutralise 25mlof 0.2M SO2CI2 solution TESO2CI2+2H2O_> H2SO+2HCI\rbrack(1) 100 ml(2) 75 ml(3) 40 ml(4) 50 ml

Why the smaller size of ion has greater hyration energy

Reaction A+3B forward and backward reaction 2C if initinal mole of A and B are 10 and 10 respectivly in a container of 2 litre degree of dissociation at equilibrium is 60% then find out the value of Kc.

Which is odd electron specie?(1) CO2(2) NO2(3) SO2(4) SiO2

40. One litre of CO_2 is passed through red hot cake. The volume becomes 1.4 litres at same temperature and pressure. The composition of products is?

A bar of iron have lenght L and magnetic moment M. It is turn into a semicircle then calculate the new magnetic moment.

in the conversion of nitrobenzene to Aniline what is the n factor if weakly acidic and weakly alkaljne medium are condired respectivel

What will be the amount of heat evolved by burning 10L of methane under standard conditions?(Given heats of formation of CH4,CO2 and H2O are −76.2,−398.8 and −241.6 kJmol−1 respectively)

A first order reaction is 50% completed in 1.26×10^14s. How much time would it take for 100% completion?

Consider the following balanced redox reaction :aFe2+(aq)+brCr2O2−7(aq)→ xFe3+(aq)+yCr3+(aq)+yCr3+(aq)+zH2O(l)The value of (a)(y)(b)(x)​​​​​​​

What base is responsible for hot spots for spontaneous point mutations 1)5-bromouracil 2)5-methylcytosine 3)guanine 4) adenine

For CO, isotherm is of the type as shown.Near the pointA , compressibility factor Z is

The average oxidation state of Sulphur in Sodium Thiosulphate is +_____. ___

Which of the following is a polyester fabric?

5. 1.6 m lamba men tin meter hight two diwar ke mid mai s†an d hi men duara usake piche present diwar ki pu4i hight dekane ke liye uske samuk diwar per stit plane mirrior min hight(1) 0.8 m(3) 1.5 m(2) 1 m(4) 2.3 m

For irreversible expansion of an ideal gas under isothermal condition, the correct option is :

Consider the following balanced redox reaction :aFe2+(aq)+brCr2O2−7(aq)→ xFe3+(aq)+yCr3+(aq)+yCr3+(aq)+zH2O(l)The value of (a)(y)(b)(x)

The average oxidation state of Sulphur in Sodium Thiosulphate is +___. _