46295 + Interview Questions in Chemistry

1.	20. Sodium forms body centred cubic crystals. What is the atomic radius of sodium if the length of the side of unit cell of sodium is 429.56 pm? 1) 170 pm 2) 186 pm 3) 220 pm 4) 160 pm
Answer» 20. Sodium forms body centred cubic crystals. What is the atomic radius of sodium if the length of the side of unit cell of sodium is 429.56 pm? 1) 170 pm 2) 186 pm 3) 220 pm 4) 160 pm

Discussion

2.	maximum number of orbitals in p shell is a.3 b.6 c.18. d.36
Answer» maximum number of orbitals in p shell is a.3 b.6 c.18. d.36

Discussion

3.	Which of the following compound has the greater enol content?
Answer» Which of the following compound has the greater enol content?

Discussion

4.	Concentrated aqueous sulphuric acid os 98% H2SO4 by mass and has a density of 1.80gm/L . Volume of acid required to make 1 litre of 0.1 M H2SO4 solution is 1)16.65mL 2)22.20mL 3)5.55mL 4)11.10
Answer» Concentrated aqueous sulphuric acid os 98% H2SO4 by mass and has a density of 1.80gm/L . Volume of acid required to make 1 litre of 0.1 M H2SO4 solution is 1)16.65mL 2)22.20mL 3)5.55mL 4)11.10

Discussion

5.	99.What is the amount of CaCl2 (molar mass = 111 g mol−1) which must be added to 500 g of water to lower its freezing point by 2 K, assuming CaCl2 is completely dissociated
Answer» 99.What is the amount of CaCl2 (molar mass = 111 g mol−1) which must be added to 500 g of water to lower its freezing point by 2 K, assuming CaCl2 is completely dissociated

Discussion

6.	For LED's to emit light in the visible region of electromagnetic light, it should have the energy band gap in the range of
Answer» For LED's to emit light in the visible region of electromagnetic light, it should have the energy band gap in the range of

Discussion

7.	Here A, B, X & Y are
Answer» Here A, B, X & Y are

7.

Here A, B, X & Y are

Answer»

Here A, B, X & Y are

Discussion

8.	What is the Schrodinger's equation?
Answer» What is the Schrodinger's equation?

Discussion

9.	Assertion and Reason In the following questions a statement of assertion (A) followed by a statement reason (R) is given. Choose the correct answer out of the following choice.. (a) Assertion and reason both are correct statements but reason does not explain assertion. (b) Assertion and reason both are correct and reason explains asssWon. (c) Both assertion and reason are Wrong statements. (d) Assertion is correct statement reason is wrong statement. (e) Assertion is wrong statement reason is correct statement. Assertion (A) Transparent soaps are made by dissolving soaps in ethanol. Reason (R) Ethanol makes things invisible.
Answer» Assertion and Reason In the following questions a statement of assertion (A) followed by a statement reason (R) is given. Choose the correct answer out of the following choice.. (a) Assertion and reason both are correct statements but reason does not explain assertion. (b) Assertion and reason both are correct and reason explains asssWon. (c) Both assertion and reason are Wrong statements. (d) Assertion is correct statement reason is wrong statement. (e) Assertion is wrong statement reason is correct statement. Assertion (A) Transparent soaps are made by dissolving soaps in ethanol. Reason (R) Ethanol makes things invisible.

9.

Assertion and Reason In the following questions a statement of assertion (A) followed by a statement reason (R) is given. Choose the correct answer out of the following choice.. (a) Assertion and reason both are correct statements but reason does not explain assertion. (b) Assertion and reason both are correct and reason explains asssWon. (c) Both assertion and reason are Wrong statements. (d) Assertion is correct statement reason is wrong statement. (e) Assertion is wrong statement reason is correct statement. Assertion (A) Transparent soaps are made by dissolving soaps in ethanol. Reason (R) Ethanol makes things invisible.

Answer»

Assertion and Reason
In the following questions a statement of assertion (A) followed by a statement reason (R) is given. Choose the correct answer out of the following choice..
(a) Assertion and reason both are correct statements but reason does not explain assertion.
(b) Assertion and reason both are correct and reason explains asssWon.
(c) Both assertion and reason are Wrong statements.
(d) Assertion is correct statement reason is wrong statement.
(e) Assertion is wrong statement reason is correct statement.

Assertion (A) Transparent soaps are made by dissolving soaps in ethanol.
Reason (R) Ethanol makes things invisible.

Discussion

10.	The role of a catalyst is to change ...... . (a) Gibbs energy of reaction (b) enthalpy of reaction (c) activation energy of reaction (d) equilibrium constant
Answer» The role of a catalyst is to change ...... . (a) Gibbs energy of reaction (b) enthalpy of reaction (c) activation energy of reaction (d) equilibrium constant

Discussion

11.	A gaseous compound of molecular mass 82.1 dissociates on heating to 400K as : X2Y4(g)→X2(g)+2Y2(g). The density of the equilibrium mixture at a pressure of 1 atm and temperature of 400K is 2.0g L−1. The compound dissociates to the extent of :
Answer» A gaseous compound of molecular mass 82.1 dissociates on heating to 400K as : $X_{2} Y_{4 (g)} \to X_{2 (g)} + 2 Y_{2 (g)}$ . The density of the equilibrium mixture at a pressure of 1 atm and temperature of 400K is $2.0 g L^{- 1}$ . The compound dissociates to the extent of :

Discussion

12.	Are all changes reversible? Justify your answer Give the classification of changes on the basis of the reversibility nature of the substances.
Answer» Are all changes reversible? Justify your answer Give the classification of changes on the basis of the reversibility nature of the substances.

Discussion

13.	Calculate the electric flux through a curved surface area of cone.
Answer» Calculate the electric flux through a curved surface area of cone.

Discussion

14.	The bond dissociation energies of X2,Y2andX Y are in the ratio of 1:0.5:1.DeltaHfortheformationofXYis-200kJmol^-1.thebonddissociationenergyofX2willbe(1)200kJmole^-1(2)800kJmole^-1(3)100kJmole^-1(4)400kJmole^-1
Answer» The bond dissociation energies of X2,Y2andX Y are in the ratio of 1:0.5:1.DeltaHfortheformationofXYis-200kJmol^-1.thebonddissociationenergyofX2willbe(1)200kJmole^-1(2)800kJmole^-1(3)100kJmole^-1(4)400kJmole^-1

Discussion

15.	For the above reaction, addition of LiAlH4 in dry ether takes place at low temperature (−10 oC). What would be the product (B)?
Answer» For the above reaction, addition of $L i A l H_{4}$ in dry ether takes place at low temperature $(- 10^{o} C)$ . What would be the product (B)?

Discussion

16.	White phosphorus burns in a limited supply of air to form a soft white solid. This solid is Phosphorus __.
Answer» White phosphorus burns in a limited supply of air to form a soft white solid. This solid is Phosphorus __.

Discussion

17.	For complete absorption, which of the following is true?a→ Absorptive powerr→ Reflective power
Answer» For complete absorption, which of the following is true? $a \to$ Absorptive power $r \to$ Reflective power

Discussion

18.	Molarity of NAOH in 200 mL of an aqueous solutionof it is 1M, find the change in molarity if 2g ofNAOH is added to it.(1) 1.25 M2) 0.25 M(3) 0.50 M(4) 0.75 M
Answer» Molarity of NAOH in 200 mL of an aqueous solutionof it is 1M, find the change in molarity if 2g ofNAOH is added to it.(1) 1.25 M2) 0.25 M(3) 0.50 M(4) 0.75 M

Discussion

19.	In a Young's double slit experiment, the separation between the slits is 0.15 mm. In the experiment, a source of light of wavelength 589 nm is used, and the interference pattern is observed on a screen kept 1.5 m away. The separation between the successive bright fringes on the screen is:
Answer» In a Young's double slit experiment, the separation between the slits is $0.15 mm$ . In the experiment, a source of light of wavelength $589 nm$ is used, and the interference pattern is observed on a screen kept $1.5 m$ away. The separation between the successive bright fringes on the screen is:

Discussion

20.	In the reaction A+2B_ 2C if 2 moles of A and 3 moles of B and 2 moles of C are present in 2 l flask and equilibrium concentration of C is 0.5 moles find the equilibrium constant.hiw to find equilibrium concentration
Answer» In the reaction A+2B_ 2C if 2 moles of A and 3 moles of B and 2 moles of C are present in 2 l flask and equilibrium concentration of C is 0.5 moles find the equilibrium constant.hiw to find equilibrium concentration

Discussion

21.	The correct decreasing order of electron densities on benzene for the following compounds is:
Answer» The correct decreasing order of electron densities on benzene for the following compounds is:

Discussion

22.	1000 g impure sample of NaOH contains 3 mol of oxygen atoms. The % purity of the sample is:
Answer» 1000 g impure sample of NaOH contains 3 mol of oxygen atoms. The $%$ purity of the sample is:

Discussion

23.	Which of the following is not an aromatic compound?
Answer» Which of the following is not an aromatic compound?

Discussion

24.	Is SiCl4 electron deficient compound. Explain
Answer» Is SiCl₄ electron deficient compound. Explain

Discussion

25.	Since hydrogen is called as a non metal it should readily gain electron or in other words be electronegative. But then why is it electropositive?
Answer» Since hydrogen is called as a non metal it should readily gain electron or in other words be electronegative. But then why is it electropositive?

Discussion

26.	calculate the molecular weight of a subs†an ce whose 7.0 % by mass solution in water freezes at 0.93 degree Celsius . the cryoscopic cons†an t of water is 1.86 degree Celsius ki\log ram per mole
Answer» calculate the molecular weight of a subs†an ce whose 7.0 % by mass solution in water freezes at 0.93 degree Celsius . the cryoscopic cons†an t of water is 1.86 degree Celsius ki\log ram per mole

Discussion

27.	Howdoes ammonia react with a solution of Cu2+?
Answer» How does ammonia react with a solution of Cu²⁺?

Discussion

28.	What is an aqueous solution?
Answer» What is an aqueous solution?

Discussion

29.	A sample of HI(g) is placed in flask at a pressure of 0.2 atm. At equilibrium the partial pressure of HI(g) is 0.04 atm. What is Kp for the given equilibrium?
Answer» A sample of HI_(g) is placed in flask at a pressure of 0.2 atm. At equilibrium the partial pressure of HI_(g) is 0.04 atm. What is K_p for the given equilibrium?

29.

A sample of HI(g) is placed in flask at a pressure of 0.2 atm. At equilibrium the partial pressure of HI(g) is 0.04 atm. What is Kp for the given equilibrium?

Answer»

A sample of HI_(g) is placed in flask at a pressure of 0.2 atm. At equilibrium the partial pressure of HI_(g) is 0.04 atm. What is K_p for the given equilibrium?

Discussion

30.	The van't Hoff factor "i" for 0.2 molal aqueous solution of urea is:
Answer» The van't Hoff factor "i" for 0.2 molal aqueous solution of urea is:

Discussion

31.	What is process of distillation
Answer» What is process of distillation

Discussion

32.	If 2 electrode silver and zinc are connected in series and same electricity is passed in both solution .If mass of silver is 54g .Find mass of zn electrode.
Answer» If 2 electrode silver and zinc are connected in series and same electricity is passed in both solution .If mass of silver is 54g .Find mass of zn electrode.

Discussion

33.	Find the de broglie wavelength of a proton whoseK.E is equal to the restmass energy of an electron.
Answer» Find the de broglie wavelength of a proton whose K.E is equal to the restmass energy of an electron.

Discussion

34.	One mole each of CaC2, Al4C3 and Mg2C3 react with H2O in separate open flasks at 25oC. Numerical value of the work done by the system is in the order: Given reactions:CaC2(s)+2H2O(l)→Ca(OH)2(s)+C2H2(g)Al4C3(s)+12H2O(l)→4Al(OH)3(s)+3CH4(g)Mg2C3(s)+4H2O(l)→2Mg(OH)2(s)+CH3−C≡CH(g)
Answer» One mole each of $C a C_{2}, A l_{4} C_{3} a n d M g_{2} C_{3}$ react with $H_{2} O$ in separate open flasks at $25^{o} C .$ Numerical value of the work done by the system is in the order: Given reactions: $C a C_{2} (s) + 2 H_{2} O (l) \to C a (O H)_{2} (s) + C_{2} H_{2} (g)$ $A l_{4} C_{3} (s) + 12 H_{2} O (l) \to 4 A l (O H)_{3} (s) + 3 C H_{4} (g)$ $M g_{2} C_{3} (s) + 4 H_{2} O (l) \to 2 M g (O H)_{2} (s) + C H_{3} - C \equiv C H (g)$

Discussion

35.	Find the dimension of x if y=tan(xt) where t=time and y=not defined
Answer» Find the dimension of x if y=tan(xt) where t=time and y=not defined

Discussion

36.	One mole of air (Cv = 5R2)is confined at atmospheric pressure in a cylinder with a piston at 0°C. The initial volume occupied of gas is V. After the equivalent of 13200 J of heat is transferred to it, the volume of gas Vf is nearly Litre. (1 atm = 105 N/m2)
Answer» One mole of air $(C_{v} = \frac{5 R}{2})$ is confined at atmospheric pressure in a cylinder with a piston at 0 $° C$ . The initial volume occupied of gas is V. After the equivalent of 13200 J of heat is transferred to it, the volume of gas $V_{f}$ is nearly Litre. (1 atm = $10^{5} N / m^{2}$ )

Discussion

37.	The most acidic oxide among the following is:
Answer» The most acidic oxide among the following is:

Discussion

38.	Which of the following will not be produced when H2S reacts with MnO−4 in acidic solutions?
Answer» Which of the following will not be produced when $H_{2} S$ reacts with $M n O_{4}^{-}$ in acidic solutions?

Discussion

39.	equivalent weight of cl2 in reaction is: cl_{2\xrightarrow{naoh}}Nacl+Naclo3+H_{2 }o
Answer» equivalent weight of cl2 in reaction is: cl_{2\xrightarrow{naoh}}Nacl+Naclo3+H_{2 }o

Discussion

40.	Beryllium and magnesium do not give colour to flame whereas other alkaline earth metals do so. Why?
Answer» Beryllium and magnesium do not give colour to flame whereas other alkaline earth metals do so. Why?

Discussion

41.	The internal energy of a monatomic ideal gas is 1.5 nRT. One mole of helium is kept in a cylinder of cross section 8.5cm2. The cylinder is closed by a light frictionless piston. The gas is heated slowly in a process during which a total of 42 J heat is given to the gas. If the temperature rises through 2∘C, find the distance moved by the position. Atmospheric pressure = 100 kPa
Answer» The internal energy of a monatomic ideal gas is 1.5 nRT. One mole of helium is kept in a cylinder of cross section 8.5 $c m^{2}$ . The cylinder is closed by a light frictionless piston. The gas is heated slowly in a process during which a total of 42 J heat is given to the gas. If the temperature rises through $2^{\circ} C$ , find the distance moved by the position. Atmospheric pressure = 100 kPa

Discussion

42.	Among closely related molecules where the same atom loses Proton, which of the following statements is true? (a) increase in positive charge decreases acidity (b) increase in negative charge decreases acidity (c) increase in negative charge increases acidity (d) nothing can be said
Answer» Among closely related molecules where the same atom loses Proton, which of the following statements is true? (a) increase in positive charge decreases acidity (b) increase in negative charge decreases acidity (c) increase in negative charge increases acidity (d) nothing can be said

Discussion

43.	what is brahmaguptas formula of area
Answer» what is brahmaguptas formula of area

Discussion

44.	4. A monoatomic gas at pressure p1 and volume v1 os compressed adiabatically to 1/8th its original volume. What is the final pressure of the gas
Answer» 4. A monoatomic gas at pressure p1 and volume v1 os compressed adiabatically to 1/8th its original volume. What is the final pressure of the gas

Discussion

45.	do basic solutions also have h+ions? if yes, then why are thesebasic?
Answer» do basic solutions also have h+ions? if yes, then why are thesebasic?

Discussion

46.	Which of the following molecule is paramagnetic
Answer» Which of the following molecule is paramagnetic

46.

Which of the following molecule is paramagnetic

Answer»

Which of the following molecule is paramagnetic

Discussion

47.	Adsorption is multilayered in the case of [MP PET 1999]
Answer» Adsorption is multilayered in the case of [MP PET 1999]

Discussion

48.	In the following reactions, the major product W is:
Answer» In the following reactions, the major product $W$ is:

Discussion

49.	An isomer of ethanol is
Answer» An isomer of ethanol is

Discussion

50.	Which one of the following statements is incorrect in relation to ionization enthalpy? (a) Ionization enthalpy increases for each successive electron. (b) The greatest increase in ionization enthalpy is experienced on removal of electron from core noble gas configuration. (c) End of valence electrons is marked by a big jump in ionization enthalpy. (d) Removal of electron from orbitals bearing lower n value is easier than from orbital having higher n value.
Answer» Which one of the following statements is incorrect in relation to ionization enthalpy? (a) Ionization enthalpy increases for each successive electron. (b) The greatest increase in ionization enthalpy is experienced on removal of electron from core noble gas configuration. (c) End of valence electrons is marked by a big jump in ionization enthalpy. (d) Removal of electron from orbitals bearing lower n value is easier than from orbital having higher n value.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

20. Sodium forms body centred cubic crystals. What is the atomic radius of sodium if the length of the side of unit cell of sodium is 429.56 pm? 1) 170 pm 2) 186 pm 3) 220 pm 4) 160 pm

maximum number of orbitals in p shell is a.3 b.6 c.18. d.36

Which of the following compound has the greater enol content?

Concentrated aqueous sulphuric acid os 98% H2SO4 by mass and has a density of 1.80gm/L . Volume of acid required to make 1 litre of 0.1 M H2SO4 solution is 1)16.65mL 2)22.20mL 3)5.55mL 4)11.10

99.What is the amount of CaCl2 (molar mass = 111 g mol−1) which must be added to 500 g of water to lower its freezing point by 2 K, assuming CaCl2 is completely dissociated

For LED's to emit light in the visible region of electromagnetic light, it should have the energy band gap in the range of

Here A, B, X &amp; Y are

What is the Schrodinger's equation?

The role of a catalyst is to change ...... . (a) Gibbs energy of reaction (b) enthalpy of reaction (c) activation energy of reaction (d) equilibrium constant

A gaseous compound of molecular mass 82.1 dissociates on heating to 400K as : X2Y4(g)→X2(g)+2Y2(g). The density of the equilibrium mixture at a pressure of 1 atm and temperature of 400K is 2.0g L−1. The compound dissociates to the extent of :

Are all changes reversible? Justify your answer Give the classification of changes on the basis of the reversibility nature of the substances.

Calculate the electric flux through a curved surface area of cone.

The bond dissociation energies of X2,Y2andX Y are in the ratio of 1:0.5:1.DeltaHfortheformationofXYis-200kJmol^-1.thebonddissociationenergyofX2willbe(1)200kJmole^-1(2)800kJmole^-1(3)100kJmole^-1(4)400kJmole^-1

For the above reaction, addition of LiAlH4 in dry ether takes place at low temperature (−10 oC). What would be the product (B)?

White phosphorus burns in a limited supply of air to form a soft white solid. This solid is Phosphorus __.

For complete absorption, which of the following is true?a→ Absorptive powerr→ Reflective power

Molarity of NAOH in 200 mL of an aqueous solutionof it is 1M, find the change in molarity if 2g ofNAOH is added to it.(1) 1.25 M2) 0.25 M(3) 0.50 M(4) 0.75 M

In a Young's double slit experiment, the separation between the slits is 0.15 mm. In the experiment, a source of light of wavelength 589 nm is used, and the interference pattern is observed on a screen kept 1.5 m away. The separation between the successive bright fringes on the screen is:

In the reaction A+2B_ 2C if 2 moles of A and 3 moles of B and 2 moles of C are present in 2 l flask and equilibrium concentration of C is 0.5 moles find the equilibrium constant.hiw to find equilibrium concentration

The correct decreasing order of electron densities on benzene for the following compounds is:

1000 g impure sample of NaOH contains 3 mol of oxygen atoms. The % purity of the sample is:

Which of the following is not an aromatic compound?

Is SiCl4 electron deficient compound. Explain

Since hydrogen is called as a non metal it should readily gain electron or in other words be electronegative. But then why is it electropositive?

calculate the molecular weight of a subs†an ce whose 7.0 % by mass solution in water freezes at 0.93 degree Celsius . the cryoscopic cons†an t of water is 1.86 degree Celsius ki\log ram per mole

Howdoes ammonia react with a solution of Cu2+?

What is an aqueous solution?

A sample of HI(g) is placed in flask at a pressure of 0.2 atm. At equilibrium the partial pressure of HI(g) is 0.04 atm. What is Kp for the given equilibrium?

The van't Hoff factor "i" for 0.2 molal aqueous solution of urea is:

What is process of distillation

If 2 electrode silver and zinc are connected in series and same electricity is passed in both solution .If mass of silver is 54g .Find mass of zn electrode.

Find the de broglie wavelength of a proton whoseK.E is equal to the restmass energy of an electron.

One mole each of CaC2, Al4C3 and Mg2C3 react with H2O in separate open flasks at 25oC. Numerical value of the work done by the system is in the order: Given reactions:CaC2(s)+2H2O(l)→Ca(OH)2(s)+C2H2(g)Al4C3(s)+12H2O(l)→4Al(OH)3(s)+3CH4(g)Mg2C3(s)+4H2O(l)→2Mg(OH)2(s)+CH3−C≡CH(g)

Find the dimension of x if y=tan(xt) where t=time and y=not defined

One mole of air (Cv = 5R2)is confined at atmospheric pressure in a cylinder with a piston at 0°C. The initial volume occupied of gas is V. After the equivalent of 13200 J of heat is transferred to it, the volume of gas Vf is nearly Litre. (1 atm = 105 N/m2)

The most acidic oxide among the following is:

Which of the following will not be produced when H2S reacts with MnO−4 in acidic solutions?

equivalent weight of cl2 in reaction is: cl_{2\xrightarrow{naoh}}Nacl+Naclo3+H_{2 }o

Beryllium and magnesium do not give colour to flame whereas other alkaline earth metals do so. Why?

Among closely related molecules where the same atom loses Proton, which of the following statements is true? (a) increase in positive charge decreases acidity (b) increase in negative charge decreases acidity (c) increase in negative charge increases acidity (d) nothing can be said

what is brahmaguptas formula of area

4. A monoatomic gas at pressure p1 and volume v1 os compressed adiabatically to 1/8th its original volume. What is the final pressure of the gas

do basic solutions also have h+ions? if yes, then why are thesebasic?

Which of the following molecule is paramagnetic

Adsorption is multilayered in the case of [MP PET 1999]

In the following reactions, the major product W is:

An isomer of ethanol is

Here A, B, X & Y are