46295 + Interview Questions in Chemistry

1.	Which of the following is not the possible structure of C4H9Br?
Answer» Which of the following is not the possible structure of C₄H₉Br?

Discussion

2.	1.0mole of dinitrogen gas at STP condition was put into a vessel of volume 0.025m cube maintained at the temperature of 50degree c. What is the pressure of the gas in the vessel
Answer» 1.0mole of dinitrogen gas at STP condition was put into a vessel of volume 0.025m cube maintained at the temperature of 50degree c. What is the pressure of the gas in the vessel

Discussion

3.	Name the chemical whose deficiency causes Parkinson’s disease while excess produces schizophrenia.
Answer» Name the chemical whose deficiency causes Parkinson’s disease while excess produces schizophrenia.

Discussion

4.	Given the standard reduction potentials: Zn2+/Zn = - 0.74 V, Cl2/Cl- = 1.36 V, H+/1/2H2 = 0 V and Fe3+/Fe2+ = 0.77 V. The order of increasing strength as reducing agent is
Answer» Given the standard reduction potentials: Zn²⁺/Zn = - 0.74 V, Cl₂/Cl^- = 1.36 V, H⁺/1/2H₂ = 0 V and Fe³⁺/Fe²⁺ = 0.77 V. The order of increasing strength as reducing agent is

Discussion

5.	Which of the following is incorrect for group 14 elements?
Answer» Which of the following is incorrect for group 14 elements?

Discussion

6.	Aluminium chloride exists as a dimer (Al2Cl6) in solid state as well as in solution of non-polar solvents such as C6H6. When dissolved in water it gives:
Answer» Aluminium chloride exists as a dimer ( $A l_{2} C l_{6}$ ) in solid state as well as in solution of non-polar solvents such as $C_{6} H_{6}$ . When dissolved in water it gives:

Discussion

7.	For the oxidation of iron, the entropy change is -549.45J/K.mol at 298K. Though it has negative entropy change, the reaction is spontaneous. Why? The reaction is 4Fe+3O2 gives 2Fe2O3
Answer» For the oxidation of iron, the entropy change is -549.45J/K.mol at 298K. Though it has negative entropy change, the reaction is spontaneous. Why? The reaction is 4Fe+3O₂ gives 2Fe₂O₃

Discussion

8.	Sir, whether the anion mechanism in'Woortz' reaction obeys that carbon atoms in product side double reactant side
Answer» Sir, whether the anion mechanism in'Woortz' reaction obeys that carbon atoms in product side double reactant side

Discussion

9.	Na2O2Water−−−−→ColdP+Q Na2O2Water−−−−→WarmP+R The sum of bond order between same bonded atoms in Q and R compounds is:
Answer» $N a_{2} O_{2} W a t e r - --- \to C o l d P + Q$ $N a_{2} O_{2} W a t e r - --- \to W a r m P + R$ The sum of bond order between same bonded atoms in Q and R compounds is:

Discussion

10.	In a certain reaction, 10% of the reactant decomposes in 1 hr, 20 % in two hours, 30% in three hours and so on the dimensions of the rate constant is
Answer» In a certain reaction, 10 $%$ of the reactant decomposes in 1 hr, 20 $%$ in two hours, 30 $%$ in three hours and so on the dimensions of the rate constant is

Discussion

11.	In Castner Kellner cell:
Answer» In Castner Kellner cell:

Discussion

12.	In a solid, AB having the NaCl structure, A atoms occupy the corners of the cubic unit cell. If all the face centered atoms along one of the axes are removed, then the resultant stoichiometry of the solid is
Answer» In a solid, AB having the NaCl structure, A atoms occupy the corners of the cubic unit cell. If all the face centered atoms along one of the axes are removed, then the resultant stoichiometry of the solid is

Discussion

13.	The dissociation energy of CH4 is 400 Kcal mol−1 and that of ethane is 670 Kcal mol−1. The C - C bond energy is.
Answer» The dissociation energy of $C H_{4}$ is 400 Kcal $m o l^{- 1}$ and that of ethane is 670 Kcal $m o l^{- 1}$ . The C - C bond energy is.

Discussion

14.	Ebonite is [CBSE PMT 2000]
Answer» Ebonite is [CBSE PMT 2000]

Discussion

15.	Identify ‘Q’ in the following sequence of reactions;
Answer» Identify ‘Q’ in the following sequence of reactions;

15.

Identify ‘Q’ in the following sequence of reactions;

Answer»

Identify ‘Q’ in the following sequence of reactions;

Discussion

16.	C6H5-NH-C6H5 is :
Answer» C₆H₅-NH-C₆H₅ is :

Discussion

17.	Assertion (A) All collision of reactant molecules lead to product formation. Reason (R) Only those collisions in which molecules have correct orientation and sufficient kinetic energy lead to compound formation. (a) Both assertion and reason are correct and the reason is correct explanation of assertion (b) Both assertion and reason are correct, but reason does not explain assertion. (c) Assertion is correct, but reason is incorrect (d) Both assertion and reason are incorrect (e) Assertion is incorrect but reason is correct.
Answer» Assertion (A) All collision of reactant molecules lead to product formation. Reason (R) Only those collisions in which molecules have correct orientation and sufficient kinetic energy lead to compound formation. (a) Both assertion and reason are correct and the reason is correct explanation of assertion (b) Both assertion and reason are correct, but reason does not explain assertion. (c) Assertion is correct, but reason is incorrect (d) Both assertion and reason are incorrect (e) Assertion is incorrect but reason is correct.

17.

Assertion (A) All collision of reactant molecules lead to product formation. Reason (R) Only those collisions in which molecules have correct orientation and sufficient kinetic energy lead to compound formation. (a) Both assertion and reason are correct and the reason is correct explanation of assertion (b) Both assertion and reason are correct, but reason does not explain assertion. (c) Assertion is correct, but reason is incorrect (d) Both assertion and reason are incorrect (e) Assertion is incorrect but reason is correct.

Answer»

Assertion (A) All collision of reactant molecules lead to product formation.

Reason (R) Only those collisions in which molecules have correct orientation and sufficient kinetic energy lead to compound formation.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

Discussion

18.	Two solutions A and B have pH values of 3.0 and 10.5 respectivley. Which of these will turn: (i) Blue litmus solution to red and (ii) Phenolphthalein from colourless to pink? Justify your answer in each case.
Answer» Two solutions A and B have pH values of 3.0 and 10.5 respectivley. Which of these will turn: (i) Blue litmus solution to red and (ii) Phenolphthalein from colourless to pink? Justify your answer in each case.

Discussion

19.	Covalent bond length of chlorine molecule is 1.98A∘. Then covalent radius of chlorine is
Answer» Covalent bond length of chlorine molecule is $1.98 A^{\circ}$ . Then covalent radius of chlorine is

Discussion

20.	Which of the following compounds is not aromatic?
Answer» Which of the following compounds is not aromatic?

Discussion

21.	Which of the following process energy is liberated -
Answer» Which of the following process energy is liberated -

Discussion

22.	The most stable complexes are formed according by Irving william order by
Answer» The most stable complexes are formed according by Irving william order by

Discussion

23.	Which of the following hydride is least stable?
Answer» Which of the following hydride is least stable?

Discussion

24.	Proteins when heated with conc. HNO3 give a yellow colour. This is[CPMT 1989]
Answer» Proteins when heated with conc. HNO₃ give a yellow colour. This is [CPMT 1989]

24.

Proteins when heated with conc. HNO3 give a yellow colour. This is[CPMT 1989]

Answer»

Proteins when heated with conc. HNO₃ give a yellow colour. This is

[CPMT 1989]

Discussion

25.	For the reaction 2A(g)+B(g)→2D(g)Δ Uθ=−10.5 kJ and Δ Sθ=–44.1 JK−1. Calculate Δ Gθ for the reaction, and predict whether the reaction may occur spontaneously.
Answer» For the reaction $2 A_{(g)} + B_{(g)} \to 2 D_{(g)} Δ U^{θ} = - 10.5 k J a n d Δ S^{θ} = - 44.1 J K^{- 1}$ . Calculate $Δ G^{θ}$ for the reaction, and predict whether the reaction may occur spontaneously.

Discussion

26.	The oxidant which is used as an antiseptic is:
Answer» The oxidant which is used as an antiseptic is:

Discussion

27.	What would be the product of electrolysis if molten ICl3 is electrolysed ?
Answer» What would be the product of electrolysis if molten ICl₃ is electrolysed ?

Discussion

28.	Evaluate the following limit: limx→0 x sec x
Answer» Evaluate the following limit: $lim x \to 0$ x sec x

Discussion

29.	The nature of heterocyclic compounds is
Answer» The nature of heterocyclic compounds is

Discussion

30.	If the ratio of specific heat of a gas at constant pressure to that at constant volume is γ, the change in internal energy of a mass of gas, when the volume changes from V to 2V under constant pressure P, is
Answer» If the ratio of specific heat of a gas at constant pressure to that at constant volume is $γ,$ the change in internal energy of a mass of gas, when the volume changes from $V$ to $2 V$ under constant pressure $P$ , is

Discussion

31.	The IUPAC name of β-ethoxy-α-hydroxypropanic acid is
Answer» The IUPAC name of $β$ -ethoxy- $α$ -hydroxypropanic acid is

Discussion

32.	When CO2 is passed through lime water, it turns milky due to formation of
Answer» When $C O_{2}$ is passed through lime water, it turns milky due to formation of

Discussion

33.	Name the major ester in the following reaction?
Answer» Name the major ester in the following reaction?

Discussion

34.	During the purification of Cu by electrolysis:
Answer» During the purification of $C u$ by electrolysis:

Discussion

35.	The degree of hydrolysis of 0.1 M NaCN solution is 4%. What will be the solubility of Al(OH)3 in this solution? [Ksp of Al(OH)3=6.4×10−20]
Answer» The degree of hydrolysis of $0.1 M N a C N$ solution is $4 %$ . What will be the solubility of $A l (O H)_{3}$ in this solution? $[K_{s p} o f A l (O H)_{3} = 6.4 \times 10^{- 20}]$

Discussion

36.	Identify the major product.
Answer» Identify the major product.

Discussion

37.	Which of the following species is/are not known?
Answer» Which of the following species is/are not known?

Discussion

38.	The liquid shown in figure in two arm are mercury (specific gravity = 13.6) and water if the difference of height of the mercury column is 2 cm find the height h of the water column.
Answer» The liquid shown in figure in two arm are mercury (specific gravity = 13.6) and water if the difference of height of the mercury column is 2 cm find the height h of the water column.

38.

The liquid shown in figure in two arm are mercury (specific gravity = 13.6) and water if the difference of height of the mercury column is 2 cm find the height h of the water column.

Answer»

The liquid shown in figure in two arm are mercury (specific gravity = 13.6) and water if the difference of height of the mercury column is 2 cm find the height h of the water column.

Discussion

39.	'C−C' bond length in benzene lies between single and double bond.The reason is
Answer» ' $C - C$ ' bond length in benzene lies between single and double bond.The reason is

Discussion

40.	Which ones of the following reactions are artificial radioactive decay?
Answer» Which ones of the following reactions are artificial radioactive decay?

Discussion

41.	Which of the following elements can show covalencey greater than 4? (a) Be (b) P (c) S (d) B
Answer» Which of the following elements can show covalencey greater than 4? (a) Be (b) P (c) S (d) B

Discussion

42.	CH3CHO and C6H5CH2CHO can be distinguished by:
Answer» $C H_{3} C H O$ and $C_{6} H_{5} C H_{2} C H O$ can be distinguished by:

Discussion

43.	Arrange the following in decreasing order of their acidic strengths :
Answer» Arrange the following in decreasing order of their acidic strengths :

Discussion

44.	List-I contains reactions and List-II contains the reagents to effect the conversion. Which of the following option is correct regarding List-I and List-II?
Answer» List-I contains reactions and List-II contains the reagents to effect the conversion. Which of the following option is correct regarding List-I and List-II?

Discussion

45.	For oxidizing alcohols, several oxidants – each with a multivalent central atom as the active species – can be used. When Chromic acid, with Cr as the multivalent atom is used, how many bonds to oxygen atoms does each central multivalent atom have just before and immediately after the oxidation respectively?
Answer» For oxidizing alcohols, several oxidants – each with a multivalent central atom as the active species – can be used. When Chromic acid, with Cr as the multivalent atom is used, how many bonds to oxygen atoms does each central multivalent atom have just before and immediately after the oxidation respectively?

Discussion

46.	The smallest number, when it divided by 12,15,20 and 54, leaves a remainder of 6 in each case is
Answer» The smallest number, when it divided by $12, 15, 20$ and $54$ , leaves a remainder of $6$ in each case is

Discussion

47.	What is the harmful effect of hyperacidity?
Answer» What is the harmful effect of hyperacidity?

Discussion

48.	A stopcock that connects 2 bulbs of volumes 5 litres and 10 litres each containing the same ideal gas at 9 atm and 6 atm respectively is opened. What is the final pressure in the two bulbs if the temperature is maintained at a constant value? ___
Answer» A stopcock that connects 2 bulbs of volumes 5 litres and 10 litres each containing the same ideal gas at 9 atm and 6 atm respectively is opened. What is the final pressure in the two bulbs if the temperature is maintained at a constant value? ___

Discussion

49.	If the temperature of 1 L of a gas is increased from 27∘C to 57∘C, find the final volume of the gas, assuming the pressure to be constant.
Answer» If the temperature of 1 L of a gas is increased from $27^{\circ} C$ to $57^{\circ} C$ , find the final volume of the gas, assuming the pressure to be constant.

Discussion

50.	The principle ore from which copper is extracted is copper __.
Answer» The principle ore from which copper is extracted is copper __.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Which of the following is not the possible structure of C4H9Br?

1.0mole of dinitrogen gas at STP condition was put into a vessel of volume 0.025m cube maintained at the temperature of 50degree c. What is the pressure of the gas in the vessel

Name the chemical whose deficiency causes Parkinson’s disease while excess produces schizophrenia.

Given the standard reduction potentials: Zn2+/Zn = - 0.74 V, Cl2/Cl- = 1.36 V, H+/1/2H2 = 0 V and Fe3+/Fe2+ = 0.77 V. The order of increasing strength as reducing agent is

Which of the following is incorrect for group 14 elements?

Aluminium chloride exists as a dimer (Al2Cl6) in solid state as well as in solution of non-polar solvents such as C6H6. When dissolved in water it gives:

For the oxidation of iron, the entropy change is -549.45J/K.mol at 298K. Though it has negative entropy change, the reaction is spontaneous. Why? The reaction is 4Fe+3O2 gives 2Fe2O3

Sir, whether the anion mechanism in'Woortz' reaction obeys that carbon atoms in product side double reactant side

Na2O2Water−−−−→ColdP+Q Na2O2Water−−−−→WarmP+R The sum of bond order between same bonded atoms in Q and R compounds is:

In a certain reaction, 10% of the reactant decomposes in 1 hr, 20 % in two hours, 30% in three hours and so on the dimensions of the rate constant is

In Castner Kellner cell:

In a solid, AB having the NaCl structure, A atoms occupy the corners of the cubic unit cell. If all the face centered atoms along one of the axes are removed, then the resultant stoichiometry of the solid is

The dissociation energy of CH4 is 400 Kcal mol−1 and that of ethane is 670 Kcal mol−1. The C - C bond energy is.

Ebonite is [CBSE PMT 2000]

Identify ‘Q’ in the following sequence of reactions;

C6H5-NH-C6H5 is :

Two solutions A and B have pH values of 3.0 and 10.5 respectivley. Which of these will turn: (i) Blue litmus solution to red and (ii) Phenolphthalein from colourless to pink? Justify your answer in each case.

Covalent bond length of chlorine molecule is 1.98A∘. Then covalent radius of chlorine is

Which of the following compounds is not aromatic?

Which of the following process energy is liberated -

The most stable complexes are formed according by Irving william order by

Which of the following hydride is least stable?

Proteins when heated with conc. HNO3 give a yellow colour. This is[CPMT 1989]

For the reaction 2A(g)+B(g)→2D(g)Δ Uθ=−10.5 kJ and Δ Sθ=–44.1 JK−1. Calculate Δ Gθ for the reaction, and predict whether the reaction may occur spontaneously.

The oxidant which is used as an antiseptic is:

What would be the product of electrolysis if molten ICl3 is electrolysed ?

Evaluate the following limit: limx→0 x sec x

The nature of heterocyclic compounds is

If the ratio of specific heat of a gas at constant pressure to that at constant volume is γ, the change in internal energy of a mass of gas, when the volume changes from V to 2V under constant pressure P, is

The IUPAC name of β-ethoxy-α-hydroxypropanic acid is

When CO2 is passed through lime water, it turns milky due to formation of

Name the major ester in the following reaction?

During the purification of Cu by electrolysis:

The degree of hydrolysis of 0.1 M NaCN solution is 4%. What will be the solubility of Al(OH)3 in this solution? [Ksp of Al(OH)3=6.4×10−20]

Identify the major product.

Which of the following species is/are not known?

The liquid shown in figure in two arm are mercury (specific gravity = 13.6) and water if the difference of height of the mercury column is 2 cm find the height h of the water column.

'C−C' bond length in benzene lies between single and double bond.The reason is

Which ones of the following reactions are artificial radioactive decay?

Which of the following elements can show covalencey greater than 4? (a) Be (b) P (c) S (d) B

CH3CHO and C6H5CH2CHO can be distinguished by:

Arrange the following in decreasing order of their acidic strengths :

List-I contains reactions and List-II contains the reagents to effect the conversion. Which of the following option is correct regarding List-I and List-II?

The smallest number, when it divided by 12,15,20 and 54, leaves a remainder of 6 in each case is

What is the harmful effect of hyperacidity?

A stopcock that connects 2 bulbs of volumes 5 litres and 10 litres each containing the same ideal gas at 9 atm and 6 atm respectively is opened. What is the final pressure in the two bulbs if the temperature is maintained at a constant value? ___

If the temperature of 1 L of a gas is increased from 27∘C to 57∘C, find the final volume of the gas, assuming the pressure to be constant.

The principle ore from which copper is extracted is copper __.