46295 + Interview Questions in Chemistry

1.	Identify the final product. AnilineNNO2, HCl−−−−−−−→0−5 oC(P)CuCN−−−−→(Q)H2/Ni−−−−→(R) (R)NaNO2−−−−→(S)
Answer» Identify the final product. $Aniline N N O_{2}, H C l - ------ \to 0 - 5^{o} C (P) C u C N - --- \to (Q) H_{2} / N i - --- \to (R)$ $(R) N a N O_{2} - --- \to (S)$

Discussion

2.	Why phenols are not useful for preparation of haloarenes
Answer» Why phenols are not useful for preparation of haloarenes

Discussion

3.	Calculate the amount of ice (in g) that will separate out on cooling a solution containing 31 g of ethylene glycol in 125 g water to −9.3 0C. Kf for water = 1.86 K mol−1 kg
Answer» Calculate the amount of ice (in g) that will separate out on cooling a solution containing 31 g of ethylene glycol in 125 g water to $- 9.3^{0} C$ . $K_{f}$ for water = 1.86 $K m o l^{- 1} k g$

Discussion

4.	Select the correct statement(s) from the following given statements
Answer» Select the correct statement(s) from the following given statements

4.

Select the correct statement(s) from the following given statements

Answer»

Select the correct statement(s) from the following given statements

Discussion

5.	Factorize: a2+4b2−3a+6b−4ab
Answer» Factorize: $a^{2} + 4 b^{2} - 3 a + 6 b - 4 a b$

Discussion

6.	Number of angular nodes in 3d_____
Answer» Number of angular nodes in 3d_____

Discussion

7.	If 30mL of H2 and 20mL of O2 react to form water 5mL of H2 is left at the end of reaction, is it correct assertion.
Answer» If 30mL of $H_{2}$ and 20mL of $O_{2}$ react to form water 5mL of $H_{2}$ is left at the end of reaction, is it correct assertion.

Discussion

8.	When CuSO4 is added to solution of ammonia then why freezing point is raised
Answer» When CuSO4 is added to solution of ammonia then why freezing point is raised

Discussion

9.	There is no electron in the nucleus of an atom. how then the beta particles are emitted from the nucleus of an atom?
Answer» There is no electron in the nucleus of an atom. how then the beta particles are emitted from the nucleus of an atom?

Discussion

10.	If one-third of HI decomposes at a particular temperature Kc for the reaction : 2HI⇌H2+I2 is:
Answer» If one-third of HI decomposes at a particular temperature $K_{c}$ for the reaction : $2 H I ⇌ H_{2} + I_{2}$ is:

Discussion

11.	In what cases do we use mass of solute/mass of solution for consentration?
Answer» In what cases do we use mass of solute/mass of solution for consentration?

Discussion

12.	Which of the following carbohydrates is called milk sugar?
Answer» Which of the following carbohydrates is called milk sugar?

Discussion

13.	Kf for a solvent is called
Answer» K_f for a solvent is called

Discussion

14.	Can in huckel's rule n hold fractional value ?
Answer» Can in huckel's rule n hold fractional value ?

Discussion

15.	For a Ist order decomposition of A as given Therefore rate constant (K) for the overall decomposition of A is
Answer» For a Ist order decomposition of A as given Therefore rate constant (K) for the overall decomposition of A is

Discussion

16.	Calcium carbonate reacts with aqueous HCl to give CaCl2 and CO2 according to the reaction: CaCO3(s)+HCl(aq)→CaCl2(aq)+CO2(g)+H2O(l) When 250 mL of 0.76 M HCl reacts with 1000 g of CaCO3, calculate the number of moles of CaCl2 formed:
Answer» Calcium carbonate reacts with aqueous HCl to give $C a C l_{2}$ and $C O_{2}$ according to the reaction: $C a C O_{3} (s) + H C l (a q) \to C a C l_{2} (a q) + C O_{2} (g) + H_{2} O (l)$ When 250 mL of 0.76 M HCl reacts with 1000 g of $C a C O_{3}$ , calculate the number of moles of $C a C l_{2}$ formed:

Discussion

17.	What is the product of the chemical reaction : 'NaHCO3 + CH3COOH' -->
Answer» What is the product of the chemical reaction : 'NaHCO₃ + CH₃COOH' -->

Discussion

18.	Which hydrogen like species will have the same radius as that of the first Bohr orbit of a hydrogen atom?
Answer» Which hydrogen like species will have the same radius as that of the first Bohr orbit of a hydrogen atom?

Discussion

19.	Between sodiumhydrogencarbonate and magnesium hydroxide which is a better antacid and why ?
Answer» Between sodiumhydrogencarbonate and magnesium hydroxide which is a better antacid and why ?

Discussion

20.	Rotenone is a
Answer» Rotenone is a

Discussion

21.	Elements of group 14 exhibit:
Answer» Elements of group 14 exhibit:

Discussion

22.	Peroxide effect proceeds by formation of:
Answer» Peroxide effect proceeds by formation of:

Discussion

23.	In which of the following cases incorrect direction of inductive effect is / are shown?
Answer» In which of the following cases incorrect direction of inductive effect is / are shown?

Discussion

24.	PhenolBr2−−−−−−→aq. NaOH Intermediate(s) for the given reaction is/are:
Answer» $Phenol B r_{2} - ----- \to a q . N a O H$ Intermediate(s) for the given reaction is/are:

Discussion

25.	The product formed when acetylene is passed through red hot tube is
Answer» The product formed when acetylene is passed through red hot tube is

Discussion

26.	R.Q. of 4 is obtained when respiratory substrate is
Answer» R.Q. of 4 is obtained when respiratory substrate is

Discussion

27.	2-chloro-2-methylpentane on reaction with sodium methoxide in methanol yields: (a) CH3 \|C2H5CH2C−OCH3 \| CH3 (b) C2H5CH2C=CH2 \| CH3 (c)C2H5CH=C−CH3 \| CH3
Answer» 2-chloro-2-methylpentane on reaction with sodium methoxide in methanol yields: (a) $C H_{3} \| C_{2} H_{5} C H_{2} C - O C H_{3} \| C H_{3}$ (b) $C_{2} H_{5} C H_{2} C = C H_{2} \| C H_{3}$ (c) $C_{2} H_{5} C H = C - C H_{3} \| C H_{3}$

27.

2-chloro-2-methylpentane on reaction with sodium methoxide in methanol yields: (a) CH3 |C2H5CH2C−OCH3 | CH3 (b) C2H5CH2C=CH2 | CH3 (c)C2H5CH=C−CH3 | CH3

Answer»

2-chloro-2-methylpentane on reaction with sodium methoxide in methanol yields:

(a) $C H_{3} | C_{2} H_{5} C H_{2} C - O C H_{3} | C H_{3}$

(b) $C_{2} H_{5} C H_{2} C = C H_{2} | C H_{3}$

(c) $C_{2} H_{5} C H = C - C H_{3} | C H_{3}$

Discussion

28.	Which of the following has the most acidic hydrogen -
Answer» Which of the following has the most acidic hydrogen -

Discussion

29.	The enolic form of ethyl acetoacetate as below has :
Answer» The enolic form of ethyl acetoacetate as below has :

Discussion

30.	The equilibrium constant at 298 K for a reaction A+B⇌C+D is 100. If the initial concentration of all the four species were 1 M each, then equilibrium concentration of D (in mol L−1) will be:
Answer» The equilibrium constant at 298 K for a reaction $A + B ⇌ C + D$ is 100. If the initial concentration of all the four species were 1 M each, then equilibrium concentration of D (in mol $L^{- 1}$ ) will be:

Discussion

31.	The electronic configuration of bivalent europium and trivalent cerium, are: (Atomic Number : Xe = 54, Ce = 58, Eu = 63)
Answer» The electronic configuration of bivalent europium and trivalent cerium, are: (Atomic Number : Xe = 54, Ce = 58, Eu = 63)

Discussion

32.	In Diborane, the hybridization of Boron is
Answer» In Diborane, the hybridization of Boron is

Discussion

33.	In which of the following reactions, only single isomer of alkene is formed?
Answer» In which of the following reactions, only single isomer of alkene is formed?

Discussion

34.	The number of isomers which are ethers and having the molecular formula C4H10O, is
Answer» The number of isomers which are ethers and having the molecular formula $C_{4} H_{10} O$ , is

Discussion

35.	Choose the correct increasing order of reactivity of alkyl halides with zinc and dilute HCl.
Answer» Choose the correct increasing order of reactivity of alkyl halides with zinc and dilute $H C l$ .

Discussion

36.	ClCH2COOH is heated with fuming HNO3 in the presence of AgNO3 in Carius tube. After filtration and washing the precipitate obtained is:
Answer» ClCH₂COOH is heated with fuming HNO₃ in the presence of AgNO₃ in Carius tube. After filtration and washing the precipitate obtained is:

Discussion

37.	Transition elements are regarded as:
Answer» Transition elements are regarded as:

Discussion

38.	Question 58 Why is it not possible to obtain pure ethanol by fractional distillation? What general name is given to binary mixtures which show deviation from Raoult's law and whose components cannot be separated by fractional distillation. How many types of such mixtures are there?
Answer» Question 58 Why is it not possible to obtain pure ethanol by fractional distillation? What general name is given to binary mixtures which show deviation from Raoult's law and whose components cannot be separated by fractional distillation. How many types of such mixtures are there?

Discussion

39.	Is (−NH−CHR−CO)n, a homopolymer or copolymer ?
Answer» Is $(- N H - C H R - C O)_{n}$ , a homopolymer or copolymer ?

Discussion

40.	The enthalpy of combustion of methane, graphite and dihydrogen at 298 K are, −890.3kJ mol−1–393.5kJ mol−1, and –285.8 kJ mol−1 respectively. Enthalpy of formation of CH4(g) will be (i) –74.8kJ mol−1 (ii) –52.27kJ mol−1 (iii) +74.8kJ mol−1 (iv) +52.26kJmol−1
Answer» The enthalpy of combustion of methane, graphite and dihydrogen at 298 K are, $- 890.3 k J m o l^{- 1} - 393.5 k J m o l^{- 1}$ , and $- 285.8 k J m o l^{- 1}$ respectively. Enthalpy of formation of $C H_{4 (g)}$ will be (i) $- 74.8 k J m o l^{- 1}$ (ii) $- 52.27 k J m o l^{- 1}$ (iii) $+ 74.8 k J m o l^{- 1}$ (iv) $+ 52.26 k J m o l^{- 1}$

Discussion

41.	Suggest the name of a Lewis acid other than anhydrous aluminium chloride which can be used during ethylation of benzene.
Answer» Suggest the name of a Lewis acid other than anhydrous aluminium chloride which can be used during ethylation of benzene.

Discussion

42.	On dissolving 1 mole each of the following acids in 1 L of water, the acid which gives a solution of 1 N strength would be
Answer» On dissolving 1 mole each of the following acids in 1 L of water, the acid which gives a solution of 1 N strength would be

Discussion

43.	A radioactive decay can form an isotope of the original nucleus with the emission of particles
Answer» A radioactive decay can form an isotope of the original nucleus with the emission of particles

Discussion

44.	Which one of the following is not a conjugate acid-base pair?
Answer» Which one of the following is not a conjugate acid-base pair?

Discussion

45.	In which of the following transition will the wavelength be minimum:
Answer» In which of the following transition will the wavelength be minimum:

Discussion

46.	A sample of 0.636 g of pure sodium carbonate is titrated with HCl solution. A volume of 60 mL is required to reach the end point. Calculate the molarity of the acid.
Answer» A sample of $0.636 g$ of pure sodium carbonate is titrated with $H C l$ solution. A volume of $60 mL$ is required to reach the end point. Calculate the molarity of the acid.

Discussion

47.	In Wurtz reaction, the reagent used is
Answer» In Wurtz reaction, the reagent used is

Discussion

48.	On moving across a period, the atomic size decreases and nuclear charge increases and therefore the force of attraction exerted by the nucleus on the electron in the outermost shell increases. Potassium forms K+ ion but it does not form K2+ because of;
Answer» On moving across a period, the atomic size decreases and nuclear charge increases and therefore the force of attraction exerted by the nucleus on the electron in the outermost shell increases. Potassium forms $K^{+}$ ion but it does not form $K^{2 +}$ because of;

Discussion

49.	The reaction of HClO4 and P4O10 gives an oxide ClxOy. x+y is ?
Answer» The reaction of $H C l O_{4}$ and $P_{4} O_{10}$ gives an oxide $C l_{x} O_{y}$ . $x + y$ is ?

Discussion

50.	Conductivity of 0.00241M acetic is 7.896×10−5S cm−1 Calculate its molar conductivity. If λ∘m for acetic acid is 390.5 S cm2mol−1, what is its dissociation constant ?
Answer» Conductivity of 0.00241M acetic is $7.896 \times 10^{- 5} S c m^{- 1}$ Calculate its molar conductivity. If $λ_{m}^{\circ}$ for acetic acid is $390.5 S c m^{2} m o l^{- 1}$ , what is its dissociation constant ?

50.

Conductivity of 0.00241M acetic is 7.896×10−5S cm−1 Calculate its molar conductivity. If λ∘m for acetic acid is 390.5 S cm2mol−1, what is its dissociation constant ?

Answer»

Conductivity of 0.00241M acetic is $7.896 \times 10^{- 5} S c m^{- 1}$

Calculate its molar conductivity. If $λ_{m}^{\circ}$ for acetic acid is $390.5 S c m^{2} m o l^{- 1}$ , what is its dissociation constant ?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Identify the final product. AnilineNNO2, HCl−−−−−−−→0−5 oC(P)CuCN−−−−→(Q)H2/Ni−−−−→(R) (R)NaNO2−−−−→(S)

Why phenols are not useful for preparation of haloarenes

Calculate the amount of ice (in g) that will separate out on cooling a solution containing 31 g of ethylene glycol in 125 g water to −9.3 0C. Kf for water = 1.86 K mol−1 kg

Select the correct statement(s) from the following given statements

Factorize: a2+4b2−3a+6b−4ab

Number of angular nodes in 3d_____

If 30mL of H2 and 20mL of O2 react to form water 5mL of H2 is left at the end of reaction, is it correct assertion.

When CuSO4 is added to solution of ammonia then why freezing point is raised

There is no electron in the nucleus of an atom. how then the beta particles are emitted from the nucleus of an atom?

If one-third of HI decomposes at a particular temperature Kc for the reaction : 2HI⇌H2+I2 is:

In what cases do we use mass of solute/mass of solution for consentration?

Which of the following carbohydrates is called milk sugar?

Kf for a solvent is called

Can in huckel's rule n hold fractional value ?

For a Ist order decomposition of A as given Therefore rate constant (K) for the overall decomposition of A is

Calcium carbonate reacts with aqueous HCl to give CaCl2 and CO2 according to the reaction: CaCO3(s)+HCl(aq)→CaCl2(aq)+CO2(g)+H2O(l) When 250 mL of 0.76 M HCl reacts with 1000 g of CaCO3, calculate the number of moles of CaCl2 formed:

What is the product of the chemical reaction : 'NaHCO3 + CH3COOH' -->

Which hydrogen like species will have the same radius as that of the first Bohr orbit of a hydrogen atom?

Between sodiumhydrogencarbonate and magnesium hydroxide which is a better antacid and why ?

Rotenone is a

Elements of group 14 exhibit:

Peroxide effect proceeds by formation of:

In which of the following cases incorrect direction of inductive effect is / are shown?

PhenolBr2−−−−−−→aq. NaOH Intermediate(s) for the given reaction is/are:

The product formed when acetylene is passed through red hot tube is

R.Q. of 4 is obtained when respiratory substrate is

2-chloro-2-methylpentane on reaction with sodium methoxide in methanol yields: (a) CH3 |C2H5CH2C−OCH3 | CH3 (b) C2H5CH2C=CH2 | CH3 (c)C2H5CH=C−CH3 | CH3

Which of the following has the most acidic hydrogen -

The enolic form of ethyl acetoacetate as below has :

The equilibrium constant at 298 K for a reaction A+B⇌C+D is 100. If the initial concentration of all the four species were 1 M each, then equilibrium concentration of D (in mol L−1) will be:

The electronic configuration of bivalent europium and trivalent cerium, are: (Atomic Number : Xe = 54, Ce = 58, Eu = 63)

In Diborane, the hybridization of Boron is

In which of the following reactions, only single isomer of alkene is formed?

The number of isomers which are ethers and having the molecular formula C4H10O, is

Choose the correct increasing order of reactivity of alkyl halides with zinc and dilute HCl.

ClCH2COOH is heated with fuming HNO3 in the presence of AgNO3 in Carius tube. After filtration and washing the precipitate obtained is:

Transition elements are regarded as:

Question 58 Why is it not possible to obtain pure ethanol by fractional distillation? What general name is given to binary mixtures which show deviation from Raoult's law and whose components cannot be separated by fractional distillation. How many types of such mixtures are there?

Is (−NH−CHR−CO)n, a homopolymer or copolymer ?

The enthalpy of combustion of methane, graphite and dihydrogen at 298 K are, −890.3kJ mol−1–393.5kJ mol−1, and –285.8 kJ mol−1 respectively. Enthalpy of formation of CH4(g) will be (i) –74.8kJ mol−1 (ii) –52.27kJ mol−1 (iii) +74.8kJ mol−1 (iv) +52.26kJmol−1

Suggest the name of a Lewis acid other than anhydrous aluminium chloride which can be used during ethylation of benzene.

On dissolving 1 mole each of the following acids in 1 L of water, the acid which gives a solution of 1 N strength would be

A radioactive decay can form an isotope of the original nucleus with the emission of particles

Which one of the following is not a conjugate acid-base pair?

In which of the following transition will the wavelength be minimum:

A sample of 0.636 g of pure sodium carbonate is titrated with HCl solution. A volume of 60 mL is required to reach the end point. Calculate the molarity of the acid.

In Wurtz reaction, the reagent used is

On moving across a period, the atomic size decreases and nuclear charge increases and therefore the force of attraction exerted by the nucleus on the electron in the outermost shell increases. Potassium forms K+ ion but it does not form K2+ because of;

The reaction of HClO4 and P4O10 gives an oxide ClxOy. x+y is ?

Conductivity of 0.00241M acetic is 7.896×10−5S cm−1 Calculate its molar conductivity. If λ∘m for acetic acid is 390.5 S cm2mol−1, what is its dissociation constant ?