46295 + Interview Questions in Chemistry

1.	The solubility product of A2X3 is 1.08×10−23, its solubility will be:
Answer» The solubility product of $A_{2} X_{3}$ is $1.08 \times 10^{- 23}$ , its solubility will be:

Discussion

2.	Two substances A and B are present such that [A]=4[B] and half -life of A is 5 minute and of B is 15 minute . If they start decaying at the same time following first order, how much time later will the concentration of both of them would be same?
Answer» Two substances A and B are present such that [A]=4[B] and half -life of A is 5 minute and of B is 15 minute . If they start decaying at the same time following first order, how much time later will the concentration of both of them would be same?

2.

Two substances A and B are present such that [A]=4[B] and half -life of A is 5 minute and of B is 15 minute . If they start decaying at the same time following first order, how much time later will the concentration of both of them would be same?

Answer»

Two substances A and B are present such that [A]=4[B] and half -life of A is 5 minute and of B is 15 minute . If they start decaying at the same time following first order, how much time later will the concentration of both of them would be same?

Discussion

3.	what is helmholtz colis?
Answer» what is helmholtz colis?

Discussion

4.	22.What is the function is sie in orbital
Answer» 22.What is the function is sie in orbital

Discussion

5.	4-methylphenol +CHCl3\xrightarrow{NaOH}salicyaldihyde + quinone derivative 4-methoxyphenol+CHCl3\overset{NaOH}{→ product (no quinone derivative)why} why different products are formed when OMe is replaced by -Me
Answer» 4-methylphenol +CHCl3\xrightarrow{NaOH}salicyaldihyde + quinone derivative 4-methoxyphenol+CHCl3\overset{NaOH}{→ product (no quinone derivative)why} why different products are formed when OMe is replaced by -Me

Discussion

6.	What will be the concentration of H ion in a solution if potential of hydrogen electrode is -118.2mV? (pH2 is 1atm)
Answer» What will be the concentration of H ion in a solution if potential of hydrogen electrode is -118.2mV? (pH2 is 1atm)

Discussion

7.	A compound contains 6.4% by mass of oxygen. It contains two moles of oxygen per mole of the compound. What is the molar mass of the compound?
Answer» A compound contains $6.4 %$ by mass of oxygen. It contains two moles of oxygen per mole of the compound. What is the molar mass of the compound?

Discussion

8.	Which of the following pairs represents anomers?
Answer» Which of the following pairs represents anomers?

Discussion

9.	47.The density of every substance get increase when it is solidified but when water is converted into ice the density of ice is less then water why?
Answer» 47.The density of every substance get increase when it is solidified but when water is converted into ice the density of ice is less then water why?

Discussion

10.	What is the pressure inside the drop of mercury of radius 3.00 mm at room temperature? Surface tension of mercury at that temperature (20°C) is 4.65 × 10–1 N m–1. The atmospheric pressure is 1.01 × 105 Pa. Also give the excess pressure inside the drop.
Answer» What is the pressure inside the drop of mercury of radius 3.00 mm at room temperature? Surface tension of mercury at that temperature (20°C) is 4.65 × 10^–1 N m^–1. The atmospheric pressure is 1.01 × 10⁵ Pa. Also give the excess pressure inside the drop.

Discussion

11.	The pH of an aqueous solution at 25∘C having 0.1 M NaOH and 0.3 M to acetic acid (pKa = 4.76) would be nearly
Answer» The pH of an aqueous solution at $25^{\circ} C$ having 0.1 M NaOH and 0.3 M to acetic acid ( $p K_{a}$ = 4.76) would be nearly

Discussion

12.	73. The stable Oxidation state of Sulphur can be +2, still SF2 is not possible. Why?
Answer» 73. The stable Oxidation state of Sulphur can be +2, still SF2 is not possible. Why?

Discussion

13.	The reagent(s) that can selectively precipitate S2− from a mixture of S2– and SO2−4 in aqueous solution is/are:
Answer» The reagent(s) that can selectively precipitate $S^{2 -}$ from a mixture of $S^{2 -}$ and $S O_{4}^{2 -}$ in aqueous solution is/are:

Discussion

14.	49. Wurtz reaction on a mixture of ethyl halide and isobutyl halide gives
Answer» 49. Wurtz reaction on a mixture of ethyl halide and isobutyl halide gives

Discussion

15.	8. Why conductivity of a solution does decreases with dilution
Answer» 8. Why conductivity of a solution does decreases with dilution

Discussion

16.	How does nabh4,lialh4 react with alpha-beta unstaurated 1)aldehyde 2) ketone with provide some exceptions?separtely for aldehyde and ketone
Answer» How does nabh4,lialh4 react with alpha-beta unstaurated 1)aldehyde 2) ketone with provide some exceptions?separtely for aldehyde and ketone

Discussion

17.	Elements A and B do not form solid bicarbonate but react with N2 to give nitrides. Which of the following can be A and B?
Answer» Elements A and B do not form solid bicarbonate but react with $N_{2}$ to give nitrides. Which of the following can be A and B?

Discussion

18.	Find the total number of acyclic structural isomers of molecular formula C4H6.
Answer» Find the total number of acyclic structural isomers of molecular formula $C_{4} H_{6}$ .

Discussion

19.	why the freezing point of a solution is less than the pure solvent?
Answer» why the freezing point of a solution is less than the pure solvent?

Discussion

20.	Which of the following statement is true ?
Answer» Which of the following statement is true ?

Discussion

21.	For gas 'A in a calorimeter heat evolved is 250 kJ/mol.For 0.2 mol of A, temperature rise from 298 K to300 K. Find out heat capacity of calorimeter:-(1) 12.5 kJ/K(3) 50 kJ/K(2) 25 kJ/K(4) 100 kJ/K
Answer» For gas 'A in a calorimeter heat evolved is 250 kJ/mol.For 0.2 mol of A, temperature rise from 298 K to300 K. Find out heat capacity of calorimeter:-(1) 12.5 kJ/K(3) 50 kJ/K(2) 25 kJ/K(4) 100 kJ/K

Discussion

22.	Calculate the entropy change ( in J K−1) when 220 g of Carbon dioxide expands reversibly and isothermally from an initial volume of 1 litre to 100 litre at 600 K.
Answer» Calculate the entropy change ( $i n J K^{- 1}$ ) when $220 g$ of Carbon dioxide expands reversibly and isothermally from an initial volume of $1 l i t r e$ to $100 l i t r e$ at $600 K$ .

Discussion

23.	What is coordinate bond? Explain it brief
Answer» What is coordinate bond? Explain it brief

Discussion

24.	Which of the following compound will most readily give a cyclic product when treated with a base?
Answer» Which of the following compound will most readily give a cyclic product when treated with a base?

Discussion

25.	in the formula for finding the no of moles we need to keep in mind the molar mass of the molecule or it would be given to us?
Answer» in the formula for finding the no of moles we need to keep in mind the molar mass of the molecule or it would be given to us?

Discussion

26.	According to Heisenberg's uncertainty principle:
Answer» According to Heisenberg's uncertainty principle:

Discussion

27.	limx->1(ax^2+bx+c/cx^2+bx+a)
Answer» limx->1(ax^2+bx+c/cx^2+bx+a)

Discussion

28.	20.HLA is also a multiple allele Then for that what is the value of n? i.e value of multiple alleles?
Answer» 20.HLA is also a multiple allele Then for that what is the value of n? i.e value of multiple alleles?

Discussion

29.	What is imaginary - Resonance structures or resonance hybrid? Why?
Answer» What is imaginary - Resonance structures or resonance hybrid? Why?

Discussion

30.	38. A gaseous mixture contains oxygen and nitrogen in the ratio of 1 : 16 by mass. The ratio of their respective number of molecules is ??
Answer» 38. A gaseous mixture contains oxygen and nitrogen in the ratio of 1 : 16 by mass. The ratio of their respective number of molecules is ??

Discussion

31.	If an electron is placed in an uniform external electric field, then what is the path of the electron?
Answer» If an electron is placed in an uniform external electric field, then what is the path of the electron?

Discussion

32.	The Mass percentage of nitrogen in histamine is
Answer» The Mass percentage of nitrogen in histamine is

Discussion

33.	Which of the following is/are electrophile?
Answer» Which of the following is/are electrophile?

Discussion

34.	Natural rubber has
Answer» Natural rubber has

Discussion

35.	In the question arrange the compounds in increasing order of rate of reaction towards nucleophilic substitution. (a) (i) < (ii) < (iii) (b) (ii) < (i) < (iii) (c) (iii) < (ii) < (i) (d) (i) < (iii) < (ii)
Answer» In the question arrange the compounds in increasing order of rate of reaction towards nucleophilic substitution. (a) (i) < (ii) < (iii) (b) (ii) < (i) < (iii) (c) (iii) < (ii) < (i) (d) (i) < (iii) < (ii)

35.

In the question arrange the compounds in increasing order of rate of reaction towards nucleophilic substitution. (a) (i) < (ii) < (iii) (b) (ii) < (i) < (iii) (c) (iii) < (ii) < (i) (d) (i) < (iii) < (ii)

Answer»

In the question arrange the compounds in increasing order of rate of reaction towards nucleophilic substitution.

(a) (i) < (ii) < (iii) (b) (ii) < (i) < (iii) (c) (iii) < (ii) < (i) (d) (i) < (iii) < (ii)

Discussion

36.	33. A certain sample of gas has a volume of 0.2 litre measured at 1 atm pressure and 0 degree Celsius. At the same pressure, but at 273 degree Celsius it's volume will be?
Answer» 33. A certain sample of gas has a volume of 0.2 litre measured at 1 atm pressure and 0 degree Celsius. At the same pressure, but at 273 degree Celsius it's volume will be?

Discussion

37.	Which one of the following group represent 2-D silicate?
Answer» Which one of the following group represent 2-D silicate?

Discussion

38.	In the following reactions, The major products (A) and (C) are respectively:
Answer» In the following reactions, The major products (A) and (C) are respectively:

Discussion

39.	28.WHEN WE HAVE TO FIND ENTHALPY OF A REACTION, WE USE ENHALY OF FORMATION OF REACTANT AND PRODUCT ,THAT IS SUM OF ENTHAPLY OF FORMATION OF PRODUCT - SUM OF ENTHALPY OF FORMATION OF REACTANT / WHAT IS THE RELATIO BTW THE TWO TYPES OF ENTHALPY , DUE TO WHICH WE DO SO ??
Answer» 28.WHEN WE HAVE TO FIND ENTHALPY OF A REACTION, WE USE ENHALY OF FORMATION OF REACTANT AND PRODUCT ,THAT IS SUM OF ENTHAPLY OF FORMATION OF PRODUCT - SUM OF ENTHALPY OF FORMATION OF REACTANT / WHAT IS THE RELATIO BTW THE TWO TYPES OF ENTHALPY , DUE TO WHICH WE DO SO ??

Discussion

40.	Urea is converted into ammonia and carbon dioxide by the enzyme:
Answer» Urea is converted into ammonia and carbon dioxide by the enzyme:

Discussion

41.	Which pair of ions will have highest Ksp values of their sulphides. (1) Zn2+,Cu2+ (2) Pb2+,Hg2+ (3) Zn2+,Mn2+ (4) Cd2+,Bi3+
Answer» Which pair of ions will have highest Ksp values of their sulphides. (1) ${Z n}^{2 +}, {C u}^{2 +}$ (2) ${P b}^{2 +}, {H g}^{2 +}$ (3) ${Z n}^{2 +}, {M n}^{2 +}$ (4) ${C d}^{2 +}, {B i}^{3 +}$

41.

Which pair of ions will have highest Ksp values of their sulphides. (1) Zn2+,Cu2+ (2) Pb2+,Hg2+ (3) Zn2+,Mn2+ (4) Cd2+,Bi3+

Answer»

Which pair of ions will have highest Ksp values of their sulphides.

(1) ${Z n}^{2 +}, {C u}^{2 +}$

(2) ${P b}^{2 +}, {H g}^{2 +}$

(3) ${Z n}^{2 +}, {M n}^{2 +}$

(4) ${C d}^{2 +}, {B i}^{3 +}$

Discussion

42.	Complete the table:
Answer» Complete the table:

Discussion

43.	What is the exact use of Order of magnitude? Where it is used? How does it help?
Answer» What is the exact use of Order of magnitude? Where it is used? How does it help?

Discussion

44.	For the chemical equilibrium, CaCO3(s) ⇌ CaO(s) + CO2(g),ΔH.,can be determined from which one of the following plots
Answer» For the chemical equilibrium, $C a C O_{3} (s) ⇌ C a O (s) + C O_{2} (g), Δ H^{.}$ ,can be determined from which one of the following plots

Discussion

45.	what is a solar panel
Answer» what is a solar panel

Discussion

46.	Which of the following is not a disproportionation reaction:
Answer» Which of the following is not a disproportionation reaction:

Discussion

47.	Which of the following compounds in these options have similar boiling points?
Answer» Which of the following compounds in these options have similar boiling points?

Discussion

48.	Q. What is Amagats law of partial volume ? Is it applicable for real gases
Answer» Q. What is Amagats law of partial volume ? Is it applicable for real gases

Discussion

49.	What is protonated alcohol
Answer» What is protonated alcohol

Discussion

50.	Write the molecular formula of pentane.
Answer» Write the molecular formula of pentane.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The solubility product of A2X3 is 1.08×10−23, its solubility will be:

Two substances A and B are present such that [A]=4[B] and half -life of A is 5 minute and of B is 15 minute . If they start decaying at the same time following first order, how much time later will the concentration of both of them would be same?

what is helmholtz colis?

22.What is the function is sie in orbital

4-methylphenol +CHCl3\xrightarrow{NaOH}salicyaldihyde + quinone derivative 4-methoxyphenol+CHCl3\overset{NaOH}{→ product (no quinone derivative)why} why different products are formed when OMe is replaced by -Me

What will be the concentration of H ion in a solution if potential of hydrogen electrode is -118.2mV? (pH2 is 1atm)

A compound contains 6.4% by mass of oxygen. It contains two moles of oxygen per mole of the compound. What is the molar mass of the compound?

Which of the following pairs represents anomers?

47.The density of every substance get increase when it is solidified but when water is converted into ice the density of ice is less then water why?

What is the pressure inside the drop of mercury of radius 3.00 mm at room temperature? Surface tension of mercury at that temperature (20°C) is 4.65 × 10–1 N m–1. The atmospheric pressure is 1.01 × 105 Pa. Also give the excess pressure inside the drop.

The pH of an aqueous solution at 25∘C having 0.1 M NaOH and 0.3 M to acetic acid (pKa = 4.76) would be nearly

73. The stable Oxidation state of Sulphur can be +2, still SF2 is not possible. Why?

The reagent(s) that can selectively precipitate S2− from a mixture of S2– and SO2−4 in aqueous solution is/are:

49. Wurtz reaction on a mixture of ethyl halide and isobutyl halide gives

8. Why conductivity of a solution does decreases with dilution

How does nabh4,lialh4 react with alpha-beta unstaurated 1)aldehyde 2) ketone with provide some exceptions?separtely for aldehyde and ketone

Elements A and B do not form solid bicarbonate but react with N2 to give nitrides. Which of the following can be A and B?

Find the total number of acyclic structural isomers of molecular formula C4H6.

why the freezing point of a solution is less than the pure solvent?

Which of the following statement is true ?

For gas 'A in a calorimeter heat evolved is 250 kJ/mol.For 0.2 mol of A, temperature rise from 298 K to300 K. Find out heat capacity of calorimeter:-(1) 12.5 kJ/K(3) 50 kJ/K(2) 25 kJ/K(4) 100 kJ/K

Calculate the entropy change ( in J K−1) when 220 g of Carbon dioxide expands reversibly and isothermally from an initial volume of 1 litre to 100 litre at 600 K.

What is coordinate bond? Explain it brief

Which of the following compound will most readily give a cyclic product when treated with a base?

in the formula for finding the no of moles we need to keep in mind the molar mass of the molecule or it would be given to us?

According to Heisenberg's uncertainty principle:

limx->1(ax^2+bx+c/cx^2+bx+a)

20.HLA is also a multiple allele Then for that what is the value of n? i.e value of multiple alleles?

What is imaginary - Resonance structures or resonance hybrid? Why?

38. A gaseous mixture contains oxygen and nitrogen in the ratio of 1 : 16 by mass. The ratio of their respective number of molecules is ??

If an electron is placed in an uniform external electric field, then what is the path of the electron?

The Mass percentage of nitrogen in histamine is

Which of the following is/are electrophile?

Natural rubber has

In the question arrange the compounds in increasing order of rate of reaction towards nucleophilic substitution. (a) (i) &lt; (ii) &lt; (iii) (b) (ii) &lt; (i) &lt; (iii) (c) (iii) &lt; (ii) &lt; (i) (d) (i) &lt; (iii) &lt; (ii)

33. A certain sample of gas has a volume of 0.2 litre measured at 1 atm pressure and 0 degree Celsius. At the same pressure, but at 273 degree Celsius it's volume will be?

Which one of the following group represent 2-D silicate?

In the following reactions, The major products (A) and (C) are respectively:

28.WHEN WE HAVE TO FIND ENTHALPY OF A REACTION, WE USE ENHALY OF FORMATION OF REACTANT AND PRODUCT ,THAT IS SUM OF ENTHAPLY OF FORMATION OF PRODUCT - SUM OF ENTHALPY OF FORMATION OF REACTANT / WHAT IS THE RELATIO BTW THE TWO TYPES OF ENTHALPY , DUE TO WHICH WE DO SO ??

Urea is converted into ammonia and carbon dioxide by the enzyme:

Which pair of ions will have highest Ksp values of their sulphides. (1) Zn2+,Cu2+ (2) Pb2+,Hg2+ (3) Zn2+,Mn2+ (4) Cd2+,Bi3+

Complete the table:

What is the exact use of Order of magnitude? Where it is used? How does it help?

For the chemical equilibrium, CaCO3(s) ⇌ CaO(s) + CO2(g),ΔH.,can be determined from which one of the following plots

what is a solar panel

Which of the following is not a disproportionation reaction:

Which of the following compounds in these options have similar boiling points?

Q. What is Amagats law of partial volume ? Is it applicable for real gases

What is protonated alcohol

Write the molecular formula of pentane.

In the question arrange the compounds in increasing order of rate of reaction towards nucleophilic substitution. (a) (i) < (ii) < (iii) (b) (ii) < (i) < (iii) (c) (iii) < (ii) < (i) (d) (i) < (iii) < (ii)