46295 + Interview Questions in Chemistry

1.	How did jj thomson arrive at the conclusion that matter was made of electrons
Answer» How did jj thomson arrive at the conclusion that matter was made of electrons

Discussion

2.	Which among the following are the repulsive forces acting between two atoms A and B? If eA, eB represents electrons of atom A and B respectively and NA, NB represents nuclei of atom A and B respectively.
Answer» Which among the following are the repulsive forces acting between two atoms A and B? If $e_{A}$ , $e_{B}$ represents electrons of atom A and B respectively and $N_{A}$ , $N_{B}$ represents nuclei of atom A and B respectively.

Discussion

3.	The kinetic energy of an electron is 9.1×10−25 J. Calculate the de Broglie wavelength for the same. (Planck's constant,h=6.6×10−34 Js, mass of electron=9.1×10−31 kg)
Answer» The kinetic energy of an electron is $9.1 \times 10^{- 25} J$ . Calculate the de Broglie wavelength for the same. $(Planck's constant, h = 6.6 \times 10^{- 34} J s, mass of electron = 9.1 \times 10^{- 31} k g)$

Discussion

4.	The reaction of primary amine with Chloroform and ethanoic solution of KOH is called:
Answer» The reaction of primary amine with Chloroform and ethanoic solution of KOH is called:

Discussion

5.	Among the following molecules which one have smallest bond angle-
Answer» Among the following molecules which one have smallest bond angle-

Discussion

6.	[Ti(NCS)6]3− ion exhibits a single absorption band at 544 nm. What will be the crystal field splitting energy (in kJ/mol) of the complex ?(h=6.626×10−34 J s;c=3×108 m/s;NA=6.02×1023 ions/mole)
Answer» $[T i (N C S)_{6}]^{3 -}$ ion exhibits a single absorption band at 544 nm. What will be the crystal field splitting energy (in kJ/mol) of the complex ? $(h = 6.626 \times 10^{- 34} J s; c = 3 \times 10^{8} m / s; N_{A} = 6.02 \times 10^{23} i o n s / m o l e)$

Discussion

7.	sir what is markoffins rule and anti markoffins rule i dont understand
Answer» sir what is markoffins rule and anti markoffins rule i dont understand

Discussion

8.	The activation energy for a reaction at temperature T K was found to be 2.303 RT J mol−1. The ratio of the rate constant to Arrhenius factor is :
Answer» The activation energy for a reaction at temperature T K was found to be 2.303 RT J $m o l^{- 1}$ . The ratio of the rate constant to Arrhenius factor is :

Discussion

9.	How to calculate the valence on hydrogen scale and oxygen scale(with example)please..
Answer» How to calculate the valence on hydrogen scale and oxygen scale(with example)please..

Discussion

10.	For a given reversible reaction if the concentrations of the reactants are quadrupled, the equilibrium constant will be
Answer» For a given reversible reaction if the concentrations of the reactants are quadrupled, the equilibrium constant will be

Discussion

11.	Alkanes, alkenes, alkynes, alcohol, phenol, ether, ester, aldehyde, ketone, acid pls arrange in the sequence of increasing oxidation number. ( If one compound were to be transformed into the other
Answer» Alkanes, alkenes, alkynes, alcohol, phenol, ether, ester, aldehyde, ketone, acid pls arrange in the sequence of increasing oxidation number. ( If one compound were to be transformed into the other

Discussion

12.	Which of the following statement is true for a thermodynamical system where ∆U is the increase in internal energy and ∆W work done respectively?
Answer» Which of the following statement is true for a thermodynamical system where ∆U is the increase in internal energy and ∆W work done respectively?

Discussion

13.	Scientist who performed experiment for the prediction of origin of life by using CH4, NH3, H2O and H2 was:
Answer» Scientist who performed experiment for the prediction of origin of life by using CH₄, NH₃, H₂O and H₂ was:

Discussion

14.	In CO2, hybridization of carbon is:
Answer» In $C O_{2}$ , hybridization of carbon is:

Discussion

15.	In a solid lattice, the cation has left a lattice site and is located at interstitial position, the lattice defect is:
Answer» In a solid lattice, the cation has left a lattice site and is located at interstitial position, the lattice defect is:

Discussion

16.	Which of the following has the same molecular weight and equivalent weight
Answer» Which of the following has the same molecular weight and equivalent weight

Discussion

17.	The hydrated salt Na2CO3.xH2O undergoes 63% loss in mass on heating and becomes anhydrous. The value of x is: (report the answer to the closest integer)
Answer» The hydrated salt $N a_{2} C O_{3} . x H_{2} O$ undergoes $63 %$ loss in mass on heating and becomes anhydrous. The value of $x$ is: (report the answer to the closest integer)

Discussion

18.	An ether is more volatile than alcohol having the same molecular formula. This is due to
Answer» An ether is more volatile than alcohol having the same molecular formula. This is due to

Discussion

19.	The electonic configuration of four different elements is given below. Identify the group 14 element among these
Answer» The electonic configuration of four different elements is given below. Identify the group 14 element among these

Discussion

20.	Find the ratio of areas of two circles if they have a radius as 5 and 3 respectively. [3 MARKS]
Answer» Find the ratio of areas of two circles if they have a radius as 5 and 3 respectively. [3 MARKS]

Discussion

21.	Carbogen is
Answer» Carbogen is

Discussion

22.	Atomicity of white or yellow phosphorus is 4 and it forms a molecule −P4. Calculate the value of the expression x.yz, where: x: Total number of vertex angles in P4 molecule y: Total number of lone pairs in P4 molecule z: Total number of P−P bonds in P4 molecule
Answer» Atomicity of white or yellow phosphorus is 4 and it forms a molecule $- P_{4}$ . Calculate the value of the expression $\frac{x . y}{z}$ , where: $x$ : Total number of vertex angles in $P_{4}$ molecule $y$ : Total number of lone pairs in $P_{4}$ molecule $z$ : Total number of $P - P$ bonds in $P_{4}$ molecule

Discussion

23.	At room temperature the average speed of Helium is higher than that of Oxygen by a factor of
Answer» At room temperature the average speed of Helium is higher than that of Oxygen by a factor of

Discussion

24.	The increasing order of atomic radii of the following group 13 elements is
Answer» The increasing order of atomic radii of the following group 13 elements is

Discussion

25.	Butyne-1 and Butene-1 can be distinguished by
Answer» Butyne-1 and Butene-1 can be distinguished by

Discussion

26.	x grams of CaCO3 was completely decomposed. The mass of the solid residue formed is 28 g. What is the value of ‘x’ in grams?
Answer» x grams of $C a C O_{3}$ was completely decomposed. The mass of the solid residue formed is $28 g$ . What is the value of ‘x’ in grams?

Discussion

27.	The mole fraction of methanol in water is 0.12. Calculate its molality.
Answer» The mole fraction of methanol in water is $0.12$ . Calculate its molality.

Discussion

28.	CH3−CH2−CH2−C≡CHLiNH2−−−−→A(CH3)2SO4−−−−−−−→B
Answer» $C H_{3} - C H_{2} - C H_{2} - C \equiv C H L i N H_{2} - --- \to A (C H_{3})_{2} S O_{4} - ------ \to B$

Discussion

29.	1120 mL of ozonized oxygen at S.T.P. weigh 1.76 g. Calculate the volume (in mL) of oxygen in the ozonized oxygen.
Answer» $1120 mL$ of ozonized oxygen at S.T.P. weigh $1.76 g$ . Calculate the volume (in mL) of oxygen in the ozonized oxygen.

Discussion

30.	The longest wavelength (in cm) of light that is required to remove an electron from n = 2 orbit of hydrogen atom is y×10−8 m. What is the value of y?
Answer» The longest wavelength (in cm) of light that is required to remove an electron from n = 2 orbit of hydrogen atom is $y \times 10^{- 8}$ m. What is the value of y?

Discussion

31.	2 moles of PCl5 were heated in a closed vessel of 2 litre capacity. At equilibrium, 40% of PCl5 is dissociated into PCl3 and Cl2. The value of equilibrium constant is
Answer» 2 moles of $P C l_{5}$ were heated in a closed vessel of 2 litre capacity. At equilibrium, 40% of $P C l_{5}$ is dissociated into $P C l_{3}$ and $C l_{2}$ . The value of equilibrium constant is

31.

2 moles of PCl5 were heated in a closed vessel of 2 litre capacity. At equilibrium, 40% of PCl5 is dissociated into PCl3 and Cl2. The value of equilibrium constant is

Answer»

2 moles of $P C l_{5}$ were heated in a closed vessel of 2 litre capacity. At

equilibrium, 40% of $P C l_{5}$ is dissociated into $P C l_{3}$ and $C l_{2}$ . The value of

equilibrium constant is

Discussion

32.	A piston fitted cylinder has a volume of 4 L. This has a mixture of gases along with an aqueous tension, but no liquid water is present. When the piston is moved and the volume becomes 2 L, the total pressure is found to be 15 atm. When the piston is further moved to compress the gas to a volume of 1 L, the total pressure is found to be 29 atm. What will be the total pressure inside the cylinder if the piston expands to a volume of 8 L? (Assume no volume change due to the condensed liquid if any)
Answer» A piston fitted cylinder has a volume of 4 L. This has a mixture of gases along with an aqueous tension, but no liquid water is present. When the piston is moved and the volume becomes 2 L, the total pressure is found to be 15 atm. When the piston is further moved to compress the gas to a volume of 1 L, the total pressure is found to be 29 atm. What will be the total pressure inside the cylinder if the piston expands to a volume of 8 L? (Assume no volume change due to the condensed liquid if any)

Discussion

33.	Choose the incorrect order of basic strengths of given amines in aqueous phase.
Answer» Choose the incorrect order of basic strengths of given amines in aqueous phase.

Discussion

34.	Polyphosphates are used as water softening agents because they
Answer» Polyphosphates are used as water softening agents because they

34.

Polyphosphates are used as water softening agents because they

Answer»

Polyphosphates are used as water softening agents because they

Discussion

35.	Potassium permanganate acts as an oxidising agent in acidic medium. The number of moles of potassium permanganate that will be needed to react with one mole of sulphide ions in acidic solution is
Answer» Potassium permanganate acts as an oxidising agent in acidic medium. The number of moles of potassium permanganate that will be needed to react with one mole of sulphide ions in acidic solution is

Discussion

36.	To synthesize the given compound via an SN2 reaction, which of the following options is appropriate:
Answer» To synthesize the given compound via an $S_{N} 2$ reaction, which of the following options is appropriate:

Discussion

37.	For which type of reactions, order and molecularity have the same value?
Answer» For which type of reactions, order and molecularity have the same value?

Discussion

38.	Two rods of equal length and area of cross-section are connected in parallel between temperatures 200C and 800C . If ratio of their thermal conductivities is 3:4,then the ratio of the effective thermal conductivity to that of the first rod thermal conductivity is
Answer» Two rods of equal length and area of cross-section are connected in parallel between temperatures $20^{0} C a n d 80^{0} C$ . If ratio of their thermal conductivities is 3:4,then the ratio of the effective thermal conductivity to that of the first rod thermal conductivity is

Discussion

39.	What are Molarity and molality represented by respectively?
Answer» What are Molarity and molality represented by respectively?

Discussion

40.	In the compound, Lithium tetrahydridoaluminate the ligand is
Answer» In the compound, Lithium tetrahydridoaluminate the ligand is

Discussion

41.	Which of the following molecules is not an odd electron species?
Answer» Which of the following molecules is not an odd electron species?

Discussion

42.	Among the gases (i) – (v), the gases that cause greenhouse effect are: i. CO2 ii.H2O iii. CFC iv. O2 v. O3
Answer» Among the gases (i) – (v), the gases that cause greenhouse effect are: i. $C O_{2}$ ii. $H_{2} O$ iii. $C F C$ iv. $O_{2}$ v. $O_{3}$

Discussion

43.	The compound that gives the most stable carbonium ion on dehydration is:
Answer» The compound that gives the most stable carbonium ion on dehydration is:

Discussion

44.	What mass of calcium chloride should be added to 300 ml of water to prepare 2.46 m solution?
Answer» What mass of calcium chloride should be added to 300 ml of water to prepare 2.46 m solution?

Discussion

45.	Butyric acid is an organic compound containing only C, H and O and is a component of rancid butter. If 0.44 g of butyric acid is burnt in excess oxygen, it yields 0.88 g of CO2 and 0.36 g of water as the only products. The empirical formula of butyric acid is:
Answer» Butyric acid is an organic compound containing only C, H and O and is a component of rancid butter. If 0.44 g of butyric acid is burnt in excess oxygen, it yields 0.88 g of $C O_{2}$ and 0.36 g of water as the only products. The empirical formula of butyric acid is:

Discussion

46.	Given: Which of the given compounds can exhibit tautomerism ?
Answer» Given: Which of the given compounds can exhibit tautomerism ?

46.

Given: Which of the given compounds can exhibit tautomerism ?

Answer»

Given:

Which of the given compounds can exhibit tautomerism ?

Discussion

47.	What is the empirical formula of vanadium oxide, if 2.74 g of the metal oxide contains 1.53 g of metal ? (Molar Mass of Vanadium = 52 g)
Answer» What is the empirical formula of vanadium oxide, if $2.74 g$ of the metal oxide contains $1.53 g$ of metal ? (Molar Mass of Vanadium = 52 g)

Discussion

48.	Among the following, the wrong statement is
Answer» Among the following, the wrong statement is

Discussion

49.	The dihedral angle between the two methyl groups in gauche conformation of n-butane is:
Answer» The dihedral angle between the two methyl groups in gauche conformation of n-butane is:

Discussion

50.	The states of hybridisation of boron and oxygen in H3BO3 are respectively
Answer» The states of hybridisation of boron and oxygen in $H_{3} B O_{3}$ are respectively

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

How did jj thomson arrive at the conclusion that matter was made of electrons

Which among the following are the repulsive forces acting between two atoms A and B? If eA, eB represents electrons of atom A and B respectively and NA, NB represents nuclei of atom A and B respectively.

The kinetic energy of an electron is 9.1×10−25 J. Calculate the de Broglie wavelength for the same. (Planck's constant,h=6.6×10−34 Js, mass of electron=9.1×10−31 kg)

The reaction of primary amine with Chloroform and ethanoic solution of KOH is called:

Among the following molecules which one have smallest bond angle-

[Ti(NCS)6]3− ion exhibits a single absorption band at 544 nm. What will be the crystal field splitting energy (in kJ/mol) of the complex ?(h=6.626×10−34 J s;c=3×108 m/s;NA=6.02×1023 ions/mole)

sir what is markoffins rule and anti markoffins rule i dont understand

The activation energy for a reaction at temperature T K was found to be 2.303 RT J mol−1. The ratio of the rate constant to Arrhenius factor is :

How to calculate the valence on hydrogen scale and oxygen scale(with example)please..

For a given reversible reaction if the concentrations of the reactants are quadrupled, the equilibrium constant will be

Alkanes, alkenes, alkynes, alcohol, phenol, ether, ester, aldehyde, ketone, acid pls arrange in the sequence of increasing oxidation number. ( If one compound were to be transformed into the other

Which of the following statement is true for a thermodynamical system where ∆U is the increase in internal energy and ∆W work done respectively?

Scientist who performed experiment for the prediction of origin of life by using CH4, NH3, H2O and H2 was:

In CO2, hybridization of carbon is:

In a solid lattice, the cation has left a lattice site and is located at interstitial position, the lattice defect is:

Which of the following has the same molecular weight and equivalent weight

The hydrated salt Na2CO3.xH2O undergoes 63% loss in mass on heating and becomes anhydrous. The value of x is: (report the answer to the closest integer)

An ether is more volatile than alcohol having the same molecular formula. This is due to

The electonic configuration of four different elements is given below. Identify the group 14 element among these

Find the ratio of areas of two circles if they have a radius as 5 and 3 respectively. [3 MARKS]

Carbogen is

Atomicity of white or yellow phosphorus is 4 and it forms a molecule −P4. Calculate the value of the expression x.yz, where: x: Total number of vertex angles in P4 molecule y: Total number of lone pairs in P4 molecule z: Total number of P−P bonds in P4 molecule

At room temperature the average speed of Helium is higher than that of Oxygen by a factor of

The increasing order of atomic radii of the following group 13 elements is

Butyne-1 and Butene-1 can be distinguished by

x grams of CaCO3 was completely decomposed. The mass of the solid residue formed is 28 g. What is the value of ‘x’ in grams?

The mole fraction of methanol in water is 0.12. Calculate its molality.

CH3−CH2−CH2−C≡CHLiNH2−−−−→A(CH3)2SO4−−−−−−−→B

1120 mL of ozonized oxygen at S.T.P. weigh 1.76 g. Calculate the volume (in mL) of oxygen in the ozonized oxygen.

The longest wavelength (in cm) of light that is required to remove an electron from n = 2 orbit of hydrogen atom is y×10−8 m. What is the value of y?

2 moles of PCl5 were heated in a closed vessel of 2 litre capacity. At equilibrium, 40% of PCl5 is dissociated into PCl3 and Cl2. The value of equilibrium constant is

Choose the incorrect order of basic strengths of given amines in aqueous phase.

Polyphosphates are used as water softening agents because they

Potassium permanganate acts as an oxidising agent in acidic medium. The number of moles of potassium permanganate that will be needed to react with one mole of sulphide ions in acidic solution is

To synthesize the given compound via an SN2 reaction, which of the following options is appropriate:

For which type of reactions, order and molecularity have the same value?

Two rods of equal length and area of cross-section are connected in parallel between temperatures 200C and 800C . If ratio of their thermal conductivities is 3:4,then the ratio of the effective thermal conductivity to that of the first rod thermal conductivity is

What are Molarity and molality represented by respectively?

In the compound, Lithium tetrahydridoaluminate the ligand is

Which of the following molecules is not an odd electron species?

Among the gases (i) – (v), the gases that cause greenhouse effect are: i. CO2 ii.H2O iii. CFC iv. O2 v. O3

The compound that gives the most stable carbonium ion on dehydration is:

What mass of calcium chloride should be added to 300 ml of water to prepare 2.46 m solution?

Butyric acid is an organic compound containing only C, H and O and is a component of rancid butter. If 0.44 g of butyric acid is burnt in excess oxygen, it yields 0.88 g of CO2 and 0.36 g of water as the only products. The empirical formula of butyric acid is:

Given: Which of the given compounds can exhibit tautomerism ?

What is the empirical formula of vanadium oxide, if 2.74 g of the metal oxide contains 1.53 g of metal ? (Molar Mass of Vanadium = 52 g)

Among the following, the wrong statement is

The dihedral angle between the two methyl groups in gauche conformation of n-butane is:

The states of hybridisation of boron and oxygen in H3BO3 are respectively