46295 + Interview Questions in Chemistry

1.	The ionic radius of the ions having same charge of d block elements in a given series:
Answer» The ionic radius of the ions having same charge of d block elements in a given series:

Discussion

2.	The rate of a first order reaction is 0.04 mol L−1min−1 at 10 minutes and 0.02 mol L−1min−1 at 20 minutes. Find the half-life of the reaction (in min).(Given:ln2=0.693)
Answer» The rate of a first order reaction is $0.04 {mol L}^{- 1} {min}^{- 1}$ at $10 minutes$ and $0.02 {mol L}^{- 1} {min}^{- 1}$ at $20 minutes$ . Find the half-life of the reaction (in $min$ ). $(Given : ln 2 = 0.693)$

Discussion

3.	Wavelength of photon having energy 2 eV:
Answer» Wavelength of photon having energy 2 $e V$ :

Discussion

4.	5. Depression in freezing point of 1M urea, 1M NaCl, 1M CaCl2 are in the ratio of
Answer» 5. Depression in freezing point of 1M urea, 1M NaCl, 1M CaCl2 are in the ratio of

Discussion

5.	One mole of soda ash dissolves in water with evolution of 25 kJ of heat. Dissociation of 1 mol of the hydrate crystals in water resulted in the absorption of 67 kJ of heat. The heat released due to hydration of soda ash is
Answer» One mole of soda ash dissolves in water with evolution of 25 kJ of heat. Dissociation of 1 mol of the hydrate crystals in water resulted in the absorption of 67 kJ of heat. The heat released due to hydration of soda ash is

Discussion

6.	Why boiling point of cesium is higher than Rb?
Answer» Why boiling point of cesium is higher than Rb?

Discussion

7.	The correct order of increasing C−O bond length of CO,CO2−3 and CO2 is:
Answer» The correct order of increasing $C - O$ bond length of $C O, C O_{3}^{2 -} and C O_{2}$ is:

Discussion

8.	2.A first order reaction completed 60% in 20 minutes .The time required for completion of 90% of the reaction in approximately
Answer» 2.A first order reaction completed 60% in 20 minutes .The time required for completion of 90% of the reaction in approximately

Discussion

9.	34 Which product is formed when ethyne is treated with Na & liquid NH3 ?
Answer» 34 Which product is formed when ethyne is treated with Na & liquid NH3 ?

Discussion

10.	Atomic size ___ down the group. (increases/decreases)
Answer» Atomic size ___ down the group. (increases/decreases)

Discussion

11.	When aniline is treated with acetyl chloride in presence of anhydrous aluminium chloride, the main product is
Answer» When aniline is treated with acetyl chloride in presence of anhydrous aluminium chloride, the main product is

Discussion

12.	It is a pale yellow powder, but on exposure to moisture and CO2 it turns to white. What are we talking about?
Answer» It is a pale yellow powder, but on exposure to moisture and $C O_{2}$ it turns to white. What are we talking about?

Discussion

13.	What is the hybridisation of Cl in ClO2 ?Why ClO2 does not form dimer?
Answer» What is the hybridisation of Cl in ClO2 ?Why ClO2 does not form dimer?

Discussion

14.	Describe the process of purification of impure copper using electroplating.
Answer» Describe the process of purification of impure copper using electroplating.

Discussion

15.	Aluminate ion in aqueous solution actually exists as
Answer» Aluminate ion in aqueous solution actually exists as

Discussion

16.	29.The density of an aqueous solution of glucose is 1.8g/ml.The mass percent of glucose in it being 90%.The molarity of the solution will be? 1.9M 2.18M 3.15M 4.6M
Answer» 29.The density of an aqueous solution of glucose is 1.8g/ml.The mass percent of glucose in it being 90%.The molarity of the solution will be? 1.9M 2.18M 3.15M 4.6M

Discussion

17.	The IUPAC name of CH2=CHCHOH-CH2CHO is:
Answer» The IUPAC name of CH₂=CHCHOH-CH₂CHO is:

Discussion

18.	For a first order reaction2N2O5(g) → 2N2O4(g) + O2(g). If initial pressure of N2O5 is 2 atm then total pressure at t = t1/2 is
Answer» For a first order reaction 2N2O5(g) → 2N2O4(g) + O2(g). If initial pressure of N2O5 is 2 atm then total pressure at t = t1/2 is

Discussion

19.	The structure obtained when all the tetrahedral voids are occupied at a FCC structure is of the type:
Answer» The structure obtained when all the tetrahedral voids are occupied at a FCC structure is of the type:

Discussion

20.	In which of the following cases, the product of reductive ozonolysis has the same number of carbon atoms as in the reactant?
Answer» In which of the following cases, the product of reductive ozonolysis has the same number of carbon atoms as in the reactant?

Discussion

21.	For how much time 48 ampere current should be passed through 400ml 0.04M Ag NO3 solution during electrolysis so that Ag is completely deposited?
Answer» For how much time 48 ampere current should be passed through 400ml 0.04M Ag NO₃ solution during electrolysis so that Ag is completely deposited?

Discussion

22.	Concept relation and function in detail
Answer» Concept relation and function in detail

Discussion

23.	Which of the following curves represent(s) Boyle's law?
Answer» Which of the following curves represent(s) Boyle's law?

Discussion

24.	26.Where are trivalent atoms located in inverse spinel structure?
Answer» 26.Where are trivalent atoms located in inverse spinel structure?

Discussion

25.	Equivalent conductance at infinite dilutionBaCL (aq), H2SO4(aq) and HCI (aq) solutions are ab and c respectively. Molar conductance ofBaSO4(aq) is(1) (a + b -c) x 2 (2) (a + b -2c) x 2 ( 3) (a+b-c)/2 (4) (a+b-2c)/ 2
Answer» Equivalent conductance at infinite dilutionBaCL (aq), H2SO4(aq) and HCI (aq) solutions are ab and c respectively. Molar conductance ofBaSO4(aq) is(1) (a + b -c) x 2 (2) (a + b -2c) x 2 ( 3) (a+b-c)/2 (4) (a+b-2c)/ 2

Discussion

26.	N2O3, N2O5, P4O6, P4O7, H4P2O5, H2S2O3, H2S2O5Total number of compounds having at least one bridging oxo group among the molecules given above is
Answer» $N_{2} O_{3}, N_{2} O_{5}, P_{4} O_{6}, P_{4} O_{7}, H_{4} P_{2} O_{5}, H_{2} S_{2} O_{3}, H_{2} S_{2} O_{5}$ Total number of compounds having at least one bridging oxo group among the molecules given above is

Discussion

27.	When ethyl alcohol and acetic acid mixed together in equimolecular proportions, equilibrium is attained when two-third of the acid and alcohol are consumed. The equilibrium constant of the reaction will be
Answer» When ethyl alcohol and acetic acid mixed together in equimolecular proportions, equilibrium is attained when two-third of the acid and alcohol are consumed. The equilibrium constant of the reaction will be

Discussion

28.	In Bohr's model of the hydrogen atom the ratio between the period of revolution of an electron in the orbit of n=1 to the period of the revolution of the electron in the orbit n=3 is:
Answer» In Bohr's model of the hydrogen atom the ratio between the period of revolution of an electron in the orbit of $n = 1$ to the period of the revolution of the electron in the orbit $n = 3$ is:

Discussion

29.	Empirical formula of a compound is CH2. The mass of 1 litre of this gas is exactly equal to that of 1 litre of Nitrogen under similar conditions. Molecular formula of the gas is?
Answer» Empirical formula of a compound is $C H_{2}$ . The mass of 1 litre of this gas is exactly equal to that of 1 litre of Nitrogen under similar conditions. Molecular formula of the gas is?

Discussion

30.	Which one among, the following is the formula for Tincal?
Answer» Which one among, the following is the formula for Tincal?

Discussion

31.	Acetophenone can be obtained by the distillation of:
Answer» Acetophenone can be obtained by the distillation of:

Discussion

32.	Which of the following will be stable?
Answer» Which of the following will be stable?

Discussion

33.	The value of universal gas constant is 8.3 J/mole/K, the mean kinetic energy of 32 gm of oxygen at −73∘C will be
Answer» The value of universal gas constant is 8.3 J/mole/K, the mean kinetic energy of 32 gm of oxygen at $- 73^{\circ} C$ will be

Discussion

34.	In between (CH3)3CI and CH3F , which will undergo faster SN2 reaction ?
Answer» In between (CH₃)₃CI and CH₃F , which will undergo faster SN2 reaction ?

Discussion

35.	The coordination number of a metal crystallising in a simple cubic structure is
Answer» The coordination number of a metal crystallising in a simple cubic structure is

Discussion

36.	Q. A mixture of 2.3 g formic acid & 4.5 g oxalic acid is treated with conc. H2SO4. The evolved gaseous mixture is passed through KOH pellets. Weight (in gm) of the remaining product at STPwill be-1)1.42)3.03)4.44)2.8
Answer» Q. A mixture of 2.3 g formic acid & 4.5 g oxalic acid is treated with conc. H2SO4. The evolved gaseous mixture is passed through KOH pellets. Weight (in gm) of the remaining product at STP will be- 1)1.4 2)3.0 3)4.4 4)2.8

Discussion

37.	If this is Energy vs Dihedral angle graph of Butane, then I,II and III are respectively :
Answer» If this is Energy vs Dihedral angle graph of Butane, then I,II and III are respectively :

37.

If this is Energy vs Dihedral angle graph of Butane, then I,II and III are respectively :

Answer»

If this is Energy vs Dihedral angle graph of Butane, then I,II and III are respectively :

Discussion

38.	The compound(s) formed on combustion of sodium metal in excess air is/are:
Answer» The compound(s) formed on combustion of sodium metal in excess air is/are:

Discussion

39.	electronic configuration of anion in sodium hydride will be- ( a) 1S^2 (b) 1S^1 (c)1S^0 (d)1S^1 2S^1
Answer» electronic configuration of anion in sodium hydride will be- ( a) 1S^2 (b) 1S^1 (c)1S^0 (d)1S^1 2S^1

Discussion

40.	18 g of glucose (C6H12O6 is added to 178.2 g water. The vapour pressure of water (in torr) for this aqueous solution is: ( Give your answer upto one decimal only)
Answer» $18 g$ of glucose $(C_{6} H_{12} O_{6}$ is added to $178.2 g$ water. The vapour pressure of water (in torr) for this aqueous solution is: ( Give your answer upto one decimal only)

Discussion

41.	The weight of HIO3 formed on reaction of 2.54 g of I2 with concentrated HNO3 isOptions:Wrong 1.27 g2.54 g1.76 gShould have chosen 3.52 g
Answer» The weight of HIO3 formed on reaction of 2.54 g of I2 with concentrated HNO3 is Options: Wrong 1.27 g 2.54 g 1.76 g Should have chosen 3.52 g

Discussion

42.	why CHF3 and acetone does not form h bond
Answer» why CHF3 and acetone does not form h bond

Discussion

43.	total isomers of co(en2)cl2 will be
Answer» total isomers of co(en2)cl2 will be

Discussion

44.	The energies of an electron in the first orbit of He+ and in the third orbit of Li2+ in joule are respectively:
Answer» The energies of an electron in the first orbit of $H e^{+}$ and in the third orbit of $L i^{2 +}$ in joule are respectively:

Discussion

45.	Which of the following compound will make precipitate most readily with AgNO3 [CPMT 1992]
Answer» Which of the following compound will make precipitate most readily with AgNO₃ [CPMT 1992]

45.

Which of the following compound will make precipitate most readily with AgNO3 [CPMT 1992]

Answer»

Which of the following compound will make precipitate most readily with AgNO₃

[CPMT 1992]

Discussion

46.	The total number of contributing structures showing hyperconjugation (involving C-H bonds) for the following carbocation is
Answer» The total number of contributing structures showing hyperconjugation (involving C-H bonds) for the following carbocation is

Discussion

47.	The ratio of number of atoms present in 6.3 g ofSodium sulphite and 12.3 g of sulphurous acid is
Answer» The ratio of number of atoms present in 6.3 g ofSodium sulphite and 12.3 g of sulphurous acid is

Discussion

48.	What is the components of bile salt??
Answer» What is the components of bile salt??

Discussion

49.	if A+B= magnitude of A AND B THEN ANGLE BETWEEN A AND B is
Answer» if A+B= magnitude of A AND B THEN ANGLE BETWEEN A AND B is

Discussion

50.	The volume of 0.0618 mol of O2 obtained by decomposition of KCLO3 and collected by displacement of water of 428 ml at apressure of 754 mmHg at 25 celsius.The pressure of water vapour at 25 celsius
Answer» The volume of 0.0618 mol of O2 obtained by decomposition of KCLO3 and collected by displacement of water of 428 ml at a pressure of 754 mmHg at 25 celsius. The pressure of water vapour at 25 celsius

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The ionic radius of the ions having same charge of d block elements in a given series:

The rate of a first order reaction is 0.04 mol L−1min−1 at 10 minutes and 0.02 mol L−1min−1 at 20 minutes. Find the half-life of the reaction (in min).(Given:ln2=0.693)

Wavelength of photon having energy 2 eV:

5. Depression in freezing point of 1M urea, 1M NaCl, 1M CaCl2 are in the ratio of

One mole of soda ash dissolves in water with evolution of 25 kJ of heat. Dissociation of 1 mol of the hydrate crystals in water resulted in the absorption of 67 kJ of heat. The heat released due to hydration of soda ash is

Why boiling point of cesium is higher than Rb?

The correct order of increasing C−O bond length of CO,CO2−3 and CO2 is:

2.A first order reaction completed 60% in 20 minutes .The time required for completion of 90% of the reaction in approximately

34 Which product is formed when ethyne is treated with Na & liquid NH3 ?

Atomic size ___ down the group. (increases/decreases)

When aniline is treated with acetyl chloride in presence of anhydrous aluminium chloride, the main product is

It is a pale yellow powder, but on exposure to moisture and CO2 it turns to white. What are we talking about?

What is the hybridisation of Cl in ClO2 ?Why ClO2 does not form dimer?

Describe the process of purification of impure copper using electroplating.

Aluminate ion in aqueous solution actually exists as

29.The density of an aqueous solution of glucose is 1.8g/ml.The mass percent of glucose in it being 90%.The molarity of the solution will be? 1.9M 2.18M 3.15M 4.6M

The IUPAC name of CH2=CHCHOH-CH2CHO is:

For a first order reaction2N2O5(g) → 2N2O4(g) + O2(g). If initial pressure of N2O5 is 2 atm then total pressure at t = t1/2 is

The structure obtained when all the tetrahedral voids are occupied at a FCC structure is of the type:

In which of the following cases, the product of reductive ozonolysis has the same number of carbon atoms as in the reactant?

For how much time 48 ampere current should be passed through 400ml 0.04M Ag NO3 solution during electrolysis so that Ag is completely deposited?

Concept relation and function in detail

Which of the following curves represent(s) Boyle's law?

26.Where are trivalent atoms located in inverse spinel structure?

Equivalent conductance at infinite dilutionBaCL (aq), H2SO4(aq) and HCI (aq) solutions are ab and c respectively. Molar conductance ofBaSO4(aq) is(1) (a + b -c) x 2 (2) (a + b -2c) x 2 ( 3) (a+b-c)/2 (4) (a+b-2c)/ 2

N2O3, N2O5, P4O6, P4O7, H4P2O5, H2S2O3, H2S2O5Total number of compounds having at least one bridging oxo group among the molecules given above is

When ethyl alcohol and acetic acid mixed together in equimolecular proportions, equilibrium is attained when two-third of the acid and alcohol are consumed. The equilibrium constant of the reaction will be

In Bohr's model of the hydrogen atom the ratio between the period of revolution of an electron in the orbit of n=1 to the period of the revolution of the electron in the orbit n=3 is:

Empirical formula of a compound is CH2. The mass of 1 litre of this gas is exactly equal to that of 1 litre of Nitrogen under similar conditions. Molecular formula of the gas is?

Which one among, the following is the formula for Tincal?

Acetophenone can be obtained by the distillation of:

Which of the following will be stable?

The value of universal gas constant is 8.3 J/mole/K, the mean kinetic energy of 32 gm of oxygen at −73∘C will be

In between (CH​​​​​3)3CI and CH​​​​​3F , which will undergo faster SN2 reaction ?

The coordination number of a metal crystallising in a simple cubic structure is

Q. A mixture of 2.3 g formic acid & 4.5 g oxalic acid is treated with conc. H2SO4. The evolved gaseous mixture is passed through KOH pellets. Weight (in gm) of the remaining product at STPwill be-1)1.42)3.03)4.44)2.8

If this is Energy vs Dihedral angle graph of Butane, then I,II and III are respectively :

The compound(s) formed on combustion of sodium metal in excess air is/are:

electronic configuration of anion in sodium hydride will be- ( a) 1S^2 (b) 1S^1 (c)1S^0 (d)1S^1 2S^1

18 g of glucose (C6H12O6 is added to 178.2 g water. The vapour pressure of water (in torr) for this aqueous solution is: ( Give your answer upto one decimal only)

The weight of HIO3 formed on reaction of 2.54 g of I2 with concentrated HNO3 isOptions:Wrong 1.27 g2.54 g1.76 gShould have chosen 3.52 g

why CHF3 and acetone does not form h bond

total isomers of co(en2)cl2 will be

The energies of an electron in the first orbit of He+ and in the third orbit of Li2+ in joule are respectively:

Which of the following compound will make precipitate most readily with AgNO3 [CPMT 1992]

The total number of contributing structures showing hyperconjugation (involving C-H bonds) for the following carbocation is

The ratio of number of atoms present in 6.3 g ofSodium sulphite and 12.3 g of sulphurous acid is

What is the components of bile salt??

if A+B= magnitude of A AND B THEN ANGLE BETWEEN A AND B is

The volume of 0.0618 mol of O2 obtained by decomposition of KCLO3 and collected by displacement of water of 428 ml at apressure of 754 mmHg at 25 celsius.The pressure of water vapour at 25 celsius

In between (CH3)3CI and CH3F , which will undergo faster SN2 reaction ?