46295 + Interview Questions in Chemistry

1.	What is the value of 1÷17
Answer» What is the value of 1÷17

Discussion

2.	A metal carbonate (0.5kg) gives 0.28kg of ita oxide on heating .Hence ,the equivalent weight of metal is (1)20g/eq (2)40g/eq (3)25g/eq (4)30g/e
Answer» A metal carbonate (0.5kg) gives 0.28kg of ita oxide on heating .Hence ,the equivalent weight of metal is (1)20g/eq (2)40g/eq (3)25g/eq (4)30g/e

Discussion

3.	how to calculate mass of electron in amu
Answer» how to calculate mass of electron in amu

Discussion

4.	Find the ratio of molecule and atom separately in equal weight of Ch4 and so3
Answer» Find the ratio of molecule and atom separately in equal weight of Ch4 and so3

Discussion

5.	60. If the density of methrol is 0.8 kgl/L.what is the volume needed for making 2.5 L of its 0.4M solution?
Answer» 60. If the density of methrol is 0.8 kgl/L.what is the volume needed for making 2.5 L of its 0.4M solution?

Discussion

6.	what is MABCD type?
Answer» what is MABCD type?

Discussion

7.	The precursor carbocation to the product in the following reaction is
Answer» The precursor carbocation to the product in the following reaction is

Discussion

8.	Which order is true for resonance energy?
Answer» Which order is true for resonance energy?

Discussion

9.	Reduction of carbonyl group into –CH2 in presence of Zn-Hg/HCl is an example of:
Answer» Reduction of carbonyl group into –CH₂ in presence of Zn-Hg/HCl is an example of:

Discussion

10.	Bond order of I3-
Answer» Bond order of I3-

Discussion

11.	Why are metals malleable ?
Answer» Why are metals malleable ?

Discussion

12.	If aluminium crystallises in cubic packed structure, and it's radius is 125pm then find Number of unit cells of aluminium in 1.0cm cube
Answer» If aluminium crystallises in cubic packed structure, and it's radius is 125pm then find Number of unit cells of aluminium in 1.0cm cube

Discussion

13.	what are beta-carotenes? how are they converted to retinol?
Answer» what are beta-carotenes? how are they converted to retinol?

Discussion

14.	A sample of uranium rock from moon contains equimolar amounts of U238 and Pb206. The age of the rock will be (t12for U238=4.5×109yrs)
Answer» A sample of uranium rock from moon contains equimolar amounts of $U^{238}$ and $P b^{206}$ . The age of the rock will be $(t_{\frac{1}{2}} f o r U^{238} = 4.5 \times 10^{9} y r s)$

Discussion

15.	ch3coch2ch2ch2ch2coch3 +NaOH
Answer» ch3coch2ch2ch2ch2coch3 +NaOH

Discussion

16.	What is the correct sequence of reagents used for coverting nitrobenzene into m-dibromobenzene?
Answer» What is the correct sequence of reagents used for coverting nitrobenzene into m-dibromobenzene?

Discussion

17.	Explain how vacancies are introduced in an ionic solid when a cation of higher valence is added as an impurity in it.
Answer» Explain how vacancies are introduced in an ionic solid when a cation of higher valence is added as an impurity in it.

Discussion

18.	1.4g of a sample of chalk containing clay as impurity were treated with excess of did hcl . Volume of co2 evolved when measured at 15^°c 768mm pressure was 282 cm .calculate the percentage purity of sample.
Answer» 1.4g of a sample of chalk containing clay as impurity were treated with excess of did hcl . Volume of co2 evolved when measured at 15^°c 768mm pressure was 282 cm .calculate the percentage purity of sample.

Discussion

19.	It is given that when (±)-2,3-dibromobutane reacts with KOH, some of the products formed are: Explain via mechanism and then choose the correct ones from the following.
Answer» It is given that when (±)-2,3-dibromobutane reacts with $K O H$ , some of the products formed are: Explain via mechanism and then choose the correct ones from the following.

19.

It is given that when (±)-2,3-dibromobutane reacts with KOH, some of the products formed are: Explain via mechanism and then choose the correct ones from the following.

Answer»

It is given that when (±)-2,3-dibromobutane reacts with $K O H$ , some of the products formed are:

Explain via mechanism and then choose the correct ones from the following.

Discussion

20.	Is ,a homopolymer or copolymer?
Answer» Is , a homopolymer or copolymer?

Discussion

21.	If M0 is the mass of an oxygen isotope 8O17. MP and MN are the mass of a proton and a neutron respectively, the nuclear binding energy of the isotope is
Answer» If $M_{0}$ is the mass of an oxygen isotope $_{8} O^{17}$ . $M_{P}$ and $M_{N}$ are the mass of a proton and a neutron respectively, the nuclear binding energy of the isotope is

Discussion

22.	Which one is formed when sodium phenoxide is heated with ethyl iodide a) phenetole b) ethyl phenyl alcohol c) phenol d) none of these
Answer» Which one is formed when sodium phenoxide is heated with ethyl iodide a) phenetole b) ethyl phenyl alcohol c) phenol d) none of these

Discussion

23.	22. Kc= 4.24 at 800k for co(g)+H2O------> CO2+H2 calculate equilibrium conc. For all if initial conc. Of CO & H2O is 0.10M
Answer» 22. Kc= 4.24 at 800k for co(g)+H2O------> CO2+H2 calculate equilibrium conc. For all if initial conc. Of CO & H2O is 0.10M

Discussion

24.

Following chemical species were reported for water sample from a well SpeciesConcentration (milliequivalent/L)Chloride (Cl−)15Sulphate (SO2−4)15Carbonate (CO2−3)05Bicarbonate (HCO−3)30Calcium (Ca2+)12Magnesium (Mg2+)18pH8.5Alkalinity present in the water in mg/L as CaCO3

Answer»

Following chemical species were reported for water sample from a well

Species	Concentration (milliequivalent/L)
Chloride $(C l^{-})$	15
Sulphate $(S O_{4}^{2 -})$	15
Carbonate $(C O_{3}^{2 -})$	05
Bicarbonate $(H C O_{3}^{-})$	30
Calcium $(C a^{2 +})$	12
Magnesium $(M g^{2 +})$	18
$p H$	8.5

Alkalinity present in the water in mg/L as $C a C O_{3}$

Discussion

25.	Nodal surfaces of an orbital can be of two types viz. angularnodes and radial nodes. Out of the following, select thesubshell in which orbital(s) can have non-planar angular nodes.3s3p3d4p
Answer» Nodal surfaces of an orbital can be of two types viz. angular nodes and radial nodes. Out of the following, select the subshell in which orbital(s) can have non-planar angular nodes. 3s 3p 3d 4p

Discussion

26.	The number of products possible for x (including stereomers)in the following reaction is:___
Answer» The number of products possible for x (including stereomers)in the following reaction is:___

Discussion

27.	bond angle of NH4^+ is higher than that oh PH3,why?
Answer» bond angle of NH4^+ is higher than that oh PH3,why?

Discussion

28.	In which of the following pairs of resonating structures first resonating structure is more contributing toward resonance hybrid than second?
Answer» In which of the following pairs of resonating structures first resonating structure is more contributing toward resonance hybrid than second?

Discussion

29.	2MnO−4+bC2O2−4+cH+→xMn2++yCO2+zH2OIf the above equation is balanced with integer coefficients, the value of c is ......(Round off to the nearest Integer)
Answer» $2 M n O_{4}^{-} + b C_{2} O_{4}^{2 -} + c H^{+} \to x M n^{2 +} + y C O_{2} + z H_{2} O$ If the above equation is balanced with integer coefficients, the value of c is ...... (Round off to the nearest Integer)

Discussion

30.	Among the following, the number of metal/s which can be used as electrodes in the photoelectric cell is:(a) Li(b) Na(c) Rb(d) Cs
Answer» Among the following, the number of metal/s which can be used as electrodes in the photoelectric cell is: (a) Li (b) Na (c) Rb (d) Cs

Discussion

31.	Calculate the molality of a solution that contains 51.2g of naphthalene (C 10 H 8 ) in 500mL of carbon tetrachloride. The density of CCl 4 is 1.60g/mL
Answer» Calculate the molality of a solution that contains 51.2g of naphthalene (C 10 H 8 ) in 500mL of carbon tetrachloride. The density of CCl 4 is 1.60g/mL

Discussion

32.	Hydrolysis of borax by diagrams
Answer» Hydrolysis of borax by diagrams

Discussion

33.	two mass of 2m and m are whirled in a horizontal circle.the radius of path of 2m is r and of m is 2r then the ratio of tention of two strings ar
Answer» two mass of 2m and m are whirled in a horizontal circle.the radius of path of 2m is r and of m is 2r then the ratio of tention of two strings ar

Discussion

34.	What are Lorentz's laws??
Answer» What are Lorentz's laws??

Discussion

35.	If in a container neither mass and nor heat exchange occurs then it constitutes a
Answer» If in a container neither mass and nor heat exchange occurs then it constitutes a

Discussion

36.	what is antineutrino particle ?
Answer» what is antineutrino particle ?

Discussion

37.	Why in the structure of XeOF4 , oxygen has a double bond?
Answer» Why in the structure of XeOF4 , oxygen has a double bond?

Discussion

38.	Explain the fact that in aryl alkyl ethers The alkoxy group activates the benzene ring towards electrophilic substitution. It directs the incoming substituents to ortho and para positions in benzene ring.
Answer» Explain the fact that in aryl alkyl ethers The alkoxy group activates the benzene ring towards electrophilic substitution. It directs the incoming substituents to ortho and para positions in benzene ring.

38.

Explain the fact that in aryl alkyl ethers The alkoxy group activates the benzene ring towards electrophilic substitution. It directs the incoming substituents to ortho and para positions in benzene ring.

Answer»

Explain the fact that in aryl alkyl ethers
The alkoxy group activates the benzene ring towards electrophilic substitution.

It directs the incoming substituents to ortho and para positions in benzene ring.

Discussion

39.	RbO2 is
Answer» $R b O_{2}$ is

Discussion

40.	The structure of the product formed in the reaction given below is:
Answer» The structure of the product formed in the reaction given below is:

Discussion

41.	Which of the following has net dipole moment?
Answer» Which of the following has net dipole moment?

Discussion

42.	HOW MANY S-S BONDS , S-O-S BONDS , SIGMA BONDS , PI BONDS ARE PRESENT IN TRIMER OF SULPHAR TRIOXIDE
Answer» HOW MANY S-S BONDS , S-O-S BONDS , SIGMA BONDS , PI BONDS ARE PRESENT IN TRIMER OF SULPHAR TRIOXIDE

Discussion

43.	What is the condensed formula of propane?
Answer» What is the condensed formula of propane?

Discussion

44.	Isomers have
Answer» Isomers have

Discussion

45.	Write the unit of equilibrium constant (Kc) for the given reaction. C(s)+12O2(g)→CO2(g)
Answer» Write the unit of equilibrium constant $(K_{c})$ for the given reaction. $C (s) + \frac{1}{2} O_{2} (g) \to C O_{2} (g)$

Discussion

46.	At ordinary temperature the surface of metals, such as magnesium, aluminium, zinc, lead etc. do not undergo oxidation. Give reason.
Answer» At ordinary temperature the surface of metals, such as magnesium, aluminium, zinc, lead etc. do not undergo oxidation. Give reason.

Discussion

47.	What is the colour of ferrous sulphate salt?
Answer» What is the colour of ferrous sulphate salt?

Discussion

48.	Considerthe following reaction sequence C6H1Cl\xrightarrow[{ether }]{Mg}A\xrightarrow[{H3O+}]{Co2}B\xrightarrow[{H2So4}]{C2H5OH}C(major)
Answer» Considerthe following reaction sequence C6H1Cl\xrightarrow[{ether }]{Mg}A\xrightarrow[{H3O+}]{Co2}B\xrightarrow[{H2So4}]{C2H5OH}C(major)

Discussion

49.	For which organic molecule do we use the term 'acetylene' ? Is 'ethylene' also used for thesame particular compound ?
Answer» For which organic molecule do we use the term 'acetylene' ? Is 'ethylene' also used for the same particular compound ?

Discussion

50.

Which statements are correct ? i) physical adsorption is due to Vander Waal’s forces ii) physical adsorption decreases at high temperature iii) physical adsorption is irreversible iv) enthalpy for a chemical adsorption is generally lesser than that of physical adsorption

Answer»

Which statements are correct ?

i) physical adsorption is due to Vander Waal’s forces

ii) physical adsorption decreases at high temperature

iii) physical adsorption is irreversible

iv) enthalpy for a chemical adsorption is generally lesser than that of physical adsorption

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

What is the value of 1÷17

A metal carbonate (0.5kg) gives 0.28kg of ita oxide on heating .Hence ,the equivalent weight of metal is (1)20g/eq (2)40g/eq (3)25g/eq (4)30g/e

how to calculate mass of electron in amu

Find the ratio of molecule and atom separately in equal weight of Ch4 and so3

60. If the density of methrol is 0.8 kgl/L.what is the volume needed for making 2.5 L of its 0.4M solution?

what is MABCD type?

The precursor carbocation to the product in the following reaction is

Which order is true for resonance energy?

Reduction of carbonyl group into –CH2 in presence of Zn-Hg/HCl is an example of:

Bond order of I3-

Why are metals malleable ?

If aluminium crystallises in cubic packed structure, and it's radius is 125pm then find Number of unit cells of aluminium in 1.0cm cube

what are beta-carotenes? how are they converted to retinol?

A sample of uranium rock from moon contains equimolar amounts of U238 and Pb206. The age of the rock will be (t12for U238=4.5×109yrs)

ch3coch2ch2ch2ch2coch3 +NaOH

What is the correct sequence of reagents used for coverting nitrobenzene into m-dibromobenzene?

Explain how vacancies are introduced in an ionic solid when a cation of higher valence is added as an impurity in it.

1.4g of a sample of chalk containing clay as impurity were treated with excess of did hcl . Volume of co2 evolved when measured at 15^°c 768mm pressure was 282 cm .calculate the percentage purity of sample.

It is given that when (±)-2,3-dibromobutane reacts with KOH, some of the products formed are: Explain via mechanism and then choose the correct ones from the following.

Is ,a homopolymer or copolymer?

If M0 is the mass of an oxygen isotope 8O17. MP and MN are the mass of a proton and a neutron respectively, the nuclear binding energy of the isotope is

Which one is formed when sodium phenoxide is heated with ethyl iodide a) phenetole b) ethyl phenyl alcohol c) phenol d) none of these

22. Kc= 4.24 at 800k for co(g)+H2O------> CO2+H2 calculate equilibrium conc. For all if initial conc. Of CO & H2O is 0.10M

Following chemical species were reported for water sample from a well SpeciesConcentration (milliequivalent/L)Chloride (Cl−)15Sulphate (SO2−4)15Carbonate (CO2−3)05Bicarbonate (HCO−3)30Calcium (Ca2+)12Magnesium (Mg2+)18pH8.5Alkalinity present in the water in mg/L as CaCO3

Nodal surfaces of an orbital can be of two types viz. angularnodes and radial nodes. Out of the following, select thesubshell in which orbital(s) can have non-planar angular nodes.3s3p3d4p​

The number of products possible for x (including stereomers)in the following reaction is:___

bond angle of NH4^+ is higher than that oh PH3,why?

In which of the following pairs of resonating structures first resonating structure is more contributing toward resonance hybrid than second?

2MnO−4+bC2O2−4+cH+→xMn2++yCO2+zH2OIf the above equation is balanced with integer coefficients, the value of c is ......(Round off to the nearest Integer)

Among the following, the number of metal/s which can be used as electrodes in the photoelectric cell is:(a) Li(b) Na(c) Rb(d) Cs

Calculate the molality of a solution that contains 51.2g of naphthalene (C 10​ H 8​ ) in 500mL of carbon tetrachloride. The density of CCl 4​ is 1.60g/mL

Hydrolysis of borax by diagrams

two mass of 2m and m are whirled in a horizontal circle.the radius of path of 2m is r and of m is 2r then the ratio of tention of two strings ar

What are Lorentz's laws??

If in a container neither mass and nor heat exchange occurs then it constitutes a

what is antineutrino particle ?

Why in the structure of XeOF4 , oxygen has a double bond?

Explain the fact that in aryl alkyl ethers The alkoxy group activates the benzene ring towards electrophilic substitution. It directs the incoming substituents to ortho and para positions in benzene ring.

RbO2 is

The structure of the product formed in the reaction given below is:

Which of the following has net dipole moment?

HOW MANY S-S BONDS , S-O-S BONDS , SIGMA BONDS , PI BONDS ARE PRESENT IN TRIMER OF SULPHAR TRIOXIDE

What is the condensed formula of propane?

Isomers have

Write the unit of equilibrium constant (Kc) for the given reaction. C(s)+12O2(g)→CO2(g)

At ordinary temperature the surface of metals, such as magnesium, aluminium, zinc, lead etc. do not undergo oxidation. Give reason.

What is the colour of ferrous sulphate salt?

Considerthe following reaction sequence C6H1Cl\xrightarrow[{ether }]{Mg}A\xrightarrow[{H3O+}]{Co2}B\xrightarrow[{H2So4}]{C2H5OH}C(major)

For which organic molecule do we use the term 'acetylene' ? Is 'ethylene' also used for thesame particular compound ?

Which statements are correct ? i) physical adsorption is due to Vander Waal’s forces ii) physical adsorption decreases at high temperature iii) physical adsorption is irreversible iv) enthalpy for a chemical adsorption is generally lesser than that of physical adsorption

Nodal surfaces of an orbital can be of two types viz. angularnodes and radial nodes. Out of the following, select thesubshell in which orbital(s) can have non-planar angular nodes.3s3p3d4p

Calculate the molality of a solution that contains 51.2g of naphthalene (C 10 H 8 ) in 500mL of carbon tetrachloride. The density of CCl 4 is 1.60g/mL