46295 + Interview Questions in Chemistry

1.	Which one of these is not a characteristic of prosthetic groups?
Answer» Which one of these is not a characteristic of prosthetic groups?

Discussion

2.	Why is NH4NO3 not used in the laboratory preparation of ammonia?
Answer» Why is $N H_{4} N O_{3}$ not used in the laboratory preparation of ammonia?

Discussion

3.	The stability of carbocations follows the order
Answer» The stability of carbocations follows the order

Discussion

4.	The oxides of chlorine, bromine and iodine are well known. They have various compositions. The oxides of chlorine are thermally unstable and dangerously explosive. They react with alkali. The bromine oxides are thermally more stable than chlorine oxides. The structure of halogen oxides is explained on the basis of VSEPR theory. Which oxide of chlorine is colourless?
Answer» The oxides of chlorine, bromine and iodine are well known. They have various compositions. The oxides of chlorine are thermally unstable and dangerously explosive. They react with alkali. The bromine oxides are thermally more stable than chlorine oxides. The structure of halogen oxides is explained on the basis of VSEPR theory. Which oxide of chlorine is colourless?

4.

The oxides of chlorine, bromine and iodine are well known. They have various compositions. The oxides of chlorine are thermally unstable and dangerously explosive. They react with alkali. The bromine oxides are thermally more stable than chlorine oxides. The structure of halogen oxides is explained on the basis of VSEPR theory. Which oxide of chlorine is colourless?

Answer»

The oxides of chlorine, bromine and iodine are well known. They have various compositions. The oxides of chlorine are thermally unstable and dangerously explosive. They react with alkali. The bromine oxides are thermally more stable than chlorine oxides. The structure of halogen oxides is explained on the basis of VSEPR theory.

Which oxide of chlorine is colourless?

Discussion

5.	Isopropyl alcohol when treated with copper at 575K forms
Answer» Isopropyl alcohol when treated with copper at 575K forms

Discussion

6.	The amount of energy required to remove the electron from a Li2+ ion in its ground state is how many times greater than the amount of energy required to remove the electron from an H-atom in its ground state?
Answer» The amount of energy required to remove the electron from a Li²⁺ ion in its ground state is how many times greater than the amount of energy required to remove the electron from an H-atom in its ground state?

Discussion

7.	FAD is electron acceptor during oxidation of
Answer» FAD is electron acceptor during oxidation of

Discussion

8.	CH3C≡CCH3(i)X−−−−−−−→(ii)H2O/ZnCH3−C−C−CH3 \|\| \|\| O O X in the above reaction is
Answer» $C H_{3} C \equiv C C H_{3} (i) X - ------ \to (i i) H_{2} O / Z n C H_{3} - C - C - C H_{3}$ $\| \| \| \|$ $O O$ X in the above reaction is

8.

CH3C≡CCH3(i)X−−−−−−−→(ii)H2O/ZnCH3−C−C−CH3 || || O O X in the above reaction is

Answer»

$C H_{3} C \equiv C C H_{3} (i) X - ------ \to (i i) H_{2} O / Z n C H_{3} - C - C - C H_{3}$

$| | | |$

$O O$

X in the above reaction is

Discussion

9.	Explaing why does conductivity of germanimum crystals increase on doping with galium ?
Answer» Explaing why does conductivity of germanimum crystals increase on doping with galium ?

Discussion

10.	The major product is:
Answer» The major product is:

Discussion

11.	Similarity in the radius of Zr and Hf is explained on the basis of
Answer» Similarity in the radius of Zr and Hf is explained on the basis of

Discussion

12.	Give two instances of (a) Overuse of environmental resources. (b) Misuse of environmental resources.
Answer» Give two instances of (a) Overuse of environmental resources. (b) Misuse of environmental resources.

12.

Give two instances of (a) Overuse of environmental resources. (b) Misuse of environmental resources.

Answer»

Give two instances of

(a) Overuse of environmental resources.

(b) Misuse of environmental resources.

Discussion

13.	The major product of the following reaction is: R−CN 1.AlH(i−Bu)2, −−−−−−−−−−−−→2.H2O?
Answer» The major product of the following reaction is: $R - CN 1 . AlH {(i - Bu)}_{2}, - ----------- \to 2 . H_{2} O ?$

Discussion

14.	According to Werner's theory primary and secondary valency of [CoCl3(NH3)3]Cl3 is
Answer» According to Werner's theory primary and secondary valency of [CoCl₃(NH₃)₃]Cl₃ is

Discussion

15.	A sample containing only caco3 and Mgco3 is ignited to CaO and Mgo . The mixture of oxides produced weight exactly half as much as the original sample . Calculate the percentage of caco3 and mgco3 in the sample
Answer» A sample containing only caco3 and Mgco3 is ignited to CaO and Mgo . The mixture of oxides produced weight exactly half as much as the original sample . Calculate the percentage of caco3 and mgco3 in the sample

15.

A sample containing only caco3 and Mgco3 is ignited to CaO and Mgo . The mixture of oxides produced weight exactly half as much as the original sample . Calculate the percentage of caco3 and mgco3 in the sample

Answer»

A sample containing only caco3 and Mgco3 is ignited to CaO and Mgo . The mixture of oxides produced weight exactly half as much as the original sample .

Calculate the percentage of caco3 and mgco3 in the sample

Discussion

16.	What is the role of carbon monoxide in the purification of nickel
Answer» What is the role of carbon monoxide in the purification of nickel

Discussion

17.	There are three lumps of a given radioactive substance. Their activity is in the ratio of 1:2:3 now. What will bethe ratio of their activities at any further date?
Answer» There are three lumps of a given radioactive substance. Their activity is in the ratio of 1:2:3 now. What will bethe ratio of their activities at any further date?

Discussion

18.	Which of the following displace Br2 from an aqueous solution containing bromide ions?
Answer» Which of the following displace $B r_{2}$ from an aqueous solution containing bromide ions?

Discussion

19.	In Bohr series of lines of hydrogen spectrum, the third line from the red end corresponds to which one of the following inter-orbit jumps of the electron for Bohr orbits in an atom of hydrogen?
Answer» In Bohr series of lines of hydrogen spectrum, the third line from the red end corresponds to which one of the following inter-orbit jumps of the electron for Bohr orbits in an atom of hydrogen?

Discussion

20.	How much time would it take to distribute one Avogadro number of wheat grains, if 1010 grains are distributed each second?
Answer» How much time would it take to distribute one Avogadro number of wheat grains, if $10^{10}$ grains are distributed each second?

Discussion

21.	What volume of 0.05 M Ca(OH)2 solution (in mL) is needed for complete conversion of 10 mL of 0.1 M H3PO4 into Ca(H2PO4)2?
Answer» What volume of $0.05 M C a (O H)_{2}$ solution $(i n m L)$ is needed for complete conversion of $10 m L$ of $0.1 M H_{3} P O_{4}$ into $C a (H_{2} P O_{4})_{2} ?$

Discussion

22.	Which will form geometrical isomers?
Answer» Which will form geometrical isomers?

Discussion

23.	Not considering the electronic spin, the degeneracy of the second excited state (n = 3) of H atom is 9, while the degeneracy of the second excited state of H− is:___
Answer» Not considering the electronic spin, the degeneracy of the second excited state (n = 3) of H atom is 9, while the degeneracy of the second excited state of $H^{-}$ is:___

Discussion

24.	The species that do not contain peroxide ions is
Answer» The species that do not contain peroxide ions is

Discussion

25.	There is O – O bond in
Answer» There is O – O bond in

Discussion

26.	Though [CuCl4]^2- exists, but [CuI4]^2- doesn't - Why?
Answer» Though [CuCl4]^2- exists, but [CuI4]^2- doesn't - Why?

Discussion

27.	Why is hydrogen referred to a rogue element????!
Answer» Why is hydrogen referred to a rogue element????!

Discussion

28.	Why copper matte is put in silica lined converter?
Answer» Why copper matte is put in silica lined converter?

Discussion

29.	Assertion (A) Most of the synthetic polymers are not biodegradable. Reason (R) Polymerisation process induces toxic character in organic molecules. (a) Assertion and Reason both are correct statement But reason does not explain Assertion. (b) Assertion and Reason both are correct statement and Reason explains the Assertion. (c) Both assertion and reason are wrong statements. (d) Assertion is correct statement and Reason is wrong statement. (e) Assertion is wrong statement and reason is correct statement.
Answer» Assertion (A) Most of the synthetic polymers are not biodegradable. Reason (R) Polymerisation process induces toxic character in organic molecules. (a) Assertion and Reason both are correct statement But reason does not explain Assertion. (b) Assertion and Reason both are correct statement and Reason explains the Assertion. (c) Both assertion and reason are wrong statements. (d) Assertion is correct statement and Reason is wrong statement. (e) Assertion is wrong statement and reason is correct statement.

29.

Assertion (A) Most of the synthetic polymers are not biodegradable. Reason (R) Polymerisation process induces toxic character in organic molecules. (a) Assertion and Reason both are correct statement But reason does not explain Assertion. (b) Assertion and Reason both are correct statement and Reason explains the Assertion. (c) Both assertion and reason are wrong statements. (d) Assertion is correct statement and Reason is wrong statement. (e) Assertion is wrong statement and reason is correct statement.

Answer»

Assertion (A) Most of the synthetic polymers are not biodegradable.

Reason (R) Polymerisation process induces toxic character in organic molecules.

(a) Assertion and Reason both are correct statement But reason does not explain Assertion.

(b) Assertion and Reason both are correct statement and Reason explains the Assertion.

(c) Both assertion and reason are wrong statements.

(d) Assertion is correct statement and Reason is wrong statement.

(e) Assertion is wrong statement and reason is correct statement.

Discussion

30.	In which of the following compounds does manganese have the maximum radius?
Answer» In which of the following compounds does manganese have the maximum radius?

Discussion

31.	A 200 mL solution of NaOH requires 100 mL of 0.44 M aqueous HCl for complete neutralization. The temperature of the mixture increased by 1.96 K . Calculate the enthalpy change for the neutralization of one mole of hydrogen ions. Given specific heat of water =4.184 J/g K
Answer» A $200 m L$ solution of $N a O H$ requires $100 m L$ of $0.44 M$ aqueous $H C l$ for complete neutralization. The temperature of the mixture increased by $1.96 K$ . Calculate the enthalpy change for the neutralization of one mole of hydrogen ions. Given specific heat of water = $4.184 J / g K$

Discussion

32.	When 1 mole of CrCl3.6H2O is treated with AgNO3, x moles of AgCl are obtained. The formula of the compound is [Cr(H2O)6]Cl3, y is the oxidation number of Cr and z is the coordination number of the compound. The value of 2x+y–z is ___.
Answer» When 1 mole of $C r C l_{3} .6 H_{2} O$ is treated with $A g N O_{3}$ , $x$ moles of $A g C l$ are obtained. The formula of the compound is $[C r (H_{2} O)_{6}] C l_{3}$ , $y$ is the oxidation number of $C r$ and $z$ is the coordination number of the compound. The value of $2 x + y - z$ is ___.

Discussion

33.	An energy of 24.6 eV is required to remove one of the electrons from a ground state neutral helium atom. The energy (in eV) required to remove both the electrons from ground state of a neutral helium atom is
Answer» An energy of 24.6 eV is required to remove one of the electrons from a ground state neutral helium atom. The energy (in eV) required to remove both the electrons from ground state of a neutral helium atom is

Discussion

34.	For the balanced chemical equation : xH2SO4+ySO2+zNa2CrO4⟶Cr2(SO4)3+aNa2SO4+bH2O The value of x+y+z-a-b is :3
Answer» For the balanced chemical equation : $x H_{2} S O_{4} + y S O_{2} + z N a_{2} C r O_{4} ⟶ C r_{2} (S O_{4})_{3} + a N a_{2} S O_{4} + b H_{2} O$ The value of x+y+z-a-b is : 3

Discussion

35.	Why don't alkynes show stereoisomerism?undefinedundefinedundefinedundefined
Answer» Why don't alkynes show stereoisomerism? undefined undefined undefined undefined

Discussion

36.	The fermentation of starch to give alcohol occurs mainly with the help of [CPMT 1971; MH CET 1999; RPMT 2000]
Answer» The fermentation of starch to give alcohol occurs mainly with the help of [CPMT 1971; MH CET 1999; RPMT 2000]

Discussion

37.	The pressure of H2 required to make the potential of H2 electrode zero in pure water at 298 K is
Answer» The pressure of $H_{2}$ required to make the potential of $H_{2}$ electrode zero in pure water at 298 K is

Discussion

38.	For which of the following compounds a valid Lewis structure cannot be drawn without violating the octet rule?
Answer» For which of the following compounds a valid Lewis structure cannot be drawn without violating the octet rule?

Discussion

39.	Which of the following is a polar compound
Answer» Which of the following is a polar compound

39.

Which of the following is a polar compound

Answer»

Which of the following is a polar compound

Discussion

40.	4 mol of a mixture containing same number of moles each of NaNO3,NH4NO3,LiNO3,Ca(NO3)2,Pb(NO3)2,AgNO3,Hg2(NO3)2andZn(NO3)2 was heated strongly. Total number of moles of NO2(g) evolved is___
Answer» 4 mol of a mixture containing same number of moles each of $N a N O_{3}, N H_{4} N O_{3}, L i N O_{3}, C a (N O_{3})_{2}, P b (N O_{3})_{2}, A g N O_{3}, H g_{2} (N O_{3})_{2} a n d Z n (N O_{3})_{2}$ was heated strongly. Total number of moles of $N O_{2 (g)}$ evolved is___

Discussion

41.	Electrical conduction of fused electrolyte depends on
Answer» Electrical conduction of fused electrolyte depends on

Discussion

42.	The acid having O – O bond is
Answer» The acid having O – O bond is

Discussion

43.	Identify the structure of P
Answer» Identify the structure of P

43.

Identify the structure of P

Answer»

Identify the structure of P

Discussion

44.	Which of the following cannot be regarded as molecular solid ? (a)SIC (silicon carbide) (b) AIN (c) Diamond (d) I2
Answer» Which of the following cannot be regarded as molecular solid ? (a)SIC (silicon carbide) (b) AIN (c) Diamond (d) $I_{2}$

44.

Which of the following cannot be regarded as molecular solid ? (a)SIC (silicon carbide) (b) AIN (c) Diamond (d) I2

Answer»

Which of the following cannot be regarded as molecular solid ?

(a)SIC (silicon carbide) (b) AIN

(c) Diamond (d) $I_{2}$

Discussion

45.	Xenon fluorides are very good oxidising and fluorinating agents. They also act as F− donors and acceptors. When XeF4 donates its fluoride to SbF5, then the states of hybridisation of central atom of cationic part and anionic part product are :
Answer» Xenon fluorides are very good oxidising and fluorinating agents. They also act as $F^{-}$ donors and acceptors. When $X e F_{4}$ donates its fluoride to $S b F_{5}$ , then the states of hybridisation of central atom of cationic part and anionic part product are :

Discussion

46.	Isoelectric point is the pH at which:
Answer» Isoelectric point is the pH at which:

Discussion

47.	Which series of reactions correctly represents chemical reactions related to iron and its compounds?
Answer» Which series of reactions correctly represents chemical reactions related to iron and its compounds?

Discussion

48.	A gaseous compound is composed of 85.7% by mass carbon and 14.3% by mass hydrogen. Its density is 2.5 g/litre and one mole of the gas occupies 44.8 L of space at a particular temperature and pressure. Determine the molecular formula of the compound.
Answer» A gaseous compound is composed of $85.7 %$ by mass carbon and $14.3 %$ by mass hydrogen. Its density is $2.5$ g/litre and one mole of the gas occupies 44.8 L of space at a particular temperature and pressure. Determine the molecular formula of the compound.

Discussion

49.	Which of the following are correct for the above mentioned sequence of reaction?
Answer» Which of the following are correct for the above mentioned sequence of reaction?

Discussion

50.	The product of oxidation of I− with MnO−4 in alkaline medium is:
Answer» The product of oxidation of $I^{-}$ with $M n O_{4}^{-}$ in alkaline medium is:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Which one of these is not a characteristic of prosthetic groups?

Why is NH4NO3 not used in the laboratory preparation of ammonia?

The stability of carbocations follows the order

Isopropyl alcohol when treated with copper at 575K forms

The amount of energy required to remove the electron from a Li2+ ion in its ground state is how many times greater than the amount of energy required to remove the electron from an H-atom in its ground state?

FAD is electron acceptor during oxidation of

CH3C≡CCH3(i)X−−−−−−−→(ii)H2O/ZnCH3−C−C−CH3 || || O O X in the above reaction is

Explaing why does conductivity of germanimum crystals increase on doping with galium ?

The major product is:

Similarity in the radius of Zr and Hf is explained on the basis of

Give two instances of (a) Overuse of environmental resources. (b) Misuse of environmental resources.

The major product of the following reaction is: R−CN 1.AlH(i−Bu)2, −−−−−−−−−−−−→2.H2O?

According to Werner's theory primary and secondary valency of [CoCl3(NH3)3]Cl3 is

A sample containing only caco3 and Mgco3 is ignited to CaO and Mgo . The mixture of oxides produced weight exactly half as much as the original sample . Calculate the percentage of caco3 and mgco3 in the sample

What is the role of carbon monoxide in the purification of nickel

There are three lumps of a given radioactive substance. Their activity is in the ratio of 1:2:3 now. What will bethe ratio of their activities at any further date?

Which of the following displace Br2 from an aqueous solution containing bromide ions?

In Bohr series of lines of hydrogen spectrum, the third line from the red end corresponds to which one of the following inter-orbit jumps of the electron for Bohr orbits in an atom of hydrogen?

How much time would it take to distribute one Avogadro number of wheat grains, if 1010 grains are distributed each second?

What volume of 0.05 M Ca(OH)2 solution (in mL) is needed for complete conversion of 10 mL of 0.1 M H3PO4 into Ca(H2PO4)2?

Which will form geometrical isomers?

Not considering the electronic spin, the degeneracy of the second excited state (n = 3) of H atom is 9, while the degeneracy of the second excited state of H− is:___

The species that do not contain peroxide ions is

There is O – O bond in

Though [CuCl4]^2- exists, but [CuI4]^2- doesn't - Why?

Why is hydrogen referred to a rogue element????!

Why copper matte is put in silica lined converter?

In which of the following compounds does manganese have the maximum radius?

A 200 mL solution of NaOH requires 100 mL of 0.44 M aqueous HCl for complete neutralization. The temperature of the mixture increased by 1.96 K . Calculate the enthalpy change for the neutralization of one mole of hydrogen ions. Given specific heat of water =4.184 J/g K

When 1 mole of CrCl3.6H2O is treated with AgNO3, x moles of AgCl are obtained. The formula of the compound is [Cr(H2O)6]Cl3, y is the oxidation number of Cr and z is the coordination number of the compound. The value of 2x+y–z is ___.

An energy of 24.6 eV is required to remove one of the electrons from a ground state neutral helium atom. The energy (in eV) required to remove both the electrons from ground state of a neutral helium atom is

For the balanced chemical equation : xH2SO4+ySO2+zNa2CrO4⟶Cr2(SO4)3+aNa2SO4+bH2O The value of x+y+z-a-b is :3

Why don't alkynes show stereoisomerism?undefinedundefinedundefinedundefined

The fermentation of starch to give alcohol occurs mainly with the help of [CPMT 1971; MH CET 1999; RPMT 2000]

The pressure of H2 required to make the potential of H2 electrode zero in pure water at 298 K is

For which of the following compounds a valid Lewis structure cannot be drawn without violating the octet rule?

Which of the following is a polar compound

4 mol of a mixture containing same number of moles each of NaNO3,NH4NO3,LiNO3,Ca(NO3)2,Pb(NO3)2,AgNO3,Hg2(NO3)2andZn(NO3)2 was heated strongly. Total number of moles of NO2(g) evolved is___

Electrical conduction of fused electrolyte depends on

The acid having O – O bond is

Identify the structure of P

Which of the following cannot be regarded as molecular solid ? (a)SIC (silicon carbide) (b) AIN (c) Diamond (d) I2

Xenon fluorides are very good oxidising and fluorinating agents. They also act as F− donors and acceptors. When XeF4 donates its fluoride to SbF5, then the states of hybridisation of central atom of cationic part and anionic part product are :

Isoelectric point is the pH at which:

Which series of reactions correctly represents chemical reactions related to iron and its compounds?

A gaseous compound is composed of 85.7% by mass carbon and 14.3% by mass hydrogen. Its density is 2.5 g/litre and one mole of the gas occupies 44.8 L of space at a particular temperature and pressure. Determine the molecular formula of the compound.

Which of the following are correct for the above mentioned sequence of reaction?

The product of oxidation of I− with MnO−4 in alkaline medium is: