46295 + Interview Questions in Chemistry

1.	What is the cause of brownian movement???
Answer» What is the cause of brownian movement???

Discussion

2.	In a sample of radioactive material what fraction of the initial number of active nuclei will remain undisintigrated after half life of the sample? 1) 1/4. 2) 1/2 3) 1/21/2 4) 1
Answer» In a sample of radioactive material what fraction of the initial number of active nuclei will remain undisintigrated after half life of the sample? 1) 1/4. 2) 1/2 3) 1/2^1/24) 1

Discussion

3.	What happens when polyhydroxybutyvalerate reacts with ammonia
Answer» What happens when polyhydroxybutyvalerate reacts with ammonia

Discussion

4.	Number of valence electrons present in 3.2 g of S–2 ion will be Options: 0.6 × NA Should have chosen 0.8 × NA 1.2 × NA Wrong 1.6 × NA
Answer» Number of valence electrons present in 3.2 g of S–2 ion will be Options: 0.6 × NA Should have chosen 0.8 × NA 1.2 × NA Wrong 1.6 × NA

Discussion

5.	Which molecule has the highest bond order?
Answer» Which molecule has the highest bond order?

Discussion

6.	Bakelite is obtained from phenol by reacting with
Answer» Bakelite is obtained from phenol by reacting with

Discussion

7.	Ourbodys ood has acid is it
Answer» Ourbodys ood has acid is it

Discussion

8.	What is the meaning of statement-Isomorphous substances can grow in saturated solutions of each other
Answer» What is the meaning of statement-Isomorphous substances can grow in saturated solutions of each other

Discussion

9.	ntwhat is the difference between reaction taking place in acidic medium , basic medium and neutral medium?n
Answer» ntwhat is the difference between reaction taking place in acidic medium , basic medium and neutral medium?n

Discussion

10.	Find the value of n , l , m of the 19 and 22 of electron chromium atom ?
Answer» Find the value of n , l , m of the 19 and 22 of electron chromium atom ?

Discussion

11.	in which at least one sigma bond of np(sigma np) orbital is present 1.B2 2.O2 3.C2 4.LI2
Answer» in which at least one sigma bond of np(sigma np) orbital is present 1.B2 2.O2 3.C2 4.LI2

Discussion

12.	30. A cubical block of ice of mass m and edge L isplaced in large tray of mass M. If the ice melts, bywhat distance the center of mass of (ice + tray)system descend?semLmL(m+M)(2) 2(m+M)MLmL(3) M
Answer» 30. A cubical block of ice of mass m and edge L isplaced in large tray of mass M. If the ice melts, bywhat distance the center of mass of (ice + tray)system descend?semLmL(m+M)(2) 2(m+M)MLmL(3) M

Discussion

13.	is the following equation correct?W of a substance A * 22.4 = M of substance A where W is given mass or weight and M is the molecular mass
Answer» is the following equation correct? W of a substance A * 22.4 = M of substance A where W is given mass or weight and M is the molecular mass

Discussion

14.	33. The optical rotation of a compound w as found +60. If a mixture is formed along with its enantiomer the optical rotation observed is -40 .The % of dextro form is
Answer» 33. The optical rotation of a compound w as found +60. If a mixture is formed along with its enantiomer the optical rotation observed is -40 .The % of dextro form is

Discussion

15.	Write the name of nobles gases that belong to s and p block.
Answer» Write the name of nobles gases that belong to s and p block.

Discussion

16.	H3PO4+NaOH its equation is
Answer» H3PO4+NaOH its equation is

Discussion

17.	Ni/Pt/Pd in H2 can reduce ester group or not?
Answer» Ni/Pt/Pd in H2 can reduce ester group or not?

Discussion

18.	Why - I effect of OR is greater than that of OH ??Shouldn't it be the opposite ?
Answer» Why - I effect of OR is greater than that of OH ??Shouldn't it be the opposite ?

Discussion

19.	If \|1+3/x\|>2
Answer» If \|1+3/x\|>2

Discussion

20.	what is n- factor for the rnx.? Fe2S3 + O2 \xrightarrow[{}]{} Feso4 + SO2
Answer» what is n- factor for the rnx.? Fe2S3 + O2 \xrightarrow[{}]{} Feso4 + SO2

Discussion

21.	How to know that in the formation of any compound hybridisation will take place?
Answer» How to know that in the formation of any compound hybridisation will take place?

Discussion

22.	What is the totalnumber of sigma and pi bonds in the following molecules?(a)C2H2(b) C2H4
Answer» What is the total number of sigma and pi bonds in the following molecules? (a) C₂H₂ (b) C₂H₄

22.

What is the totalnumber of sigma and pi bonds in the following molecules?(a)C2H2(b) C2H4

Answer»

What is the total
number of sigma and pi bonds in the following molecules?

(a)
C₂H₂
(b) C₂H₄

Discussion

23.	Generally transition elements and their salts are colored due to the presence of unpaired electrons in metal ions. Which of the following compounds are colored?
Answer» Generally transition elements and their salts are colored due to the presence of unpaired electrons in metal ions. Which of the following compounds are colored?

Discussion

24.	what are lone pairs ?
Answer» what are lone pairs ?

Discussion

25.	If PCl5 is 80% dissociated at 523 K, what is the vapour density of the equilibrium mixture at 523 K ?
Answer» If $P C l_{5}$ is 80% dissociated at $523 K$ , what is the vapour density of the equilibrium mixture at $523 K$ ?

Discussion

26.	nt2M of 100 ml Na2SO4 is mixed with 3M of 100ml NaCl solution and 1M of 200 ml CaCl2 solution. Then then ntratio of the concentration of cation and anion.n nt(A) 1/2 (B) 2 (C) 1.5 (D) 1n
Answer» nt2M of 100 ml Na2SO4 is mixed with 3M of 100ml NaCl solution and 1M of 200 ml CaCl2 solution. Then then ntratio of the concentration of cation and anion.n nt(A) 1/2 (B) 2 (C) 1.5 (D) 1n

Discussion

27.	The depression in freezing point of 0.01 M aqueous solution of urea, sodium chloride and sodium sulphate are in the ratio:
Answer» The depression in freezing point of $0.01 M$ aqueous solution of urea, sodium chloride and sodium sulphate are in the ratio:

Discussion

28.	Which of the following has the maximum number of unpaired electrons?( Given Atomic number: Sc=21,Fe=26,V=23,Ni=28)
Answer» Which of the following has the maximum number of unpaired electrons? ( Given Atomic number: $S c = 21, F e = 26, V = 23, N i = 28)$

Discussion

29.

One mole of a monatomic ideal gas undergoes four thermodynamic processes as shown schematically in the PV-diagram below. Among these four processes, one is isobaric, one is isochoric, one is isothermal and one is adiabatic. Match the processes mentioned in List-1 with the corresponding statements in List-II.List-IList-IIP. In process I1. Work done by the gas is zeroQ. In process II2 Temperature of the gas remains unchangedR. In process III3 No heat is exchanged between the gas and its surroundingsS. In process IV4 Work done by the gas is 6P0V0

Answer»

One mole of a monatomic ideal gas undergoes four thermodynamic processes as shown schematically in the $P V$ -diagram below. Among these four processes, one is isobaric, one is isochoric, one is isothermal and one is adiabatic. Match the processes mentioned in List-1 with the corresponding statements in List-II.

List-I	List-II
P. In process I	1. Work done by the gas is zero
Q. In process II	2 Temperature of the gas remains unchanged
R. In process III	3 No heat is exchanged between the gas and its surroundings
S. In process IV	4 Work done by the gas is $6 P_{0} V_{0}$

Discussion

30.	42. Identify total number of mono chlorinated products when 2-methyl pentane react with Cl2/hv ?
Answer» 42. Identify total number of mono chlorinated products when 2-methyl pentane react with Cl2/hv ?

Discussion

31.	Write an article of about 1000 words explaining the structure, methods of preparation, properties and isomerism in Amines.
Answer» Write an article of about 1000 words explaining the structure, methods of preparation, properties and isomerism in Amines.

Discussion

32.	Both ionic & covalent bonds are present in _____
Answer» Both ionic & covalent bonds are present in _____

Discussion

33.	The properties of most of the ionic solids deviate from their ideal ionic character because the lattice undergoes some distortion. Cations are usually smaller than anions and have a higher effective nuclear charge. The outer electron cloud in a cation is more firmly held than in an anion. The loose electron cloud of an anion, when attracted by the electron cloud of a cation, gets distorted. This phenomenon is known as polarization. Due to this phenomenon, the electron cloud of an anion shifts towards the cation which decreases both the magnitude of positive charge on the cation and the negative charge on the anion. In other words, covalent character develops in the ionic bond Which of the following alkali metal carbonates decompose on heating?
Answer» The properties of most of the ionic solids deviate from their ideal ionic character because the lattice undergoes some distortion. Cations are usually smaller than anions and have a higher effective nuclear charge. The outer electron cloud in a cation is more firmly held than in an anion. The loose electron cloud of an anion, when attracted by the electron cloud of a cation, gets distorted. This phenomenon is known as polarization. Due to this phenomenon, the electron cloud of an anion shifts towards the cation which decreases both the magnitude of positive charge on the cation and the negative charge on the anion. In other words, covalent character develops in the ionic bond Which of the following alkali metal carbonates decompose on heating?

Discussion

34.	The major product of the following reaction:
Answer» The major product of the following reaction:

Discussion

35.	41.Why cathode in electrolysis is taken as negative and anode as positive whereas in electrochemical reaction cathod is positive and anode is negative
Answer» 41.Why cathode in electrolysis is taken as negative and anode as positive whereas in electrochemical reaction cathod is positive and anode is negative

Discussion

36.	What do you observe when sugar crystals are mixed in water?
Answer» What do you observe when sugar crystals are mixed in water?

Discussion

37.	What is meant by hydroboration-oxidation reaction? Illustrate it with an example.
Answer» What is meant by hydroboration-oxidation reaction? Illustrate it with an example.

Discussion

38.	The density of sodium borohydride is 1.074 g/ cm3. 3.91 gm of sodium borohydride contains 2.50×1023 atoms of H. The number of moles of H-atoms present in 28.0 cm3 of sodium borohydride is:
Answer» The density of sodium borohydride is $1.074 {g/ cm}^{3} . 3. 91 gm$ of sodium borohydride contains $2.50 \times 10^{23}$ atoms of $H .$ The number of moles of $H$ -atoms present in $28.0 {cm}^{3}$ of sodium borohydride is:

Discussion

39.	3 When Cyclohexene reacts with SO2Cl2 ,B is formed and then B is treated with LAH to form C. Find C.
Answer» 3 When Cyclohexene reacts with SO2Cl2 ,B is formed and then B is treated with LAH to form C. Find C.

Discussion

40.	Wurtzite structure(of zinc sulphide) in hcp and it's coordination number of cation and anion.
Answer» Wurtzite structure(of zinc sulphide) in hcp and it's coordination number of cation and anion.

Discussion

41.	Calculate the emperical formula of a mineral having the following composition CaO=48.0% P2O5= 41.3 CaCl2 = 10.5
Answer» Calculate the emperical formula of a mineral having the following composition CaO=48.0% P2O5= 41.3 CaCl2 = 10.5

Discussion

42.	AH2O−−−−→H2SO4B A1. Hg(OAc)2, H2O−−−−−−−−−−−→2. NaBH4B A1. BH3, THF−−−−−−−−−→2. H2O2, OH−B From the following, A may be:
Answer» $A H_{2} O - --- \to H_{2} S O_{4} B$ $A 1. H g (O A c)_{2}, H_{2} O - ---------- \to 2. N a B H_{4} B$ $A 1. B H_{3}, T H F - -------- \to 2. H_{2} O_{2}, O H^{-} B$ From the following, A may be:

Discussion

43.	ntThe equivalent weight if FeS2 in the following reactions is FeS2+O2=Fe3+ +SO2n ntExplain in detailn
Answer» ntThe equivalent weight if FeS2 in the following reactions is FeS2+O2=Fe3+ +SO2n ntExplain in detailn

Discussion

44.	How to identify the basicity of an compound by seeing it's molarity
Answer» How to identify the basicity of an compound by seeing it's molarity

Discussion

45.	the specific rotation of pure enantiomer is +16, its observed rotation if it is isolated from a reaction with 25% racemisation and 75% retention, is?
Answer» the specific rotation of pure enantiomer is +16, its observed rotation if it is isolated from a reaction with 25% racemisation and 75% retention, is?

Discussion

46.	1.5 g sample of KCIO on heating decomposed intwo ways2 KCIO32 KCI 30,4 KCIO3> 3 KСIO, + KCІIf the amount of KCIO, present in the residue is0.395 g, then the volume of O, collected at STP is
Answer» 1.5 g sample of KCIO on heating decomposed intwo ways2 KCIO32 KCI 30,4 KCIO3> 3 KСIO, + KCІIf the amount of KCIO, present in the residue is0.395 g, then the volume of O, collected at STP is

Discussion

47.	strongest bond is in between .
Answer» strongest bond is in between .

Discussion

48.	35.Which bond overlapping is stronger s-s ,s-p , p-p ?All are axial
Answer» 35.Which bond overlapping is stronger s-s ,s-p , p-p ?All are axial

Discussion

49.	Which of the following curve assures that the metal obtained by carbon reduction is in the vapour state?
Answer» Which of the following curve assures that the metal obtained by carbon reduction is in the vapour state?

Discussion

50.	A white substance having alkaline nature in solution is
Answer» A white substance having alkaline nature in solution is

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

What is the cause of brownian movement???

In a sample of radioactive material what fraction of the initial number of active nuclei will remain undisintigrated after half life of the sample? 1) 1/4. 2) 1/2 3) 1/21/2 4) 1

What happens when polyhydroxybutyvalerate reacts with ammonia

Number of valence electrons present in 3.2 g of S–2 ion will be Options: 0.6 × NA Should have chosen 0.8 × NA 1.2 × NA Wrong 1.6 × NA

Which molecule has the highest bond order?

Bakelite is obtained from phenol by reacting with

Ourbodys ood has acid is it

What is the meaning of statement-Isomorphous substances can grow in saturated solutions of each other

ntwhat is the difference between reaction taking place in acidic medium , basic medium and neutral medium?n

Find the value of n , l , m of the 19 and 22 of electron chromium atom ?

in which at least one sigma bond of np(sigma np) orbital is present 1.B2 2.O2 3.C2 4.LI2

30. A cubical block of ice of mass m and edge L isplaced in large tray of mass M. If the ice melts, bywhat distance the center of mass of (ice + tray)system descend?semLmL(m+M)(2) 2(m+M)MLmL(3) M

is the following equation correct?W of a substance A * 22.4 = M of substance A where W is given mass or weight and M is the molecular mass

33. The optical rotation of a compound w as found +60. If a mixture is formed along with its enantiomer the optical rotation observed is -40 .The % of dextro form is

Write the name of nobles gases that belong to s and p block.

H3PO4+NaOH its equation is

Ni/Pt/Pd in H2 can reduce ester group or not?

Why - I effect of OR is greater than that of OH ??Shouldn't it be the opposite ?

If |1+3/x|>2

what is n- factor for the rnx.? Fe2S3 + O2 \xrightarrow[{}]{} Feso4 + SO2

How to know that in the formation of any compound hybridisation will take place?

What is the totalnumber of sigma and pi bonds in the following molecules?(a)C2H2(b) C2H4

Generally transition elements and their salts are colored due to the presence of unpaired electrons in metal ions. Which of the following compounds are colored?

what are lone pairs ?

If PCl5 is 80% dissociated at 523 K, what is the vapour density of the equilibrium mixture at 523 K ?

nt2M of 100 ml Na2SO4 is mixed with 3M of 100ml NaCl solution and 1M of 200 ml CaCl2 solution. Then then ntratio of the concentration of cation and anion.n nt(A) 1/2 (B) 2 (C) 1.5 (D) 1n

The depression in freezing point of 0.01 M aqueous solution of urea, sodium chloride and sodium sulphate are in the ratio:

Which of the following has the maximum number of unpaired electrons?( Given Atomic number: Sc=21,Fe=26,V=23,Ni=28)

42. Identify total number of mono chlorinated products when 2-methyl pentane react with Cl2/hv ?

Write an article of about 1000 words explaining the structure, methods of preparation, properties and isomerism in Amines.

Both ionic &amp; covalent bonds are present in _____

The major product of the following reaction:

41.Why cathode in electrolysis is taken as negative and anode as positive whereas in electrochemical reaction cathod is positive and anode is negative

What do you observe when sugar crystals are mixed in water?

What is meant by hydroboration-oxidation reaction? Illustrate it with an example.

The density of sodium borohydride is 1.074 g/ cm3. 3.91 gm of sodium borohydride contains 2.50×1023 atoms of H. The number of moles of H-atoms present in 28.0 cm3 of sodium borohydride is:

3 When Cyclohexene reacts with SO2Cl2 ,B is formed and then B is treated with LAH to form C. Find C.

Wurtzite structure(of zinc sulphide) in hcp and it's coordination number of cation and anion.

Calculate the emperical formula of a mineral having the following composition CaO=48.0% P2O5= 41.3 CaCl2 = 10.5

AH2O−−−−→H2SO4B A1. Hg(OAc)2, H2O−−−−−−−−−−−→2. NaBH4B A1. BH3, THF−−−−−−−−−→2. H2O2, OH−B From the following, A may be:

ntThe equivalent weight if FeS2 in the following reactions is FeS2+O2=Fe3+ +SO2n ntExplain in detailn

How to identify the basicity of an compound by seeing it's molarity

the specific rotation of pure enantiomer is +16, its observed rotation if it is isolated from a reaction with 25% racemisation and 75% retention, is?

1.5 g sample of KCIO on heating decomposed intwo ways2 KCIO32 KCI 30,4 KCIO3> 3 KСIO, + KCІIf the amount of KCIO, present in the residue is0.395 g, then the volume of O, collected at STP is

strongest bond is in between .

35.Which bond overlapping is stronger s-s ,s-p , p-p ?All are axial

Which of the following curve assures that the metal obtained by carbon reduction is in the vapour state?

A white substance having alkaline nature in solution is

Both ionic & covalent bonds are present in _____