46295 + Interview Questions in Chemistry

1.	Action of NaNO2/HCl in isobutyl aminegives(1) Isobutyl alcohol(2) pentanol(3) terbutanol(4) Isobutyl chloride
Answer» Action of NaNO2/HCl in isobutyl aminegives(1) Isobutyl alcohol(2) pentanol(3) terbutanol(4) Isobutyl chloride

Discussion

2.	One of the hazards of nuclear explosion is the generation of 90Sr and its subsequent incorporation in bones. This nuclide has a half-life of 28 years. Suppose one microgram was absorbed by a newborn child, how much 90Sr will remain (in micrograms) in his bones on their 14th birthday? (take √2=1.4)
Answer» One of the hazards of nuclear explosion is the generation of $^{90} S r$ and its subsequent incorporation in bones. This nuclide has a half-life of 28 years. Suppose one microgram was absorbed by a newborn child, how much $^{90} S r$ will remain (in micrograms) in his bones on their $14^{t h}$ birthday? (take $\sqrt{2} = 1.4$ )

Discussion

3.	Choose the correct order for the radii of Hg+1 and Hg2+.
Answer» Choose the correct order for the radii of $H g^{+ 1}$ and $H g^{2 +}$ .

Discussion

4.	Law of constant composition does not hold good for:
Answer» Law of constant composition does not hold good for:

Discussion

5.	will there ever be possibility of rearrangement if any alkyl halide is treated with alcoholic KO
Answer» will there ever be possibility of rearrangement if any alkyl halide is treated with alcoholic KO

Discussion

6.	23.N moles of a monoatomic gas is carried around the reversible rectangular cycle ABCDA as shown in the diagram
Answer» 23.N moles of a monoatomic gas is carried around the reversible rectangular cycle ABCDA as shown in the diagram

Discussion

7.	Which of the following is/are acceptable resonating structures of Buta-1, 2, 3-triene.
Answer» Which of the following is/are acceptable resonating structures of Buta-1, 2, 3-triene.

Discussion

8.	What is a mole and a molar mass?
Answer» What is a mole and a molar mass?

Discussion

9.	At 800°C, the following equilibrium is established as: F2(g)⇌2F(g)The composition of the equilibrium may be determined by measuring the rate of effusion of the mixture through a pinhole. It is found that at 800°C and 1 atm the mixture effuses 1.6 times as fast as SO2 effuses under similar conditions (At. wt. of F=19). The value of KP for the equilibrium is
Answer» At $800 ° C$ , the following equilibrium is established as: $F_{2} (g) ⇌ 2 F (g)$ The composition of the equilibrium may be determined by measuring the rate of effusion of the mixture through a pinhole. It is found that at $800 ° C$ and $1 atm$ the mixture effuses $1.6$ times as fast as $S O_{2}$ effuses under similar conditions $(A t . w t . o f F = 19)$ . The value of $K_{P}$ for the equilibrium is

Discussion

10.	In the reaction given below.Reagent X could be
Answer» In the reaction given below. Reagent X could be

Discussion

11.	99.IN no3- ion number of bond pair and a lone pair of electrons on nitrogen atom are 2,2 3,1 1,3 4,0
Answer» 99.IN no3- ion number of bond pair and a lone pair of electrons on nitrogen atom are 2,2 3,1 1,3 4,0

Discussion

12.	1L ofco2 is passed through red hot coke. The volume becomes 1.4L at stp. The composition of product is
Answer» 1L ofco2 is passed through red hot coke. The volume becomes 1.4L at stp. The composition of product is

Discussion

13.	Which of the following is a bicyclo compounds?
Answer» Which of the following is a bicyclo compounds?

Discussion

14.	Reagent used for conversion of allyl alcohol to acrolein is:
Answer» Reagent used for conversion of allyl alcohol to acrolein is:

Discussion

15.	Does stoichiometry define the order of any 'ELEMENTARY' reaction?
Answer» Does stoichiometry define the order of any 'ELEMENTARY' reaction?

Discussion

16.	How n^C2 is equal to n(n-1)/2?
Answer» How n^C2 is equal to n(n-1)/2?

Discussion

17.	In Tollen's reagent, the oxidation number, co-ordination number and effective atomic number of central metal ion are respectively:
Answer» In Tollen's reagent, the oxidation number, co-ordination number and effective atomic number of central metal ion are respectively:

Discussion

18.	ratio distance in first 2 second & first 3 second?
Answer» ratio distance in first 2 second & first 3 second?

Discussion

19.	When a small amount of HCL is added to a buffer solution of acetic acid and sodium acetate what happen?
Answer» When a small amount of HCL is added to a buffer solution of acetic acid and sodium acetate what happen?

Discussion

20.	How to know that CCP lattice contains 4 atoms per unit cell
Answer» How to know that CCP lattice contains 4 atoms per unit cell

Discussion

21.	ntCH3-CO-CH3(g)=CH3-CH3(g)+CO(g). Initial pressure of CH3COCH3 is 100mm.When equlibrium is set up mole fractionof CO is 1/3. Find the value of Kp.n
Answer» ntCH3-CO-CH3(g)=CH3-CH3(g)+CO(g). Initial pressure of CH3COCH3 is 100mm.When equlibrium is set up mole fractionof CO is 1/3. Find the value of Kp.n

Discussion

22.	why in reimer tiemann reaction major product is ortho product?
Answer» why in reimer tiemann reaction major product is ortho product?

Discussion

23.	What is polymerisation?
Answer» What is polymerisation?

Discussion

24.	cannizarro reaction
Answer» cannizarro reaction

Discussion

25.	In an excited state of hydrogen like atom an electron has a total energy of -3.4 eV. Then its de Broglie wavelength λ is nearly
Answer» In an excited state of hydrogen like atom an electron has a total energy of -3.4 eV. Then its de Broglie wavelength $λ$ is nearly

Discussion

26.	AB CRYSTALLIZES IN A BODY CENTERED CUBIC LATTICE WITH EDGE LENTH'' a ''EQUAL TO 387 PM.THE DISTANCE BETWEEN TWO OPPOSITIVELY CHARGED IONS IN THE LATTICE IS?
Answer» AB CRYSTALLIZES IN A BODY CENTERED CUBIC LATTICE WITH EDGE LENTH'' a ''EQUAL TO 387 PM.THE DISTANCE BETWEEN TWO OPPOSITIVELY CHARGED IONS IN THE LATTICE IS?

Discussion

27.	The plot of PT vs yA at constant temperature in the pressure composition diagram is PA→Total pressure yA→Mole fraction of A in vapour phase
Answer» The plot of $P_{T}$ vs $y_{A}$ at constant temperature in the pressure composition diagram is $P_{A} \to Total pressure$ $yA→Mole fraction of A in vapour phase$

Discussion

28.

The standard reduction potential data at 25ºC is given below.Eo(Fe3+,Fe2+)=+0.77V;Eo(Fe2+,Fe)=–0.44VEo(Cu2+,Cu)=+0.34V;Eo(Cu+,Cu)=+0.52VEo[O2(g)+4H++4e–→2H2O]=+1.23V;Eo[O2(g)+2H2O+4e−→4OH–]=+0.40VEo(Cr3+,Cr)=–0.74V;Eo(Cr2+,Cr)=–0.91VMatch Eo of the redox pair in List I with the values given in List II and select the correct answer using the code given below the lists : List I List-IIP.Eo(Fe3+,Fe)1.−0.18 VQ.Eo(4H2O→4H++4OH−)2.−0.4 VR.Eo(Cu2++Cu→2Cu+)3.−0.04VS.Eo(Cr3+,Cr2+)4.−0.83 V PQRS(A)4123(B)2341(C)1234(D)3412

Answer»

The standard reduction potential data at $25 º C$ is given below.

$E^{o} (F e^{3 +}, F e^{2 +}) = + 0.77 V;$

$E^{o} (F e^{2 +}, F e) = - 0.44 V$

$E^{o} (C u^{2 +}, C u) = + 0.34 V;$

$E^{o} (C u^{+}, C u) = + 0.52 V$

$E^{o} [O_{2} (g) + 4 H^{+} + 4 e^{-} \to 2 H_{2} O] = + 1.23 V;$

$E^{o} [O_{2} (g) + 2 H_{2} O + 4 e^{-} \to 4 O H^{-}] = + 0.40 V$

$E^{o} (C r^{3 +}, C r) = - 0.74 V;$

$E^{o} (C r^{2 +}, C r) = - 0.91 V$

Match $E^{o}$ of the redox pair in List I with the values given in List II and select the correct answer using the code given below the lists :

	List I		List-II
P.	$E^{o} (F e^{3 +}, F e)$	1.	$- 0.18 V$
Q.	$E^{o} (4 H_{2} O \to 4 H^{+} + 4 O H^{-})$	2.	$- 0.4 V$
R.	$E^{o} (C u^{2 +} + C u \to 2 C u^{+})$	3.	$- 0.04 V$
S.	$E^{o} (C r^{3 +}, C r^{2 +})$	4.	$- 0.83 V$

	$P$	$Q$	$R$	$S$
$(A)$	4	1	2	3
$(B)$	2	3	4	1
$(C)$	1	2	3	4
$(D)$	3	4	1	2

Discussion

29.	Which of the following compounds in these options have similar boiling points?
Answer» Which of the following compounds in these options have similar boiling points?

Discussion

30.	how to locate 4 + root-2
Answer» how to locate 4 + root-2

Discussion

31.	Is Benzene unsaturaded
Answer» Is Benzene unsaturaded

Discussion

32.	Plot of Maxmell’s distribution of velocities is given below:Which of the following is correct about this plot?
Answer» Plot of Maxmell’s distribution of velocities is given below: Which of the following is correct about this plot?

32.

Plot of Maxmell’s distribution of velocities is given below:Which of the following is correct about this plot?

Answer»

Plot of Maxmell’s distribution of velocities is given below:

Which of the following is correct about this plot?

Discussion

33.	Mixing of acetone with chloroform takes place with a reduction in volume. What type of deviation from Raoult's law is shown in this case?
Answer» Mixing of acetone with chloroform takes place with a reduction in volume. What type of deviation from Raoult's law is shown in this case?

Discussion

34.	A 35 gm/l solution of tracer was discharged into stream at a constant rate of 12 cm3/s. The background concentration of tracer in stream water was found to be zero. If the discharge of stream is 50m3/s then the equilibrium concentration of the tracer at a downstream section sufficiently far away is ×−−−−−106gm/l. 8.399
Answer» A 35 gm/l solution of tracer was discharged into stream at a constant rate of $12 c m^{3} / s$ . The background concentration of tracer in stream water was found to be zero. If the discharge of stream is $50 m^{3} / s$ then the equilibrium concentration of the tracer at a downstream section sufficiently far away is $\times - - - - - 10^{6} g m / l$ . 8.399

Discussion

35.	oxidation number of oxygen in H2O2
Answer» oxidation number of oxygen in H2O2

Discussion

36.	why does carboxylic acid have a prefix inspite of being top at priority table ?
Answer» why does carboxylic acid have a prefix inspite of being top at priority table ?

Discussion

37.	Why does black colour absorb more heat or why does white reflect more heat?
Answer» Why does black colour absorb more heat or why does white reflect more heat?

Discussion

38.	Dry air has a molar composition of 22% O2 and 78% N2. Calculate the average molecular weight of dry air.
Answer» Dry air has a molar composition of $22 % O_{2}$ and $78 % N_{2}$ . Calculate the average molecular weight of dry air.

Discussion

39.	he number of moles of H202 required tocompletely react with 400 ml of 0.5 N KMnO, in acidic medium are
Answer» he number of moles of H202 required tocompletely react with 400 ml of 0.5 N KMnO, in acidic medium are

Discussion

40.	Among the following which one is linear?
Answer» Among the following which one is linear?

Discussion

41.	According to octet rule the compound which contain ionic covalent and coordinate bonds 1)Caso4 2)NH4CL 3)NaNo3 4)ALL
Answer» According to octet rule the compound which contain ionic covalent and coordinate bonds 1)Caso4 2)NH4CL 3)NaNo3 4)ALL

Discussion

42.	The correct set of four quantum numbers for the valence electron of Rubidium (Z = 37) is:
Answer» The correct set of four quantum numbers for the valence electron of Rubidium (Z = 37) is:

Discussion

43.	The degree of dissociation α of a weak electrolyte, A2B3 is related to van`t Hoff factor (i) by the expression:
Answer» The degree of dissociation $α$ of a weak electrolyte, $A_{2} B_{3}$ is related to van`t Hoff factor $(i)$ by the expression:

Discussion

44.	Caffeine has a molecular weight of 194. If it contains 28.9% by mass of nitrogen.How many N atoms are there in one molecule of caffeine?
Answer» Caffeine has a molecular weight of 194. If it contains 28.9% by mass of nitrogen.How many N atoms are there in one molecule of caffeine?

Discussion

45.	the mole fraction pf a solute in a solution is 0.1 at 298 K. Molality of this solution is same as molarity. Density of this solution at 298 K is 2g/cm^3. Find the ratio of molecular weight of solute and solvent
Answer» the mole fraction pf a solute in a solution is 0.1 at 298 K. Molality of this solution is same as molarity. Density of this solution at 298 K is 2g/cm^3. Find the ratio of molecular weight of solute and solvent

Discussion

46.	An old sample of wood from an archaeological excavation was found to have a radioactivity of about 140.8 counts per minute due to 14C (t1/2=5730 years) as against 281.6 counts per minute for that of a freshly cut piece of wood. What is the age of the old sample of wood (in millennia, 1 millennium= 1000 years)?
Answer» An old sample of wood from an archaeological excavation was found to have a radioactivity of about 140.8 counts per minute due to $^{14} C (t_{1 / 2} = 5730$ years) as against 281.6 counts per minute for that of a freshly cut piece of wood. What is the age of the old sample of wood (in millennia, 1 millennium= 1000 years)?

Discussion

47.	Arrange the following bonds according to their average bond energies in descending order: C−Cl, C−Br, C−F, C−I
Answer» Arrange the following bonds according to their average bond energies in descending order: $C - C l, C - B r, C - F, C - I$

Discussion

48.	The relative lowering of the vapour pressure is equal to the ratio between the number of:
Answer» The relative lowering of the vapour pressure is equal to the ratio between the number of:

Discussion

49.	The number of electron pairs in OSF4 is
Answer» The number of electron pairs in $O S F_{4}$ is

Discussion

50.	2. What are azo and diazo ??
Answer» 2. What are azo and diazo ??

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Action of NaNO2/HCl in isobutyl aminegives(1) Isobutyl alcohol(2) pentanol(3) terbutanol(4) Isobutyl chloride

Choose the correct order for the radii of Hg+1 and Hg2+.

Law of constant composition does not hold good for:

will there ever be possibility of rearrangement if any alkyl halide is treated with alcoholic KO

23.N moles of a monoatomic gas is carried around the reversible rectangular cycle ABCDA as shown in the diagram

Which of the following is/are acceptable resonating structures of Buta-1, 2, 3-triene.

What is a mole and a molar mass?

In the reaction given below.Reagent X could be

99.IN no3- ion number of bond pair and a lone pair of electrons on nitrogen atom are 2,2 3,1 1,3 4,0

1L ofco2 is passed through red hot coke. The volume becomes 1.4L at stp. The composition of product is

Which of the following is a bicyclo compounds?

Reagent used for conversion of allyl alcohol to acrolein is:

Does stoichiometry define the order of any 'ELEMENTARY' reaction?

How n^C2 is equal to n(n-1)/2?

In Tollen's reagent, the oxidation number, co-ordination number and effective atomic number of central metal ion are respectively:

ratio distance in first 2 second & first 3 second?

When a small amount of HCL is added to a buffer solution of acetic acid and sodium acetate what happen?

How to know that CCP lattice contains 4 atoms per unit cell

ntCH3-CO-CH3(g)=CH3-CH3(g)+CO(g). Initial pressure of CH3COCH3 is 100mm.When equlibrium is set up mole fractionof CO is 1/3. Find the value of Kp.n

why in reimer tiemann reaction major product is ortho product?

What is polymerisation?

cannizarro reaction

In an excited state of hydrogen like atom an electron has a total energy of -3.4 eV. Then its de Broglie wavelength λ is nearly

AB CRYSTALLIZES IN A BODY CENTERED CUBIC LATTICE WITH EDGE LENTH'' a ''EQUAL TO 387 PM.THE DISTANCE BETWEEN TWO OPPOSITIVELY CHARGED IONS IN THE LATTICE IS?

The plot of PT vs yA at constant temperature in the pressure composition diagram is PA→Total pressure yA→Mole fraction of A in vapour phase

Which of the following compounds in these options have similar boiling points?

how to locate 4 + root-2

Is Benzene unsaturaded

Plot of Maxmell’s distribution of velocities is given below:Which of the following is correct about this plot?

Mixing of acetone with chloroform takes place with a reduction in volume. What type of deviation from Raoult's law is shown in this case?

oxidation number of oxygen in H2O2

why does carboxylic acid have a prefix inspite of being top at priority table ?

Why does black colour absorb more heat or why does white reflect more heat?

Dry air has a molar composition of 22% O2 and 78% N2. Calculate the average molecular weight of dry air.

he number of moles of H202 required tocompletely react with 400 ml of 0.5 N KMnO, in acidic medium are

Among the following which one is linear?

According to octet rule the compound which contain ionic covalent and coordinate bonds 1)Caso4 2)NH4CL 3)NaNo3 4)ALL

The correct set of four quantum numbers for the valence electron of Rubidium (Z = 37) is:

The degree of dissociation α of a weak electrolyte, A2B3 is related to van`t Hoff factor (i) by the expression:

Caffeine has a molecular weight of 194. If it contains 28.9% by mass of nitrogen.How many N atoms are there in one molecule of caffeine?

the mole fraction pf a solute in a solution is 0.1 at 298 K. Molality of this solution is same as molarity. Density of this solution at 298 K is 2g/cm^3. Find the ratio of molecular weight of solute and solvent

Arrange the following bonds according to their average bond energies in descending order: C−Cl, C−Br, C−F, C−I

The relative lowering of the vapour pressure is equal to the ratio between the number of:

The number of electron pairs in OSF4 is

2. What are azo and diazo ??