46295 + Interview Questions in Chemistry

1.	4. Cl-CH2-CH2-CH2-I + KCN -----> REACTION IN PRESENCE OD ACETONE
Answer» 4. Cl-CH2-CH2-CH2-I + KCN -----> REACTION IN PRESENCE OD ACETONE

Discussion

2.

Out of the following, the species that can act as both oxidising as well as reducing agent is/are I.N2O3II.N2H4III.FeSO3IV.H4P2O6V.H2S2O7

Answer»

Out of the following, the species that can act as both oxidising as well as reducing agent is/are

I.	$N_{2} O_{3}$	II.	$N_{2} H_{4}$
III.	$F e S O_{3}$	IV.	$H_{4} P_{2} O_{6}$
V.	$H_{2} S_{2} O_{7}$

Discussion

3.	phenylglyoxal on heating with concentrated NaOH solution gives??
Answer» phenylglyoxal on heating with concentrated NaOH solution gives??

Discussion

4.	There are four pairs of compounds give. Separately, each compound is subjected to pyrolysis (or heated). Based on the tendency to undergo pyrolysis, which of the following pairs can be distinguished. The distinction shall be solely based on the ability to undergo pyrolysis.
Answer» There are four pairs of compounds give. Separately, each compound is subjected to pyrolysis (or heated). Based on the tendency to undergo pyrolysis, which of the following pairs can be distinguished. The distinction shall be solely based on the ability to undergo pyrolysis.

Discussion

5.	Why the number of tetrahedral voids are double than number of octahedral voids
Answer» Why the number of tetrahedral voids are double than number of octahedral voids

Discussion

6.	The angular velocity of an electron occupying the second Bohr orbit of He+ ion is: (in s−1)
Answer» The angular velocity of an electron occupying the second Bohr orbit of $H e^{+}$ ion is: (in $s^{- 1}$ )

Discussion

7.	The order of following alkynes in increasing number of acidic hydrogen is
Answer» The order of following alkynes in increasing number of acidic hydrogen is

7.

The order of following alkynes in increasing number of acidic hydrogen is

Answer»

The order of following alkynes in increasing number of acidic hydrogen is

Discussion

8.	How will we know if we have to write a suffix or a prefix of a functional group in Nomenclatures of organic compounds ?
Answer» How will we know if we have to write a suffix or a prefix of a functional group in Nomenclatures of organic compounds ?

Discussion

9.	If the velocity of the electron in Bohr’s first orbit is 2.19 × 106 ms–1, calculate the de Broglie wavelength associated with it.
Answer» If the velocity of the electron in Bohr’s first orbit is 2.19 × $10^{6}$ m $s^{- 1}$ , calculate the de Broglie wavelength associated with it.

9.

If the velocity of the electron in Bohr’s first orbit is 2.19 × 106 ms–1, calculate the de Broglie wavelength associated with it.

Answer»

If the velocity of the electron in Bohr’s first orbit is 2.19 × $10^{6}$ m $s^{- 1}$ , calculate the de Broglie wavelength associated with it.

Discussion

10.	covalency and oxidation numbers of nitrogen in N_2O_5 is respectivel
Answer» covalency and oxidation numbers of nitrogen in N_2O_5 is respectivel

Discussion

11.	With which one of the following elements silicon should be doped so as to give p-type of semiconductor?
Answer» With which one of the following elements silicon should be doped so as to give p-type of semiconductor?

Discussion

12.	There is a circular tube in a vertical plane. Two liquids which do not mix and of densities d1 and d2 are filled in the tube. Each liquid subtends 90o angle at the centre. Radius joining their interface makes an angle α=30o with vertical. Ratiod1d2 is (Answer upto two digit after the decimal point)
Answer» There is a circular tube in a vertical plane. Two liquids which do not mix and of densities $d_{1}$ and $d_{2}$ are filled in the tube. Each liquid subtends $90^{o}$ angle at the centre. Radius joining their interface makes an angle $α = 30^{o}$ with vertical. Ratio $\frac{d_{1}}{d_{2}}$ is (Answer upto two digit after the decimal point)

Discussion

13.	68. How equilibrium constant for a reversible reaction is equal to ratio of rate constant of forward reaction to that of backward reaction?
Answer» 68. How equilibrium constant for a reversible reaction is equal to ratio of rate constant of forward reaction to that of backward reaction?

Discussion

14.	What is the rms speed of a gas molecule of mass 10−22 g at room temperature 27∘ C according to the kinetic theory of gases?
Answer» What is the rms speed of a gas molecule of mass $10^{- 22} g$ at room temperature $27^{\circ} C$ according to the kinetic theory of gases?

Discussion

15.	What is stability in chemistry ??
Answer» What is stability in chemistry ??

Discussion

16.	Why does particles get adsorbed on surface? How do the surface particles adsorb other substances on its surface the residual force is the force on the surface by the bulk?
Answer» Why does particles get adsorbed on surface? How do the surface particles adsorb other substances on its surface the residual force is the force on the surface by the bulk?

Discussion

17.	Which are the things in universe are not matter which does not occupies space and volume
Answer» Which are the things in universe are not matter which does not occupies space and volume

Discussion

18.	The bond angle in alcohols is slightly less then the tetrahedral angle. It is due to which of the following reasons:
Answer» The bond angle in alcohols is slightly less then the tetrahedral angle. It is due to which of the following reasons:

Discussion

19.	On treatment of 100 mL of 0.1 M solution of CoCl3.6H2O with excess AgNO3;1.2×1022 ions are precipitated. The complex is:
Answer» On treatment of 100 mL of 0.1 M solution of $C o C l_{3} .6 H_{2} O$ with excess $A g N O_{3}; 1.2 \times 10^{22}$ ions are precipitated. The complex is:

Discussion

20.	C2H6(g)⇌C2H4(g)+H2(g) ;Kp=0.05 atm. The value of ΔG∘ of the reaction at 627 ∘C would be: (Given:ln(0.05)≈−3; R=8.3 J K−1 mol−1)
Answer» $C_{2} H_{6} (g) ⇌ C_{2} H_{4} (g) + H_{2} (g); K_{p} = 0.05 atm$ . The value of $Δ G^{\circ}$ of the reaction at $627^{\circ} C$ would be: $(Given : ln (0.05) \approx - 3; R = 8.3 {J K}^{- 1} {mol}^{- 1})$

Discussion

21.	Which of the following is true in respect of adsorption?
Answer» Which of the following is true in respect of adsorption?

Discussion

22.	Ice at −20 ∘C is added to 50 g of water at 40 ∘C, when the temperature of the mixture reaches 0 ∘C, it is found that 20 g of ice is still unmelted. The amount of ice added to the water was close to(Specific heat of water=4.2 Jg−1 ∘C−1Specific heat of Ice=2.1 Jg−1 ∘C−1Heat of fusion of water at 0 ∘C=334 Jg−1)
Answer» Ice at $- 20^{\circ} C$ is added to $50 g$ of water at $40^{\circ} C$ , when the temperature of the mixture reaches $0^{\circ} C$ , it is found that $20 g$ of ice is still unmelted. The amount of ice added to the water was close to $(Specific heat of water = 4.2 {Jg}^{- 1}^{\circ} C^{- 1} Specific heat of Ice = 2.1 {Jg}^{- 1}^{\circ} C^{- 1} Heat of fusion of water at 0^{\circ} C = 334 {Jg}^{- 1})$

Discussion

23.	Find the total cyclic structural isomers of C6H12
Answer» Find the total cyclic structural isomers of $C_{6} H_{12}$

Discussion

24.	The most abundant element in the earth crust is
Answer» The most abundant element in the earth crust is

Discussion

25.	order of hydration energy and latice energy of NaCl and MgCl2 with explanatio
Answer» order of hydration energy and latice energy of NaCl and MgCl2 with explanatio

Discussion

26.	Rank the following bonds of CO2−3 in decreasing order of their bond length
Answer» Rank the following bonds of $C O_{3}^{2 -}$ in decreasing order of their bond length

Discussion

27.	Find the number of quanta of radiations of frequency 5.03×1013 s−1 that must be absorbed in order to melt 5 g of ice. The energy required to melt 1 g of ice is 333 J.
Answer» Find the number of quanta of radiations of frequency $5.03 \times 10^{13} s^{- 1}$ that must be absorbed in order to melt 5 g of ice. The energy required to melt 1 g of ice is 333 J.

Discussion

28.	Which one of the following crystals does not exhibit Frenkel defefect
Answer» Which one of the following crystals does not exhibit Frenkel defefect

Discussion

29.	19 why does only ionic bond get dissociated in water?
Answer» 19 why does only ionic bond get dissociated in water?

Discussion

30.	The standard reduction potential of the reaction at 25° C ,H2O+e− gives half 12H2(g)+OH− is -0.8277 V. The equilibrium constant for the reaction H2O reversible H3O++OH− at 25° C is
Answer» The standard reduction potential of the reaction at 25° C , $H_{2} O + e^{-}$ gives half ${\frac{1}{2} H}_{2} (g) + O H^{-}$ is -0.8277 V. The equilibrium constant for the reaction $H_{2} O$ reversible $H_{3} O^{+} + O H^{-}$ at 25° C is

Discussion

31.	A chemical reaction always: 1) Always reversible 2) Always irreversible 3) Sometimes reversible 4) None of abov
Answer» A chemical reaction always: 1) Always reversible 2) Always irreversible 3) Sometimes reversible 4) None of abov

Discussion

32.	Which two equipments would you choose to prepare and collect sulphur dioxide gas in the laboratory?(1) I and IV(2) I and III(3) II and IV(4) II and III
Answer» Which two equipments would you choose to prepare and collect sulphur dioxide gas in the laboratory? (1) I and IV (2) I and III (3) II and IV (4) II and III

Discussion

33.	200 cm3 on an aqueous solution contains 1.2 g of a polymer. The osmotic pressure of such solution at 300 K is found to be 2×10−3 atm . What will be the molar mass of the polymer ?
Answer» $200 c m^{3}$ on an aqueous solution contains $1.2 g$ of a polymer. The osmotic pressure of such solution at $300 K$ is found to be $2 \times 10^{- 3} a t m$ . What will be the molar mass of the polymer ?

Discussion

34.	37 One of the following which does not observe the anti-Markovnikoffs addition of HBr, is 1) Pent-2-ene 2) Propene 3) But-2-ene 4) But-1-ene
Answer» 37 One of the following which does not observe the anti-Markovnikoffs addition of HBr, is 1) Pent-2-ene 2) Propene 3) But-2-ene 4) But-1-ene

Discussion

35.	the radioactivity of given sample of whisky due to tritium (half life =12yers) was found to be only 3.125% of that measureed in a rescently perchased bottle marked 10yrs old By how many yrs ago the sample must have been prepard
Answer» the radioactivity of given sample of whisky due to tritium (half life =12yers) was found to be only 3.125% of that measureed in a rescently perchased bottle marked 10yrs old By how many yrs ago the sample must have been prepard

Discussion

36.	18. How many number of atoms are present in hexagonal close packing unit cell A)4 B)6 C)12 D)17
Answer» 18. How many number of atoms are present in hexagonal close packing unit cell A)4 B)6 C)12 D)17

Discussion

37.	In the extraction of iron, limestone is added as:
Answer» In the extraction of iron, limestone is added as:

Discussion

38.	What is priority order of structural isomers ?
Answer» What is priority order of structural isomers ?

Discussion

39.	For the reaction, PCl5(g)⇌PCl3(g)+Cl2(g), the degree of dissociation 'x' is related to pressure 'P(x<<1)
Answer» For the reaction, $P C l_{5} (g) ⇌ P C l_{3} (g) + C l_{2} (g)$ , the degree of dissociation 'x' is related to pressure 'P(x<<1)

Discussion

40.	7.Content of oxygen in two metal oxide are 27.6% and 30% respectivaly. If the formula of first oxide is X3O4 then what will be the formula of second oxide?
Answer» 7.Content of oxygen in two metal oxide are 27.6% and 30% respectivaly. If the formula of first oxide is X3O4 then what will be the formula of second oxide?

Discussion

41.	The order of first electron affinity of O, S and Se is -
Answer» The order of first electron affinity of O, S and Se is -

Discussion

42.	Writestructures of the following compounds:(i) 2-Chloro-3-methylpentane(ii) 1-Chloro-4-ethylcyclohexane(iii) 4-tert. Butyl-3-iodoheptane(iv) 1,4-Dibromobut-2-ene(v) 1-Bromo-4-sec. butyl-2-methylbenzene
Answer» Write structures of the following compounds: (i) 2-Chloro-3-methylpentane (ii) 1-Chloro-4-ethylcyclohexane (iii) 4-tert. Butyl-3-iodoheptane (iv) 1,4-Dibromobut-2-ene (v) 1-Bromo-4-sec. butyl-2-methylbenzene

42.

Writestructures of the following compounds:(i) 2-Chloro-3-methylpentane(ii) 1-Chloro-4-ethylcyclohexane(iii) 4-tert. Butyl-3-iodoheptane(iv) 1,4-Dibromobut-2-ene(v) 1-Bromo-4-sec. butyl-2-methylbenzene

Answer»

Write
structures of the following compounds:

(i)
2-Chloro-3-methylpentane

(ii)
1-Chloro-4-ethylcyclohexane

(iii)
4-tert. Butyl-3-iodoheptane

(iv)
1,4-Dibromobut-2-ene

(v)
1-Bromo-4-sec. butyl-2-methylbenzene

Discussion

43.	An ideal monoatomic gas is taken round the cycle ABCDA as shown in ﬁgure. The work done during the cycle is:
Answer» An ideal monoatomic gas is taken round the cycle ABCDA as shown in ﬁgure. The work done during the cycle is:

43.

An ideal monoatomic gas is taken round the cycle ABCDA as shown in ﬁgure. The work done during the cycle is:

Answer»

An ideal monoatomic gas is taken round the cycle ABCDA as shown in ﬁgure. The work done during the cycle is:

Discussion

44.	suppose the wave length of light is increased from 3000 to 3040 armstrong Find the corresponding change in stopping potential ( hc=12.4 *10 rais to power -7 evm) WITH SOLUTION
Answer» suppose the wave length of light is increased from 3000 to 3040 armstrong Find the corresponding change in stopping potential ( hc=12.4 *10 rais to power -7 evm) WITH SOLUTION

Discussion

45.	How can a carbo action have 6 valence electrons
Answer» How can a carbo action have 6 valence electrons

Discussion

46.	. The readings of a bath on Celsius and Fahrenheitthermometers are in the ratio 2 5. Thetemperature of the bath is(1) -26.66^° C(3) 45.71^° C(2) 40^° C(4) 26.66^° ct
Answer» . The readings of a bath on Celsius and Fahrenheitthermometers are in the ratio 2 5. Thetemperature of the bath is(1) -26.66^° C(3) 45.71^° C(2) 40^° C(4) 26.66^° ct

Discussion

47.	A conducting rod of length l rotates about one of its end with angular velicity omega .potential difference between a and b is
Answer» A conducting rod of length l rotates about one of its end with angular velicity omega .potential difference between a and b is

Discussion

48.	1 In 1 - chlora 4 -bromobenzene electrophile will attack where and who is considered as more activating gr and what will be the major pdt?
Answer» 1 In 1 - chlora 4 -bromobenzene electrophile will attack where and who is considered as more activating gr and what will be the major pdt?

Discussion

49.	Pick the incorrect option about ionic bond.
Answer» Pick the incorrect option about ionic bond.

Discussion

50.	Which of the following is liable to be oxidised by periodic acid ?
Answer» Which of the following is liable to be oxidised by periodic acid ?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

4. Cl-CH2-CH2-CH2-I + KCN -----> REACTION IN PRESENCE OD ACETONE

Out of the following, the species that can act as both oxidising as well as reducing agent is/are I.N2O3II.N2H4III.FeSO3IV.H4P2O6V.H2S2O7

phenylglyoxal on heating with concentrated NaOH solution gives??

There are four pairs of compounds give. Separately, each compound is subjected to pyrolysis (or heated). Based on the tendency to undergo pyrolysis, which of the following pairs can be distinguished. The distinction shall be solely based on the ability to undergo pyrolysis.

Why the number of tetrahedral voids are double than number of octahedral voids

The angular velocity of an electron occupying the second Bohr orbit of He+ ion is: (in s−1)

The order of following alkynes in increasing number of acidic hydrogen is

How will we know if we have to write a suffix or a prefix of a functional group in Nomenclatures of organic compounds ?

If the velocity of the electron in Bohr’s first orbit is 2.19 × 106 ms–1, calculate the de Broglie wavelength associated with it.

covalency and oxidation numbers of nitrogen in N_2O_5 is respectivel

With which one of the following elements silicon should be doped so as to give p-type of semiconductor?

68. How equilibrium constant for a reversible reaction is equal to ratio of rate constant of forward reaction to that of backward reaction?

What is the rms speed of a gas molecule of mass 10−22 g at room temperature 27∘ C according to the kinetic theory of gases?

What is stability in chemistry ??

Why does particles get adsorbed on surface? How do the surface particles adsorb other substances on its surface the residual force is the force on the surface by the bulk?

Which are the things in universe are not matter which does not occupies space and volume

The bond angle in alcohols is slightly less then the tetrahedral angle. It is due to which of the following reasons:

On treatment of 100 mL of 0.1 M solution of CoCl3.6H2O with excess AgNO3;1.2×1022 ions are precipitated. The complex is:

C2H6(g)⇌C2H4(g)+H2(g) ;Kp=0.05 atm. The value of ΔG∘ of the reaction at 627 ∘C would be: (Given:ln(0.05)≈−3; R=8.3 J K−1 mol−1)

Which of the following is true in respect of adsorption?

Find the total cyclic structural isomers of C6H12

The most abundant element in the earth crust is

order of hydration energy and latice energy of NaCl and MgCl2 with explanatio

Rank the following bonds of CO2−3 in decreasing order of their bond length

Find the number of quanta of radiations of frequency 5.03×1013 s−1 that must be absorbed in order to melt 5 g of ice. The energy required to melt 1 g of ice is 333 J.

Which one of the following crystals does not exhibit Frenkel defefect

19 why does only ionic bond get dissociated in water?

The standard reduction potential of the reaction at 25° C ,H2O+e− gives half 12H2(g)+OH− is -0.8277 V. The equilibrium constant for the reaction H2O reversible H3O++OH− at 25° C is

A chemical reaction always: 1) Always reversible 2) Always irreversible 3) Sometimes reversible 4) None of abov

Which two equipments would you choose to prepare and collect sulphur dioxide gas in the laboratory?(1) I and IV(2) I and III(3) II and IV(4) II and III

200 cm3 on an aqueous solution contains 1.2 g of a polymer. The osmotic pressure of such solution at 300 K is found to be 2×10−3 atm . What will be the molar mass of the polymer ?

37 One of the following which does not observe the anti-Markovnikoffs addition of HBr, is 1) Pent-2-ene 2) Propene 3) But-2-ene 4) But-1-ene

the radioactivity of given sample of whisky due to tritium (half life =12yers) was found to be only 3.125% of that measureed in a rescently perchased bottle marked 10yrs old By how many yrs ago the sample must have been prepard

18. How many number of atoms are present in hexagonal close packing unit cell A)4 B)6 C)12 D)17

In the extraction of iron, limestone is added as:

What is priority order of structural isomers ?

For the reaction, PCl5(g)⇌PCl3(g)+Cl2(g), the degree of dissociation 'x' is related to pressure 'P(x&lt;&lt;1)

7.Content of oxygen in two metal oxide are 27.6% and 30% respectivaly. If the formula of first oxide is X3O4 then what will be the formula of second oxide?

The order of first electron affinity of O, S and Se is -

Writestructures of the following compounds:(i) 2-Chloro-3-methylpentane(ii) 1-Chloro-4-ethylcyclohexane(iii) 4-tert. Butyl-3-iodoheptane(iv) 1,4-Dibromobut-2-ene(v) 1-Bromo-4-sec. butyl-2-methylbenzene

An ideal monoatomic gas is taken round the cycle ABCDA as shown in ﬁgure. The work done during the cycle is:

suppose the wave length of light is increased from 3000 to 3040 armstrong Find the corresponding change in stopping potential ( hc=12.4 *10 rais to power -7 evm) WITH SOLUTION

How can a carbo action have 6 valence electrons

. The readings of a bath on Celsius and Fahrenheitthermometers are in the ratio 2 5. Thetemperature of the bath is(1) -26.66^° C(3) 45.71^° C(2) 40^° C(4) 26.66^° ct

A conducting rod of length l rotates about one of its end with angular velicity omega .potential difference between a and b is

1 In 1 - chlora 4 -bromobenzene electrophile will attack where and who is considered as more activating gr and what will be the major pdt?

Pick the incorrect option about ionic bond.

Which of the following is liable to be oxidised by periodic acid ?

For the reaction, PCl5(g)⇌PCl3(g)+Cl2(g), the degree of dissociation 'x' is related to pressure 'P(x<<1)