46295 + Interview Questions in Chemistry

1.	Gold number of some lyophilic sols are (i)Casein0.01(ii)Haemoglobin0.03(iii)Gum Arabic0.15(iv)Sodium oleate0.40 Which has maximum protective power?
Answer» Gold number of some lyophilic sols are $\begin{matrix} (i) & Casein & 0.01 (i i) & Haemoglobin & 0.03 (i i i) & Gum Arabic & 0.15 (i v) & Sodium oleate & 0.40 \end{matrix}$ Which has maximum protective power?

1.

Gold number of some lyophilic sols are (i)Casein0.01(ii)Haemoglobin0.03(iii)Gum Arabic0.15(iv)Sodium oleate0.40 Which has maximum protective power?

Answer»

Gold number of some lyophilic sols are

$\begin{matrix} (i) & Casein & 0.01 (i i) & Haemoglobin & 0.03 (i i i) & Gum Arabic & 0.15 (i v) & Sodium oleate & 0.40 \end{matrix}$

Which has maximum protective power?

Discussion

2.	When n - hexane is heated with Mo2O3 at 5000C and 20 atmospheres, the following changes takes place A. Hybridisation of carbon changes B.No of C - C bonds increases C. No of C - H bonds decreases D. Percentage of carbon increases
Answer» When n - hexane is heated with $M o_{2} O_{3}$ at $500^{0} C$ and 20 atmospheres, the following changes takes place A. Hybridisation of carbon changes B.No of C - C bonds increases C. No of C - H bonds decreases D. Percentage of carbon increases

2.

When n - hexane is heated with Mo2O3 at 5000C and 20 atmospheres, the following changes takes place A. Hybridisation of carbon changes B.No of C - C bonds increases C. No of C - H bonds decreases D. Percentage of carbon increases

Answer»

When n - hexane is heated with $M o_{2} O_{3}$ at $500^{0} C$ and 20 atmospheres, the following changes takes place

A. Hybridisation of carbon changes B.No of C - C bonds increases

C. No of C - H bonds decreases D. Percentage of carbon increases

Discussion

3.	How many facts related to CHCl3 + ethyl methyl ketone solutions are correct?___ (A) It shows a negative deviation. (B) It forms a maximum boiling azeotropic mixture. (C) ΔS>0 (D) ΔG<0 (E) Components can be separated by fractional distillation.
Answer» How many facts related to $C H C l_{3}$ + ethyl methyl ketone solutions are correct?___ (A) It shows a negative deviation. (B) It forms a maximum boiling azeotropic mixture. (C) $Δ S > 0$ (D) $Δ G < 0$ (E) Components can be separated by fractional distillation.

Discussion

4.	Total number of element(s) which have only single oxidation state (other than zero) in their corresponding stable compounds: Cs, Ba, F, Zn, Be, Al, Sr, Ga, Pb
Answer» Total number of element(s) which have only single oxidation state (other than zero) in their corresponding stable compounds: Cs, Ba, F, Zn, Be, Al, Sr, Ga, Pb

Discussion

5.	Which of the following options does not give to the correct trends indicated against it? (I) F2>Cl2>Br2>I2 : Bond dissociation energy (II) F2>Cl2>Br2>I2: Oxidizing nature (III) Cl>F>Br>I : Electron gain enthalpy (IV) F>Cl>Br>I : Electronegativity
Answer» Which of the following options does not give to the correct trends indicated against it? (I) $F_{2} > C l_{2} > B r_{2} > I_{2}$ : Bond dissociation energy (II) $F_{2} > C l_{2} > B r_{2} > I_{2}$ : Oxidizing nature (III) $C l > F > B r > I$ : Electron gain enthalpy (IV) $F > C l > B r > I$ : Electronegativity

Discussion

6.	How many electrons take part in the bond formation of N2?
Answer» How many electrons take part in the bond formation of $N_{2}$ ?

Discussion

7.	Chlorination of Benzene is:
Answer» Chlorination of Benzene is:

Discussion

8.	Calculate pH of saturated solution of Mg(OH)2,Ksp for Mg(OH)2 is 32.0×10−12. Given :log2=0.3010
Answer» Calculate pH of saturated solution of $M g (O H)_{2}, K_{s p}$ for $M g (O H)_{2}$ is $32.0 \times 10^{- 12}$ . $Given : log 2 = 0.3010$

Discussion

9.	Two identical vessels contain helium and hydrogen at same temperature, then
Answer» Two identical vessels contain helium and hydrogen at same temperature, then

Discussion

10.	The cell reaction for the given cell is spontaneous if Pt,Cl2(P1)(g)\|Cl−(1.0M)\|\|Cl−(2M)\|Cl2(P2)(g),Pt
Answer» The cell reaction for the given cell is spontaneous if $P t, C l_{2_{(P_{1})}} (g) \| C l^{-} (1.0 M) \| \| C l^{-} (2 M) \| C l_{2_{(P_{2})}} (g), P t$

Discussion

11.	The number of compounds which undergo tautomerism to form an aromatic product are :
Answer» The number of compounds which undergo tautomerism to form an aromatic product are :

Discussion

12.	A compound exists in the gaseous phase both as monomer (A) and dimer A2. The molecular weight of A is 48. In an experiment 96 g of compound was confined in vessel of volume 33.6 L and heated to 273oC. Calculate the pressure (in atm developed if the compound exists as dimer to the extent of 50% by weight under these conditions.
Answer» A compound exists in the gaseous phase both as monomer $(A)$ and dimer $A_{2}$ . The molecular weight of $A$ is $48$ . In an experiment $96 g$ of compound was confined in vessel of volume $33.6 L$ and heated to $273^{o} C$ . Calculate the pressure (in $atm$ developed if the compound exists as dimer to the extent of $50 %$ by weight under these conditions.

Discussion

13.	Which of the following species is not a Lewis acid?
Answer» Which of the following species is not a Lewis acid?

Discussion

14.	Calculate the amount of ice that will separate out on cooling a solution containing 50g of ethylene glycol in 200g of water till −9.3∘C(Kf for water =1.86 Kkgmol−1)
Answer» Calculate the amount of ice that will separate out on cooling a solution containing $50 g$ of ethylene glycol in $200 g$ of water till $- {9.3}^{\circ} C (K_{f}$ for water $= 1.86 {Kkgmol}^{- 1})$

Discussion

15.	CH3−O\|\|C−OHNH3−−−→ΔAP2O5−−−→ΔB Product 'B' in the reaction is:
Answer» $C H_{3} - O \| \| C - O H N H_{3} - -- \to Δ A P_{2} O_{5} - -- \to Δ B$ Product 'B' in the reaction is:

Discussion

16.	Oxidation state of Fe in Fe(CO)5. Reason.
Answer» Oxidation state of Fe in Fe(CO)_5._Reason.

Discussion

17.	Sir please explain how vapor pressure of solution increases due to decreased concentration
Answer» Sir please explain how vapor pressure of solution increases due to decreased concentration

Discussion

18.	The correct order regarding the electro negativity of hybrid orbital's of carbon is
Answer» The correct order regarding the electro negativity of hybrid orbital's of carbon is

Discussion

19.	What is the maximum number of emission lines when the excited electron of a H atom in n = 6 drops to the ground state?
Answer» What is the maximum number of emission lines when the excited electron of a H atom in n = 6 drops to the ground state?

Discussion

20.	Calculate the volume of carbon dioxide produced (in L) on heating 20 g of pure limestone at STP.
Answer» Calculate the volume of carbon dioxide produced (in L) on heating 20 g of pure limestone at STP.

Discussion

21.	Calculate the weight of O2(g) necessary to fill up a cylinder of 5 L capacity at 27°C and 100 atm pressure, when the compressibility factor is 0.96. (Take R=112 L atm mol−1 K−1)
Answer» Calculate the weight of $O_{2} (g)$ necessary to fill up a cylinder of 5 $L$ capacity at $27 ° C$ and 100 $atm$ pressure, when the compressibility factor is 0.96. (Take $R = \frac{1}{12} {L atm mol}^{- 1} K^{- 1}$ )

Discussion

22.	Which of the following is not true?
Answer» Which of the following is not true?

Discussion

23.	Which compound undergoes nucleophilic substitution with NaCN at the fastest rate?
Answer» Which compound undergoes nucleophilic substitution with NaCN at the fastest rate?

Discussion

24.	Calculate the kinetic energy (in joule) for 8.00 g of methane at 27∘ C.
Answer» Calculate the kinetic energy (in joule) for $8.00 g$ of methane at $27^{\circ} C$ .

Discussion

25.	Which of the following is the reducing agent in ZnO(s)+C(s)⟶Zn(s)+CO(g)
Answer» Which of the following is the reducing agent in $Z n O (s) + C (s) ⟶ Z n (s) + C O (g)$

Discussion

26.	Which reaction can't be used for the preparation of the given halogen acid?
Answer» Which reaction can't be used for the preparation of the given halogen acid?

Discussion

27.	Different between resistance and resistivity
Answer» Different between resistance and resistivity

Discussion

28.	Which of the following reactions produce phenol?
Answer» Which of the following reactions produce phenol?

Discussion

29.	On heating which of the following releases CO2 most easily?
Answer» On heating which of the following releases $C O_{2}$ most easily?

Discussion

30.	A glass plate of surface area 1 m2placed on a layer of turpentine of thickness 2 mm. If the coefficient of viscosity of turpentine 0.00149 N sm–2 The force to be applied to move the plate horizontally with a velocity of 0.1ms−1 is
Answer» A glass plate of surface area 1 $m^{2}$ placed on a layer of turpentine of thickness 2 mm. If the coefficient of viscosity of turpentine 0.00149 N sm^–2 The force to be applied to move the plate horizontally with a velocity of $0.1 m s^{- 1}$ is

Discussion

31.	CH3COOH+H2O⇌CH3COO−+H3O+;K1=1.8×10−5 2H2O⇌H3O++OH−,K2=1×1014 Equilibrium constant for reaction CH3COOH+OH−⇌CH3COO−+H2O is x×109. Find 'x'.
Answer» $C H_{3} C O O H + H_{2} O ⇌ C H_{3} C O O^{-} + H_{3} O^{+}; K_{1} = 1.8 \times 10^{- 5}$ $2 H_{2} O ⇌ H_{3} O^{+} + O H^{-}, K_{2} = 1 \times 10^{14}$ Equilibrium constant for reaction $C H_{3} C O O H + O H^{-} ⇌ C H_{3} C O O^{-} + H_{2} O$ is $x \times 10^{9}$ . Find 'x'.

Discussion

32.	Which is/are true about isothermal process of an ideal gas.
Answer» Which is/are true about isothermal process of an ideal gas.

Discussion

33.	https://photos.app.goo.gl/83hK8hdHYUnPrU618 Find out the difference between the two with the help of a reaction
Answer» https://photos.app.goo.gl/83hK8hdHYUnPrU618 Find out the difference between the two with the help of a reaction

33.

https://photos.app.goo.gl/83hK8hdHYUnPrU618 Find out the difference between the two with the help of a reaction

Answer»

https://photos.app.goo.gl/83hK8hdHYUnPrU618

Find out the difference between the two with the help of a reaction

Discussion

34.	What size of particles does a colloidal system has?
Answer» What size of particles does a colloidal system has?

Discussion

35.	Find the correct order of the ionic radius of following isoelectronic species.
Answer» Find the correct order of the ionic radius of following isoelectronic species.

Discussion

36.	What is the wavelength of a ball of mass 100 g moving with a velocity of 10 ms−1?
Answer» What is the wavelength of a ball of mass 100 g moving with a velocity of 10 $m s^{- 1}$ ?

Discussion

37.	A boy of mas 40 kg climbs up 18 steps, each of height 20 cm.Calculate the change in his potential energy
Answer» A boy of mas 40 kg climbs up 18 steps, each of height 20 cm.Calculate the change in his potential energy

Discussion

38.	How many chiral centers and stereoisomers are present in the given compound?
Answer» How many chiral centers and stereoisomers are present in the given compound?

Discussion

39.	Among the following, the number of compounds that can react with PCl5 to give POCl3 is:___ O2,CO2,SO2,H2O,H2SO4,P4O10.
Answer» Among the following, the number of compounds that can react with $P C l_{5}$ to give $P O C l_{3}$ is:___ $O_{2}, C O_{2}, S O_{2}, H_{2} O, H_{2} S O_{4}, P_{4} O_{10}$ .

Discussion

40.	How many geometrical isomers are possible in the following coordination entities? (1). [Cr(C2O4)3]3− (2). [Co(NH3)3Cl3]
Answer» How many geometrical isomers are possible in the following coordination entities? (1). ${[C r {(C_{2} O_{4})}_{3}]}_{3}^{3 -}$ (2). $[C o {(N H_{3})}_{3} C l_{3}]$

40.

How many geometrical isomers are possible in the following coordination entities? (1). [Cr(C2O4)3]3− (2). [Co(NH3)3Cl3]

Answer»

How many geometrical isomers are possible in the following coordination entities?
(1). ${[C r {(C_{2} O_{4})}_{3}]}_{3}^{3 -}$

(2). $[C o {(N H_{3})}_{3} C l_{3}]$

Discussion

41.	What happens when white phosphorus is heated?
Answer» What happens when white phosphorus is heated?

Discussion

42.	How does reducing sugar reduce any substance?
Answer» How does reducing sugar reduce any substance?

Discussion

43.	The correct order of reactivity of PhMgBr towards (I) Benzophenone (II) Acetaldehyde (III) Acetone is:
Answer» The correct order of reactivity of $P h M g B r$ towards (I) Benzophenone (II) Acetaldehyde (III) Acetone is:

Discussion

44.	How many 12C atoms are there in 24 mg of 12C?
Answer» How many $^{12} C$ atoms are there in $24 mg$ of $^{12} C$ ?

Discussion

45.	Why is the maximum covalency of Oxygen only 2?
Answer» Why is the maximum covalency of Oxygen only 2?

Discussion

46.	What is the pure form of iron
Answer» What is the pure form of iron

Discussion

47.	A chemist has one mole of X-atoms. He finds that on absorption of 410 kJ, half of X-atoms transfer one electron to the other half. If all the resulting X− ions are subsequently converted to X+ ions, an addition of 735 kJ is required. The magnitude of electron affinity of X is.
Answer» A chemist has one mole of X-atoms. He finds that on absorption of 410 kJ, half of X-atoms transfer one electron to the other half. If all the resulting $X^{-}$ ions are subsequently converted to $X^{+}$ ions, an addition of 735 kJ is required. The magnitude of electron affinity of X is.

Discussion

48.	If uncertanity in the measurement of position and momentum are equal, calculate uncertainity in the measurement of velocity:-
Answer» If uncertanity in the measurement of position and momentum are equal, calculate uncertainity in the measurement of velocity:-

Discussion

49.	Under which of the following conditions is the relation, Δ H = Δ U + PΔ V valid for a closed system?
Answer» Under which of the following conditions is the relation, $Δ H = Δ U + P Δ V$ valid for a closed system?

Discussion

50.	If in NH3 formation N uses its pure atomic orbitals then wrong statement is At least three bond angles are 90 Three sigma bonds with identical strength Lone pair will be in 2s orbital Molecule will be in T shape
Answer» If in NH3 formation N uses its pure atomic orbitals then wrong statement is At least three bond angles are 90 Three sigma bonds with identical strength Lone pair will be in 2s orbital Molecule will be in T shape

50.

If in NH3 formation N uses its pure atomic orbitals then wrong statement is At least three bond angles are 90 Three sigma bonds with identical strength Lone pair will be in 2s orbital Molecule will be in T shape

Answer»

If in NH3 formation N uses its pure atomic orbitals then wrong statement is

At least three bond angles are 90

Three sigma bonds with identical strength

Lone pair will be in 2s orbital

Molecule will be in T shape

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Gold number of some lyophilic sols are (i)Casein0.01(ii)Haemoglobin0.03(iii)Gum Arabic0.15(iv)Sodium oleate0.40 Which has maximum protective power?

When n - hexane is heated with Mo2O3 at 5000C and 20 atmospheres, the following changes takes place A. Hybridisation of carbon changes B.No of C - C bonds increases C. No of C - H bonds decreases D. Percentage of carbon increases

How many facts related to CHCl3 + ethyl methyl ketone solutions are correct?___ (A) It shows a negative deviation. (B) It forms a maximum boiling azeotropic mixture. (C) ΔS&gt;0 (D) ΔG&lt;0 (E) Components can be separated by fractional distillation.

Total number of element(s) which have only single oxidation state (other than zero) in their corresponding stable compounds: Cs, Ba, F, Zn, Be, Al, Sr, Ga, Pb

Which of the following options does not give to the correct trends indicated against it? (I) F2&gt;Cl2&gt;Br2&gt;I2 : Bond dissociation energy (II) F2&gt;Cl2&gt;Br2&gt;I2: Oxidizing nature (III) Cl&gt;F&gt;Br&gt;I : Electron gain enthalpy (IV) F&gt;Cl&gt;Br&gt;I : Electronegativity

How many electrons take part in the bond formation of N2?

Chlorination of Benzene is:

Calculate pH of saturated solution of Mg(OH)2,Ksp for Mg(OH)2 is 32.0×10−12. Given :log2=0.3010

Two identical vessels contain helium and hydrogen at same temperature, then

The cell reaction for the given cell is spontaneous if Pt,Cl2(P1)(g)|Cl−(1.0M)||Cl−(2M)|Cl2(P2)(g),Pt

The number of compounds which undergo tautomerism to form an aromatic product are :

Which of the following species is not a Lewis acid?

Calculate the amount of ice that will separate out on cooling a solution containing 50g of ethylene glycol in 200g of water till −9.3∘C(Kf for water =1.86 Kkgmol−1)

CH3−O||C−OHNH3−−−→ΔAP2O5−−−→ΔB Product 'B' in the reaction is:

Oxidation state of Fe in Fe(CO)5. Reason.

Sir please explain how vapor pressure of solution increases due to decreased concentration

The correct order regarding the electro negativity of hybrid orbital's of carbon is

What is the maximum number of emission lines when the excited electron of a H atom in n = 6 drops to the ground state?

Calculate the volume of carbon dioxide produced (in L) on heating 20 g of pure limestone at STP.

Calculate the weight of O2(g) necessary to fill up a cylinder of 5 L capacity at 27°C and 100 atm pressure, when the compressibility factor is 0.96. (Take R=112 L atm mol−1 K−1)

Which of the following is not true?

Which compound undergoes nucleophilic substitution with NaCN at the fastest rate?

Calculate the kinetic energy (in joule) for 8.00 g of methane at 27∘ C.

Which of the following is the reducing agent in ZnO(s)+C(s)⟶Zn(s)+CO(g)

Which reaction can't be used for the preparation of the given halogen acid?

Different between resistance and resistivity

Which of the following reactions produce phenol?

On heating which of the following releases CO2 most easily?

A glass plate of surface area 1 m2placed on a layer of turpentine of thickness 2 mm. If the coefficient of viscosity of turpentine 0.00149 N sm–2 The force to be applied to move the plate horizontally with a velocity of 0.1ms−1 is

CH3COOH+H2O⇌CH3COO−+H3O+;K1=1.8×10−5 2H2O⇌H3O++OH−,K2=1×1014 Equilibrium constant for reaction CH3COOH+OH−⇌CH3COO−+H2O is x×109. Find 'x'.

Which is/are true about isothermal process of an ideal gas.

https://photos.app.goo.gl/83hK8hdHYUnPrU618 Find out the difference between the two with the help of a reaction

What size of particles does a colloidal system has?

Find the correct order of the ionic radius of following isoelectronic species.

What is the wavelength of a ball of mass 100 g moving with a velocity of 10 ms−1?

A boy of mas 40 kg climbs up 18 steps, each of height 20 cm.Calculate the change in his potential energy

How many chiral centers and stereoisomers are present in the given compound?

Among the following, the number of compounds that can react with PCl5 to give POCl3 is:___ O2,CO2,SO2,H2O,H2SO4,P4O10.

How many geometrical isomers are possible in the following coordination entities? (1). [Cr(C2O4)3]3− (2). [Co(NH3)3Cl3]

What happens when white phosphorus is heated?

How does reducing sugar reduce any substance?

The correct order of reactivity of PhMgBr towards (I) Benzophenone (II) Acetaldehyde (III) Acetone is:

How many 12C atoms are there in 24 mg of 12C?

Why is the maximum covalency of Oxygen only 2?

What is the pure form of iron

A chemist has one mole of X-atoms. He finds that on absorption of 410 kJ, half of X-atoms transfer one electron to the other half. If all the resulting X− ions are subsequently converted to X+ ions, an addition of 735 kJ is required. The magnitude of electron affinity of X is.

If uncertanity in the measurement of position and momentum are equal, calculate uncertainity in the measurement of velocity:-

Under which of the following conditions is the relation, Δ H = Δ U + PΔ V valid for a closed system?

If in NH3 formation N uses its pure atomic orbitals then wrong statement is At least three bond angles are 90 Three sigma bonds with identical strength Lone pair will be in 2s orbital Molecule will be in T shape

How many facts related to CHCl3 + ethyl methyl ketone solutions are correct?___ (A) It shows a negative deviation. (B) It forms a maximum boiling azeotropic mixture. (C) ΔS>0 (D) ΔG<0 (E) Components can be separated by fractional distillation.

Which of the following options does not give to the correct trends indicated against it? (I) F2>Cl2>Br2>I2 : Bond dissociation energy (II) F2>Cl2>Br2>I2: Oxidizing nature (III) Cl>F>Br>I : Electron gain enthalpy (IV) F>Cl>Br>I : Electronegativity