46295 + Interview Questions in Chemistry

1.	In cathode ray experiment, why the pressure was decresed insiside the cathode tube and why the wall of the cathode tube illuminating?
Answer» In cathode ray experiment, why the pressure was decresed insiside the cathode tube and why the wall of the cathode tube illuminating?

Discussion

2.	15. The enthalpy change for following reaction NaOH (aq) +HCl (aq) -> NaCl (aq) H2O (L) is -57 kJ. Predict value of enthalpy change in following reaction Ba(OH)2 +H2SO4 (aq) -> BaSO4 (S) +2H2O (L)
Answer» 15. The enthalpy change for following reaction NaOH (aq) +HCl (aq) -> NaCl (aq) H2O (L) is -57 kJ. Predict value of enthalpy change in following reaction Ba(OH)2 +H2SO4 (aq) -> BaSO4 (S) +2H2O (L)

Discussion

3.	Q 52/75 10 g of S reacts with excess of O2 to form 15 g of SO2. The% yield of the reaction is
Answer» Q 52/75 10 g of S reacts with excess of O2 to form 15 g of SO2. The% yield of the reaction is

Discussion

4.	Consider a reversible reaction 2A+B--> 2C .having equilibrium cons†an t 25.if reaction vessel having2,2.5and 0.5 mol of A, B and C respectively in 100 L vessel than what will be the direction of reaction(1) Forward2) Backward (3) exist in equilibrium
Answer» Consider a reversible reaction 2A+B--> 2C .having equilibrium cons†an t 25.if reaction vessel having2,2.5and 0.5 mol of A, B and C respectively in 100 L vessel than what will be the direction of reaction(1) Forward2) Backward (3) exist in equilibrium

Discussion

5.	The correct order of acidic strength of halogen acids is:
Answer» The correct order of acidic strength of halogen acids is:

Discussion

6.	What is definition for mole?
Answer» What is definition for mole?

Discussion

7.	XH2SO4+YSO2+ZNa2Cro4 ⟶Cr2(SO4)3) +ANa2SO4+BH2OX,Y,Z,AandB are?
Answer» 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 $H_{2} O$ X,Y,Z,AandB are?

7.

XH2SO4+YSO2+ZNa2Cro4 ⟶Cr2(SO4)3) +ANa2SO4+BH2OX,Y,Z,AandB are?

Answer»

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 $H_{2} O$ X,Y,Z,AandB are?

Discussion

8.	Lewis acid
Answer» Lewis acid

Discussion

9.	Find out the number of reagents which can oxidise Me−O\|\|C−H(I)I2/NaOH(II)KMnO4/H⊕(III)Tollen's reagent(IV)LiAlH4(V)NaBH4(VI)NH2−NH2/NaOH
Answer» Find out the number of reagents which can oxidise $M e - O \| \| C - H$ $(I) I_{2} / N a O H (I I) K M n O_{4} / H^{\oplus} (I I I) Tollen's reagent (I V) L i A l H_{4} (V) N a B H_{4}$ $(V I) N H_{2} - N H_{2} / N a O H$

Discussion

10.	Among the given following, the optically active compound(s) is/are
Answer» Among the given following, the optically active compound(s) is/are

Discussion

11.	Electrolysis of 50L aqueous solution of CH3COONa was done by passing 2F of electricity. The pH of the solution and the products obtained at anode and cathode are respectively
Answer» Electrolysis of 50L aqueous solution of CH3COONa was done by passing 2F of electricity. The pH of the solution and the products obtained at anode and cathode are respectively

Discussion

12.	hydrocarbon contain 91.3% carbon by mass. find the emprical formula of hydrocarbo
Answer» hydrocarbon contain 91.3% carbon by mass. find the emprical formula of hydrocarbo

Discussion

13.	Dihydrogengas is obtained from natural gas by partial oxidation with steam asper following endothermic reaction:(a) Write as expression for Kpforthe above reaction.(b) Howwill the values of Kpandcomposition of equilibrium mixture be affected by(i)Increasing the pressure(ii)Increasing the temperature(iii)Using a catalyst?
Answer» Dihydrogen gas is obtained from natural gas by partial oxidation with steam as per following endothermic reaction: (a) Write as expression for Kp for the above reaction. (b) How will the values of Kp and composition of equilibrium mixture be affected by (i) Increasing the pressure (ii) Increasing the temperature (iii) Using a catalyst?

13.

Dihydrogengas is obtained from natural gas by partial oxidation with steam asper following endothermic reaction:(a) Write as expression for Kpforthe above reaction.(b) Howwill the values of Kpandcomposition of equilibrium mixture be affected by(i)Increasing the pressure(ii)Increasing the temperature(iii)Using a catalyst?

Answer»

Dihydrogen
gas is obtained from natural gas by partial oxidation with steam as
per following endothermic reaction:

(a)
Write as expression for Kp
for
the above reaction.

(b) How
will the values of Kp
and
composition of equilibrium mixture be affected by

(i)
Increasing the pressure

(ii)
Increasing the temperature

(iii)
Using a catalyst?

Discussion

14.	In a certain code, RATIONAL is written as TARNOILA. How would BRUTAL be written in that code?
Answer» In a certain code, $R A T I O N A L$ is written as $T A R N O I L A$ . How would $B R U T A L$ be written in that code?

Discussion

15.	Carbon-containing compounds are also known as
Answer» Carbon-containing compounds are also known as

Discussion

16.	Thermo chemistry
Answer» Thermo chemistry

Discussion

17.	The compound used as an anesthetic during surgery is
Answer» The compound used as an anesthetic during surgery is

Discussion

18.	The decreasing order of relative nucleophilicity of the following nucleophiles in a protic solvent isSH−,AcO−,PhO−,OH−,H2O
Answer» The decreasing order of relative nucleophilicity of the following nucleophiles in a protic solvent is $S H^{-}, A c O^{-}, P h O^{-}, O H^{-}, H_{2} O$

Discussion

19.	The rate constant of a reaction is 1.5×107s−1 at 50∘C and 4.5×107s−1 at 100∘C. Calculate the Arrhenius parameter A.Take log(1.5)=0.18
Answer» The rate constant of a reaction is $1.5 \times 10^{7} s^{- 1}$ at $50^{\circ} C$ and $4.5 \times 10^{7} s^{- 1}$ at $100^{\circ} C .$ Calculate the Arrhenius parameter A. Take $log (1.5) = 0.18$

Discussion

20.	n- Octane in the presence of Cr2O3/Al2O3 at 873K changes to
Answer» n- Octane in the presence of Cr₂O₃/Al₂O₃ at 873K changes to

Discussion

21.	ph H+=-\lbrack\log H+\rbrack why we are taking negative there?
Answer» ph H+=-\lbrack\log H+\rbrack why we are taking negative there?

Discussion

22.	A sample of a pure compound contains 9.81 gm of Zn, 1.8×1023 atoms of chromium and 0.60 mole of oxygen atoms. What is its simplest formula?
Answer» A sample of a pure compound contains $9.81 gm$ of $Z n$ , $1.8 \times 10^{23}$ atoms of chromium and $0.60$ mole of oxygen atoms. What is its simplest formula?

Discussion

23.	What is line spectrum of hydrogen?
Answer» What is line spectrum of hydrogen?

Discussion

24.	i wanna ask that if both trehalose and cellobiase have same composition then why trehalose is non reducing sugar and cellobiase is reducing one ?
Answer» i wanna ask that if both trehalose and cellobiase have same composition then why trehalose is non reducing sugar and cellobiase is reducing one ?

Discussion

25.	Predict the relationship between following pairs. a) CO and NO+ b) N and O
Answer» Predict the relationship between following pairs. a) CO and NO⁺ ^{b) N and O}

25.

Predict the relationship between following pairs. a) CO and NO+ b) N and O

Answer»

Predict the relationship between following pairs.

a) CO and NO⁺

^{b) N and O}

Discussion

26.	The reaction given below is a balanced reaction where a, b, c, d, e, f and g are the stoichiometric coefficients.aHgS+bHCl+cHNO3→dH2HgCl4+eNO+fS+gH2OFind a+b+c+d+e+f+g
Answer» The reaction given below is a balanced reaction where $a, b, c, d, e, f$ and $g$ are the stoichiometric coefficients. $a H g S + b H C l + c H N O_{3} \to d H_{2} H g C l_{4} + e N O + f S + g H_{2} O$ Find $a + b + c + d + e + f + g$

Discussion

27.	बदलूकोकिसीबातसेचिढ़थीतोकाँचकीचूड़ियोंसे'औरबदलूस्वयंकहताहै-जोसुंदरताकाँचकीचूड़ियोंमेंहोतीहैलाखमेंकहाँसंभवहै?''येपंक्तियाँबदलूकीदोप्रकारकीमनोदशाओंकोसामनेलातीहैं।दूसरीपंक्तिमेंउसकेमनकीपीड़ाहै।उसमेंव्यंग्यभीहै।हारेहुएमनसे,यादुखीमनसेअथवाव्यंग्यमेंबोलेगएवाक्योंकेअर्थसामान्यनहींहोते।कुछव्यंग्यवाक्योंकोध्यानपूर्वकसमझकरएकत्रकीजिएऔरउनकेभीतरीअर्थकीव्याख्याकरकेलिखिए।
Answer» बदलू को किसी बात से चिढ़ थी तो काँच की चूड़ियों से' और बदलू स्वयं कहता है - जो सुंदरता काँच की चूड़ियों में होती है लाख में कहाँ संभव है?'' ये पंक्तियाँ बदलू की दो प्रकार की मनोदशाओं को सामने लाती हैं। दूसरी पंक्ति में उसके मन की पीड़ा है। उसमें व्यंग्य भी है। हारे हुए मन से, या दुखी मन से अथवा व्यंग्य में बोले गए वाक्यों के अर्थ सामान्य नहीं होते। कुछ व्यंग्य वाक्यों को ध्यानपूर्वक समझकर एकत्र कीजिए और उनके भीतरी अर्थ की व्याख्या करके लिखिए।

Discussion

28.	The oxidation states of transition metal atoms in K2Cr2O7, KMnO4 and K2FeO4, respectively, are x,y and z. The sum of x,y and z is:
Answer» The oxidation states of transition metal atoms in $K_{2} C r_{2} O_{7},$ $K M n O_{4}$ and $K_{2} F e O_{4},$ respectively, are $x, y a n d z .$ The sum of $x, y$ and $z$ is:

Discussion

29.	Why cyclohexanol doesn't have two beta carbon while 2 methylpentanol have?
Answer» Why cyclohexanol doesn't have two beta carbon while 2 methylpentanol have?

Discussion

30.	a ionic compound is made up of A and B only . Ions of A occupy all the corners and alternate face centres while that of B contain -1 charge then charge on atom A will be
Answer» a ionic compound is made up of A and B only . Ions of A occupy all the corners and alternate face centres while that of B contain -1 charge then charge on atom A will be

Discussion

31.	36 25 ml of a hydro carbon on combustion gives 100ml of co2 and 125 ml of H2O if number of carbon atoms and that of hydrogen atoms in one mole of given hydrocarbon is x and y respectively then sum of x and y is equal to?
Answer» 36 25 ml of a hydro carbon on combustion gives 100ml of co2 and 125 ml of H2O if number of carbon atoms and that of hydrogen atoms in one mole of given hydrocarbon is x and y respectively then sum of x and y is equal to?

Discussion

32.	Way of learning reactivity series
Answer» Way of learning reactivity series

Discussion

33.	An organic compound ′A′(C9H10O) when treated with conc. HI undergoes cleavage to yield compounds ′B′ and ′C′. ′B′ gives yellow precipitate with AgNO3 where as ′C′ tautomerizes to ′D′. ′D′ gives positive iodoform test. ′A′ could be
Answer» An organic compound $^{'} A^{'} (C_{9} H_{10} O)$ when treated with conc. $H I$ undergoes cleavage to yield compounds $^{'} B^{'}$ and $^{'} C^{'}$ . $^{'} B^{'}$ gives yellow precipitate with $A g N O_{3}$ where as $^{'} C^{'}$ tautomerizes to $^{'} D^{'}$ . $^{'} D^{'}$ gives positive iodoform test. $^{'} A^{'}$ could be

Discussion

34.	If the absolute temperature of a sample of gas in a fixed volume container is quadrupled, then the root mean square speed in the initial state Ui and that in the final state Uf would be related as :
Answer» If the absolute temperature of a sample of gas in a fixed volume container is quadrupled, then the root mean square speed in the initial state $U_{i}$ and that in the final state $U_{f}$ would be related as :

Discussion

35.	{ Q }10/58 The value of }K_c for the dissociation reaction is }}{H_2(g)=2H(g) is }1.2×10^{-43}} This equilibrium mixture contains
Answer» { Q }10/58 The value of }K_c for the dissociation reaction is }}{H_2(g)=2H(g) is }1.2×10^{-43}} This equilibrium mixture contains

Discussion

36.	The rate constant is 60s-1. How much time will it take it to reduce 1 g of the reactant to 0.0625?
Answer» The rate constant is 60s^-1. How much time will it take it to reduce 1 g of the reactant to 0.0625?

Discussion

37.	Which of the following pairs of complexes are isomeric with each other but their aqueous solutions exhibit different molar conductivities?
Answer» Which of the following pairs of complexes are isomeric with each other but their aqueous solutions exhibit different molar conductivities?

Discussion

38.	A gaseous oxide contairis 30.496 of nitrogen, one molecule of whichcontains one nitrogen atom. The density of the oxide rolative to oxygen gas3.is(A) 0.9(B) 1.44(C) 1.50(D)3.0
Answer» A gaseous oxide contairis 30.496 of nitrogen, one molecule of whichcontains one nitrogen atom. The density of the oxide rolative to oxygen gas3.is(A) 0.9(B) 1.44(C) 1.50(D)3.0

Discussion

39.	How would you account for the irregular variation of ionization enthalpies (first and second) in the first series of the transition elements?
Answer» How would you account for the irregular variation of ionization enthalpies (first and second) in the first series of the transition elements?

Discussion

40.	141.At what angle of elevation should a projectile be projected with velocity 20 ms-1,so as to reach maximum height of 10 m?
Answer» 141.At what angle of elevation should a projectile be projected with velocity 20 ms-1,so as to reach maximum height of 10 m?

Discussion

41.	How are the electrons filled in the orbitals of square planar and tetrahedral complexes through crystal field theory
Answer» How are the electrons filled in the orbitals of square planar and tetrahedral complexes through crystal field theory

Discussion

42.	If 2x58x=6-273, then x = (a) 3(b) ± 3(c) ± 6(d) 6
Answer» If $\|\begin{matrix} 2 x & 5 \\ 8 & x \end{matrix}\| = \|\begin{matrix} 6 & - 2 \\ 7 & 3 \end{matrix}\|$ , then x = (a) 3 (b) ± 3 (c) ± 6 (d) 6

Discussion

43.	Sulphur trioxide gas is an important precursor to manufacture sulphuric acid. It is produced by the catalytic oxidation of SO2 gas. Which of the following are suitable catalysts for the process?
Answer» Sulphur trioxide gas is an important precursor to manufacture sulphuric acid. It is produced by the catalytic oxidation of $S O_{2}$ gas. Which of the following are suitable catalysts for the process?

Discussion

44.	What is especially observed when a beam of light is passed through a colloidal solution?
Answer» What is especially observed when a beam of light is passed through a colloidal solution?

Discussion

45.	While finding oxidising number which valency should be considered positive or negative
Answer» While finding oxidising number which valency should be considered positive or negative

Discussion

46.	Silicones surrounded by non-polar alkyl groups are:
Answer» Silicones surrounded by non-polar alkyl groups are:

Discussion

47.	51.Among nylon ,cellulose,PVC,natural rubber the polymer in which the intermolecular force of attraction is the weakest is A.nylon. B.cellolose C.natural rubber D.PVC
Answer» 51.Among nylon ,cellulose,PVC,natural rubber the polymer in which the intermolecular force of attraction is the weakest is A.nylon. B.cellolose C.natural rubber D.PVC

Discussion

48.	30. Calculate change in entropy when 2 moles of ideal gas expanded from 10 litre to 20 litre reversibly and isothermally
Answer» 30. Calculate change in entropy when 2 moles of ideal gas expanded from 10 litre to 20 litre reversibly and isothermally

Discussion

49.	what is nomenclacture?
Answer» what is nomenclacture?

Discussion

50.	The product of following reaction is
Answer» The product of following reaction is

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

In cathode ray experiment, why the pressure was decresed insiside the cathode tube and why the wall of the cathode tube illuminating?

15. The enthalpy change for following reaction NaOH (aq) +HCl (aq) -> NaCl (aq) H2O (L) is -57 kJ. Predict value of enthalpy change in following reaction Ba(OH)2 +H2SO4 (aq) -> BaSO4 (S) +2H2O (L)

Q 52/75 10 g of S reacts with excess of O2 to form 15 g of SO2. The% yield of the reaction is

Consider a reversible reaction 2A+B--> 2C .having equilibrium cons†an t 25.if reaction vessel having2,2.5and 0.5 mol of A, B and C respectively in 100 L vessel than what will be the direction of reaction(1) Forward2) Backward (3) exist in equilibrium

The correct order of acidic strength of halogen acids is:

What is definition for mole?

XH2SO4+YSO2+ZNa2Cro4 ⟶Cr2(SO4)3) +ANa2SO4+BH2OX,Y,Z,AandB are?

Lewis acid

Find out the number of reagents which can oxidise Me−O||C−H(I)I2/NaOH(II)KMnO4/H⊕(III)Tollen's reagent(IV)LiAlH4(V)NaBH4(VI)NH2−NH2/NaOH

Among the given following, the optically active compound(s) is/are

Electrolysis of 50L aqueous solution of CH3COONa was done by passing 2F of electricity. The pH of the solution and the products obtained at anode and cathode are respectively

hydrocarbon contain 91.3% carbon by mass. find the emprical formula of hydrocarbo

In a certain code, RATIONAL is written as TARNOILA. How would BRUTAL be written in that code?

Carbon-containing compounds are also known as

Thermo chemistry

The compound used as an anesthetic during surgery is

The decreasing order of relative nucleophilicity of the following nucleophiles in a protic solvent isSH−,AcO−,PhO−,OH−,H2O

The rate constant of a reaction is 1.5×107s−1 at 50∘C and 4.5×107s−1 at 100∘C. Calculate the Arrhenius parameter A.Take log(1.5)=0.18

n- Octane in the presence of Cr2O3/Al2O3 at 873K changes to

ph H+=-\lbrack\log H+\rbrack why we are taking negative there?

A sample of a pure compound contains 9.81 gm of Zn, 1.8×1023 atoms of chromium and 0.60 mole of oxygen atoms. What is its simplest formula?

What is line spectrum of hydrogen?

i wanna ask that if both trehalose and cellobiase have same composition then why trehalose is non reducing sugar and cellobiase is reducing one ?

Predict the relationship between following pairs. a) CO and NO+ b) N and O

The reaction given below is a balanced reaction where a, b, c, d, e, f and g are the stoichiometric coefficients.aHgS+bHCl+cHNO3→dH2HgCl4+eNO+fS+gH2OFind a+b+c+d+e+f+g

The oxidation states of transition metal atoms in K2Cr2O7, KMnO4 and K2FeO4, respectively, are x,y and z. The sum of x,y and z is:

Why cyclohexanol doesn't have two beta carbon while 2 methylpentanol have?

a ionic compound is made up of A and B only . Ions of A occupy all the corners and alternate face centres while that of B contain -1 charge then charge on atom A will be

36 25 ml of a hydro carbon on combustion gives 100ml of co2 and 125 ml of H2O if number of carbon atoms and that of hydrogen atoms in one mole of given hydrocarbon is x and y respectively then sum of x and y is equal to?

Way of learning reactivity series

An organic compound ′A′(C9H10O) when treated with conc. HI undergoes cleavage to yield compounds ′B′ and ′C′. ′B′ gives yellow precipitate with AgNO3 where as ′C′ tautomerizes to ′D′. ′D′ gives positive iodoform test. ′A′ could be

If the absolute temperature of a sample of gas in a fixed volume container is quadrupled, then the root mean square speed in the initial state Ui and that in the final state Uf would be related as :

{ Q }10/58 The value of }K_c for the dissociation reaction is }}{H_2(g)=2H(g) is }1.2×10^{-43}} This equilibrium mixture contains

The rate constant is 60s-1. How much time will it take it to reduce 1 g of the reactant to 0.0625?

Which of the following pairs of complexes are isomeric with each other but their aqueous solutions exhibit different molar conductivities?

A gaseous oxide contairis 30.496 of nitrogen, one molecule of whichcontains one nitrogen atom. The density of the oxide rolative to oxygen gas3.is(A) 0.9(B) 1.44(C) 1.50(D)3.0

How would you account for the irregular variation of ionization enthalpies (first and second) in the first series of the transition elements?

141.At what angle of elevation should a projectile be projected with velocity 20 ms-1,so as to reach maximum height of 10 m?

How are the electrons filled in the orbitals of square planar and tetrahedral complexes through crystal field theory

If 2x58x=6-273, then x = (a) 3(b) ± 3(c) ± 6(d) 6

Sulphur trioxide gas is an important precursor to manufacture sulphuric acid. It is produced by the catalytic oxidation of SO2 gas. Which of the following are suitable catalysts for the process?

What is especially observed when a beam of light is passed through a colloidal solution?

While finding oxidising number which valency should be considered positive or negative

Silicones surrounded by non-polar alkyl groups are:

51.Among nylon ,cellulose,PVC,natural rubber the polymer in which the intermolecular force of attraction is the weakest is A.nylon. B.cellolose C.natural rubber D.PVC

30. Calculate change in entropy when 2 moles of ideal gas expanded from 10 litre to 20 litre reversibly and isothermally

what is nomenclacture?

The product of following reaction is