46295 + Interview Questions in Chemistry Page 3 InterviewSolution

101.	38. Atomic orbital is the wave function of psi for an electron in an atom expain
Answer» 38. Atomic orbital is the wave function of psi for an electron in an atom expain

Discussion

102.	The isomers which can be converted into another form by rotation of molecule around single bond are
Answer» The isomers which can be converted into another form by rotation of molecule around single bond are

Discussion

103.	The pH value of decinormal solution of NH_4OH which is 20% ionised i
Answer» The pH value of decinormal solution of NH_4OH which is 20% ionised i

Discussion

104.	If temperature is increased by 3 degree Celsius,and pressure increased by 10%, what is the initial temperature?
Answer» If temperature is increased by 3 degree Celsius,and pressure increased by 10%, what is the initial temperature?

Discussion

105.	negetive electron gain enthalpy and positive electron gain enthalpy meaning ? WHICH IS CALLED STABLE AMONG THEM ?
Answer» negetive electron gain enthalpy and positive electron gain enthalpy meaning ? WHICH IS CALLED STABLE AMONG THEM ?

Discussion

106.	why scandium is not show +2 oxidation state
Answer» why scandium is not show +2 oxidation state

Discussion

107.	14. Show all resonance structures in the tertiary allylic
Answer» 14. Show all resonance structures in the tertiary allylic

Discussion

108.	A physical quantity Z as a function of time is given as Z(t) = A3/2 e-kt,where k = 0.1 s-1. The measurement of A has an error of 2.00%. If theerror in the measurement of time is 1.25%, then the percentage errorin the value of Z(t) at t = 10 s would be4.25%2.50%3.75%3.50%
Answer» A physical quantity Z as a function of time is given as Z(t) = A3/2 e-kt, where k = 0.1 s-1. The measurement of A has an error of 2.00%. If the error in the measurement of time is 1.25%, then the percentage error in the value of Z(t) at t = 10 s would be 4.25% 2.50% 3.75% 3.50%

Discussion

109.	the drain clener drainex contains small bits of Al which recact with castic soda to produse dihydrogen whar volume dihydrogen at 20^° c and 1 bar with be relesed when .15g Al reacts
Answer» the drain clener drainex contains small bits of Al which recact with castic soda to produse dihydrogen whar volume dihydrogen at 20^° c and 1 bar with be relesed when .15g Al reacts

Discussion

110.	Balance thr rxn Explain each step N2H4+AgNO3+KOH---N2+Ag+KNO3+H2O
Answer» Balance thr rxn Explain each step N2H4+AgNO3+KOH---N2+Ag+KNO3+H2O

Discussion

111.	21. Give reasons for the following: Write a chemical equation to represent the preparation of ethane from ethanol.
Answer» 21. Give reasons for the following: Write a chemical equation to represent the preparation of ethane from ethanol.

Discussion

112.	Calculate the pH of a solution obtained by mixing 2 mL of HCl of pH 2 and 3 mL of solution of KOH of pH = 12
Answer» Calculate the pH of a solution obtained by mixing 2 mL of HCl of pH 2 and 3 mL of solution of KOH of pH = 12

Discussion

113.	Which of the following is not poisonous?
Answer» Which of the following is not poisonous?

Discussion

114.	Assume that the mass of a nucleus is approximately given by M = Amp where A is the mass number. Estimate the density of matter in kgm−1 inside a nucleus. What is the specific gravity of nuclear matter ?
Answer» Assume that the mass of a nucleus is approximately given by M = A $m_{p}$ where A is the mass number. Estimate the density of matter in $k g m^{- 1}$ inside a nucleus. What is the specific gravity of nuclear matter ?

Discussion

115.	Nitrobenzene freezes at 278.98 ∘C. If 0.25 molal solution of a solute in nitrobenzene causes freezing point depression of 2 ∘C, then Kf (in K kg mol−1) for nitrobenzene is:
Answer» Nitrobenzene freezes at $278.98^{\circ} C$ . If $0.25$ molal solution of a solute in nitrobenzene causes freezing point depression of $2^{\circ} C$ , then $K_{f}$ (in ${K kg mol}^{- 1}$ ) for nitrobenzene is:

Discussion

116.	An α - particle with kinetic energy 10 MeV is heading towards a stationary point nucleus of atomic number 50 from large separation. Calculate the distance of closest approach
Answer» An $α$ - particle with kinetic energy 10 MeV is heading towards a stationary point nucleus of atomic number 50 from large separation. Calculate the distance of closest approach

Discussion

117.	38. Which of the following statement is incorrect? (1) Al2O3 cannot be reduced into Al by Cr2O3 (2) Ca is stronger reducing agent than Mg (3) At 673 K, CO is poor reducing agent than carbon (4) All of these
Answer» 38. Which of the following statement is incorrect? (1) Al2O3 cannot be reduced into Al by Cr2O3 (2) Ca is stronger reducing agent than Mg (3) At 673 K, CO is poor reducing agent than carbon (4) All of these

Discussion

118.	What volume of 0.5 M H2 S o4 must be added to 25 ml of 0.5M NaOH solution to make a solution in which the molarity of H2 S o4 is 0.1M
Answer» What volume of 0.5 M H2 S o4 must be added to 25 ml of 0.5M NaOH solution to make a solution in which the molarity of H2 S o4 is 0.1M

Discussion

119.	moles of kclo_{3 required forproducing sufficient o_{2 to }} react with 0.1 mole of aluminium
Answer» moles of kclo_{3 required forproducing sufficient o_{2 to }} react with 0.1 mole of aluminium

Discussion

120.	Why 2HgO on heating gives Hg+O2 ?
Answer» Why 2HgO on heating gives Hg+O₂ ?

Discussion

121.	Each unit cell of NaCl consists of :A ) 14 Cl and 13 Na B ) 6 Cl and 7 Na
Answer» Each unit cell of NaCl consists of : A ) 14 Cl and 13 Na B ) 6 Cl and 7 Na

Discussion

122.	how to find significant figures of measured value
Answer» how to find significant figures of measured value

Discussion

123.	Principle used mass spectrograph?
Answer» Principle used mass spectrograph?

Discussion

124.	30. N2 + 3H2--->2NH3 , molecular weight of NH3 and N2 are X1 and X2, their equivalent weight are Y1 and Y2, then (Y1-Y2) is (1)2X1-X2/6 (2)X1-X2 (3)3X1-X2 (4)X1-3*X2
Answer» 30. N2 + 3H2--->2NH3 , molecular weight of NH3 and N2 are X1 and X2, their equivalent weight are Y1 and Y2, then (Y1-Y2) is (1)2X1-X2/6 (2)X1-X2 (3)3X1-X2 (4)X1-3*X2

Discussion

125.

Following table represents critical temperature of some gases. Arrange these gases in their increasing order of liquefaction.GasH2HeN2O2Tc (K)33.25.3126154.3

Answer»

Following table represents critical temperature of some gases. Arrange these gases in their increasing order of liquefaction.

Gas	$H_{2}$	$H e$	$N_{2}$	$O_{2}$
$T_{c}$ $(K)$	33.2	5.3	126	154.3

Discussion

126.	The numbers of lone pairs and bond pairs in hydrazine are, respectively
Answer» The numbers of lone pairs and bond pairs in hydrazine are, respectively

Discussion

127.	The edge length of a F.C.C. cell of an ionic substance is 508 pm. If the radius of the cation is 110 pm, the radius of the anion is
Answer» The edge length of a F.C.C. cell of an ionic substance is 508 pm. If the radius of the cation is 110 pm, the radius of the anion is

Discussion

128.	Q 1/30 For the reaction, N2 +3H2 2NH3, the rateof reaction was measured as 1.25 x 10-3 mol L-1s1.The rate of change of concentration of ammonia willbe1.25 x 103 mol L1 s12.5 x 103 mol L-1 s 13.75 x 103 mol L1 s16.25 x 105 mol L1 s-1
Answer» Q 1/30 For the reaction, N2 +3H2 2NH3, the rateof reaction was measured as 1.25 x 10-3 mol L-1s1.The rate of change of concentration of ammonia willbe1.25 x 103 mol L1 s12.5 x 103 mol L-1 s 13.75 x 103 mol L1 s16.25 x 105 mol L1 s-1

Discussion

129.	Reaction by which Benzaldehyde cannot be prepared:-
Answer» Reaction by which Benzaldehyde cannot be prepared:-

Discussion

130.	33.Oxidation number of Sulphur in Na_2S_2O_3 and Na_2S_4O_6
Answer» 33.Oxidation number of Sulphur in Na_2S_2O_3 and Na_2S_4O_6

Discussion

131.	Compounds 'A' and 'B' react according to the following chemical equation. A(g)+2B(g)⟶2C(g) Concentration of either 'A' or 'B' were changed keeping the concentration of one of the reactants constant and rates were measured as a function of initial concentration. Following results were obtained. Choose the correct option for the rate equations for this reaction. ExperimentInitial Concentration of [A]/moIL−1Initial cooncentration of [B]/moIL−1Initial cooncentration of [C]/moIL−1s−11.0.300.300.102.0.300.600.403.0.600.300.20 (a)Rate=k[A]2[B] (b)Rate=k[A][B]2(c)Rate=k[A][B] (d)Rate=k[A]2[B]0
Answer» Compounds 'A' and 'B' react according to the following chemical equation. $A (g) + 2 B (g) ⟶ 2 C (g)$ Concentration of either 'A' or 'B' were changed keeping the concentration of one of the reactants constant and rates were measured as a function of initial concentration. Following results were obtained. Choose the correct option for the rate equations for this reaction. $\begin{matrix} E x p e r i m e n t & I n i t i a l C o n c e n t r a t i o n o f [A] / m o I L^{- 1} & I n i t i a l c o o n c e n t r a t i o n o f [B] / m o I L^{- 1} & I n i t i a l c o o n c e n t r a t i o n o f [C] / m o I L^{- 1} s^{- 1} 1. & 0.30 & 0.30 & 0.10 2. & 0.30 & 0.60 & 0.40 3. & 0.60 & 0.30 & 0.20 \end{matrix}$ $(a) R a t e = k [A]^{2} [B] (b) R a t e = k [A] [B]^{2} (c) R a t e = k [A] [B] (d) R a t e = k [A]^{2} [B]^{0}$

131.

Compounds 'A' and 'B' react according to the following chemical equation. A(g)+2B(g)⟶2C(g) Concentration of either 'A' or 'B' were changed keeping the concentration of one of the reactants constant and rates were measured as a function of initial concentration. Following results were obtained. Choose the correct option for the rate equations for this reaction. ExperimentInitial Concentration of [A]/moIL−1Initial cooncentration of [B]/moIL−1Initial cooncentration of [C]/moIL−1s−11.0.300.300.102.0.300.600.403.0.600.300.20 (a)Rate=k[A]2[B] (b)Rate=k[A][B]2(c)Rate=k[A][B] (d)Rate=k[A]2[B]0

Answer»

Compounds 'A' and 'B' react according to the following chemical equation.

$A (g) + 2 B (g) ⟶ 2 C (g)$

Concentration of either 'A' or 'B' were changed keeping the concentration of one of the reactants constant and rates were measured as a function of initial concentration. Following results were obtained. Choose the correct option for the rate equations for this reaction.

$\begin{matrix} E x p e r i m e n t & I n i t i a l C o n c e n t r a t i o n o f [A] / m o I L^{- 1} & I n i t i a l c o o n c e n t r a t i o n o f [B] / m o I L^{- 1} & I n i t i a l c o o n c e n t r a t i o n o f [C] / m o I L^{- 1} s^{- 1} 1. & 0.30 & 0.30 & 0.10 2. & 0.30 & 0.60 & 0.40 3. & 0.60 & 0.30 & 0.20 \end{matrix}$
$(a) R a t e = k [A]^{2} [B] (b) R a t e = k [A] [B]^{2} (c) R a t e = k [A] [B] (d) R a t e = k [A]^{2} [B]^{0}$

Discussion

132.	12. Increasing order of stability among the three main conformation (ie eclipse, anti, gauche) of 2- fluoroethanol is (a)Eclipse,gauche,anti(b)Gauche,eclipse,anti(c)Eclipse,anti,gauche(d)Anti,gauche,eclipse
Answer» 12. Increasing order of stability among the three main conformation (ie eclipse, anti, gauche) of 2- fluoroethanol is (a)Eclipse,gauche,anti(b)Gauche,eclipse,anti(c)Eclipse,anti,gauche(d)Anti,gauche,eclipse

Discussion

133.	AmongNH3,H2Oand HF, which would you expect to have highest magnitude of hydrogenbonding and why?
Answer» Among NH₃, H₂O and HF, which would you expect to have highest magnitude of hydrogen bonding and why?

Discussion

134.	Complete hydrolysis of XeF4 and XeF6 results in the formation of:
Answer» Complete hydrolysis of XeF₄ and XeF₆ results in the formation of:

Discussion

135.	37. Can oxidation number be expressed in fractions? If not what is the oxidation number of sulphur in sodium tetrathionate?
Answer» 37. Can oxidation number be expressed in fractions? If not what is the oxidation number of sulphur in sodium tetrathionate?

Discussion

136.	Identify (E) in the above reaction.
Answer» Identify (E) in the above reaction.

Discussion

137.	Nitroethane on treatment with excess of Cl2 in presence ofNaOH gives (1) ClCH2CH2NO2 (2) CH3CHClNO2 (3) Cl2CHCH2NO2 (4) CH3CCl2NO2
Answer» Nitroethane on treatment with excess of Cl2 in presence ofNaOH gives (1) ClCH2CH2NO2 (2) CH3CHClNO2 (3) Cl2CHCH2NO2 (4) CH3CCl2NO2

Discussion

138.	Which of the following have highest boiling point?(i) 0.1m NaCl(ii) 0.05m HCl(iii) 0.1m MgCl2(iv) 0.05 AlCl3
Answer» Which of the following have highest boiling point? (i) 0.1m NaCl (ii) 0.05m HCl (iii) 0.1m MgCl2 (iv) 0.05 AlCl3

Discussion

139.	The enolic form of acetone contains:
Answer» The enolic form of acetone contains:

Discussion

140.	benzene + hno3 gives A -----zndust/ aq naoh--->
Answer» benzene + hno3 gives A -----zndust/ aq naoh--->

Discussion

141.	What is the volume (in L) of a 2 M HCl solution if it contains 365 g of HCl?
Answer» What is the volume (in L) of a 2 M $H C l$ solution if it contains 365 g of $H C l$ ?

Discussion

142.	Discuss the dissociation of ionic compounds in aqueous solution.
Answer» Discuss the dissociation of ionic compounds in aqueous solution.

Discussion

143.	16. what is relation between molarity and molality ( derive it's relation)
Answer» 16. what is relation between molarity and molality ( derive it's relation)

Discussion

144.	Why line spectrum is FINGERPRINT OF AN ATOM?
Answer» Why line spectrum is FINGERPRINT OF AN ATOM?

Discussion

145.	A †an k containing water has an orifice 2m below the surface of water. If there is no wastage of energy.Find the speed of dishcharge
Answer» A †an k containing water has an orifice 2m below the surface of water. If there is no wastage of energy.Find the speed of dishcharge

Discussion

146.	a circular ring carries a charge Q, the variation of electric field with distance x measured from center along Axis for x < < R can be given as (R radius of ring)
Answer» a circular ring carries a charge Q, the variation of electric field with distance x measured from center along Axis for x < < R can be given as (R radius of ring)

Discussion

147.	the ratio between rms speed of hydrogen at 50 Kelvin and that of oxygen at 800 kelvin is
Answer» the ratio between rms speed of hydrogen at 50 Kelvin and that of oxygen at 800 kelvin is

Discussion

148.	The PE of a 2 kg particle,free to move along x- axis is given by V(x)=\lbrack x^3/3-x^2/2\rbrack J.Total mechanical energy of the particle is 4J.Maximum speed \lbrack in m/s\rbrack is?
Answer» The PE of a 2 kg particle,free to move along x- axis is given by V(x)=\lbrack x^3/3-x^2/2\rbrack J.Total mechanical energy of the particle is 4J.Maximum speed \lbrack in m/s\rbrack is?

Discussion

149.	3. Six metallic plates each with a surface area of one side A, are placed at a distance d from each other. The alternate plates are connected to points P and Q as shown in figure. The capacitance of the system is :
Answer» 3. Six metallic plates each with a surface area of one side A, are placed at a distance d from each other. The alternate plates are connected to points P and Q as shown in figure. The capacitance of the system is :

Discussion

150.	Molarity
Answer» Molarity

Discussion

Explore topic-wise InterviewSolutions in .

38. Atomic orbital is the wave function of psi for an electron in an atom expain

The isomers which can be converted into another form by rotation of molecule around single bond are

The pH value of decinormal solution of NH_4OH which is 20% ionised i

If temperature is increased by 3 degree Celsius,and pressure increased by 10%, what is the initial temperature?

negetive electron gain enthalpy and positive electron gain enthalpy meaning ? WHICH IS CALLED STABLE AMONG THEM ?

why scandium is not show +2 oxidation state

14. Show all resonance structures in the tertiary allylic

A physical quantity Z as a function of time is given as Z(t) = A3/2 e-kt,where k = 0.1 s-1. The measurement of A has an error of 2.00%. If theerror in the measurement of time is 1.25%, then the percentage errorin the value of Z(t) at t = 10 s would be4.25%2.50%3.75%3.50%​

the drain clener drainex contains small bits of Al which recact with castic soda to produse dihydrogen whar volume dihydrogen at 20^° c and 1 bar with be relesed when .15g Al reacts

Balance thr rxn Explain each step N2H4+AgNO3+KOH---N2+Ag+KNO3+H2O

21. Give reasons for the following: Write a chemical equation to represent the preparation of ethane from ethanol.

Calculate the pH of a solution obtained by mixing 2 mL of HCl of pH 2 and 3 mL of solution of KOH of pH = 12

Which of the following is not poisonous?

Assume that the mass of a nucleus is approximately given by M = Amp where A is the mass number. Estimate the density of matter in kgm−1 inside a nucleus. What is the specific gravity of nuclear matter ?

Nitrobenzene freezes at 278.98 ∘C. If 0.25 molal solution of a solute in nitrobenzene causes freezing point depression of 2 ∘C, then Kf (in K kg mol−1) for nitrobenzene is:

An α - particle with kinetic energy 10 MeV is heading towards a stationary point nucleus of atomic number 50 from large separation. Calculate the distance of closest approach

38. Which of the following statement is incorrect? (1) Al2O3 cannot be reduced into Al by Cr2O3 (2) Ca is stronger reducing agent than Mg (3) At 673 K, CO is poor reducing agent than carbon (4) All of these

What volume of 0.5 M H2 S o4 must be added to 25 ml of 0.5M NaOH solution to make a solution in which the molarity of H2 S o4 is 0.1M

moles of kclo_{3 required forproducing sufficient o_{2 to }} react with 0.1 mole of aluminium

Why 2HgO on heating gives Hg+O2 ?

Each unit cell of NaCl consists of :A ) 14 Cl and 13 Na B ) 6 Cl and 7 Na

how to find significant figures of measured value

Principle used mass spectrograph?

30. N2 + 3*H2--->2*NH3 , molecular weight of NH3 and N2 are X1 and X2, their equivalent weight are Y1 and Y2, then (Y1-Y2) is (1)2*X1-X2/6 (2)X1-X2 (3)3*X1-X2 (4)X1-3*X2

Following table represents critical temperature of some gases. Arrange these gases in their increasing order of liquefaction.GasH2HeN2O2Tc (K)33.25.3126154.3

The numbers of lone pairs and bond pairs in hydrazine are, respectively

The edge length of a F.C.C. cell of an ionic substance is 508 pm. If the radius of the cation is 110 pm, the radius of the anion is

Q 1/30 For the reaction, N2 +3H2 2NH3, the rateof reaction was measured as 1.25 x 10-3 mol L-1s1.The rate of change of concentration of ammonia willbe1.25 x 103 mol L1 s12.5 x 103 mol L-1 s 13.75 x 103 mol L1 s16.25 x 105 mol L1 s-1

Reaction by which Benzaldehyde cannot be prepared:-

33.Oxidation number of Sulphur in Na_2S_2O_3 and Na_2S_4O_6

12. Increasing order of stability among the three main conformation (ie eclipse, anti, gauche) of 2- fluoroethanol is (a)Eclipse,gauche,anti(b)Gauche,eclipse,anti(c)Eclipse,anti,gauche(d)Anti,gauche,eclipse

AmongNH3,H2Oand HF, which would you expect to have highest magnitude of hydrogenbonding and why?

Complete hydrolysis of XeF4 and XeF6 results in the formation of:

37. Can oxidation number be expressed in fractions? If not what is the oxidation number of sulphur in sodium tetrathionate?

Identify (E) in the above reaction.

Nitroethane on treatment with excess of Cl2 in presence ofNaOH gives (1) ClCH2CH2NO2 (2) CH3CHClNO2 (3) Cl2CHCH2NO2 (4) CH3CCl2NO2

Which of the following have highest boiling point?(i) 0.1m NaCl(ii) 0.05m HCl(iii) 0.1m MgCl2(iv) 0.05 AlCl3

The enolic form of acetone contains:

benzene + hno3 gives A -----zndust/ aq naoh--->

What is the volume (in L) of a 2 M HCl solution if it contains 365 g of HCl?

Discuss the dissociation of ionic compounds in aqueous solution.

16. what is relation between molarity and molality ( derive it's relation)

Why line spectrum is FINGERPRINT OF AN ATOM?

A †an k containing water has an orifice 2m below the surface of water. If there is no wastage of energy.Find the speed of dishcharge

a circular ring carries a charge Q, the variation of electric field with distance x measured from center along Axis for x < < R can be given as (R radius of ring)

the ratio between rms speed of hydrogen at 50 Kelvin and that of oxygen at 800 kelvin is

The PE of a 2 kg particle,free to move along x- axis is given by V(x)=\lbrack x^3/3-x^2/2\rbrack J.Total mechanical energy of the particle is 4J.Maximum speed \lbrack in m/s\rbrack is?

3. Six metallic plates each with a surface area of one side A, are placed at a distance d from each other. The alternate plates are connected to points P and Q as shown in figure. The capacitance of the system is :

Molarity

A physical quantity Z as a function of time is given as Z(t) = A3/2 e-kt,where k = 0.1 s-1. The measurement of A has an error of 2.00%. If theerror in the measurement of time is 1.25%, then the percentage errorin the value of Z(t) at t = 10 s would be4.25%2.50%3.75%3.50%

30. N2 + 3H2--->2NH3 , molecular weight of NH3 and N2 are X1 and X2, their equivalent weight are Y1 and Y2, then (Y1-Y2) is (1)2X1-X2/6 (2)X1-X2 (3)3X1-X2 (4)X1-3*X2