46295 + Interview Questions in Chemistry

1.	Calculate the concentration i.e., %(w/v) of the solution (BaCl2 in H2O). If 10 g of BaCl2 is dissolved in 90 g of water. The density of the solution is 1.09 g/mL.
Answer» Calculate the concentration i.e., $% (w / v)$ of the solution ( $B a C l_{2} in H_{2} O$ ). If $10 g$ of $B a C l_{2}$ is dissolved in $90 g$ of water. The density of the solution is $1.09 g/mL$ .

Discussion

2.	what is kuchervous reaction
Answer» what is kuchervous reaction

Discussion

3.	10 g of ice at 0 ice at 00C is mixed with m mass of water at 500 C. What is minimum value of m so that ice melts completely?( L = 80 cal/g and s = 1 cal/ g-0C)
Answer» 10 g of ice at 0 ice at 0⁰C is mixed with m mass of water at 50⁰ C. What is minimum value of m so that ice melts completely?( L = 80 cal/g and s = 1 cal/ g-⁰C)

Discussion

4.	Two equal negative charges , -q are fixed at points (0,-a) , (0,a) on y axis . A positive charge Q is released from rest at point (2a,0) on the X axis . The charge Q will1). Execute simple harmonic motion2). Move to the origin and remains at rest3). Move to infinity4). Execute oscillatory but not simple harmonic motion
Answer» Two equal negative charges , -q are fixed at points (0,-a) , (0,a) on y axis . A positive charge Q is released from rest at point (2a,0) on the X axis . The charge Q will 1). Execute simple harmonic motion 2). Move to the origin and remains at rest 3). Move to infinity 4). Execute oscillatory but not simple harmonic motion

Discussion

5.	Ion with highest polarizing power is ______.
Answer» Ion with highest polarizing power is ______.

Discussion

6.	Which will be adsorbed more readily on the surface of charcoal and why :NH3or CO2
Answer» Which will be adsorbed more readily on the surface of charcoal and why :NH3or CO2

Discussion

7.	Carbon carbon double bond is considered a stereocenter ; is C-C "TRIPLE BOND" also a stereocenter ?
Answer» Carbon carbon double bond is considered a stereocenter ; is C-C "TRIPLE BOND" also a stereocenter ?

Discussion

8.	How many primary, secondary, tertiary and quaternary carbons are present in the following hydrocarbon CH3−CH(CH3)−C(CH3)2−CH2−CH(CH3)−CH2−CH3
Answer» How many primary, secondary, tertiary and quaternary carbons are present in the following hydrocarbon $C H_{3} - C H (C H_{3}) - C (C H_{3})_{2} - C H_{2} - C H (C H_{3}) - C H_{2} - C H_{3}$

8.

How many primary, secondary, tertiary and quaternary carbons are present in the following hydrocarbon CH3−CH(CH3)−C(CH3)2−CH2−CH(CH3)−CH2−CH3

Answer»

How many primary, secondary, tertiary and quaternary carbons are present in the following hydrocarbon

$C H_{3} - C H (C H_{3}) - C (C H_{3})_{2} - C H_{2} - C H (C H_{3}) - C H_{2} - C H_{3}$

Discussion

9.	Que1.which has maximum equilibrium molarity of sodium ion in 0.1 M aqueous solution (assume 100 %ionization) (a)sodium oxalate (b) Sodium orthophosphate (c) Sodium metaphosphate (d) Sodium bicarbonate
Answer» Que1.which has maximum equilibrium molarity of sodium ion in 0.1 M aqueous solution (assume 100 %ionization) (a)sodium oxalate (b) Sodium orthophosphate (c) Sodium metaphosphate (d) Sodium bicarbonate

Discussion

10.	ntIf the pressure of H2 gas is increased from 1 atm to 100 atm keeping hydrgen ion concentration constant at 1M find voltage of hydrogen half cell at 25^°C A 0.0295 V B -0.0295 V c -0.059 v D 0.059Vn
Answer» ntIf the pressure of H2 gas is increased from 1 atm to 100 atm keeping hydrgen ion concentration constant at 1M find voltage of hydrogen half cell at 25^°C A 0.0295 V B -0.0295 V c -0.059 v D 0.059Vn

Discussion

11.	Three infinitely long charge sheets are placed as shown in figure. The electric field at point P is
Answer» Three infinitely long charge sheets are placed as shown in figure. The electric field at point P is

Discussion

12.	How many spherical nodes are there in 4s – sub-shell?
Answer» How many spherical nodes are there in $4 s$ – sub-shell?

Discussion

13.	Theneutron separation energy is defined as the energy required to removea neutron from the nucleus. Obtain the neutron separation energies ofthe nuclei andfromthe following data:=39.962591 u)= 40.962278 u=25.986895 u)= 26.981541 u
Answer» The neutron separation energy is defined as the energy required to remove a neutron from the nucleus. Obtain the neutron separation energies of the nuclei and from the following data: = 39.962591 u ) = 40.962278 u = 25.986895 u ) = 26.981541 u

13.

Theneutron separation energy is defined as the energy required to removea neutron from the nucleus. Obtain the neutron separation energies ofthe nuclei andfromthe following data:=39.962591 u)= 40.962278 u=25.986895 u)= 26.981541 u

Answer»

The
neutron separation energy is defined as the energy required to remove
a neutron from the nucleus. Obtain the neutron separation energies of
the nuclei
and

from
the following data:

=
39.962591 u

)
= 40.962278 u

=
25.986895 u

)
= 26.981541 u

Discussion

14.	Arrange the elements of group 13 in the increasing order of ionisation potential. Do provide an explanation for the exceptional Trend.
Answer» Arrange the elements of group 13 in the increasing order of ionisation potential. Do provide an explanation for the exceptional Trend.

Discussion

15.	A solution contains 2 moles of sugar. What volume of solution give rise to an osmotic pressure of 1 atm at 27∘C?
Answer» A solution contains 2 moles of sugar. What volume of solution give rise to an osmotic pressure of $1 a t m a t 27^{\circ} C ?$

Discussion

16.	1 mole of diatomic element X2 contains 34 and 40 moles of electron and neutron respectively. The isotopic formula of the element is
Answer» 1 mole of diatomic element $X_{2}$ contains 34 and 40 moles of electron and neutron respectively. The isotopic formula of the element is

Discussion

17.	What is equivalent mass. What is oleum
Answer» What is equivalent mass. What is oleum

Discussion

18.	a sample of a radioactive substance undergo 80% decomposition in 345 minutes its half life is
Answer» a sample of a radioactive substance undergo 80% decomposition in 345 minutes its half life is

Discussion

19.	The electron affinity values (in kJ mol−1) of three halogens x, y and z are respectively -349, -333 and -325. Then x, y and z are respectively
Answer» The electron affinity values $(i n k J m o l^{- 1})$ of three halogens x, y and z are respectively -349, -333 and -325. Then x, y and z are respectively

Discussion

20.	Can you use soaps and detergents to check the hardness of water ?
Answer» Can you use soaps and detergents to check the hardness of water ?

Discussion

21.	A regenerative Brayton refrigeration working between pressure limit of 1 and 3 bar. The temperature and pressure of air at inlet of compressor is 270 K and 1 bar respectively. Compressed air enters regenerative heat exchanger at temperature of 310 K and exit at a temperature of 280 K. The refrigeration effect is 30 kJ/kg. The effectiveness of heat exchanger is ____.Assume compression and expansion are isentropic(Take γ for air = 1.4 and cp for air = 1.005 kJ/kgK)(Correct upto 3 decimal place)0.397
Answer» A regenerative Brayton refrigeration working between pressure limit of 1 and 3 bar. The temperature and pressure of air at inlet of compressor is 270 K and 1 bar respectively. Compressed air enters regenerative heat exchanger at temperature of 310 K and exit at a temperature of 280 K. The refrigeration effect is 30 kJ/kg. The effectiveness of heat exchanger is ____. Assume compression and expansion are isentropic (Take $γ$ for air = 1.4 and $c_{p}$ for air = 1.005 kJ/kgK) (Correct upto 3 decimal place) 0.397

Discussion

22.	calculate the mass of MnO2 needed to produce 1.78 litres of chlorine gas at STP according to the equation MnO2 + 4HCl → MnCl2 + 2H2O + Cl2 [H = 1, Cl = 35.5, Mn = 54.9]
Answer» calculate the mass of $M n O_{2}$ needed to produce 1.78 litres of chlorine gas at STP according to the equation $M n O_{2}$ + 4HCl $\to$ $M n C l_{2}$ + 2 $H_{2} O$ + $C l_{2}$ [H = 1, Cl = 35.5, Mn = 54.9]

22.

calculate the mass of MnO2 needed to produce 1.78 litres of chlorine gas at STP according to the equation MnO2 + 4HCl → MnCl2 + 2H2O + Cl2 [H = 1, Cl = 35.5, Mn = 54.9]

Answer»

calculate the mass of $M n O_{2}$ needed to produce 1.78 litres of chlorine gas at STP according to the equation
$M n O_{2}$ + 4HCl $\to$ $M n C l_{2}$ + 2 $H_{2} O$ + $C l_{2}$

[H = 1, Cl = 35.5, Mn = 54.9]

Discussion

23.	If the mole fraction of zinc chloride in water is 0.3 what is molality of the solution?
Answer» If the mole fraction of zinc chloride in water is 0.3 what is molality of the solution?

Discussion

24.	59. What is controlled chain reaction and uncontrolled chain reaction explain by process
Answer» 59. What is controlled chain reaction and uncontrolled chain reaction explain by process

Discussion

25.	For the reaction A->B, doubling the concentration of both the reactants increases the reaction rate by 8 times and doubling the concentration of only B simply doubles the reaction rate. Find the rate law for the above equation.
Answer» For the reaction A->B, doubling the concentration of both the reactants increases the reaction rate by 8 times and doubling the concentration of only B simply doubles the reaction rate. Find the rate law for the above equation.

Discussion

26.	The Azimuthal quantum number for the valence electrons of Ga+ ion is . (Atomic number of Ga = 31)
Answer» The Azimuthal quantum number for the valence electrons of $G a^{+}$ ion is . (Atomic number of Ga = 31)

Discussion

27.	Why sucrose is called invert sugar
Answer» Why sucrose is called invert sugar

Discussion

28.	26. Heat of dissociation of acetic acid is 0.005 kcal per g hence enthalpy change when 1 mol of calcium hydroxide is completely neutrilised is?
Answer» 26. Heat of dissociation of acetic acid is 0.005 kcal per g hence enthalpy change when 1 mol of calcium hydroxide is completely neutrilised is?

Discussion

29.	During electrolysis, Al+3 molecules are formed at cathode and O2 is formed at anode. Rectify the error in the above statement.
Answer» During electrolysis, ${A l}^{+ 3}$ molecules are formed at cathode and $O_{2}$ is formed at anode. Rectify the error in the above statement.

29.

During electrolysis, Al+3 molecules are formed at cathode and O2 is formed at anode. Rectify the error in the above statement.

Answer»

During electrolysis, ${A l}^{+ 3}$ molecules are formed at cathode and $O_{2}$ is formed at anode.

Rectify the error in the above statement.

Discussion

30.	2 moles of an ideal gas are compressed isothermally reversibly from a pressure of 10 atm to 25 atm then find the free energy change
Answer» 2 moles of an ideal gas are compressed isothermally reversibly from a pressure of 10 atm to 25 atm then find the free energy change

Discussion

31.	IS THE FOLLOWING REACTION CORRECT -CL2+H2O-- 2HCL +\lbrack O
Answer» IS THE FOLLOWING REACTION CORRECT -CL2+H2O-- 2HCL +\lbrack O

Discussion

32.	In a face centerd lattice of X and Y, X atoms are present at the corners while Y atoms are at the face centers. If two X atoms are removed from the corners, the formula of the compound would be:
Answer» In a face centerd lattice of X and Y, X atoms are present at the corners while Y atoms are at the face centers. If two X atoms are removed from the corners, the formula of the compound would be:

Discussion

33.	Chargaff's rule states that in an organism [CBSE PMT 2003]
Answer» Chargaff's rule states that in an organism [CBSE PMT 2003]

33.

Chargaff's rule states that in an organism [CBSE PMT 2003]

Answer»

Chargaff's rule states that in an organism

[CBSE PMT 2003]

Discussion

34.	40. When a metal is burnt in presence of oxygen, its weight is increased by 25%. The equivalent weight of the metal will be
Answer» 40. When a metal is burnt in presence of oxygen, its weight is increased by 25%. The equivalent weight of the metal will be

Discussion

35.	52.In carbylamine reaction (1) The nucleophile is RNH2 and electrophile is CCl2 (2) The nucleophile is primary amine and electrophile is CCl3 negative (3) The nucleophile is CCl3 negative and the electrophile is primary amine (4) The attacking reagent is electrophile
Answer» 52.In carbylamine reaction (1) The nucleophile is RNH2 and electrophile is CCl2 (2) The nucleophile is primary amine and electrophile is CCl3 negative (3) The nucleophile is CCl3 negative and the electrophile is primary amine (4) The attacking reagent is electrophile

Discussion

36.	CHOCHO (glyoxal) react with 50% NaOH solution to give what as product
Answer» CHOCHO (glyoxal) react with 50% NaOH solution to give what as product

Discussion

37.	Which substance cannot be reduced by H2O2
Answer» Which substance cannot be reduced by $H_{2} O_{2}$

Discussion

38.	1 mole of a diatomic gas present in a 10 L vessel at a certain temperature exerts a pressure of 0.96 atm. Under similar conditions, an ideal gas exerts 1.0 atm pressure. If the volume of a gas molecule is negligible, then find the value of the van der Waals’ constant ‘a′ (in atm L2/mol2).
Answer» 1 mole of a diatomic gas present in a 10 L vessel at a certain temperature exerts a pressure of 0.96 atm. Under similar conditions, an ideal gas exerts 1.0 atm pressure. If the volume of a gas molecule is negligible, then find the value of the van der Waals’ constant $‘ a^{'}$ (in ${atm L}^{2} / {mol}^{2}$ ).

Discussion

39.	what is term of electron microscope
Answer» what is term of electron microscope

Discussion

40.	According to Kohlrausch law, the limiting value of molar conductivity of an strong electrolyte A2B is given by:
Answer» According to Kohlrausch law, the limiting value of molar conductivity of an strong electrolyte $A_{2} B$ is given by:

Discussion

41.	What is hydrogen spectrum
Answer» What is hydrogen spectrum

Discussion

42.	Lanthanoids are :
Answer» Lanthanoids are :

Discussion

43.	Is [Zn(gly)2] optically active?
Answer» Is [Zn(gly)2] optically active?

Discussion

44.	What hybrid orbitals will form the following compound H3C-CH=CH-CH2-CH3
Answer» What hybrid orbitals will form the following compound H₃C-CH=CH-CH₂-CH₃

Discussion

45.	10. estimate the minimum potential difference needed to reduce Al2O3 at 500 C . the free energy change for decomposition reaction 2/3 Al2O3 -> 4/3 Al + O2 is 960KJ
Answer» 10. estimate the minimum potential difference needed to reduce Al2O3 at 500 C . the free energy change for decomposition reaction 2/3 Al2O3 -> 4/3 Al + O2 is 960KJ

Discussion

46.	In the question arrange the compounds in increasing order of rate of reaction towards nucleophilic substitution. (a) (iii) < (ii) < (i) (b) (ii) < (iii) < (i) (c) (i) < (iii) < (ii) (d) (i) < (ii) < (iii)
Answer» In the question arrange the compounds in increasing order of rate of reaction towards nucleophilic substitution. (a) (iii) < (ii) < (i) (b) (ii) < (iii) < (i) (c) (i) < (iii) < (ii) (d) (i) < (ii) < (iii)

46.

In the question arrange the compounds in increasing order of rate of reaction towards nucleophilic substitution. (a) (iii) < (ii) < (i) (b) (ii) < (iii) < (i) (c) (i) < (iii) < (ii) (d) (i) < (ii) < (iii)

Answer»

In the question arrange the compounds in increasing order of rate of reaction towards nucleophilic substitution.

(a) (iii) < (ii) < (i) (b) (ii) < (iii) < (i)

(c) (i) < (iii) < (ii) (d) (i) < (ii) < (iii)

Discussion

47.	14. Number of tetrahedral void(s) per atom present in cubic closed pack structure is: a) 2 b) 4 c) 8 d) 1
Answer» 14. Number of tetrahedral void(s) per atom present in cubic closed pack structure is: a) 2 b) 4 c) 8 d) 1

Discussion

48.	the molecule that has linear structure isA)CO2B)NO2C)SO2D)SIO2
Answer» the molecule that has linear structure is A)CO2 B)NO2 C)SO2 D)SIO2

Discussion

49.	What are the limitations of quantum mechanical model of atom?Explain about g orbital
Answer» What are the limitations of quantum mechanical model of atom? Explain about g orbital

Discussion

50.	The relative Lewis acid strengths of boron trihalides are in the order:
Answer» The relative Lewis acid strengths of boron trihalides are in the order:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Calculate the concentration i.e., %(w/v) of the solution (BaCl2 in H2O). If 10 g of BaCl2 is dissolved in 90 g of water. The density of the solution is 1.09 g/mL.

what is kuchervous reaction

10 g of ice at 0 ice at 00C is mixed with m mass of water at 500 C. What is minimum value of m so that ice melts completely?( L = 80 cal/g and s = 1 cal/ g-0C)

Ion with highest polarizing power is ______.

Which will be adsorbed more readily on the surface of charcoal and why :NH3or CO2

Carbon carbon double bond is considered a stereocenter ; is C-C "TRIPLE BOND" also a stereocenter ?

How many primary, secondary, tertiary and quaternary carbons are present in the following hydrocarbon CH3−CH(CH3)−C(CH3)2−CH2−CH(CH3)−CH2−CH3

Que1.which has maximum equilibrium molarity of sodium ion in 0.1 M aqueous solution (assume 100 %ionization) (a)sodium oxalate (b) Sodium orthophosphate (c) Sodium metaphosphate (d) Sodium bicarbonate

ntIf the pressure of H2 gas is increased from 1 atm to 100 atm keeping hydrgen ion concentration constant at 1M find voltage of hydrogen half cell at 25^°C A 0.0295 V B -0.0295 V c -0.059 v D 0.059Vn

Three infinitely long charge sheets are placed as shown in figure. The electric field at point P is

How many spherical nodes are there in 4s – sub-shell?

Theneutron separation energy is defined as the energy required to removea neutron from the nucleus. Obtain the neutron separation energies ofthe nuclei andfromthe following data:=39.962591 u)= 40.962278 u=25.986895 u)= 26.981541 u

Arrange the elements of group 13 in the increasing order of ionisation potential. Do provide an explanation for the exceptional Trend.

A solution contains 2 moles of sugar. What volume of solution give rise to an osmotic pressure of 1 atm at 27∘C?

1 mole of diatomic element X2 contains 34 and 40 moles of electron and neutron respectively. The isotopic formula of the element is

What is equivalent mass. What is oleum

a sample of a radioactive substance undergo 80% decomposition in 345 minutes its half life is

The electron affinity values (in kJ mol−1) of three halogens x, y and z are respectively -349, -333 and -325. Then x, y and z are respectively

Can you use soaps and detergents to check the hardness of water ?

calculate the mass of MnO2 needed to produce 1.78 litres of chlorine gas at STP according to the equation MnO2 + 4HCl → MnCl2 + 2H2O + Cl2 [H = 1, Cl = 35.5, Mn = 54.9]

If the mole fraction of zinc chloride in water is 0.3 what is molality of the solution?

59. What is controlled chain reaction and uncontrolled chain reaction explain by process

For the reaction A->B, doubling the concentration of both the reactants increases the reaction rate by 8 times and doubling the concentration of only B simply doubles the reaction rate. Find the rate law for the above equation.

The Azimuthal quantum number for the valence electrons of Ga+ ion is . (Atomic number of Ga = 31)

Why sucrose is called invert sugar

26. Heat of dissociation of acetic acid is 0.005 kcal per g hence enthalpy change when 1 mol of calcium hydroxide is completely neutrilised is?

During electrolysis, Al+3 molecules are formed at cathode and O2 is formed at anode. Rectify the error in the above statement.

2 moles of an ideal gas are compressed isothermally reversibly from a pressure of 10 atm to 25 atm then find the free energy change

IS THE FOLLOWING REACTION CORRECT -CL2+H2O-- 2HCL +\lbrack O

In a face centerd lattice of X and Y, X atoms are present at the corners while Y atoms are at the face centers. If two X atoms are removed from the corners, the formula of the compound would be:

Chargaff's rule states that in an organism [CBSE PMT 2003]

40. When a metal is burnt in presence of oxygen, its weight is increased by 25%. The equivalent weight of the metal will be

52.In carbylamine reaction (1) The nucleophile is RNH2 and electrophile is CCl2 (2) The nucleophile is primary amine and electrophile is CCl3 negative (3) The nucleophile is CCl3 negative and the electrophile is primary amine (4) The attacking reagent is electrophile

CHOCHO (glyoxal) react with 50% NaOH solution to give what as product

Which substance cannot be reduced by H2O2

1 mole of a diatomic gas present in a 10 L vessel at a certain temperature exerts a pressure of 0.96 atm. Under similar conditions, an ideal gas exerts 1.0 atm pressure. If the volume of a gas molecule is negligible, then find the value of the van der Waals’ constant ‘a′ (in atm L2/mol2).

what is term of electron microscope

According to Kohlrausch law, the limiting value of molar conductivity of an strong electrolyte A2B is given by:

What is hydrogen spectrum

Lanthanoids are :

Is [Zn(gly)2] optically active?

What hybrid orbitals will form the following compound H3C-CH=CH-CH2-CH3

10. estimate the minimum potential difference needed to reduce Al2O3 at 500 C . the free energy change for decomposition reaction 2/3 Al2O3 -> 4/3 Al + O2 is 960KJ

In the question arrange the compounds in increasing order of rate of reaction towards nucleophilic substitution. (a) (iii) &lt; (ii) &lt; (i) (b) (ii) &lt; (iii) &lt; (i) (c) (i) &lt; (iii) &lt; (ii) (d) (i) &lt; (ii) &lt; (iii)

14. Number of tetrahedral void(s) per atom present in cubic closed pack structure is: a) 2 b) 4 c) 8 d) 1

the molecule that has linear structure isA)CO2B)NO2C)SO2D)SIO2

What are the limitations of quantum mechanical model of atom?Explain about g orbital

The relative Lewis acid strengths of boron trihalides are in the order:

In the question arrange the compounds in increasing order of rate of reaction towards nucleophilic substitution. (a) (iii) < (ii) < (i) (b) (ii) < (iii) < (i) (c) (i) < (iii) < (ii) (d) (i) < (ii) < (iii)