46295 + Interview Questions in Chemistry

1.	The octahedral complex of a metal ion M3+ with four monodentate ligands L1,L2,L3 and L4 absorb wavelength in the region of red, green, yellow and blue, respectively. The increasing order of ligand strength of the four ligands is :
Answer» The octahedral complex of a metal ion $M^{3 +}$ with four monodentate ligands $L_{1}, L_{2}, L_{3} and L_{4}$ absorb wavelength in the region of red, green, yellow and blue, respectively. The increasing order of ligand strength of the four ligands is :

Discussion

2.	1 mole of H2SO4 is mixed with excess of NaOH in a dilute solution. The enthalpy change is nearly equal to
Answer» 1 mole of $H_{2} S O_{4}$ is mixed with excess of NaOH in a dilute solution. The enthalpy change is nearly equal to

Discussion

3.	The standard enthalpies of formation of CO2(g),H2O(l) and glucose(s) at 25oC are –400 kJ/ mol,–300‘kJ/ mol and –1300 kJ/ mol, respectively. The standard enthalpy of combustion per gram of glucose at 25oC is
Answer» The standard enthalpies of formation of $C O_{2} (g), H_{2} O (l)$ and glucose(s) at $25^{o} C$ are $- 400 k J / m o l, - 300 ‘ k J / m o l$ and $- 1300 k J / m o l,$ respectively. The standard enthalpy of combustion per gram of glucose at $25^{o} C$ is

Discussion

4.	13.6 eV is needed for ionisation of a hydrogen atom. An electron in a hydrogen atom in its ground state absorbs 1.50 times as much energy as the minimum energy required for it to escape from the atom. What is the wavelength and velocity of the emitted electron?
Answer» $13.6 e V$ is needed for ionisation of a hydrogen atom. An electron in a hydrogen atom in its ground state absorbs $1.50$ times as much energy as the minimum energy required for it to escape from the atom. What is the wavelength and velocity of the emitted electron?

Discussion

5.	When should the atomicity be used in finding the number of atoms?
Answer» When should the atomicity be used in finding the number of atoms?

Discussion

6.	In an alpha decay the mass number of an element decreases by __.
Answer» In an alpha decay the mass number of an element decreases by __.

Discussion

7.	A sample of an ideal gas occupies 20 L under a pressure of 0.5 atm. Under isothermal conditions, on increasing its pressure to 1.0 atm, its volume will be:
Answer» A sample of an ideal gas occupies $20 L$ under a pressure of 0.5 atm. Under isothermal conditions, on increasing its pressure to 1.0 atm, its volume will be:

Discussion

8.	The increasing order of atomic radii of the following elements is:
Answer» The increasing order of atomic radii of the following elements is:

Discussion

9.	26 How many cyclic structural isomers are possible of C5H10 ?
Answer» 26 How many cyclic structural isomers are possible of C5H10 ?

Discussion

10.	The graph between ln(xm) and ln(p) is a straight line inclined at an angle of 45∘ where x is the mass of the solute absorbed and m is the mass of the absorbent while p is the pressure of the gas in atm. When the pressure is 0.5 atm and ln(k)=0.693 where k is the Freundlich constant, then what amount of solute will be adsorbed by 12 g of the adsorbent?
Answer» The graph between $l n (\frac{x}{m})$ and $l n (p)$ is a straight line inclined at an angle of $45^{\circ}$ where x is the mass of the solute absorbed and m is the mass of the absorbent while p is the pressure of the gas in atm. When the pressure is 0.5 atm and $l n (k) = 0.693$ where k is the Freundlich constant, then what amount of solute will be adsorbed by 12 g of the adsorbent?

Discussion

11.	Consider the cell Cu / Cu^2+ \| \| Ag^+ / Ag. if the concentration of Cu^2+ and Ag^+ ions becomes ten times the emf of the cell :-(1) Becomes 10 times(2) Remains same(3) Increase by 0.0295 V(4) Decrease by 0.0295 V
Answer» Consider the cell Cu / Cu^2+ \| \| Ag^+ / Ag. if the concentration of Cu^2+ and Ag^+ ions becomes ten times the emf of the cell :- (1) Becomes 10 times (2) Remains same (3) Increase by 0.0295 V (4) Decrease by 0.0295 V

Discussion

12.	In subs†an ce Mg(HXO_3), the oxidation number of X is:- (1)0 (2)+2 (3)+3 (4)+4
Answer» In subs†an ce Mg(HXO_3), the oxidation number of X is:- (1)0 (2)+2 (3)+3 (4)+4

Discussion

13.	which is most UNSTABLE Xef6,XeF4,XeF2?
Answer» which is most UNSTABLE Xef6,XeF4,XeF2?

Discussion

14.	Among the following, the correct order of acidity is
Answer» Among the following, the correct order of acidity is

Discussion

15.	47. Which is more covalent MgO or nacl
Answer» 47. Which is more covalent MgO or nacl

Discussion

16.	Arrange the following in the increasing order of their boiling points:CH3CH2OH,CH3COCH3,CH3COOH
Answer» Arrange the following in the increasing order of their boiling points: $C H_{3} C H_{2} O H, C H_{3} C O C H_{3}, C H_{3} C O O H$

Discussion

17.	Rounding off
Answer» Rounding off

Discussion

18.	Anomalous behaviour of water in lakes
Answer» Anomalous behaviour of water in lakes

Discussion

19.	58. Why Ph3C+ is more stable than CH2=CH-CH2+
Answer» 58. Why Ph3C+ is more stable than CH2=CH-CH2+

Discussion

20.	for the given half cell, Al3+ + 3e- -------> Al, on increasing [Al3+], the electrode potential
Answer» for the given half cell, Al3+ + 3e- -------> Al, on increasing [Al3+], the electrode potential

Discussion

21.	From the following compounds, which has the highest enol content?
Answer» From the following compounds, which has the highest enol content?

Discussion

22.	CH3CHO +\:HCHO \overset{conc . KOH}{→?
Answer» CH3CHO +\:HCHO \overset{conc . KOH}{→?

Discussion

23.	In which of the following reactions, only single isomer of alkene is formed?
Answer» In which of the following reactions, only single isomer of alkene is formed?

Discussion

24.	What is the ratio of volume of 1 mole of nitrogen gas to 16g oxygen gas at STP
Answer» What is the ratio of volume of 1 mole of nitrogen gas to 16g oxygen gas at STP

Discussion

25.	Order of dipole moment of hydrids of group 15
Answer» Order of dipole moment of hydrids of group 15

Discussion

26.	In a constant volume calorimeter, 3.5 g of a gas with molecular weight 28 was burnt in excess of oxygen at 298 k. The temperature of the calorimeter was found to Increase from 298 k to 298.45 k due to the combustion process. Given that the heat capacity of the calorimeter is 2.5 KJ/K. The Numerical value for the enthalpy of combustion of the Gas in KJ /Mole is
Answer» In a constant volume calorimeter, $3.5 g$ of a gas with molecular weight 28 was burnt in excess of oxygen at $298 k$ . The temperature of the calorimeter was found to Increase from $298 k$ to $298.45 k$ due to the combustion process. Given that the heat capacity of the calorimeter is $2.5 K J / K$ . The Numerical value for the enthalpy of combustion of the Gas in KJ /Mole is

Discussion

27.	37.A : ethyne and its derivatives give white ppt with tollens reagent R: alkynes give white ppt due to Sn reaction
Answer» 37.A : ethyne and its derivatives give white ppt with tollens reagent R: alkynes give white ppt due to Sn reaction

Discussion

28.	In the reaction C2O2−4+MnO−4+H+→Mn2++CO2+H2O the reductant is
Answer» In the reaction $C_{2} O_{4}^{2 -} + M n O_{4}^{-} + H^{+} \to M n^{2 +} + C O_{2} + H_{2} O$ the reductant is

Discussion

29.	The correct order of decreasing bond energy is-(1) O-O> S- S> Se - Se(2) C - C> Si - Si > Ge - Ge(3) F - F> O-O >N-N(4) F - F> Cl - Cl> Br - Br give detailed explanati
Answer» The correct order of decreasing bond energy is-(1) O-O> S- S> Se - Se(2) C - C> Si - Si > Ge - Ge(3) F - F> O-O >N-N(4) F - F> Cl - Cl> Br - Br give detailed explanati

Discussion

30.	In SN2 reaction, the correct order of reactivity for the following compounds is:CH3Cl,CH3CH2Cl,(CH3)2CHCl and (CH3)3CCl
Answer» In $S_{N} 2$ reaction, the correct order of reactivity for the following compounds is: $C H_{3} C l, C H_{3} C H_{2} C l, (C H_{3})_{2} C H C l$ and $(C H_{3})_{3} C C l$

Discussion

31.	38.Number of geometrical isomers possible for MABCDEF
Answer» 38.Number of geometrical isomers possible for MABCDEF

Discussion

32.	A mixture of N2 and CO2 at one atm pressure contains 56% by weight of N2 . Partial pressure of N2 in the mixture will be:a)0.56 atm b)0.44 atm c)0.677 atm d)0.33 atm
Answer» A mixture of $N_{2}$ and $C O_{2}$ at one atm pressure contains 56% by weight of $N_{2}$ . Partial pressure of $N_{2}$ in the mixture will be: a)0.56 atm b)0.44 atm c)0.677 atm d)0.33 atm

32.

A mixture of N2 and CO2 at one atm pressure contains 56% by weight of N2 . Partial pressure of N2 in the mixture will be:a)0.56 atm b)0.44 atm c)0.677 atm d)0.33 atm

Answer»

A mixture of $N_{2}$ and $C O_{2}$ at one atm pressure contains 56% by weight of $N_{2}$ . Partial pressure of $N_{2}$ in the mixture will be:

a)0.56 atm

b)0.44 atm

c)0.677 atm

d)0.33 atm

Discussion

33.	The diamagnetic species is
Answer» The diamagnetic species is

Discussion

34.	Why in K2Mno4 all bond lengths aren't equal?
Answer» Why in K2Mno4 all bond lengths aren't equal?

Discussion

35.	Calculate the osmotic pressure of a solution containing 6.00 g urea and 9.00 g glucose in a one litre of solution at 27oC.
Answer» Calculate the osmotic pressure of a solution containing $6.00 g$ urea and $9.00 g$ glucose in a one litre of solution at $27^{o} C$ .

Discussion

36.	Calculate the volume of HNO_3 ( sp. gravity 1.05 gm/ml containing 12.6 w/W of HNO_3 ) that reduce into NO is required to oxidise iron 1 g FeSO_4.7H_2O in acid medium. (a)70ml (b)0.57ml (c)80ml (d)0.65ml
Answer» Calculate the volume of HNO_3 ( sp. gravity 1.05 gm/ml containing 12.6 w/W of HNO_3 ) that reduce into NO is required to oxidise iron 1 g FeSO_4.7H_2O in acid medium. (a)70ml (b)0.57ml (c)80ml (d)0.65ml

Discussion

37.	Why does the change in entropy of the universe has to be positive forthe reaction to be spontaneous?
Answer» Why does the change in entropy of the universe has to be positive forthe reaction to be spontaneous?

Discussion

38.	difference between inter-molecular force of attraction and bond wrt covalent compounds?
Answer» difference between inter-molecular force of attraction and bond wrt covalent compounds?

Discussion

39.	4. R-C(triple bond)C-H + Na gives product X. X on reaction with Y gives R-C(triple bond)C-R. The reagent Y can be : 1) RMgBr 2) RCl 3) RNH2 4) RH
Answer» 4. R-C(triple bond)C-H + Na gives product X. X on reaction with Y gives R-C(triple bond)C-R. The reagent Y can be : 1) RMgBr 2) RCl 3) RNH2 4) RH

Discussion

40.	47. The vapour pressure of water at room temperature is lowered by 5% by dissolving a solute in it, then the approximate molality of solution is ??
Answer» 47. The vapour pressure of water at room temperature is lowered by 5% by dissolving a solute in it, then the approximate molality of solution is ??

Discussion

41.	If each orbital can hold max 3electron then find max elements in9 preiod
Answer» If each orbital can hold max 3electron then find max elements in9 preiod

Discussion

42.	How many P−H bonds does hypophosphorous acid contain?
Answer» How many $P - H$ bonds does hypophosphorous acid contain?

Discussion

43.	72 Balance MnO4-+H2C2O4------>Mn2+ +Co2+h2o by oxidation number method
Answer» 72 Balance MnO4-+H2C2O4------>Mn2+ +Co2+h2o by oxidation number method

Discussion

44.	what does it mean when we say that standard of unit must be reproducible?
Answer» what does it mean when we say that standard of unit must be reproducible?

Discussion

45.	how to find whether the pi orbitals are lying insame plane or not in ,alkane , alkeneand alkyn
Answer» how to find whether the pi orbitals are lying insame plane or not in ,alkane , alkeneand alkyn

Discussion

46.	Whatis the minimum volume of water required to dissolve 1g of calciumsulphate at 298 K? (For calcium sulphate, Kspis 9.1 × 10–6).
Answer» What is the minimum volume of water required to dissolve 1g of calcium sulphate at 298 K? (For calcium sulphate, K_sp is 9.1 × 10^–6).

Discussion

47.	Define magnitude?
Answer» Define magnitude?

Discussion

48.	1.84 g of mixture of CaCO3 and MgCO3 is heated and CO₂ is produced. If the amount of CO₂ produced by CaCO3 and MgCO3 is equal. How much CaCO3 is present in the mixture.
Answer» 1.84 g of mixture of CaCO3 and MgCO3 is heated and CO₂ is produced. If the amount of CO₂ produced by CaCO3 and MgCO3 is equal. How much CaCO3 is present in the mixture.

Discussion

49.	Which of the following compounds has the highest percentage of ionic character?
Answer» Which of the following compounds has the highest percentage of ionic character?

Discussion

50.	The smell of hot sizzling food reaches you several meters away, but to get the smell from cold food you have to go close. Explain the reason.
Answer» The smell of hot sizzling food reaches you several meters away, but to get the smell from cold food you have to go close. Explain the reason.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The octahedral complex of a metal ion M3+ with four monodentate ligands L1,L2,L3 and L4 absorb wavelength in the region of red, green, yellow and blue, respectively. The increasing order of ligand strength of the four ligands is :

1 mole of H2SO4 is mixed with excess of NaOH in a dilute solution. The enthalpy change is nearly equal to

The standard enthalpies of formation of CO2(g),H2O(l) and glucose(s) at 25oC are –400 kJ/ mol,–300‘kJ/ mol and –1300 kJ/ mol, respectively. The standard enthalpy of combustion per gram of glucose at 25oC is

13.6 eV is needed for ionisation of a hydrogen atom. An electron in a hydrogen atom in its ground state absorbs 1.50 times as much energy as the minimum energy required for it to escape from the atom. What is the wavelength and velocity of the emitted electron?

When should the atomicity be used in finding the number of atoms?

In an alpha decay the mass number of an element decreases by __.

A sample of an ideal gas occupies 20 L under a pressure of 0.5 atm. Under isothermal conditions, on increasing its pressure to 1.0 atm, its volume will be:

The increasing order of atomic radii of the following elements is:

26 How many cyclic structural isomers are possible of C5H10 ?

Consider the cell Cu / Cu^2+ | | Ag^+ / Ag. if the concentration of Cu^2+ and Ag^+ ions becomes ten times the emf of the cell :-(1) Becomes 10 times(2) Remains same(3) Increase by 0.0295 V(4) Decrease by 0.0295 V

In subs†an ce Mg(HXO_3), the oxidation number of X is:- (1)0 (2)+2 (3)+3 (4)+4

which is most UNSTABLE Xef6,XeF4,XeF2?

Among the following, the correct order of acidity is

47. Which is more covalent MgO or nacl

Arrange the following in the increasing order of their boiling points:CH3CH2OH,CH3COCH3,CH3COOH

Rounding off

Anomalous behaviour of water in lakes

58. Why Ph3C+ is more stable than CH2=CH-CH2+

for the given half cell, Al3+ + 3e- -------> Al, on increasing [Al3+], the electrode potential

From the following compounds, which has the highest enol content?

CH3CHO +\:HCHO \overset{conc . KOH}{→?

In which of the following reactions, only single isomer of alkene is formed?

What is the ratio of volume of 1 mole of nitrogen gas to 16g oxygen gas at STP

Order of dipole moment of hydrids of group 15

37.A : ethyne and its derivatives give white ppt with tollens reagent R: alkynes give white ppt due to Sn reaction

In the reaction C2O2−4+MnO−4+H+→Mn2++CO2+H2O the reductant is

The correct order of decreasing bond energy is-(1) O-O> S- S> Se - Se(2) C - C> Si - Si > Ge - Ge(3) F - F> O-O >N-N(4) F - F> Cl - Cl> Br - Br give detailed explanati

In SN2 reaction, the correct order of reactivity for the following compounds is:CH3Cl,CH3CH2Cl,(CH3)2CHCl and (CH3)3CCl

38.Number of geometrical isomers possible for MABCDEF

A mixture of N2 and CO2 at one atm pressure contains 56% by weight of N2 . Partial pressure of N2 in the mixture will be:a)0.56 atm b)0.44 atm c)0.677 atm d)0.33 atm

The diamagnetic species is

Why in K2Mno4 all bond lengths aren't equal?

Calculate the osmotic pressure of a solution containing 6.00 g urea and 9.00 g glucose in a one litre of solution at 27oC.

Calculate the volume of HNO_3 ( sp. gravity 1.05 gm/ml containing 12.6 w/W of HNO_3 ) that reduce into NO is required to oxidise iron 1 g FeSO_4.7H_2O in acid medium. (a)70ml (b)0.57ml (c)80ml (d)0.65ml

Why does the change in entropy of the universe has to be positive forthe reaction to be spontaneous?

difference between inter-molecular force of attraction and bond wrt covalent compounds?

4. R-C(triple bond)C-H + Na gives product X. X on reaction with Y gives R-C(triple bond)C-R. The reagent Y can be : 1) RMgBr 2) RCl 3) RNH2 4) RH

47. The vapour pressure of water at room temperature is lowered by 5% by dissolving a solute in it, then the approximate molality of solution is ??

If each orbital can hold max 3electron then find max elements in9 preiod

How many P−H bonds does hypophosphorous acid contain?

72 Balance MnO4-+H2C2O4------>Mn2+ +Co2+h2o by oxidation number method

what does it mean when we say that standard of unit must be reproducible?

how to find whether the pi orbitals are lying insame plane or not in ,alkane , alkeneand alkyn

Whatis the minimum volume of water required to dissolve 1g of calciumsulphate at 298 K? (For calcium sulphate, Kspis 9.1 × 10–6).

Define magnitude?

1.84 g of mixture of CaCO3 and MgCO3 is heated and CO₂ is produced. If the amount of CO₂ produced by CaCO3 and MgCO3 is equal. How much CaCO3 is present in the mixture.

Which of the following compounds has the highest percentage of ionic character?

The smell of hot sizzling food reaches you several meters away, but to get the smell from cold food you have to go close. Explain the reason.