46295 + Interview Questions in Chemistry

1.	How hyperconjugation affects acidity or basicity and stability...
Answer» How hyperconjugation affects acidity or basicity and stability...

Discussion

2.	Following equilibrium is established at 300 K in a 2.463 L vessel. A(l)⇌A(g); K=19 torr Calculate the number of particles of A(g).
Answer» Following equilibrium is established at $300 K$ in a $2.463 L$ vessel. $A (l) ⇌ A (g)$ ; $K = 19 torr$ Calculate the number of particles of $A (g)$ .

Discussion

3.	in which of the following is more covalent. cesium iodide or lithum iodide
Answer» in which of the following is more covalent. cesium iodide or lithum iodide

Discussion

4.	The latent heat of fusion of ice is 330 J/g. Calculate the number of photons of radiation of frequency 5×1013s−1 to cause the melting of 1 mole of ice. Take h=6.6×10−34 Js Express your answer as X×1022, what is the value of 'X'
Answer» The latent heat of fusion of ice is 330 J/g. Calculate the number of photons of radiation of frequency $5 \times 10^{13} s^{- 1}$ to cause the melting of 1 mole of ice. Take $h = 6.6 \times 10^{- 34} J s$ Express your answer as $X \times 10^{22},$ what is the value of 'X'

Discussion

5.	Which of the following is the correct order for the stability of the following resonating structures?
Answer» Which of the following is the correct order for the stability of the following resonating structures?

Discussion

6.	In the given molecule choose the correct order of their angle.
Answer» In the given molecule choose the correct order of their angle.

6.

In the given molecule choose the correct order of their angle.

Answer»

In the given molecule choose the correct order of their angle.

Discussion

7.	The Hybridisation of O atom in H2O is
Answer» The Hybridisation of O atom in $H_{2} O$ is

Discussion

8.	On what basis we get to know that which catalyst is used for given reaction ?
Answer» On what basis we get to know that which catalyst is used for given reaction ?

Discussion

9.	If half cell reaction A+e-. --->A has a large negative reduction potential what does a follow in that?
Answer» If half cell reaction A+e-. --->A has a large negative reduction potential what does a follow in that?

Discussion

10.	The ratio of the rate of diffusion of helium and methane under identical condition of pressure and temperature will be___.
Answer» The ratio of the rate of diffusion of helium and methane under identical condition of pressure and temperature will be___.

Discussion

11.	Calculate the mole fraction of benzene in a solution containing 30% by mass of carbon tetrachloride
Answer» Calculate the mole fraction of benzene in a solution containing 30% by mass of carbon tetrachloride

Discussion

12.	Why negative value cant be in case of kelvin scale?
Answer» Why negative value cant be in case of kelvin scale?

Discussion

13.	What is forbidden zone ?
Answer» What is forbidden zone ?

Discussion

14.	Density of a mixture of CO and CO2 at 303K and 73cm of Hg is 1.5gm/L. What is the mole percent of the the two gases in mixture.
Answer» Density of a mixture of CO and CO2 at 303K and 73cm of Hg is 1.5gm/L. What is the mole percent of the the two gases in mixture.

Discussion

15.	Be2C + H2O → BeO + x CaC2 + H2O → Ca(OH)2 + y Mg2C3 + H2O → Mg(OH)2 + z. x,y & z are respectively
Answer» $B e_{2} C + H_{2} O \to B e O + x$ $C a C_{2} + H_{2} O \to C a (O H)_{2} + y$ $M g_{2} C_{3} + H_{2} O \to M g (O H)_{2} + z$ . $x, y$ & $z$ are respectively

15.

Be2C + H2O → BeO + x CaC2 + H2O → Ca(OH)2 + y Mg2C3 + H2O → Mg(OH)2 + z. x,y & z are respectively

Answer»

$B e_{2} C + H_{2} O \to B e O + x$

$C a C_{2} + H_{2} O \to C a (O H)_{2} + y$

$M g_{2} C_{3} + H_{2} O \to M g (O H)_{2} + z$ .

$x, y$ & $z$ are respectively

Discussion

16.	Which of the following compounds will react with sodium hydroxide solution in water? (a) C6H5OH (b) C6H5CH2OH (c) (CH3)3COH (d) C2H5OH
Answer» Which of the following compounds will react with sodium hydroxide solution in water? (a) $C_{6} H_{5} O H$ (b) $C_{6} H_{5} C H_{2} O H$ (c) $(C H_{3})_{3} C O H$ (d) $C_{2} H_{5} O H$

Discussion

17.	Which is a true statement?
Answer» Which is a true statement?

Discussion

18.	Electron pairs will repel each other. Then why, the dipole moment arrow always points towards lone pair. Since niyrogen has protons also, why arrow pointing towards lone pair??
Answer» Electron pairs will repel each other. Then why, the dipole moment arrow always points towards lone pair. Since niyrogen has protons also, why arrow pointing towards lone pair??

Discussion

19.	Which one of the elements of group-13 has the lowest ionization energy?
Answer» Which one of the elements of group-13 has the lowest ionization energy?

Discussion

20.	Which property of colloids is applied in rubber plating & sewage disposal?
Answer» Which property of colloids is applied in rubber plating & sewage disposal?

Discussion

21.	Order of decreasing basic strengths of halides is :
Answer» Order of decreasing basic strengths of halides is :

Discussion

22.	suggests that a process is spontaneous
Answer» suggests that a process is spontaneous

Discussion

23.	If the solubility product of PbI2 is 3.2×10−8, its solubility will be
Answer» If the solubility product of $P b I_{2}$ is $3.2 \times 10^{- 8}$ , its solubility will be

Discussion

24.	What fraction of an indicator HIn is in basic form at a pH of 6 if the pKa of the indicator is 5 ?
Answer» What fraction of an indicator $H I n$ is in basic form at a $p H$ of $6$ if the $p K_{a}$ of the indicator is $5$ ?

Discussion

25.	How can we calculate the number of neutrons present in a particular atom??
Answer» How can we calculate the number of neutrons present in a particular atom??

Discussion

26.	Arrange CFC,CH4,N2O and CO2 in decreasing order according to their contribution in global warming.
Answer» Arrange $C F C, C H_{4}, N_{2} O$ and $C O_{2}$ in decreasing order according to their contribution in global warming.

Discussion

27.	Does word orbital have double meaning, viz: a mathematical equation (wave function) and a region of an atom where electron may be found ?
Answer» Does word orbital have double meaning, viz: a mathematical equation (wave function) and a region of an atom where electron may be found ?

Discussion

28.	Two elements A & B of 3rd and 4th periods are such that B. E. of A-A, B-B & A-B are 81 eV, 63 eV and 76 eV respectively. The electronegativity of B is 2.4. What will be the electronegativity of 'A' approximately?
Answer» Two elements A & B of $3^{r d}$ and $4^{t h}$ periods are such that B. E. of A-A, B-B & A-B are $81 e V$ , $63 e V$ and $76 e V$ respectively. The electronegativity of B is 2.4. What will be the electronegativity of 'A' approximately?

Discussion

29.	The states of hybridization of boron in boric acid (H3BO3) and (BF3) are respectively
Answer» The states of hybridization of boron in boric acid ( $H_{3} B O_{3}$ ) and ( $B F_{3}$ ) are respectively

Discussion

30.	what is the use of rate constant?..what does it tells us?
Answer» what is the use of rate constant?..what does it tells us?

Discussion

31.	Why CO2 is not considered as an organic compound?
Answer» Why $C O_{2}$ is not considered as an organic compound?

Discussion

32.	Calculate the volume of 10 moles of H2 gas at STP.
Answer» Calculate the volume of 10 moles of $H_{2}$ gas at STP.

Discussion

33.	If x g is the mass of NaHC2O4 is required to neutralise 100 mL of 0.2 (M) NaOH and y g is required to reduce 100 mL of 0.02 (M) KMnO4 in acidic medium, then:
Answer» If x $g$ is the mass of $N a H C_{2} O_{4}$ is required to neutralise 100 mL of 0.2 (M) $N a O H$ and y $g$ is required to reduce 100 mL of 0.02 (M) $K M n O_{4}$ in acidic medium, then:

Discussion

34.	The final product C, obtained in this reaction is:
Answer» The final product C, obtained in this reaction is:

Discussion

35.	Products of electrolysis of dilute H2SO4 solution are:
Answer» Products of electrolysis of dilute $H_{2} S O_{4}$ solution are:

Discussion

36.	3TiO2 +4C+ 6Cl2 - 3Ticl4+2CO2+ 2CO A vessel contains 4.32gTiO2, 5.76g C and 7.1g Cl2, suppose the reaction goes to completion as written, how many gram of TiCl4 can be produced?
Answer» 3TiO₂ +4C+ 6Cl₂ - 3Ticl4+2CO₂+ 2CO A vessel contains 4.32gTiO_2,5.76g C and 7.1g Cl_2,suppose the reaction goes to completion as written, how many gram of TiCl₄can be produced?

Discussion

37.	Al2O3 can be converted to anhydrous AlCl3 by heating.
Answer» $A l_{2} O_{3}$ can be converted to anhydrous $A l C l_{3}$ by heating.

Discussion

38.	The number of sodium atoms in 2 moles of sodium ferrocyanide Na4[Fe(CN)6] is:
Answer» The number of sodium atoms in $2$ moles of sodium ferrocyanide $N a_{4} [F e (C N)_{6}]$ is:

Discussion

39.	Among Al2O3, SiO2, P2O3, and SO3 the correct order of acid strength is
Answer» Among $A l_{2} O_{3}, S i O_{2}, P_{2} O_{3}, a n d S O_{3}$ the correct order of acid strength is

Discussion

40.	Which solids do not have definite melting point ? And why ? a) crystals b) poly crystals c) amphorous solids d) quartz
Answer» Which solids do not have definite melting point ? And why ? a) crystals b) poly crystals c) amphorous solids d) quartz

Discussion

41.	The rate of the reaction 2N2O5→4NO2+O2 can be written in three ways: −d[N2O5]dt=k[N2O5] d[NO2]dt=k′[N2O5] d[O2]dt=k′′[N2O5] The relationship between k, k′ and between k, k′′ are:
Answer» The rate of the reaction $2 N_{2} O_{5} \to 4 N O_{2} + O_{2}$ can be written in three ways: $\frac{- d [N_{2} O_{5}]}{d t} = k [N_{2} O_{5}]$ $\frac{d [N O_{2}]}{d t} = k^{^{'}} [N_{2} O_{5}]$ $\frac{d [O_{2}]}{d t} = k^{''} [N_{2} O_{5}]$ The relationship between $k$ , $k^{^{'}}$ and between $k$ , $k^{''}$ are:

Discussion

42.	What mass of ethylene glycol (M.W. = 62.1 g/mol) antifreeze must be added to 10.0 mL of water to produce a solution that freezes at -186 °C. Density of water is 1g / mL and Kf = l.86 °C/m.
Answer» What mass of ethylene glycol (M.W. = 62.1 g/mol) antifreeze must be added to 10.0 mL of water to produce a solution that freezes at -186 °C. Density of water is 1g / mL and K_f = l.86 °C/m.

Discussion

43.	Two or more compounds having the same molecular formula but different functional groups are called:
Answer» Two or more compounds having the same molecular formula but different functional groups are called:

Discussion

44.	Increasing the temperature of solution of a weak electrolyte will cause
Answer» Increasing the temperature of solution of a weak electrolyte will cause

Discussion

45.	What is the material used in push button lighter or gas lighter?
Answer» What is the material used in push button lighter or gas lighter?

Discussion

46.	Which one of the following sets of properties do you associate with oxygen gas?
Answer» Which one of the following sets of properties do you associate with oxygen gas?

Discussion

47.	What is the relation between edge length (a) and radius of sphere (r) for a body centered cubic unit cell?
Answer» What is the relation between edge length (a) and radius of sphere (r) for a body centered cubic unit cell?

47.

What is the relation between edge length (a) and radius of sphere (r) for a body centered cubic unit cell?

Answer»

What is the relation between edge length (a) and radius of sphere (r) for a body centered cubic unit cell?

Discussion

48.	Which one of the following method is neither meant for the synthesis nor for separation of amines?
Answer» Which one of the following method is neither meant for the synthesis nor for separation of amines?

Discussion

49.	Which of the following is liable to be oxidised by periodic acid ?
Answer» Which of the following is liable to be oxidised by periodic acid ?

Discussion

50.	The enthalpy of sublimation of Aluminium is 330 kJ/mol. Its Ist, IInd and IIIrd ionization enthalpies are 580, 1820 and 2740 kJ respectively. How much heat has to be supplied (in kJ) to convert 13.5 gram of Aluminium into Al3+ ions and electrons at 298 K ?
Answer» The enthalpy of sublimation of Aluminium is 330 kJ/mol. Its Ist, IInd and IIIrd ionization enthalpies are 580, 1820 and 2740 kJ respectively. How much heat has to be supplied (in kJ) to convert 13.5 gram of Aluminium into Al3+ ions and electrons at 298 K ?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

How hyperconjugation affects acidity or basicity and stability...

Following equilibrium is established at 300 K in a 2.463 L vessel. A(l)⇌A(g); K=19 torr Calculate the number of particles of A(g).

in which of the following is more covalent. cesium iodide or lithum iodide

The latent heat of fusion of ice is 330 J/g. Calculate the number of photons of radiation of frequency 5×1013s−1 to cause the melting of 1 mole of ice. Take h=6.6×10−34 Js Express your answer as X×1022, what is the value of 'X'

Which of the following is the correct order for the stability of the following resonating structures?

In the given molecule choose the correct order of their angle.

The Hybridisation of O atom in H2O is

On what basis we get to know that which catalyst is used for given reaction ?

If half cell reaction A+e-. --->A has a large negative reduction potential what does a follow in that?

The ratio of the rate of diffusion of helium and methane under identical condition of pressure and temperature will be___.

Calculate the mole fraction of benzene in a solution containing 30% by mass of carbon tetrachloride

Why negative value cant be in case of kelvin scale?

What is forbidden zone ?

Density of a mixture of CO and CO2 at 303K and 73cm of Hg is 1.5gm/L. What is the mole percent of the the two gases in mixture.

Be2C + H2O → BeO + x CaC2 + H2O → Ca(OH)2 + y Mg2C3 + H2O → Mg(OH)2 + z. x,y &amp; z are respectively

Which of the following compounds will react with sodium hydroxide solution in water? (a) C6H5OH (b) C6H5CH2OH (c) (CH3)3COH (d) C2H5OH

Which is a true statement?

Electron pairs will repel each other. Then why, the dipole moment arrow always points towards lone pair. Since niyrogen has protons also, why arrow pointing towards lone pair??

Which one of the elements of group-13 has the lowest ionization energy?

Which property of colloids is applied in rubber plating &amp; sewage disposal?

Order of decreasing basic strengths of halides is :

suggests that a process is spontaneous

If the solubility product of PbI2 is 3.2×10−8, its solubility will be

What fraction of an indicator HIn is in basic form at a pH of 6 if the pKa of the indicator is 5 ?

How can we calculate the number of neutrons present in a particular atom??

Arrange CFC,CH4,N2O and CO2 in decreasing order according to their contribution in global warming.

Does word orbital have double meaning, viz: a mathematical equation (wave function) and a region of an atom where electron may be found ?

Two elements A & B of 3rd and 4th periods are such that B. E. of A-A, B-B & A-B are 81 eV, 63 eV and 76 eV respectively. The electronegativity of B is 2.4. What will be the electronegativity of 'A' approximately?

The states of hybridization of boron in boric acid (H3BO3) and (BF3) are respectively

what is the use of rate constant?..what does it tells us?

Why CO2 is not considered as an organic compound?

Calculate the volume of 10 moles of H2 gas at STP.

If x g is the mass of NaHC2O4 is required to neutralise 100 mL of 0.2 (M) NaOH and y g is required to reduce 100 mL of 0.02 (M) KMnO4 in acidic medium, then:

The final product C, obtained in this reaction is:

Products of electrolysis of dilute H2SO4 solution are:

3TiO2 +4C+ 6Cl2 - 3Ticl4+2CO2+ 2CO A vessel contains 4.32gTiO2, 5.76g C and 7.1g Cl2, suppose the reaction goes to completion as written, how many gram of TiCl4 can be produced?

Al2O3 can be converted to anhydrous AlCl3 by heating.

The number of sodium atoms in 2 moles of sodium ferrocyanide Na4[Fe(CN)6] is:

Among Al2O3, SiO2, P2O3, and SO3 the correct order of acid strength is

Which solids do not have definite melting point ? And why ? a) crystals b) poly crystals c) amphorous solids d) quartz

The rate of the reaction 2N2O5→4NO2+O2 can be written in three ways: −d[N2O5]dt=k[N2O5] d[NO2]dt=k′[N2O5] d[O2]dt=k′′[N2O5] The relationship between k, k′ and between k, k′′ are:

What mass of ethylene glycol (M.W. = 62.1 g/mol) antifreeze must be added to 10.0 mL of water to produce a solution that freezes at -186 °C. Density of water is 1g / mL and Kf = l.86 °C/m.

Two or more compounds having the same molecular formula but different functional groups are called:

Increasing the temperature of solution of a weak electrolyte will cause

What is the material used in push button lighter or gas lighter?

Which one of the following sets of properties do you associate with oxygen gas?

What is the relation between edge length (a) and radius of sphere (r) for a body centered cubic unit cell?

Which one of the following method is neither meant for the synthesis nor for separation of amines?

Which of the following is liable to be oxidised by periodic acid ?

The enthalpy of sublimation of Aluminium is 330 kJ/mol. Its Ist, IInd and IIIrd ionization enthalpies are 580, 1820 and 2740 kJ respectively. How much heat has to be supplied (in kJ) to convert 13.5 gram of Aluminium into Al3+ ions and electrons at 298 K ?

Be2C + H2O → BeO + x CaC2 + H2O → Ca(OH)2 + y Mg2C3 + H2O → Mg(OH)2 + z. x,y & z are respectively

Which property of colloids is applied in rubber plating & sewage disposal?