46295 + Interview Questions in Chemistry

1.	if rhombohedral and trigonal are same then why they are taken 2 different types unit cells in bravias lattice ?
Answer» if rhombohedral and trigonal are same then why they are taken 2 different types unit cells in bravias lattice ?

Discussion

2.	0.96 gm of NaOH and KOH mixture reacts with 50 ml of 0.1 M h2so4 .find out the mass percentage of NaOH on mixtur
Answer» 0.96 gm of NaOH and KOH mixture reacts with 50 ml of 0.1 M h2so4 .find out the mass percentage of NaOH on mixtur

Discussion

3.	Minimum distance between two tetrahedral voids if a is the edge length of the cube isOptions:(1) a/2(2) a/4(3) a/2√2(4) √3a/4
Answer» Minimum distance between two tetrahedral voids if a is the edge length of the cube is Options: (1) a/2 (2) a/4 (3) a/2√2 (4) √3a/4

Discussion

4.	One mole of an ideal gas undergoes a process P = P0 (1 + (2V0V)2]−1,where P0, V0 are constants. Change in temperature of the gas when volume is changed from V=V0to V=2V0 is nPoV0R. Then n is
Answer» One mole of an ideal gas undergoes a process $P = P_{0} {(1 + {(\frac{2 V_{0}}{V})}^{2}]}^{- 1},$ where $P_{0}, V_{0}$ are constants. Change in temperature of the gas when volume is changed from $V = V_{0}$ to $V = 2 V_{0}$ is $\frac{n P_{o} V_{0}}{R}$ . Then $n$ is

Discussion

5.	what is peniciline?
Answer» what is peniciline?

Discussion

6.	Comparethe general characteristics of the first series of the transitionmetals with those of the second and third series metals in therespective vertical columns. Give special emphasis on the followingpoints:(i) electronicconfigurations, (ii) oxidationstates,(iii) ionisationenthalpies, and(iv) atomicsizes.
Answer» Compare the general characteristics of the first series of the transition metals with those of the second and third series metals in the respective vertical columns. Give special emphasis on the following points: (i) electronic configurations, (ii) oxidation states, (iii) ionisation enthalpies, and (iv) atomic sizes.

6.

Comparethe general characteristics of the first series of the transitionmetals with those of the second and third series metals in therespective vertical columns. Give special emphasis on the followingpoints:(i) electronicconfigurations, (ii) oxidationstates,(iii) ionisationenthalpies, and(iv) atomicsizes.

Answer»

Compare
the general characteristics of the first series of the transition
metals with those of the second and third series metals in the
respective vertical columns. Give special emphasis on the following
points:

(i) electronic
configurations,

(ii) oxidation
states,

(iii) ionisation
enthalpies, and

(iv) atomic
sizes.

Discussion

7.	36. A inert gas obeys the law Pyx for what 36.Qvalue of x, It has negative molar specific heat(I) x 1.67(2) x < 1.67sed 37
Answer» 36. A inert gas obeys the law Pyx for what 36.Qvalue of x, It has negative molar specific heat(I) x 1.67(2) x < 1.67sed 37

Discussion

8.	Why in ethylene all four atomic orbitals does not show hybridisation ? Why there is sp2 hybridisation ?
Answer» Why in ethylene all four atomic orbitals does not show hybridisation ? Why there is sp2 hybridisation ?

Discussion

9.	The reaction products of C6H5OCH3+HIΔ→ is :
Answer» The reaction products of $C_{6} H_{5} O C H_{3} + H I Δ \to$ is :

Discussion

10.	Give two characteristics of a mixture? Explain with an example of each.
Answer» Give two characteristics of a mixture? Explain with an example of each.

Discussion

11.	200 mL of an aqueous solution of a protein contains its 1.26 g. The osmotic pressure of this solution at 300 K is found to be 2.52×10−3 bar. The molar mass of protein will be(R=0.08 L bar mol−1 K−1)
Answer» $200 mL$ of an aqueous solution of a protein contains its $1.26 g$ . The osmotic pressure of this solution at $300 K$ is found to be $2.52 \times 10^{- 3}$ bar. The molar mass of protein will be $(R = 0.08 {L bar mol}^{- 1} K^{- 1})$

Discussion

12.	Cot 7 .5
Answer» Cot 7 .5

Discussion

13.	What is a dimeric anion ?
Answer» What is a dimeric anion ?

Discussion

14.	When A ∝ B, the graph is a straight line passing through
Answer» When $A$ ∝ $B$ , the graph is a straight line passing through

Discussion

15.	How to find the number of atoms?
Answer» How to find the number of atoms?

Discussion

16.	i mol of \lbrack Ag\rbrack Ag+ sol is coagulated by 1)100 ml 1M k2SO4 2)Fe3+ 3)1 mol of Na+ 4)none of these
Answer» i mol of \lbrack Ag\rbrack Ag+ sol is coagulated by 1)100 ml 1M k2SO4 2)Fe3+ 3)1 mol of Na+ 4)none of these

Discussion

17.	Which of the following hydrocarbon can undergo addition reaction? CH4 , C2H6, C2H4 , C3H6
Answer» Which of the following hydrocarbon can undergo addition reaction? ${CH}_{4}$ , $C_{2}$ $H_{6}$ , $C_{2}$ $H_{4}$ , $C_{3}$ $H_{6}$

Discussion

18.	Why ice cold condition is necessary for preparation of benzene diazonium chloride
Answer» Why ice cold condition is necessary for preparation of benzene diazonium chloride

Discussion

19.	Which one of the following compounds will be most readily dehydrated?
Answer» Which one of the following compounds will be most readily dehydrated?

Discussion

20.	For which of the following reactions is △ H≠△ E and why?\:(A) H_2+I_2\overset{}{→2HI (B) HCl(aq)+NaOH(aq)}\overset{}{→ NaCl(aq)+H_2O (C)C(s)+O2=CO2 (d)N2+3H2=2NH
Answer» For which of the following reactions is △ H≠△ E and why?\:(A) H_2+I_2\overset{}{→2HI (B) HCl(aq)+NaOH(aq)}\overset{}{→ NaCl(aq)+H_2O (C)C(s)+O2=CO2 (d)N2+3H2=2NH

Discussion

21.	What is meant by aqueous solution
Answer» What is meant by aqueous solution

Discussion

22.	The conductance of 0.01N Ch3cooh solution is 4.5/10000 ohm which is present in a tube having length 6 cm and cross section area 36cm20.the molar Conductivity of the solution is
Answer» The conductance of 0.01N Ch3cooh solution is 4.5/10000 ohm which is present in a tube having length 6 cm and cross section area 36cm20.the molar Conductivity of the solution is

Discussion

23.	11. Q1-Mole fraction of solvent in aqueous solution of NaOH have molality of 3 is
Answer» 11. Q1-Mole fraction of solvent in aqueous solution of NaOH have molality of 3 is

Discussion

24.	48. Number of g of in 32.2g na2so4.10h2o is
Answer» 48. Number of g of in 32.2g na2so4.10h2o is

Discussion

25.	Explain the statement - "Charge is QUANTIZED".
Answer» Explain the statement - "Charge is QUANTIZED".

Discussion

26.	Which of the following is not an electrophile?
Answer» Which of the following is not an electrophile?

Discussion

27.	For a reaction A⇌P, the plots of [A] and [P] with time temperatrues T1 and T2 are given below.If T2>T1, the correct statement(s) is (are) (Assume ΔHθ and ΔSθ are independent of temperature and ratio of ln K at T1 to lnK at T2 is greater than T2T1. Here H, S, G and K are enthalpy, entropy, Gibbs energy and equilibrium constant, respectively.)
Answer» For a reaction $A ⇌ P$ , the plots of [A] and [P] with time temperatrues $T_{1}$ and $T_{2}$ are given below. If $T_{2} > T_{1}$ , the correct statement(s) is (are) (Assume $Δ H^{θ}$ and $Δ S^{θ}$ are independent of temperature and ratio of ln K at $T_{1}$ to lnK at $T_{2}$ is greater than $\frac{T_{2}}{T_{1}}$ . Here H, S, G and K are enthalpy, entropy, Gibbs energy and equilibrium constant, respectively.)

Discussion

28.	Which of the following statement(s) is/are correct when a mixture of NaCl and K2Cr2O7 are gently warmed with conc. H2SO4 ?
Answer» Which of the following statement(s) is/are correct when a mixture of $N a C l$ and $K_{2} C r_{2} O_{7}$ are gently warmed with conc. $H_{2} S O_{4}$ ?

Discussion

29.	In the given reaction 3I_2 +OH^-→ IO_3^- 5I^- 2 moles of iodine are taken then the ratio of iodate and iodide ions formed in the alkaline medium i
Answer» In the given reaction 3I_2 +OH^-→ IO_3^- 5I^- 2 moles of iodine are taken then the ratio of iodate and iodide ions formed in the alkaline medium i

Discussion

30.	1 mg of Thorium in each minute emits 22 alpha-particles per unit solid angle. Find half-life of Thorium?
Answer» 1 mg of Thorium in each minute emits 22 alpha-particles per unit solid angle. Find half-life of Thorium?

Discussion

31.	Where r octahedral voids r present in unit cell?
Answer» Where r octahedral voids r present in unit cell?

Discussion

32.	How C2 has only pie bonds according to not.
Answer» How C2 has only pie bonds according to not.

Discussion

33.	what happens when sodium metal is placed in moist air?
Answer» what happens when sodium metal is placed in moist air?

Discussion

34.	The oxygen molecule has a mass of 5.30 × 10–26 kg and a moment of inertia of 1.94×10–46 kg m2 about an axis through its centre perpendicular to the lines joining the two atoms. Suppose the mean speed of such a molecule in a gas is 500 m/s and that its kinetic energy of rotation is two thirds of its kinetic energy of translation. Find the average angular velocity of the molecule.
Answer» The oxygen molecule has a mass of 5.30 × 10^–26 kg and a moment of inertia of 1.94×10^–46 kg m² about an axis through its centre perpendicular to the lines joining the two atoms. Suppose the mean speed of such a molecule in a gas is 500 m/s and that its kinetic energy of rotation is two thirds of its kinetic energy of translation. Find the average angular velocity of the molecule.

Discussion

35.	In a YDSE setup the two slits are 2 mm apart and screen is placed at distance of 2 m from slits. The slits are illuminated with bi-chromatic beam of light of wavelength 400 nm and 500 nm. The minimum distnace from central line where bright fringes of both wavelength coincide (other than central fringe) is
Answer» In a YDSE setup the two slits are $2 m m$ apart and screen is placed at distance of $2 m$ from slits. The slits are illuminated with bi-chromatic beam of light of wavelength $400 n m$ and $500 n m$ . The minimum distnace from central line where bright fringes of both wavelength coincide (other than central fringe) is

Discussion

36.	A compound contains 6.4% by mass of oxygen. It contains two moles of oxygen atoms per mole of the compound. What is the molar mass of the compound?
Answer» A compound contains $6.4 %$ by mass of oxygen. It contains two moles of oxygen atoms per mole of the compound. What is the molar mass of the compound?

Discussion

37.	At 400 K, the rate constant of a chemical reaction is 3×10−4s−1 and at 300 K, the rate constant is 6×10−5s−1. Find the value of Ea i.e. activation energy required for the reaction. Take:log10(0.2)=0.7
Answer» At $400 K$ , the rate constant of a chemical reaction is $3 \times 10^{- 4} s^{- 1}$ and at $300 K$ , the rate constant is $6 \times 10^{- 5} s^{- 1}$ . Find the value of $E_{a}$ i.e. activation energy required for the reaction. Take: ${log}_{10} (0.2) = 0.7$

Discussion

38.	What is lechalteirs law in chemical equilibria
Answer» What is lechalteirs law in chemical equilibria

Discussion

39.	On what basis we decide bravias lattice 14 different types of unit cells?or we just need to learn?
Answer» On what basis we decide bravias lattice 14 different types of unit cells?or we just need to learn?

Discussion

40.	A p-type semiconductor has acceptor levels 57 meV above the valence band. The maximum wavelength of light required to create a hole is (Planck's constant h= 6.6×10−34J−s)
Answer» A p-type semiconductor has acceptor levels 57 $m e V$ above the valence band. The maximum wavelength of light required to create a hole is (Planck's constant h= $6.6 \times 10^{- 34} J - s$ )

Discussion

41.	Nucleophilic addition across the carbonyl will be the best for:
Answer» Nucleophilic addition across the carbonyl will be the best for:

Discussion

42.	For the given reaction : Which of the following can be the reactant (R)?
Answer» For the given reaction : Which of the following can be the reactant (R)?

Discussion

43.	Which halogen shows an oxidation state of -1 only?
Answer» Which halogen shows an oxidation state of -1 only?

Discussion

44.	if f(x)=e^2x and g(x)=log sqroot (x>0) , then fog(x) is equal to
Answer» if f(x)=e^2x and g(x)=log sqroot (x>0) , then fog(x) is equal to

Discussion

45.	2. A certain quantity of gas occupied 100ml when collected over water at 15degree C and 750mm pressure. It occupies 91.9ml in dry state at NTP. Find the vapour pressure of water at 15degree C
Answer» 2. A certain quantity of gas occupied 100ml when collected over water at 15degree C and 750mm pressure. It occupies 91.9ml in dry state at NTP. Find the vapour pressure of water at 15degree C

Discussion

46.	what dimension
Answer» what dimension

Discussion

47.	Describe an activity to show that thermoplastic is a poor conductor of electricity.
Answer» Describe an activity to show that thermoplastic is a poor conductor of electricity.

Discussion

48.	A compound forms hexagonal close packed structure. what is the total no of voids in 0.5 mol of it? how many of these are tetraherdal voids?
Answer» A compound forms hexagonal close packed structure. what is the total no of voids in 0.5 mol of it? how many of these are tetraherdal voids?

Discussion

49.	QUESTION 2.5 A solution of glucose in water is labelled as 10% w/w. What should be the molality and mole fraction of each component in the solution? If the density of solution is 1.2 g mL−1, then what shall be the molarity of the solution?
Answer» QUESTION 2.5 A solution of glucose in water is labelled as $10 % w / w$ . What should be the molality and mole fraction of each component in the solution? If the density of solution is $1.2 g m L^{- 1}$ , then what shall be the molarity of the solution?

49.

QUESTION 2.5 A solution of glucose in water is labelled as 10% w/w. What should be the molality and mole fraction of each component in the solution? If the density of solution is 1.2 g mL−1, then what shall be the molarity of the solution?

Answer»

QUESTION 2.5

A solution of glucose in water is labelled as $10 % w / w$ . What should be the molality and mole fraction of each component in the solution? If the density of solution is $1.2 g m L^{- 1}$ , then what shall be the molarity of the solution?

Discussion

50.	Write the IUPAC name of the following compound:CH3−O−CH3\|C\|CH3−CH3
Answer» Write the IUPAC name of the following compound: $C H_{3} - O - C H_{3} \| C \| C H_{3} - C H_{3}$

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

if rhombohedral and trigonal are same then why they are taken 2 different types unit cells in bravias lattice ?

0.96 gm of NaOH and KOH mixture reacts with 50 ml of 0.1 M h2so4 .find out the mass percentage of NaOH on mixtur

Minimum distance between two tetrahedral voids if a is the edge length of the cube isOptions:(1) a/2(2) a/4(3) a/2√2(4) √3a/4

One mole of an ideal gas undergoes a process P = P0 (1 + (2V0V)2]−1,where P0, V0 are constants. Change in temperature of the gas when volume is changed from V=V0to V=2V0 is nPoV0R. Then n is

what is peniciline?

36. A inert gas obeys the law Pyx for what 36.Qvalue of x, It has negative molar specific heat(I) x 1.67(2) x < 1.67sed 37

Why in ethylene all four atomic orbitals does not show hybridisation ? Why there is sp2 hybridisation ?

The reaction products of C6H5OCH3+HIΔ→ is :

Give two characteristics of a mixture? Explain with an example of each.

200 mL of an aqueous solution of a protein contains its 1.26 g. The osmotic pressure of this solution at 300 K is found to be 2.52×10−3 bar. The molar mass of protein will be(R=0.08 L bar mol−1 K−1)

Cot 7 .5

What is a dimeric anion ?

When A ∝ B, the graph is a straight line passing through

How to find the number of atoms?

i mol of \lbrack Ag\rbrack Ag+ sol is coagulated by 1)100 ml 1M k2SO4 2)Fe3+ 3)1 mol of Na+ 4)none of these

Which of the following hydrocarbon can undergo addition reaction? CH4 , C2H6, C2H4 , C3H6

Why ice cold condition is necessary for preparation of benzene diazonium chloride

Which one of the following compounds will be most readily dehydrated?

For which of the following reactions is △ H≠△ E and why?\:(A) H_2+I_2\overset{}{→2HI (B) HCl(aq)+NaOH(aq)}\overset{}{→ NaCl(aq)+H_2O (C)C(s)+O2=CO2 (d)N2+3H2=2NH

What is meant by aqueous solution

The conductance of 0.01N Ch3cooh solution is 4.5/10000 ohm which is present in a tube having length 6 cm and cross section area 36cm20.the molar Conductivity of the solution is

11. Q1-Mole fraction of solvent in aqueous solution of NaOH have molality of 3 is

48. Number of g of in 32.2g na2so4.10h2o is

Explain the statement - "Charge is QUANTIZED".

Which of the following is not an electrophile?

Which of the following statement(s) is/are correct when a mixture of NaCl and K2Cr2O7 are gently warmed with conc. H2SO4 ?

In the given reaction 3I_2 +OH^-→ IO_3^- 5I^- 2 moles of iodine are taken then the ratio of iodate and iodide ions formed in the alkaline medium i

1 mg of Thorium in each minute emits 22 alpha-particles per unit solid angle. Find half-life of Thorium?

Where r octahedral voids r present in unit cell?

How C2 has only pie bonds according to not.

what happens when sodium metal is placed in moist air?

A compound contains 6.4% by mass of oxygen. It contains two moles of oxygen atoms per mole of the compound. What is the molar mass of the compound?

At 400 K, the rate constant of a chemical reaction is 3×10−4s−1 and at 300 K, the rate constant is 6×10−5s−1. Find the value of Ea i.e. activation energy required for the reaction. Take:log10(0.2)=0.7

What is lechalteirs law in chemical equilibria

On what basis we decide bravias lattice 14 different types of unit cells?or we just need to learn?

A p-type semiconductor has acceptor levels 57 meV above the valence band. The maximum wavelength of light required to create a hole is (Planck's constant h= 6.6×10−34J−s)

Nucleophilic addition across the carbonyl will be the best for:

For the given reaction : Which of the following can be the reactant (R)?

Which halogen shows an oxidation state of -1 only?

if f(x)=e^2x and g(x)=log sqroot (x>0) , then fog(x) is equal to

2. A certain quantity of gas occupied 100ml when collected over water at 15degree C and 750mm pressure. It occupies 91.9ml in dry state at NTP. Find the vapour pressure of water at 15degree C

what dimension

Describe an activity to show that thermoplastic is a poor conductor of electricity.​

A compound forms hexagonal close packed structure. what is the total no of voids in 0.5 mol of it? how many of these are tetraherdal voids?

QUESTION 2.5 A solution of glucose in water is labelled as 10% w/w. What should be the molality and mole fraction of each component in the solution? If the density of solution is 1.2 g mL−1, then what shall be the molarity of the solution?

Write the IUPAC name of the following compound:CH3−O−CH3|C|CH3−CH3

Describe an activity to show that thermoplastic is a poor conductor of electricity.