46295 + Interview Questions in Chemistry

1.	The value of 2^2^3
Answer» The value of 2^2^3

Discussion

2.	The ratio of de Broglie wavelength of the electron in first and third orbits in hydrogen atom is
Answer» The ratio of de Broglie wavelength of the electron in first and third orbits in hydrogen atom is

Discussion

3.	Identify the correct order of solubility in aqueousmedium (1) Na S > Zns > CuS (2) CuS> ZnS Na2S(3) ZnS > Na S> CuS (4) Na S CuS > ZnS
Answer» Identify the correct order of solubility in aqueousmedium (1) Na S > Zns > CuS (2) CuS> ZnS Na2S(3) ZnS > Na S> CuS (4) Na S CuS > ZnS

Discussion

4.	48.How to find hybridisation of compound? Like XeF4,H2O
Answer» 48.How to find hybridisation of compound? Like XeF4,H2O

Discussion

5.	Formation of two isomeric cyanides in the following reaction. CH3CH=CHCH2Cl+KCN(alc.) is due to
Answer» Formation of two isomeric cyanides in the following reaction. $C H_{3} C H = C H C H_{2} C l + K C N (a l c .)$ is due to

Discussion

6.	atomic mass is unitless or not
Answer» atomic mass is unitless or not

Discussion

7.	3.The incorrect statement about the rate constant of a reaction is: 1) it is temperature dependent 2) catalyst can alter the value of rate constant 3) it is independent of steric factor 4) it's unit depends on the order of reaction
Answer» 3.The incorrect statement about the rate constant of a reaction is: 1) it is temperature dependent 2) catalyst can alter the value of rate constant 3) it is independent of steric factor 4) it's unit depends on the order of reaction

Discussion

8.	The shape of the molecules (CH3)3N and (SiH3)3N ar
Answer» The shape of the molecules (CH3)3N and (SiH3)3N ar

Discussion

9.	Mp denotes the mass of a proton and Mn that of a neutron. A given nucleus, of binding energy B, contains Z protons and N neutrons. The mass M(N,Z) of the nucleus is given by(c is the velocity of light)
Answer» $M_{p}$ denotes the mass of a proton and $M_{n}$ that of a neutron. A given nucleus, of binding energy $B$ , contains $Z$ protons and $N$ neutrons. The mass $M (N, Z)$ of the nucleus is given by $(c is the velocity of light)$

Discussion

10.	In which of the following elements +1 oxidation state is more stable than +3 oxidation state
Answer» In which of the following elements +1 oxidation state is more stable than +3 oxidation state

Discussion

11.	What sequence of reaction would best accomplish the following reaction?
Answer» What sequence of reaction would best accomplish the following reaction?

Discussion

12.	The number of angular nodes in 3d _____.
Answer» The number of angular nodes in 3d _____.

Discussion

13.	What is lewis dot structure of C3O2.
Answer» What is lewis dot structure of C₃O_2.

Discussion

14.	The equillibrium constant for a reaction is 10^2 at 300k The standard free energy change for reaction is
Answer» The equillibrium constant for a reaction is 10^2 at 300k The standard free energy change for reaction is

Discussion

15.	12.A mixture of KBr and NaBr weighing 0.560 gm was treated With aqueous Ag+ and all the bromide ion was recovered as 00.97 gm of pure AgBr.The weight of KBr in the sample is: A)0.25 gm B)0.212 gm C)0.36 gm D)0.285 gm
Answer» 12.A mixture of KBr and NaBr weighing 0.560 gm was treated With aqueous Ag+ and all the bromide ion was recovered as 00.97 gm of pure AgBr.The weight of KBr in the sample is: A)0.25 gm B)0.212 gm C)0.36 gm D)0.285 gm

Discussion

16.	Which energy state of triply ionized Beryllium Be3+ has the same orbital radius as that of ground state of hydrogen atom?
Answer» Which energy state of triply ionized Beryllium ${Be}^{3 +}$ has the same orbital radius as that of ground state of hydrogen atom?

Discussion

17.	8. The IUPAC name of the compound CH3CH =CHC triple bond CH is (1) Pent-4-yn-2-ene (2) Pent-3-en-1-yne (3) Pent-2-en-4-yne (4) Pent-1-yn-3-ene
Answer» 8. The IUPAC name of the compound CH3CH =CHC triple bond CH is (1) Pent-4-yn-2-ene (2) Pent-3-en-1-yne (3) Pent-2-en-4-yne (4) Pent-1-yn-3-ene

Discussion

18.	how to measure solid angle?
Answer» how to measure solid angle?

Discussion

19.	pent2yne on ozonolysis followed by hydrolysis will give
Answer» pent2yne on ozonolysis followed by hydrolysis will give

Discussion

20.	Arrange F, Cl, O, N in the decreasing order of electronegativity
Answer» Arrange F, Cl, O, N in the decreasing order of electronegativity

Discussion

21.	A mixture of H2 and O2 gases in a cylinder contains 10 g H2 and 64 g of O2. If the total pressure of the mixture of the gases in the cylinder is 35 bar, the partial pressure of H2 gas is
Answer» A mixture of $H_{2}$ and $O_{2}$ gases in a cylinder contains $10 g H_{2}$ and $64 g$ of $O_{2}$ . If the total pressure of the mixture of the gases in the cylinder is $35 bar$ , the partial pressure of $H_{2}$ gas is

Discussion

22.	H-C≡ C-CH_3 \xrightarrow{HBr(excess)} A \xrightarrow[△]{H_2O}B Compound B is (1) A diol (2) An aldehyde (3) A ketone (4) An alkyl halide
Answer» H-C≡ C-CH_3 \xrightarrow{HBr(excess)} A \xrightarrow[△]{H_2O}B Compound B is (1) A diol (2) An aldehyde (3) A ketone (4) An alkyl halide

Discussion

23.	% hydrolysis of 0.1 M CH3COONH4 when Ka=Kb=1.8×10−5 is -
Answer» $%$ hydrolysis of $0.1 M C H_{3} C O O N H_{4}$ when $K_{a} = K_{b} = 1.8 \times 10^{- 5}$ is -

Discussion

24.	For the reaction, PCl5(g)→PCl3(g)+Cl2(g), the correct option is:
Answer» For the reaction, $P C l_{5} (g) \to P C l_{3} (g) + C l_{2} (g),$ the correct option is:

Discussion

25.	How small size of atom helps to add electron?
Answer» How small size of atom helps to add electron?

Discussion

26.	Thetechnique in which the material is heated in a sloping hearth until one of the metals starts to melt and drain away from the other is known as __
Answer» Thetechnique in which the material is heated in a sloping hearth until one of the metals starts to melt and drain away from the other is known as __

Discussion

27.	Anything that influences the valence electrons will affect the chemistry of the element.which one of the following factors does not the valence shell? (a) valence principal quantum number (n) (b) Nuclear charge (Z) (c) Nuclear mass (d) Number of core electrons.
Answer» Anything that influences the valence electrons will affect the chemistry of the element.which one of the following factors does not the valence shell? (a) valence principal quantum number (n) (b) Nuclear charge (Z) (c) Nuclear mass (d) Number of core electrons.

Discussion

28.	2- bromo butane 15%aq soln of EtOH−−−−−−−−−−−−→P In this reaction 70% recemisation takesplace % of inverted product would be:
Answer» 2- bromo butane $15 % a q s o l n o f E t O H - ----------- \to P$ In this reaction 70% recemisation takesplace % of inverted product would be:

Discussion

29.	How adsorption decreases activation energy ?
Answer» How adsorption decreases activation energy ?

Discussion

30.	Cationic polymerisation is initiated by
Answer» Cationic polymerisation is initiated by

Discussion

31.	Mycorrhiza is correctly described as
Answer» Mycorrhiza is correctly described as

Discussion

32.	Name three compounds of calcium which are used in day-to-day life and write one important use of each of them. [3 MARKS]
Answer» Name three compounds of calcium which are used in day-to-day life and write one important use of each of them. [3 MARKS]

Discussion

33.	When do I know which relation of heat to use with resistance like where to use directly proportional or inversely .
Answer» When do I know which relation of heat to use with resistance like where to use directly proportional or inversely .

Discussion

34.	41. Consider the two first order reactions X → Y and Y → X for which the rate constants k1 and k2 are 4.0 103 s1 and 2.0 103 s1 respectively. One mole of X and three moles of Y are allowed to react and the concentrations of X and Y are measured as a function of time and plotted.
Answer» 41. Consider the two first order reactions X → Y and Y → X for which the rate constants k1 and k2 are 4.0 103 s1 and 2.0 103 s1 respectively. One mole of X and three moles of Y are allowed to react and the concentrations of X and Y are measured as a function of time and plotted.

Discussion

35.	30. The ratio of the &quote/m" ( specific charge) values of a electron and an α -particle is
Answer» 30. The ratio of the "e/m" ( specific charge) values of a electron and an α -particle is

Discussion

36.	How to draw the Lewis structure of thionyl chloride (SOCl2) ?
Answer» How to draw the Lewis structure of thionyl chloride (SOCl2) ?

Discussion

37.	bond angle for CO2,SO3,XeO4
Answer» bond angle for CO2,SO3,XeO4

Discussion

38.	Hydrolysis of nitrides of s-block elements (for eg: Ba3N2,Ca3N2,Li3N) will yield:
Answer» Hydrolysis of nitrides of s-block elements (for eg: $B a_{3} N_{2}, C a_{3} N_{2}, L i_{3} N)$ will yield:

Discussion

39.	The correct order of energies of orbitals is
Answer» The correct order of energies of orbitals is

Discussion

40.	X and Y are two compounds of elements A and Cl. The molar mass and the mass % of Cl are given in the table below.CompoundMolar mass% of ClX20071Y21350X and Y are:
Answer» X and Y are two compounds of elements $A$ and $C l$ . The molar mass and the mass % of $C l$ are given in the table below. $\begin{matrix} Compound & Molar mass & % of Cl X & 200 & 71 Y & 213 & 50 \end{matrix}$ X and Y are:

Discussion

41.	68.The value of van der Waals constant 'a' for gases O2,N2,NH3 and CH4 are x,Y,z and c respectively, where z>c>y>x. The gas which can most easily be liquified is
Answer» 68.The value of van der Waals constant 'a' for gases O2,N2,NH3 and CH4 are x,Y,z and c respectively, where z>c>y>x. The gas which can most easily be liquified is

Discussion

42.	Predict the product "A".
Answer» Predict the product "A".

Discussion

43.	mole concept is not properly explained
Answer» mole concept is not properly explained

Discussion

44.	If N is the number of spheres in the unit cell, then total no. of tetrahedral voids is
Answer» If N is the number of spheres in the unit cell, then total no. of tetrahedral voids is

Discussion

45.	In a kingdom there was an excellent archer. The ruler was jealous of his archery skills, so he decided to put his skills to test. The archer was asked to shoot an apple which was placed on his son's head or else his son will be killed. The archer always used his trusted bow. Case 2: The archer was really confident but the ruler hired a thief to steal his bow and replace it with a defective one which is slightly bent to the side. This time when the archer shot from the new bow he always hit the same spot but slightly deviated from the apple. In this case the archer is:
Answer» In a kingdom there was an excellent archer. The ruler was jealous of his archery skills, so he decided to put his skills to test. The archer was asked to shoot an apple which was placed on his son's head or else his son will be killed. The archer always used his trusted bow. Case 2: The archer was really confident but the ruler hired a thief to steal his bow and replace it with a defective one which is slightly bent to the side. This time when the archer shot from the new bow he always hit the same spot but slightly deviated from the apple. In this case the archer is:

45.

In a kingdom there was an excellent archer. The ruler was jealous of his archery skills, so he decided to put his skills to test. The archer was asked to shoot an apple which was placed on his son's head or else his son will be killed. The archer always used his trusted bow. Case 2: The archer was really confident but the ruler hired a thief to steal his bow and replace it with a defective one which is slightly bent to the side. This time when the archer shot from the new bow he always hit the same spot but slightly deviated from the apple. In this case the archer is:

Answer»

In a kingdom there was an excellent archer. The ruler was jealous of his archery skills, so he decided to put his skills to test. The archer was asked to shoot an apple which was placed on his son's head or else his son will be killed. The archer always used his trusted bow.

Case 2: The archer was really confident but the ruler hired a thief to steal his bow and replace it with a defective one which is slightly bent to the side. This time when the archer shot from the new bow he always hit the same spot but slightly deviated from the apple. In this case the archer is:

Discussion

46.	The current gain of a transistor (common emitter type) is 100, if the base current changes by 10 μA. What is the change in collector current?
Answer» The current gain of a transistor (common emitter type) is $100$ , if the base current changes by $10 μ A$ . What is the change in collector current?

Discussion

47.	A compound used in making nylon,is 43.8 percent oxygen. There are 4 oxygen atoms per molecule. What is the molecular weight of the compound ?
Answer» A compound used in making nylon,is 43.8 percent oxygen. There are 4 oxygen atoms per molecule. What is the molecular weight of the compound ?

Discussion

48.	calculate energy requires to excite electron from ground state to 5th orbit of hydrogen atoms
Answer» calculate energy requires to excite electron from ground state to 5th orbit of hydrogen atoms

Discussion

49.	(CH3)3N(i) BrCN−−−−−−→(ii) H2O,Δ [X], here [X] is
Answer» $(C H_{3})_{3} N (i) B r C N - ----- \to (i i) H_{2} O, Δ [X]$ , here [X] is

Discussion

50.	3.12 g of oxygen is adsorbed on 1.2 g of platinum metal. The value of oxygen adsorbed per gram of the adsorbent at 1 atm and 300 K in L is _______.[R=0.0821 L atm K−1 mol−1]
Answer» $3.12 g$ of oxygen is adsorbed on $1.2 g$ of platinum metal. The value of oxygen adsorbed per gram of the adsorbent at $1 a t m$ and $300 K$ in $L$ is _______. $[R = 0.0821 L a t m K^{- 1} m o l^{- 1}]$

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The value of 2^2^3

The ratio of de Broglie wavelength of the electron in first and third orbits in hydrogen atom is

Identify the correct order of solubility in aqueousmedium (1) Na S > Zns > CuS (2) CuS> ZnS Na2S(3) ZnS > Na S> CuS (4) Na S CuS > ZnS

48.How to find hybridisation of compound? Like XeF4,H2O

Formation of two isomeric cyanides in the following reaction. CH3CH=CHCH2Cl+KCN(alc.) is due to

atomic mass is unitless or not

3.The incorrect statement about the rate constant of a reaction is: 1) it is temperature dependent 2) catalyst can alter the value of rate constant 3) it is independent of steric factor 4) it's unit depends on the order of reaction

The shape of the molecules (CH3)3N and (SiH3)3N ar

Mp denotes the mass of a proton and Mn that of a neutron. A given nucleus, of binding energy B, contains Z protons and N neutrons. The mass M(N,Z) of the nucleus is given by(c is the velocity of light)

In which of the following elements +1 oxidation state is more stable than +3 oxidation state

What sequence of reaction would best accomplish the following reaction?

The number of angular nodes in 3d _____.

What is lewis dot structure of C3O2.

The equillibrium constant for a reaction is 10^2 at 300k The standard free energy change for reaction is

12.A mixture of KBr and NaBr weighing 0.560 gm was treated With aqueous Ag+ and all the bromide ion was recovered as 00.97 gm of pure AgBr.The weight of KBr in the sample is: A)0.25 gm B)0.212 gm C)0.36 gm D)0.285 gm

Which energy state of triply ionized Beryllium Be3+ has the same orbital radius as that of ground state of hydrogen atom?

8. The IUPAC name of the compound CH3CH =CHC triple bond CH is (1) Pent-4-yn-2-ene (2) Pent-3-en-1-yne (3) Pent-2-en-4-yne (4) Pent-1-yn-3-ene

how to measure solid angle?

pent2yne on ozonolysis followed by hydrolysis will give

Arrange F, Cl, O, N in the decreasing order of electronegativity

A mixture of H2 and O2 gases in a cylinder contains 10 g H2 and 64 g of O2. If the total pressure of the mixture of the gases in the cylinder is 35 bar, the partial pressure of H2 gas is

H-C≡ C-CH_3 \xrightarrow{HBr(excess)} A \xrightarrow[△]{H_2O}B Compound B is (1) A diol (2) An aldehyde (3) A ketone (4) An alkyl halide

% hydrolysis of 0.1 M CH3COONH4 when Ka=Kb=1.8×10−5 is -

For the reaction, PCl5(g)→PCl3(g)+Cl2(g), the correct option is:

How small size of atom helps to add electron?

Thetechnique in which the material is heated in a sloping hearth until one of the metals starts to melt and drain away from the other is known as __

Anything that influences the valence electrons will affect the chemistry of the element.which one of the following factors does not the valence shell? (a) valence principal quantum number (n) (b) Nuclear charge (Z) (c) Nuclear mass (d) Number of core electrons.

2- bromo butane 15%aq soln of EtOH−−−−−−−−−−−−→P In this reaction 70% recemisation takesplace % of inverted product would be:

How adsorption decreases activation energy ?

Cationic polymerisation is initiated by

Mycorrhiza is correctly described as

Name three compounds of calcium which are used in day-to-day life and write one important use of each of them. [3 MARKS]

When do I know which relation of heat to use with resistance like where to use directly proportional or inversely .

41. Consider the two first order reactions X → Y and Y → X for which the rate constants k1 and k2 are 4.0 103 s1 and 2.0 103 s1 respectively. One mole of X and three moles of Y are allowed to react and the concentrations of X and Y are measured as a function of time and plotted.

30. The ratio of the &quote/m" ( specific charge) values of a electron and an α -particle is

How to draw the Lewis structure of thionyl chloride (SOCl2) ?

bond angle for CO2,SO3,XeO4

Hydrolysis of nitrides of s-block elements (for eg: Ba3N2,Ca3N2,Li3N) will yield:

The correct order of energies of orbitals is

X and Y are two compounds of elements A and Cl. The molar mass and the mass % of Cl are given in the table below.CompoundMolar mass% of ClX20071Y21350X and Y are:

68.The value of van der Waals constant 'a' for gases O2,N2,NH3 and CH4 are x,Y,z and c respectively, where z>c>y>x. The gas which can most easily be liquified is

Predict the product "A".

mole concept is not properly explained

If N is the number of spheres in the unit cell, then total no. of tetrahedral voids is

The current gain of a transistor (common emitter type) is 100, if the base current changes by 10 μA. What is the change in collector current?

A compound used in making nylon,is 43.8 percent oxygen. There are 4 oxygen atoms per molecule. What is the molecular weight of the compound ?

calculate energy requires to excite electron from ground state to 5th orbit of hydrogen atoms

(CH3)3N(i) BrCN−−−−−−→(ii) H2O,Δ [X], here [X] is

3.12 g of oxygen is adsorbed on 1.2 g of platinum metal. The value of oxygen adsorbed per gram of the adsorbent at 1 atm and 300 K in L is _______.[R=0.0821 L atm K−1 mol−1]