46295 + Interview Questions in Chemistry

1.	2Na2O 400∘C−−−−→ ______ +2Na
Answer» $2 N a_{2} O 400^{\circ} C - --- \to$ ______ $+ 2 N a$

Discussion

2.	All the transition elements are d-block elements but all d-block elements are not transition elements. Justify
Answer» All the transition elements are d-block elements but all d-block elements are not transition elements. Justify

Discussion

3.	When strongly heated, orthoboric acid leaves a residue of:
Answer» When strongly heated, orthoboric acid leaves a residue of:

Discussion

4.	The lowest first ionization energy would be associated with which of the following electronic configurations
Answer» The lowest first ionization energy would be associated with which of the following electronic configurations

Discussion

5.	In the figures given below, a doll is entrapped within a piston and cylinder containing gas. The initial and final conditions are shown as Fig. I and Fig. II respectively. The volume of doll is:
Answer» In the figures given below, a doll is entrapped within a piston and cylinder containing gas. The initial and final conditions are shown as Fig. I and Fig. II respectively. The volume of doll is:

Discussion

6.	If A is given space 2, which of the following must be true?
Answer» If A is given space 2, which of the following must be true?

Discussion

7.	When ethanol is treated with benzene diazoniumchloride it forms:
Answer» When ethanol is treated with benzene diazoniumchloride it forms:

Discussion

8.	What is acid catalysed dehydration means?
Answer» What is acid catalysed dehydration means?

Discussion

9.	Which has more hydration energy? MgSO4 or BaSO4
Answer» Which has more hydration energy? $M g S O_{4}$ or $B a S O_{4}$

Discussion

10.	wnwhat is the difference between a quantum and a photon ?
Answer» wnwhat is the difference between a quantum and a photon ?

Discussion

11.	What is the difference between or what are lactose, maltose, galactose, sucrose, glucose and fructose. . Explain in very briefly and simple way
Answer» What is the difference between or what are lactose, maltose, galactose, sucrose, glucose and fructose. . Explain in very briefly and simple way

Discussion

12.	The radius of an orbit in a Hydrogen - like atom is 4.5 a0, where a0 is the Bohr radius. Its orbital angular momentum is 3h2π, it is given that h is Planck's constant and R is Rydberg constant. The possible wavelength when the atom de-excites from the given state to the ground state is:
Answer» The radius of an orbit in a Hydrogen - like atom is $4.5 a_{0}$ , where $a_{0}$ is the Bohr radius. Its orbital angular momentum is $\frac{3 h}{2 π}$ , it is given that $h$ is Planck's constant and $R$ is Rydberg constant. The possible wavelength when the atom de-excites from the given state to the ground state is:

Discussion

13.	_________________ includes only those compounds and ions that undergo a chemical change in a reaction in an aqueous solution.
Answer» _________________ includes only those compounds and ions that undergo a chemical change in a reaction in an aqueous solution.

Discussion

14.	In a planar tetra-atomic molecule XY3, X is at the centroid of the equilateral triangle formed by the atoms, Y. If the X - Y bond distance is 1A∘, what is the distance between the centres of any two y atoms?
Answer» In a planar tetra-atomic molecule $X Y_{3}$ , X is at the centroid of the equilateral triangle formed by the atoms, Y. If the X - Y bond distance is $1 A^{\circ}$ , what is the distance between the centres of any two y atoms?

Discussion

15.	The following arrangement of flasks is set up. Assuming no temperature change, determine the final pressure inside the system after all stopcocks are opened. The connecting tube has zero volume. V(L)4.0,3.0,5.0p(atm)0.792,1.23,2.51
Answer» The following arrangement of flasks is set up. Assuming no temperature change, determine the final pressure inside the system after all stopcocks are opened. The connecting tube has zero volume. $\begin{matrix} V (L) & 4.0, & 3.0, & 5.0 p (atm) & 0.792, & 1.23, & 2.51 \end{matrix}$

Discussion

16.	write general electronic configuration of representative elements
Answer» write general electronic configuration of representative elements

Discussion

17.	The equilibrium constant forr the reaction, N2(g)+O2(g)⇋2NO(g) at temperature T is 4×10−4. The value of Kc for the reaction NO(g)⇋12N2(g)+12O2(g) at the same temperature is:
Answer» The equilibrium constant forr the reaction, $N_{2} (g) + O_{2} (g) ⇋ 2 N O (g)$ at temperature T is $4 \times 10^{- 4}$ . The value of $K_{c}$ for the reaction $N O (g) ⇋ \frac{1}{2} N_{2} (g) + \frac{1}{2} O_{2} (g)$ at the same temperature is:

Discussion

18.	Explain why the boiling point of bismuth is less than antimony unlike the usual trend in a group.
Answer» Explain why the boiling point of bismuth is less than antimony unlike the usual trend in a group.

Discussion

19.	Which of the following free radicats is pyramidal?
Answer» Which of the following free radicats is pyramidal?

Discussion

20.	Which of the following species have identical bond order?
Answer» Which of the following species have identical bond order?

Discussion

21.	The density of a solution containing 13% by mass of sulphuric acid is 1.09g/ml.calculate the molarity and normality of the solution.
Answer» The density of a solution containing 13% by mass of sulphuric acid is 1.09g/ml.calculate the molarity and normality of the solution.

Discussion

22.	Glycerine has [MP PMT/PET 1988; MP PMT 1989, 91; AIIMS 1997]
Answer» Glycerine has [MP PMT/PET 1988; MP PMT 1989, 91; AIIMS 1997]

Discussion

23.	Match the medicines given in Column I with their uses given in Column II. Column IColumn IIA. Rantidine1. TranquilzerB. Furacine2. AntibioticC. Phenelzine3. AntistamineD. Chloramphenicol 4. Antiseptic 5. Antifertility drug
Answer» Match the medicines given in Column I with their uses given in Column II. $\begin{matrix} Column I & Column II A. Rantidine & 1. Tranquilzer B. Furacine & 2. Antibiotic C. Phenelzine & 3. Antistamine D. Chloramphenicol & 4. Antiseptic 5. Antifertility drug \end{matrix}$

Discussion

24.	The alkene limonene has the following structure, The product that results from the reaction of limonene and 1 molar equivalent chlorine water is:
Answer» The alkene limonene has the following structure, The product that results from the reaction of limonene and 1 molar equivalent chlorine water is:

Discussion

25.	Red coloured complex ion formed on adding FeCl3 to sodium extract, when N and S both are present in the organic compound, is
Answer» Red coloured complex ion formed on adding $F e C l_{3}$ to sodium extract, when N and S both are present in the organic compound, is

Discussion

26.	Amongst LiCl, RbCl, BeCl2, MgCl2, The compounds with greatest and least ionic character respectively are:
Answer» Amongst LiCl, RbCl, BeCl₂, MgCl₂, The compounds with greatest and least ionic character respectively are:

Discussion

27.	BY←2−Butyne+H2X−→A. A and B are geometrical isomers, A is more symmetrical than B. Then X and Y are
Answer» $B Y \leftarrow 2 - B u t y n e + H_{2} X - \to A .$ A and B are geometrical isomers, A is more symmetrical than B. Then X and Y are

Discussion

28.	The given diagram indicates the energy levels of certain atoms. When the system moves from the 2E level to E a photon of wavelength λ is emitted. The wavelength of photon produced during its transition from 4E3 level to E is
Answer» The given diagram indicates the energy levels of certain atoms. When the system moves from the 2E level to E a photon of wavelength $λ$ is emitted. The wavelength of photon produced during its transition from $\frac{4 E}{3}$ level to E is

28.

The given diagram indicates the energy levels of certain atoms. When the system moves from the 2E level to E a photon of wavelength λ is emitted. The wavelength of photon produced during its transition from 4E3 level to E is

Answer»

The given diagram indicates the energy levels of certain atoms. When the system moves from the 2E level to E a photon of wavelength $λ$ is emitted. The wavelength of photon produced during its transition from $\frac{4 E}{3}$ level to E is

Discussion

29.	Which of the following is an isomer of 2,2- dimethyl propane?
Answer» Which of the following is an isomer of 2,2- dimethyl propane?

Discussion

30.	(iii) D is
Answer» (iii) D is

Discussion

31.	In the nucleophilic addition of CN- to carbonyl carbon, the intermediate formed is
Answer» In the nucleophilic addition of CN^- to carbonyl carbon, the intermediate formed is

Discussion

32.	The hybridization of N, C and O shown in the following compound respectively, are: R−N=C=O
Answer» The hybridization of $N, C$ and $O$ shown in the following compound respectively, are: $R - N = C = O$

Discussion

33.	Which statement is/are correct? i) Physical adsorption is due to Van der Waal's forces ii) Physical adsorption decreases at high temperature iii) Physical adsorption is irreversible iv) Enthalpy for a chemical adsorption is generally lesser than that of physical adsorption
Answer» Which statement is/are correct? i) Physical adsorption is due to Van der Waal's forces ii) Physical adsorption decreases at high temperature iii) Physical adsorption is irreversible iv) Enthalpy for a chemical adsorption is generally lesser than that of physical adsorption

33.

Which statement is/are correct? i) Physical adsorption is due to Van der Waal's forces ii) Physical adsorption decreases at high temperature iii) Physical adsorption is irreversible iv) Enthalpy for a chemical adsorption is generally lesser than that of physical adsorption

Answer»

Which statement is/are correct?

i) Physical adsorption is due to Van der Waal's forces

ii) Physical adsorption decreases at high temperature

iii) Physical adsorption is irreversible

iv) Enthalpy for a chemical adsorption is generally lesser than that of physical adsorption

Discussion

34.	Choose the correct option w.r.t haemodialysis:
Answer» Choose the correct option w.r.t haemodialysis:

Discussion

35.	If the number of possible isomers for the compound C2FClBrI is x, then x×2 is:
Answer» If the number of possible isomers for the compound $C_{2} F C l B r I$ is $x$ , then $x \times 2$ is:

Discussion

36.	A 50 ml 1.92% (w/v) solution of a metal ion Mn+ (atomic weight = 120) was treated with 6 g hydrazinehydrate (80% pure) and mixture was saturated with CO2 gas when entire metal gets precipitated as a complex [M(H2N–NHCOO)n]. The complex was filtered off and the filtrate was titrated with 0.3 M KIO3 in the presence of conc. HCl according to the following equation: N2H4+IO−3+2H++2Cl−→ICl+3H2O+N2↑ The volume of M10 KIO3 solution needed for the end point to arrive was 160 ml. Find the value of n.
Answer» A 50 ml 1.92% (w/v) solution of a metal ion $M^{n +}$ (atomic weight = 120) was treated with $6 g$ hydrazinehydrate (80% pure) and mixture was saturated with $C O_{2}$ gas when entire metal gets precipitated as a complex $[M (H_{2} N - N H C O O)_{n}]$ . The complex was filtered off and the filtrate was titrated with $0.3 M K I O_{3}$ in the presence of conc. $H C l$ according to the following equation: $N_{2} H_{4} + I O_{3}^{-} + 2 H^{+} + 2 C l^{-} \to I C l + 3 H_{2} O + N_{2} ↑$ The volume of $\frac{M}{10} K I O_{3}$ solution needed for the end point to arrive was $160 ml$ . Find the value of $n$ .

Discussion

37.	A solution contains 58.5 g of common salt in 360 g of water. Calculate the total number of protons in the solution.
Answer» A solution contains $58.5 g$ of common salt in $360 g$ of water. Calculate the total number of protons in the solution.

Discussion

38.	Which is the right structure of XeF4 ?
Answer» Which is the right structure of $X e F_{4}$ ?

Discussion

39.	Define isomerism and the different types of isomerism.
Answer» Define isomerism and the different types of isomerism.

Discussion

40.	The major product obtained in the following sequence of reaction is:
Answer» The major product obtained in the following sequence of reaction is:

Discussion

41.	The only correct combination for the Rosenmund’s reaction
Answer» The only correct combination for the Rosenmund’s reaction

Discussion

42.	Which one is not an essential amino acid?
Answer» Which one is not an essential amino acid?

Discussion

43.	How do we find the molar mass of Co(NO 3) 2 . 6 H2O ?
Answer» How do we find the molar mass of Co(NO 3) 2 . 6 H2O ?

Discussion

44.	A perfect crystal of silicon (fig) is doped with some elements as given in the options. Which of these options shows n-type semiconductors ?
Answer» A perfect crystal of silicon (fig) is doped with some elements as given in the options. Which of these options shows n-type semiconductors ?

44.

A perfect crystal of silicon (fig) is doped with some elements as given in the options. Which of these options shows n-type semiconductors ?

Answer»

A perfect crystal of silicon (fig) is doped with some elements as given in the options. Which of these options shows n-type semiconductors ?

Discussion

45.	The orbitals involved in case of sp3d2 hybridisation is
Answer» The orbitals involved in case of $s p^{3} d^{2}$ hybridisation is

Discussion

46.	Volume occupied by 1 gram of oxygen at STP is
Answer» Volume occupied by 1 gram of oxygen at STP is

Discussion

47.	The stability order of the following carbocations is :
Answer» The stability order of the following carbocations is :

Discussion

48.	Can light be observed as particle and wave at the same time in a single experiment ? Is this what the scientists tried to observe during the double slit experiment in quantum physics ?
Answer» Can light be observed as particle and wave at the same time in a single experiment ? Is this what the scientists tried to observe during the double slit experiment in quantum physics ?

Discussion

49.	The product A in the following reaction is : CH3OH−−−−−→[A]
Answer» The product A in the following reaction is : $C H_{3} O H - ---- \to [A]$

Discussion

50.	In which of the following process the bond order is increased and the magnetic behaviour also changed
Answer» In which of the following process the bond order is increased and the magnetic behaviour also changed

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

2Na2O 400∘C−−−−→ ______ +2Na

All the transition elements are d-block elements but all d-block elements are not transition elements. Justify

When strongly heated, orthoboric acid leaves a residue of:

The lowest first ionization energy would be associated with which of the following electronic configurations

In the figures given below, a doll is entrapped within a piston and cylinder containing gas. The initial and final conditions are shown as Fig. I and Fig. II respectively. The volume of doll is:

If A is given space 2, which of the following must be true?

When ethanol is treated with benzene diazoniumchloride it forms:

What is acid catalysed dehydration means?

Which has more hydration energy? MgSO4 or BaSO4

wnwhat is the difference between a quantum and a photon ?

What is the difference between or what are lactose, maltose, galactose, sucrose, glucose and fructose. . Explain in very briefly and simple way

The radius of an orbit in a Hydrogen - like atom is 4.5 a0, where a0 is the Bohr radius. Its orbital angular momentum is 3h2π, it is given that h is Planck's constant and R is Rydberg constant. The possible wavelength when the atom de-excites from the given state to the ground state is:

_________________ includes only those compounds and ions that undergo a chemical change in a reaction in an aqueous solution.

In a planar tetra-atomic molecule XY3, X is at the centroid of the equilateral triangle formed by the atoms, Y. If the X - Y bond distance is 1A∘, what is the distance between the centres of any two y atoms?

The following arrangement of flasks is set up. Assuming no temperature change, determine the final pressure inside the system after all stopcocks are opened. The connecting tube has zero volume. V(L)4.0,3.0,5.0p(atm)0.792,1.23,2.51

write general electronic configuration of representative elements

The equilibrium constant forr the reaction, N2(g)+O2(g)⇋2NO(g) at temperature T is 4×10−4. The value of Kc for the reaction NO(g)⇋12N2(g)+12O2(g) at the same temperature is:

Explain why the boiling point of bismuth is less than antimony unlike the usual trend in a group.

Which of the following free radicats is pyramidal?

Which of the following species have identical bond order?

The density of a solution containing 13% by mass of sulphuric acid is 1.09g/ml.calculate the molarity and normality of the solution.

Glycerine has [MP PMT/PET 1988; MP PMT 1989, 91; AIIMS 1997]

Match the medicines given in Column I with their uses given in Column II. Column IColumn IIA. Rantidine1. TranquilzerB. Furacine2. AntibioticC. Phenelzine3. AntistamineD. Chloramphenicol 4. Antiseptic 5. Antifertility drug

The alkene limonene has the following structure, The product that results from the reaction of limonene and 1 molar equivalent chlorine water is:

Red coloured complex ion formed on adding FeCl3 to sodium extract, when N and S both are present in the organic compound, is

Amongst LiCl, RbCl, BeCl2, MgCl2, The compounds with greatest and least ionic character respectively are:

BY←2−Butyne+H2X−→A. A and B are geometrical isomers, A is more symmetrical than B. Then X and Y are

The given diagram indicates the energy levels of certain atoms. When the system moves from the 2E level to E a photon of wavelength λ is emitted. The wavelength of photon produced during its transition from 4E3 level to E is

Which of the following is an isomer of 2,2- dimethyl propane?

(iii) D is

In the nucleophilic addition of CN- to carbonyl carbon, the intermediate formed is

The hybridization of N, C and O shown in the following compound respectively, are: R−N=C=O

Which statement is/are correct? i) Physical adsorption is due to Van der Waal's forces ii) Physical adsorption decreases at high temperature iii) Physical adsorption is irreversible iv) Enthalpy for a chemical adsorption is generally lesser than that of physical adsorption

Choose the correct option w.r.t haemodialysis:

If the number of possible isomers for the compound C2FClBrI is x, then x×2 is:

A solution contains 58.5 g of common salt in 360 g of water. Calculate the total number of protons in the solution.

Which is the right structure of XeF4 ?

Define isomerism and the different types of isomerism.

The major product obtained in the following sequence of reaction is:

The only correct combination for the Rosenmund’s reaction

Which one is not an essential amino acid?

How do we find the molar mass of Co(NO 3) 2 . 6 H2O ?

A perfect crystal of silicon (fig) is doped with some elements as given in the options. Which of these options shows n-type semiconductors ?

The orbitals involved in case of sp3d2 hybridisation is

Volume occupied by 1 gram of oxygen at STP is

The stability order of the following carbocations is :

Can light be observed as particle and wave at the same time in a single experiment ? Is this what the scientists tried to observe during the double slit experiment in quantum physics ?

The product A in the following reaction is : CH3OH−−−−−→[A]

In which of the following process the bond order is increased and the magnetic behaviour also changed