46295 + Interview Questions in Chemistry

1.	The compound B formed in the following sequences of reactions is CH3−CH2−CH2−Cl(a)propylchloride)Alc.KOH−−−−−−→ CH3−CH=CH2(Propeneb)
Answer» The compound B formed in the following sequences of reactions is $C H_{3} - C H_{2} - C H_{2} - C l (a) p r o p y l c h l o r i d e) A l c . K O H - ----- \to C H_{3} - C H = C H_{2} (P r o p e n e b)$

Discussion

2.	Which of the following sawhorse representation is correct for the given newman projection?
Answer» Which of the following sawhorse representation is correct for the given newman projection?

Discussion

3.	Deuterium reacts with oxygen to form ___.
Answer» Deuterium reacts with oxygen to form ___.

Discussion

4.	What is 'A' in the following reaction 2Fe3+aq+Sn2+aq⟶2Fe2+aq+A
Answer» What is 'A' in the following reaction $2 F e_{a q}^{3 +} + S n_{a q}^{2 +} ⟶ 2 F e_{a q}^{2 +} + A$

Discussion

5.	The rate of a first order reaction R→Pis 7.5×10−4molL−1s−1 when the concentration of R is 0.5 mol L−1. The rate constant is
Answer» The rate of a first order reaction $R \to P$ is $7.5 \times 10^{- 4} m o l L^{- 1} s^{- 1}$ when the concentration of R is 0.5 mol $L^{- 1}$ . The rate constant is

Discussion

6.	Compound that will not give idoform on treatment with alkali and iodine is :
Answer» Compound that will not give idoform on treatment with alkali and iodine is :

Discussion

7.	Major source of Nitrogen for most of the plants is
Answer» Major source of Nitrogen for most of the plants is

Discussion

8.	What happens when ethylamine is made to react with excess formic acid and formaldehyde?
Answer» What happens when ethylamine is made to react with excess formic acid and formaldehyde?

Discussion

9.	Consider the molecules CH4, NH3 and H2O. Which of the given statements is false?
Answer» Consider the molecules $C H_{4}$ , $N H_{3}$ and $H_{2} O$ . Which of the given statements is false?

Discussion

10.	What is a steroid?
Answer» What is a steroid?

Discussion

11.	Electrode potential values depends on
Answer» Electrode potential values depends on

Discussion

12.	The product of the reaction given below
Answer» The product of the reaction given below

12.

The product of the reaction given below

Answer»

The product of the reaction given below

Discussion

13.	The IUPAC name of the following componds is
Answer» The IUPAC name of the following componds is

13.

The IUPAC name of the following componds is

Answer»

The IUPAC name of the following componds is

Discussion

14.	Consider the following reactions, The compound [P] is :
Answer» Consider the following reactions, The compound [P] is :

Discussion

15.	Hydrocarbon (A) reacts with bromine by substitution to form an alkyl bromide which by Wurtz reaction is converted to a gaseous hydrocarbon containing less than four carbon atoms. (A) is:
Answer» Hydrocarbon (A) reacts with bromine by substitution to form an alkyl bromide which by Wurtz reaction is converted to a gaseous hydrocarbon containing less than four carbon atoms. (A) is:

Discussion

16.	Which among the following would be the most reactive?
Answer» Which among the following would be the most reactive?

Discussion

17.	In a given atom no two electrons can have the same values for all the four quantum numbers. This is called
Answer» In a given atom no two electrons can have the same values for all the four quantum numbers. This is called

Discussion

18.	The correct increasing order of trans-effect of the following species is :
Answer» The correct increasing order of trans-effect of the following species is :

Discussion

19.	The temperature to which a gas must be cooled before it can be liquefied by compression is called as___.
Answer» The temperature to which a gas must be cooled before it can be liquefied by compression is called as___.

Discussion

20.	An ionic compound AB has ZnS type of structure, if the radius A+ is 22.5pm, then the ideal radius of B- is
Answer» An ionic compound AB has ZnS type of structure, if the radius A+ is 22.5pm, then the ideal radius of B- is

Discussion

21.	When the following aldohexose exists in its D-configuration, the total number of streoisomers in its pyranose form is: CHO−CH2−CHOH−CHOH−CHOH−CH2OH
Answer» When the following aldohexose exists in its D-configuration, the total number of streoisomers in its pyranose form is: $C H O - C H_{2} - C H O H - C H O H - C H O H - C H_{2} O H$

Discussion

22.	Sulphuric acid reacts with sodium hydroxide as follows H2SO4+2NaOH→Na2SO4+2H2O When 1L of 0.1M sulphuric acid solutoin is allowed to react with 1L of 0.1M sodium hydroxide solutoin, the amount of sodium sulphate formed and its molarity in the solution obtained is ? (a) 0.1 mol L−1 (b) 7.10 g (c) 0.025 mol L−1 (d) 3.55 g
Answer» Sulphuric acid reacts with sodium hydroxide as follows $H_{2} S O_{4} + 2 N a O H \to N a_{2} S O_{4} + 2 H_{2} O$ When 1L of 0.1M sulphuric acid solutoin is allowed to react with 1L of 0.1M sodium hydroxide solutoin, the amount of sodium sulphate formed and its molarity in the solution obtained is ? (a) $0.1 m o l L^{- 1}$ (b) $7.10 g$ (c) $0.025 m o l L^{- 1}$ (d) $3.55 g$

22.

Sulphuric acid reacts with sodium hydroxide as follows H2SO4+2NaOH→Na2SO4+2H2O When 1L of 0.1M sulphuric acid solutoin is allowed to react with 1L of 0.1M sodium hydroxide solutoin, the amount of sodium sulphate formed and its molarity in the solution obtained is ? (a) 0.1 mol L−1 (b) 7.10 g (c) 0.025 mol L−1 (d) 3.55 g

Answer»

Sulphuric acid reacts with sodium hydroxide as follows

$H_{2} S O_{4} + 2 N a O H \to N a_{2} S O_{4} + 2 H_{2} O$

When 1L of 0.1M sulphuric acid solutoin is allowed to react with 1L of 0.1M sodium hydroxide solutoin, the amount of sodium sulphate formed and its molarity in the solution obtained is ?

(a) $0.1 m o l L^{- 1}$ (b) $7.10 g$

(c) $0.025 m o l L^{- 1}$ (d) $3.55 g$

Discussion

23.	the correct increasing order of acidity of CO2, H2O and H2O2 is:
Answer» the correct increasing order of acidity of $C O_{2}, H_{2} O$ and $H_{2} O_{2}$ is:

Discussion

24.	Magnetic moment of Cr+2(Z=24),Mn+2 (Z=25) and Fe2+(Z=26) are x,y,z They are in order :
Answer» Magnetic moment of $C r^{+ 2} (Z = 24), M n^{+ 2}$ (Z=25) and $F e^{2 +} (Z = 26)$ are $x, y, z$ They are in order :

Discussion

25.	The binding energies of the atom of elements A and B are Ea and Eb respectively. Three atoms of the element B fuse to give one atom of element A. This fusion process is accompanied by release of energy e. Then Ea,Eb are related to each other as
Answer» The binding energies of the atom of elements A and B are $E_{a}$ and $E_{b}$ respectively. Three atoms of the element B fuse to give one atom of element A. This fusion process is accompanied by release of energy $e$ . Then $E_{a}, E_{b}$ are related to each other as

Discussion

26.	RNA polymerase – I transcribes eukaryotic ribosome which does not consist of
Answer» RNA polymerase – I transcribes eukaryotic ribosome which does not consist of

Discussion

27.	Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under an electric field?
Answer» Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under an electric field?

Discussion

28.	The number of electron pairs in OSF4 is
Answer» The number of electron pairs in $O S F_{4}$ is

Discussion

29.	If a body gives out 109 electrons every second how much time is required to get total charge of 1 C
Answer» If a body gives out $10^{9}$ electrons every second how much time is required to get total charge of 1 C

Discussion

30.	What will be the n-factor (nf) for H3PO2 and H3BO3 respectively?
Answer» What will be the n-factor $(n_{f})$ for $H_{3} P O_{2}$ and $H_{3} B O_{3}$ respectively?

Discussion

31.	The d - electron configurations of Mn2+, Fe2+, Co3+, and Ni2+ are 3d5, 3d6, 3d6, 3d8, respectively. Which of the following aqua complexes will exhibit the minimum paramagnetic behavior?
Answer» The d - electron configurations of $M n^{2 +}, F e^{2 +}, C o^{3 +}, a n d N i^{2 +} a r e 3 d^{5}, 3 d^{6}, 3 d^{6}, 3 d^{8},$ respectively. Which of the following aqua complexes will exhibit the minimum paramagnetic behavior?

Discussion

32.	MnO4+i__>mno2+i2 half cell method
Answer» MnO4+i__>mno2+i2 half cell method

Discussion

33.	An analysis of Pyrex glass showed the presence of 12.9% of B2O3, 2.2% of Al2O3, 3.8% of Na2O, 0.4% of K2O and the remaining was SiO2. What is the ratio of silicon to boron atoms in the glass?
Answer» An analysis of Pyrex glass showed the presence of 12.9% of $B_{2} O_{3}$ , 2.2% of $A l_{2} O_{3}$ , 3.8% of $N a_{2} O$ , 0.4% of $K_{2} O$ and the remaining was $S i O_{2}$ . What is the ratio of silicon to boron atoms in the glass?

Discussion

34.	Difference between Schottky and Frenkel defects
Answer» Difference between Schottky and Frenkel defects

Discussion

35.	Water is colourless but when it is boiled the steam produced is whiter in colour?
Answer» Water is colourless but when it is boiled the steam produced is whiter in colour?

Discussion

36.	Short description of principle of kjeldahls method.
Answer» Short description of principle of kjeldahls method.

Discussion

37.	If in a Galvanic cell ,say Daniell cell an inert platinum is used instead of a salt bridge why won't the cell still produce a potential
Answer» If in a Galvanic cell ,say Daniell cell an inert platinum is used instead of a salt bridge why won't the cell still produce a potential

Discussion

38.	There are two samples of HCL having molarity 1 M and 0.25 M. Find the volumes of these samples taken in order to prepare 0.75M HCl solution. A)20 ml and 10 ml B)100 ml and 50 ml C) 40ml and 20 ml D) 50ml and 25ml
Answer» There are two samples of HCL having molarity 1 M and 0.25 M. Find the volumes of these samples taken in order to prepare 0.75M HCl solution. A)20 ml and 10 ml B)100 ml and 50 ml C) 40ml and 20 ml D) 50ml and 25ml

Discussion

39.	How many forms Black phosphorus has?
Answer» How many forms Black phosphorus has?

Discussion

40.	Difference between space lattice and crystal lattice
Answer» Difference between space lattice and crystal lattice

Discussion

41.	Toluene on heating with succinic anhydride in the presence of anhydrous followed by reduction with Zn - Hg/Con. HCl gives a product which on heating with thionyl chloride followed by heating with anhydrous AlCl3 in CS2 gives major product (A), so, the product (A) is:
Answer» Toluene on heating with succinic anhydride in the presence of anhydrous followed by reduction with Zn - Hg/Con. HCl gives a product which on heating with thionyl chloride followed by heating with anhydrous $A l C l_{3}$ in $C S_{2}$ gives major product (A), so, the product (A) is:

Discussion

42.	Which of the following is a possible electronic configuration?
Answer» Which of the following is a possible electronic configuration?

Discussion

43.	The solubility in water of sulphates down the Be group decreases. This is due to-
Answer» The solubility in water of sulphates down the Be group decreases. This is due to-

Discussion

44.	The number of hydrogen bonds in a small stretch of DNA with 20 Adenines and 30 guanines
Answer» The number of hydrogen bonds in a small stretch of DNA with 20 Adenines and 30 guanines

Discussion

45.	An aqueous solution of borax is (a) neutral (b) amphoteric (c) basic (d) acidic
Answer» An aqueous solution of borax is (a) neutral (b) amphoteric (c) basic (d) acidic

Discussion

46.	At equilibrium in a container of 10ml 60% of the reactant gets dissociated into product in a container of 10ml. Calculate its equilibrium constant. H2O + CO ---> H2 + CO2
Answer» At equilibrium in a container of 10ml 60% of the reactant gets dissociated into product in a container of 10ml. Calculate its equilibrium constant. H₂O + CO ---> H₂+ CO₂

Discussion

47.	Is hydrogen anion or cation? Why it is called as nonmetal even if it is placed at s- block???
Answer» Is hydrogen anion or cation? Why it is called as nonmetal even if it is placed at s- block???

Discussion

48.	In a solid AB having NaCl structure, A atoms forms cubic unit cell type structure. If all the face centred atoms along one of the axes are removed, then the resultant stoichiometry of the solid is:
Answer» In a solid AB having NaCl structure, A atoms forms cubic unit cell type structure. If all the face centred atoms along one of the axes are removed, then the resultant stoichiometry of the solid is:

Discussion

49.	A radioactive element decays by beta emission. A detector records n beta particle in the first 2 seconds and 0.75 n beta particles in the next 2 seconds. The decay constant of the element is
Answer» A radioactive element decays by beta emission. A detector records n beta particle in the first 2 seconds and 0.75 n beta particles in the next 2 seconds. The decay constant of the element is

Discussion

50.	A sample of chloroform before being used as an anaesthetic agent is tested by
Answer» A sample of chloroform before being used as an anaesthetic agent is tested by

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The compound B formed in the following sequences of reactions is CH3−CH2−CH2−Cl(a)propylchloride)Alc.KOH−−−−−−→ CH3−CH=CH2(Propeneb)

Which of the following sawhorse representation is correct for the given newman projection?

Deuterium reacts with oxygen to form ___.

What is 'A' in the following reaction 2Fe3+aq+Sn2+aq⟶2Fe2+aq+A

The rate of a first order reaction R→Pis 7.5×10−4molL−1s−1 when the concentration of R is 0.5 mol L−1. The rate constant is

Compound that will not give idoform on treatment with alkali and iodine is :

Major source of Nitrogen for most of the plants is

What happens when ethylamine is made to react with excess formic acid and formaldehyde?

Consider the molecules CH4, NH3 and H2O. Which of the given statements is false?

What is a steroid?

Electrode potential values depends on

The product of the reaction given below

The IUPAC name of the following componds is

Consider the following reactions, The compound [P] is :

Hydrocarbon (A) reacts with bromine by substitution to form an alkyl bromide which by Wurtz reaction is converted to a gaseous hydrocarbon containing less than four carbon atoms. (A) is:

Which among the following would be the most reactive?

In a given atom no two electrons can have the same values for all the four quantum numbers. This is called

The correct increasing order of trans-effect of the following species is :

The temperature to which a gas must be cooled before it can be liquefied by compression is called as___.

An ionic compound AB has ZnS type of structure, if the radius A+ is 22.5pm, then the ideal radius of B- is

When the following aldohexose exists in its D-configuration, the total number of streoisomers in its pyranose form is: CHO−CH2−CHOH−CHOH−CHOH−CH2OH

the correct increasing order of acidity of CO2, H2O and H2O2 is:

Magnetic moment of Cr+2(Z=24),Mn+2 (Z=25) and Fe2+(Z=26) are x,y,z They are in order :

The binding energies of the atom of elements A and B are Ea and Eb respectively. Three atoms of the element B fuse to give one atom of element A. This fusion process is accompanied by release of energy e. Then Ea,Eb are related to each other as

RNA polymerase – I transcribes eukaryotic ribosome which does not consist of

Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under an electric field?

The number of electron pairs in OSF4 is

If a body gives out 109 electrons every second how much time is required to get total charge of 1 C

What will be the n-factor (nf) for H3PO2 and H3BO3 respectively?

The d - electron configurations of Mn2+, Fe2+, Co3+, and Ni2+ are 3d5, 3d6, 3d6, 3d8, respectively. Which of the following aqua complexes will exhibit the minimum paramagnetic behavior?

MnO4+i__>mno2+i2 half cell method

An analysis of Pyrex glass showed the presence of 12.9% of B2O3, 2.2% of Al2O3, 3.8% of Na2O, 0.4% of K2O and the remaining was SiO2. What is the ratio of silicon to boron atoms in the glass?

Difference between Schottky and Frenkel defects

Water is colourless but when it is boiled the steam produced is whiter in colour?

Short description of principle of kjeldahls method.

If in a Galvanic cell ,say Daniell cell an inert platinum is used instead of a salt bridge why won't the cell still produce a potential

There are two samples of HCL having molarity 1 M and 0.25 M. Find the volumes of these samples taken in order to prepare 0.75M HCl solution. A)20 ml and 10 ml B)100 ml and 50 ml C) 40ml and 20 ml D) 50ml and 25ml

How many forms Black phosphorus has?

Difference between space lattice and crystal lattice

Toluene on heating with succinic anhydride in the presence of anhydrous followed by reduction with Zn - Hg/Con. HCl gives a product which on heating with thionyl chloride followed by heating with anhydrous AlCl3 in CS2 gives major product (A), so, the product (A) is:

Which of the following is a possible electronic configuration?

The solubility in water of sulphates down the Be group decreases. This is due to-

The number of hydrogen bonds in a small stretch of DNA with 20 Adenines and 30 guanines

An aqueous solution of borax is (a) neutral (b) amphoteric (c) basic (d) acidic

At equilibrium in a container of 10ml 60% of the reactant gets dissociated into product in a container of 10ml. Calculate its equilibrium constant. H2O + CO ---> H2 + CO2

Is hydrogen anion or cation? Why it is called as nonmetal even if it is placed at s- block???

In a solid AB having NaCl structure, A atoms forms cubic unit cell type structure. If all the face centred atoms along one of the axes are removed, then the resultant stoichiometry of the solid is:

A radioactive element decays by beta emission. A detector records n beta particle in the first 2 seconds and 0.75 n beta particles in the next 2 seconds. The decay constant of the element is

A sample of chloroform before being used as an anaesthetic agent is tested by