46295 + Interview Questions in Chemistry

1.	Values of n,l,m and s for electron 4s1 orbital will be
Answer» Values of n,l,m and s for electron 4s1 orbital will be

Discussion

2.	Are plasma and Bose-Einstein condensate states of matter?
Answer» Are plasma and Bose-Einstein condensate states of matter?

Discussion

3.	Why real gases which are the actually existing gases obey gas equation only under 2 conditions Low pressureHigh temperature
Answer» Why real gases which are the actually existing gases obey gas equation only under 2 conditions Low pressure High temperature

Discussion

4.	100ml of liquid A and 25ml of liquid B is mixed to give a solution which does not obey Raoults law . The volume of the solution (1) will be 125 ml (2) can be ≥ or ≤ than 125 ml (3) can be ≥ , = or ≤ than 125 ml (4) will be less than 125 ml
Answer» 100ml of liquid A and 25ml of liquid B is mixed to give a solution which does not obey Raoults law . The volume of the solution (1) will be 125 ml (2) can be ≥ or ≤ than 125 ml (3) can be ≥ , = or ≤ than 125 ml (4) will be less than 125 ml

Discussion

5.	Ionisation of energy of F− is 320 kJ mol−1. The electron gain enthalpy of fluorine would be
Answer» Ionisation of energy of $F^{-}$ is $320 {kJ mol}^{- 1}$ . The electron gain enthalpy of fluorine would be

Discussion

6.	Equation for Boyle's Law is
Answer» Equation for Boyle's Law is

Discussion

7.

Ion concentrations obtained for a groundwater sample (having pH=8.10) are given below. IonCa2+Mg2+Na+HCO−3SO2−4Cl−Ion concentration (mg/L)1006152504539Atomic weightCa=40Mg=24Na=23H=1C=12O=16S=32O=16Cl=35.5Total hardness (mg/LasCaCO3) present in the above water sample is

Answer»

Ion concentrations obtained for a groundwater sample (having $p H = 8.10$ ) are given below.

Ion	$C a^{2 +}$	$M g^{2 +}$	$N a^{+}$	$H C O_{3}^{-}$	$S O_{4}^{2 -}$	$C l^{-}$
Ion concentration $(m g / L)$	$100$	$6$	$15$	$250$	$45$	$39$
Atomic weight	$C a = 40$	$M g = 24$	$N a = 23$	$H = 1$ $C = 12$ $O = 16$	$S = 32$ $O = 16$	$C l = 35.5$

Total hardness

(m g / L a s C a C O_{3})

present in the above water sample is

Discussion

8.	Find the noumber of electron of oxygen atom in 0.3 gm Mohar Salt molecule
Answer» Find the noumber of electron of oxygen atom in 0.3 gm Mohar Salt molecule

Discussion

9.	A list of species having the formula XZ4 is given below XeF4, SF4, SiF4, BF−4, BrF−4, [Cu(NH3)4], [FeCl4]2−, [CoCl4]2− and [PtCl4]2−.Defining shape on the basis of the location of X and Z atoms, the total number of species having a square planar shape is:
Answer» A list of species having the formula $X Z_{4}$ is given below $X e F_{4}$ , $S F_{4}$ , $S i F_{4}$ , $B F_{4}^{-}$ , $B r F_{4}^{-}$ , $[C u (N H_{3})_{4}]$ , $[F e C l_{4}]^{2 -}$ , $[C o C l_{4}]^{2 -}$ and $[P t C l_{4}]^{2 -}$ . Defining shape on the basis of the location of $X$ and $Z$ atoms, the total number of species having a square planar shape is:

Discussion

10.	Which of the following is the weakest acid ? (1) HCl (2) HI (3) HF (4) HB
Answer» Which of the following is the weakest acid ? (1) HCl (2) HI (3) HF (4) HB

Discussion

11.	Among the given compounds, the most susceptible to nucleophilic attack at the carbonyl group is
Answer» Among the given compounds, the most susceptible to nucleophilic attack at the carbonyl group is

Discussion

12.	How many electrons in argon atom have m_l=1?(a)1, (b) 6, (c) 4,(d)2
Answer» How many electrons in argon atom have m_l=1?(a)1, (b) 6, (c) 4,(d)2

Discussion

13.	Which of the following molecule has the maximum ionic character?
Answer» Which of the following molecule has the maximum ionic character?

Discussion

14.	In Thomson experiment of finding e/m for electrons, beam of electron is replaced by that of muons (particle with same charge as of electrons but mass 208 times that of electrons). No deflection condition in this case is satisfied if
Answer» In Thomson experiment of finding e/m for electrons, beam of electron is replaced by that of muons (particle with same charge as of electrons but mass 208 times that of electrons). No deflection condition in this case is satisfied if

Discussion

15.	Are combination reactions always exothermic ?
Answer» Are combination reactions always exothermic ?

Discussion

16.	What if we add acid and acid or base with a base
Answer» What if we add acid and acid or base with a base

Discussion

17.	what is the work of reagent DIBAL-H and on which type of compounds does it works
Answer» what is the work of reagent DIBAL-H and on which type of compounds does it works

Discussion

18.	Is monomers of gyptal and Dacron same ? If yes, then how are they different?
Answer» Is monomers of gyptal and Dacron same ? If yes, then how are they different?

Discussion

19.	3. Which of the following are incorrect? a. P4O10 reacts with CaO to form calcium phosphate b. 2LiNO3(s) -------> Li2O (s) + 2NO2 (g) + 1/2 O2 (g) c. The number of geometrical isomers for the complex [ CoCl2(gly)2] - is 5
Answer» 3. Which of the following are incorrect? a. P4O10 reacts with CaO to form calcium phosphate b. 2LiNO3(s) -------> Li2O (s) + 2NO2 (g) + 1/2 O2 (g) c. The number of geometrical isomers for the complex [ CoCl2(gly)2] - is 5

Discussion

20.	What is n-factor?
Answer» What is n-factor?

Discussion

21.	Why does gallium have very low melting point but very high boiling point?
Answer» Why does gallium have very low melting point but very high boiling point?

Discussion

22.	The equilibrium constant for the reaction, N2(g)+3H2(g)⇌2NH3(g) is k, then the equilibrium constant for the equilibrium 2NH3(g)⇌N2(g)+3H2(g) is:
Answer» The equilibrium constant for the reaction, $N_{2} (g) + 3 H_{2} (g) ⇌ 2 N H_{3} (g)$ is $k$ , then the equilibrium constant for the equilibrium $2 N H_{3} (g) ⇌ N_{2} (g) + 3 H_{2} (g)$ is:

Discussion

23.	Na2CO3 can be manufactured by Solvay’s process but K2CO3 cannot be prepared because
Answer» $N a_{2} C O_{3}$ can be manufactured by Solvay’s process but $K_{2} C O_{3}$ cannot be prepared because

Discussion

24.	Two lines A and B of an X-ray give second order reflection maximum at a glancing angle of 60∘ and third order reflection maximum at an angle of 30∘ respectively from the face of the same crystal. If the wavelength of line B is 0.25 nm, then the wavelength of line A will be -
Answer» Two lines $A$ and $B$ of an X-ray give second order reflection maximum at a glancing angle of $60^{\circ}$ and third order reflection maximum at an angle of $30^{\circ}$ respectively from the face of the same crystal. If the wavelength of line $B$ is $0.25 nm$ , then the wavelength of line $A$ will be -

Discussion

25.	(a) Balance the following chemical equation:PbNO32s→heatPbOs+NO2g+O2g(b) State two characteristic features of carbon which when put together give rise to a large number of carbon compounds.(c) Describe an activity to show that acids produce ions only in aqueous solutions.
Answer» (a) Balance the following chemical equation: $Pb {({NO}_{3})}_{2} (s) \overset{heat}{\to} PbO (s) + {NO}_{2} (g) + O_{2} (g)$ (b) State two characteristic features of carbon which when put together give rise to a large number of carbon compounds. (c) Describe an activity to show that acids produce ions only in aqueous solutions.

Discussion

26.	What electronic transition in the He+ ion would emit the radiation of the same wavelength as that of the first Lyman transition of hydrogen atom ?
Answer» What electronic transition in the $H e^{+}$ ion would emit the radiation of the same wavelength as that of the first Lyman transition of hydrogen atom ?

Discussion

27.	Which of the following oxy acid of sulphur has +6 oxidation state for sulphur?
Answer» Which of the following oxy acid of sulphur has +6 oxidation state for sulphur?

Discussion

28.	Which of the following hydrocarbons cannot be obtained by Sabatier and Senderen's reaction
Answer» Which of the following hydrocarbons cannot be obtained by Sabatier and Senderen's reaction

Discussion

29.	Draw the top view of the following structure.
Answer» Draw the top view of the following structure.

Discussion

30.	Is reference point and the frame of reference the same?
Answer» Is reference point and the frame of reference the same?

Discussion

31.	In the future you synthesize a new element. A neutral atom of the element, say 'X', has 4 electrons and 2 neutrons. How will you represent the nucleus of the element in your award winning paper?
Answer» In the future you synthesize a new element. A neutral atom of the element, say 'X', has 4 electrons and 2 neutrons. How will you represent the nucleus of the element in your award winning paper?

Discussion

32.	Write chemicalreactions taking place in the extraction of zinc from zinc blende.
Answer» Write chemical reactions taking place in the extraction of zinc from zinc blende.

Discussion

33.	Is colloidal particle visible to naked eye
Answer» Is colloidal particle visible to naked eye

Discussion

34.	A compound ‘X’ on ozonolysis forms two molecules of HCHO. Compound ‘X’ is
Answer» A compound ‘X’ on ozonolysis forms two molecules of HCHO. Compound ‘X’ is

Discussion

35.	stability of lyophilic sols are due to whether charge or layer of dispersion medium?
Answer» stability of lyophilic sols are due to whether charge or layer of dispersion medium?

Discussion

36.	Impurity defect is the defect in which
Answer» Impurity defect is the defect in which

Discussion

37.	What are centrosomes ?Show diagram?
Answer» What are centrosomes ?Show diagram?

Discussion

38.	Give one method for industrial preparation and one for laboratory preparation of CO and CO2 each.
Answer» Give one method for industrial preparation and one for laboratory preparation of CO and $C O_{2}$ each.

Discussion

39.	The molal depression constant for water is 1.86∘C. The freezing point of a 0.05-molal solution of a non-electrolyte in water is
Answer» The molal depression constant for water is ${1.86}^{\circ} C$ . The freezing point of a 0.05-molal solution of a non-electrolyte in water is

Discussion

40.	Which of the following should be correct according to Hund's Rule?
Answer» Which of the following should be correct according to Hund's Rule?

Discussion

41.	Which of the following will produce a buffer solution when mixed in equal volumes?
Answer» Which of the following will produce a buffer solution when mixed in equal volumes?

Discussion

42.	The oxide of nitrogen formed in atmosphere during lightning is :
Answer» The oxide of nitrogen formed in atmosphere during lightning is :

Discussion

43.	A dihalogen derivative (X) with three carbon atoms reacts with alcoholic KOH to givehydrocarbon (Y) which gives a white precipitate with ammonical AgNO3. With aqueous KOH gives a ketone. The compound (X) is
Answer» A dihalogen derivative (X) with three carbon atoms reacts with alcoholic KOH to givehydrocarbon (Y) which gives a white precipitate with ammonical $A g N O_{3}$ . With aqueous KOH gives a ketone. The compound (X) is

Discussion

44.	can a compound have both cation and anion? In CuSo_4 which is cation and which is anio
Answer» can a compound have both cation and anion? In CuSo_4 which is cation and which is anio

Discussion

45.	(Ksp) AgCl is 2.8×10−10 at 25∘ C. Calculate solubility of AgCl in 0.1(M)AgNO3
Answer» $(K_{s p})$ AgCl is $2.8 \times 10^{- 10}$ at $25^{\circ}$ C. Calculate solubility of AgCl in $0.1 (M) A g N O_{3}$

Discussion

46.	If α = 25% for NaCl then the van't Hoff factor will be
Answer» If α = 25% for NaCl then the van't Hoff factor will be

Discussion

47.	which of the following is used for inducing sleep
Answer» which of the following is used for inducing sleep

Discussion

48.	Which of the following molecule follows octet rule? Options: a) ClO_2 b) NO c) NO_2 d) N_2O_3
Answer» Which of the following molecule follows octet rule? Options: a) ClO_2 b) NO c) NO_2 d) N_2O_3

Discussion

49.	29. Which does not give aldol condensation reaction? 1) CH3CH2CHO 2) (CH3)3CCH2CH2CHO 3) CH3CH2CH(CH3)CHO 4) (CH3)2CHCHO
Answer» 29. Which does not give aldol condensation reaction? 1) CH3CH2CHO 2) (CH3)3CCH2CH2CHO 3) CH3CH2CH(CH3)CHO 4) (CH3)2CHCHO

Discussion

50.	Arrange the following glycols in order of decreasing rate of oxidation with periodic acid.
Answer» Arrange the following glycols in order of decreasing rate of oxidation with periodic acid.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Values of n,l,m and s for electron 4s1 orbital will be

Are plasma and Bose-Einstein condensate states of matter?

Why real gases which are the actually existing gases obey gas equation only under 2 conditions Low pressureHigh temperature

100ml of liquid A and 25ml of liquid B is mixed to give a solution which does not obey Raoults law . The volume of the solution (1) will be 125 ml (2) can be ≥ or ≤ than 125 ml (3) can be ≥ , = or ≤ than 125 ml (4) will be less than 125 ml

Ionisation of energy of F− is 320 kJ mol−1. The electron gain enthalpy of fluorine would be

Equation for Boyle's Law is

Ion concentrations obtained for a groundwater sample (having pH=8.10) are given below. IonCa2+Mg2+Na+HCO−3SO2−4Cl−Ion concentration (mg/L)1006152504539Atomic weightCa=40Mg=24Na=23H=1C=12O=16S=32O=16Cl=35.5Total hardness (mg/LasCaCO3) present in the above water sample is

Find the noumber of electron of oxygen atom in 0.3 gm Mohar Salt molecule

A list of species having the formula XZ4 is given below XeF4, SF4, SiF4, BF−4, BrF−4, [Cu(NH3)4], [FeCl4]2−, [CoCl4]2− and [PtCl4]2−.Defining shape on the basis of the location of X and Z atoms, the total number of species having a square planar shape is:

Which of the following is the weakest acid ? (1) HCl (2) HI (3) HF (4) HB

Among the given compounds, the most susceptible to nucleophilic attack at the carbonyl group is

How many electrons in argon atom have m_l=1?(a)1, (b) 6, (c) 4,(d)2

Which of the following molecule has the maximum ionic character?

In Thomson experiment of finding e/m for electrons, beam of electron is replaced by that of muons (particle with same charge as of electrons but mass 208 times that of electrons). No deflection condition in this case is satisfied if

Are combination reactions always exothermic ?

What if we add acid and acid or base with a base

what is the work of reagent DIBAL-H and on which type of compounds does it works

Is monomers of gyptal and Dacron same ? If yes, then how are they different?

3. Which of the following are incorrect? a. P4O10 reacts with CaO to form calcium phosphate b. 2LiNO3(s) -------> Li2O (s) + 2NO2 (g) + 1/2 O2 (g) c. The number of geometrical isomers for the complex [ CoCl2(gly)2] - is 5

What is n-factor?

Why does gallium have very low melting point but very high boiling point?

The equilibrium constant for the reaction, N2(g)+3H2(g)⇌2NH3(g) is k, then the equilibrium constant for the equilibrium 2NH3(g)⇌N2(g)+3H2(g) is:

Na2CO3 can be manufactured by Solvay’s process but K2CO3 cannot be prepared because

Two lines A and B of an X-ray give second order reflection maximum at a glancing angle of 60∘ and third order reflection maximum at an angle of 30∘ respectively from the face of the same crystal. If the wavelength of line B is 0.25 nm, then the wavelength of line A will be -

(a) Balance the following chemical equation:PbNO32s→heatPbOs+NO2g+O2g(b) State two characteristic features of carbon which when put together give rise to a large number of carbon compounds.​(c) Describe an activity to show that acids produce ions only in aqueous solutions.

What electronic transition in the He+ ion would emit the radiation of the same wavelength as that of the first Lyman transition of hydrogen atom ?

Which of the following oxy acid of sulphur has +6 oxidation state for sulphur?

Which of the following hydrocarbons cannot be obtained by Sabatier and Senderen's reaction

Draw the top view of the following structure.

Is reference point and the frame of reference the same?

In the future you synthesize a new element. A neutral atom of the element, say 'X', has 4 electrons and 2 neutrons. How will you represent the nucleus of the element in your award winning paper?

Write chemicalreactions taking place in the extraction of zinc from zinc blende.

Is colloidal particle visible to naked eye

A compound ‘X’ on ozonolysis forms two molecules of HCHO. Compound ‘X’ is

stability of lyophilic sols are due to whether charge or layer of dispersion medium?

Impurity defect is the defect in which

What are centrosomes ?Show diagram?

Give one method for industrial preparation and one for laboratory preparation of CO and CO2 each.

The molal depression constant for water is 1.86∘C. The freezing point of a 0.05-molal solution of a non-electrolyte in water is

Which of the following should be correct according to Hund's Rule?

Which of the following will produce a buffer solution when mixed in equal volumes?

The oxide of nitrogen formed in atmosphere during lightning is :

A dihalogen derivative (X) with three carbon atoms reacts with alcoholic KOH to givehydrocarbon (Y) which gives a white precipitate with ammonical AgNO3. With aqueous KOH gives a ketone. The compound (X) is

can a compound have both cation and anion? In CuSo_4 which is cation and which is anio

(Ksp) AgCl is 2.8×10−10 at 25∘ C. Calculate solubility of AgCl in 0.1(M)AgNO3

If α = 25% for NaCl then the van't Hoff factor will be

which of the following is used for inducing sleep

Which of the following molecule follows octet rule? Options: a) ClO_2 b) NO c) NO_2 d) N_2O_3

29. Which does not give aldol condensation reaction? 1) CH3CH2CHO 2) (CH3)3CCH2CH2CHO 3) CH3CH2CH(CH3)CHO 4) (CH3)2CHCHO

Arrange the following glycols in order of decreasing rate of oxidation with periodic acid.

(a) Balance the following chemical equation:PbNO32s→heatPbOs+NO2g+O2g(b) State two characteristic features of carbon which when put together give rise to a large number of carbon compounds.(c) Describe an activity to show that acids produce ions only in aqueous solutions.