46295 + Interview Questions in Chemistry

1.	Identify the product .
Answer» Identify the product .

Discussion

2.	1,2-Dibromoethane on treatment with X moles of NaNH2 followed by treatment with C2H5Br gives a butyne. The value of X is:
Answer» 1,2-Dibromoethane on treatment with X moles of $N a N H_{2}$ followed by treatment with $C_{2} H_{5} B r$ gives a butyne. The value of X is:

Discussion

3.	Which of the following low osmotic pressure at same temp 100ml of 1M urea 400ml 0.5 M kal 200ml of 0.5M glucose
Answer» Which of the following low osmotic pressure at same temp 100ml of 1M urea 400ml 0.5 M kal 200ml of 0.5M glucose

Discussion

4.	The IUPAC name of the following compound is?CH3−CH3−CH(CH2−CH3)−CH2−CH(CH3)−CH3
Answer» The IUPAC name of the following compound is? $C H_{3} - C H_{3} - C H (C H_{2} - C H_{3}) - C H_{2} - C H (C H_{3}) - C H_{3}$

4.

The IUPAC name of the following compound is?CH3−CH3−CH(CH2−CH3)−CH2−CH(CH3)−CH3

Answer»

The IUPAC name of the following compound is?

$C H_{3} - C H_{3} - C H (C H_{2} - C H_{3}) - C H_{2} - C H (C H_{3}) - C H_{3}$

Discussion

5.	The strength of a 10−2 M Na2CO3 solution in terms of its molality will be: (density of solution=1.10 g mL−1,molecular weight of Na2CO3=106 g mol−1)
Answer» The strength of a $10^{- 2} M N a_{2} C O_{3}$ solution in terms of its molality will be: $(density of solution = 1.10 {g mL}^{- 1}$ , $molecular weight of N a_{2} C O_{3} = 106 {g mol}^{- 1})$

Discussion

6.	Aqueous solutions of 0.004 M sodium sulphate and 0.01 M glucose are isotonic. The degree of dissociation of sodium sulphate is -
Answer» Aqueous solutions of 0.004 M sodium sulphate and 0.01 M glucose are isotonic. The degree of dissociation of sodium sulphate is -

Discussion

7.	A sample of hydrogen gas is heated in such a way that all the atoms reach a particular excited state A. Photons of energy 2.55 eV get absorbed into the sample to take some of the electrons to a further excited state B. What are the quantum numbers of states A and B?
Answer» A sample of hydrogen gas is heated in such a way that all the atoms reach a particular excited state A. Photons of energy 2.55 eV get absorbed into the sample to take some of the electrons to a further excited state B. What are the quantum numbers of states A and B?

Discussion

8.	Given the sequence of reactions,NH2NO2(aq) + OH(aq)- → NH4NO2(aq)- + H2O(l)NH4NO2(aq)- → N2O(g) + OH(aq)-The catalyst for the overall reaction is,(a) OH(aq)-(b) NH2NO2 (aq)(c) NH4NO2- (aq)(d) N2O(g)
Answer» Given the sequence of reactions, ${NH}_{2} {NO}_{2 (aq)} + {OH}_{(aq)}^{-} \underset{}{\to} {NH}_{4} {NO}_{2 (aq)}^{-} + H_{2} O_{(l)} {NH}_{4} {NO}_{2 (aq)}^{-} \underset{}{\to} N_{2} O_{(g)} + {OH}_{(aq)}^{-}$ The catalyst for the overall reaction is, (a) ${OH}_{(aq)}^{-}$ (b) NH₂NO₂_(aq) (c) ${NH}_{4} {NO}_{2}^{-}_{(aq)}$ (d) N₂O_(g)

Discussion

9.	From the given images find out the compound which finds its applications in all of these ?
Answer» From the given images find out the compound which finds its applications in all of these ?

Discussion

10.	Calculate the pH of 10−10 M HCl solution.
Answer» Calculate the $p H$ of $10^{- 10} M H C l$ solution.

Discussion

11.	NAME OFHC triple bond C-CH=CH-CH3
Answer» NAME OF HC triple bond C-CH=CH-CH3

Discussion

12.	what is the oxidation number of chlorine in bleaching powder?
Answer» what is the oxidation number of chlorine in bleaching powder?

Discussion

13.	A lead storage battery containing 5.0L of H2SO4 solution is operated for 9.65×105s with a steady current of 100 mA. Assuming volume of the solution remains constant, normality of H2SO4 will :
Answer» A lead storage battery containing 5.0L of $H_{2} S O_{4}$ solution is operated for $9.65 \times 10^{5} s$ with a steady current of 100 mA. Assuming volume of the solution remains constant, normality of $H_{2} S O_{4}$ will :

Discussion

14.	How to find products of a chemical reaction from the reactants?
Answer» How to find products of a chemical reaction from the reactants?

Discussion

15.	Exhausted permutit is
Answer» Exhausted permutit is

Discussion

16.	how to identify nucleophillicity order
Answer» how to identify nucleophillicity order

Discussion

17.	Arrange in increasing order of heat of hydrogenation of following dienes.
Answer» Arrange in increasing order of heat of hydrogenation of following dienes.

Discussion

18.	17. What is the overall dissociation constant of [M(NH3)4]+ ion if beta for this complex is 2.1 * 10
Answer» 17. What is the overall dissociation constant of [M(NH3)4]+ ion if beta for this complex is 2.1 * 10

Discussion

19.	In ABCABC close packing what are the types of voids present?
Answer» In ABCABC close packing what are the types of voids present?

Discussion

20.	The two forms of D-glucopyranose obtained from the solution of D-glucose are called
Answer» The two forms of D-glucopyranose obtained from the solution of D-glucose are called

Discussion

21.	Prove of H.C.F(a,b,c)=abc* L.C.M(a,b,c)/L.C.M(a,b)L.C.M(b,c)L.C.M(c,a)andL.C.M(a,b,c)=abcH.C.F(a,b,c)/H.C.F(a,b)H.C.F(b,c)*H.C.F(c,a)
Answer» Prove of H.C.F(a,b,c)=abc* L.C.M(a,b,c)/L.C.M(a,b)L.C.M(b,c)L.C.M(c,a) and L.C.M(a,b,c)=abcH.C.F(a,b,c)/H.C.F(a,b)H.C.F(b,c)*H.C.F(c,a)

Discussion

22.	A compound of molecular formula C8H8O2 reacts with acetophenone to form a single cross-aldol product in the presence of base. The same compound on reaction with conc. NaOH forms benzyl alcohol as one of the products. The structure of the compound is :
Answer» A compound of molecular formula $C_{8} H_{8} O_{2}$ reacts with acetophenone to form a single cross-aldol product in the presence of base. The same compound on reaction with conc. NaOH forms benzyl alcohol as one of the products. The structure of the compound is :

Discussion

23.	When o-xylene is reacted with O3 followed by Zn/H2O, total number of different types of product(s) obtained is/are:
Answer» When o-xylene is reacted with $O_{3}$ followed by $Z n / H_{2} O$ , total number of different types of product(s) obtained is/are:

Discussion

24.	What is the difference between molecular mass and empirical mass? Explain with the help of hydrogen peroxide molecule.
Answer» What is the difference between molecular mass and empirical mass? Explain with the help of hydrogen peroxide molecule.

Discussion

25.	A compound forms hexagonal close-packed structure. What is the total number of voids in 0.5 mol of it? How many of these are tetrahedral voids?
Answer» A compound forms hexagonal close-packed structure. What is the total number of voids in 0.5 mol of it? How many of these are tetrahedral voids?

Discussion

26.	If you are given Avogadro's number of atoms of a gas 'X'. If half of the atoms are converted into X+(g) by energy ΔH. The IE of X is
Answer» If you are given Avogadro's number of atoms of a gas 'X'. If half of the atoms are converted into $X_{(g)}^{+}$ by energy $Δ H$ . The IE of X is

Discussion

27.	Which of the following compounds contains no lonic bond?:-(1) NaBr, (2) NaClO_4, (3) CuSO_4. 5H_2O, (4) POCI_3.
Answer» Which of the following compounds contains no lonic bond?:-(1) NaBr, (2) NaClO_4, (3) CuSO_4. 5H_2O, (4) POCI_3.

Discussion

28.	2A+B→CFor the above reaction at 298 K, ΔH=400 kJ mol−1 and ΔS=0.2 kJ K−1mol−1. At what temperature, will the reaction become spontaneous considering the ΔH and ΔS to be constant over the temperature range?
Answer» $2 A + B \to C$ For the above reaction at $298 K$ , $Δ H = 400 {kJ mol}^{- 1}$ and $Δ S = 0.2 {kJ K}^{- 1} {mol}^{- 1}$ . At what temperature, will the reaction become spontaneous considering the $Δ H$ and $Δ S$ to be constant over the temperature range?

Discussion

29.	The unit cell in a body centred cubic lattice is given in the figure. Each sphere has a radius 'r' and the cube has side 'a'. What fraction of the total cube volume is empty?
Answer» The unit cell in a body centred cubic lattice is given in the figure. Each sphere has a radius 'r' and the cube has side 'a'. What fraction of the total cube volume is empty?

Discussion

30.	What will be the hybridisation of oxygen in aldehydes, ketones and nitrocompounds?
Answer» What will be the hybridisation of oxygen in aldehydes, ketones and nitrocompounds?

Discussion

31.	An acidic buffer solution can be prepared by mixing the solutions of
Answer» An acidic buffer solution can be prepared by mixing the solutions of

Discussion

32.	Calculate the ratio of change in the mass of the molecules of a gas to the initial mass, if itsspeed is reduced to half and the ratio of initial and final pressure is 3:4.
Answer» Calculate the ratio of change in the mass of the molecules of a gas to the initial mass, if itsspeed is reduced to half and the ratio of initial and final pressure is 3:4.

Discussion

33.	If 300 ml of a gas at 27∘C is cooled to 7∘C at costant pressure, then its final volume will be
Answer» If 300 ml of a gas at $27^{\circ} C$ is cooled to $7^{\circ} C$ at costant pressure, then its final volume will be

Discussion

34.	A boat carrying a number of stones is floating in a water tank. If the stones are unloaded into water, the water level in the tank will
Answer» A boat carrying a number of stones is floating in a water tank. If the stones are unloaded into water, the water level in the tank will

Discussion

35.	how can the resistance be equal to 1/r^2 when the volume is kept constant
Answer» how can the resistance be equal to 1/r^2 when the volume is kept constant

Discussion

36.	20 In NaCl there are how many Schottky pairs per cm3 at R.T
Answer» 20 In NaCl there are how many Schottky pairs per cm3 at R.T

Discussion

37.	Molarity of pure D2O will be (assume density of D2O is 1 g mL−1)
Answer» Molarity of pure $D_{2} O$ will be (assume density of $D_{2} O$ is $1 g m L^{- 1}$ )

Discussion

38.	1.50.0kg of N2(g) and 10.0kg of H2 (g)are mixed to produced NH3(g) formed identify the limiting reagent in the production of NH3 in the situation
Answer» 1.50.0kg of N2(g) and 10.0kg of H2 (g)are mixed to produced NH3(g) formed identify the limiting reagent in the production of NH3 in the situation

Discussion

39.	the resul†an t molarity of solution made by mixing 600ml of 2M NaOH solution and 400ml of 3M NaOH solution i
Answer» the resul†an t molarity of solution made by mixing 600ml of 2M NaOH solution and 400ml of 3M NaOH solution i

Discussion

40.	The development length required for Fe250 reinforcing bars of 20 mm diameter, as per IS 456:2000 Code for M20 grade concrete and having bars in compression with design bond stress τbd=1.2 MPa, is nearly equal to ____ mm. (Nearest integer value)725
Answer» The development length required for Fe250 reinforcing bars of 20 mm diameter, as per IS 456:2000 Code for M20 grade concrete and having bars in compression with design bond stress $τ_{b d} = 1.2 M P a$ , is nearly equal to ____ mm. (Nearest integer value) 725

Discussion

41.	Hapticity of cycloheptatrienein Mo(C7H8)(CO)3is
Answer» Hapticity of cycloheptatrienein Mo(C7H8)(CO)3is

Discussion

42.	What is sacrifical hyperconjugation??
Answer» What is sacrifical hyperconjugation??

Discussion

43.	A gaseous hydrocarbon X was burnt in excess of O2. A 0.112 dm3 sample of X at STP gave 0.88g of CO2.Then no of C atoms in one molecule of X are
Answer» A gaseous hydrocarbon X was burnt in excess of O2. A 0.112 dm3 sample of X at STP gave 0.88g of CO2.Then no of C atoms in one molecule of X are

Discussion

44.	moles of Fe3+ oxidised by one mole of dichromate in acidic medium is
Answer» moles of Fe3+ oxidised by one mole of dichromate in acidic medium is

Discussion

45.	if each orbital can hold a maximum of 3 electrons. The number of elements in 2nd period of periodic table will b
Answer» if each orbital can hold a maximum of 3 electrons. The number of elements in 2nd period of periodic table will b

Discussion

46.	Which of the following does not decolorize iodine? (1) Na2SO3 (2). Na2S2O3 (3). NaCl (4). NaOH
Answer» Which of the following does not decolorize iodine? (1) Na2SO3 (2). Na2S2O3 (3). NaCl (4). NaOH

Discussion

47.	A gasesous mixture contains three gases N2, O2 and CO2 with a total number of moles of 10 and total pressure of 10 atm. The partial pressure of N2 is 3 atm . The pressure is reduced to 9 atm if the gases is passed through alkaline pyrogallol. If CO2 has molecular weight of 44 g/mol. Then, the weight of CO2 (in grams) present in the mixture will be:
Answer» A gasesous mixture contains three gases $N_{2}$ , $O_{2}$ and $C O_{2}$ with a total number of moles of $10$ and total pressure of $10 atm$ . The partial pressure of $N_{2}$ is $3 atm$ . The pressure is reduced to $9 a t m$ if the gases is passed through alkaline pyrogallol. If $C O_{2}$ has molecular weight of $44 g/mol$ . Then, the weight of $C O_{2}$ (in grams) present in the mixture will be:

Discussion

48.	How can we identify that it is a oxidation potetial or reduction potential (given in the question )? ??
Answer» How can we identify that it is a oxidation potetial or reduction potential (given in the question )? ??

Discussion

49.	K1 and K2 are equilibrium constants for reactions (i) and (ii) respectively.N2(g)+O2(g)⇌2NO(g) ...(i)NO(g)⇌12N2(g)+12O2(g) ...(ii)
Answer» $K_{1} and K_{2}$ are equilibrium constants for reactions (i) and (ii) respectively. $N_{2 (g)} + O_{2 (g)} ⇌ 2 N O_{(g)}$ ...(i) $N O_{(g)} ⇌ \frac{1}{2} N_{2 (g)} + \frac{1}{2} O_{2 (g)}$ ...(ii)

Discussion

50.	When we are representing an ion, do we need to write it like [Cl] and "-" sign in the superscript?
Answer» When we are representing an ion, do we need to write it like [Cl] and "-" sign in the superscript?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Identify the product .

1,2-Dibromoethane on treatment with X moles of NaNH2 followed by treatment with C2H5Br gives a butyne. The value of X is:

Which of the following low osmotic pressure at same temp 100ml of 1M urea 400ml 0.5 M kal 200ml of 0.5M glucose

The IUPAC name of the following compound is?CH3−CH3−CH(CH2−CH3)−CH2−CH(CH3)−CH3

The strength of a 10−2 M Na2CO3 solution in terms of its molality will be: (density of solution=1.10 g mL−1,molecular weight of Na2CO3=106 g mol−1)

Aqueous solutions of 0.004 M sodium sulphate and 0.01 M glucose are isotonic. The degree of dissociation of sodium sulphate is -

A sample of hydrogen gas is heated in such a way that all the atoms reach a particular excited state A. Photons of energy 2.55 eV get absorbed into the sample to take some of the electrons to a further excited state B. What are the quantum numbers of states A and B?

Given the sequence of reactions,NH2NO2(aq) + OH(aq)- → NH4NO2(aq)- + H2O(l)NH4NO2(aq)- → N2O(g) + OH(aq)-The catalyst for the overall reaction is,(a) OH(aq)-(b) NH2NO2 (aq)(c) NH4NO2- (aq)(d) N2O(g)

From the given images find out the compound which finds its applications in all of these ?

Calculate the pH of 10−10 M HCl solution.

NAME OFHC triple bond C-CH=CH-CH3

what is the oxidation number of chlorine in bleaching powder?

A lead storage battery containing 5.0L of H2SO4 solution is operated for 9.65×105s with a steady current of 100 mA. Assuming volume of the solution remains constant, normality of H2SO4 will :

How to find products of a chemical reaction from the reactants?

Exhausted permutit is

how to identify nucleophillicity order

Arrange in increasing order of heat of hydrogenation of following dienes.

17. What is the overall dissociation constant of [M(NH3)4]+ ion if beta for this complex is 2.1 * 10

In ABCABC close packing what are the types of voids present?

The two forms of D-glucopyranose obtained from the solution of D-glucose are called

Prove of H.C.F(a,b,c)=a*b*c* L.C.M(a,b,c)/L.C.M(a,b)*L.C.M(b,c)*L.C.M(c,a)andL.C.M(a,b,c)=a*b*c*H.C.F(a,b,c)/H.C.F(a,b)*H.C.F(b,c)*H.C.F(c,a)

A compound of molecular formula C8H8O2 reacts with acetophenone to form a single cross-aldol product in the presence of base. The same compound on reaction with conc. NaOH forms benzyl alcohol as one of the products. The structure of the compound is :

When o-xylene is reacted with O3 followed by Zn/H2O, total number of different types of product(s) obtained is/are:

What is the difference between molecular mass and empirical mass? Explain with the help of hydrogen peroxide molecule.

A compound forms hexagonal close-packed structure. What is the total number of voids in 0.5 mol of it? How many of these are tetrahedral voids?

If you are given Avogadro's number of atoms of a gas 'X'. If half of the atoms are converted into X+(g) by energy ΔH. The IE of X is

Which of the following compounds contains no lonic bond?:-(1) NaBr, (2) NaClO_4, (3) CuSO_4. 5H_2O, (4) POCI_3.

2A+B→CFor the above reaction at 298 K, ΔH=400 kJ mol−1 and ΔS=0.2 kJ K−1mol−1. At what temperature, will the reaction become spontaneous considering the ΔH and ΔS to be constant over the temperature range?

The unit cell in a body centred cubic lattice is given in the figure. Each sphere has a radius 'r' and the cube has side 'a'. What fraction of the total cube volume is empty?

What will be the hybridisation of oxygen in aldehydes, ketones and nitrocompounds?

An acidic buffer solution can be prepared by mixing the solutions of

Calculate the ratio of change in the mass of the molecules of a gas to the initial mass, if itsspeed is reduced to half and the ratio of initial and final pressure is 3:4.

If 300 ml of a gas at 27∘C is cooled to 7∘C at costant pressure, then its final volume will be

A boat carrying a number of stones is floating in a water tank. If the stones are unloaded into water, the water level in the tank will

how can the resistance be equal to 1/r^2 when the volume is kept constant

20 In NaCl there are how many Schottky pairs per cm3 at R.T

Molarity of pure D2O will be (assume density of D2O is 1 g mL−1)

1.50.0kg of N2(g) and 10.0kg of H2 (g)are mixed to produced NH3(g) formed identify the limiting reagent in the production of NH3 in the situation

the resul†an t molarity of solution made by mixing 600ml of 2M NaOH solution and 400ml of 3M NaOH solution i

The development length required for Fe250 reinforcing bars of 20 mm diameter, as per IS 456:2000 Code for M20 grade concrete and having bars in compression with design bond stress τbd=1.2 MPa, is nearly equal to ____ mm. (Nearest integer value)725

Hapticity of cycloheptatrienein Mo(C7H8)(CO)3is

What is sacrifical hyperconjugation??

A gaseous hydrocarbon X was burnt in excess of O2. A 0.112 dm3 sample of X at STP gave 0.88g of CO2.Then no of C atoms in one molecule of X are

moles of Fe3+ oxidised by one mole of dichromate in acidic medium is

if each orbital can hold a maximum of 3 electrons. The number of elements in 2nd period of periodic table will b

Which of the following does not decolorize iodine? (1) Na2SO3 (2). Na2S2O3 (3). NaCl (4). NaOH

How can we identify that it is a oxidation potetial or reduction potential (given in the question )? ??

K1 and K2 are equilibrium constants for reactions (i) and (ii) respectively.N2(g)+O2(g)⇌2NO(g) ...(i)NO(g)⇌12N2(g)+12O2(g) ...(ii)

When we are representing an ion, do we need to write it like [Cl] and "-" sign in the superscript?

Prove of H.C.F(a,b,c)=abc* L.C.M(a,b,c)/L.C.M(a,b)L.C.M(b,c)L.C.M(c,a)andL.C.M(a,b,c)=abc*H.C.F(a,b,c)/H.C.F(a,b)H.C.F(b,c)H.C.F(c,a)