46295 + Interview Questions in Chemistry

1.	If the radius of 2nd Bohr orbit of hydrogen atom is r2, then the radius of the third Bohr orbit will be:
Answer» If the radius of $2^{n d}$ Bohr orbit of hydrogen atom is $r_{2}$ , then the radius of the third Bohr orbit will be:

Discussion

2.	ethyl acetate reacts with excess CH_3MgBr to form: give step by step explanatio
Answer» ethyl acetate reacts with excess CH_3MgBr to form: give step by step explanatio

Discussion

3.	Magnetic susceptibility of paramagnetic substances is around hundred times higher than that of diamagnetic substances.Explain.
Answer» Magnetic susceptibility of paramagnetic substances is around hundred times higher than that of diamagnetic substances.Explain.

Discussion

4.	Two containers P and Q equal volume (1 liter each) contain 6g of O2 and SO2respectively at 300 K and 1atmosphere, thenNumber of molecules in P is less than that in Q Number of molecules in P and Q is same Number of molecules in Q is less than that in P Either (a) or (b).
Answer» Two containers P and Q equal volume (1 liter each) contain 6g of O2 and SO2respectively at 300 K and 1atmosphere, then Number of molecules in P is less than that in Q Number of molecules in P and Q is same Number of molecules in Q is less than that in P Either (a) or (b).

Discussion

5.	how does water vapours have same composition that of water?
Answer» how does water vapours have same composition that of water?

Discussion

6.	The rate constant for the first-order reaction, 2N2O5 → 4NO2 + O2 is 3.0 × 10−5 s−1. If the rate is 2.40 × 10−5 molL s−1, then the initial concentration of N2O5 (in molL) is
Answer» The rate constant for the first-order reaction, 2 $N_{2}$ $O_{5}$ $\to$ 4 ${N O}_{2}$ + $O_{2}$ is 3.0 $\times$ $10^{- 5}$ $s^{- 1}$ . If the rate is 2.40 $\times$ $10^{- 5}$ $\frac{m o l}{L}$ $s^{- 1}$ , then the initial concentration of $N_{2}$ $O_{5}$ (in $\frac{m o l}{L}$ ) is

Discussion

7.	Match List-I with List-II. List-I Chemical CompoundList-II Used as(a)Sucralose(i) Synthetic detergent(b) Glyceryl ester of steric acid(ii)Artificial sweetener(c) Sodium benzoate(iii)Antiseptic (d)Bithionol(iv)Food preservativeChoose the correct match:
Answer» Match List-I with List-II. $\begin{matrix} List-I Chemical Compound & List-II Used as (a)Sucralose & (i) Synthetic detergent (b) Glyceryl ester of steric acid & (ii)Artificial sweetener (c) Sodium benzoate & (iii)Antiseptic (d)Bithionol & (iv)Food preservative \end{matrix}$ Choose the correct match:

Discussion

8.	One mole each of H3PO2, H3PO3 and H3PO4 will neutralize 'x' mol of NaOH,'y' mol of Ca(OH)2 and 'z' mol of Al(OH)3 (assuming all to be strong electrolytes) respectively. x,y and z are in the ratio:
Answer» One mole each of $H_{3} P O_{2}, H_{3} P O_{3}$ and $H_{3} P O_{4}$ will neutralize ' $x$ ' mol of $N a O H,' y' mol of Ca {(O H)}_{2}$ and $' z' mol of Al {(O H)}_{3}$ (assuming all to be strong electrolytes) respectively. $x, y$ and $z$ are in the ratio:

Discussion

9.	Hybridisation of Ni(CO)4 complex
Answer» Hybridisation of Ni(CO)4 complex

Discussion

10.	Give the number of electron in the species H+,H and O+?
Answer» Give the number of electron in the species H+,H and O+?

Discussion

11.	Which will undergo reaction with ammonical AgNO3?
Answer» Which will undergo reaction with ammonical $A g N O_{3}$ ?

Discussion

12.	Do only compunds exist as solids?(Don't elements exist as solids?)Why?
Answer» Do only compunds exist as solids?(Don't elements exist as solids?)Why?

Discussion

13.	Why the Bond dissociation energy of Cl-Cl is greater than F-F. And why the Bond Dissociation energy of H-F is greater than H-H.
Answer» Why the Bond dissociation energy of Cl-Cl is greater than F-F. And why the Bond Dissociation energy of H-F is greater than H-H.

Discussion

14.	Which of the following graph(s) will correspond to a SN1 reaction mechanism?
Answer» Which of the following graph(s) will correspond to a $S_{N} 1$ reaction mechanism?

Discussion

15.	what is max. no. of electrons that can be associated with the following set of quantum numbers n=3 ,l=2
Answer» what is max. no. of electrons that can be associated with the following set of quantum numbers n=3 ,l=2

Discussion

16.	A column of mercury of length of length h=10 cm is contained in the middle of a narrow horizontal tube of length 1m closed at ends.The air in both halves of the tube is under a pressure of p =76 cm of Hg .The tube is now slowly made vertical.The dis†an ce moved by mercury will be
Answer» A column of mercury of length of length h=10 cm is contained in the middle of a narrow horizontal tube of length 1m closed at ends.The air in both halves of the tube is under a pressure of p =76 cm of Hg .The tube is now slowly made vertical.The dis†an ce moved by mercury will be

Discussion

17.	24. number quantum magnetic is What
Answer» 24. number quantum magnetic is What

Discussion

18.	The major monohalo product in the reaction is Identify the product X.
Answer» The major monohalo product in the reaction is Identify the product X.

Discussion

19.	0.01 M solutions of urea, common salt and sodium sulphate are taken The ratio of depression of freezing point will be in the ratio
Answer» 0.01 M solutions of urea, common salt and sodium sulphate are taken The ratio of depression of freezing point will be in the ratio

Discussion

20.	10. A and B gas is present in a container. Pressure of gas A in pure component is 100mm of hg and pressure of gas B in pure component is 200 mm of hg. Mole fraction of A is 0.3 and mole fraction of B is 0.7 then find at what external pressure last liquid drop will evaporate and the composition of that drop is?
Answer» 10. A and B gas is present in a container. Pressure of gas A in pure component is 100mm of hg and pressure of gas B in pure component is 200 mm of hg. Mole fraction of A is 0.3 and mole fraction of B is 0.7 then find at what external pressure last liquid drop will evaporate and the composition of that drop is?

Discussion

21.	17. which one of the following compounds will give thermodynamically as well as kinetically controlled product with HBr ?Options: CH3-CH= CH2 CH3-CH= CH-CH3 CH3-CH2-CH=CH-CH= CH2
Answer» 17. which one of the following compounds will give thermodynamically as well as kinetically controlled product with HBr ?Options: CH3-CH= CH2 CH3-CH= CH-CH3 CH3-CH2-CH=CH-CH= CH2

Discussion

22.	What is the significance of the term half filled atomic orbitals in the valance bond theory
Answer» What is the significance of the term half filled atomic orbitals in the valance bond theory

Discussion

23.	38. 20gms of an organic compound used NH_3 which is completely neutralised by 0.2 mole of H_2SO_4 . Find %of N.
Answer» 38. 20gms of an organic compound used NH_3 which is completely neutralised by 0.2 mole of H_2SO_4 . Find %of N.

Discussion

24.	Ametal has a fcc lattice . The edge length of the unit cell is 404 pm. Thedensity of the metal is 2.72 g cm-3. The molar mass of the metal is:(NAAvogadro's constant =6.02×1023 mol-1)
Answer» A metal has a fcc lattice . The edge length of the unit cell is 404 pm. The density of the metal is 2.72 g cm^-3. The molar mass of the metal is: (N_A Avogadro's constant =6.02×10²³ mol^-1)

24.

Ametal has a fcc lattice . The edge length of the unit cell is 404 pm. Thedensity of the metal is 2.72 g cm-3. The molar mass of the metal is:(NAAvogadro's constant =6.02×1023 mol-1)

Answer»

A
metal has a fcc lattice . The edge length of the unit cell is 404 pm. The
density of the metal is 2.72 g cm^-3. The molar mass of the metal is:

(N_A
Avogadro's constant =6.02×10²³ mol^-1)

Discussion

25.	Cu2++NH3⇌[Cu(NH3)]2+;K1=104[Cu(NH3)]2++NH3⇌[Cu(NH3)2]2+;K2=1.58×103[Cu(NH3)2]2++NH3⇌[Cu(NH3)3]2+;K3=5×102[Cu(NH3)3]2++NH3⇌[Cu(NH3)4]2+;K4=102If the dissociation constant of [Cu(NH3)4]2+is X×10−12. Determine X.
Answer» $C u^{2 +} + N H_{3} ⇌ {[C u (N H_{3})]}_{3}^{2 +}; K_{1} = 10^{4}$ $[C u (N H_{3})]^{2 +} + N H_{3} ⇌ [C u (N H_{3})_{2}]^{2 +}; K_{2} = 1.58 \times 10^{3}$ $[C u (N H_{3})_{2}]^{2 +} + N H_{3} ⇌ [C u (N H_{3})_{3}]^{2 +}; K_{3} = 5 \times 10^{2}$ $[C u (N H_{3})_{3}]^{2 +} + N H_{3} ⇌ [C u (N H_{3})_{4}]^{2 +}; K_{4} = 10^{2}$ If the dissociation constant of $[C u (N H_{3})_{4}]^{2 +} i s X \times 10^{- 12} .$ Determine X.

Discussion

26.	CH3-Ch=Ch-C_=Ch ----Hbr--->a The product a is(1)CH3 -Ch -Br -ch2- c_=ch(2)CH3 CH CH BR ch2
Answer» CH3-Ch=Ch-C_=Ch ----Hbr--->a The product a is (1)CH3 -Ch -Br -ch2- c_=ch (2)CH3 CH CH BR ch2

Discussion

27.	Consider the following list of regents:Cu2+, conc. H2SO4,Cl2,(HNO2+CH3COOH),AgNO3The total number of reagents that can oxidize aqueous iodide to iodine is
Answer» Consider the following list of regents: $C u^{2 +}, c o n c . H_{2} S O_{4}, C l_{2}, (H N O_{2} + C H_{3} C O O H), A g N O_{3}$ The total number of reagents that can oxidize aqueous iodide to iodine is

Discussion

28.	product obtained when cyclohexene is oxidised withacidicpotassium dichromatewil be 1.succinic acid 2.adipicacid 3.benzoic acid 4.terephthalic aci
Answer» product obtained when cyclohexene is oxidised withacidicpotassium dichromatewil be 1.succinic acid 2.adipicacid 3.benzoic acid 4.terephthalic aci

Discussion

29.	22. Which of the following reaction is incorrect ? (1) KBr3 + I2 → KI3 + Br2 (2) KCl3 + F2→ KF3 + Cl2 (3) KBr3 + Cl2 → KCl3 + Br2 (4) Li2O + KCl → K2O + LiCl
Answer» 22. Which of the following reaction is incorrect ? (1) KBr3 + I2 → KI3 + Br2 (2) KCl3 + F2→ KF3 + Cl2 (3) KBr3 + Cl2 → KCl3 + Br2 (4) Li2O + KCl → K2O + LiCl

Discussion

30.	Gaseous metal ion M2+ has 5 unpaired electrons. What is the atomic number?
Answer» Gaseous metal ion M2+ has 5 unpaired electrons. What is the atomic number?

Discussion

31.	The density of liquid mercury is 13.6 g cm−3. How many moles of mercury are there in 1 litre of the metal? (Atomic mass of Hg=200)
Answer» The density of liquid mercury is $13.6 {g cm}^{- 3}$ . How many moles of mercury are there in 1 litre of the metal? (Atomic mass of $H g = 200$ )

Discussion

32.	How did tan alpha came in Edue to short dipole at general point
Answer» How did tan alpha came in Edue to short dipole at general point

Discussion

33.	The molar concentration of Ht ion when 300 ml ofwater is added in 0.1 M 200 ml of H2SO, solution is(1) 0.08 M(3) 0.01 M(2) 0.1 M(4) 0.8 M
Answer» The molar concentration of Ht ion when 300 ml ofwater is added in 0.1 M 200 ml of H2SO, solution is(1) 0.08 M(3) 0.01 M(2) 0.1 M(4) 0.8 M

Discussion

34.	A polar covalent bond will be formed in which one of these pair of atoms:
Answer» A polar covalent bond will be formed in which one of these pair of atoms:

Discussion

35.	If
Answer» If

Discussion

36.	The rate constant for the forward reaction A(g)⇌B(g) is 2×10−3s−1 at 300 K. If 10 moles of A and 1000 mole of B are present in a 100 L container at equilibrium then rate constant for the backward reaction will be:
Answer» The rate constant for the forward reaction $A (g) ⇌ B (g)$ is $2 \times 10^{- 3} s^{- 1}$ at $300 K$ . If $10 moles$ of $A$ and $1000$ mole of $B$ are present in a $100 L$ container at equilibrium then rate constant for the backward reaction will be:

Discussion

37.	An uranium ore sample contains 1g U^238 and 0.2 g Pb^206. Assume that all Pb ^206 is obtained from U^238. The t1/2 of U^238 is 4.5 ×10^9 years. The age of Uranium ore sample is Option(1) 3× 10^9 (2) 1.5× 10^9 (3) 4×10^9 (4)3× 10^8
Answer» An uranium ore sample contains 1g U^238 and 0.2 g Pb^206. Assume that all Pb ^206 is obtained from U^238. The t1/2 of U^238 is 4.5 ×10^9 years. The age of Uranium ore sample is Option (1) 3× 10^9 (2) 1.5× 10^9 (3) 4×10^9 (4)3× 10^8

Discussion

38.	The strongest base among the following is
Answer» The strongest base among the following is

Discussion

39.	What is the chemical name of the compound with chemical formula C5H8?
Answer» What is the chemical name of the compound with chemical formula $C_{5} H_{8}$ ?

Discussion

40.	The velocity of an electron in the orbit of hydrogen atom is 5.47×105 m/s. Total number of waves formed by the electron in one complete revolution is: (give the answer in the nearest integer value)
Answer» The velocity of an electron in the orbit of hydrogen atom is $5.47 \times 10^{5}$ m/s. Total number of waves formed by the electron in one complete revolution is: (give the answer in the nearest integer value)

Discussion

41.	What is the hybridization of NO and triiodine monoanion?
Answer» What is the hybridization of NO and triiodine monoanion?

Discussion

42.	Briefly explain the process of electrolysis of molten Lead Bromide
Answer» Briefly explain the process of electrolysis of molten Lead Bromide

Discussion

43.	Two samples A and B initially at the same temperature and pressure and compressed from volume V to V/2 ( A is isothermally and B adiabatic ally).The final pressure
Answer» Two samples A and B initially at the same temperature and pressure and compressed from volume V to V/2 ( A is isothermally and B adiabatic ally).The final pressure

Discussion

44.	{How many moles of NaOH should be added to 5 moles of CH}}_3{COOH to get a pH of 5.44? Given that pK}}_b(CH3CO0}^-)=9.26. [log 5=0.7] }(}1)4.16 (2)4.74 (3)3.74 (4)5.4
Answer» {How many moles of NaOH should be added to 5 moles of CH}}_3{COOH to get a pH of 5.44? Given that pK}}_b(CH3CO0}^-)=9.26. [log 5=0.7] }(}1)4.16 (2)4.74 (3)3.74 (4)5.4

Discussion

45.	CsBr has similar type structure as of CsCl with edge length of 6 pm. The shortest inter ionic distance in between Cs+ and Br− is:
Answer» $C s B r$ has similar type structure as of $C s C l$ with edge length of $6 pm$ . The shortest inter ionic distance in between $C s^{+}$ and $B r^{-}$ is:

Discussion

46.	Sodium crystallises in body-centred cubic lattice structure has edge length of unit cell 400 pm. The density (in g cm) will be
Answer» Sodium crystallises in body-centred cubic lattice structure has edge length of unit cell 400 pm. The density (in g cm) will be

Discussion

47.	CO2 gas is easily liquefied than O2, because :(1) a' and 'b' of CO2> a' and 'b' of O,(van der Waal's constants)(2) 'a' and 'b' of CO2< a' and 'b' of O2(3) 'a' of CO2>'a' of O2; 'b' of CO2< 'b' of O,(4a of CO2(< a' of O2; ^° b' of CO2 > 'b' of O2
Answer» CO2 gas is easily liquefied than O2, because :(1) a' and 'b' of CO2> a' and 'b' of O,(van der Waal's constants)(2) 'a' and 'b' of CO2< a' and 'b' of O2(3) 'a' of CO2>'a' of O2; 'b' of CO2< 'b' of O,(4a of CO2(< a' of O2; ^° b' of CO2 > 'b' of O2

Discussion

48.	[ Fe(H2O )6]3+ and Fe(CN)6]3- DIFFER IN
Answer» [ Fe(H2O )6]3+ and Fe(CN)6]3- DIFFER IN

Discussion

49.	All bases are soluble in water. Is this true or false?
Answer» All bases are soluble in water. Is this true or false?

Discussion

50.	Q. Mean free path of molecule of a gas is λ. If number of molecules as well as every linear dimensions ofcontainer is doubled , its mean free path will become (1) (2) 4λ (3) 2λ (4) λ/2
Answer» Q. Mean free path of molecule of a gas is λ. If number of molecules as well as every linear dimensions ofcontainer is doubled , its mean free path will become (1) (2) 4λ (3) 2λ (4) λ/2

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

If the radius of 2nd Bohr orbit of hydrogen atom is r2, then the radius of the third Bohr orbit will be:

ethyl acetate reacts with excess CH_3MgBr to form: give step by step explanatio

Magnetic susceptibility of paramagnetic substances is around hundred times higher than that of diamagnetic substances.Explain.

Two containers P and Q equal volume (1 liter each) contain 6g of O2 and SO2respectively at 300 K and 1atmosphere, thenNumber of molecules in P is less than that in Q Number of molecules in P and Q is same Number of molecules in Q is less than that in P Either (a) or (b).

how does water vapours have same composition that of water?

The rate constant for the first-order reaction, 2N2O5 → 4NO2 + O2 is 3.0 × 10−5 s−1. If the rate is 2.40 × 10−5 molL s−1, then the initial concentration of N2O5 (in molL) is

Match List-I with List-II. List-I Chemical CompoundList-II Used as(a)Sucralose(i) Synthetic detergent(b) Glyceryl ester of steric acid(ii)Artificial sweetener(c) Sodium benzoate(iii)Antiseptic (d)Bithionol(iv)Food preservativeChoose the correct match:

One mole each of H3PO2, H3PO3 and H3PO4 will neutralize 'x' mol of NaOH,'y' mol of Ca(OH)2 and 'z' mol of Al(OH)3 (assuming all to be strong electrolytes) respectively. x,y and z are in the ratio:

Hybridisation of Ni(CO)4 complex

Give the number of electron in the species H+,H and O+?

Which will undergo reaction with ammonical AgNO3?

Do only compunds exist as solids?(Don't elements exist as solids?)Why?

Why the Bond dissociation energy of Cl-Cl is greater than F-F. And why the Bond Dissociation energy of H-F is greater than H-H.

Which of the following graph(s) will correspond to a SN1 reaction mechanism?

what is max. no. of electrons that can be associated with the following set of quantum numbers n=3 ,l=2

A column of mercury of length of length h=10 cm is contained in the middle of a narrow horizontal tube of length 1m closed at ends.The air in both halves of the tube is under a pressure of p =76 cm of Hg .The tube is now slowly made vertical.The dis†an ce moved by mercury will be

24. number quantum magnetic is What

The major monohalo product in the reaction is Identify the product X.

0.01 M solutions of urea, common salt and sodium sulphate are taken The ratio of depression of freezing point will be in the ratio

17. which one of the following compounds will give thermodynamically as well as kinetically controlled product with HBr ?Options: CH3-CH= CH2 CH3-CH= CH-CH3 CH3-CH2-CH=CH-CH= CH2

What is the significance of the term half filled atomic orbitals in the valance bond theory

38. 20gms of an organic compound used NH_3 which is completely neutralised by 0.2 mole of H_2SO_4 . Find %of N.

Ametal has a fcc lattice . The edge length of the unit cell is 404 pm. Thedensity of the metal is 2.72 g cm-3. The molar mass of the metal is:(NAAvogadro's constant =6.02×1023 mol-1)

Cu2++NH3⇌[Cu(NH3)]2+;K1=104[Cu(NH3)]2++NH3⇌[Cu(NH3)2]2+;K2=1.58×103[Cu(NH3)2]2++NH3⇌[Cu(NH3)3]2+;K3=5×102[Cu(NH3)3]2++NH3⇌[Cu(NH3)4]2+;K4=102If the dissociation constant of [Cu(NH3)4]2+is X×10−12. Determine X.

CH3-Ch=Ch-C_=Ch ----Hbr--->a The product a is(1)CH3 -Ch -Br -ch2- c_=ch(2)CH3 CH CH BR ch2

Consider the following list of regents:Cu2+, conc. H2SO4,Cl2,(HNO2+CH3COOH),AgNO3The total number of reagents that can oxidize aqueous iodide to iodine is

product obtained when cyclohexene is oxidised withacidicpotassium dichromatewil be 1.succinic acid 2.adipicacid 3.benzoic acid 4.terephthalic aci

22. Which of the following reaction is incorrect ? (1) KBr3 + I2 → KI3 + Br2 (2) KCl3 + F2→ KF3 + Cl2 (3) KBr3 + Cl2 → KCl3 + Br2 (4) Li2O + KCl → K2O + LiCl

Gaseous metal ion M2+ has 5 unpaired electrons. What is the atomic number?

The density of liquid mercury is 13.6 g cm−3. How many moles of mercury are there in 1 litre of the metal? (Atomic mass of Hg=200)

How did tan alpha came in Edue to short dipole at general point

The molar concentration of Ht ion when 300 ml ofwater is added in 0.1 M 200 ml of H2SO, solution is(1) 0.08 M(3) 0.01 M(2) 0.1 M(4) 0.8 M

A polar covalent bond will be formed in which one of these pair of atoms:

If

The rate constant for the forward reaction A(g)⇌B(g) is 2×10−3s−1 at 300 K. If 10 moles of A and 1000 mole of B are present in a 100 L container at equilibrium then rate constant for the backward reaction will be:

An uranium ore sample contains 1g U^238 and 0.2 g Pb^206. Assume that all Pb ^206 is obtained from U^238. The t1/2 of U^238 is 4.5 ×10^9 years. The age of Uranium ore sample is Option(1) 3× 10^9 (2) 1.5× 10^9 (3) 4×10^9 (4)3× 10^8

The strongest base among the following is

What is the chemical name of the compound with chemical formula C5H8?

The velocity of an electron in the orbit of hydrogen atom is 5.47×105 m/s. Total number of waves formed by the electron in one complete revolution is: (give the answer in the nearest integer value)

What is the hybridization of NO and triiodine monoanion?

Briefly explain the process of electrolysis of molten Lead Bromide

Two samples A and B initially at the same temperature and pressure and compressed from volume V to V/2 ( A is isothermally and B adiabatic ally).The final pressure

{How many moles of NaOH should be added to 5 moles of CH}}_3{COOH to get a pH of 5.44? Given that pK}}_b(CH3CO0}^-)=9.26. [log 5=0.7] }(}1)4.16 (2)4.74 (3)3.74 (4)5.4

CsBr has similar type structure as of CsCl with edge length of 6 pm. The shortest inter ionic distance in between Cs+ and Br− is:

Sodium crystallises in body-centred cubic lattice structure has edge length of unit cell 400 pm. The density (in g cm) will be

CO2 gas is easily liquefied than O2, because :(1) a' and 'b' of CO2> a' and 'b' of O,(van der Waal's constants)(2) 'a' and 'b' of CO2< a' and 'b' of O2(3) 'a' of CO2>'a' of O2; 'b' of CO2< 'b' of O,(4a of CO2(< a' of O2; ^° b' of CO2 > 'b' of O2

[ Fe(H2O )6]3+ and Fe(CN)6]3- DIFFER IN

All bases are soluble in water. Is this true or false?

Q. Mean free path of molecule of a gas is λ. If number of molecules as well as every linear dimensions ofcontainer is doubled , its mean free path will become (1) (2) 4λ (3) 2λ (4) λ/2