46295 + Interview Questions in Chemistry

1.	Which of the following have same molecular formula?
Answer» Which of the following have same molecular formula?

Discussion

2.	(i) CO2−−−−−→(ii) H2OP In the reaction, product P is
Answer» $(i) C O_{2} - ---- \to (i i) H_{2} O P$ In the reaction, product P is

Discussion

3.	ASSIGN D OR L FORM IN THIS FISCHER PROJECTION FORMULA WITH PROPER STEPS: (OH)CH(COOH)-(COOH)CH(NH2)
Answer» ASSIGN D OR L FORM IN THIS FISCHER PROJECTION FORMULA WITH PROPER STEPS: (OH)CH(COOH)-(COOH)CH(NH2)

Discussion

4.

Match the following IUPAC names given in Column I with their common names given in Colum II and choose the correct option from the codes given below. Column I (IUPAC name) Column II (Common name)A.4-Methyl phenol1CatecholB.Benzene-1,4-diol2QuinolC.Benzene-1,2-diol3o-cresolD.2-Methyl phenol4p-cresol

Answer»

Match the following $I U P A C$ names given in Column $I$ with their common names given in Colum $I I$ and choose the correct option from the codes given below.

	Column $I$ ( $I U P A C$ name)		Column $I I$ (Common name)
$A .$	4-Methyl phenol	$1$	Catechol
$B .$	Benzene-1,4-diol	$2$	Quinol
$C .$	Benzene-1,2-diol	$3$	o-cresol
$D .$	2-Methyl phenol	$4$	p-cresol

Discussion

5.	Write the integrated rate equation for pseudo first order reaction
Answer» Write the integrated rate equation for pseudo first order reaction

Discussion

6.	100 mL of a 0.1 MNaCl solution is added to 300 mL of a 0.2 M MgCl2 solution. 100 mL of this solution was further diluted with 400 mL of water. The molarity of Cl− ions in the resultant solution is:
Answer» $100 mL$ of a $0.1 M N a C l$ solution is added to $300 mL$ of a $0.2 M$ $M g C l_{2}$ solution. $100 mL$ of this solution was further diluted with $400 mL$ of water. The molarity of $C l^{-}$ ions in the resultant solution is:

Discussion

7.	What is alpha and beta according to biology .biomolecules
Answer» What is alpha and beta according to biology .biomolecules

Discussion

8.	Rank in the order of increasing acidity :
Answer» Rank in the order of increasing acidity :

Discussion

9.	Can an atom with unpaired electron (eg: Cl) be called a free radical?
Answer» Can an atom with unpaired electron (eg: Cl) be called a free radical?

Discussion

10.	Possible alkenes form in the given reaction are:
Answer» Possible alkenes form in the given reaction are:

Discussion

11.	Two elements A and B combine to form compounds X and Y. For a fixed mass of A, the mass of B that combines to form the compounds X and Y are in the ratio 3:7. If in the compound X, 4 g of A combines with 12 g of B, then in compound Y, 8 g of A will combine with _______ g of B.
Answer» Two elements A and B combine to form compounds X and Y. For a fixed mass of A, the mass of B that combines to form the compounds X and Y are in the ratio $3 : 7$ . If in the compound X, $4 g$ of A combines with $12 g$ of B, then in compound Y, $8 g$ of A will combine with _______ $g$ of B.

Discussion

12.	For gaseous state, if most probale speed is denoted by C* , average speed by and mean square speed by ¯C, then for a large number of molecules the ratios of these speeds are
Answer» For gaseous state, if most probale speed is denoted by C* , average speed by and mean square speed by $¯ C$ , then for a large number of molecules the ratios of these speeds are

Discussion

13.	3.Calculate the number of waves made by a Bohr electron in one complete revolution in nth orbit of H atom.If the ratio of de-Broglie wavelength associated with electron moving in nth orbit and 2nd orbit is 1.5
Answer» 3.Calculate the number of waves made by a Bohr electron in one complete revolution in nth orbit of H atom.If the ratio of de-Broglie wavelength associated with electron moving in nth orbit and 2nd orbit is 1.5

Discussion

14.	where eletrophile attack in benzene rin
Answer» where eletrophile attack in benzene rin

Discussion

15.	what is valence bond theory?
Answer» what is valence bond theory?

Discussion

16.	Concentration of H2SO4 is 98% H2SO4 by mass and has density of 1.8 g/L. Volume of acid needed to make one litre of 0.1 M H2SO4
Answer» Concentration of H2SO4 is 98% H2SO4 by mass and has density of 1.8 g/L. Volume of acid needed to make one litre of 0.1 M H2SO4

Discussion

17.	what is carnot cycle?
Answer» what is carnot cycle?

Discussion

18.	If the bond energies of H–H, Br–Br, and H–Br are 433, 192 and 364 kJ mol–1 respectively, the ΔHo for the reaction H2(g)+Br2(g)→2HBr(g) is:
Answer» If the bond energies of $H - H$ , $B r - B r$ , and $H - B r$ are $433, 192$ and $364 {kJ mol}^{- 1}$ respectively, the $Δ H^{o}$ for the reaction $H_{2} (g) + B r_{2} (g) \to 2 H B r (g)$ is:

Discussion

19.	A(g)+3B(g)⇌4C(g) initial concentration of A is equal to that of B. The equilibrium concentration of A and C are equal. Kc of the reaction will be:
Answer» $A (g) + 3 B (g) ⇌ 4 C (g)$ initial concentration of A is equal to that of B. The equilibrium concentration of A and C are equal. $K_{c}$ of the reaction will be:

Discussion

20.	What is the difference between binding energy and Q value of reaction??
Answer» What is the difference between binding energy and Q value of reaction??

Discussion

21.	20% complete d reactant s in first order in 50min what is time required for 60% Ans is 98.6min whynot 150 pls put it on a paper
Answer» 20% complete d reactant s in first order in 50min what is time required for 60% Ans is 98.6min whynot 150 pls put it on a paper

21.

20% complete d reactant s in first order in 50min what is time required for 60% Ans is 98.6min whynot 150 pls put it on a paper

Answer»

20% complete d reactant s in first order in 50min what is time required for 60%

Ans is 98.6min whynot 150

pls put it on a paper

Discussion

22.	What are the differences in physical and chemical properties of cl and fluorine(like IE, EGE, Hydration enthalpy, reducing power,etc
Answer» What are the differences in physical and chemical properties of cl and fluorine(like IE, EGE, Hydration enthalpy, reducing power,etc

Discussion

23.	The first ionization potential of which of the element is highest
Answer» The first ionization potential of which of the element is highest

Discussion

24.	how many electrons are present in 1.6 gram of methane ch4 ?
Answer» how many electrons are present in 1.6 gram of methane ch4 ?

Discussion

25.	The standard enthalpies of formation at 300 K for CCl4(l), H2O (g), (CO2) and HCl(g) are −107,−242,−394 and−93 kJ mol−1, respectively. The value of △Uo300 for the reaction CCl4(l)+2H2O(g)→CO2(g)+4HCl(g) is
Answer» The standard enthalpies of formation at 300 K for $C C l_{4} (l), H_{2} O (g), (C O_{2}) a n d H C l (g) a r e - 107, - 242, - 394 a n d - 93 k J m o l^{- 1},$ respectively. The value of $△ U_{300}^{o}$ for the reaction $C C l_{4} (l) + 2 H_{2} O (g) \to C O_{2} (g) + 4 H C l (g)$ is

Discussion

26.	Calculate the frequency of a wave with wavelength 4×107 nm .
Answer» Calculate the frequency of a wave with wavelength $4 \times 10^{7}$ nm .

Discussion

27.	Which of the following cannot act as Lewis acid?
Answer» Which of the following cannot act as Lewis acid?

Discussion

28.	Which of the following describes the correct relation for pOH for an aqueous salt solution of weak acid and weak base at 25∘C ?
Answer» Which of the following describes the correct relation for $p O H$ for an aqueous salt solution of weak acid and weak base at $25^{\circ} C ?$

Discussion

29.	propiophenone reaction with phenylmagnesium bromide
Answer» propiophenone reaction with phenylmagnesium bromide

Discussion

30.	Which of the following violates the valence bond theory?
Answer» Which of the following violates the valence bond theory?

Discussion

31.	63. The order of reactivity of the following ketones towards nucleophilic addition of water is: 1)CH3COCH3,2)CF3COCF3,3)C6H5COC6H5 4),CCl3COCl3,
Answer» 63. The order of reactivity of the following ketones towards nucleophilic addition of water is: 1)CH3COCH3,2)CF3COCF3,3)C6H5COC6H5 4),CCl3COCl3,

Discussion

32.	59 Which of the following complex ions is expected to absorb visible light? (At.no. Zn = 30, Sc = 21, Ti = 22, Cr = 24) (1) [Ti(en)2(NH3)2]4+ (2) [Cr(NH3)6]3+ (3) [Zn(NH3)6]2+ (4) [Sc(H2O)3(NH3)3]3+
Answer» 59 Which of the following complex ions is expected to absorb visible light? (At.no. Zn = 30, Sc = 21, Ti = 22, Cr = 24) (1) [Ti(en)2(NH3)2]4+ (2) [Cr(NH3)6]3+ (3) [Zn(NH3)6]2+ (4) [Sc(H2O)3(NH3)3]3+

Discussion

33.	Phosphoric acid (H3PO4) is prepared in a two-step process:(1) P4+5O2→P4O10(2) P4O10+6H2O→4H3PO4In step (1), 62 g of phosphorus is made to react with excess oxygen to form P4O10 with 85 % yield. In step (2), the yield of H3PO4 obtained is 90 %. Calculate the mass of H3PO4 produced.
Answer» Phosphoric acid $(H_{3} P O_{4})$ is prepared in a two-step process: (1) $P_{4} + 5 O_{2} \to P_{4} O_{10}$ (2) $P_{4} O_{10} + 6 H_{2} O \to 4 H_{3} P O_{4}$ In step (1), $62 g$ of phosphorus is made to react with excess oxygen to form $P_{4} O_{10}$ with 85 % yield. In step (2), the yield of $H_{3} P O_{4}$ obtained is 90 %. Calculate the mass of $H_{3} P O_{4}$ produced.

Discussion

34.	there are certain material developed in the laboratory is which have a negative index array incident from air into such a medium shall follow up at given by
Answer» there are certain material developed in the laboratory is which have a negative index array incident from air into such a medium shall follow up at given by

Discussion

35.	State two physical properties of ammonia which enable its separation from mixture of ammonia, hydrogen and nitrogen.
Answer» State two physical properties of ammonia which enable its separation from mixture of ammonia, hydrogen and nitrogen.

Discussion

36.	Which among the following molecules has a permanent dipole moment?
Answer» Which among the following molecules has a permanent dipole moment?

Discussion

37.	Bleaching action of chlorine is due to:
Answer» Bleaching action of chlorine is due to:

Discussion

38.	47. I2_2I is a reversible reaction . which factor will favour forward reaction A_increase in concentration of 2I B_increase in temperature C_both a,b D_Decrease in concentration of I2 Given delta Hfor reaction is +150
Answer» 47. I2_2I is a reversible reaction . which factor will favour forward reaction A_increase in concentration of 2I B_increase in temperature C_both a,b D_Decrease in concentration of I2 Given delta Hfor reaction is +150

Discussion

39.	WriteIUPAC names of the following compounds:a. b. c. d. e. f. g.
Answer» Write IUPAC names of the following compounds: a. b. c. d. e. f. g.

39.

WriteIUPAC names of the following compounds:a. b. c. d. e. f. g.

Answer»

Write
IUPAC names of the following compounds:

a.

b.

c.

d.

e.

f.

g.

Discussion

40.	Work done in reversible adiabatic process is numerically not equal to:
Answer» Work done in reversible adiabatic process is numerically not equal to:

Discussion

41.	specific rotation of an optically pure compound (X) is +40. in a reaction the compound (X) is obtained through a series of chemical reactions . if the specific rotation of the solution is -20, what would be the percentage of laevorotatory isomer in solutio
Answer» specific rotation of an optically pure compound (X) is +40. in a reaction the compound (X) is obtained through a series of chemical reactions . if the specific rotation of the solution is -20, what would be the percentage of laevorotatory isomer in solutio

Discussion

42.	In a first order reaction the concentration of reactant decrease from 800 mol/dm3 to 50 mo/dm3 in 2×104 sec. The rate constant of reaction in sec-1 is:
Answer» In a first order reaction the concentration of reactant decrease from 800 mol/dm³ to 50 mo/dm³ in 2×10⁴ sec. The rate constant of reaction in sec^-1 is:

Discussion

43.	The enthalpy change for a reaction does not depend upon
Answer» The enthalpy change for a reaction does not depend upon

Discussion

44.	Identify (X) and (Y) in the following reaction sequences.
Answer» Identify (X) and (Y) in the following reaction sequences.

Discussion

45.	If x>0 and y
Answer» If x>0 and y<0, then the point (X,-y) lies in________

Discussion

46.	49 Determine the value of equilibrium constant for the reaction A + B = 2C If 1.0 mol. Of A , 1.4 mol. Of B , and 0.50 mol. Of C are placed in a 1.0 L vessel and allowed to come to equilibrium. The final concentration of C is 0.75 mol/L.
Answer» 49 Determine the value of equilibrium constant for the reaction A + B = 2C If 1.0 mol. Of A , 1.4 mol. Of B , and 0.50 mol. Of C are placed in a 1.0 L vessel and allowed to come to equilibrium. The final concentration of C is 0.75 mol/L.

Discussion

47.	Difference between Kp and Kc?
Answer» Difference between Kp and Kc?

Discussion

48.	A samll bubble rises from the bottom of a lake, where the temperature and pressure are 8∘C and 6.0 atm, to the water's surface, where the temperature is 25∘°C and pressure is 1.0 atm. Calculate the final volume of the bubble if its initial volume was 2 mL
Answer» A samll bubble rises from the bottom of a lake, where the temperature and pressure are $8^{\circ}$ C and 6.0 atm, to the water's surface, where the temperature is $25^{\circ}$ °C and pressure is 1.0 atm. Calculate the final volume of the bubble if its initial volume was 2 mL

Discussion

49.	Derive the formula of entropy
Answer» Derive the formula of entropy

Discussion

50.	How would you distinguish between the following set of compounds? zinc chloride and calcium chloride
Answer» How would you distinguish between the following set of compounds? zinc chloride and calcium chloride

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Which of the following have same molecular formula?

(i) CO2−−−−−→(ii) H2OP In the reaction, product P is

ASSIGN D OR L FORM IN THIS FISCHER PROJECTION FORMULA WITH PROPER STEPS: (OH)CH(COOH)-(COOH)CH(NH2)

Match the following IUPAC names given in Column I with their common names given in Colum II and choose the correct option from the codes given below. Column I (IUPAC name) Column II (Common name)A.4-Methyl phenol1CatecholB.Benzene-1,4-diol2QuinolC.Benzene-1,2-diol3o-cresolD.2-Methyl phenol4p-cresol

Write the integrated rate equation for pseudo first order reaction

100 mL of a 0.1 MNaCl solution is added to 300 mL of a 0.2 M MgCl2 solution. 100 mL of this solution was further diluted with 400 mL of water. The molarity of Cl− ions in the resultant solution is:

What is alpha and beta according to biology .biomolecules

Rank in the order of increasing acidity :

Can an atom with unpaired electron (eg: Cl) be called a free radical?

Possible alkenes form in the given reaction are:

Two elements A and B combine to form compounds X and Y. For a fixed mass of A, the mass of B that combines to form the compounds X and Y are in the ratio 3:7. If in the compound X, 4 g of A combines with 12 g of B, then in compound Y, 8 g of A will combine with _______ g of B.

For gaseous state, if most probale speed is denoted by C* , average speed by and mean square speed by ¯C, then for a large number of molecules the ratios of these speeds are

3.Calculate the number of waves made by a Bohr electron in one complete revolution in nth orbit of H atom.If the ratio of de-Broglie wavelength associated with electron moving in nth orbit and 2nd orbit is 1.5

where eletrophile attack in benzene rin

what is valence bond theory?

Concentration of H2SO4 is 98% H2SO4 by mass and has density of 1.8 g/L. Volume of acid needed to make one litre of 0.1 M H2SO4

what is carnot cycle?

If the bond energies of H–H, Br–Br, and H–Br are 433, 192 and 364 kJ mol–1 respectively, the ΔHo for the reaction H2(g)+Br2(g)→2HBr(g) is:

A(g)+3B(g)⇌4C(g) initial concentration of A is equal to that of B. The equilibrium concentration of A and C are equal. Kc of the reaction will be:

What is the difference between binding energy and Q value of reaction??

20% complete d reactant s in first order in 50min what is time required for 60% Ans is 98.6min whynot 150 pls put it on a paper

What are the differences in physical and chemical properties of cl and fluorine(like IE, EGE, Hydration enthalpy, reducing power,etc

The first ionization potential of which of the element is highest

how many electrons are present in 1.6 gram of methane ch4 ?

The standard enthalpies of formation at 300 K for CCl4(l), H2O (g), (CO2) and HCl(g) are −107,−242,−394 and−93 kJ mol−1, respectively. The value of △Uo300 for the reaction CCl4(l)+2H2O(g)→CO2(g)+4HCl(g) is

Calculate the frequency of a wave with wavelength 4×107 nm .

Which of the following cannot act as Lewis acid?

Which of the following describes the correct relation for pOH for an aqueous salt solution of weak acid and weak base at 25∘C ?

propiophenone reaction with phenylmagnesium bromide

Which of the following violates the valence bond theory?

63. The order of reactivity of the following ketones towards nucleophilic addition of water is: 1)CH3COCH3,2)CF3COCF3,3)C6H5COC6H5 4),CCl3COCl3,

59 Which of the following complex ions is expected to absorb visible light? (At.no. Zn = 30, Sc = 21, Ti = 22, Cr = 24) (1) [Ti(en)2(NH3)2]4+ (2) [Cr(NH3)6]3+ (3) [Zn(NH3)6]2+ (4) [Sc(H2O)3(NH3)3]3+

Phosphoric acid (H3PO4) is prepared in a two-step process:(1) P4+5O2→P4O10(2) P4O10+6H2O→4H3PO4In step (1), 62 g of phosphorus is made to react with excess oxygen to form P4O10 with 85 % yield. In step (2), the yield of H3PO4 obtained is 90 %. Calculate the mass of H3PO4 produced.

there are certain material developed in the laboratory is which have a negative index array incident from air into such a medium shall follow up at given by

State two physical properties of ammonia which enable its separation from mixture of ammonia, hydrogen and nitrogen.

Which among the following molecules has a permanent dipole moment?

Bleaching action of chlorine is due to:

47. I2_2I is a reversible reaction . which factor will favour forward reaction A_increase in concentration of 2I B_increase in temperature C_both a,b D_Decrease in concentration of I2 Given delta Hfor reaction is +150

WriteIUPAC names of the following compounds:a. b. c. d. e. f. g.

Work done in reversible adiabatic process is numerically not equal to:

specific rotation of an optically pure compound (X) is +40. in a reaction the compound (X) is obtained through a series of chemical reactions . if the specific rotation of the solution is -20, what would be the percentage of laevorotatory isomer in solutio

In a first order reaction the concentration of reactant decrease from 800 mol/dm3 to 50 mo/dm3 in 2×104 sec. The rate constant of reaction in sec-1 is:

The enthalpy change for a reaction does not depend upon

Identify (X) and (Y) in the following reaction sequences.

If x>0 and y

49 Determine the value of equilibrium constant for the reaction A + B = 2C If 1.0 mol. Of A , 1.4 mol. Of B , and 0.50 mol. Of C are placed in a 1.0 L vessel and allowed to come to equilibrium. The final concentration of C is 0.75 mol/L.

Difference between Kp and Kc?

A samll bubble rises from the bottom of a lake, where the temperature and pressure are 8∘C and 6.0 atm, to the water's surface, where the temperature is 25∘°C and pressure is 1.0 atm. Calculate the final volume of the bubble if its initial volume was 2 mL

Derive the formula of entropy

How would you distinguish between the following set of compounds? zinc chloride and calcium chloride