46295 + Interview Questions in Chemistry

1.	What are the five uses of Plaster of Paris?
Answer» What are the five uses of Plaster of Paris?

Discussion

2.	why in the case of noble gases we are considering wandwe waal radii why not covalent radii?
Answer» why in the case of noble gases we are considering wandwe waal radii why not covalent radii?

Discussion

3.	The energy of an electron in the first Bohr orbit of H-atom is –13.6 eV. The possible energy value(s) of the excited state(s) for electrons in Bohr's orbits of hydrogen is (are):
Answer» The energy of an electron in the first Bohr orbit of $H$ -atom is $- 13.6 e V$ . The possible energy value(s) of the excited state(s) for electrons in Bohr's orbits of hydrogen is (are):

Discussion

4.	2-phenylethanol may be prepared by the reaction of phenyl magnesium bromide with
Answer» 2-phenylethanol may be prepared by the reaction of phenyl magnesium bromide with

Discussion

5.	can be used by the farmers to treat their acidic soil.
Answer» can be used by the farmers to treat their acidic soil.

Discussion

6.	Which of the following amines cannot be prepared by Gabriel phthalimide reaction?
Answer» Which of the following amines cannot be prepared by Gabriel phthalimide reaction?

Discussion

7.	Which of the following has the maximum solubility in water?
Answer» Which of the following has the maximum solubility in water?

Discussion

8.	A proton is projected with a velocity v towards another proton at rest from dis†an t point then dis†an ce of closest approch will b
Answer» A proton is projected with a velocity v towards another proton at rest from dis†an t point then dis†an ce of closest approch will b

Discussion

9.	0.96g of HI were heated to attain equilibrium 2HI⇌H2+I2. The reaction mixture on titration requires 15.7ml of N10 hypo. Calculate % dissociation of HI.
Answer» 0.96g of HI were heated to attain equilibrium $2 H I ⇌ H 2 + I 2$ . The reaction mixture on titration requires 15.7ml of $\frac{N}{10}$ hypo. Calculate % dissociation of HI.

9.

0.96g of HI were heated to attain equilibrium 2HI⇌H2+I2. The reaction mixture on titration requires 15.7ml of N10 hypo. Calculate % dissociation of HI.

Answer»

0.96g of HI were heated to attain equilibrium

$2 H I ⇌ H 2 + I 2$ . The reaction mixture on titration requires 15.7ml of $\frac{N}{10}$ hypo. Calculate % dissociation of HI.

Discussion

10.	The molecular velocities of two gases at same temperature are u1 and u2, their molar masses are m1 and m2 respectively. Which of the following expression is correct?
Answer» The molecular velocities of two gases at same temperature are $u_{1}$ and $u_{2}$ , their molar masses are $m_{1}$ and $m_{2}$ respectively. Which of the following expression is correct?

Discussion

11.	Kp, Keq, Kc are aplplicable in which of the states of matter?
Answer» Kp, Keq, Kc are aplplicable in which of the states of matter?

Discussion

12.	2,3-dimethyl-2butene + Li/liq. NH3 gives
Answer» 2,3-dimethyl-2butene + Li/liq. NH3 gives

Discussion

13.	Explain the fourth rule of significant figures.
Answer» Explain the fourth rule of significant figures.

Discussion

14.	ntWhich of the following compounds do not exist. Explain with reason .n ntPBr3 ,PCl3 ,PI3 ,PF3 ,CI4 ,CBr4 ,PI5 ,PBr5 ,PH5 ,SI2 ,SF2 ,SCl2 ,SBr2 ,OI2 ,OBr2n
Answer» ntWhich of the following compounds do not exist. Explain with reason .n ntPBr3 ,PCl3 ,PI3 ,PF3 ,CI4 ,CBr4 ,PI5 ,PBr5 ,PH5 ,SI2 ,SF2 ,SCl2 ,SBr2 ,OI2 ,OBr2n

Discussion

15.	Explain the term target molecules or drug targets as used in medicinal chemistry.
Answer» Explain the term target molecules or drug targets as used in medicinal chemistry.

Discussion

16.	The correct order of M – C bond energy is
Answer» The correct order of M – C bond energy is

Discussion

17.	What is the number of oxygen atoms which are shared between tetrahedrons in Si309-6
Answer» What is the number of oxygen atoms which are shared between tetrahedrons in Si309-6

Discussion

18.	Do electron withdrawing group increases reactivity towards nucleophilic addition reaction than electron donating group ? Is comparsion between benzaldehyde and propanal a exception to this?
Answer» Do electron withdrawing group increases reactivity towards nucleophilic addition reaction than electron donating group ? Is comparsion between benzaldehyde and propanal a exception to this?

Discussion

19.	What is defination of charge
Answer» What is defination of charge

Discussion

20.	Why is the conversion of ethanol to ethanoic acid an oxidation reaction?
Answer» Why is the conversion of ethanol to ethanoic acid an oxidation reaction?

Discussion

21.	Hydrogenation of benzoyl chloride in the presence of Pd supported on BaSO4 gives
Answer» Hydrogenation of benzoyl chloride in the presence of Pd supported on $B a S O_{4}$ gives

Discussion

22.	In the presence of AlCl3/HCl n-butane isomerizes to:
Answer» In the presence of $A l C l_{3} / H C l$ n-butane isomerizes to:

Discussion

23.	3. Which is the least effective substance for the coagulation of. Fe(OH)3 colloid?? K2SO4 K3PO4 KBr K[Fe(CN)6]
Answer» 3. Which is the least effective substance for the coagulation of. Fe(OH)3 colloid?? K2SO4 K3PO4 KBr K[Fe(CN)6]

Discussion

24.	Rani's weight is 25% that of Meena's and 40% that of Tara's. What percentage of Tara's weight is Meena's weight?
Answer» Rani's weight is 25% that of Meena's and 40% that of Tara's. What percentage of Tara's weight is Meena's weight?

Discussion

25.	when propene reacts with chlorine at800k why the pi bond is not cleaved
Answer» when propene reacts with chlorine at800k why the pi bond is not cleaved

Discussion

26.	Total number of sp hybridised atoms present in the given compound isCH2 = CH – C ≡ C — CN
Answer» Total number of sp hybridised atoms present in the given compound is CH2 = CH – C ≡ C — CN

Discussion

27.	Shape , hybridisation and bond order of NO2
Answer» Shape , hybridisation and bond order of NO2

Discussion

28.	How to find stability of carbonation in benzene
Answer» How to find stability of carbonation in benzene

Discussion

29.	Which of the following compound will not undergo azo coupling reaction with benzene diazonium chloride?
Answer» Which of the following compound will not undergo azo coupling reaction with benzene diazonium chloride?

Discussion

30.	if a complex number z moves that mod real Z bar + mod imaginary Z is equal to root 3 then the area bounded by all such positions of Z is
Answer» if a complex number z moves that mod real Z bar + mod imaginary Z is equal to root 3 then the area bounded by all such positions of Z is

Discussion

31.	IUPAC name of compound is
Answer» IUPAC name of compound is

Discussion

32.	Calculate the heat evolved when 496 g of white phosphorus P4 burns in air according to equation P4(s)+5O2(g)→P4O10(s) ΔH=−3013 kJ/mol
Answer» Calculate the heat evolved when 496 g of white phosphorus $P_{4}$ burns in air according to equation $P_{4} (s) + 5 O_{2} (g) \to P_{4} O_{10} (s)$ $Δ H = - 3013 k J / m o l$

Discussion

33.	nitrating mixture is obtained by mixing concentrated HNO3 and concentrated H2SO4. The role of the latter - H2SO4 is:
Answer» nitrating mixture is obtained by mixing concentrated $H N O_{3}$ and concentrated $H_{2} S O_{4}$ . The role of the latter - $H_{2} S O_{4}$ is:

Discussion

34.	39.The rate of reaction increases to 2.3 times when the temperature is raised from 300k to 310k. If K is the rate constant at 300k then the rate constant at 310k will be equal to-
Answer» 39.The rate of reaction increases to 2.3 times when the temperature is raised from 300k to 310k. If K is the rate constant at 300k then the rate constant at 310k will be equal to-

Discussion

35.	it is easy to give electron(like,electon gain enthalpy)for 4s1(half filled) 4p3( half filled
Answer» it is easy to give electron(like,electon gain enthalpy)for 4s1(half filled) 4p3( half filled

Discussion

36.	Explainthe following terms with suitable examples(i) Cationicdetergents(ii) Anionicdetergents and (iii) Non-ionicdetergents
Answer» Explain the following terms with suitable examples (i) Cationic detergents (ii) Anionic detergents and (iii) Non-ionic detergents

36.

Explainthe following terms with suitable examples(i) Cationicdetergents(ii) Anionicdetergents and (iii) Non-ionicdetergents

Answer»

Explain
the following terms with suitable examples

(i) Cationic
detergents

(ii) Anionic
detergents and

(iii) Non-ionic
detergents

Discussion

37.	12 The equilibrium const. for a reaction is 10. What will be value of G^° ?
Answer» 12 The equilibrium const. for a reaction is 10. What will be value of G^° ?

Discussion

38.	Hybridization of iodine in ICl2+ is
Answer» Hybridization of iodine in ${I C l_{2}}^{+}$ is

Discussion

39.	An incident radiation has wavelength 900 nm associated with it. Find the power rating of the source, if it is working at 30% efficiency and 4×1025 photons are crossing unit cross-section per second.
Answer» An incident radiation has wavelength $900 nm$ associated with it. Find the power rating of the source, if it is working at $30 %$ efficiency and $4 \times 10^{25}$ photons are crossing unit cross-section per second.

Discussion

40.	In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with
Answer» In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with

Discussion

41.	67. Calculate the molarity of 30 ml of 0. 5M H2So4 diluted to 500 ml.
Answer» 67. Calculate the molarity of 30 ml of 0. 5M H2So4 diluted to 500 ml.

Discussion

42.	R-O-R +HCl -----> product is
Answer» R-O-R +HCl -----> product is

Discussion

43.	basic strength order with proper explanation.als tell why there is solvation effect in 2.1. aniline2. 2,6-dimethyl-aniline3. 1,1-dimethyl aniline4. 2,6,1,1-dimethyl aniline
Answer» basic strength order with proper explanation.als tell why there is solvation effect in 2. 1. aniline 2. 2,6-dimethyl-aniline 3. 1,1-dimethyl aniline 4. 2,6,1,1-dimethyl aniline

Discussion

44.	A well-known antibiotic penicillin contains 57.49% of carbon, 5.39% of hydrogen, 8.39% of nitrogen, 9.58% of sulphur and the remainder being oxygen. Calculate the empirical formula of the antibiotic.
Answer» A well-known antibiotic penicillin contains 57.49% of carbon, 5.39% of hydrogen, 8.39% of nitrogen, 9.58% of sulphur and the remainder being oxygen. Calculate the empirical formula of the antibiotic.

Discussion

45.	How to decide whether ha\log enation via free radical mechanism will take place or not
Answer» How to decide whether ha\log enation via free radical mechanism will take place or not

Discussion

46.	How are interhalogen compounds formed? What general compositions can be assigned to them?
Answer» How are interhalogen compounds formed? What general compositions can be assigned to them?

Discussion

47.	Q 50/75 If in the given reaction, 312 + OH-105 2 moles ofiodine are taken, then the ratio of iodate and iodide ions formed inthe alkaline medium is
Answer» Q 50/75 If in the given reaction, 312 + OH-105 2 moles ofiodine are taken, then the ratio of iodate and iodide ions formed inthe alkaline medium is

Discussion

48.	The most unlikely representation of resonance structures of p-nitrophenoxide ion is :
Answer» The most unlikely representation of resonance structures of p-nitrophenoxide ion is :

Discussion

49.	When KMnO4 is reduced with oxalic acid in acidic solution, the change in oxidation number of Mn is
Answer» When $K M n O_{4}$ is reduced with oxalic acid in acidic solution, the change in oxidation number of $M n$ is

Discussion

50.	The electronic configuration of N in HNO2 is
Answer» The electronic configuration of N in $H N O_{2}$ is

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

What are the five uses of Plaster of Paris?

why in the case of noble gases we are considering wandwe waal radii why not covalent radii?

The energy of an electron in the first Bohr orbit of H-atom is –13.6 eV. The possible energy value(s) of the excited state(s) for electrons in Bohr's orbits of hydrogen is (are):

2-phenylethanol may be prepared by the reaction of phenyl magnesium bromide with

can be used by the farmers to treat their acidic soil.

Which of the following amines cannot be prepared by Gabriel phthalimide reaction?

Which of the following has the maximum solubility in water?

A proton is projected with a velocity v towards another proton at rest from dis†an t point then dis†an ce of closest approch will b

0.96g of HI were heated to attain equilibrium 2HI⇌H2+I2. The reaction mixture on titration requires 15.7ml of N10 hypo. Calculate % dissociation of HI.

The molecular velocities of two gases at same temperature are u1 and u2, their molar masses are m1 and m2 respectively. Which of the following expression is correct?

Kp, Keq, Kc are aplplicable in which of the states of matter?

2,3-dimethyl-2butene + Li/liq. NH3 gives

Explain the fourth rule of significant figures.

ntWhich of the following compounds do not exist. Explain with reason .n ntPBr3 ,PCl3 ,PI3 ,PF3 ,CI4 ,CBr4 ,PI5 ,PBr5 ,PH5 ,SI2 ,SF2 ,SCl2 ,SBr2 ,OI2 ,OBr2n

Explain the term target molecules or drug targets as used in medicinal chemistry.

The correct order of M – C bond energy is

What is the number of oxygen atoms which are shared between tetrahedrons in Si309-6

Do electron withdrawing group increases reactivity towards nucleophilic addition reaction than electron donating group ? Is comparsion between benzaldehyde and propanal a exception to this?

What is defination of charge

Why is the conversion of ethanol to ethanoic acid an oxidation reaction?

Hydrogenation of benzoyl chloride in the presence of Pd supported on BaSO4 gives

In the presence of AlCl3/HCl n-butane isomerizes to:

3. Which is the least effective substance for the coagulation of. Fe(OH)3 colloid?? K2SO4 K3PO4 KBr K[Fe(CN)6]

Rani's weight is 25% that of Meena's and 40% that of Tara's. What percentage of Tara's weight is Meena's weight?

when propene reacts with chlorine at800k why the pi bond is not cleaved

Total number of sp hybridised atoms present in the given compound isCH2 = CH – C ≡ C — CN

Shape , hybridisation and bond order of NO2

How to find stability of carbonation in benzene

Which of the following compound will not undergo azo coupling reaction with benzene diazonium chloride?

if a complex number z moves that mod real Z bar + mod imaginary Z is equal to root 3 then the area bounded by all such positions of Z is

IUPAC name of compound is

Calculate the heat evolved when 496 g of white phosphorus P4 burns in air according to equation P4(s)+5O2(g)→P4O10(s) ΔH=−3013 kJ/mol

nitrating mixture is obtained by mixing concentrated HNO3 and concentrated H2SO4. The role of the latter - H2SO4 is:

39.The rate of reaction increases to 2.3 times when the temperature is raised from 300k to 310k. If K is the rate constant at 300k then the rate constant at 310k will be equal to-

it is easy to give electron(like,electon gain enthalpy)for 4s1(half filled) 4p3( half filled

Explainthe following terms with suitable examples(i) Cationicdetergents(ii) Anionicdetergents and (iii) Non-ionicdetergents

12 The equilibrium const. for a reaction is 10. What will be value of G^° ?

Hybridization of iodine in ICl2+ is

An incident radiation has wavelength 900 nm associated with it. Find the power rating of the source, if it is working at 30% efficiency and 4×1025 photons are crossing unit cross-section per second.

In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with

67. Calculate the molarity of 30 ml of 0. 5M H2So4 diluted to 500 ml.

R-O-R +HCl -----> product is

basic strength order with proper explanation.als tell why there is solvation effect in 2.1. aniline2. 2,6-dimethyl-aniline3. 1,1-dimethyl aniline4. 2,6,1,1-dimethyl aniline

A well-known antibiotic penicillin contains 57.49% of carbon, 5.39% of hydrogen, 8.39% of nitrogen, 9.58% of sulphur and the remainder being oxygen. Calculate the empirical formula of the antibiotic.

How to decide whether ha\log enation via free radical mechanism will take place or not

How are interhalogen compounds formed? What general compositions can be assigned to them?

Q 50/75 If in the given reaction, 312 + OH-105 2 moles ofiodine are taken, then the ratio of iodate and iodide ions formed inthe alkaline medium is

The most unlikely representation of resonance structures of p-nitrophenoxide ion is :

When KMnO4 is reduced with oxalic acid in acidic solution, the change in oxidation number of Mn is

The electronic configuration of N in HNO2 is