46295 + Interview Questions in Chemistry

1.	Silicon dioxide ,made of elements silicon and oxygen contains 46.7% by mass of silicon.With what mass of oxygen will 10 g of silicon combine?
Answer» Silicon dioxide ,made of elements silicon and oxygen contains 46.7% by mass of silicon.With what mass of oxygen will 10 g of silicon combine?

Discussion

2.	The alkali metals form salt-like hydrides by the direct synthesis at elevated temperature. The thermal stability of these hydrides decreases in which of the following orders?
Answer» The alkali metals form salt-like hydrides by the direct synthesis at elevated temperature. The thermal stability of these hydrides decreases in which of the following orders?

Discussion

3.	29 electrons are removed from Zn atom (Z=30) by certain means. The minimum energy needed to remove the 30th electron will be-
Answer» $29$ electrons are removed from $Zn$ atom $(Z = 30)$ by certain means. The minimum energy needed to remove the $30^{t h}$ electron will be-

Discussion

4.	which of the following molecule is polar1] PF3Cl2 2] PCl5 3] PCl3F2 4] XeF4
Answer» which of the following molecule is polar 1] PF3Cl2 2] PCl5 3] PCl3F2 4] XeF4

Discussion

5.	The ionic radii (in A∘) of N3−, O2− and F− are respectively:
Answer» The ionic radii (in $A^{\circ}$ ) of $N^{3 -}$ , $O^{2 -}$ and $F^{-}$ are respectively:

Discussion

6.	1. Blue litmus paper is dipped in a solution. It remains blue. What is the nature of the solution? Explain. 2. Factory waste is neutralised before disposing it into the water bodies. Why?
Answer» 1. Blue litmus paper is dipped in a solution. It remains blue. What is the nature of the solution? Explain. 2. Factory waste is neutralised before disposing it into the water bodies. Why?

6.

1. Blue litmus paper is dipped in a solution. It remains blue. What is the nature of the solution? Explain. 2. Factory waste is neutralised before disposing it into the water bodies. Why?

Answer»

1. Blue litmus paper is dipped in a solution. It remains blue. What is the nature of the solution? Explain.

2. Factory waste is neutralised before disposing it into the water bodies. Why?

Discussion

7.	2 Inert pair effect represents the electrons of the valence electrons to be available for bonding as compared to the valence electrons "&quotdue to their greater penetration in the nucleus""
Answer» 2 Inert pair effect represents the electrons of the valence electrons to be available for bonding as compared to the valence electrons ""due to their greater penetration in the nucleus""

Discussion

8.	47. How many electrons present in 10g CH4?
Answer» 47. How many electrons present in 10g CH4?

Discussion

9.	The correct order of first ionization energy is(1) Fe >Co > Ni(3) Co > Fe > No52.Ni>Co > Fe(4) Ni> Fe> Co
Answer» The correct order of first ionization energy is(1) Fe >Co > Ni(3) Co > Fe > No52.Ni>Co > Fe(4) Ni> Fe> Co

Discussion

10.	Buckminsterfullerene (C60) contains how many five membered rings?
Answer» Buckminsterfullerene $(C_{60})$ contains how many five membered rings?

Discussion

11.	If R is the radius of the octahedral voids and 'r' is the radius of the atom in close packing, then rR is equal to
Answer» If R is the radius of the octahedral voids and 'r' is the radius of the atom in close packing, then $\frac{r}{R}$ is equal to

Discussion

12.	83. Dissolving 120 g urea (mol.wt.60) in 1000 g of water gave a solution of density 1.15 g/ml , the molar - ity of the solution is
Answer» 83. Dissolving 120 g urea (mol.wt.60) in 1000 g of water gave a solution of density 1.15 g/ml , the molar - ity of the solution is

Discussion

13.	Which represents theelectronic configuration of the most electropositive element?
Answer» Which represents the electronic configuration of the most electropositive element?

Discussion

14.	Which one among the following is not an analgesics?
Answer» Which one among the following is not an analgesics?

Discussion

15.	Which of the following statements are correct about the reactivities of (I) n -propyl chloride and (II) allyl chloride.
Answer» Which of the following statements are correct about the reactivities of (I) n -propyl chloride and (II) allyl chloride.

Discussion

16.	How will recognise that a given reaction taking place in forward and backward direction to be exothermic or exothermic
Answer» How will recognise that a given reaction taking place in forward and backward direction to be exothermic or exothermic

Discussion

17.	What are the uses of products obtained from the chlor alkali process?
Answer» What are the uses of products obtained from the chlor alkali process?

Discussion

18.	How many stereoisomers does this molecule have?CH3CH=CHCH2CHBrCH3
Answer» How many stereoisomers does this molecule have? $C H_{3} C H = C H C H_{2} C H B r C H_{3}$

Discussion

19.	74.The ratio of no.of collision per second at the walls of container by He and oxygen gas molecules kept at same volume and temperature will be(assume normal incidence on walls)
Answer» 74.The ratio of no.of collision per second at the walls of container by He and oxygen gas molecules kept at same volume and temperature will be(assume normal incidence on walls)

Discussion

20.	Depression in freezing point of 0.01 moll aqueous HCOOH solution is 0.02046. 1 molal aqueous urea solution freezes at - 1.86 ^°C, assuming molality equal to molarity, pH oh HCOOH solution is
Answer» Depression in freezing point of 0.01 moll aqueous HCOOH solution is 0.02046. 1 molal aqueous urea solution freezes at - 1.86 ^°C, assuming molality equal to molarity, pH oh HCOOH solution is

Discussion

21.	During the adsorption of Krypton on activated charcoal at low temperature, which of the following is true?
Answer» During the adsorption of Krypton on activated charcoal at low temperature, which of the following is true?

Discussion

22.	The correct order of decreasing second ionisation enthalpy of Ti(22), V(23), Cr(24) and Mn(25) is [CBSE AIPMT 2008]
Answer» The correct order of decreasing second ionisation enthalpy of Ti(22), V(23), Cr(24) and Mn(25) is [CBSE AIPMT 2008]

Discussion

23.	84 Is nitrogen trichloride polar or nonpolar.Why?
Answer» 84 Is nitrogen trichloride polar or nonpolar.Why?

Discussion

24.	70. Can 3-butanolide be named as 3-methyl-2-oxacyclobutanone.Why/Whynot?
Answer» 70. Can 3-butanolide be named as 3-methyl-2-oxacyclobutanone.Why/Whynot?

Discussion

25.	How to solve the limit problem in easy and simple way ??
Answer» How to solve the limit problem in easy and simple way ??

Discussion

26.	Which has higher b. p. Ortho hydrogen or para hydrogen?
Answer» Which has higher b. p. Ortho hydrogen or para hydrogen?

Discussion

27.	25. Calculate the pH of 0.625M solution of CH3COOH is (ka for CH3COOH is 1.754 into 10 to the power minus 5) A)8.25. B)9.28 C )10.2. D) 11.26
Answer» 25. Calculate the pH of 0.625M solution of CH3COOH is (ka for CH3COOH is 1.754 into 10 to the power minus 5) A)8.25. B)9.28 C )10.2. D) 11.26

Discussion

28.	The vapours of Hg absorb some electrons accelerated by a potential difference of 9.0 eV, as a result of which, light is emitted. If the 25% of energy of a single incident electron is supposed to be converted into light emitted by a single Hg atom, find the wave number 1λ of the light.(Take: Planck's constant (h) =6.6×10−34 Js)
Answer» The vapours of $H g$ absorb some electrons accelerated by a potential difference of $9.0 eV$ , as a result of which, light is emitted. If the 25% of energy of a single incident electron is supposed to be converted into light emitted by a single $H g$ atom, find the wave number $\frac{1}{λ}$ of the light. (Take: Planck's constant (h) = $6.6 \times 10^{- 34} J s$ )

Discussion

29.	2.38g uranium was heated strongly in a current of air. the resulting oxide weighted 2.806 g. determine the empirical formula of the oxide? A) U4O8 B) U3O8 C) U9O5 D) U1O9
Answer» 2.38g uranium was heated strongly in a current of air. the resulting oxide weighted 2.806 g. determine the empirical formula of the oxide? A) U4O8 B) U3O8 C) U9O5 D) U1O9

29.

2.38g uranium was heated strongly in a current of air. the resulting oxide weighted 2.806 g. determine the empirical formula of the oxide? A) U4O8 B) U3O8 C) U9O5 D) U1O9

Answer»

2.38g uranium was heated strongly in a current of air. the resulting oxide weighted 2.806 g. determine the empirical formula of the oxide?

A) U4O8

B) U3O8

C) U9O5

D) U1O9

Discussion

30.	What percent of a sample of nitrogen must be allowed to escaped if its temperature ,preesure and volume are to be changed from 220 degree c ,3atm,1.00litre respectively?
Answer» What percent of a sample of nitrogen must be allowed to escaped if its temperature ,preesure and volume are to be changed from 220 degree c ,3atm,1.00litre respectively?

Discussion

31.	How many of the following is/are the incorrect statement about silicones1.They are made up of Si4−4 units2.They are polymers made up of R2SiO units3.They are water soluble compounds. 4.They are hydrophilic in nature
Answer» How many of the following is/are the incorrect statement about silicones 1.They are made up of $S i_{4}^{4 -}$ units 2.They are polymers made up of $R_{2} S i O$ units 3.They are water soluble compounds. 4.They are hydrophilic in nature

Discussion

32.	when nh4oh is added dropwise and dilute solution of fecl3 then how feoh3 is negative ? Does fe ion not surround the colloid as it is in more conc. because it is in medium ?
Answer» when nh4oh is added dropwise and dilute solution of fecl3 then how feoh3 is negative ? Does fe ion not surround the colloid as it is in more conc. because it is in medium ?

Discussion

33.	CH3CH2CH2OH and CH3CH2OCH3 are:
Answer» $C H_{3} C H_{2} C H_{2} O H a n d C H_{3} C H_{2} O C H_{3}$ are:

Discussion

34.	What is the coordination number in a square close-packed structure in two dimensions? (a) 2 (b) 3 (c) 4 (d) 6
Answer» What is the coordination number in a square close-packed structure in two dimensions? (a) 2 (b) 3 (c) 4 (d) 6

34.

What is the coordination number in a square close-packed structure in two dimensions? (a) 2 (b) 3 (c) 4 (d) 6

Answer»

What is the coordination number in a square close-packed structure in two dimensions?

(a) 2 (b) 3 (c) 4 (d) 6

Discussion

35.	What will be the oder of reactivity of the following carbonyl compound with Grignard's reagent?
Answer» What will be the oder of reactivity of the following carbonyl compound with Grignard's reagent?

Discussion

36.	In the above reactions, the possible amines produced as A and B, are respectively:
Answer» In the above reactions, the possible amines produced as A and B, are respectively:

Discussion

37.	Depression in freezing point for 1M nacl
Answer» Depression in freezing point for 1M nacl

Discussion

38.	a mixture contains 1 moles of monoatomic gas and 2 moles of diatomic gas . then what is the value of γ.
Answer» a mixture contains 1 moles of monoatomic gas and 2 moles of diatomic gas . then what is the value of γ.

Discussion

39.	State differences between acids and bases.
Answer» State differences between acids and bases.

Discussion

40.	Which of the following is the strongest oxidant:
Answer» Which of the following is the strongest oxidant:

Discussion

41.	7.5 grams of a gas occupy 5.8 litres of volume at STP the gas is
Answer» 7.5 grams of a gas occupy 5.8 litres of volume at STP the gas is

Discussion

42.	ntTwo components in the ratio of x : y form an azeotropic mixture. They are mixed in the ratio of x : 2y, how many moles one of the pure component y will be evaporated before getting azeotropic solution?n
Answer» ntTwo components in the ratio of x : y form an azeotropic mixture. They are mixed in the ratio of x : 2y, how many moles one of the pure component y will be evaporated before getting azeotropic solution?n

Discussion

43.	The total number of neutrons in dipositive zinc ions with mass number 70 is
Answer» The total number of neutrons in dipositive zinc ions with mass number 70 is

43.

The total number of neutrons in dipositive zinc ions with mass number 70 is

Answer»

The total number of neutrons in dipositive zinc ions with mass number 70 is

Discussion

44.	which one of the following is most effective for coagulation of positively chareged colloid? K_3PO_4, MgCl_2,K_2SO_{
Answer» which one of the following is most effective for coagulation of positively chareged colloid? K_3PO_4, MgCl_2,K_2SO_{

Discussion

45.	41. What is Zeise's salt, Ferrocene and Dibenzene chromium? Explain the structure of these.
Answer» 41. What is Zeise's salt, Ferrocene and Dibenzene chromium? Explain the structure of these.

Discussion

46.	Why are halogens strong oxidising agents?
Answer» Why are halogens strong oxidising agents?

Discussion

47.	9. Which of the following pathways produces 2-hexanone? (i) 1-Hexyne is treated with Hg2+/dil. H2SO4. (ii) 3-Methylhept-2-ene is treated with O3 followed by hydrolysis. (iii) n-butyl magnesium bromide reacts with acetaldehyde followed by hydrolysis and then oxidation with chromic acid. (iv) Hydroboration-oxidation of 1-hexyne.
Answer» 9. Which of the following pathways produces 2-hexanone? (i) 1-Hexyne is treated with Hg2+/dil. H2SO4. (ii) 3-Methylhept-2-ene is treated with O3 followed by hydrolysis. (iii) n-butyl magnesium bromide reacts with acetaldehyde followed by hydrolysis and then oxidation with chromic acid. (iv) Hydroboration-oxidation of 1-hexyne.

Discussion

48.	how to prove H2 is more stable compared to compared to B2
Answer» how to prove H2 is more stable compared to compared to B2

Discussion

49.	Zinc sulphide is crystalline solid:
Answer» Zinc sulphide is crystalline solid:

Discussion

50.	The structure of X is:
Answer» The structure of $X$ is:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Silicon dioxide ,made of elements silicon and oxygen contains 46.7% by mass of silicon.With what mass of oxygen will 10 g of silicon combine?

The alkali metals form salt-like hydrides by the direct synthesis at elevated temperature. The thermal stability of these hydrides decreases in which of the following orders?

29 electrons are removed from Zn atom (Z=30) by certain means. The minimum energy needed to remove the 30th electron will be-

which of the following molecule is polar1] PF3Cl2 2] PCl5 3] PCl3F2 4] XeF4

The ionic radii (in A∘) of N3−, O2− and F− are respectively:

1. Blue litmus paper is dipped in a solution. It remains blue. What is the nature of the solution? Explain. 2. Factory waste is neutralised before disposing it into the water bodies. Why?

2 Inert pair effect represents the electrons of the valence electrons to be available for bonding as compared to the valence electrons "&quotdue to their greater penetration in the nucleus""

47. How many electrons present in 10g CH4?

The correct order of first ionization energy is(1) Fe >Co > Ni(3) Co > Fe > No52.Ni>Co > Fe(4) Ni> Fe> Co

Buckminsterfullerene (C60) contains how many five membered rings?

If R is the radius of the octahedral voids and 'r' is the radius of the atom in close packing, then rR is equal to

83. Dissolving 120 g urea (mol.wt.60) in 1000 g of water gave a solution of density 1.15 g/ml , the molar - ity of the solution is

Which represents theelectronic configuration of the most electropositive element?

Which one among the following is not an analgesics?

Which of the following statements are correct about the reactivities of (I) n -propyl chloride and (II) allyl chloride.

How will recognise that a given reaction taking place in forward and backward direction to be exothermic or exothermic

What are the uses of products obtained from the chlor alkali process?

How many stereoisomers does this molecule have?CH3CH=CHCH2CHBrCH3

74.The ratio of no.of collision per second at the walls of container by He and oxygen gas molecules kept at same volume and temperature will be(assume normal incidence on walls)

Depression in freezing point of 0.01 moll aqueous HCOOH solution is 0.02046. 1 molal aqueous urea solution freezes at - 1.86 ^°C, assuming molality equal to molarity, pH oh HCOOH solution is

During the adsorption of Krypton on activated charcoal at low temperature, which of the following is true?

The correct order of decreasing second ionisation enthalpy of Ti(22), V(23), Cr(24) and Mn(25) is [CBSE AIPMT 2008]

84 Is nitrogen trichloride polar or nonpolar.Why?

70. Can 3-butanolide be named as 3-methyl-2-oxacyclobutanone.Why/Whynot?

How to solve the limit problem in easy and simple way ??

Which has higher b. p. Ortho hydrogen or para hydrogen?

25. Calculate the pH of 0.625M solution of CH3COOH is (ka for CH3COOH is 1.754 into 10 to the power minus 5) A)8.25. B)9.28 C )10.2. D) 11.26

2.38g uranium was heated strongly in a current of air. the resulting oxide weighted 2.806 g. determine the empirical formula of the oxide? A) U4O8 B) U3O8 C) U9O5 D) U1O9

What percent of a sample of nitrogen must be allowed to escaped if its temperature ,preesure and volume are to be changed from 220 degree c ,3atm,1.00litre respectively?

How many of the following is/are the incorrect statement about silicones1.They are made up of Si4−4 units2.They are polymers made up of R2SiO units3.They are water soluble compounds. 4.They are hydrophilic in nature

when nh4oh is added dropwise and dilute solution of fecl3 then how feoh3 is negative ? Does fe ion not surround the colloid as it is in more conc. because it is in medium ?

CH3CH2CH2OH and CH3CH2OCH3 are:

What is the coordination number in a square close-packed structure in two dimensions? (a) 2 (b) 3 (c) 4 (d) 6

What will be the oder of reactivity of the following carbonyl compound with Grignard's reagent?

In the above reactions, the possible amines produced as A and B, are respectively:

Depression in freezing point for 1M nacl

a mixture contains 1 moles of monoatomic gas and 2 moles of diatomic gas . then what is the value of γ.

State differences between acids and bases.

Which of the following is the strongest oxidant:

7.5 grams of a gas occupy 5.8 litres of volume at STP the gas is

ntTwo components in the ratio of x : y form an azeotropic mixture. They are mixed in the ratio of x : 2y, how many moles one of the pure component y will be evaporated before getting azeotropic solution?n

The total number of neutrons in dipositive zinc ions with mass number 70 is

which one of the following is most effective for coagulation of positively chareged colloid? K_3PO_4, MgCl_2,K_2SO_{

41. What is Zeise's salt, Ferrocene and Dibenzene chromium? Explain the structure of these.

Why are halogens strong oxidising agents?

how to prove H2 is more stable compared to compared to B2

Zinc sulphide is crystalline solid:

The structure of X is: