46295 + Interview Questions in Chemistry

1.	[X]+H2SO4→[Y] a colourless gas with irritating smell [Y]+K2Cr2O7+H2SO4→ Green solution. [X] and [Y] are
Answer» $[X] + H_{2} S O_{4} \to [Y]$ a colourless gas with irritating smell $[Y] + K_{2} C r_{2} O_{7} + H_{2} S O_{4} \to$ Green solution. [X] and [Y] are

Discussion

2.	Metal Deficiency Defect is observed due to:
Answer» Metal Deficiency Defect is observed due to:

Discussion

3.	A solution has 0.1 M in each KCl, KBr and K2CrO4 and to this solution solid AgNO3 is gradually added. Assume there is no change in the volume of the solution given: Ksp(AgCl)=1.7×10−10 Ksp(AgBr)=5.0×10−13 and Ksp(K2CrO4)=1.9×10−12 The concentration of [Ag+] required to start the precipitation of AgBr is:
Answer» A solution has 0.1 M in each KCl, KBr and $K_{2} C r O_{4}$ and to this solution solid $A g N O_{3}$ is gradually added. Assume there is no change in the volume of the solution given: $K s p (A g C l) = 1.7 \times 10^{- 10}$ $K s p (A g B r) = 5.0 \times 10^{- 13} a n d K s p (K_{2} C r O_{4}) = 1.9 \times 10^{- 12}$ The concentration of $[A g^{+}]$ required to start the precipitation of AgBr is:

Discussion

4.	Among the following ion pπ−dπ overlap could be present in
Answer» Among the following ion $p π - d π$ overlap could be present in

Discussion

5.	Which of the following is TRUE for alkenes?
Answer» Which of the following is TRUE for alkenes?

Discussion

6.	What is the original Calgon made of?
Answer» What is the original Calgon made of?

Discussion

7.	Which of the following exhibits linkage isomerism?
Answer» Which of the following exhibits linkage isomerism?

Discussion

8.	[BHU 1995]
Answer» [BHU 1995]

8.

[BHU 1995]

Answer»

[BHU 1995]

Discussion

9.	Which of the following is used as antioxidant in rubber industry
Answer» Which of the following is used as antioxidant in rubber industry

Discussion

10.	18 g glucose (C6H12O6) is added to 178.2 g water. The vapor presure of water (in torr) for this aqueous solution is:
Answer» 18 g glucose $(C_{6} H_{12} O_{6})$ is added to 178.2 g water. The vapor presure of water (in torr) for this aqueous solution is:

Discussion

11.	Oxygen is present in a 1 litre flask at a pressure of 7.6×10−10 mm Hg. Calculate the number of oxygen molecular in the flask at 0∘C.A. 2.7×1010B.4.7×1010C.2.7×1023D. 5×1037
Answer» Oxygen is present in a 1 litre flask at a pressure of $7.6 \times 10^{- 10}$ mm Hg. Calculate the number of oxygen molecular in the flask at $0^{\circ} C$ . A. $2.7 \times 10^{10}$ B. $4.7 \times 10^{10}$ C. $2.7 \times 10^{23}$ D. $5 \times 10^{37}$

Discussion

12.	What amount of dioxygen (in gram) contains 1.8×1022 molecules?
Answer» What amount of dioxygen (in gram) contains $1.8 \times 10^{22}$ molecules?

Discussion

13.	Which pair from the following will not form an ideal solution
Answer» Which pair from the following will not form an ideal solution

13.

Which pair from the following will not form an ideal solution

Answer»

Which pair from the following will not form an ideal solution

Discussion

14.	Solubility of the alkaline earth metal sulphates in water decreases in the sequence :
Answer» Solubility of the alkaline earth metal sulphates in water decreases in the sequence :

Discussion

15.	Among the following alcohols, which produces halides easily with conc. HCl and anhy. ZnCl2
Answer» Among the following alcohols, which produces halides easily with conc. HCl and anhy. $Z n C l_{2}$

Discussion

16.	Arrange the following in increasing order of degree of hydrolysis.
Answer» Arrange the following in increasing order of degree of hydrolysis.

16.

Arrange the following in increasing order of degree of hydrolysis.

Answer»

Arrange the following in increasing order of degree of hydrolysis.

Discussion

17.	How Does basic character of the oxides down the group in alkali metals change . Give reason
Answer» How Does basic character of the oxides down the group in alkali metals change . Give reason

Discussion

18.	A solid organic compound x, on heating directly converted into vapour phase which on cooling solidifies. The best method for purifying 'x' is
Answer» A solid organic compound x, on heating directly converted into vapour phase which on cooling solidifies. The best method for purifying 'x' is

Discussion

19.	The compounds (G) and (H), respectively, are ;
Answer» The compounds (G) and (H), respectively, are ;

Discussion

20.	The only correct combination for SN2 reaction.
Answer» The only correct combination for $S_{N} 2$ reaction.

Discussion

21.	C6H5NO2Sn,HCl−−−−→XNaNO2,HCl−−−−−−−−→YH3PO2−−−−→Z The final product of the above sequence is
Answer» $C_{6} H_{5} N O_{2} S n, H C l - --- \to X N a N O_{2}, H C l - ------- \to Y H_{3} P O_{2} - --- \to Z$ The final product of the above sequence is

21.

C6H5NO2Sn,HCl−−−−→XNaNO2,HCl−−−−−−−−→YH3PO2−−−−→Z The final product of the above sequence is

Answer»

$C_{6} H_{5} N O_{2} S n, H C l - --- \to X N a N O_{2}, H C l - ------- \to Y H_{3} P O_{2} - --- \to Z$

The final product of the above sequence is

Discussion

22.	What is the mole fraction of the solute in a 1.00 m aqueous solution ?
Answer» What is the mole fraction of the solute in a 1.00 m aqueous solution ?

Discussion

23.	The gram formula mass of ZnSO4 is g. (Given molar mass of Zn in 65 g/mol)
Answer» The gram formula mass of $Z n S O_{4}$ is g. (Given molar mass of $Z n$ in 65 g/mol)

Discussion

24.	Which of the following compounds are meso?
Answer» Which of the following compounds are meso?

Discussion

25.	In a potentiometer circuit, two wires of same material of resistivity , ρ one of radius of cross-section a and other of radius of cross-section 2a are joined in series. They are of length l and 2l respectively. This combination act as potentiometer wire of length 3l. The emf of the cell in primary circuit is E and internal resistance is ρl2πa2. This cell is connected to the potentiometer wire by a conducting wire of negligible resistance with positive terminal of the cell connected to one end (call it A) of longer wire. The balanced length measured from point A obtained in measurement of emf of cell of emf E2 is
Answer» In a potentiometer circuit, two wires of same material of resistivity , $ρ$ one of radius of cross-section a and other of radius of cross-section 2a are joined in series. They are of length l and 2l respectively. This combination act as potentiometer wire of length 3l. The emf of the cell in primary circuit is E and internal resistance is $\frac{ρ l}{2 π a^{2}}$ . This cell is connected to the potentiometer wire by a conducting wire of negligible resistance with positive terminal of the cell connected to one end (call it A) of longer wire. The balanced length measured from point A obtained in measurement of emf of cell of emf $\frac{E}{2}$ is

Discussion

26.	One gram mol of a diatomic gas (γ=1.4) is compressed adiabatically and reversibly so that its temperature rises from 27oC to 127oC. The work done (in joules )will be
Answer» One gram mol of a diatomic gas $(γ = 1.4)$ is compressed adiabatically and reversibly so that its temperature rises from $27^{o} C$ to $127^{o} C .$ The work done (in joules )will be

Discussion

27.	A student performs an experiment to observe photoelectric effect by shining light on a metal surface. The light source limits light of wavelength 450nm. The table given below lists the available metals and their corresponding work functions Metalϕ(ev)Tungsten4.5Lithium2.3Barium2.5Tantalum4.2 Which of the above metals can be used to produce electrons by the photoelectric effect from the given source of light?
Answer» A student performs an experiment to observe photoelectric effect by shining light on a metal surface. The light source limits light of wavelength 450nm. The table given below lists the available metals and their corresponding work functions $\begin{matrix} M e t a l & ϕ (e v) T u n g s t e n & 4.5 L i t h i u m & 2.3 B a r i u m & 2.5 T a n t a l u m & 4.2 \end{matrix}$ Which of the above metals can be used to produce electrons by the photoelectric effect from the given source of light?

27.

A student performs an experiment to observe photoelectric effect by shining light on a metal surface. The light source limits light of wavelength 450nm. The table given below lists the available metals and their corresponding work functions Metalϕ(ev)Tungsten4.5Lithium2.3Barium2.5Tantalum4.2 Which of the above metals can be used to produce electrons by the photoelectric effect from the given source of light?

Answer»

A student performs an experiment to observe photoelectric effect by shining light on a metal surface. The light source limits light of wavelength 450nm. The table given below lists the available metals and their corresponding work functions
$\begin{matrix} M e t a l & ϕ (e v) T u n g s t e n & 4.5 L i t h i u m & 2.3 B a r i u m & 2.5 T a n t a l u m & 4.2 \end{matrix}$

Which of the above metals can be used to produce electrons by the photoelectric effect from the given source of light?

Discussion

28.	Carbon and hydroben in an organic compound are detected as _______
Answer» Carbon and hydroben in an organic compound are detected as _______

Discussion

29.	Which of the following is/are correct representation(s) for 2,3-dimethylpentane?
Answer» Which of the following is/are correct representation(s) for 2,3-dimethylpentane?

Discussion

30.	How many of the following ten compounds will decolourize Bayer's reagent as well as Br2 water.
Answer» How many of the following ten compounds will decolourize Bayer's reagent as well as $B r_{2}$ water.

Discussion

31.	Why dilution favours ionization?
Answer» Why dilution favours ionization?

Discussion

32.	The density of a substance is 2.7gcm3. Find the mass of a block of the substance of volume 100cm3.
Answer» The density of a substance is $2.7 g c m^{3}$ . Find the mass of a block of the substance of volume $100 c m^{3}$ .

Discussion

33.	Read the following and select one the correct answer: Statement I: Alkali metals dissolve in liquid ammonia to give a blue solution Statement II: Alkali metals dissolve in liquid ammonia to give solvated species of the type [M(NH3)n]+
Answer» Read the following and select one the correct answer: Statement I: Alkali metals dissolve in liquid ammonia to give a blue solution Statement II: Alkali metals dissolve in liquid ammonia to give solvated species of the type $[M (N H_{3})_{n}]^{+}$

33.

Read the following and select one the correct answer: Statement I: Alkali metals dissolve in liquid ammonia to give a blue solution Statement II: Alkali metals dissolve in liquid ammonia to give solvated species of the type [M(NH3)n]+

Answer»

Read the following and select one the correct answer:

Statement I: Alkali metals dissolve in liquid ammonia to give a blue solution

Statement II: Alkali metals dissolve in liquid ammonia to give solvated species of the type $[M (N H_{3})_{n}]^{+}$

Discussion

34.	What is Gatarman-Coch Gatarman's reaction?
Answer» What is Gatarman-Coch Gatarman's reaction?

Discussion

35.	Borax bead test is given by :
Answer» Borax bead test is given by :

Discussion

36.	The resultant dipole moment of water is 1.85 D, Calculate the bond moment of OH bond (in D), bond angle in water molecule is 104o C. Given: cos 104o = -0.25 (Ignore the dipole moment due to lone pair)
Answer» The resultant dipole moment of water is 1.85 D, Calculate the bond moment of $O H$ bond (in D), bond angle in water molecule is $104^{o}$ C. Given: cos $104^{o}$ = -0.25 (Ignore the dipole moment due to lone pair)

Discussion

37.	A number of little droplets of water, each of radius 0.1 mm, coalesce to form a single drop of radius 1 mm. Assume the surface tension of water T=0.07N/m and the mechanical equivalent of heat J=4.2 J/cal. The change in temperature is (answer upto two decimal places)
Answer» A number of little droplets of water, each of radius 0.1 mm, coalesce to form a single drop of radius 1 mm. Assume the surface tension of water $T = 0.07 N / m$ and the mechanical equivalent of heat J $= 4.2 J / c a l$ . The change in temperature is (answer upto two decimal places)

Discussion

38.	Which of the following is used in photoelectric cells?
Answer» Which of the following is used in photoelectric cells?

Discussion

39.	CyclohexeneH2−→NiCyclohexane ; ΔH=−28.6 kcal/mol AnthraceneH2−→NiTetradecahydroanthracene ; ΔH=−116.2 kcal/mol The resonance energy of anthracene is x kcal/mol. Magnitude of x is:
Answer» $Cyclohexene H_{2} - \to N i Cyclohexane; Δ H = - 28.6 kcal/mol$ $Anthracene H_{2} - \to N i Tetradecahydroanthracene; Δ H = - 116.2 kcal/mol$ The resonance energy of anthracene is $x kcal/mol$ . Magnitude of $x$ is:

Discussion

40.	What is meaning of Non directional bond in simple terms?
Answer» What is meaning of Non directional bond in simple terms?

Discussion

41.	In a face centered cubic lattice, atom A occupies the corner positions and atom B occupies the face centered positions. If one atom of B is missing from one of the face centered points, the formula of the compound is
Answer» In a face centered cubic lattice, atom A occupies the corner positions and atom B occupies the face centered positions. If one atom of B is missing from one of the face centered points, the formula of the compound is

Discussion

42.	Regarding the solubility of gas which of the following is/are incorrect ?
Answer» Regarding the solubility of gas which of the following is/are incorrect ?

Discussion

43.	Of the following, the one with the largest size is?
Answer» Of the following, the one with the largest size is?

Discussion

44.	A gaseous oxide contains 30.4% of nitrogen, one molecule of which contains one nitrogen atom. The density of the oxide relative to oxygen is
Answer» A gaseous oxide contains 30.4% of nitrogen, one molecule of which contains one nitrogen atom. The density of the oxide relative to oxygen is

Discussion

45.	The density of oxygen is 1.43 g L−1 at STP. The density of oxygen at 17∘C and 800 torr is:
Answer» The density of oxygen is $1.43 g L^{- 1}$ at STP. The density of oxygen at $17^{\circ} C$ and $800 t o r r$ is:

Discussion

46.	Consider the elements: Cs, Ne, I and F Identify the element that exihibits only negative oxidation state. Identidy the elements that exihibits only positive oxidation state. Identify the element that exhibits both positive and negative oxidation states. Identify the element which exihibits neither the negative nor does the positive oxidation state
Answer» Consider the elements: Cs, Ne, I and F Identify the element that exihibits only negative oxidation state. Identidy the elements that exihibits only positive oxidation state. Identify the element that exhibits both positive and negative oxidation states. Identify the element which exihibits neither the negative nor does the positive oxidation state

46.

Consider the elements: Cs, Ne, I and F Identify the element that exihibits only negative oxidation state. Identidy the elements that exihibits only positive oxidation state. Identify the element that exhibits both positive and negative oxidation states. Identify the element which exihibits neither the negative nor does the positive oxidation state

Answer»

Consider the elements:
Cs, Ne, I and F
Identify the element that exihibits only negative oxidation state.

Identidy the elements that exihibits only positive oxidation state.

Identify the element that exhibits both positive and negative oxidation states.

Identify the element which exihibits neither the negative nor does the positive oxidation state

Discussion

47.	If Δ0<P, the correct electronic configuration for d4 system will be -
Answer» If $Δ_{0} < P$ , the correct electronic configuration for $d^{4}$ system will be -

Discussion

48.	What is the number of Au atoms in 300 mili gram of gold of 20 carat gold where pure gold is 24 carat.
Answer» What is the number of Au atoms in 300 mili gram of gold of 20 carat gold where pure gold is 24 carat.

Discussion

49.	The nuclei of a radioactive element is produced at constant rate α and they decay with decay constant λ. At t=0, number of nuclei is zero, then the number of nuclei at time t is
Answer» The nuclei of a radioactive element is produced at constant rate $α$ and they decay with decay constant $λ$ . At $t = 0$ , number of nuclei is zero, then the number of nuclei at time $t$ is

Discussion

50.	How to find the number of unpaired electrons in a particular atom
Answer» How to find the number of unpaired electrons in a particular atom

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

[X]+H2SO4→[Y] a colourless gas with irritating smell [Y]+K2Cr2O7+H2SO4→ Green solution. [X] and [Y] are

Metal Deficiency Defect is observed due to:

Among the following ion pπ−dπ overlap could be present in

Which of the following is TRUE for alkenes?

What is the original Calgon made of?

Which of the following exhibits linkage isomerism?

[BHU 1995]

Which of the following is used as antioxidant in rubber industry

18 g glucose (C6H12O6) is added to 178.2 g water. The vapor presure of water (in torr) for this aqueous solution is:

Oxygen is present in a 1 litre flask at a pressure of 7.6×10−10 mm Hg. Calculate the number of oxygen molecular in the flask at 0∘C.A. 2.7×1010B.4.7×1010C.2.7×1023D. 5×1037

What amount of dioxygen (in gram) contains 1.8×1022 molecules?

Which pair from the following will not form an ideal solution

Solubility of the alkaline earth metal sulphates in water decreases in the sequence :

Among the following alcohols, which produces halides easily with conc. HCl and anhy. ZnCl2

Arrange the following in increasing order of degree of hydrolysis.

How Does basic character of the oxides down the group in alkali metals change . Give reason

A solid organic compound x, on heating directly converted into vapour phase which on cooling solidifies. The best method for purifying 'x' is

The compounds (G) and (H), respectively, are ;

The only correct combination for SN2 reaction.

C6H5NO2Sn,HCl−−−−→XNaNO2,HCl−−−−−−−−→YH3PO2−−−−→Z The final product of the above sequence is

What is the mole fraction of the solute in a 1.00 m aqueous solution ?

The gram formula mass of ZnSO4 is g. (Given molar mass of Zn in 65 g/mol)

Which of the following compounds are meso?

One gram mol of a diatomic gas (γ=1.4) is compressed adiabatically and reversibly so that its temperature rises from 27oC to 127oC. The work done (in joules )will be

Carbon and hydroben in an organic compound are detected as _______

Which of the following is/are correct representation(s) for 2,3-dimethylpentane?

How many of the following ten compounds will decolourize Bayer's reagent as well as Br2 water.

Why dilution favours ionization?

The density of a substance is 2.7gcm3. Find the mass of a block of the substance of volume 100cm3.

Read the following and select one the correct answer: Statement I: Alkali metals dissolve in liquid ammonia to give a blue solution Statement II: Alkali metals dissolve in liquid ammonia to give solvated species of the type [M(NH3)n]+

What is Gatarman-Coch Gatarman's reaction?

Borax bead test is given by :

The resultant dipole moment of water is 1.85 D, Calculate the bond moment of OH bond (in D), bond angle in water molecule is 104o C. Given: cos 104o = -0.25 (Ignore the dipole moment due to lone pair)

A number of little droplets of water, each of radius 0.1 mm, coalesce to form a single drop of radius 1 mm. Assume the surface tension of water T=0.07N/m and the mechanical equivalent of heat J=4.2 J/cal. The change in temperature is (answer upto two decimal places)

Which of the following is used in photoelectric cells?

CyclohexeneH2−→NiCyclohexane ; ΔH=−28.6 kcal/mol AnthraceneH2−→NiTetradecahydroanthracene ; ΔH=−116.2 kcal/mol The resonance energy of anthracene is x kcal/mol. Magnitude of x is:

What is meaning of Non directional bond in simple terms?

In a face centered cubic lattice, atom A occupies the corner positions and atom B occupies the face centered positions. If one atom of B is missing from one of the face centered points, the formula of the compound is

Regarding the solubility of gas which of the following is/are incorrect ?

Of the following, the one with the largest size is?

A gaseous oxide contains 30.4% of nitrogen, one molecule of which contains one nitrogen atom. The density of the oxide relative to oxygen is

The density of oxygen is 1.43 g L−1 at STP. The density of oxygen at 17∘C and 800 torr is:

If Δ0&lt;P, the correct electronic configuration for d4 system will be -

What is the number of Au atoms in 300 mili gram of gold of 20 carat gold where pure gold is 24 carat.

The nuclei of a radioactive element is produced at constant rate α and they decay with decay constant λ. At t=0, number of nuclei is zero, then the number of nuclei at time t is

How to find the number of unpaired electrons in a particular atom

If Δ0<P, the correct electronic configuration for d4 system will be -