46295 + Interview Questions in Chemistry

1.	Copper(l) is diamagnetic where as copper (ll) is paramagnetic. Why?
Answer» Copper(l) is diamagnetic where as copper (ll) is paramagnetic. Why?

Discussion

2.	What is hypervalent molecule?
Answer» What is hypervalent molecule?

Discussion

3.	Arrange the following in increasing order of boiling points: (CH3)3N,C2H5OH and C2H5NH2
Answer» Arrange the following in increasing order of boiling points: $(C H_{3})_{3} N, C_{2} H_{5} O H$ and $C_{2} H_{5} N H_{2}$

Discussion

4.	The wavelength of the third line of the Balmer series for a hydrogen atom is -
Answer» The wavelength of the third line of the Balmer series for a hydrogen atom is -

Discussion

5.	Correct order for basic strength is:
Answer» Correct order for basic strength is:

Discussion

6.	The rate of a reaction quadruples when the temperature changes from 293 K to 313 K. Calculate the energy of activation of the reaction assuming that it does not change with temperature.
Answer» The rate of a reaction quadruples when the temperature changes from 293 K to 313 K. Calculate the energy of activation of the reaction assuming that it does not change with temperature.

Discussion

7.	Me−C≡C−MeNa/NH3(liq.)−−−−−−−−→EtOH,−33∘CX=dil.alkaline KMnO4−−−−−−−−−−−−→ Product(s) The product(s) from the above reaction will be
Answer» $M e - C \equiv C - M e N a / N H_{3} (l i q .) - ------- \to E t O H, - 33^{\circ} C X = d i l . a l k a l i n e K M n O_{4} - ----------- \to$ Product(s) The product(s) from the above reaction will be

Discussion

8.	The compound which can show SN2 reaction during solvolysis is:
Answer» The compound which can show $S_{N} 2$ reaction during solvolysis is:

Discussion

9.	Which of the following is disproportionation reaction?
Answer» Which of the following is disproportionation reaction?

Discussion

10.	Among Ne and O which one has a higher radius?
Answer» Among Ne and O which one has a higher radius?

Discussion

11.	The molar heat of formation of NH4 NO3(s) is −367.5KJ and those of N2O(g) and H2O(l) are +81.46KJ and −285.78KJ respectively at 25o C and 1 atmospheric pressure. The △ U for the reaction NH4NO3(s)→N2O(g) + 2H2O(l)
Answer» The molar heat of formation of $N H_{4} N O_{3} (s)$ is $- 367.5 K J$ and those of $N_{2} O (g)$ and $H_{2} O (l)$ are $+ 81.46 K J$ and $- 285.78 K J$ respectively at $25^{o} C$ and 1 atmospheric pressure. The $△$ U for the reaction $N H_{4} N O_{3} (s) \to N_{2} O (g) + 2 H_{2} O (l)$

Discussion

12.	Acidulated water is electrolysed by 1A current for 16 minutes and 5 seconds using inert electrodes. The volume of gases liberated at STP will be :
Answer» Acidulated water is electrolysed by 1A current for 16 minutes and 5 seconds using inert electrodes. The volume of gases liberated at STP will be :

Discussion

13.	Which of the following statements is incorrect about soaps and detergents?
Answer» Which of the following statements is incorrect about soaps and detergents?

Discussion

14.	In which of the following the central atom does not use sp3 hybrid orbitals in its bonding
Answer» In which of the following the central atom does not use $s p^{3}$ hybrid orbitals in its bonding

Discussion

15.	Number of carbon atoms present in citric acid, oxaloacetic acid and pyruvic acid are respectively .
Answer» Number of carbon atoms present in citric acid, oxaloacetic acid and pyruvic acid are respectively .

Discussion

16.	Which of the following is not reduced to corresponding 1∘ alcohol by LiAlH4?
Answer» Which of the following is not reduced to corresponding $1^{\circ}$ alcohol by $L i A l H_{4}$ ?

Discussion

17.	A hypothetical reaction : A(g)+B(g)⇌C(g)+D(g) occurs in a single step, the specific rate constant of forward reaction at TK is 2.0×10−3mol−1L s−1. When start is made with equimolar amounts of A and B, it is found that the concentration of A is twice that of C at equilibrium. The specific rate constant of the backward reaction is ?
Answer» A hypothetical reaction : $A_{(g)} + B_{(g)} ⇌ C_{(g)} + D_{(g)}$ occurs in a single step, the specific rate constant of forward reaction at TK is $2.0 \times 10^{- 3} m o l^{- 1} L s^{- 1}$ . When start is made with equimolar amounts of A and B, it is found that the concentration of A is twice that of C at equilibrium. The specific rate constant of the backward reaction is ?

Discussion

18.	What do you understand by the terms: (A). hydrogen economy (B). Hydrogenation (C). Syngas (D). water-gas shift reaction (E). fuel-cell
Answer» What do you understand by the terms: (A). hydrogen economy (B). Hydrogenation (C). Syngas (D). water-gas shift reaction (E). fuel-cell

18.

What do you understand by the terms: (A). hydrogen economy (B). Hydrogenation (C). Syngas (D). water-gas shift reaction (E). fuel-cell

Answer»

What do you understand by the terms:
(A). hydrogen economy

(B). Hydrogenation

(C). Syngas

(D). water-gas shift reaction

(E). fuel-cell

Discussion

19.	Which of the following is Glauber’s salt:
Answer» Which of the following is Glauber’s salt:

Discussion

20.	On Pauling’s electronegativity scale, which element is next to F?
Answer» On Pauling’s electronegativity scale, which element is next to $F ?$

Discussion

21.	Does every physical quantity has a unit?
Answer» Does every physical quantity has a unit?

Discussion

22.	The vapour pressure of benzene at a certain temperature is 640mm of Hg. A non volatile and non electrolyte solid weighing 2.175 g is added to 39.08 g of benzene. The vapour pressure of the solution is 600mm of Hg. What is the molecular mass of the solid substance?
Answer» The vapour pressure of benzene at a certain temperature is 640mm of Hg. A non volatile and non electrolyte solid weighing 2.175 g is added to 39.08 g of benzene. The vapour pressure of the solution is 600mm of Hg. What is the molecular mass of the solid substance?

Discussion

23.	What dodo it mean by stoichiometric hydrides
Answer» What dodo it mean by stoichiometric hydrides

Discussion

24.	The boiling point of benzene is 353.23 K. When 1.80 g of a non-volatile solute was dissolved in 90 g benzene, the boiling point is raised to 354.11 K. Calculate the molar mass of the solute. (Kb for benzene is 2.53Kkgmol−1)
Answer» The boiling point of benzene is 353.23 K. When 1.80 g of a non-volatile solute was dissolved in 90 g benzene, the boiling point is raised to 354.11 K. Calculate the molar mass of the solute. $(K_{b} f o r b e n z e n e i s 2.53 K k g m o l^{- 1})$

Discussion

25.	If we consider 1 and 2 as priority, then which of the following is Z?
Answer» If we consider 1 and 2 as priority, then which of the following is Z?

Discussion

26.	Ce-58 is a member of
Answer» Ce-58 is a member of

Discussion

27.	Acetylene has 'garlic odour' due to
Answer» Acetylene has 'garlic odour' due to

Discussion

28.	H2SO4 has higher viscosity than water. Reason being _____
Answer» $H_{2} S O_{4}$ has higher viscosity than water. Reason being _____

Discussion

29.	Which is more ionic NaCl or MgO? and Why?
Answer» Which is more ionic NaCl or MgO? and Why?

Discussion

30.	Why dont acids have lone pair around the central atom?
Answer» Why dont acids have lone pair around the central atom?

Discussion

31.	calculate the number of atoms in C6H12O6
Answer» calculate the number of atoms in C6H12O6

Discussion

32.	Fe2O3,SnO2,PbS,MgCl2,HgS,ZnS,Al2O3,Ag2S,Cu2S Consider given ores and calculate the value of expression (Q+RP×S), where, P = Number of ores from which the metal is commercially extracted by Hydrometallurgy. Q = Number of ores from which the metal is commercially extracted by Self-reduction. R = Number of ores from which the metal is commercially extracted by carbon reduction. S = Number of ores from which metal is commercially extracted by electrolyitc reduction.
Answer» $F e_{2} O_{3}, S n O_{2}, P b S, M g C l_{2}, H g S, Z n S, A l_{2} O_{3}, A g_{2} S, C u_{2} S$ Consider given ores and calculate the value of expression $(\frac{Q + R}{P \times S})$ , where, P = Number of ores from which the metal is commercially extracted by Hydrometallurgy. Q = Number of ores from which the metal is commercially extracted by Self-reduction. R = Number of ores from which the metal is commercially extracted by carbon reduction. S = Number of ores from which metal is commercially extracted by electrolyitc reduction.

Discussion

33.	In Carius method of estimation of halogen 0.15 gram of an organic compound gave 0.12 gram of AgBr . calculate % of bromine in the compound. (Ag=108, Br=80)
Answer» In Carius method of estimation of halogen 0.15 gram of an organic compound gave 0.12 gram of AgBr . calculate % of bromine in the compound. (Ag=108, Br=80)

Discussion

34.	A bottle of sulphuric acid (d=1.787 g/ml) is labelled 86% by mass. What is the molarity of the solution? What volume of the acid is required to make 1L of 0.2M H2SO4?
Answer» A bottle of sulphuric acid (d=1.787 g/ml) is labelled 86% by mass. What is the molarity of the solution? What volume of the acid is required to make 1L of 0.2M H2SO4?

Discussion

35.	The amount of water formed when 2g of Hydrogen gas reacts with 1g of Oxygen gas ?
Answer» The amount of water formed when 2g of Hydrogen gas reacts with 1g of Oxygen gas ?

Discussion

36.	What is voids
Answer» What is voids

Discussion

37.	(a) Write the formula of the following coordination compound : Iron(III) hexacyanoferrate(II) (b) What type of isomerism is exhibited by the complex [Co(NH3)5Cl]SO4? (c) Write the hybridisation and number of unpaired electrons in the complex [CoF6]3−. (Atomic No. of Co = 27)
Answer» (a) Write the formula of the following coordination compound : Iron(III) hexacyanoferrate(II) (b) What type of isomerism is exhibited by the complex $[C o (N H_{3})_{5} C l] S O_{4}$ ? (c) Write the hybridisation and number of unpaired electrons in the complex [ $C o F_{6}]^{3 -}$ . (Atomic No. of Co = 27)

Discussion

38.	Question 24 Which of the following attain the linear structure? (a) BeCl2 (b)NCO+ (c) NO2 (d) CS2
Answer» Question 24 Which of the following attain the linear structure? (a) $B e C l_{2}$ (b) $N C O^{+}$ (c) $N O_{2}$ (d) $C S_{2}$

38.

Question 24 Which of the following attain the linear structure? (a) BeCl2 (b)NCO+ (c) NO2 (d) CS2

Answer»

Question 24

Which of the following attain the linear structure?

(a) $B e C l_{2}$

(b) $N C O^{+}$

(c) $N O_{2}$

(d) $C S_{2}$

Discussion

39.	Complete combustion of ether gives:
Answer» Complete combustion of ether gives:

Discussion

40.	Setting of plaster of paris involves
Answer» Setting of plaster of paris involves

Discussion

41.	Two compounds A and B forms non-volatile compounds having molecular formulae AB2 and AB4. when 1 g of AB2 and 1g of AB4 are separately dissolved in 20 g of Benzene, the B.P. was lowered by 2.3∘C and 1.3∘C respectively. Find the molar mass of A and B. kb of Benzene is S.1 k kg/mol
Answer» Two compounds A and B forms non-volatile compounds having molecular formulae $A B_{2}$ and $A B_{4}$ . when 1 g of $A B_{2}$ and 1g of $A B_{4}$ are separately dissolved in 20 g of Benzene, the B.P. was lowered by ${2.3}^{\circ} C$ and ${1.3}^{\circ} C$ respectively. Find the molar mass of A and B. $k_{b}$ of Benzene is S.1 k kg/mol

Discussion

42.	Which of the following alcohols on oxidation gives a ketone with same number of carbon atoms?
Answer» Which of the following alcohols on oxidation gives a ketone with same number of carbon atoms?

Discussion

43.	Which of the following statement is wrong for the transition elements?
Answer» Which of the following statement is wrong for the transition elements?

Discussion

44.	Magnesium liberates H2 on reaction with
Answer» Magnesium liberates $H_{2}$ on reaction with

Discussion

45.	There is no S-S bond in
Answer» There is no S-S bond in

Discussion

46.	On being warmed with silver powder, chloroform gives:
Answer» On being warmed with silver powder, chloroform gives:

Discussion

47.	The difference of the number of σ-bonds and π-bonds in the product (blue-coloured) formed by the reaction of H2O2 with dichromate in an acidic medium is:.
Answer» The difference of the number of $σ$ -bonds and $π$ -bonds in the product (blue-coloured) formed by the reaction of $H_{2} O_{2}$ with dichromate in an acidic medium is:.

Discussion

48.	When PbO2 reacts with conc. HNO3, the gas evolved is:
Answer» When $P b O_{2}$ reacts with conc. $H N O_{3}$ , the gas evolved is:

Discussion

49.	Anhydrous AlCl3 is used in Friedel – crafts reaction because it is
Answer» Anhydrous $A l C l_{3}$ is used in Friedel – crafts reaction because it is

Discussion

50.	For a gas, the difference between the specific heats at constant pressure and constant volume is 4150 J/Kg-K and the ratio is 1.4. What is the specific heat of the gas at constant volume in J/Kg-K?
Answer» For a gas, the difference between the specific heats at constant pressure and constant volume is 4150 J/Kg-K and the ratio is 1.4. What is the specific heat of the gas at constant volume in J/Kg-K?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Copper(l) is diamagnetic where as copper (ll) is paramagnetic. Why?

What is hypervalent molecule?

Arrange the following in increasing order of boiling points: (CH3)3N,C2H5OH and C2H5NH2

The wavelength of the third line of the Balmer series for a hydrogen atom is -

Correct order for basic strength is:

The rate of a reaction quadruples when the temperature changes from 293 K to 313 K. Calculate the energy of activation of the reaction assuming that it does not change with temperature.

Me−C≡C−MeNa/NH3(liq.)−−−−−−−−→EtOH,−33∘CX=dil.alkaline KMnO4−−−−−−−−−−−−→ Product(s) The product(s) from the above reaction will be

The compound which can show SN2 reaction during solvolysis is:

Which of the following is disproportionation reaction?

Among Ne and O which one has a higher radius?

The molar heat of formation of NH4 NO3(s) is −367.5KJ and those of N2O(g) and H2O(l) are +81.46KJ and −285.78KJ respectively at 25o C and 1 atmospheric pressure. The △ U for the reaction NH4NO3(s)→N2O(g) + 2H2O(l)

Acidulated water is electrolysed by 1A current for 16 minutes and 5 seconds using inert electrodes. The volume of gases liberated at STP will be :

Which of the following statements is incorrect about soaps and detergents?

In which of the following the central atom does not use sp3 hybrid orbitals in its bonding

Number of carbon atoms present in citric acid, oxaloacetic acid and pyruvic acid are respectively .

Which of the following is not reduced to corresponding 1∘ alcohol by LiAlH4?

What do you understand by the terms: (A). hydrogen economy (B). Hydrogenation (C). Syngas (D). water-gas shift reaction (E). fuel-cell

Which of the following is Glauber’s salt:

On Pauling’s electronegativity scale, which element is next to F?

Does every physical quantity has a unit?

The vapour pressure of benzene at a certain temperature is 640mm of Hg. A non volatile and non electrolyte solid weighing 2.175 g is added to 39.08 g of benzene. The vapour pressure of the solution is 600mm of Hg. What is the molecular mass of the solid substance?

What dodo it mean by stoichiometric hydrides

The boiling point of benzene is 353.23 K. When 1.80 g of a non-volatile solute was dissolved in 90 g benzene, the boiling point is raised to 354.11 K. Calculate the molar mass of the solute. (Kb for benzene is 2.53Kkgmol−1)

If we consider 1 and 2 as priority, then which of the following is Z?

Ce-58 is a member of

Acetylene has 'garlic odour' due to

H2SO4 has higher viscosity than water. Reason being _____

Which is more ionic NaCl or MgO? and Why?

Why dont acids have lone pair around the central atom?

calculate the number of atoms in C6H12O6

In Carius method of estimation of halogen 0.15 gram of an organic compound gave 0.12 gram of AgBr . calculate % of bromine in the compound. (Ag=108, Br=80)

A bottle of sulphuric acid (d=1.787 g/ml) is labelled 86% by mass. What is the molarity of the solution? What volume of the acid is required to make 1L of 0.2M H2SO4?

The amount of water formed when 2g of Hydrogen gas reacts with 1g of Oxygen gas ?

What is voids

(a) Write the formula of the following coordination compound : Iron(III) hexacyanoferrate(II) (b) What type of isomerism is exhibited by the complex [Co(NH3)5Cl]SO4? (c) Write the hybridisation and number of unpaired electrons in the complex [CoF6]3−. (Atomic No. of Co = 27)

Question 24 Which of the following attain the linear structure? (a) BeCl2 (b)NCO+ (c) NO2 (d) CS2

Complete combustion of ether gives:

Setting of plaster of paris involves

Two compounds A and B forms non-volatile compounds having molecular formulae AB2 and AB4. when 1 g of AB2 and 1g of AB4 are separately dissolved in 20 g of Benzene, the B.P. was lowered by 2.3∘C and 1.3∘C respectively. Find the molar mass of A and B. kb of Benzene is S.1 k kg/mol

Which of the following alcohols on oxidation gives a ketone with same number of carbon atoms?

Which of the following statement is wrong for the transition elements?

Magnesium liberates H2 on reaction with

There is no S-S bond in

On being warmed with silver powder, chloroform gives:

The difference of the number of σ-bonds and π-bonds in the product (blue-coloured) formed by the reaction of H2O2 with dichromate in an acidic medium is:.

When PbO2 reacts with conc. HNO3, the gas evolved is:

Anhydrous AlCl3 is used in Friedel – crafts reaction because it is

For a gas, the difference between the specific heats at constant pressure and constant volume is 4150 J/Kg-K and the ratio is 1.4. What is the specific heat of the gas at constant volume in J/Kg-K?