46295 + Interview Questions in Chemistry

1.	pi bonds is formed by the overlapping of
Answer» $p i$ bonds is formed by the overlapping of

Discussion

2.	A white paper looks white because it reflects all the colours. Whereas though a mirror reflects all types of light it is not white. Why?
Answer» A white paper looks white because it reflects all the colours. Whereas though a mirror reflects all types of light it is not white. Why?

Discussion

3.	A solution of glucose (C6H12O6) is isotonic with 4 g of urea (H2N−CO−NH2) per litre of solution. The concentration of glucose is:
Answer» A solution of glucose ( $C_{6} H_{12} O_{6}$ ) is isotonic with 4 g of urea $(H_{2} N - C O - N H_{2})$ per litre of solution. The concentration of glucose is:

Discussion

4.	Which of the following compounds will not react with methyl magnesium bromide?
Answer» Which of the following compounds will not react with methyl magnesium bromide?

Discussion

5.	A paramagnetic solid, which might cause explosive reactions with some compounds, is used in rebreathers and such life-support systems to scrub CO2 and to produce O2 is:
Answer» A paramagnetic solid, which might cause explosive reactions with some compounds, is used in rebreathers and such life-support systems to scrub $C O_{2}$ and to produce $O_{2}$ is:

Discussion

6.	Among the following which is the condition favourable for the formation of CH3OH from CO and H2?
Answer» Among the following which is the condition favourable for the formation of $C H_{3} O H$ from $C O$ and $H_{2}$ ?

Discussion

7.	How many of the following process of refining is/are chemical methods. ___ (i) Liquation (ii) Fractional distillation process (iii) Zone refining method (iv) Chromatographic method (v) Cupellation (vi) Poling (vii) Hoopes process (viii) Kroll’s process (ix) Mond’s process
Answer» How many of the following process of refining is/are chemical methods. ___ (i) Liquation (ii) Fractional distillation process (iii) Zone refining method (iv) Chromatographic method (v) Cupellation (vi) Poling (vii) Hoopes process (viii) Kroll’s process (ix) Mond’s process

Discussion

8.	Compound (A) and (B) are:-
Answer» Compound (A) and (B) are:-

Discussion

9.	Which of the following ions will cause hardness in water ?
Answer» Which of the following ions will cause hardness in water ?

Discussion

10.	The major product that is not formed in the above reaction is:
Answer» The major product that is not formed in the above reaction is:

Discussion

11.	0.242 g sample of K is heated in the presence of oxygen gas. This resulted in the formation of 0.440 g of a crystalline compound. What is the formula of this compound?
Answer» 0.242 g sample of K is heated in the presence of oxygen gas. This resulted in the formation of 0.440 g of a crystalline compound. What is the formula of this compound?

Discussion

12.	Equivalent mass of Na2CO3 when titrated with HCl using phenolphthalein indicator will be
Answer» Equivalent mass of Na2CO3 when titrated with HCl using phenolphthalein indicator will be

Discussion

13.	If potassium chlorate is 80% pure,then 48g of oxygen would be produced from a)153.12g of Kclo3. B)122.5g of KCLO3 c) 245g of KCLO3. d) 98.0 g of KCLO3
Answer» If potassium chlorate is 80% pure,then 48g of oxygen would be produced from a)153.12g of Kclo3. B)122.5g of KCLO3 c) 245g of KCLO3. d) 98.0 g of KCLO3

13.

If potassium chlorate is 80% pure,then 48g of oxygen would be produced from a)153.12g of Kclo3. B)122.5g of KCLO3 c) 245g of KCLO3. d) 98.0 g of KCLO3

Answer»

If potassium chlorate is 80% pure,then 48g of oxygen would be produced from

a)153.12g of Kclo3. B)122.5g of KCLO3

c) 245g of KCLO3. d) 98.0 g of KCLO3

Discussion

14.	Aluminium chloride exists as dimer, Al2Cl6 in solid state as well as in solution of non-polar solvent such as benzene. When dissolved in water it gives:
Answer» Aluminium chloride exists as dimer, $A l_{2} C l_{6}$ in solid state as well as in solution of non-polar solvent such as benzene. When dissolved in water it gives:

Discussion

15.	How do the following factors contribute to the environmental crisis in India? What problem do they pose for the government? (i) Rising population (ii) Air pollution (iii) Water contamination (iv) Affluent consumption standards (v) Illiteracy (vi) Industrialisation (vii) Urbanisation (viii) Reduction of forest coverage (ix) Poaching (x) Global warming
Answer» How do the following factors contribute to the environmental crisis in India? What problem do they pose for the government? (i) Rising population (ii) Air pollution (iii) Water contamination (iv) Affluent consumption standards (v) Illiteracy (vi) Industrialisation (vii) Urbanisation (viii) Reduction of forest coverage (ix) Poaching (x) Global warming

15.

How do the following factors contribute to the environmental crisis in India? What problem do they pose for the government? (i) Rising population (ii) Air pollution (iii) Water contamination (iv) Affluent consumption standards (v) Illiteracy (vi) Industrialisation (vii) Urbanisation (viii) Reduction of forest coverage (ix) Poaching (x) Global warming

Answer»

How do the following factors contribute to the environmental crisis in India? What problem do they pose for the government?

(i) Rising population

(ii) Air pollution

(iii) Water contamination

(iv) Affluent consumption standards

(v) Illiteracy

(vi) Industrialisation

(vii) Urbanisation

(viii) Reduction of forest coverage

(ix) Poaching

(x) Global warming

Discussion

16.	Match Column-I with Column-II
Answer» Match Column-I with Column-II

Discussion

17.	For the reaction N2+3X2→2NX3 where X=F,Cl (the average bond energies are F−F=155kJ mol−1,N−F=272kJ mol−1,Cl−Cl kJ mol−1,N−Cl kJ mol−1 and N≡N=941 kJmol−1). The heats of formation of NF3 and NCl3 in kJ mol−1, respectively, are closest to
Answer» For the reaction $N_{2} + 3 X_{2} \to 2 N X_{3} w h e r e X = F, C l$ (the average bond energies are $F - F = 155 k J m o l^{- 1}, N - F = 272 k J m o l^{- 1}, C l - C l k J m o l^{- 1}, N - C l k J m o l^{- 1} a n d N \equiv N = 941 k J m o l^{- 1})$ . The heats of formation of $N F_{3} a n d N C l_{3} i n k J m o l^{- 1}$ , respectively, are closest to

Discussion

18.	Which of the following is an electrophilic substitution reaction?
Answer» Which of the following is an electrophilic substitution reaction?

Discussion

19.	If conjugated cyclic Polymers like polyacetylene conduct electricity why does benzene not conduct electricity?
Answer» If conjugated cyclic Polymers like polyacetylene conduct electricity why does benzene not conduct electricity?

Discussion

20.	Which of the following reactions will not give propane?
Answer» Which of the following reactions will not give propane?

Discussion

21.	Why are 13th group elements able to form covalent bond?
Answer» Why are 13th group elements able to form covalent bond?

Discussion

22.	In the following question a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below in each question. Assertion (A) The temperature at which vapour pressure of a liquid is equal to the external pressure is called boiling temperature. Reason (R) At high altitude atmospheric pressure is high. (a) Both A and R are true and R is the correct explanation of A (b) Both A and R are true but R is the correct explanation of A (c) A is true but R is false (d) A is false but R is true.
Answer» In the following question a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below in each question. Assertion (A) The temperature at which vapour pressure of a liquid is equal to the external pressure is called boiling temperature. Reason (R) At high altitude atmospheric pressure is high. (a) Both A and R are true and R is the correct explanation of A (b) Both A and R are true but R is the correct explanation of A (c) A is true but R is false (d) A is false but R is true.

22.

In the following question a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below in each question. Assertion (A) The temperature at which vapour pressure of a liquid is equal to the external pressure is called boiling temperature. Reason (R) At high altitude atmospheric pressure is high. (a) Both A and R are true and R is the correct explanation of A (b) Both A and R are true but R is the correct explanation of A (c) A is true but R is false (d) A is false but R is true.

Answer»

In the following question a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below in each question.

Assertion (A) The temperature at which vapour pressure of a liquid is equal to the external pressure is called boiling temperature.

Reason (R) At high altitude atmospheric pressure is high.

(a) Both A and R are true and R is the correct explanation of A

(b) Both A and R are true but R is the correct explanation of A

(c) A is true but R is false

(d) A is false but R is true.

Discussion

23.	A diatomic gas is heated at constant pressure. If 105 J of heat is given to the gas, find the change in internal energy of the gas.
Answer» A diatomic gas is heated at constant pressure. If 105 J of heat is given to the gas, find the change in internal energy of the gas.

Discussion

24.	The decomposition of a compound A, at temperature T according to the equation 2P(g)→4Q(g)+R(g)+S(l) is the first order reaction. After 30 minutes from the start of decomposition in a closed vessel, the total pressure developed is found to be 160.25 mm of Hg and after a long period of time the total pressure observed to be 220.25 mm of Hg. Calculate the total pressure of the vessel just after 2 hours in mm of Hg, if volume of liquid S is supposed to be negligible. Given : Vapour pressure of S (l) at temperature T = 20.25 mm of Hg.
Answer» The decomposition of a compound A, at temperature T according to the equation $2 P (g) \to 4 Q (g) + R (g) + S (l)$ is the first order reaction. After 30 minutes from the start of decomposition in a closed vessel, the total pressure developed is found to be 160.25 mm of Hg and after a long period of time the total pressure observed to be 220.25 mm of Hg. Calculate the total pressure of the vessel just after 2 hours in mm of Hg, if volume of liquid S is supposed to be negligible. Given : Vapour pressure of S (l) at temperature T = 20.25 mm of Hg.

Discussion

25.	An object having uniform linear mass density is in equilibrium as shown in the diagram. The value of lr is ___
Answer» An object having uniform linear mass density is in equilibrium as shown in the diagram. The value of $\frac{l}{r}$ is ___

Discussion

26.	When 10 g of KHCO3 is heated, 6.31 g of K2CO3 and 1.07 g of H2O are produced. How many grams of CO2 will be produced?
Answer» When $10 g$ of $K H C O_{3}$ is heated, $6.31 g$ of $K_{2} C O_{3}$ and $1.07 g$ of $H_{2} O$ are produced. How many grams of $C O_{2}$ will be produced?

Discussion

27.	The solubility of CaF2 is 2 × 10−4. Its solubilily product KSP is
Answer» The solubility of $C a F_{2}$ is $2 \times 10^{- 4}$ . Its solubilily product $K_{S P}$ is

Discussion

28.	Which among the following is the correct increasing order of basicity?
Answer» Which among the following is the correct increasing order of basicity?

Discussion

29.	When does elimination and substitution happen please explain using OH reacting with 2-bromo pentane?
Answer» When does elimination and substitution happen please explain using OH reacting with 2-bromo pentane?

Discussion

30.	In the graph showing Maxwell, Boltzmann distribution of energy ........ . (a) area under the curve must not change with an increase in temperature (b) area under the curve increases with increase in temperature (c) area under the curve decreases with increase in temperature (d) with an increase in temperature, curve broadens and shifts to the right-hand side
Answer» In the graph showing Maxwell, Boltzmann distribution of energy ........ . (a) area under the curve must not change with an increase in temperature (b) area under the curve increases with increase in temperature (c) area under the curve decreases with increase in temperature (d) with an increase in temperature, curve broadens and shifts to the right-hand side

Discussion

31.	Butter of Tin is:
Answer» Butter of Tin is:

Discussion

32.	In figure shown, the spring constant is k. The mass of the upper block is m and that of the lower back is 3m. The upper block is depressed down from its equilibrium position by a distance δ and released at t = 0. The minimum value of δ for which the lower block loses contact with the ground is
Answer» In figure shown, the spring constant is k. The mass of the upper block is m and that of the lower back is 3m. The upper block is depressed down from its equilibrium position by a distance δ and released at t = 0. The minimum value of δ for which the lower block loses contact with the ground is

32.

In figure shown, the spring constant is k. The mass of the upper block is m and that of the lower back is 3m. The upper block is depressed down from its equilibrium position by a distance δ and released at t = 0. The minimum value of δ for which the lower block loses contact with the ground is

Answer»

In figure shown, the spring constant is k. The mass of the upper block is m and that of the lower back is 3m. The upper block is depressed down from its equilibrium position by a distance δ and released at t = 0.

The minimum value of δ for which the lower block loses contact with the ground is

Discussion

33.	CH3ClKCN⟶AHs⟶B. In this reaction 'B' is
Answer» $C H_{3} C l K C N ⟶ A_{s} B$ . In this reaction 'B' is

Discussion

34.	Complete combustion of benzene produces:
Answer» Complete combustion of benzene produces:

Discussion

35.	Which hononuclear diatomic molecule has the highest bond dissociation enthalpy?
Answer» Which hononuclear diatomic molecule has the highest bond dissociation enthalpy?

Discussion

36.	The electronic configuration [Kr]4d10 represents ____ (Z forSr=38, Sn=50, Te=52, Ag=47)
Answer» The electronic configuration $[K r] 4 d^{10}$ represents ____ ( $Z$ for $S r = 38$ , $S n = 50$ , $T e = 52$ , $A g = 47$ )

Discussion

37.	Which of the following can not be resolved?
Answer» Which of the following can not be resolved?

Discussion

38.	The ratio of close packed atoms to tetrahedral holes in cubic close packing is
Answer» The ratio of close packed atoms to tetrahedral holes in cubic close packing is

Discussion

39.	What is the number of total isomers including stereoisomers that have the formula CoCr(NH3)6Cl6. (All are ionic salts that have Co3+ and Cr3+ as central atoms with octahedral geometry and NH3 and Cl− as ligands)
Answer» What is the number of total isomers including stereoisomers that have the formula $C o C r (N H_{3})_{6} C l_{6}$ . (All are ionic salts that have $C o^{3 +}$ and $C r^{3 +}$ as central atoms with octahedral geometry and $N H_{3}$ and $C l^{-}$ as ligands)

Discussion

40.	In the light reaction, as your video suggests that for the first instance, 2 protons 1NADPH and 1.3ATP are produced by splitting of 1 water molecule. However it is also told that 4 Mg binds with 4molecules of water. So if it is asked for 1 cycle in the exam, do we have to take in the consideration of 4 molecules of water and multiply the result of (2 protons 1NADPH and 1.3ATP) x4 or we have to consider only 1 water molecule per cycle?
Answer» In the light reaction, as your video suggests that for the first instance, 2 protons 1NADPH and 1.3ATP are produced by splitting of 1 water molecule. However it is also told that 4 Mg binds with 4molecules of water. So if it is asked for 1 cycle in the exam, do we have to take in the consideration of 4 molecules of water and multiply the result of (2 protons 1NADPH and 1.3ATP) x4 or we have to consider only 1 water molecule per cycle?

Discussion

41.	Among BeCO3,CaCO3,SrCO3 how many of these compounds are thermally more stable than MgCO3?
Answer» Among $B e C O_{3}, C a C O_{3}, S r C O_{3}$ how many of these compounds are thermally more stable than $M g C O_{3}$ ?

Discussion

42.	Cassiterite is mainly purified by
Answer» Cassiterite is mainly purified by

Discussion

43.	For the reaction A + B ⇋ C + D the equilibrium constant is
Answer» For the reaction A + B $⇋$ C + D the equilibrium constant is

Discussion

44.	From the following, which reaction will give alkene by E2 mechanism?
Answer» From the following, which reaction will give alkene by $E_{2}$ mechanism?

Discussion

45.	Increasing order of electron affinity is
Answer» Increasing order of electron affinity is

Discussion

46.	106 electrons are added to a pith ball. The charge on the pith ball will be.......?
Answer» 10^{6 electrons are added to a pith ball. The charge on the pith ball will be.......?}

Discussion

47.	Match the models of atom to their respective parent scientists.
Answer» Match the models of atom to their respective parent scientists.

Discussion

48.	One mole of a gas is expanded from (1L, 10 atm, 300 K) to (4 L, 5 atm, 300 K) against a constant external pressure of 1 atm. The heat capacity of gas is 50 J/oC.Then the work done during the process is: (Take 1Latm≃100J)
Answer» One mole of a gas is expanded from ( $1 L, 10 a t m, 300 K$ ) to ( $4 L, 5 a t m, 300 K$ ) against a constant external pressure of $1 a t m$ . The heat capacity of gas is $50 J /^{o} C .$ Then the work done during the process is: (Take $1 L a t m ≃ 100 J$ )

Discussion

49.	Using IUPAC norms write the formulae for the following: (a) Sodium dicyanidoaurate (I) (b)Tetraamminechloridonitrito-N-platinum (IV) sulphate
Answer» Using IUPAC norms write the formulae for the following: (a) Sodium dicyanidoaurate (I) (b)Tetraamminechloridonitrito-N-platinum (IV) sulphate

Discussion

50.	Two radioactive materials X1 and X2 have decay constants 10 λ and λ respectively. If initially they have the same number of nuclei, then the ratio of the number of nuclei of X1 to that of X2 will be 1/e after a time 1xλ. The value of x is ___ .
Answer» Two radioactive materials $X_{1}$ and $X_{2}$ have decay constants 10 $λ$ and $λ$ respectively. If initially they have the same number of nuclei, then the ratio of the number of nuclei of $X_{1}$ to that of $X_{2}$ will be 1/e after a time $\frac{1}{x λ}$ . The value of x is ___ .

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

pi bonds is formed by the overlapping of

A white paper looks white because it reflects all the colours. Whereas though a mirror reflects all types of light it is not white. Why?

A solution of glucose (C6H12O6) is isotonic with 4 g of urea (H2N−CO−NH2) per litre of solution. The concentration of glucose is:

Which of the following compounds will not react with methyl magnesium bromide?

A paramagnetic solid, which might cause explosive reactions with some compounds, is used in rebreathers and such life-support systems to scrub CO2 and to produce O2 is:

Among the following which is the condition favourable for the formation of CH3OH from CO and H2?

How many of the following process of refining is/are chemical methods. ___ (i) Liquation (ii) Fractional distillation process (iii) Zone refining method (iv) Chromatographic method (v) Cupellation (vi) Poling (vii) Hoopes process (viii) Kroll’s process (ix) Mond’s process

Compound (A) and (B) are:-

Which of the following ions will cause hardness in water ?

The major product that is not formed in the above reaction is:

0.242 g sample of K is heated in the presence of oxygen gas. This resulted in the formation of 0.440 g of a crystalline compound. What is the formula of this compound?

Equivalent mass of Na2CO3 when titrated with HCl using phenolphthalein indicator will be

If potassium chlorate is 80% pure,then 48g of oxygen would be produced from a)153.12g of Kclo3. B)122.5g of KCLO3 c) 245g of KCLO3. d) 98.0 g of KCLO3

Aluminium chloride exists as dimer, Al2Cl6 in solid state as well as in solution of non-polar solvent such as benzene. When dissolved in water it gives:

Match Column-I with Column-II

For the reaction N2+3X2→2NX3 where X=F,Cl (the average bond energies are F−F=155kJ mol−1,N−F=272kJ mol−1,Cl−Cl kJ mol−1,N−Cl kJ mol−1 and N≡N=941 kJmol−1). The heats of formation of NF3 and NCl3 in kJ mol−1, respectively, are closest to

Which of the following is an electrophilic substitution reaction?

If conjugated cyclic Polymers like polyacetylene conduct electricity why does benzene not conduct electricity?

Which of the following reactions will not give propane?

Why are 13th group elements able to form covalent bond?

A diatomic gas is heated at constant pressure. If 105 J of heat is given to the gas, find the change in internal energy of the gas.

An object having uniform linear mass density is in equilibrium as shown in the diagram. The value of lr is ___

When 10 g of KHCO3 is heated, 6.31 g of K2CO3 and 1.07 g of H2O are produced. How many grams of CO2 will be produced?

The solubility of CaF2 is 2 × 10−4. Its solubilily product KSP is

Which among the following is the correct increasing order of basicity?

When does elimination and substitution happen please explain using OH reacting with 2-bromo pentane?

Butter of Tin is:

In figure shown, the spring constant is k. The mass of the upper block is m and that of the lower back is 3m. The upper block is depressed down from its equilibrium position by a distance δ and released at t = 0. The minimum value of δ for which the lower block loses contact with the ground is

CH3ClKCN⟶AHs⟶B. In this reaction 'B' is

Complete combustion of benzene produces:

Which hononuclear diatomic molecule has the highest bond dissociation enthalpy?

The electronic configuration [Kr]4d10 represents ____ (Z forSr=38, Sn=50, Te=52, Ag=47)

Which of the following can not be resolved?

The ratio of close packed atoms to tetrahedral holes in cubic close packing is

What is the number of total isomers including stereoisomers that have the formula CoCr(NH3)6Cl6. (All are ionic salts that have Co3+ and Cr3+ as central atoms with octahedral geometry and NH3 and Cl− as ligands)

Among BeCO3,CaCO3,SrCO3 how many of these compounds are thermally more stable than MgCO3?

Cassiterite is mainly purified by

For the reaction A + B ⇋ C + D the equilibrium constant is

From the following, which reaction will give alkene by E2 mechanism?

Increasing order of electron affinity is

106 electrons are added to a pith ball. The charge on the pith ball will be.......?

Match the models of atom to their respective parent scientists.

One mole of a gas is expanded from (1L, 10 atm, 300 K) to (4 L, 5 atm, 300 K) against a constant external pressure of 1 atm. The heat capacity of gas is 50 J/oC.Then the work done during the process is: (Take 1Latm≃100J)

Using IUPAC norms write the formulae for the following: (a) Sodium dicyanidoaurate (I) (b)Tetraamminechloridonitrito-N-platinum (IV) sulphate

Two radioactive materials X1 and X2 have decay constants 10 λ and λ respectively. If initially they have the same number of nuclei, then the ratio of the number of nuclei of X1 to that of X2 will be 1/e after a time 1xλ. The value of x is ___ .