46295 + Interview Questions in Chemistry

1.	What is the decreasing order of strengths of the following bases? ⊖OH,NH⊖2,H−C≡C⊖,andCH3−CH⊖2
Answer» What is the decreasing order of strengths of the following bases? $⊖ O H, N H_{2}^{⊖}, H - C \equiv C^{⊖}, a n d C H_{3} - C H_{2}^{⊖}$

Discussion

2.	When equal volume of 2 liquid are mixed the specific gravity of mixture is 7 by 2 when equal masses of the same to liquid mixed the specific gravity is 12 by 7 find the specific gravity of 2 liquid
Answer» When equal volume of 2 liquid are mixed the specific gravity of mixture is 7 by 2 when equal masses of the same to liquid mixed the specific gravity is 12 by 7 find the specific gravity of 2 liquid

Discussion

3.	What is the gas present in the space
Answer» What is the gas present in the space

Discussion

4.	Do double bonds really exist? Why
Answer» Do double bonds really exist? Why

Discussion

5.	Formula for anhydride of deutero sulphuric acid is
Answer» Formula for anhydride of deutero sulphuric acid is

Discussion

6.	Which has no rotation of symmetry
Answer» Which has no rotation of symmetry

Discussion

7.	Assertion (A): Classical smog occurs in cold humid climate and it is acidic as well as reducing in nature. Reason (R): It is a mixture of smoke, fog and sulphur dioxide.
Answer» Assertion (A): Classical smog occurs in cold humid climate and it is acidic as well as reducing in nature. Reason (R): It is a mixture of smoke, fog and sulphur dioxide.

Discussion

8.	Study the given reaction below. 2Pb(NO3)2→2PbO+nA+O2 In the above reaction, what is nA?
Answer» Study the given reaction below. $2 P b (N O_{3})_{2} \to 2 P b O + n A + O_{2}$ In the above reaction, what is $n A$ ?

Discussion

9.	In the crystals of which of the following ionic compounds would you expect maximum distance between centres of cations and anions [CBSE PMT 1998]
Answer» In the crystals of which of the following ionic compounds would you expect maximum distance between centres of cations and anions [CBSE PMT 1998]

9.

In the crystals of which of the following ionic compounds would you expect maximum distance between centres of cations and anions [CBSE PMT 1998]

Answer»

In the crystals of which of the following ionic compounds would you expect maximum distance between centres of cations and anions

[CBSE PMT 1998]

Discussion

10.	What is de- icing agents?How does it work?
Answer» What is de- icing agents?How does it work?

Discussion

11.	The species: H2O,HCO−3,HSO−4 and NH3 can act both as Brönsted acids and bases. For each case give the corresponding conjugate acid and base.
Answer» The species: $H_{2} O, H C O_{3}^{-}, H S O_{4}^{-}$ and $N H_{3}$ can act both as Brönsted acids and bases. For each case give the corresponding conjugate acid and base.

Discussion

12.	What do you understand by activation of adsorbent? How is it achieved?
Answer» What do you understand by activation of adsorbent? How is it achieved?

Discussion

13.	If one litre of water contains 10−5 moles of H+ ions at a certain temperature. Calculate the degree of ionization of water.
Answer» If one litre of water contains $10^{- 5}$ moles of $H^{+}$ ions at a certain temperature. Calculate the degree of ionization of water.

Discussion

14.	What will be the major product when Ph – Ph is mononitrated?
Answer» What will be the major product when Ph – Ph is mononitrated?

Discussion

15.	Consider a system containing one mole of a diatomic gas, contained in a piston. What is the temperature change of the gas, if q=100 J and W=−200 J? (Given Cv=52R, R=8.3 JK−1mol−1 )
Answer» Consider a system containing one mole of a diatomic gas, contained in a piston. What is the temperature change of the gas, if $q = 100 J$ and $W = - 200 J ?$ (Given $C_{v} = \frac{5}{2} R, R = 8.3 J K^{- 1} m o l^{- 1}$ )

Discussion

16.	Which of the following configurations represents atoms of the elements having the highest second ionization energy
Answer» Which of the following configurations represents atoms of the elements having the highest second ionization energy

16.

Which of the following configurations represents atoms of the elements having the highest second ionization energy

Answer»

Which of the following configurations represents atoms of the elements having the highest second ionization energy

Discussion

17.	Question 11 In which of the following substances will hydrogen bond be strongest? (a) HCl (b) H2O (c) HI (d)H2S
Answer» Question 11 In which of the following substances will hydrogen bond be strongest? (a) HCl (b) $H_{2} O$ (c) HI (d) $H_{2} S$

17.

Question 11 In which of the following substances will hydrogen bond be strongest? (a) HCl (b) H2O (c) HI (d)H2S

Answer»

Question 11

In which of the following substances will hydrogen bond be strongest?

(a) HCl

(b) $H_{2} O$

(c) HI

(d) $H_{2} S$

Discussion

18.	The IUPAC name of the compound CH3−CH2−CH\|OCH3−CH2−OH is
Answer» The IUPAC name of the compound $C H_{3} - C H_{2} - C H \| O C H_{3} - C H_{2} - O H$ is

Discussion

19.	The comparison of acidic strengths of two monobasic acids may be done by comparing the hydronium ion concentrations of their aqueous solution of the same molar concentration. The dissociation constants of the acids HA and HB are 4×10−6 and 2.5×10−9 respectively. How many times is HA stronger than HB? Assume that for both the acids, the degree of dissociation at the concentration taken is negligible.
Answer» The comparison of acidic strengths of two monobasic acids may be done by comparing the hydronium ion concentrations of their aqueous solution of the same molar concentration. The dissociation constants of the acids $H A$ and $H B$ are $4 \times 10^{- 6}$ and $2.5 \times 10^{- 9}$ respectively. How many times is $H A$ stronger than $H B$ ? Assume that for both the acids, the degree of dissociation at the concentration taken is negligible.

Discussion

20.	Choose the correct options regarding 'B' and 'C' in the following sequence of reactions:
Answer» Choose the correct options regarding 'B' and 'C' in the following sequence of reactions:

Discussion

21.	If polarizing power is in order of M+a>M+b>M+c and polarizibility is in order of X−>Y−>Z−, then select which of the following compounds have more covalent character as compared to M+bY−
Answer» If polarizing power is in order of $M_{a}^{+} > M_{b}^{+} > M_{c}^{+}$ and polarizibility is in order of $X^{-} > Y^{-} > Z^{-}$ , then select which of the following compounds have more covalent character as compared to $M_{b}^{+} Y^{-}$

Discussion

22.	A gas is present above and below the piston in a cylinder fitted with movable piston having a certain mass. On both sides of the piston there are equal number of moles of gas. The volume above is two times the volume below at a temperature of 300 K. At what temperature will the volume above be four times the volume below?
Answer» A gas is present above and below the piston in a cylinder fitted with movable piston having a certain mass. On both sides of the piston there are equal number of moles of gas. The volume above is two times the volume below at a temperature of $300 K$ . At what temperature will the volume above be four times the volume below?

Discussion

23.	The KP value for the reaction H2(g)+I2(g)⇌2HI(g) at 460 oC is 49. If the initial pressure of H2 and I2 is 0.5 atm respectively, determine the partial pressure of H2 in atm at equilibrium.(give your answer upto 2 decimal)
Answer» The $K_{P}$ value for the reaction $H_{2} (g) + I_{2} (g) ⇌ 2 H I (g)$ at $460^{o} C$ is 49. If the initial pressure of $H_{2}$ and $I_{2}$ is $0.5 a t m$ respectively, determine the partial pressure of $H_{2}$ in atm at equilibrium.(give your answer upto 2 decimal)

Discussion

24.	The maximum bond angle at nitrogen is present in which of the following species?
Answer» The maximum bond angle at nitrogen is present in which of the following species?

Discussion

25.	One mole of the complex Co(NH3)5Cl3 gives 3 moles of ions on dissolution in water. One mole of the same complex reacts with 2 moles of AgNO3 to yield 2 moles of AgCl(s). The complex is:
Answer» One mole of the complex $C o (N H_{3})_{5} C l_{3}$ gives 3 moles of ions on dissolution in water. One mole of the same complex reacts with 2 moles of $A g N O_{3}$ to yield 2 moles of $A g C l_{(s)}$ . The complex is:

Discussion

26.	Out of the following elements, which will not give any characteristic flame colouration:
Answer» Out of the following elements, which will not give any characteristic flame colouration:

Discussion

27.	Which of the following is a colligative property?
Answer» Which of the following is a colligative property?

Discussion

28.	A sample of soil is mixed with water and allowed to settle. The clear supernatant solution turns the pH paper yellowish-orange. Which of the following would change the colour of this pH paper to greenish-blue?
Answer» A sample of soil is mixed with water and allowed to settle. The clear supernatant solution turns the pH paper yellowish-orange. Which of the following would change the colour of this pH paper to greenish-blue?

Discussion

29.	Ethyne reacts with water in presence of Mercuric sulphate and dilute sulphuric acid to give
Answer» Ethyne reacts with water in presence of Mercuric sulphate and dilute sulphuric acid to give

Discussion

30.	Which of the following is TRUE for NaCl type structure?
Answer» Which of the following is TRUE for NaCl type structure?

Discussion

31.	The atomic radii of alkali metals (M) lie in the order \(Li < Na < K
Answer» The atomic radii of alkali metals (M) lie in the order \(Li < Na < K

Discussion

32.	Which of the following represents the correct structure of compound with IUPAC name 3,6-Diisopropyl-2,6-dimethylnonane?
Answer» Which of the following represents the correct structure of compound with IUPAC name 3,6-Diisopropyl-2,6-dimethylnonane?

Discussion

33.	The reaction of white phosphorus with aqueous NaOH gives phosphine along with another phosphorus containing compound. The reaction type, the oxidation states of phosphorus in phosphine and the other product are respectively:
Answer» The reaction of white phosphorus with aqueous NaOH gives phosphine along with another phosphorus containing compound. The reaction type, the oxidation states of phosphorus in phosphine and the other product are respectively:

Discussion

34.	Among the following species the pair that have V-shaped geometry is:
Answer» Among the following species the pair that have V-shaped geometry is:

Discussion

35.	All inner orbital complexes are low spin complexes.
Answer» All inner orbital complexes are low spin complexes.

Discussion

36.	The following alcohol is treated with conc. H2SO4, the major product obtained is ?
Answer» The following alcohol is treated with conc. $H_{2} S O_{4}$ , the major product obtained is ?

Discussion

37.	Which of the following is true for H2O(l)⇌H2O(v) at 1 atm and 100∘C?
Answer» Which of the following is true for $H_{2} O (l) ⇌ H_{2} O (v)$ at 1 atm and $100^{\circ} C ?$

Discussion

38.	Which of the following have α-Hydrogens ?
Answer» Which of the following have $α$ -Hydrogens ?

Discussion

39.	Which of the following will show geometrical isomerism?
Answer» Which of the following will show geometrical isomerism?

Discussion

40.	In thermodynamics which one of the following is not an intensive property
Answer» In thermodynamics which one of the following is not an intensive property

Discussion

41.	Which of the following equation is not actually observed?
Answer» Which of the following equation is not actually observed?

Discussion

42.	2.7 g of a salt ACl (of weak base AOH) is dissolved in 250 mL of water. The pH of the resultant solution was found to be 5. Find the density if ACl forms CsCl type crystal structure. Given: Kb(AOH)=2×10−5; a3=3×10−23 cm3;Na=6×1023
Answer» 2.7 g of a salt $A C l$ (of weak base AOH) is dissolved in 250 mL of water. The pH of the resultant solution was found to be 5. Find the density if $A C l$ forms $C s C l$ type crystal structure. Given: $K_{b (A O H)} = 2 \times 10^{- 5}; a^{3} = 3 \times 10^{- 23} c m^{3}; N_{a} = 6 \times 10^{23}$

Discussion

43.	Nitrous oxide (N2O) can be formed by the decomposition of
Answer» Nitrous oxide $(N_{2} O)$ can be formed by the decomposition of

Discussion

44.	How many isomers are possible for the complex, Pt(NH3)2(SCN)2?
Answer» How many isomers are possible for the complex, $P t (N H_{3})_{2} (S C N)_{2}$ ?

Discussion

45.	In nucleoside, a base is attached at 1' position of sugar moiety. Nucleotide is formed by linking of phosphotic acid unit to the sugar unit of nucleoside. At which position of sugar unit is the phosphoric acid linked in a nucleoside to give a nucleotide?
Answer» In nucleoside, a base is attached at 1' position of sugar moiety. Nucleotide is formed by linking of phosphotic acid unit to the sugar unit of nucleoside. At which position of sugar unit is the phosphoric acid linked in a nucleoside to give a nucleotide?

Discussion

46.	Which of the following statements is not correct for a nucleophile?
Answer» Which of the following statements is not correct for a nucleophile?

Discussion

47.	Entropy change involved in conversion of one mole of liquid water at 373 K to vapour at the same temperature (latent heat of vaporisation of water =2.257 kJg−1).
Answer» Entropy change involved in conversion of one mole of liquid water at $373 K$ to vapour at the same temperature (latent heat of vaporisation of water $= 2.257 k J g^{- 1})$ .

Discussion

48.	Which one of the following has the highest boiling point?
Answer» Which one of the following has the highest boiling point?

Discussion

49.	The decreasing nucleophilic order of the following compound is: (i)ΘCH3 (ii)ΘNH2 (iii)ΘOH (iv)ΘF
Answer» The decreasing nucleophilic order of the following compound is: $(i) Θ C H_{3}$ $(i i) Θ N H_{2}$ $(i i i) Θ O H$ $(i v) Θ F$

49.

The decreasing nucleophilic order of the following compound is: (i)ΘCH3 (ii)ΘNH2 (iii)ΘOH (iv)ΘF

Answer»

The decreasing nucleophilic order of the following compound is:

$(i) Θ C H_{3}$

$(i i) Θ N H_{2}$

$(i i i) Θ O H$

$(i v) Θ F$

Discussion

50.	Does NaBH4 reduces acid anhydride?
Answer» Does NaBH4 reduces acid anhydride?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

What is the decreasing order of strengths of the following bases? ⊖OH,NH⊖2,H−C≡C⊖,andCH3−CH⊖2

When equal volume of 2 liquid are mixed the specific gravity of mixture is 7 by 2 when equal masses of the same to liquid mixed the specific gravity is 12 by 7 find the specific gravity of 2 liquid

What is the gas present in the space

Do double bonds really exist? Why

Formula for anhydride of deutero sulphuric acid is

Which has no rotation of symmetry

Assertion (A): Classical smog occurs in cold humid climate and it is acidic as well as reducing in nature. Reason (R): It is a mixture of smoke, fog and sulphur dioxide.

Study the given reaction below. 2Pb(NO3)2→2PbO+nA+O2 In the above reaction, what is nA?

In the crystals of which of the following ionic compounds would you expect maximum distance between centres of cations and anions [CBSE PMT 1998]

What is de- icing agents?How does it work?

The species: H2O,HCO−3,HSO−4 and NH3 can act both as Brönsted acids and bases. For each case give the corresponding conjugate acid and base.

What do you understand by activation of adsorbent? How is it achieved?

If one litre of water contains 10−5 moles of H+ ions at a certain temperature. Calculate the degree of ionization of water.

What will be the major product when Ph – Ph is mononitrated?

Consider a system containing one mole of a diatomic gas, contained in a piston. What is the temperature change of the gas, if q=100 J and W=−200 J? (Given Cv=52R, R=8.3 JK−1mol−1 )

Which of the following configurations represents atoms of the elements having the highest second ionization energy

Question 11 In which of the following substances will hydrogen bond be strongest? (a) HCl (b) H2O (c) HI (d)H2S

The IUPAC name of the compound CH3−CH2−CH|OCH3−CH2−OH is

Choose the correct options regarding 'B' and 'C' in the following sequence of reactions:

If polarizing power is in order of M+a&gt;M+b&gt;M+c and polarizibility is in order of X−&gt;Y−&gt;Z−, then select which of the following compounds have more covalent character as compared to M+bY−

The KP value for the reaction H2(g)+I2(g)⇌2HI(g) at 460 oC is 49. If the initial pressure of H2 and I2 is 0.5 atm respectively, determine the partial pressure of H2 in atm at equilibrium.(give your answer upto 2 decimal)

The maximum bond angle at nitrogen is present in which of the following species?

One mole of the complex Co(NH3)5Cl3 gives 3 moles of ions on dissolution in water. One mole of the same complex reacts with 2 moles of AgNO3 to yield 2 moles of AgCl(s). The complex is:

Out of the following elements, which will not give any characteristic flame colouration:

Which of the following is a colligative property?

A sample of soil is mixed with water and allowed to settle. The clear supernatant solution turns the pH paper yellowish-orange. Which of the following would change the colour of this pH paper to greenish-blue?

Ethyne reacts with water in presence of Mercuric sulphate and dilute sulphuric acid to give

Which of the following is TRUE for NaCl type structure?

The atomic radii of alkali metals (M) lie in the order \(Li &lt; Na &lt; K

Which of the following represents the correct structure of compound with IUPAC name 3,6-Diisopropyl-2,6-dimethylnonane?

The reaction of white phosphorus with aqueous NaOH gives phosphine along with another phosphorus containing compound. The reaction type, the oxidation states of phosphorus in phosphine and the other product are respectively:

Among the following species the pair that have V-shaped geometry is:

All inner orbital complexes are low spin complexes.

The following alcohol is treated with conc. H2SO4, the major product obtained is ?

Which of the following is true for H2O(l)⇌H2O(v) at 1 atm and 100∘C?

Which of the following have α-Hydrogens ?

Which of the following will show geometrical isomerism?

In thermodynamics which one of the following is not an intensive property

Which of the following equation is not actually observed?

2.7 g of a salt ACl (of weak base AOH) is dissolved in 250 mL of water. The pH of the resultant solution was found to be 5. Find the density if ACl forms CsCl type crystal structure. Given: Kb(AOH)=2×10−5; a3=3×10−23 cm3;Na=6×1023

Nitrous oxide (N2O) can be formed by the decomposition of

How many isomers are possible for the complex, Pt(NH3)2(SCN)2?

In nucleoside, a base is attached at 1' position of sugar moiety. Nucleotide is formed by linking of phosphotic acid unit to the sugar unit of nucleoside. At which position of sugar unit is the phosphoric acid linked in a nucleoside to give a nucleotide?

Which of the following statements is not correct for a nucleophile?

Entropy change involved in conversion of one mole of liquid water at 373 K to vapour at the same temperature (latent heat of vaporisation of water =2.257 kJg−1).

Which one of the following has the highest boiling point?

The decreasing nucleophilic order of the following compound is: (i)ΘCH3 (ii)ΘNH2 (iii)ΘOH (iv)ΘF

Does NaBH4 reduces acid anhydride?

If polarizing power is in order of M+a>M+b>M+c and polarizibility is in order of X−>Y−>Z−, then select which of the following compounds have more covalent character as compared to M+bY−

The atomic radii of alkali metals (M) lie in the order \(Li < Na < K