46295 + Interview Questions in Chemistry

1.	Pd has exceptional outer electronic configuration as 4d10 5s0, it belongs to
Answer» Pd has exceptional outer electronic configuration as $4 d^{10} 5 s^{0}$ , it belongs to

Discussion

2.	An acidic solution has pH = 5. It's [OH⊖] concentration is (in mol/L) –
Answer» An acidic solution has pH = 5. It's $[O H^{⊖}]$ concentration is (in mol/L) –

Discussion

3.	If the radius of the 3rd Bohr orbit of hydrogen is r, then the wavelength of an electron in the 6th orbit of a hydrogen atom is equal to
Answer» If the radius of the $3^{r d}$ Bohr orbit of hydrogen is r, then the wavelength of an electron in the $6^{t h}$ orbit of a hydrogen atom is equal to

Discussion

4.	What kind of isomerism exists between [Cr(H2O)6]Cl3 (violet) and [Cr(H2O)5Cl]Cl2.H2O (greyish−green)? (a) Linkage isomerism (b) Solvate isomerism (c) Ionisation isomerism (d) Coordination isomerism
Answer» What kind of isomerism exists between $[C r (H_{2} O)_{6}] C l_{3} (v i o l e t)$ and $[C r (H_{2} O)_{5} C l] C l_{2} . H_{2} O (g r e y i s h - g r e e n)$ ? (a) Linkage isomerism (b) Solvate isomerism (c) Ionisation isomerism (d) Coordination isomerism

Discussion

5.	What do you mean by invert sugar
Answer» What do you mean by invert sugar

Discussion

6.	Which of the following doesn’t react with ethanol KCN?
Answer» Which of the following doesn’t react with ethanol KCN?

Discussion

7.	Consider the following reversible reaction. A(g)+B(g)→AB(g) The activation energy of the backward reaction exceeds that of the forward reaction by 2RT (Jmol−1). If the pre-exponential factor of the forward reaction is 4 times that of the reverse reaction, the absolute value of ΔGo (Jmol−1) for the reaction at 300 K is . (Given: ln2=0.7; RT=2500 Jmol−1 at 300 K; G is Gibbs energy)
Answer» Consider the following reversible reaction. $A (g) + B (g) \to A B (g)$ The activation energy of the backward reaction exceeds that of the forward reaction by $2 R T (J m o l^{- 1})$ . If the pre-exponential factor of the forward reaction is 4 times that of the reverse reaction, the absolute value of $Δ G^{o} (J m o l^{- 1})$ for the reaction at $300 K$ is . $(G i v e n : l n 2 = 0.7; R T = 2500 J m o l^{- 1} at 300 K; G is Gibbs energy)$

Discussion

8.	0.06% (w/v)aqueous solution of urea is isotonic with:
Answer» $0.06 %$ (w/v)aqueous solution of urea is isotonic with:

Discussion

9.	Which term is to be correctly used for expressing concentration of electrolytes in solution?
Answer» Which term is to be correctly used for expressing concentration of electrolytes in solution?

Discussion

10.	Under the influence of electric field, which of the following statement is true about the movement of electrons and holes in a p-type semiconductor ? (a) Electron will move towards the positively charged plate through electron holes (b) Holes will appear to be moving towards the negatively charge plate (c) Both electrons and holes appear to move towards the positively charged plate (d) Movement of electrons is not related to the movement of holes
Answer» Under the influence of electric field, which of the following statement is true about the movement of electrons and holes in a p-type semiconductor ? (a) Electron will move towards the positively charged plate through electron holes (b) Holes will appear to be moving towards the negatively charge plate (c) Both electrons and holes appear to move towards the positively charged plate (d) Movement of electrons is not related to the movement of holes

10.

Under the influence of electric field, which of the following statement is true about the movement of electrons and holes in a p-type semiconductor ? (a) Electron will move towards the positively charged plate through electron holes (b) Holes will appear to be moving towards the negatively charge plate (c) Both electrons and holes appear to move towards the positively charged plate (d) Movement of electrons is not related to the movement of holes

Answer»

Under the influence of electric field, which of the following statement is true about the movement of electrons and holes in a p-type semiconductor ?

(a) Electron will move towards the positively charged plate through electron holes

(b) Holes will appear to be moving towards the negatively charge plate

(c) Both electrons and holes appear to move towards the positively charged plate

(d) Movement of electrons is not related to the movement of holes

Discussion

11.	What is the final product 'P' in the following reaction sequence?
Answer» What is the final product 'P' in the following reaction sequence?

Discussion

12.	The precursor of Indole 3 acetic acid is
Answer» The precursor of Indole 3 acetic acid is

Discussion

13.	Question 59 When kept in water, raisin swells in size. Name and explain the phenomenon involved with the help of a diagram. Give three applications of the phenomenon.
Answer» Question 59 When kept in water, raisin swells in size. Name and explain the phenomenon involved with the help of a diagram. Give three applications of the phenomenon.

Discussion

14.	If a given mass of gas occupies a volume of 100cc at 1 atm and at a temperature of 100°C. What will be its volume at 4 atm , the temperature being constant
Answer» If a given mass of gas occupies a volume of 100cc at 1 atm and at a temperature of 100^°C. What will be its volume at 4 atm , the temperature being constant

Discussion

15.	State Nernst equation.
Answer» State Nernst equation.

Discussion

16.	In which of the following are the chemical formula and the name correctly matched?
Answer» In which of the following are the chemical formula and the name correctly matched?

Discussion

17.	The decreasding order of priority for the following functional groups (for IUPAC nomenclature) is: (1) −CONH2 > (2) −C≡N > (3) −CHO > (4) −O\|\|C−
Answer» The decreasding order of priority for the following functional groups (for IUPAC nomenclature) is: (1) $- C O N H_{2}$ > (2) $- C \equiv N$ > (3) $- C H O$ > (4) $- O \| \| C -$

Discussion

18.	Example for valence band and conduction band
Answer» Example for valence band and conduction band

Discussion

19.	The final product in the given reaction is: CyclohexeneKMnO4−−−−−−→H2SO4, Δ
Answer» The final product in the given reaction is: $Cyclohexene K M n O_{4} - ----- \to H_{2} S O_{4}, Δ$

Discussion

20.	In the Bohr's model for the hydrogen-like atoms, how does the orbital radius depend upon the principal quantum numbern ? Z Is the atomic number.
Answer» In the Bohr's model for the hydrogen-like atoms, how does the orbital radius depend upon the principal quantum numbern ? Z Is the atomic number.

Discussion

21.	Final product (B) is:
Answer» Final product (B) is:

Discussion

22.	Cryoscopic constant is related to enthalpy of fusion, molar mass and freezing point of the solvent and Kf as:
Answer» Cryoscopic constant is related to enthalpy of fusion, molar mass and freezing point of the solvent and K_f as:

Discussion

23.	Observe the given compound. Which of the following is best suited to synthesize the compound via an SN2 reaction?
Answer» Observe the given compound. Which of the following is best suited to synthesize the compound via an $S_{N} 2$ reaction?

Discussion

24.	Find the number of Na+ &PO-34 ions kind 250 ml of 0.2 M Na3PO4 solution.
Answer» Find the number of Na⁺ &PO^-3₄ ions kind 250 ml of 0.2 M Na3PO4 solution.

Discussion

25.	Q82) At present the most powerful supercomputer in the world is:
Answer» Q82) At present the most powerful supercomputer in the world is:

Discussion

26.	Why do aquatic animals prefer to stay at lower level of water during Summer ?
Answer» Why do aquatic animals prefer to stay at lower level of water during Summer ?

Discussion

27.	The strongest −I effect with reference to hydrogen is shown by:
Answer» The strongest $- I$ effect with reference to hydrogen is shown by:

Discussion

28.	Complete the following reaction by filling the appropriate choice: 6XeF4+12H2O→4Xe+2XeO3+(i)+(ii) XeF6+3H2O→(iii)+6HF
Answer» Complete the following reaction by filling the appropriate choice: $6 X e F_{4} + 12 H_{2} O \to 4 X e + 2 X e O_{3} + (i) + (i i)$ $X e F_{6} + 3 H_{2} O \to (i i i) + 6 H F$

Discussion

29.	What will be the normality of a solution obtained by mixing 100 mL 0.1 N HCl and 200 mL 0.25 N HNO3 ?
Answer» What will be the normality of a solution obtained by mixing $100 m L 0.1 N H C l$ and $200 m L 0.25 N H N O_{3}$ ?

Discussion

30.	For sodium acetate solution in water, the given equilibrium reaction occur: CH3COO− (aq)+H2O (l)hydrolysis⇌CH3COOH (aq)+OH− (aq) Which of the following describes the correct relation ? (where h is the degree of hydrolysis of salt)
Answer» For sodium acetate solution in water, the given equilibrium reaction occur: $C H_{3} C O O^{-} (a q) + H_{2} O (l) h y d r o l y s i s ⇌ C H_{3} C O O H (a q) + O H^{-} (a q)$ Which of the following describes the correct relation ? (where $h$ is the degree of hydrolysis of salt)

Discussion

31.	Which of the following represent correct order of conductivity in solids ? (a) Kmetals >> Kinsulators < Ksemiconductors (b) Kmetals << Kinsulators < Ksemiconductors (c) Kmetals.,Ksemiconductors > Kinsulators=zero (d) Kmetals < Ksemiconductors > Kinsulators≠zero
Answer» Which of the following represent correct order of conductivity in solids ? (a) $K_{m e t a l s} >> K_{i n s u l a t o r s} < K_{s e m i c o n d u c t o r s}$ (b) $K_{m e t a l s} << K_{i n s u l a t o r s} < K_{s e m i c o n d u c t o r s}$ (c) $K_{m e t a l s} ., K_{s e m i c o n d u c t o r s} > K_{i n s u l a t o r s} = z e r o$ (d) $K_{m e t a l s} < K_{s e m i c o n d u c t o r s} > K_{i n s u l a t o r s} \neq z e r o$

31.

Which of the following represent correct order of conductivity in solids ? (a) Kmetals >> Kinsulators < Ksemiconductors (b) Kmetals << Kinsulators < Ksemiconductors (c) Kmetals.,Ksemiconductors > Kinsulators=zero (d) Kmetals < Ksemiconductors > Kinsulators≠zero

Answer»

Which of the following represent correct order of conductivity in solids ?

(a) $K_{m e t a l s} >> K_{i n s u l a t o r s} < K_{s e m i c o n d u c t o r s}$

(b) $K_{m e t a l s} << K_{i n s u l a t o r s} < K_{s e m i c o n d u c t o r s}$

(c) $K_{m e t a l s} ., K_{s e m i c o n d u c t o r s} > K_{i n s u l a t o r s} = z e r o$

(d) $K_{m e t a l s} < K_{s e m i c o n d u c t o r s} > K_{i n s u l a t o r s} \neq z e r o$

Discussion

32.	For the given resonating structures , The correct stability order is :
Answer» For the given resonating structures , The correct stability order is :

Discussion

33.	Equal volumes of oxygen gas and a second gas weigh 1.00 and 2.375 grams respectively under the same experimental conditions. Which of the following is the unknown gas?
Answer» Equal volumes of oxygen gas and a second gas weigh 1.00 and 2.375 grams respectively under the same experimental conditions. Which of the following is the unknown gas?

Discussion

34.	The only correct combination in which diazonium group has been replaced
Answer» The only correct combination in which diazonium group has been replaced

Discussion

35.	A crystalline hydrated salt on being rendered anhydrous loses 45.6% of its weight. The percentage composition of the anhydrous salt is: Al=10.5%, K=15.1%, S=24.8% and oxygen =49.6% [Molar mass of Al=27,K=39,S=32]. What is the empirical formula of the salt?
Answer» A crystalline hydrated salt on being rendered anhydrous loses 45.6% of its weight. The percentage composition of the anhydrous salt is: $A l = 10.5 %, K = 15.1 %, S = 24.8 %$ and oxygen $= 49.6 %$ [Molar mass of $A l = 27, K = 39, S = 32$ ]. What is the empirical formula of the salt?

Discussion

36.	Which of the following reaction will not be favourable in the forward direction?
Answer» Which of the following reaction will not be favourable in the forward direction?

Discussion

37.	Which of the compound undergoes electrophilic substition most easily?
Answer» Which of the compound undergoes electrophilic substition most easily?

Discussion

38.	What is the structure of monoclinic sulphur? How is it different from the crown structure of rhombic?
Answer» What is the structure of monoclinic sulphur? How is it different from the crown structure of rhombic?

Discussion

39.	Give plausible explanation for each of the following : Why are aliphatic amines stronger bases than aromatic amines?
Answer» Give plausible explanation for each of the following : Why are aliphatic amines stronger bases than aromatic amines?

39.

Give plausible explanation for each of the following : Why are aliphatic amines stronger bases than aromatic amines?

Answer»

Give plausible explanation for each of the following :

Why are aliphatic amines stronger bases than aromatic amines?

Discussion

40.	Among the following compounds intramolecular hydrogen bonding is present in:
Answer» Among the following compounds intramolecular hydrogen bonding is present in:

Discussion

41.	Allylic substitution in CH3CH=CH2 may be carried out by
Answer» Allylic substitution in $C H_{3} C H = C H_{2}$ may be carried out by

Discussion

42.	In dilute aqueous solution, formaldehyde exists as ?
Answer» In dilute aqueous solution, formaldehyde exists as ?

Discussion

43.	The viscosity of liquids _________ with increase in temperature.
Answer» The viscosity of liquids _________ with increase in temperature.

Discussion

44.	The apparatus consists of three temperature jacketed 1.000 L bulbs connected by stopcocks. Bulb A contains a mixture of H2O(g), CO2(g), and N2(g) at 25∘C and a total pressure of 564 mm Hg. Bulb B is empty and is held at a temperature of −70∘C. Bulb C is also empty and is held at a temperature of −190∘C. The stopcocks are closed, and the volume of the lines connecting the bulbs is zero. CO2 sublimes at −78∘C, and N2 boils at −196∘C. The stopcock between A and B is opened, and the system is allowed to come to equilibrium. The pressure in A and B is now 219 mm Hg. What does bulb A contain?
Answer» The apparatus consists of three temperature jacketed 1.000 L bulbs connected by stopcocks. Bulb A contains a mixture of $H_{2} O (g)$ , $C O_{2} (g)$ , and $N_{2} (g)$ at $25^{\circ} C$ and a total pressure of 564 mm Hg. Bulb B is empty and is held at a temperature of $- 70^{\circ} C$ . Bulb C is also empty and is held at a temperature of $- 190^{\circ} C$ . The stopcocks are closed, and the volume of the lines connecting the bulbs is zero. $C O_{2}$ sublimes at $- 78^{\circ} C$ , and $N_{2}$ boils at $- 196^{\circ} C$ . The stopcock between A and B is opened, and the system is allowed to come to equilibrium. The pressure in A and B is now 219 mm Hg. What does bulb A contain?

Discussion

45.	Which one of the following statements for the order of a reaction is incorrect?
Answer» Which one of the following statements for the order of a reaction is incorrect?

Discussion

46.	A permissible solution to the schrodigner wave equation gave an idea of _____ quantum numbers.
Answer» A permissible solution to the schrodigner wave equation gave an idea of _____ quantum numbers.

Discussion

47.	Thermal decomposition of which of the following does/do not give N2 gas?
Answer» Thermal decomposition of which of the following does/do not give $N_{2}$ gas?

Discussion

48.	Which of the following shows electrical conduction [CBSE PMT 1999; AIIMS 1999]
Answer» Which of the following shows electrical conduction [CBSE PMT 1999; AIIMS 1999]

48.

Which of the following shows electrical conduction [CBSE PMT 1999; AIIMS 1999]

Answer»

Which of the following shows electrical conduction

[CBSE PMT 1999; AIIMS 1999]

Discussion

49.	A sample of charcoal weighing 6.0 g was brought into contact with a gas contained in a vessel of 1 litre capacity at 27°C. The pressure of the gas falls from 780 to 400 torr. The density of charcoal sample was 1.5 g/mL. The volume of gas (at STP) that is adsorbed per g (mL/g) of the adsorbent under the condition of experiment is (Round off upto two decimal places.) (Use R = 112 Latm/mol)
Answer» A sample of charcoal weighing 6.0 g was brought into contact with a gas contained in a vessel of 1 litre capacity at 27°C. The pressure of the gas falls from 780 to 400 torr. The density of charcoal sample was 1.5 g/mL. The volume of gas (at STP) that is adsorbed per g (mL/g) of the adsorbent under the condition of experiment is (Round off upto two decimal places.) (Use R = $\frac{1}{12} L a t m / m o l$ )

Discussion

50.	In RNA, thymine replaced
Answer» In RNA, thymine replaced

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Pd has exceptional outer electronic configuration as 4d10 5s0, it belongs to

An acidic solution has pH = 5. It's [OH⊖] concentration is (in mol/L) –

If the radius of the 3rd Bohr orbit of hydrogen is r, then the wavelength of an electron in the 6th orbit of a hydrogen atom is equal to

What kind of isomerism exists between [Cr(H2O)6]Cl3 (violet) and [Cr(H2O)5Cl]Cl2.H2O (greyish−green)? (a) Linkage isomerism (b) Solvate isomerism (c) Ionisation isomerism (d) Coordination isomerism

What do you mean by invert sugar

Which of the following doesn’t react with ethanol KCN?

0.06% (w/v)aqueous solution of urea is isotonic with:

Which term is to be correctly used for expressing concentration of electrolytes in solution?

What is the final product 'P' in the following reaction sequence?

The precursor of Indole 3 acetic acid is

Question 59 When kept in water, raisin swells in size. Name and explain the phenomenon involved with the help of a diagram. Give three applications of the phenomenon.

If a given mass of gas occupies a volume of 100cc at 1 atm and at a temperature of 100°C. What will be its volume at 4 atm , the temperature being constant

State Nernst equation.

In which of the following are the chemical formula and the name correctly matched?

The decreasding order of priority for the following functional groups (for IUPAC nomenclature) is: (1) −CONH2 &gt; (2) −C≡N &gt; (3) −CHO &gt; (4) −O||C−

Example for valence band and conduction band

The final product in the given reaction is: CyclohexeneKMnO4−−−−−−→H2SO4, Δ

In the Bohr's model for the hydrogen-like atoms, how does the orbital radius depend upon the principal quantum numbern ? Z Is the atomic number.

Final product (B) is:

Cryoscopic constant is related to enthalpy of fusion, molar mass and freezing point of the solvent and Kf as:

Observe the given compound. Which of the following is best suited to synthesize the compound via an SN2 reaction?

Find the number of Na+ &amp;PO-3​​​​4 ions kind 250 ml of 0.2 M Na3PO4 solution.

Q82) At present the most powerful supercomputer in the world is:

Why do aquatic animals prefer to stay at lower level of water during Summer ?

The strongest −I effect with reference to hydrogen is shown by:

Complete the following reaction by filling the appropriate choice: 6XeF4+12H2O→4Xe+2XeO3+(i)+(ii) XeF6+3H2O→(iii)+6HF

What will be the normality of a solution obtained by mixing 100 mL 0.1 N HCl and 200 mL 0.25 N HNO3 ?

For sodium acetate solution in water, the given equilibrium reaction occur: CH3COO− (aq)+H2O (l)hydrolysis⇌CH3COOH (aq)+OH− (aq) Which of the following describes the correct relation ? (where h is the degree of hydrolysis of salt)

Which of the following represent correct order of conductivity in solids ? (a) Kmetals &gt;&gt; Kinsulators &lt; Ksemiconductors (b) Kmetals &lt;&lt; Kinsulators &lt; Ksemiconductors (c) Kmetals.,Ksemiconductors &gt; Kinsulators=zero (d) Kmetals &lt; Ksemiconductors &gt; Kinsulators≠zero

For the given resonating structures , The correct stability order is :

Equal volumes of oxygen gas and a second gas weigh 1.00 and 2.375 grams respectively under the same experimental conditions. Which of the following is the unknown gas?

The only correct combination in which diazonium group has been replaced

A crystalline hydrated salt on being rendered anhydrous loses 45.6% of its weight. The percentage composition of the anhydrous salt is: Al=10.5%, K=15.1%, S=24.8% and oxygen =49.6% [Molar mass of Al=27,K=39,S=32]. What is the empirical formula of the salt?

Which of the following reaction will not be favourable in the forward direction?

Which of the compound undergoes electrophilic substition most easily?

What is the structure of monoclinic sulphur? How is it different from the crown structure of rhombic?

Give plausible explanation for each of the following : Why are aliphatic amines stronger bases than aromatic amines?

Among the following compounds intramolecular hydrogen bonding is present in:

Allylic substitution in CH3CH=CH2 may be carried out by

In dilute aqueous solution, formaldehyde exists as ?

The viscosity of liquids _________ with increase in temperature.

Which one of the following statements for the order of a reaction is incorrect?

A permissible solution to the schrodigner wave equation gave an idea of _____ quantum numbers.

Thermal decomposition of which of the following does/do not give N2 gas?

Which of the following shows electrical conduction [CBSE PMT 1999; AIIMS 1999]

In RNA, thymine replaced

The decreasding order of priority for the following functional groups (for IUPAC nomenclature) is: (1) −CONH2 > (2) −C≡N > (3) −CHO > (4) −O||C−

Find the number of Na+ &PO-34 ions kind 250 ml of 0.2 M Na3PO4 solution.

Which of the following represent correct order of conductivity in solids ? (a) Kmetals >> Kinsulators < Ksemiconductors (b) Kmetals << Kinsulators < Ksemiconductors (c) Kmetals.,Ksemiconductors > Kinsulators=zero (d) Kmetals < Ksemiconductors > Kinsulators≠zero