46295 + Interview Questions in Chemistry

1.	Which of the following statements is/are correct?
Answer» Which of the following statements is/are correct?

Discussion

2.	Which of the following will not be oxidised by O3 ?
Answer» Which of the following will not be oxidised by $O_{3}$ ?

Discussion

3.	Match the compounds given in Column I with the oxidation state of cobalt present in it (given in column II) and assign the correct code. Column~I Column~II (Compound) (Oxidation state of Co)A. [Co(NCS)(NH3)5](SO3)1. +4B. [Co(NH3)4Cl2]SO42. 0C. Na4[Co(S2O3)3]3. +2A. [Co2(CO)8]4. +3 Code ABCD(a)1243(b)4321(c)3142(d)4132
Answer» Match the compounds given in Column I with the oxidation state of cobalt present in it (given in column II) and assign the correct code. $\begin{matrix} Column~I & Column~II (C o m p o u n d) & (O x i d a t i o n s t a t e o f C o) A . [C o (N C S) (N H_{3})_{5}] (S O_{3}) & 1. + 4 B . [C o (N H_{3})_{4} C l_{2}] S O_{4} & 2. 0 C . N a_{4} [C o (S_{2} O_{3})_{3}] & 3. + 2 A . [C o_{2} (C O)_{8}] & 4. + 3 \end{matrix}$ Code $\begin{matrix} A & B & C & D (a) & 1 & 2 & 4 & 3 (b) & 4 & 3 & 2 & 1 (c) & 3 & 1 & 4 & 2 (d) & 4 & 1 & 3 & 2 \end{matrix}$

Discussion

4.	ΔfU⊖ of formation of CH4(g) at certain temperature is-393 kJ mol−1. The value of ΔfH⊖ is (a) zero (b) <ΔfU⊖ (c) >ΔfU⊖ (d) equal to ΔfU⊖
Answer» $Δ_{f} U^{⊖}$ of formation of $C H_{4} (g)$ at certain temperature is-393 kJ $m o l^{- 1}$ . The value of $Δ_{f} H^{⊖}$ is (a) zero (b) $< Δ_{f} U^{⊖}$ (c) $> Δ_{f} U^{⊖}$ (d) equal to $Δ_{f} U^{⊖}$

Discussion

5.	Calculate the pH at the equivalence point of the titration between 0.1 M CH3COOH (25 mL) with 0.05 M NaOH. (Given pKa for CH3COOH=4.74; log(3)=0.48).
Answer» Calculate the $p H$ at the equivalence point of the titration between 0.1 M $C H_{3} C O O H$ (25 mL) with 0.05 M $N a O H$ . (Given $p K_{a}$ for $C H_{3} C O O H = 4.74$ ; log(3)=0.48).

Discussion

6.	To find the distance d over which a signal can be seen clearly in foggy conditions, a railway's engineer uses dimensional analysis and assumes that the distance depends on the mass density ρ of the fog, intensity (power/area) S of the light from the signal and it's frequency f. The engineer finds that d is proportional to S1/n. The value of n is
Answer» To find the distance $d$ over which a signal can be seen clearly in foggy conditions, a railway's engineer uses dimensional analysis and assumes that the distance depends on the mass density $ρ$ of the fog, intensity (power/area) $S$ of the light from the signal and it's frequency $f$ . The engineer finds that $d$ is proportional to $S^{1 / n}$ . The value of $n$ is

Discussion

7.	When 1 mole of a perfect gas is heated by 1 kelvin at constant pressure, the external workdone by the gas is
Answer» When 1 mole of a perfect gas is heated by 1 kelvin at constant pressure, the external workdone by the gas is

Discussion

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

8.

The IUPAC name of CH2−CH2−CH|CH2|CH3−O||C−O−CH3 is

Answer»

The IUPAC name of

$C H_{2} - C H_{2} - C H | C H_{2} | C H_{3} - O | | C - O - C H_{3}$ is

Discussion

9.	The increasing order of magnetic moment values of the given compounds is: (I) [Fe(CN)6]4− (II) [Fe(CN)6]3− (III) [Cr(NH3)6]3+ (IV) [Ni(H2O)6]2+
Answer» The increasing order of magnetic moment values of the given compounds is: $(I) [F e (C N)_{6}]^{4 -}$ $(I I) [F e (C N)_{6}]^{3 -}$ $(I I I) [C r (N H_{3})_{6}]^{3 +}$ $(I V) [N i (H_{2} O)_{6}]^{2 +}$

Discussion

10.	Which of the following curve assures that the metal obtained by carbon reduction is in vapour state
Answer» Which of the following curve assures that the metal obtained by carbon reduction is in vapour state

Discussion

11.	Phosphine (PH3) decomposes to produce P4(g) and H2(g). What would be the change in volume when 100 mL of PH3(g) is completely decomposed?
Answer» Phosphine $(P H_{3})$ decomposes to produce $P_{4} (g) and H_{2} (g)$ . What would be the change in volume when $100 mL$ of $P H_{3} (g)$ is completely decomposed?

Discussion

12.	The energy level diagram for an hydrogen like atom is shown in the figure. The radius of its first Bohr orbit is 0 eV__ n=∞ -6.04 eV___ n=3 -13.6 eV___ n=2 -54.4 eV___ n=1
Answer» The energy level diagram for an hydrogen like atom is shown in the figure. The radius of its first Bohr orbit is 0 eV__ n= $\infty$ -6.04 eV___ n=3 -13.6 eV___ n=2 -54.4 eV___ n=1

12.

The energy level diagram for an hydrogen like atom is shown in the figure. The radius of its first Bohr orbit is 0 eV n=∞ -6.04 eV_ n=3 -13.6 eV_ n=2 -54.4 eV_ n=1

Answer»

The energy level diagram for an hydrogen like atom is shown in the figure. The radius of its first Bohr orbit is
0 eV__ n= $\infty$
-6.04 eV___ n=3
-13.6 eV___ n=2
-54.4 eV___ n=1

Discussion

13.	An organic compound contains C,H and S the minimum molecular weight of the compound containing 10% sulphur is : (atomic weight of S=32 amu)
Answer» An organic compound contains C,H and S the minimum molecular weight of the compound containing 10% sulphur is : (atomic weight of S=32 amu)

Discussion

14.	ABr2−−−→CCl4Bi) alc. KOH−−−−−−−→ii) NaNH2Ci) BH3/THF−−−−−−−−−→ii) H2O2/OH−D D answers positive for Tollens' test, A will be:
Answer» $A B r_{2} - -- \to C C l_{4} B i) a l c . K O H - ------ \to i i) N a N H_{2} C i) B H_{3} / T H F - -------- \to i i) H_{2} O_{2} / O H^{-} D$ D answers positive for Tollens' test, A will be:

Discussion

15.	What is meant by anhydrous, turbidity and crystalline?
Answer» What is meant by anhydrous, turbidity and crystalline?

Discussion

16.	Cyclopentadiene is non-aromatic. Postively charged ion of cyclopentadiene is anti-aromatic whereas negative charged ion of cyclopentadiene is aromatic. Explain.
Answer» Cyclopentadiene is non-aromatic. Postively charged ion of cyclopentadiene is anti-aromatic whereas negative charged ion of cyclopentadiene is aromatic. Explain.

Discussion

17.	AlF3 is soluble in HF only in the presence of KF. It is due to the formation of:
Answer» $A l F_{3}$ is soluble in $H F$ only in the presence of $K F$ . It is due to the formation of:

Discussion

18.	What is antimatter? Does antimatter actually exist?
Answer» What is antimatter? Does antimatter actually exist?

Discussion

19.	Which of the following compounds will not give benzoic acid with KMnO4/HO−/Heat.
Answer» Which of the following compounds will not give benzoic acid with $K M n O_{4} / H O^{-} / H e a t$ .

Discussion

20.	Lithium resembles magnesium in some of its properties. Mention two such properties and give reasons for this resemblance.
Answer» Lithium resembles magnesium in some of its properties. Mention two such properties and give reasons for this resemblance.

Discussion

21.	What is meant by the stability of a coordination compound in solution? State the factors which govern the stability of complexes.
Answer» What is meant by the stability of a coordination compound in solution? State the factors which govern the stability of complexes.

Discussion

22.	Consider low spin complex [Co(NH3)6]2+ and [Co(NH3)4]2+. If △t=49△o and difference in crystal field stabilization energy is x3△o between both the complexes then find the value of x
Answer» Consider low spin complex $[C o (N H_{3})_{6}]^{2 +}$ and $[C o (N H_{3})_{4}]^{2 +}$ . If $△_{t} = \frac{4}{9} △_{o}$ and difference in crystal field stabilization energy is $\frac{x}{3} △_{o}$ between both the complexes then find the value of x

Discussion

23.	Which element is used to make an explosive called Trinitrotoluene (T.N.T)?
Answer» Which element is used to make an explosive called Trinitrotoluene (T.N.T)?

Discussion

24.	Light is a transverse wave, how can it propagate through vacuum?
Answer» Light is a transverse wave, how can it propagate through vacuum?

Discussion

25.	A 10 litre box contains O3 and O2 at equilibrium at 2000K. KP=4×1014 atm for 2O3(g)⇌3O2(g) Assume that pO2>>pO3 and if total pressure is 8 atm, then moles of O3 at equilibrium will be: Take √5=2.2, √3=1.7, √2=1.4
Answer» A 10 litre box contains $O_{3}$ and $O_{2}$ at equilibrium at 2000K. $K_{P} = 4 \times 10^{14}$ atm for $2 O_{3} (g) ⇌ 3 O_{2} (g)$ Assume that $p_{O_{2}} >> p_{O_{3}}$ and if total pressure is 8 atm, then moles of $O_{3}$ at equilibrium will be: Take $\sqrt{5} = 2.2$ , $\sqrt{3} = 1.7$ , $\sqrt{2} = 1.4$

25.

A 10 litre box contains O3 and O2 at equilibrium at 2000K. KP=4×1014 atm for 2O3(g)⇌3O2(g) Assume that pO2>>pO3 and if total pressure is 8 atm, then moles of O3 at equilibrium will be: Take √5=2.2, √3=1.7, √2=1.4

Answer»

A 10 litre box contains $O_{3}$ and $O_{2}$ at equilibrium at 2000K. $K_{P} = 4 \times 10^{14}$ atm for $2 O_{3} (g) ⇌ 3 O_{2} (g)$ Assume that $p_{O_{2}} >> p_{O_{3}}$ and if total pressure is 8 atm, then moles of $O_{3}$ at equilibrium will be:

Take $\sqrt{5} = 2.2$ , $\sqrt{3} = 1.7$ , $\sqrt{2} = 1.4$

Discussion

26.	For the reaction H2 (g) + I2(g)⇌2HI(g),Koc= 66.9 at 350∘C and Koc= 50.0 at 448 ∘C. The reaction has
Answer» For the reaction H $_{2}$ (g) + I $_{2}$ (g) $⇌$ 2HI(g),K $^{o}$ $_{c}$ = 66.9 at 350 $^{\circ}$ C and K $^{o}$ $_{c}$ = 50.0 at 448 $^{\circ}$ C. The reaction has

Discussion

27.	For an equilibrium reaction A (g) + B (g)⇌ C (g) + D (g),ΔH = +ve. An increase in temperature would cause
Answer» For an equilibrium reaction A (g) + B (g) $⇌$ C (g) + D (g), $Δ H$ = +ve. An increase in temperature would cause

Discussion

28.	If I have two lone pairs placed at oposite positions in a compound, so will there be any change in the bond angles? if the answer is no then please explain if I have 4 electron lone pair in the equatorial plane in a square bipyramidal geometry so what would be the change in the bond angles?
Answer» If I have two lone pairs placed at oposite positions in a compound, so will there be any change in the bond angles? if the answer is no then please explain if I have 4 electron lone pair in the equatorial plane in a square bipyramidal geometry so what would be the change in the bond angles?

Discussion

29.	From the following reaction sequence Cl2 + 2KOH → KCl + KClO + H2O 3KClO → 2KCl + KClO3 4KClO3 → 3KClO4+KCl Calculate the mass of chlorine needed to produce 100g of KClO4
Answer» From the following reaction sequence $C l_{2}$ + 2KOH $\to$ KCl + KClO + $H_{2} O$ 3KClO $\to$ 2KCl + $K C l O_{3}$ $4 K C l O_{3}$ $\to$ $3 K C l O_{4} + K C l$ Calculate the mass of chlorine needed to produce 100g of $K C l O_{4}$

29.

From the following reaction sequence Cl2 + 2KOH → KCl + KClO + H2O 3KClO → 2KCl + KClO3 4KClO3 → 3KClO4+KCl Calculate the mass of chlorine needed to produce 100g of KClO4

Answer»

From the following reaction sequence
$C l_{2}$ + 2KOH $\to$ KCl + KClO + $H_{2} O$
3KClO $\to$ 2KCl + $K C l O_{3}$
$4 K C l O_{3}$ $\to$ $3 K C l O_{4} + K C l$

Calculate the mass of chlorine needed to produce 100g of $K C l O_{4}$

Discussion

30.	Which of the following has the maximum covalent radii?
Answer» Which of the following has the maximum covalent radii?

Discussion

31.	It is said that cathode ray particles, when pass through metal, produce heating effect. But how? Please tell me the full process.
Answer» It is said that cathode ray particles, when pass through metal, produce heating effect. But how? Please tell me the full process.

31.

It is said that cathode ray particles, when pass through metal, produce heating effect. But how? Please tell me the full process.

Answer»

It is said that cathode ray particles, when pass through metal, produce heating effect.

But how? Please tell me the full process.

Discussion

32.	C5H11NH2 + O2 -> CO2 + H2O + NO2 ,balance the equation and write the coefficient of O2
Answer» C5H11NH2 + O2 -> CO2 + H2O + NO2 ,balance the equation and write the coefficient of O2

Discussion

33.	Which of the following do not impart colour to the flame?
Answer» Which of the following do not impart colour to the flame?

Discussion

34.	H - atom in its ground state is excited by means of monochromatic radiation of wavelength 970.6A0 then
Answer» H - atom in its ground state is excited by means of monochromatic radiation of wavelength $970.6 A^{0}$ then

Discussion

35.	Gold crystallises in CCP structure. What is the total number of voids present in 197g of gold.
Answer» Gold crystallises in CCP structure. What is the total number of voids present in 197g of gold.

Discussion

36.	What is carbide?
Answer» What is carbide?

Discussion

37.	how many nearest and next nearest neighbours respectively each potassium has in BCC lattice
Answer» how many nearest and next nearest neighbours respectively each potassium has in BCC lattice

Discussion

38.	Calculate number of atoms present 10g of oxygen in CaCo3
Answer» Calculate number of atoms present 10g of oxygen in CaCo₃

Discussion

39.	Preparation of sodium hydroxide
Answer» Preparation of sodium hydroxide

Discussion

40.	Dry cell has a small life time because of the corrosion of Zn container to form .
Answer» Dry cell has a small life time because of the corrosion of Zn container to form .

Discussion

41.	The value of magnetic moment is zero in the case of antiferromagnetic substances because the domains ........... (a) get oriented in the direction of the applied magnetic fiels (b) get oriented opposite to the direction of the applied magnetic fiels (c) are oppositely oriented with respect to each other withot the application of magnetic field (d) cancel out each other's magnetic moment
Answer» The value of magnetic moment is zero in the case of antiferromagnetic substances because the domains ........... (a) get oriented in the direction of the applied magnetic fiels (b) get oriented opposite to the direction of the applied magnetic fiels (c) are oppositely oriented with respect to each other withot the application of magnetic field (d) cancel out each other's magnetic moment

41.

The value of magnetic moment is zero in the case of antiferromagnetic substances because the domains ........... (a) get oriented in the direction of the applied magnetic fiels (b) get oriented opposite to the direction of the applied magnetic fiels (c) are oppositely oriented with respect to each other withot the application of magnetic field (d) cancel out each other's magnetic moment

Answer»

The value of magnetic moment is zero in the case of antiferromagnetic substances because the domains ...........

(a) get oriented in the direction of the applied magnetic fiels

(b) get oriented opposite to the direction of the applied magnetic fiels

(c) are oppositely oriented with respect to each other withot the application of magnetic field

(d) cancel out each other's magnetic moment

Discussion

42.	The pair of compounds which cannot exist together in solution is
Answer» The pair of compounds which cannot exist together in solution is

Discussion

43.	The C – H bond distance is longest in
Answer» The C – H bond distance is longest in

Discussion

44.	A compound of A and B crystallizes in a cubic lattice in which A atoms occupy the lattice points at the corners of the cube and two atoms of B occupy the center of each of the cube faces. What is the formula of this compound ?
Answer» A compound of $A$ and $B$ crystallizes in a cubic lattice in which A atoms occupy the lattice points at the corners of the cube and two atoms of $B$ occupy the center of each of the cube faces. What is the formula of this compound ?

Discussion

45.	In which of the following I is more volatile than II?
Answer» In which of the following I is more volatile than II?

Discussion

46.	Carbohydrates contain:
Answer» Carbohydrates contain:

Discussion

47.	10 g of hydrogen and 28 g nitrogen are allowed to react and the compound produced (assume complete forward reaction) is dissolved in one litre of water to produce a basic solution. The molarity of solution is:
Answer» 10 g of hydrogen and 28 g nitrogen are allowed to react and the compound produced (assume complete forward reaction) is dissolved in one litre of water to produce a basic solution. The molarity of solution is:

Discussion

48.	The first member of the ester homologous series is?
Answer» The first member of the ester homologous series is?

Discussion

49.	What is the order of melting point of haloarene when halogen is placed at ortho mera and para
Answer» What is the order of melting point of haloarene when halogen is placed at ortho mera and para

Discussion

50.	Benzene diazonium chloride on reaction with phenol in weakly basic medium gives:
Answer» Benzene diazonium chloride on reaction with phenol in weakly basic medium gives:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Which of the following statements is/are correct?

Which of the following will not be oxidised by O3 ?

ΔfU⊖ of formation of CH4(g) at certain temperature is-393 kJ mol−1. The value of ΔfH⊖ is (a) zero (b) &lt;ΔfU⊖ (c) &gt;ΔfU⊖ (d) equal to ΔfU⊖

Calculate the pH at the equivalence point of the titration between 0.1 M CH3COOH (25 mL) with 0.05 M NaOH. (Given pKa for CH3COOH=4.74; log(3)=0.48).

When 1 mole of a perfect gas is heated by 1 kelvin at constant pressure, the external workdone by the gas is

The IUPAC name of CH2−CH2−CH|CH2|CH3−O||C−O−CH3 is

The increasing order of magnetic moment values of the given compounds is: (I) [Fe(CN)6]4− (II) [Fe(CN)6]3− (III) [Cr(NH3)6]3+ (IV) [Ni(H2O)6]2+

Which of the following curve assures that the metal obtained by carbon reduction is in vapour state

Phosphine (PH3) decomposes to produce P4(g) and H2(g). What would be the change in volume when 100 mL of PH3(g) is completely decomposed?

The energy level diagram for an hydrogen like atom is shown in the figure. The radius of its first Bohr orbit is 0 eV__ n=∞ -6.04 eV___ n=3 -13.6 eV___ n=2 -54.4 eV___ n=1

An organic compound contains C,H and S the minimum molecular weight of the compound containing 10% sulphur is : (atomic weight of S=32 amu)

ABr2−−−→CCl4Bi) alc. KOH−−−−−−−→ii) NaNH2Ci) BH3/THF−−−−−−−−−→ii) H2O2/OH−D D answers positive for Tollens' test, A will be:

What is meant by anhydrous, turbidity and crystalline?

Cyclopentadiene is non-aromatic. Postively charged ion of cyclopentadiene is anti-aromatic whereas negative charged ion of cyclopentadiene is aromatic. Explain.

AlF3 is soluble in HF only in the presence of KF. It is due to the formation of:

What is antimatter? Does antimatter actually exist?

Which of the following compounds will not give benzoic acid with KMnO4/HO−/Heat.

Lithium resembles magnesium in some of its properties. Mention two such properties and give reasons for this resemblance.

What is meant by the stability of a coordination compound in solution? State the factors which govern the stability of complexes.

Consider low spin complex [Co(NH3)6]2+ and [Co(NH3)4]2+. If △t=49△o and difference in crystal field stabilization energy is x3△o between both the complexes then find the value of x

Which element is used to make an explosive called Trinitrotoluene (T.N.T)?

Light is a transverse wave, how can it propagate through vacuum?

A 10 litre box contains O3 and O2 at equilibrium at 2000K. KP=4×1014 atm for 2O3(g)⇌3O2(g) Assume that pO2&gt;&gt;pO3 and if total pressure is 8 atm, then moles of O3 at equilibrium will be: Take √5=2.2, √3=1.7, √2=1.4

For the reaction H2 (g) + I2(g)⇌2HI(g),Koc= 66.9 at 350∘C and Koc= 50.0 at 448 ∘C. The reaction has

For an equilibrium reaction A (g) + B (g)⇌ C (g) + D (g),ΔH = +ve. An increase in temperature would cause

If I have two lone pairs placed at oposite positions in a compound, so will there be any change in the bond angles? if the answer is no then please explain if I have 4 electron lone pair in the equatorial plane in a square bipyramidal geometry so what would be the change in the bond angles?

From the following reaction sequence Cl2 + 2KOH → KCl + KClO + H2O 3KClO → 2KCl + KClO3 4KClO3 → 3KClO4+KCl Calculate the mass of chlorine needed to produce 100g of KClO4

Which of the following has the maximum covalent radii?

It is said that cathode ray particles, when pass through metal, produce heating effect. But how? Please tell me the full process.

C5H11NH2 + O2 -> CO2 + H2O + NO2 ,balance the equation and write the coefficient of O2

Which of the following do not impart colour to the flame?

H - atom in its ground state is excited by means of monochromatic radiation of wavelength 970.6A0 then

Gold crystallises in CCP structure. What is the total number of voids present in 197g of gold.

What is carbide?

how many nearest and next nearest neighbours respectively each potassium has in BCC lattice

Calculate number of atoms present 10g of oxygen in CaCo3

Preparation of sodium hydroxide

Dry cell has a small life time because of the corrosion of Zn container to form .

The pair of compounds which cannot exist together in solution is

The C – H bond distance is longest in

A compound of A and B crystallizes in a cubic lattice in which A atoms occupy the lattice points at the corners of the cube and two atoms of B occupy the center of each of the cube faces. What is the formula of this compound ?

In which of the following I is more volatile than II?

Carbohydrates contain:

10 g of hydrogen and 28 g nitrogen are allowed to react and the compound produced (assume complete forward reaction) is dissolved in one litre of water to produce a basic solution. The molarity of solution is:

The first member of the ester homologous series is?

What is the order of melting point of haloarene when halogen is placed at ortho mera and para

Benzene diazonium chloride on reaction with phenol in weakly basic medium gives:

ΔfU⊖ of formation of CH4(g) at certain temperature is-393 kJ mol−1. The value of ΔfH⊖ is (a) zero (b) <ΔfU⊖ (c) >ΔfU⊖ (d) equal to ΔfU⊖

The energy level diagram for an hydrogen like atom is shown in the figure. The radius of its first Bohr orbit is 0 eV n=∞ -6.04 eV_ n=3 -13.6 eV_ n=2 -54.4 eV_ n=1

A 10 litre box contains O3 and O2 at equilibrium at 2000K. KP=4×1014 atm for 2O3(g)⇌3O2(g) Assume that pO2>>pO3 and if total pressure is 8 atm, then moles of O3 at equilibrium will be: Take √5=2.2, √3=1.7, √2=1.4