46295 + Interview Questions in Chemistry

1.	Consider the following complex: [M(NH3)4(H2O)(Cl)] Find the total number of stereoisomers-
Answer» Consider the following complex: $[M (N H_{3})_{4} (H_{2} O) (C l)]$ Find the total number of stereoisomers-

Discussion

2.	If the sum of the mole fraction of NaOH in its aqueous solution and the mole fraction of H2O in an another aqueous solution of KOH is equal to one, find the molality of KOH solution. The molality of NaOH solution is 'm'. Report your answer as 'Y' where Y = (molality of KOH solution)(molality of NaOH solution)
Answer» If the sum of the mole fraction of $N a O H$ in its aqueous solution and the mole fraction of $H_{2} O$ in an another aqueous solution of $K O H$ is equal to one, find the molality of $K O H$ solution. The molality of $N a O H$ solution is 'm'. Report your answer as 'Y' where Y = $\frac{(m o l a l i t y o f K O H s o l u t i o n)}{(m o l a l i t y o f N a O H s o l u t i o n)}$

Discussion

3.	C2H5OHAl2O3.350∘C−−−−−−−−→XHBr−−−→ Y. The compound 'Y' gives ethene, on treating with
Answer» $C_{2} H_{5} O H A l_{2} O_{3} {.350}^{\circ} C - ------- \to X H B r - -- \to$ Y. The compound 'Y' gives ethene, on treating with

Discussion

4.	What are the raw materials used in solvay's process for the preparation of sodium carbonate?
Answer» What are the raw materials used in solvay's process for the preparation of sodium carbonate?

Discussion

5.	What is the product when urea is reacted with NaOBr ?
Answer» What is the product when urea is reacted with NaOBr ?

Discussion

6.	The pH of 0.1 M solution of the following salts increases in the order
Answer» The pH of 0.1 M solution of the following salts increases in the order

Discussion

7.	The major product (X) of the reactions is:
Answer» The major product (X) of the reactions is:

Discussion

8.	H2SO4 (98 g mol−1) is 98% by mass of solution, if the density is 1.8 g/mL, the molarity is:
Answer» $H_{2} S O_{4} (98 g m o l^{- 1})$ is 98% by mass of solution, if the density is 1.8 g/mL, the molarity is:

Discussion

9.	An unknown compound (P) of molecular formula C10H18O reacts with H2SO4 to form two compound (Q) and (R) of molecular formula C10H16. Both (Q) and (R) react with H2 in presence of Pd−C to form decalin. Ozonolysis of (Q) forms a diketone (S) of molecular formula C10H16O2. Which of the following represents incorrect structure?
Answer» An unknown compound (P) of molecular formula $C_{10} H_{18} O$ reacts with $H_{2} S O_{4}$ to form two compound (Q) and (R) of molecular formula $C_{10} H_{16}$ . Both (Q) and (R) react with $H_{2}$ in presence of $P d - C$ to form decalin. Ozonolysis of (Q) forms a diketone (S) of molecular formula $C_{10} H_{16} O_{2}$ . Which of the following represents incorrect structure?

Discussion

10.	In the ore Bauxite Al2O3.2H2O there are two significant types – Red Bauxite and White Bauxite. Bayer’s process is applicable for __ Bauxite.
Answer» In the ore Bauxite $A l_{2} O_{3} .2 H_{2} O$ there are two significant types – Red Bauxite and White Bauxite. Bayer’s process is applicable for __ Bauxite.

Discussion

11.	(a) Describe the structure and function of t-RNA molecule. Why is it referred to as an adapter molecule? (b) Explain the process of splicing of hn-RNA in a eukaryotic cell. [5]
Answer» (a) Describe the structure and function of t-RNA molecule. Why is it referred to as an adapter molecule? (b) Explain the process of splicing of hn-RNA in a eukaryotic cell. [5]

Discussion

12.	In aqueous solution of H3PO4 total number of chemically distinct species present is
Answer» In aqueous solution of $H_{3} P O_{4}$ total number of chemically distinct species present is

Discussion

13.	How to name ionic compounds and how to make formula from it's name.
Answer» How to name ionic compounds and how to make formula from it's name.

Discussion

14.	In a lab investigation designed to demonstrate one aspect of photosynthesis, three test tubes were treated as shown above. The test tubes were then placed under a bright lamp for 24 hours. Which of the following is the best explanation for the observed color change in tube 2 ?
Answer» In a lab investigation designed to demonstrate one aspect of photosynthesis, three test tubes were treated as shown above. The test tubes were then placed under a bright lamp for 24 hours. Which of the following is the best explanation for the observed color change in tube 2 ?

Discussion

15.	The de-Brogile wavelength of an electron moving in a circular orbit is λ. The minimum radius of orbit is
Answer» The de-Brogile wavelength of an electron moving in a circular orbit is $λ$ . The minimum radius of orbit is

Discussion

16.	Pressure of 10 moles of an ideal gas is changed from 2 atm to 1 atm against constant external pressure without change in temperature. If surrounding temperature (300 K) and pressure (1 atm) always remains constant then calculate total entropy change (ΔSsystem + ΔSsurrounding) for given process. [Given: ℓn2 = 0.70 amd R=8.0 J/mol/K]
Answer» Pressure of 10 moles of an ideal gas is changed from 2 atm to 1 atm against constant external pressure without change in temperature. If surrounding temperature (300 K) and pressure (1 atm) always remains constant then calculate total entropy change ( $Δ S_{s y s t e m} + Δ S_{s u r r o u n d i n g})$ for given process. [Given: ℓn2 = 0.70 amd R=8.0 J/mol/K]

Discussion

17.	What happens when an alkyl halide reacts with AgNO2 and the product is reduced?
Answer» What happens when an alkyl halide reacts with AgNO2 and the product is reduced?

Discussion

18.	a volume of 1000 ml of a liquid contained in an isolated container at a pressure of 1bar. the pressure is steeply increases to 100bar by which the volume is decresed by 1ml .the change in enthalpy,of the liquid is ( answer is abcd, where a=1, if delta H= positive and a=2 if delta H = negative) bcd is the magnitude of delta H , in joules ans =1990 how ?
Answer» a volume of 1000 ml of a liquid contained in an isolated container at a pressure of 1bar. the pressure is steeply increases to 100bar by which the volume is decresed by 1ml .the change in enthalpy,of the liquid is ( answer is abcd, where a=1, if delta H= positive and a=2 if delta H = negative) bcd is the magnitude of delta H , in joules ans =1990 how ?

18.

a volume of 1000 ml of a liquid contained in an isolated container at a pressure of 1bar. the pressure is steeply increases to 100bar by which the volume is decresed by 1ml .the change in enthalpy,of the liquid is ( answer is abcd, where a=1, if delta H= positive and a=2 if delta H = negative) bcd is the magnitude of delta H , in joules ans =1990 how ?

Answer»

a volume of 1000 ml of a liquid contained in an isolated container at a pressure of 1bar. the pressure is steeply increases to 100bar by which the volume is decresed by 1ml .the change in enthalpy,of the liquid is

( answer is abcd, where a=1, if delta H= positive

and a=2 if delta H = negative)

bcd is the magnitude of delta H , in joules

ans =1990

how ?

Discussion

19.	A reactant (A) forms two products. Ak1−→B, Activation energy Ea1 Ak2−→C, Activation energy Ea2 If Ea2=2Ea1, then k1 and k2 are related as:
Answer» A reactant (A) forms two products. $A k_{1} - \to B$ , Activation energy $E a_{1}$ $A k_{2} - \to C$ , Activation energy $E a_{2}$ If $E a_{2} = 2 E a_{1}$ , then $k_{1}$ and $k_{2}$ are related as:

Discussion

20.	The distance between an octahedral and tetrahedral void in bcc lattice will be (1)sqr root 3 a (2)sqr root 3a/2 (3)sqr root3a/3 (4)sqr root 3a/ 4
Answer» The distance between an octahedral and tetrahedral void in bcc lattice will be (1)sqr root 3 a (2)sqr root 3a/2 (3)sqr root3a/3 (4)sqr root 3a/ 4

Discussion

21.	Calculate the uncertainty in the position (Δx) of an electron if Δv is 0.1%. Take the velocity of electron =2.2×106 ms−1 and mass of electron as 9.108×10−31kg.
Answer» Calculate the uncertainty in the position ( $Δ x)$ of an electron if $Δ v i s 0.1 %$ . Take the velocity of electron $= 2.2 \times 10^{6} m s^{- 1}$ and mass of electron as $9.108 \times 10^{- 31} k g$ .

Discussion

22.	The substance which cannot be used for preparing H2O2 solution is
Answer» The substance which cannot be used for preparing $H_{2}$ $O_{2}$ solution is

Discussion

23.	Which one of the following has the highest electronegativity
Answer» Which one of the following has the highest electronegativity

Discussion

24.	The oxidation number of an element in its free state is always
Answer» The oxidation number of an element in its free state is always

Discussion

25.	The d-orbital which has the maximum electronic probability density along two axes is:
Answer» The d-orbital which has the maximum electronic probability density along two axes is:

Discussion

26.	The effective number of atoms present in a simple cubic unit cell is
Answer» The effective number of atoms present in a simple cubic unit cell is

Discussion

27.	Mtch the correct atomic radius with the element. ElementAtomic radius(pm)Be74C88O111B77N66
Answer» Mtch the correct atomic radius with the element. $\begin{matrix} E l e m e n t & A t o m i c r a d i u s (p m) B e & 74 C & 88 O & 111 B & 77 N & 66 \end{matrix}$

Discussion

28.	In the cubic close packing, the unit cell has (a) 4 tetrahedral voids each of which is shared by four adjacent unit cell (b) 4 tetrahedral voids within the unit cell (c) 8 tetrahedral voids each of which is shared by four adjacent unit cells (d) 8 tetrahedral voids within the unit cells
Answer» In the cubic close packing, the unit cell has (a) 4 tetrahedral voids each of which is shared by four adjacent unit cell (b) 4 tetrahedral voids within the unit cell (c) 8 tetrahedral voids each of which is shared by four adjacent unit cells (d) 8 tetrahedral voids within the unit cells

28.

In the cubic close packing, the unit cell has (a) 4 tetrahedral voids each of which is shared by four adjacent unit cell (b) 4 tetrahedral voids within the unit cell (c) 8 tetrahedral voids each of which is shared by four adjacent unit cells (d) 8 tetrahedral voids within the unit cells

Answer»

In the cubic close packing, the unit cell has

(a) 4 tetrahedral voids each of which is shared by four adjacent unit cell

(b) 4 tetrahedral voids within the unit cell

(c) 8 tetrahedral voids each of which is shared by four adjacent unit cells

(d) 8 tetrahedral voids within the unit cells

Discussion

29.	A solution in which no more solute can be dissolved at a given temperature and pressure is called a saturated solution. At saturated solution stage equilibrium gets established among which two processes?
Answer» A solution in which no more solute can be dissolved at a given temperature and pressure is called a saturated solution. At saturated solution stage equilibrium gets established among which two processes?

Discussion

30.	Aromatic hydrocarbons are also known as:
Answer» Aromatic hydrocarbons are also known as:

Discussion

31.	Consider the following equilibria at 25∘C,2NO(g)⇌N2(g)+O2(g);K1=4×1030and NO(g)+12Br2(g)⇌NOBr(g);K2=1.4 mol−12L12. The value of K_C for the reaction (at same temperature) 12N2(g)+12O2(g)+12Br2(g)⇌NOBr(g) is :
Answer» Consider the following equilibria at $25^{\circ} C, 2 N O_{(g)} ⇌ N_{2 (g)} + O_{2 (g)}; K_{1} = 4 \times 10^{30} a n d N O_{(g)} + \frac{1}{2} B r_{2 (g)} ⇌ N O B r_{(g)}; K_{2} = 1.4 m o l^{- \frac{1}{2}} L^{\frac{1}{2}} .$ The value of K_C for the reaction (at same temperature) $\frac{1}{2} N_{2 (g)} + \frac{1}{2} O_{2 (g)} + \frac{1}{2} B r_{2 (g)} ⇌ N O B r_{(g)}$ is :

Discussion

32.	An element X occurs in short period having configuration ns2np1. The formula and nature of its oxide is
Answer» An element X occurs in short period having configuration $n s^{2} n p^{1}$ . The formula and nature of its oxide is

Discussion

33.	In a △ABC,a=a1=2,b=a2,c=a3 such that ap+1=5p32−pap(22−p−4p−25pap), where p=1,2 and r1,r2,r3 are ex-radii, then r3r1 is
Answer» In a $△ A B C, a = a_{1} = 2, b = a_{2}, c = a_{3}$ such that $a_{p + 1} = \frac{5^{p}}{3^{2 - p}} a^{p} (2^{2 - p} - \frac{4 p - 2}{5^{p}} a^{p}),$ where $p = 1, 2$ and $r_{1}, r_{2}, r_{3}$ are ex-radii, then $\frac{r_{3}}{r_{1}}$ is

Discussion

34.	Which of the following molecule(s) is/are having a see - saw geometry?
Answer» Which of the following molecule(s) is/are having a see - saw geometry?

Discussion

35.	A. H2 1. 2 B. N2 2. 1 C. O2 3. 3 D.H2− 4. 0.5 The correct match of bond order is
Answer» A. H $_{2}$ 1. 2 B. N $_{2}$ 2. 1 C. O $_{2}$ 3. 3 D.H $_{2}$ $^{-}$ 4. 0.5 The correct match of bond order is

35.

A. H2 1. 2 B. N2 2. 1 C. O2 3. 3 D.H2− 4. 0.5 The correct match of bond order is

Answer»

A. H $_{2}$ 1. 2

B. N $_{2}$ 2. 1

C. O $_{2}$ 3. 3

D.H $_{2}$ $^{-}$ 4. 0.5

The correct match of bond order is

Discussion

36.	A bulb emits light of λ=4500 oA. The bulb is rated as 150 watt and 8% of the energy is emitted as light. How many photons are emitted by the bulb per second?
Answer» A bulb emits light of $λ = 4500 o A$ . The bulb is rated as 150 watt and 8% of the energy is emitted as light. How many photons are emitted by the bulb per second?

Discussion

37.	In a hydrogen oxygen fuel cell, electricity is produced. In this process H2(g) is oxidised at anode and O2(g) reduced at cathode. Given : Cathode: O2(g)+2H2O(l)+4e−→4OH−(aq) Anode : H2(g)+2OH−(aq)→2H2O(l)+2e− 4.48 L of H2 at 1 atm and 273 K is oxidised in 9650 sec. The mass of water produced is (in grams):
Answer» In a hydrogen oxygen fuel cell, electricity is produced. In this process $H_{2} (g)$ is oxidised at anode and $O_{2} (g)$ reduced at cathode. Given : Cathode: $O_{2} (g) + 2 H_{2} O (l) + 4 e^{-} \to 4 O H^{-} (a q)$ Anode : $H_{2} (g) + 2 O H^{-} (a q) \to 2 H_{2} O (l) + 2 e^{-}$ $4.48 L$ of $H_{2}$ at $1 atm$ and $273 K$ is oxidised in $9650 sec$ . The mass of water produced is (in grams):

Discussion

38.	Which of the following reactions is shown by alkynes?
Answer» Which of the following reactions is shown by alkynes?

Discussion

39.	Which of the following expressions represents the spectrum of Balmer series (If n is the principal quantum number of the higher energy level) in a hydrogen atom?
Answer» Which of the following expressions represents the spectrum of Balmer series (If n is the principal quantum number of the higher energy level) in a hydrogen atom?

Discussion

40.	SCN is
Answer» SCN is

Discussion

41.	Read the following passage and answer the questions at the end of it. Gases tend to behave non-ideally at low temperatures and high pressures, and to explain deviation from ideal behavior two types of corrections-volume correction and pressure correction are introduced. 1.Select the correct statement(S).
Answer» Read the following passage and answer the questions at the end of it. Gases tend to behave non-ideally at low temperatures and high pressures, and to explain deviation from ideal behavior two types of corrections-volume correction and pressure correction are introduced. 1.Select the correct statement(S).

41.

Read the following passage and answer the questions at the end of it. Gases tend to behave non-ideally at low temperatures and high pressures, and to explain deviation from ideal behavior two types of corrections-volume correction and pressure correction are introduced. 1.Select the correct statement(S).

Answer»

Read the following passage and answer the questions at the end of it.

Gases tend to behave non-ideally at low temperatures and high pressures, and to explain deviation from ideal behavior two types of corrections-volume correction and pressure correction are introduced.

1.Select the correct statement(S).

Discussion

42.	The correct order regarding the electronegativity of hybrid orbitals of carbon is?
Answer» The correct order regarding the electronegativity of hybrid orbitals of carbon is?

Discussion

43.	In which of the following reactions, the Kolbe's electrolysis product is incorrectly mentioned?
Answer» In which of the following reactions, the Kolbe's electrolysis product is incorrectly mentioned?

Discussion

44.	Two gaseous equilibria SO2(g) + 0.5O2(g) ⇌ SO3(g) and 2SO3(g) ⇌ 2SO2(g) + O2(g) have equilibrium constants K1 and K2 respectively at 298K. Which of the following relationships between K1 and K2 is correct
Answer» Two gaseous equilibria $S O_{2} (g) + 0.5 O_{2} (g) ⇌ S O_{3} (g)$ and $2 S O_{3} (g) ⇌ 2 S O_{2} (g) + O_{2} (g)$ have equilibrium constants $K_{1}$ and $K_{2}$ respectively at 298K. Which of the following relationships between $K_{1}$ and $K_{2}$ is correct

44.

Two gaseous equilibria SO2(g) + 0.5O2(g) ⇌ SO3(g) and 2SO3(g) ⇌ 2SO2(g) + O2(g) have equilibrium constants K1 and K2 respectively at 298K. Which of the following relationships between K1 and K2 is correct

Answer»

Two gaseous equilibria $S O_{2} (g) + 0.5 O_{2} (g) ⇌ S O_{3} (g)$ and

$2 S O_{3} (g) ⇌ 2 S O_{2} (g) + O_{2} (g)$ have equilibrium constants $K_{1}$ and $K_{2}$ respectively

at 298K. Which of the following relationships between $K_{1}$ and $K_{2}$ is correct

Discussion

45.	Which of the following compound can form hydrogen bonds
Answer» Which of the following compound can form hydrogen bonds

45.

Which of the following compound can form hydrogen bonds

Answer»

Which of the following compound can form hydrogen bonds

Discussion

46.	The number of unpaired electrons in the Fe2+ ion is
Answer» The number of unpaired electrons in the $F e^{2 +}$ ion is

46.

The number of unpaired electrons in the Fe2+ ion is

Answer»

The number of unpaired electrons in the $F e^{2 +}$ ion is

Discussion

47.	Chlorination of Toluene in the presence of light and heat followed by treatment with aqueous sodium hydroxide gives
Answer» Chlorination of Toluene in the presence of light and heat followed by treatment with aqueous sodium hydroxide gives

Discussion

48.	Be and Al exhibit diagonal relationship. Which of the following statement/s about them is/are false? 1. Both react with HCl to liberate H2 2. They are made passive by HNO3 3. Their carbides give acetylene on treatment with water. 4. Their oxides are amphoteric.
Answer» Be and Al exhibit diagonal relationship. Which of the following statement/s about them is/are false? 1. Both react with HCl to liberate $H_{2}$ 2. They are made passive by $H N O_{3}$ 3. Their carbides give acetylene on treatment with water. 4. Their oxides are amphoteric.

Discussion

49.	The difference in angular momentum associated with an electron in two successive orbits of Hydrogen atom is:
Answer» The difference in angular momentum associated with an electron in two successive orbits of Hydrogen atom is:

Discussion

50.	Melting point of calcium halides decreases in the order-
Answer» Melting point of calcium halides decreases in the order-

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Consider the following complex: [M(NH3)4(H2O)(Cl)] Find the total number of stereoisomers-

C2H5OHAl2O3.350∘C−−−−−−−−→XHBr−−−→ Y. The compound 'Y' gives ethene, on treating with

What are the raw materials used in solvay's process for the preparation of sodium carbonate?

What is the product when urea is reacted with NaOBr ?

The pH of 0.1 M solution of the following salts increases in the order

The major product (X) of the reactions is:

H2SO4 (98 g mol−1) is 98% by mass of solution, if the density is 1.8 g/mL, the molarity is:

In the ore Bauxite Al2O3.2H2O there are two significant types – Red Bauxite and White Bauxite. Bayer’s process is applicable for __ Bauxite.

(a) Describe the structure and function of t-RNA molecule. Why is it referred to as an adapter molecule? (b) Explain the process of splicing of hn-RNA in a eukaryotic cell. [5]

In aqueous solution of H3PO4 total number of chemically distinct species present is

How to name ionic compounds and how to make formula from it's name.

In a lab investigation designed to demonstrate one aspect of photosynthesis, three test tubes were treated as shown above. The test tubes were then placed under a bright lamp for 24 hours. Which of the following is the best explanation for the observed color change in tube 2 ?

The de-Brogile wavelength of an electron moving in a circular orbit is λ. The minimum radius of orbit is

What happens when an alkyl halide reacts with AgNO2 and the product is reduced?

A reactant (A) forms two products. Ak1−→B, Activation energy Ea1 Ak2−→C, Activation energy Ea2 If Ea2=2Ea1, then k1 and k2 are related as:

The distance between an octahedral and tetrahedral void in bcc lattice will be (1)sqr root 3 a (2)sqr root 3a/2 (3)sqr root3a/3 (4)sqr root 3a/ 4

Calculate the uncertainty in the position (Δx) of an electron if Δv is 0.1%. Take the velocity of electron =2.2×106 ms−1 and mass of electron as 9.108×10−31kg.

The substance which cannot be used for preparing H2O2 solution is

Which one of the following has the highest electronegativity

The oxidation number of an element in its free state is always

The d-orbital which has the maximum electronic probability density along two axes is:

The effective number of atoms present in a simple cubic unit cell is

Mtch the correct atomic radius with the element. ElementAtomic radius(pm)Be74C88O111B77N66

In the cubic close packing, the unit cell has (a) 4 tetrahedral voids each of which is shared by four adjacent unit cell (b) 4 tetrahedral voids within the unit cell (c) 8 tetrahedral voids each of which is shared by four adjacent unit cells (d) 8 tetrahedral voids within the unit cells

A solution in which no more solute can be dissolved at a given temperature and pressure is called a saturated solution. At saturated solution stage equilibrium gets established among which two processes?

Aromatic hydrocarbons are also known as:

Consider the following equilibria at 25∘C,2NO(g)⇌N2(g)+O2(g);K1=4×1030and NO(g)+12Br2(g)⇌NOBr(g);K2=1.4 mol−12L12. The value of K_C for the reaction (at same temperature) 12N2(g)+12O2(g)+12Br2(g)⇌NOBr(g) is :

An element X occurs in short period having configuration ns2np1. The formula and nature of its oxide is

In a △ABC,a=a1=2,b=a2,c=a3 such that ap+1=5p32−pap(22−p−4p−25pap), where p=1,2 and r1,r2,r3 are ex-radii, then r3r1 is

Which of the following molecule(s) is/are having a see - saw geometry?

A. H2 1. 2 B. N2 2. 1 C. O2 3. 3 D.H2− 4. 0.5 The correct match of bond order is

A bulb emits light of λ=4500 oA. The bulb is rated as 150 watt and 8% of the energy is emitted as light. How many photons are emitted by the bulb per second?

Which of the following reactions is shown by alkynes?

Which of the following expressions represents the spectrum of Balmer series (If n is the principal quantum number of the higher energy level) in a hydrogen atom?

SCN is

The correct order regarding the electronegativity of hybrid orbitals of carbon is?

In which of the following reactions, the Kolbe's electrolysis product is incorrectly mentioned?

Two gaseous equilibria SO2(g) + 0.5O2(g) ⇌ SO3(g) and 2SO3(g) ⇌ 2SO2(g) + O2(g) have equilibrium constants K1 and K2 respectively at 298K. Which of the following relationships between K1 and K2 is correct

Which of the following compound can form hydrogen bonds

The number of unpaired electrons in the Fe2+ ion is

Chlorination of Toluene in the presence of light and heat followed by treatment with aqueous sodium hydroxide gives

Be and Al exhibit diagonal relationship. Which of the following statement/s about them is/are false? 1. Both react with HCl to liberate H2 2. They are made passive by HNO3 3. Their carbides give acetylene on treatment with water. 4. Their oxides are amphoteric.

The difference in angular momentum associated with an electron in two successive orbits of Hydrogen atom is:

Melting point of calcium halides decreases in the order-