46295 + Interview Questions in Chemistry

1.	From the given set of compounds, the number of fluorinating agents is/are: SbF3,SF6,Teflon,F2,Fluorapatite,ClF3,Fluorspar,AsF3,XeF2
Answer» From the given set of compounds, the number of fluorinating agents is/are: $S b F_{3}, S F_{6}, T e f l o n, F_{2}, F l u o r a p a t i t e, C l F_{3}, F l u o r s p a r, A s F_{3}, X e F_{2}$

Discussion

2.	why approximately all the kinetic energy given to alpha particles in alpha decay ?
Answer» why approximately all the kinetic energy given to alpha particles in alpha decay ?

Discussion

3.	P would be:
Answer» P would be:

Discussion

4.	KF combines with HF to form KHF2. The compound contains the species-
Answer» KF combines with HF to form $K H F_{2} .$ The compound contains the species-

Discussion

5.	When one mole of monoatomic ideal gas at temperature T undergoes adiabatic change reversibly, change in volume is from 1 L to 2L, the final temperature in Kelvin would be
Answer» When one mole of monoatomic ideal gas at temperature $T$ undergoes adiabatic change reversibly, change in volume is from $1 L t o 2 L$ , the final temperature in Kelvin would be

Discussion

6.	Planck's constant h, speed of light c and gravitational constant G are used to form a unit of length L and a unit of mass M. Then the correct option(s) is/are
Answer» Planck's constant $h$ , speed of light $c$ and gravitational constant $G$ are used to form a unit of length $L$ and a unit of mass $M$ . Then the correct option(s) is/are

Discussion

7.	Ph−CH2−CH2−CH2−OH PCC−−→
Answer» $Ph - {CH}_{2} - {CH}_{2} - {CH}_{2} - OH PCC - - \to$

Discussion

8.	What is the major compound formed in the following reaction?
Answer» What is the major compound formed in the following reaction?

Discussion

9.	How is sol different from emulsion?
Answer» How is sol different from emulsion?

Discussion

10.	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 700 to 400 torr. Calculate the volume of the gas (at STP) that is adsorbed per gram of the adsorbent under the condition of the experiment. The density of the charcoal compound is 1.5 g cm−3.
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 $27^{\circ} C$ . The pressure of the gas falls from 700 to 400 torr. Calculate the volume of the gas (at STP) that is adsorbed per gram of the adsorbent under the condition of the experiment. The density of the charcoal compound is $1.5 {g cm}^{- 3}$ .

Discussion

11.	A hydrocarbon 'X' on reaction with Br2 in presence of CCl4 decolourises bromine water. Also 'X' reacts with KMnO4 in the presence of an acid to give two moles of the same carboxylic acid. The structure of 'X' is:
Answer» A hydrocarbon 'X' on reaction with $B r_{2}$ in presence of $C C l_{4}$ decolourises bromine water. Also 'X' reacts with $K M n O_{4}$ in the presence of an acid to give two moles of the same carboxylic acid. The structure of 'X' is:

Discussion

12.	KspofAgCl is =2.8×10−10 at 25∘ C. Calculate solubility of AgCl in 0.1 (M) NaCl
Answer» $K_{s p} o f A g C l$ is $= 2.8 \times 10^{- 10}$ at $25^{\circ}$ C. Calculate solubility of AgCl in 0.1 (M) NaCl

Discussion

13.	Determine the heat energy needed to increase the temperature of 5 mol of mercury by 10 K. The value of heat capacity for given amount of mercury is 27.8 JK−1
Answer» Determine the heat energy needed to increase the temperature of $5 m o l$ of mercury by $10 K$ . The value of heat capacity for given amount of mercury is $27.8 J K^{- 1}$

Discussion

14.	In which of the following orbitals, nodal plane is absent?
Answer» In which of the following orbitals, nodal plane is absent?

Discussion

15.	A group of students left a mixture of calcium hydroxide and water to equilibrate at 20∘C. They titrated the resulting saturated solution and found that if contained 0.040 mol/l of OH− ions. The solubility product constant Ksp(Ca(OH)2) at this temperature is therefore:
Answer» A group of students left a mixture of calcium hydroxide and water to equilibrate at $20^{\circ} C$ . They titrated the resulting saturated solution and found that if contained $0.040 mol/l$ of $O H^{-}$ ions. The solubility product constant $K_{s p} (C a (O H)_{2})$ at this temperature is therefore:

Discussion

16.	Magnitude of difference between △H and △U in kJ for the combustion of benzene at 300 K is : C6H6(l)+152O2(g)→6CO2(g)+3H2O(l)
Answer» Magnitude of difference between $△ H$ and $△ U$ in $k J$ for the combustion of benzene at 300 K is : $C_{6} H_{6} (l) + \frac{15}{2} O_{2} (g) \to 6 C O_{2} (g) + 3 H_{2} O (l)$

Discussion

17.	In what volume ratio NH4Cl and NH4OH having 1M concentration should be mixed to get a buffer solution of pH=9.26 (pKb of NH4OH = 4.74?
Answer» In what volume ratio NH4Cl and NH4OH having 1M concentration should be mixed to get a buffer solution of pH=9.26 (pK_b of NH4OH = 4.74?

Discussion

18.	Why do end centred lattices exist only in orthorhombic and monoclinic bravais lattices
Answer» Why do end centred lattices exist only in orthorhombic and monoclinic bravais lattices

Discussion

19.	An ionic solid A+ B- crystallizes as a bcc structure. The distance between cation and anion in the lattice is 150pm, what is the radius of the anion?
Answer» An ionic solid A⁺B^- crystallizes as a bcc structure. The distance between cation and anion in the lattice is 150pm, what is the radius of the anion?

Discussion

20.	Which noble gas is more soluble in water?
Answer» Which noble gas is more soluble in water?

Discussion

21.	The low density polythene LDP obtained through free radical addition and H atom abstraction has highly branched structure. Can you please make me explain :- what last line H- atom abstraction...... Structure, Mean with branching I couldn't link it with branching.
Answer» The low density polythene LDP obtained through free radical addition and H atom abstraction has highly branched structure. Can you please make me explain :- what last line H- atom abstraction...... Structure, Mean with branching I couldn't link it with branching.

21.

The low density polythene LDP obtained through free radical addition and H atom abstraction has highly branched structure. Can you please make me explain :- what last line H- atom abstraction...... Structure, Mean with branching I couldn't link it with branching.

Answer»

The low density polythene LDP obtained through free radical addition and H atom abstraction has highly branched structure.

Can you please make me explain :- what last line H- atom abstraction...... Structure, Mean with branching I couldn't link it with branching.

Discussion

22.	C2H5OH and CH3−O−CH3 have same molecular weight. But ethyl alcohol boils at higher temp. why?
Answer» $C_{2} H_{5} O H$ and $C H_{3} - O - C H_{3}$ have same molecular weight. But ethyl alcohol boils at higher temp. why?

Discussion

23.	What is homonuclear atomic orbital?
Answer» What is homonuclear atomic orbital?

Discussion

24.	Why are particles of matter always moving and never at rest
Answer» Why are particles of matter always moving and never at rest

Discussion

25.	What is Alkaloids? How is it different from alkaline?
Answer» What is Alkaloids? How is it different from alkaline?

Discussion

26.	600 ml of a mixture of O3 and O2 weighs 1g at NTP. Calculate the volume of ozone in the mixture
Answer» 600 ml of a mixture of O3 and O2 weighs 1g at NTP. Calculate the volume of ozone in the mixture

Discussion

27.	Why is aqueous solution of alum acidic?
Answer» Why is aqueous solution of alum acidic?

Discussion

28.	Raoult's law becomes a special case of Henry's law when
Answer» Raoult's law becomes a special case of Henry's law when

Discussion

29.	The name rare earths is used for
Answer» The name rare earths is used for

Discussion

30.	Among halogens, the correct order of amount of energy released in electron gain (electron gain enthalpy ) is (a) F > Cl > Br > I (b) F < Cl < Br < I (c) F < Cl > Br > I (d) F < Cl < Br < I
Answer» Among halogens, the correct order of amount of energy released in electron gain (electron gain enthalpy ) is (a) F > Cl > Br > I (b) F < Cl < Br < I (c) F < Cl > Br > I (d) F < Cl < Br < I

Discussion

31.	In the system AB(s)⇌A(g)+B(g) doubling the quantity of AB (s) would -
Answer» In the system $A B (s) ⇌ A (g) + B (g)$ doubling the quantity of AB (s) would -

Discussion

32.	n-Propyl bromide reacts with ethanolic KOH to form:
Answer» n-Propyl bromide reacts with ethanolic KOH to form:

Discussion

33.	Which of the following represents the expression for the 3/4th life of a first order reaction?
Answer» Which of the following represents the expression for the 3/4^th life of a first order reaction?

Discussion

34.	In K4[Fe(CN)6], Fe is in the form of
Answer» In $K_{4} [F e (C N)_{6}]$ , Fe is in the form of

Discussion

35.	XeF4 is formed by Xe in its
Answer» $X e F_{4}$ is formed by Xe in its

Discussion

36.	How to compare the acidic strength by inductive and mesomeric effect?
Answer» How to compare the acidic strength by inductive and mesomeric effect?

Discussion

37.	Mark out the molecule/ions having linear structures
Answer» Mark out the molecule/ions having linear structures

Discussion

38.	Amount of 53I128(t12=25 min)left after 75 minutes is
Answer» Amount of $_{53} I^{128} (t_{\frac{1}{2}} = 25 m i n) l e f t$ after 75 minutes is

Discussion

39.	Column 1, 2 and 3 contains symbol of the element atomic number and name respectively. Column 1 Column 2 Column 3(I)Lr(i)23(P)Zinc(II)Mn(ii)103(Q)Vanadium(III)Zn(iii)25(R)Unniltrium (IUPAC name)(IV)V(iv)30(S)Manganese The correct set which corresponds to the highest metallic nature of d-block elements:
Answer» Column 1, 2 and 3 contains symbol of the element atomic number and name respectively. $\begin{matrix} C o l u m n 1 & C o l u m n 2 & C o l u m n 3 (I) & L r & (i) & 23 & (P) & Z i n c (I I) & M n & (i i) & 103 & (Q) & V a n a d i u m (I I I) & Z n & (i i i) & 25 & (R) & U n n i l t r i u m (I U P A C n a m e) (I V) & V & (i v) & 30 & (S) & M a n g a n e s e \end{matrix}$ The correct set which corresponds to the highest metallic nature of d-block elements:

Discussion

40.	What is correct order of stability of the following carbocations: A. +CH2−CH3 B. +CH2−CH2Cl C. +CH2−CHCl2 D. +CH2−CCl3
Answer» What is correct order of stability of the following carbocations: A. $+ C H_{2} - C H_{3}$ B. $+ C H_{2} - C H_{2} C l$ C. $+ C H_{2} - C H C l_{2}$ D. $+ C H_{2} - C C l_{3}$

Discussion

41.	Which of the following statement(s) is/are correct?
Answer» Which of the following statement(s) is/are correct?

Discussion

42.	If a non-volatile solute (urea) needs to be dissolved in 100 g of water in order to decrease the vapour pressure of water by 25%, then what will be the molality of solution?
Answer» If a non-volatile solute (urea) needs to be dissolved in $100 g$ of water in order to decrease the vapour pressure of water by $25 %$ , then what will be the molality of solution?

Discussion

43.	In a 50 mL solution of H2O2 an excess of KI and dilute H2SO4 were added. The I2 liberated required 20 mL of 0.1N Na2S2O3 for complete reaction. Calculate the strength of H2O2 in grams per litre.
Answer» In a $50 m L$ solution of $H_{2} O_{2}$ an excess of $K I$ and dilute $H_{2} S O_{4}$ were added. The $I_{2}$ liberated required $20 m L$ of $0.1 N N a_{2} S_{2} O_{3}$ for complete reaction. Calculate the strength of $H_{2} O_{2}$ in grams per litre.

Discussion

44.	Do law of triads applicable to C,N,O ?
Answer» Do law of triads applicable to C,N,O ?

Discussion

45.	Hydrogen peroxide in its reaction with KIO4 and NH2OH respectively, is acting as:
Answer» Hydrogen peroxide in its reaction with $K I O_{4}$ and $N H_{2} O H$ respectively, is acting as:

Discussion

46.	For the reaction A+2B ⇌ C, the expression for equilibrium constant is
Answer» For the reaction A+2B $⇌$ C, the expression for equilibrium constant is

46.

For the reaction A+2B ⇌ C, the expression for equilibrium constant is

Answer»

For the reaction A+2B $⇌$ C, the expression for equilibrium constant is

Discussion

47.	A wire forming a loop is dipped into soap solution and taken out so that a film of soap solution is formed. A loop of 6.28 cm long thread is gently put on the film is pricked with a needle inside the loop. The thread loop takes the shape of a circle. Find the tension in the thread. Surface tension of soap solution = 0.030Nm−1.
Answer» A wire forming a loop is dipped into soap solution and taken out so that a film of soap solution is formed. A loop of 6.28 cm long thread is gently put on the film is pricked with a needle inside the loop. The thread loop takes the shape of a circle. Find the tension in the thread. Surface tension of soap solution = $0.030 N m^{- 1}$ .

Discussion

48.	For an equilibrium H2O(s)⇌H2O(l), which of the following statements is true?
Answer» For an equilibrium $H_{2} O (s) ⇌ H_{2} O (l)$ , which of the following statements is true?

48.

For an equilibrium H2O(s)⇌H2O(l), which of the following statements is true?

Answer»

For an equilibrium $H_{2} O (s) ⇌ H_{2} O (l)$ , which of the following statements is true?

Discussion

49.	The best method of prepare cyclohexene from cyclohexanol is by using
Answer» The best method of prepare cyclohexene from cyclohexanol is by using

Discussion

50.	Amonium salts on reaction with sodium hydroxide given NH4Cl + NaOH → A–– + NaCl + H2O A is
Answer» Amonium salts on reaction with sodium hydroxide given $N H_{4} C l + N a O H \to A - - + N a C l + H_{2} O A$ is

50.

Amonium salts on reaction with sodium hydroxide given NH4Cl + NaOH → A–– + NaCl + H2O A is

Answer»

Amonium salts on reaction with sodium hydroxide given

$N H_{4} C l + N a O H \to A - - + N a C l + H_{2} O A$ is

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

From the given set of compounds, the number of fluorinating agents is/are: SbF3,SF6,Teflon,F2,Fluorapatite,ClF3,Fluorspar,AsF3,XeF2

why approximately all the kinetic energy given to alpha particles in alpha decay ?

P would be:

KF combines with HF to form KHF2. The compound contains the species-

When one mole of monoatomic ideal gas at temperature T undergoes adiabatic change reversibly, change in volume is from 1 L to 2L, the final temperature in Kelvin would be

Planck's constant h, speed of light c and gravitational constant G are used to form a unit of length L and a unit of mass M. Then the correct option(s) is/are

Ph−CH2−CH2−CH2−OH PCC−−→

What is the major compound formed in the following reaction?

How is sol different from emulsion?

A hydrocarbon 'X' on reaction with Br2 in presence of CCl4 decolourises bromine water. Also 'X' reacts with KMnO4 in the presence of an acid to give two moles of the same carboxylic acid. The structure of 'X' is:

KspofAgCl is =2.8×10−10 at 25∘ C. Calculate solubility of AgCl in 0.1 (M) NaCl

Determine the heat energy needed to increase the temperature of 5 mol of mercury by 10 K. The value of heat capacity for given amount of mercury is 27.8 JK−1

In which of the following orbitals, nodal plane is absent?

A group of students left a mixture of calcium hydroxide and water to equilibrate at 20∘C. They titrated the resulting saturated solution and found that if contained 0.040 mol/l of OH− ions. The solubility product constant Ksp(Ca(OH)2) at this temperature is therefore:

Magnitude of difference between △H and △U in kJ for the combustion of benzene at 300 K is : C6H6(l)+152O2(g)→6CO2(g)+3H2O(l)

In what volume ratio NH4Cl and NH4OH having 1M concentration should be mixed to get a buffer solution of pH=9.26 (pKb of NH4OH = 4.74?

Why do end centred lattices exist only in orthorhombic and monoclinic bravais lattices

An ionic solid A+ B- crystallizes as a bcc structure. The distance between cation and anion in the lattice is 150pm, what is the radius of the anion?

Which noble gas is more soluble in water?

The low density polythene LDP obtained through free radical addition and H atom abstraction has highly branched structure. Can you please make me explain :- what last line H- atom abstraction...... Structure, Mean with branching I couldn't link it with branching.

C2H5OH and CH3−O−CH3 have same molecular weight. But ethyl alcohol boils at higher temp. why?

What is homonuclear atomic orbital?

Why are particles of matter always moving and never at rest

What is Alkaloids? How is it different from alkaline?

600 ml of a mixture of O3 and O2 weighs 1g at NTP. Calculate the volume of ozone in the mixture

Why is aqueous solution of alum acidic?

Raoult's law becomes a special case of Henry's law when

The name rare earths is used for

Among halogens, the correct order of amount of energy released in electron gain (electron gain enthalpy ) is (a) F &gt; Cl &gt; Br &gt; I (b) F &lt; Cl &lt; Br &lt; I (c) F &lt; Cl &gt; Br &gt; I (d) F &lt; Cl &lt; Br &lt; I

In the system AB(s)⇌A(g)+B(g) doubling the quantity of AB (s) would -

n-Propyl bromide reacts with ethanolic KOH to form:

Which of the following represents the expression for the 3/4th life of a first order reaction?

In K4[Fe(CN)6], Fe is in the form of

XeF4 is formed by Xe in its

How to compare the acidic strength by inductive and mesomeric effect?

Mark out the molecule/ions having linear structures

Amount of 53I128(t12=25 min)left after 75 minutes is

What is correct order of stability of the following carbocations: A. +CH2−CH3 B. +CH2−CH2Cl C. +CH2−CHCl2 D. +CH2−CCl3

Which of the following statement(s) is/are correct?

If a non-volatile solute (urea) needs to be dissolved in 100 g of water in order to decrease the vapour pressure of water by 25%, then what will be the molality of solution?

In a 50 mL solution of H2O2 an excess of KI and dilute H2SO4 were added. The I2 liberated required 20 mL of 0.1N Na2S2O3 for complete reaction. Calculate the strength of H2O2 in grams per litre.

Do law of triads applicable to C,N,O ?

Hydrogen peroxide in its reaction with KIO4 and NH2OH respectively, is acting as:

For the reaction A+2B ⇌ C, the expression for equilibrium constant is

For an equilibrium H2O(s)⇌H2O(l), which of the following statements is true?

The best method of prepare cyclohexene from cyclohexanol is by using

Amonium salts on reaction with sodium hydroxide given NH4Cl + NaOH → A–– + NaCl + H2O A is

Among halogens, the correct order of amount of energy released in electron gain (electron gain enthalpy ) is (a) F > Cl > Br > I (b) F < Cl < Br < I (c) F < Cl > Br > I (d) F < Cl < Br < I