46295 + Interview Questions in Chemistry

1.	Prove the identity:sin2 Acos2 A+cos2 Asin2 A=1sin2 A cos2 A−2 [4 MARKS]
Answer» Prove the identity: $\frac{s i n^{2} A}{c o s^{2} A} + \frac{c o s^{2} A}{s i n^{2} A} = \frac{1}{s i n^{2} A c o s^{2} A} - 2$ [4 MARKS]

Discussion

2.	Three immiscible liquids of densities d1>d2>d3 and refractive indices μ1>μ2>μ3 are put in a beaker .The height of each liquid column is h/3.A dot is made at the bottom of the beaker.For near normal vision,find the apparent depth of the dot.
Answer» Three immiscible liquids of densities d1>d2>d3 and refractive indices μ1>μ2>μ3 are put in a beaker .The height of each liquid column is h/3.A dot is made at the bottom of the beaker.For near normal vision,find the apparent depth of the dot.

Discussion

3.	Is the following compound optically active:Di-sec-butyl ketone?
Answer» Is the following compound optically active: Di-sec-butyl ketone?

Discussion

4.	To a weighed, clean and dry 1.0 L volumetric flask some pure NH4CI is added and the flask is reweighed. Then distilled water is added to dissolve NH4CI and finally enough water is added, with stirring, to bring the solution to the 1 L mark. The flask is reweighed. Data is given below : Mass of clean and dry 1 Lflask:224.3 g. Mass of flask plus NH4CI:274.3 g Mass of flask plus NH4CI plus water:1224.3 g. w/w of NH4CI in solution is X. The value of X is
Answer» To a weighed, clean and dry $1.0 L$ volumetric flask some pure $N H_{4} C I$ is added and the flask is reweighed. Then distilled water is added to dissolve $N H_{4} C I$ and finally enough water is added, with stirring, to bring the solution to the $1 L m a r k$ . The flask is reweighed. Data is given below : Mass of clean and dry $1 L f l a s k : 224.3 g .$ Mass of flask plus $N H_{4} C I : 274.3 g$ Mass of flask plus $N H_{4} C I p l u s w a t e r : 1224.3 g .$ $w / w o f N H_{4} C I$ in solution is $X$ . The value of $X$ is

Discussion

5.	51. Explain Lewis representation of molecules
Answer» 51. Explain Lewis representation of molecules

Discussion

6.	The order of polarity of NH3, NF3 and BF3 is
Answer» The order of polarity of $N H_{3}, N F_{3}$ and $B F_{3}$ is

Discussion

7.	What are the properties of electrons
Answer» What are the properties of electrons

Discussion

8.	Which of the following compounds does not contain a multiple bond?
Answer» Which of the following compounds does not contain a multiple bond?

Discussion

9.	When 15 g of a mixture of NaCI and Na,CO, is heated with dilute HCI, 2.5 g of CO2 is evolvedat NTP. Calculate percentage composition of the original mixture.
Answer» When 15 g of a mixture of NaCI and Na,CO, is heated with dilute HCI, 2.5 g of CO2 is evolvedat NTP. Calculate percentage composition of the original mixture.

Discussion

10.	In body centered cubic lattice given below, the three distance AB, AC and AA' are:
Answer» In body centered cubic lattice given below, the three distance AB, AC and AA' are:

10.

In body centered cubic lattice given below, the three distance AB, AC and AA' are:

Answer»

In body centered cubic lattice given below, the three distance AB, AC and AA' are:

Discussion

11.	If for two gases of molecular weights MA and MB at temperature TA and TB , TAMB=TBMA, then which property has the same magnitude for both the gases?
Answer» If for two gases of molecular weights $M_{A}$ and $M_{B}$ at temperature $T_{A}$ and $T_{B}$ , $T_{A} M_{B} = T_{B} M_{A}$ , then which property has the same magnitude for both the gases?

Discussion

12.	How to use remainder theoram in equations?
Answer» How to use remainder theoram in equations?

Discussion

13.	78 0.44g of a colourless oxide of nitrogen occupies 224 ml at STP. The compound is :- (1) N2O (2) NO (3) N2O2 (4) NO2
Answer» 78 0.44g of a colourless oxide of nitrogen occupies 224 ml at STP. The compound is :- (1) N2O (2) NO (3) N2O2 (4) NO2

Discussion

14.	11 The ionic conductance of Ba2+ and Cl- are respectively127 and 76 mho cm2 at infinite dilution.The equivalent conductance (in mho cm2) of BaCl2 at infinite dilution will be
Answer» 11 The ionic conductance of Ba2+ and Cl- are respectively127 and 76 mho cm2 at infinite dilution.The equivalent conductance (in mho cm2) of BaCl2 at infinite dilution will be

Discussion

15.	the major product obtained on treatment of CH_3CH_2CH(F)CH_3 with CH_3O^-/CH_3OH i
Answer» the major product obtained on treatment of CH_3CH_2CH(F)CH_3 with CH_3O^-/CH_3OH i

Discussion

16.	Which of the following sets of quantum numbers is correct for an electron in 4f− orbital?
Answer» Which of the following sets of quantum numbers is correct for an electron in $4 f -$ orbital?

Discussion

17.	Calculatethe mass percentage of benzene (C6H6)and carbon tetrachloride (CCl4)if 22 g of benzene is dissolved in 122 g of carbon tetrachloride.
Answer» Calculate the mass percentage of benzene (C₆H₆) and carbon tetrachloride (CCl₄) if 22 g of benzene is dissolved in 122 g of carbon tetrachloride.

Discussion

18.	Balloons of 4L capacity are to be filled with Hydrogen at a pressure of 1 atm and 270 C from an 8L cylinder containing Hydrogen at 10 atm at the same temperature. The number of balloons that can be filled is
Answer» Balloons of 4L capacity are to be filled with Hydrogen at a pressure of 1 atm and $27^{0} C$ from an 8L cylinder containing Hydrogen at 10 atm at the same temperature. The number of balloons that can be filled is

Discussion

19.	At high temperature and low pressure, van der Waals’ equation can be expressed as:
Answer» At high temperature and low pressure, van der Waals’ equation can be expressed as:

Discussion

20.	In the final product, Degree of unsaturation + No. of O atom=
Answer» In the final product, $Degree of unsaturation + No. of O atom=$

Discussion

21.	What is carbohydrate? How this formed?
Answer» What is carbohydrate? How this formed?

Discussion

22.	1 16.25 g metal chloride is obtained on complete conversion of 8g metal oxide into metal chloride then what will be the equivalent weight of metal:- (1) 18.66 (2) 37.32 (3) 9.33 (4) 2.91
Answer» 1 16.25 g metal chloride is obtained on complete conversion of 8g metal oxide into metal chloride then what will be the equivalent weight of metal:- (1) 18.66 (2) 37.32 (3) 9.33 (4) 2.91

Discussion

23.	Question 6 Consider the reactions (i) H2O2+2HI→I2+2H2O (ii) HOCl+H2O2→H3O+Cl−+O2 Which of the following statements is correct about H2O2 with reference to these reactions? Hydrogen peroxide is ........ (a) an oxidising agent in both (i) and (ii) (b) an oxidising agent in (i) and reducing agent in (ii) (c) a reducing agent in (i) and oxidising agent in (ii) (d) a reducing agent in both (i) and (ii)
Answer» Question 6 Consider the reactions (i) $H_{2} O_{2} + 2 H I \to I_{2} + 2 H_{2} O$ (ii) $H O C l + H_{2} O_{2} \to H_{3} O^{+} C l^{-} + O_{2}$ Which of the following statements is correct about $H_{2} O_{2}$ with reference to these reactions? Hydrogen peroxide is ........ (a) an oxidising agent in both (i) and (ii) (b) an oxidising agent in (i) and reducing agent in (ii) (c) a reducing agent in (i) and oxidising agent in (ii) (d) a reducing agent in both (i) and (ii)

23.

Question 6 Consider the reactions (i) H2O2+2HI→I2+2H2O (ii) HOCl+H2O2→H3O+Cl−+O2 Which of the following statements is correct about H2O2 with reference to these reactions? Hydrogen peroxide is ........ (a) an oxidising agent in both (i) and (ii) (b) an oxidising agent in (i) and reducing agent in (ii) (c) a reducing agent in (i) and oxidising agent in (ii) (d) a reducing agent in both (i) and (ii)

Answer»

Question 6

Consider the reactions

(i) $H_{2} O_{2} + 2 H I \to I_{2} + 2 H_{2} O$
(ii) $H O C l + H_{2} O_{2} \to H_{3} O^{+} C l^{-} + O_{2}$

Which of the following statements is correct about $H_{2} O_{2}$ with reference to these reactions? Hydrogen peroxide is ........

(a) an oxidising agent in both (i) and (ii)

(b) an oxidising agent in (i) and reducing agent in (ii)

(c) a reducing agent in (i) and oxidising agent in (ii)

(d) a reducing agent in both (i) and (ii)

Discussion

24.	The standard oxidation potential of Ni/Ni+2 electrode is 0.236 V. If this is combined with a hydrogen in acid solution, at what pH of the solution will the measured emf be zero at 25∘ C ?Given [Ni+2]=1 M, RTF=0.059 V
Answer» The standard oxidation potential of $N i / N i^{+ 2}$ electrode is $0.236 V$ . If this is combined with a hydrogen in acid solution, at what $p H$ of the solution will the measured emf be zero at $25^{\circ} C$ ? Given $[N i^{+ 2}] = 1 M, \frac{R T}{F} = 0.059 V$

Discussion

25.	Draw a closed circuit with one bulb surrounded by two switches and a battery consisting of three cells. Also, tell if the bulb will glow or not.
Answer» Draw a closed circuit with one bulb surrounded by two switches and a battery consisting of three cells. Also, tell if the bulb will glow or not.

Discussion

26.	Maximum covalent character is shown by1.NCl32. AsCl33. PCl34.SbCl3
Answer» Maximum covalent character is shown by 1.NCl3 2. AsCl3 3. PCl3 4.SbCl3

Discussion

27.	25. What factors adds to the stability of alkyl free radicals??
Answer» 25. What factors adds to the stability of alkyl free radicals??

Discussion

28.	Is gay-lussac's law applicable in an incomplete reaction?
Answer» Is gay-lussac's law applicable in an incomplete reaction?

Discussion

29.	a car is moving on a circular path and takes a turn if R1 and R2 be the reactions on inner and outer wheels respectively then what is the relation between R1 and R2?Explain in detailed manner
Answer» a car is moving on a circular path and takes a turn if R1 and R2 be the reactions on inner and outer wheels respectively then what is the relation between R1 and R2? Explain in detailed manner

Discussion

30.	Which of the following anions would be more stable than their corresponding protonated species? \|\|\| CH3−CH2−¯¯¯¯CH−CH2−CH=CH2 \|V CH3CH2−¯¯¯¯CH−CH=CH−CH3 select the correct answer from the following
Answer» Which of the following anions would be more stable than their corresponding protonated species? \|\|\| $C H_{3} - C H_{2} - ¯ ¯¯ ¯ C H - C H_{2} - C H = C H_{2}$ \|V $C H_{3} C H_{2} - ¯ ¯¯ ¯ C H - C H = C H - C H_{3}$ select the correct answer from the following

30.

Which of the following anions would be more stable than their corresponding protonated species? ||| CH3−CH2−¯¯¯¯CH−CH2−CH=CH2 |V CH3CH2−¯¯¯¯CH−CH=CH−CH3 select the correct answer from the following

Answer»

Which of the following anions would be more stable than their corresponding protonated species?

||| $C H_{3} - C H_{2} - ¯ ¯¯ ¯ C H - C H_{2} - C H = C H_{2}$

|V $C H_{3} C H_{2} - ¯ ¯¯ ¯ C H - C H = C H - C H_{3}$

select the correct answer from the following

Discussion

31.	Which one of the following acids is the weakest
Answer» Which one of the following acids is the weakest

Discussion

32.	Which of the following substances are repelled by magnetic field?
Answer» Which of the following substances are repelled by magnetic field?

Discussion

33.	What is seeding in crystalization?
Answer» What is seeding in crystalization?

Discussion

34.	Which are true statements among the following ?(A) PH5 and BiCl5 do not exist (B) Bond order of CO2−3 is 1.33(C) SeF4 and CH4 have same shape (D) I+3 has bent geometry(E) The number of Pπ−dπ bonds in SO2&SO3 are same
Answer» Which are true statements among the following ? (A) $P H_{5}$ and $B i C l_{5}$ do not exist (B) Bond order of $C O_{3}^{2 -}$ is 1.33 (C) $S e F_{4} a n d C H_{4}$ have same shape (D) $I_{3}^{+}$ has bent geometry (E) The number of $P_{π} - d_{π}$ bonds in $S O_{2} & S O_{3}$ are same

Discussion

35.	Writethe reactions of Williamson synthesis of 2-ethoxy-3-methylpentanestarting from ethanol and 3-methylpentan-2-ol.
Answer» Write the reactions of Williamson synthesis of 2-ethoxy-3-methylpentane starting from ethanol and 3-methylpentan-2-ol.

Discussion

36.	Identify the incorrect statement
Answer» Identify the incorrect statement

Discussion

37.	In calculation of coordinaton no. , In the case of face centred cubic, when corner atom point of view is taken there are 8*3=24 nearest face centres are present then how every face centre is counted twice❓
Answer» In calculation of coordinaton no. , In the case of face centred cubic, when corner atom point of view is taken there are 8*3=24 nearest face centres are present then how every face centre is counted twice❓

Discussion

38.	An aromatic amine (A) was treated with alcoholic potash and another compound (Y) when foul smelling gas was formed with formula C6H5NC. Y was formed by reacting a compound (Z) with Cl2 in the presence of slaked lime. The compound (Z) is [CBSE PMT 1990]
Answer» An aromatic amine (A) was treated with alcoholic potash and another compound (Y) when foul smelling gas was formed with formula C₆H₅NC. Y was formed by reacting a compound (Z) with Cl₂ in the presence of slaked lime. The compound (Z) is [CBSE PMT 1990]

38.

An aromatic amine (A) was treated with alcoholic potash and another compound (Y) when foul smelling gas was formed with formula C6H5NC. Y was formed by reacting a compound (Z) with Cl2 in the presence of slaked lime. The compound (Z) is [CBSE PMT 1990]

Answer»

An aromatic amine (A) was treated with alcoholic potash and another compound (Y) when foul smelling gas

was formed with formula C₆H₅NC. Y was formed by reacting a compound (Z) with Cl₂ in the presence of

slaked lime. The compound (Z) is [CBSE PMT 1990]

Discussion

39.	The pressure of a 1:4 mixture by moles of dihydrogen and dioxygen enclosed in a vessel is one bar. What will be the partial pressure of dioxygen?
Answer» The pressure of a $1 : 4$ mixture by moles of dihydrogen and dioxygen enclosed in a vessel is one bar. What will be the partial pressure of dioxygen?

Discussion

40.	In a certain process gas absorb Q amount of heat and perform nQ amount of work the molar heat capacity of the gas in the process is
Answer» In a certain process gas absorb Q amount of heat and perform nQ amount of work the molar heat capacity of the gas in the process is

Discussion

41.	'C' represent the height of the HCP unit cell and 'a' represent edge length of the hexagonal surface of the HCP unit cell. What is the value of Ca?
Answer» ' $C$ ' represent the height of the HCP unit cell and ' $a$ ' represent edge length of the hexagonal surface of the HCP unit cell. What is the value of $\frac{C}{a}$ ?

Discussion

42.	Beryllium is placed above magnesium in the second group. Beryllium dust, therefore when added to MgCl2 solution will [CPMT 1977]
Answer» Beryllium is placed above magnesium in the second group. Beryllium dust, therefore when added to MgCl₂solution will [CPMT 1977]

42.

Beryllium is placed above magnesium in the second group. Beryllium dust, therefore when added to MgCl2 solution will [CPMT 1977]

Answer»

Beryllium is placed above magnesium in the second group. Beryllium dust,

therefore when added to MgCl₂solution will

[CPMT 1977]

Discussion

43.	Cellulose has ___ beta glycosidic linkage.
Answer» Cellulose has ___ beta glycosidic linkage.

Discussion

44.	calculate number of electrons present in 9.5g of PO4
Answer» calculate number of electrons present in 9.5g of PO4

Discussion

45.	24.Why their is difference when naoh and na2co3 are titrated with phenolphthalein and methyl orange in HCL
Answer» 24.Why their is difference when naoh and na2co3 are titrated with phenolphthalein and methyl orange in HCL

Discussion

46.	are aldehydes isomeric with ethers
Answer» are aldehydes isomeric with ethers

Discussion

47.	The major products of the following reactionZnS(s)+O2(g)heat−−−−→Are
Answer» The major products of the following reaction $Z n S (s) + O_{2} (g) h e a t - --- \to$ Are

47.

The major products of the following reactionZnS(s)+O2(g)heat−−−−→Are

Answer»

The major products of the following reaction

$Z n S (s) + O_{2} (g) h e a t - --- \to$

Are

Discussion

48.	ntAB Dissociates as 2AB-2A+B2 WHEN THE INITIAL PRESSURE OF AB IS 500 mm the total pressure became 625 mm when the equilibrium is attained cal kp for the rxn assuming vol. remain constantn
Answer» ntAB Dissociates as 2AB-2A+B2 WHEN THE INITIAL PRESSURE OF AB IS 500 mm the total pressure became 625 mm when the equilibrium is attained cal kp for the rxn assuming vol. remain constantn

Discussion

49.	300 mL ofgold sol is mixed with 30 mL of 10% NaCl solution. The mass of Haemoglobin in mgrequired to protect the gold sol from coagulation is (gold number of Haemoglobin is 0.03)
Answer» 300 mL ofgold sol is mixed with 30 mL of 10% NaCl solution. The mass of Haemoglobin in mgrequired to protect the gold sol from coagulation is (gold number of Haemoglobin is 0.03)

Discussion

50.	The component of vector \overrightarrow A=2\overset∧ i+ 3\overset∧ j along the direction of (\overset{∧ }i- \overset∧ j) i
Answer» The component of vector \overrightarrow A=2\overset∧ i+ 3\overset∧ j along the direction of (\overset{∧ }i- \overset∧ j) i

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Prove the identity:sin2 Acos2 A+cos2 Asin2 A=1sin2 A cos2 A−2 [4 MARKS]

Three immiscible liquids of densities d1>d2>d3 and refractive indices μ1>μ2>μ3 are put in a beaker .The height of each liquid column is h/3.A dot is made at the bottom of the beaker.For near normal vision,find the apparent depth of the dot.

Is the following compound optically active:Di-sec-butyl ketone?

51. Explain Lewis representation of molecules

The order of polarity of NH3, NF3 and BF3 is

What are the properties of electrons

Which of the following compounds does not contain a multiple bond?

When 15 g of a mixture of NaCI and Na,CO, is heated with dilute HCI, 2.5 g of CO2 is evolvedat NTP. Calculate percentage composition of the original mixture.

In body centered cubic lattice given below, the three distance AB, AC and AA' are:

If for two gases of molecular weights MA and MB at temperature TA and TB , TAMB=TBMA, then which property has the same magnitude for both the gases?

How to use remainder theoram in equations?

78 0.44g of a colourless oxide of nitrogen occupies 224 ml at STP. The compound is :- (1) N2O (2) NO (3) N2O2 (4) NO2

11 The ionic conductance of Ba2+ and Cl- are respectively127 and 76 mho cm2 at infinite dilution.The equivalent conductance (in mho cm2) of BaCl2 at infinite dilution will be

the major product obtained on treatment of CH_3CH_2CH(F)CH_3 with CH_3O^-/CH_3OH i

Which of the following sets of quantum numbers is correct for an electron in 4f− orbital?

Calculatethe mass percentage of benzene (C6H6)and carbon tetrachloride (CCl4)if 22 g of benzene is dissolved in 122 g of carbon tetrachloride.

Balloons of 4L capacity are to be filled with Hydrogen at a pressure of 1 atm and 270 C from an 8L cylinder containing Hydrogen at 10 atm at the same temperature. The number of balloons that can be filled is

At high temperature and low pressure, van der Waals’ equation can be expressed as:

In the final product, Degree of unsaturation + No. of O atom=

What is carbohydrate? How this formed?

1 16.25 g metal chloride is obtained on complete conversion of 8g metal oxide into metal chloride then what will be the equivalent weight of metal:- (1) 18.66 (2) 37.32 (3) 9.33 (4) 2.91

The standard oxidation potential of Ni/Ni+2 electrode is 0.236 V. If this is combined with a hydrogen in acid solution, at what pH of the solution will the measured emf be zero at 25∘ C ?Given [Ni+2]=1 M, RTF=0.059 V

Draw a closed circuit with one bulb surrounded by two switches and a battery consisting of three cells. Also, tell if the bulb will glow or not.

Maximum covalent character is shown by1.NCl32. AsCl33. PCl34.SbCl3

25. What factors adds to the stability of alkyl free radicals??

Is gay-lussac's law applicable in an incomplete reaction?

a car is moving on a circular path and takes a turn if R1 and R2 be the reactions on inner and outer wheels respectively then what is the relation between R1 and R2?Explain in detailed manner

Which of the following anions would be more stable than their corresponding protonated species? ||| CH3−CH2−¯¯¯¯CH−CH2−CH=CH2 |V CH3CH2−¯¯¯¯CH−CH=CH−CH3 select the correct answer from the following

Which one of the following acids is the weakest

Which of the following substances are repelled by magnetic field?

What is seeding in crystalization?

Which are true statements among the following ?(A) PH5 and BiCl5 do not exist (B) Bond order of CO2−3 is 1.33(C) SeF4 and CH4 have same shape (D) I+3 has bent geometry(E) The number of Pπ−dπ bonds in SO2&amp;SO3 are same

Writethe reactions of Williamson synthesis of 2-ethoxy-3-methylpentanestarting from ethanol and 3-methylpentan-2-ol.

Identify the incorrect statement

In calculation of coordinaton no. , In the case of face centred cubic, when corner atom point of view is taken there are 8*3=24 nearest face centres are present then how every face centre is counted twice❓

An aromatic amine (A) was treated with alcoholic potash and another compound (Y) when foul smelling gas was formed with formula C6H5NC. Y was formed by reacting a compound (Z) with Cl2 in the presence of slaked lime. The compound (Z) is [CBSE PMT 1990]

The pressure of a 1:4 mixture by moles of dihydrogen and dioxygen enclosed in a vessel is one bar. What will be the partial pressure of dioxygen?

In a certain process gas absorb Q amount of heat and perform nQ amount of work the molar heat capacity of the gas in the process is

'C' represent the height of the HCP unit cell and 'a' represent edge length of the hexagonal surface of the HCP unit cell. What is the value of Ca?

Beryllium is placed above magnesium in the second group. Beryllium dust, therefore when added to MgCl2 solution will [CPMT 1977]

Cellulose has ___ beta glycosidic linkage.

calculate number of electrons present in 9.5g of PO4

24.Why their is difference when naoh and na2co3 are titrated with phenolphthalein and methyl orange in HCL

are aldehydes isomeric with ethers

The major products of the following reactionZnS(s)+O2(g)heat−−−−→Are

ntAB Dissociates as 2AB-2A+B2 WHEN THE INITIAL PRESSURE OF AB IS 500 mm the total pressure became 625 mm when the equilibrium is attained cal kp for the rxn assuming vol. remain constantn

300 mL ofgold sol is mixed with 30 mL of 10% NaCl solution. The mass of Haemoglobin in mgrequired to protect the gold sol from coagulation is (gold number of Haemoglobin is 0.03)

The component of vector \overrightarrow A=2\overset∧ i+ 3\overset∧ j along the direction of (\overset{∧ }i- \overset∧ j) i

Which are true statements among the following ?(A) PH5 and BiCl5 do not exist (B) Bond order of CO2−3 is 1.33(C) SeF4 and CH4 have same shape (D) I+3 has bent geometry(E) The number of Pπ−dπ bonds in SO2&SO3 are same