46295 + Interview Questions in Chemistry

1.	X g of KMnO4 on being treated with KI in acid solution liberates just sufficient I2 to react with 50 ml of 0.1 M hypo solution. Na2S2O3+I2→Na2S4O6+2NaI Find the value of X. (The molecular weight of KMnO4=158 gmol−1) .
Answer» X g of $K M n O_{4}$ on being treated with $K I$ in acid solution liberates just sufficient $I_{2}$ to react with 50 ml of 0.1 M hypo solution. $N a_{2} S_{2} O_{3} + I_{2} \to N a_{2} S_{4} O_{6} + 2 N a I$ Find the value of X. (The molecular weight of $K M n O_{4} = 158 g m o l^{- 1}$ ) .

Discussion

2.	Dipole-dipole forces act between the molecules possesing permanent dipole. Ends of dipoles posses 'partial charges'. The partial charge is (a) more than unit electronic charge (b) equal to unit electronic charge (c) less than unit electronic charge (d) double the unit electronic charge
Answer» Dipole-dipole forces act between the molecules possesing permanent dipole. Ends of dipoles posses 'partial charges'. The partial charge is (a) more than unit electronic charge (b) equal to unit electronic charge (c) less than unit electronic charge (d) double the unit electronic charge

2.

Dipole-dipole forces act between the molecules possesing permanent dipole. Ends of dipoles posses 'partial charges'. The partial charge is (a) more than unit electronic charge (b) equal to unit electronic charge (c) less than unit electronic charge (d) double the unit electronic charge

Answer»

Dipole-dipole forces act between the molecules possesing permanent dipole. Ends of dipoles posses 'partial charges'. The partial charge is

(a) more than unit electronic charge (b) equal to unit electronic charge

(c) less than unit electronic charge (d) double the unit electronic charge

Discussion

3.	The pairs of species having identical shapes for molecules is
Answer» The pairs of species having identical shapes for molecules is

Discussion

4.	Question 12 Orbital angular momentum depends on........... (a) l (b) n and l (c) n and m (d) m and s
Answer» Question 12 Orbital angular momentum depends on........... (a) l (b) n and l (c) n and m (d) m and s

4.

Question 12 Orbital angular momentum depends on........... (a) l (b) n and l (c) n and m (d) m and s

Answer»

Question 12

Orbital angular momentum depends on...........

(a) l (b) n and l (c) n and m (d) m and s

Discussion

5.	The fraction of total volume occupied by the atoms present in a simple cube is
Answer» The fraction of total volume occupied by the atoms present in a simple cube is

Discussion

6.	Which of the following fact is true ?
Answer» Which of the following fact is true ?

Discussion

7.	A first order reaction is 50% completed in 1.26×1014s. How much time would it take for 100% completion ? (a)1.26×1015s(b)2.52×1014s(c)2.52×1028s(d)Infinite
Answer» A first order reaction is 50% completed in $1.26 \times 10^{14} s .$ How much time would it take for 100% completion ? $(a) 1.26 \times 10^{15} s (b) 2.52 \times 10^{14} s (c) 2.52 \times 10^{28} s (d) I n f i n i t e$

7.

A first order reaction is 50% completed in 1.26×1014s. How much time would it take for 100% completion ? (a)1.26×1015s(b)2.52×1014s(c)2.52×1028s(d)Infinite

Answer»

A first order reaction is 50% completed in $1.26 \times 10^{14} s .$ How much time would it take for 100% completion ?

$(a) 1.26 \times 10^{15} s (b) 2.52 \times 10^{14} s (c) 2.52 \times 10^{28} s (d) I n f i n i t e$

Discussion

8.	Sodium reacts with water more vigorously than lithium because:
Answer» Sodium reacts with water more vigorously than lithium because:

Discussion

9.	16 g of oxygen has same number of molecules as in (a) 16 g of CO (b) 28 g of N2 (c) 14 g of N2 (d) 1.0 g of H2
Answer» 16 g of oxygen has same number of molecules as in (a) 16 g of CO (b) 28 g of $N_{2}$ (c) 14 g of $N_{2}$ (d) 1.0 g of $H_{2}$

9.

16 g of oxygen has same number of molecules as in (a) 16 g of CO (b) 28 g of N2 (c) 14 g of N2 (d) 1.0 g of H2

Answer»

16 g of oxygen has same number of molecules as in

(a) 16 g of CO (b) 28 g of $N_{2}$ (c) 14 g of $N_{2}$ (d) 1.0 g of $H_{2}$

Discussion

10.	Write a balanced chemical equation of reaction of citric acid with basic copper oxide forming copper citrate
Answer» Write a balanced chemical equation of reaction of citric acid with basic copper oxide forming copper citrate

Discussion

11.	The correct order of the mobility of alkali metal ions in aqueous solution is
Answer» The correct order of the mobility of alkali metal ions in aqueous solution is

Discussion

12.	2 moles of an Ideal Gas are compressed isothermally (100∘C) and reversibly from a pressure of 10 atm to 25 atm. The value of Wrev is
Answer» 2 moles of an Ideal Gas are compressed isothermally ( $100^{\circ} C$ ) and reversibly from a pressure of 10 atm to 25 atm. The value of Wrev is

Discussion

13.	Among the following the compounds which can undergo an SN1 reaction in an aqueous solution, are:
Answer» Among the following the compounds which can undergo an $S_{N} 1$ reaction in an aqueous solution, are:

Discussion

14.	Thallium shows different oxidation states because:
Answer» Thallium shows different oxidation states because:

Discussion

15.	1∘ amine reacts with HNO2 to give effervescence due to :
Answer» $1^{\circ}$ amine reacts with $H N O_{2}$ to give effervescence due to :

Discussion

16.	25.4g of I2 and 14.2g of Cl2 are made to react completely to yield a mixture of ICl and ICl3 .Calculate moles of ICl and ICl3 formed.
Answer» 25.4g of $I_{2}$ and 14.2g of $C l_{2}$ are made to react completely to yield a mixture of $I C l$ and $I C l_{3}$ .Calculate moles of $I C l$ and $I C l_{3}$ formed.

Discussion

17.	In equimolar solution of glucose, NaCl and BaCl2, the order of osmotic pressure is as follows:
Answer» In equimolar solution of glucose, NaCl and BaCl₂, the order of osmotic pressure is as follows:

Discussion

18.	If the energy difference between two electronic states is 47.5 kcalmol−1 and the frequency of the light emitted when the electrons drop from a higher state to lower states is x×1014, what is the value of x? (N.h=9.5×10−14 kcal s−1mol−1,where, N is the Avogadro's number and h is the Planck's constant)
Answer» If the energy difference between two electronic states is $47.5 k c a l m o l^{- 1}$ and the frequency of the light emitted when the electrons drop from a higher state to lower states is $x \times 10^{14}$ , what is the value of $x$ ? $(N . h = 9.5 \times 10^{- 14} k c a l s^{- 1} m o l^{- 1}, where, N is the Avogadro's number and h is the Planck's constant)$

Discussion

19.	Rotation around carbon - carbon single bond of ethane is not completely free. Discuss.
Answer» Rotation around carbon - carbon single bond of ethane is not completely free. Discuss.

Discussion

20.	A measured temperature on Fahrenheit scale is 200∘F. What will this reading be on celsius scale ? (a) 40∘C (b) 94∘C (c) 93.3∘C (d) 30∘
Answer» A measured temperature on Fahrenheit scale is $200^{\circ} F .$ What will this reading be on celsius scale ? (a) $40^{\circ} C$ (b) $94^{\circ} C$ (c) ${93.3}^{\circ} C$ (d) $30^{\circ}$

20.

A measured temperature on Fahrenheit scale is 200∘F. What will this reading be on celsius scale ? (a) 40∘C (b) 94∘C (c) 93.3∘C (d) 30∘

Answer»

A measured temperature on Fahrenheit scale is $200^{\circ} F .$ What will this reading be on celsius scale ?

(a) $40^{\circ} C$ (b) $94^{\circ} C$

(c) ${93.3}^{\circ} C$ (d) $30^{\circ}$

Discussion

21.	The mixture of compounds A and B is passed through a column of Al2O3 by using alcohol as eluant. Compound A is eluted in preference to compound B. Which of the compounds A or B, is more readily adsorbed on the column?
Answer» The mixture of compounds A and B is passed through a column of $A l_{2} O_{3}$ by using alcohol as eluant. Compound A is eluted in preference to compound B. Which of the compounds A or B, is more readily adsorbed on the column?

Discussion

22.	What is the role of cryllite in the metallurgy of aluminimum?
Answer» What is the role of cryllite in the metallurgy of aluminimum?

Discussion

23.	Triple bond is not present in
Answer» Triple bond is not present in

Discussion

24.	HClO4.2H20+H2SO4→ gives:
Answer» $H C l O_{4} .2 H_{2} 0 + H_{2} S O_{4} \to$ gives:

Discussion

25.	I. HClO II. XeF2 III. SO2−4 IV. XeOF4 For the given molecule, the increasing order of lone pairs in the central atoms follow the order:
Answer» $I . H C l O I I . X e F_{2}$ $I I I . S O_{4}^{2 -} I V . X e O F_{4}$ For the given molecule, the increasing order of lone pairs in the central atoms follow the order:

Discussion

26.	Dipole moment of H2O is 1.85 D. If bond angle is 105∘ and O - H bond length is 0.94 ∘A
Answer» Dipole moment of $H_{2} O$ is 1.85 D. If bond angle is $105^{\circ}$ and O - H bond length is $0.94 \circ A$

Discussion

27.	H2O2 can act as:
Answer» H₂O₂can act as:

Discussion

28.	The correct stability order for N2 and its given ions is:
Answer» The correct stability order for $N_{2}$ and its given ions is:

Discussion

29.	How many oxygen atoms are present in 2 gram-atoms of O?
Answer» How many oxygen atoms are present in 2 gram-atoms of $O$ ?

Discussion

30.	A metal has a fcc lattice. The edge length of the cell is 404 pm. The density of the metal is 2.72 g cm−3 . The molar mass of the metal is (NA Avogadro's constant = 6.02×1023mol−1)
Answer» A metal has a fcc lattice. The edge length of the cell is 404 pm. The density of the metal is $2.72 g c m^{- 3}$ . The molar mass of the metal is ( $N_{A}$ Avogadro's constant = $6.02 \times 10^{23} m o l^{- 1}$ )

Discussion

31.	An organic compound having the formula C3H6O does not give a precipitate with 2,4 dinitro phenyl hydrazine and does not react with sodium metal. The compound is expected to be A. CH3CH2CHO B. CH3COCH3 C. CH2=CHCH2OH D.CH2=CH-OCH3
Answer» An organic compound having the formula C₃H₆O does not give a precipitate with 2,4 dinitro phenyl hydrazine and does not react with sodium metal. The compound is expected to be A. CH₃CH₂CHO B. CH₃COCH₃ C. CH₂=CHCH₂OH D.CH₂=CH-OCH₃

31.

An organic compound having the formula C3H6O does not give a precipitate with 2,4 dinitro phenyl hydrazine and does not react with sodium metal. The compound is expected to be A. CH3CH2CHO B. CH3COCH3 C. CH2=CHCH2OH D.CH2=CH-OCH3

Answer»

An organic compound having the formula C₃H₆O does not give a precipitate with 2,4 dinitro phenyl hydrazine and does not react with sodium metal. The compound is expected to be

A. CH₃CH₂CHO B. CH₃COCH₃ C. CH₂=CHCH₂OH D.CH₂=CH-OCH₃

Discussion

32.	Explain the following (i) Electronegativity of elements increase on moving from left to right in the periodic table. (ii) Ionisation enthalpy decreases in a group from top to bottom.
Answer» Explain the following (i) Electronegativity of elements increase on moving from left to right in the periodic table. (ii) Ionisation enthalpy decreases in a group from top to bottom.

32.

Explain the following (i) Electronegativity of elements increase on moving from left to right in the periodic table. (ii) Ionisation enthalpy decreases in a group from top to bottom.

Answer»

Explain the following
(i) Electronegativity of elements increase on moving from left to right in the periodic table.

(ii) Ionisation enthalpy decreases in a group from top to bottom.

Discussion

33.	p×10−q is the molarity of SO2−4 ion in an aqueous solution that contains 34.2 ppm of Al2(SO4)3. Calculate (p+q)? (Assume complete dissociation and density of solution 1 g L−1)
Answer» $p \times 10^{- q}$ is the molarity of $S O_{4}^{2 -}$ ion in an aqueous solution that contains $34.2 p p m$ of $A l_{2} (S O_{4})_{3}$ . Calculate $(p + q)$ ? (Assume complete dissociation and density of solution $1 g L^{- 1})$

Discussion

34.	What is the oxidation state of cu and fe in cufes2
Answer» What is the oxidation state of cu and fe in cufes2

Discussion

35.	Why the structure of H2O ( water) is bent?,why not triangular
Answer» Why the structure of H2O ( water) is bent?,why not triangular

Discussion

36.	The correct order of bond angles (smallest first) in H2S, NH3, BF3 and SiH4 is-
Answer» The correct order of bond angles (smallest first) in $H_{2} S, N H_{3}, B F_{3}$ and $S i H_{4}$ is-

Discussion

37.	Cr2O2−7H+⟶Cr3+ Find the equivalent weight of Cr2O2−7 in the above redox half reaction. (Given the molar mass of Cr2O2−7 is M g/mol)
Answer» $C r_{2} O_{7}^{2 -}^{+} C r^{3 +}$ Find the equivalent weight of $C r_{2} O_{7}^{2 -}$ in the above redox half reaction. (Given the molar mass of $C r_{2} O_{7}^{2 -}$ is $M g / m o l$ )

Discussion

38.	Calculate the mass of Na2CO3 which will have the same number of molecules as contained in 12.3 gram of MgSO4MgSO4.7H2O
Answer» Calculate the mass of Na₂CO₃ which will have the same number of molecules as contained in 12.3 gram of MgSO₄MgSO4.7H₂O

Discussion

39.	Second ionization potential of oxygen is
Answer» Second ionization potential of oxygen is

Discussion

40.	What is carbonation and carbonion
Answer» What is carbonation and carbonion

Discussion

41.	If you are provided with 2.5 M NaOH solution having density 1.5 g/mL, then find the molality of solution.
Answer» If you are provided with $2.5 M$ NaOH solution having density $1.5 g / m L$ , then find the molality of solution.

Discussion

42.	In the following question, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below in each question. Assertion (A) At constant temperature, PV vs V plot for real gases is not a straight line. Reason (R) At high pressure all gases have Z > 1 but at an intermediate pressure, most gases have Z < 1. (a) Both A and R are true and R is the correct explanation of A (b) Both A and R are true R is not the correct explanation of A (c) A is true but R is false (d) A is false but R is true
Answer» In the following question, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below in each question. Assertion (A) At constant temperature, PV vs V plot for real gases is not a straight line. Reason (R) At high pressure all gases have Z > 1 but at an intermediate pressure, most gases have Z < 1. (a) Both A and R are true and R is the correct explanation of A (b) Both A and R are true R is not the correct explanation of A (c) A is true but R is false (d) A is false but R is true

42.

In the following question, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below in each question. Assertion (A) At constant temperature, PV vs V plot for real gases is not a straight line. Reason (R) At high pressure all gases have Z > 1 but at an intermediate pressure, most gases have Z < 1. (a) Both A and R are true and R is the correct explanation of A (b) Both A and R are true R is not the correct explanation of A (c) A is true but R is false (d) A is false but R is true

Answer»

In the following question, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below in each question.

Assertion (A) At constant temperature, PV vs V plot for real gases is not a straight line.

Reason (R) At high pressure all gases have Z > 1 but at an intermediate pressure, most gases have Z < 1.

(a) Both A and R are true and R is the correct explanation of A

(b) Both A and R are true R is not the correct explanation of A

(c) A is true but R is false

(d) A is false but R is true

Discussion

43.	The carbon – based reduction method is not used for the extraction of
Answer» The carbon – based reduction method is not used for the extraction of

Discussion

44.	When an aldehyde is heated with Fehling's solution, the latter is reduced to give a red ppt of:
Answer» When an aldehyde is heated with Fehling's solution, the latter is reduced to give a red ppt of:

Discussion

45.	At 25∘C, the ionization constants of CH3COOH and NH3 are almost equal. The pH of a solution of 0.01 M CH3COOH is 4.0 at 25∘C. The pOH of 0.01 M NH4OH at the same temperature will be :
Answer» At $25^{\circ} C$ , the ionization constants of $C H_{3} C O O H$ and $N H_{3}$ are almost equal. The pH of a solution of $0.01 M C H_{3} C O O H$ is 4.0 at $25^{\circ} C$ . The pOH of 0.01 $M N H_{4} O H$ at the same temperature will be :

Discussion

46.	Which ion has maximum magnetic moment?
Answer» Which ion has maximum magnetic moment?

Discussion

47.	The substances that are formed after a completion of a reaction are called:
Answer» The substances that are formed after a completion of a reaction are called:

Discussion

48.	In which of the following compounds electron withdrawing group is not present?
Answer» In which of the following compounds electron withdrawing group is not present?

Discussion

49.	A first order reaction is 75% completed in 100 minutes. How long time will it take for its 87.5% completion?
Answer» A first order reaction is $75 %$ completed in $100 m i n u t e s$ . How long time will it take for its $87.5 %$ completion?

Discussion

50.	A balloon blown with 1 mol of a gas, has a volume of 480 ml at 5∘C. If the balloon is filled to 78 th of its maximum capacity, then which of the following is/ are correct?
Answer» A balloon blown with 1 mol of a gas, has a volume of 480 ml at $5^{\circ} C$ . If the balloon is filled to $\frac{7}{8}$ th of its maximum capacity, then which of the following is/ are correct?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

X g of KMnO4 on being treated with KI in acid solution liberates just sufficient I2 to react with 50 ml of 0.1 M hypo solution. Na2S2O3+I2→Na2S4O6+2NaI Find the value of X. (The molecular weight of KMnO4=158 gmol−1) .

Dipole-dipole forces act between the molecules possesing permanent dipole. Ends of dipoles posses 'partial charges'. The partial charge is (a) more than unit electronic charge (b) equal to unit electronic charge (c) less than unit electronic charge (d) double the unit electronic charge

The pairs of species having identical shapes for molecules is

Question 12 Orbital angular momentum depends on........... (a) l (b) n and l (c) n and m (d) m and s

The fraction of total volume occupied by the atoms present in a simple cube is

Which of the following fact is true ?

A first order reaction is 50% completed in 1.26×1014s. How much time would it take for 100% completion ? (a)1.26×1015s(b)2.52×1014s(c)2.52×1028s(d)Infinite

Sodium reacts with water more vigorously than lithium because:

16 g of oxygen has same number of molecules as in (a) 16 g of CO (b) 28 g of N2 (c) 14 g of N2 (d) 1.0 g of H2

Write a balanced chemical equation of reaction of citric acid with basic copper oxide forming copper citrate

The correct order of the mobility of alkali metal ions in aqueous solution is

2 moles of an Ideal Gas are compressed isothermally (100∘C) and reversibly from a pressure of 10 atm to 25 atm. The value of Wrev is

Among the following the compounds which can undergo an SN1 reaction in an aqueous solution, are:

Thallium shows different oxidation states because:

1∘ amine reacts with HNO2 to give effervescence due to :

25.4g of I2 and 14.2g of Cl2 are made to react completely to yield a mixture of ICl and ICl3 .Calculate moles of ICl and ICl3 formed.

In equimolar solution of glucose, NaCl and BaCl2, the order of osmotic pressure is as follows:

Rotation around carbon - carbon single bond of ethane is not completely free. Discuss.

A measured temperature on Fahrenheit scale is 200∘F. What will this reading be on celsius scale ? (a) 40∘C (b) 94∘C (c) 93.3∘C (d) 30∘

The mixture of compounds A and B is passed through a column of Al2O3 by using alcohol as eluant. Compound A is eluted in preference to compound B. Which of the compounds A or B, is more readily adsorbed on the column?

What is the role of cryllite in the metallurgy of aluminimum?

Triple bond is not present in

HClO4.2H20+H2SO4→ gives:

I. HClO II. XeF2 III. SO2−4 IV. XeOF4 For the given molecule, the increasing order of lone pairs in the central atoms follow the order:

Dipole moment of H2O is 1.85 D. If bond angle is 105∘ and O - H bond length is 0.94 ∘A

H2O2 can act as:

The correct stability order for N2 and its given ions is:

How many oxygen atoms are present in 2 gram-atoms of O?

A metal has a fcc lattice. The edge length of the cell is 404 pm. The density of the metal is 2.72 g cm−3 . The molar mass of the metal is (NA Avogadro's constant = 6.02×1023mol−1)

An organic compound having the formula C3H6O does not give a precipitate with 2,4 dinitro phenyl hydrazine and does not react with sodium metal. The compound is expected to be A. CH3CH2CHO B. CH3COCH3 C. CH2=CHCH2OH D.CH2=CH-OCH3

Explain the following (i) Electronegativity of elements increase on moving from left to right in the periodic table. (ii) Ionisation enthalpy decreases in a group from top to bottom.

p×10−q is the molarity of SO2−4 ion in an aqueous solution that contains 34.2 ppm of Al2(SO4)3. Calculate (p+q)? (Assume complete dissociation and density of solution 1 g L−1)

What is the oxidation state of cu and fe in cufes2

Why the structure of H2O ( water) is bent?,why not triangular

The correct order of bond angles (smallest first) in H2S, NH3, BF3 and SiH4 is-

Cr2O2−7H+⟶Cr3+ Find the equivalent weight of Cr2O2−7 in the above redox half reaction. (Given the molar mass of Cr2O2−7 is M g/mol)

Calculate the mass of Na​​​​​2​CO​​3 which will have the same number of molecules as contained in 12.3 gram of MgSO​​​4​​MgSO4.7H2O

Second ionization potential of oxygen is

What is carbonation and carbonion

If you are provided with 2.5 M NaOH solution having density 1.5 g/mL, then find the molality of solution.

The carbon – based reduction method is not used for the extraction of

When an aldehyde is heated with Fehling's solution, the latter is reduced to give a red ppt of:

At 25∘C, the ionization constants of CH3COOH and NH3 are almost equal. The pH of a solution of 0.01 M CH3COOH is 4.0 at 25∘C. The pOH of 0.01 M NH4OH at the same temperature will be :

Which ion has maximum magnetic moment?

The substances that are formed after a completion of a reaction are called:

In which of the following compounds electron withdrawing group is not present?

A first order reaction is 75% completed in 100 minutes. How long time will it take for its 87.5% completion?

A balloon blown with 1 mol of a gas, has a volume of 480 ml at 5∘C. If the balloon is filled to 78 th of its maximum capacity, then which of the following is/ are correct?

Calculate the mass of Na2CO3 which will have the same number of molecules as contained in 12.3 gram of MgSO4MgSO4.7H2O