46295 + Interview Questions in Chemistry

1.	The calculated magnetic moment of Fen+ ion is 4.90 BM. The sum of the number of unpaired electrons present in 3d subshell of Fen+ ion and the value of n is
Answer» The calculated magnetic moment of $F e^{n +}$ ion is 4.90 BM. The sum of the number of unpaired electrons present in $3 d$ subshell of $F e^{n +}$ ion and the value of n is

Discussion

2.	Mark out the correct increasing order of radius.
Answer» Mark out the correct increasing order of radius.

Discussion

3.	A gas bulb of 1 mL capacity contains 2.0x1021 molecules of nitrogen exerting a pressure of 7.57x103 Nm-2. The root mean square speed of the gas molecules is
Answer» A gas bulb of 1 mL capacity contains 2.0x10²¹ molecules of nitrogen exerting a pressure of 7.57x10³ Nm^-2. The root mean square speed of the gas molecules is

Discussion

4.	Urea (H2NCONH2) is manufactured by passing CO2(g) through ammonia solution followed by crystallization. CO2 for the above reaction is prepared by combustion of hydrocarbon. If combustion of 236 kg of a saturated hydrocarbon (CnH2n+2) produces as much CO2 as required for production of 999.6 kg urea then molecular formula of hydrocarbon is:
Answer» Urea $(H_{2} N C O N H_{2})$ is manufactured by passing $C O_{2} (g)$ through ammonia solution followed by crystallization. $C O_{2}$ for the above reaction is prepared by combustion of hydrocarbon. If combustion of $236 k g$ of a saturated hydrocarbon $(C_{n} H_{2 n + 2})$ produces as much $C O_{2}$ as required for production of $999.6 k g$ urea then molecular formula of hydrocarbon is:

Discussion

5.	The S.I unit of permittivity is
Answer» The S.I unit of permittivity is

Discussion

6.	The isoelectronic pair is
Answer» The isoelectronic pair is

Discussion

7.	The C−O−C angle would be maximum in
Answer» The $C - O - C$ angle would be maximum in

Discussion

8.	Which one of the following is most acidic?
Answer» Which one of the following is most acidic?

Discussion

9.	A substance X is a compound of s− block element, substance X gives a violet color in flame test, X is :
Answer» A substance $X$ is a compound of $s -$ block element, substance $X$ gives a violet color in flame test, $X$ is :

Discussion

10.	Question 19 Consider the figure and mark the correct option. (a) Water will move from side (A) to side (B) if a pressure lower osmotic pressure is applied on pistion (B) (b) Water wil move from side (B) to side (A) if a pressure greater than osmotic pressure is applied on piston (B) (c) Water will move from side (B) to side (A) if a pressure equal to osmotic pressure is applied on piston (B) (d) Water will move from side (A) to side (B) if pressure equal to osmotic pressure is applied on piston (A)
Answer» Question 19 Consider the figure and mark the correct option. (a) Water will move from side (A) to side (B) if a pressure lower osmotic pressure is applied on pistion (B) (b) Water wil move from side (B) to side (A) if a pressure greater than osmotic pressure is applied on piston (B) (c) Water will move from side (B) to side (A) if a pressure equal to osmotic pressure is applied on piston (B) (d) Water will move from side (A) to side (B) if pressure equal to osmotic pressure is applied on piston (A)

Discussion

11.	Which of the following cyclic dienes does not show geometrical isomerism?
Answer» Which of the following cyclic dienes does not show geometrical isomerism?

Discussion

12.	For 2SO2(g)+O2(g)→2SO3(g), ΔH is equal to:
Answer» For $2 S O_{2} (g) + O_{2} (g) \to 2 S O_{3} (g)$ , $Δ H$ is equal to:

Discussion

13.	The maximum n-factor (nf) for H3PO3 and H3PO4 respectively is:
Answer» The maximum n-factor $(n_{f})$ for $H_{3} P O_{3}$ and $H_{3} P O_{4}$ respectively is:

Discussion

14.	On the ozonolysis of alkynes, the third bond i.e. the bond between the carbons in the intermediate ozonide. (the bond which is not cleaved by ozone) is a Sigma bond or a π bond?
Answer» On the ozonolysis of alkynes, the third bond i.e. the bond between the carbons in the intermediate ozonide. (the bond which is not cleaved by ozone) is a Sigma bond or a π bond?

Discussion

15.	The correct orientations of dipoles in pyrrole and pyridine is:
Answer» The correct orientations of dipoles in pyrrole and pyridine is:

Discussion

16.	0.01~M solution of an acid HA freezes at −0.0205∘C. If Kf for water is 1.86 Kkgmol−1.The ionization constant for the conjugate base of the acid will be (consider molarity ≃ molality):
Answer» $0.01 ~ M$ solution of an acid HA freezes at $- {0.0205}^{\circ} C$ . If $K_{f}$ for water is $1.86 {Kkgmol}^{- 1}$ .The ionization constant for the conjugate base of the acid will be (consider molarity $≃$ molality):

Discussion

17.	When ammonium perchlorate is heated below 300 oC, which of the following gases are produced?
Answer» When ammonium perchlorate is heated below $300^{o} C$ , which of the following gases are produced?

Discussion

18.	Which oxide of nitrogen is most stable at 273 K?
Answer» Which oxide of nitrogen is most stable at 273 K?

Discussion

19.	The efficiency of a carnot engine is 16. On decreasing the temperature of the sink by 65 K, the efficiency increases to 13. The temperature of the sink (in K) is
Answer» The efficiency of a carnot engine is $\frac{1}{6}$ . On decreasing the temperature of the sink by $65 K$ , the efficiency increases to $\frac{1}{3}$ . The temperature of the sink (in K) is

Discussion

20.	Can u plz... Provide me the webpage from where I can do the quick summary of this chapter p block element for board exam
Answer» Can u plz... Provide me the webpage from where I can do the quick summary of this chapter p block element for board exam

Discussion

21.	How would you write condensed formula for neo-pentane
Answer» How would you write condensed formula for neo-pentane

Discussion

22.	Which of the following will show a negative deviation from raoults law? A. Acetone-benzene B. Acetone-ethanol C. Benzene- methanol D. Acetone-chloroform
Answer» Which of the following will show a negative deviation from raoults law? A. Acetone-benzene B. Acetone-ethanol C. Benzene- methanol D. Acetone-chloroform

Discussion

23.	What is inductive effect order
Answer» What is inductive effect order

Discussion

24.	A black body at 200 K is found to emit maximum energy at a wavelength of 14 μm. When its temperature is raised to 1000 K, the wavelength at which maximum energy is emitted is
Answer» A black body at 200 K is found to emit maximum energy at a wavelength of 14 $μ m$ . When its temperature is raised to 1000 K, the wavelength at which maximum energy is emitted is

Discussion

25.	Will a person be able to produce enough RBCs if his legs (Femur) are surgically removed ? What all be the consequences?
Answer» Will a person be able to produce enough RBCs if his legs (Femur) are surgically removed ? What all be the consequences?

Discussion

26.	Cobalt has the same size and sodium but Cobalt chloride is not soluble in water while sodium chloride is
Answer» Cobalt has the same size and sodium but Cobalt chloride is not soluble in water while sodium chloride is

Discussion

27.	Diamagnetic species can be
Answer» Diamagnetic species can be

Discussion

28.	What is the hybridisation of Xe in XeO3?
Answer» What is the hybridisation of Xe in XeO₃?

Discussion

29.	Using the standard electrode potentials given in the table, predict if the reaction between the following is feasible: Fe3+(aq) and I−(aq) Ag+(aq) and Cu(s) Fe3+(aq) and Cu(s) Ag(s) and Fe3+(aq) Br2(aq) and Fe2+(aq)
Answer» Using the standard electrode potentials given in the table, predict if the reaction between the following is feasible: $F e_{(a q)}^{3 +}$ and $I_{(a q)}^{-}$ $A g^{+} (a q)$ and $C u (s)$ $F e^{3 +} (a q)$ and $C u (s)$ $A g (s)$ and $F e^{3 +} (a q)$ $B r_{2} (a q)$ and $F e^{2 +} (a q)$

29.

Using the standard electrode potentials given in the table, predict if the reaction between the following is feasible: Fe3+(aq) and I−(aq) Ag+(aq) and Cu(s) Fe3+(aq) and Cu(s) Ag(s) and Fe3+(aq) Br2(aq) and Fe2+(aq)

Answer»

Using the standard electrode potentials given in the table, predict if the reaction between the following is feasible:
$F e_{(a q)}^{3 +}$ and $I_{(a q)}^{-}$

$A g^{+} (a q)$ and $C u (s)$

$F e^{3 +} (a q)$ and $C u (s)$

$A g (s)$ and $F e^{3 +} (a q)$

$B r_{2} (a q)$ and $F e^{2 +} (a q)$

Discussion

30.	Calculate the total number of electrons present in one mole of methane. Find (a) the total number and (b) the total mass of neutrons in 7 mg of 14C. (Assume that mass of a neutron = 1.675 × 10–27 kg). Find (a) the total number and (b) the total mass of protons in 34 mg of NH3 at STP. Will the answer change if the temperature and pressure are changed?
Answer» Calculate the total number of electrons present in one mole of methane. Find (a) the total number and (b) the total mass of neutrons in 7 mg of 14C. (Assume that mass of a neutron = 1.675 × $10^{- 27}$ kg). Find (a) the total number and (b) the total mass of protons in 34 mg of $N H_{3}$ at STP. Will the answer change if the temperature and pressure are changed?

30.

Calculate the total number of electrons present in one mole of methane. Find (a) the total number and (b) the total mass of neutrons in 7 mg of 14C. (Assume that mass of a neutron = 1.675 × 10–27 kg). Find (a) the total number and (b) the total mass of protons in 34 mg of NH3 at STP. Will the answer change if the temperature and pressure are changed?

Answer»

Calculate the total number of electrons present in one mole of methane.

Find (a) the total number and (b) the total mass of neutrons in 7 mg of 14C. (Assume that mass of a neutron = 1.675 × $10^{- 27}$ kg).

Find (a) the total number and (b) the total mass of protons in 34 mg of $N H_{3}$ at STP. Will the answer change if the temperature and pressure are changed?

Discussion

31.	The ΔH∘f for CO2(g),CO(g) and H2O(g) are −393.5,−110.5 and −241.8kJ mole−1 respectively. The standard enthalpy change in kJ for the reaction CO2(g) + H2(g) → CO(g) + H2O(g) is
Answer» The $Δ H_{f}^{\circ}$ for $C O_{2} (g), C O (g)$ and $H_{2} O (g)$ are $- 393.5, - 110.5$ and $- 241.8 k J m o l e^{- 1}$ respectively. The standard enthalpy change in kJ for the reaction $C O_{2} (g) + H_{2} (g) \to C O (g) + H_{2} O (g)$ is

Discussion

32.	Equivalent mass of K2Cr2O7 when it acts as an oxidizing agent in acidic medium?
Answer» Equivalent mass of K₂Cr₂O₇ when it acts as an oxidizing agent in acidic medium?

Discussion

33.	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

34.	Marsh gas
Answer» Marsh gas

Discussion

35.	Which of the following is not an ionic compound
Answer» Which of the following is not an ionic compound

Discussion

36.	The correct order of radii is
Answer» The correct order of radii is

Discussion

37.	The reaction between alkali and CO2(g) is slow. Because -
Answer» The reaction between alkali and $C O_{2}$ (g) is slow. Because -

Discussion

38.	What is colour of hydrangea if soil is not acidic nor basic ?Or what is colour of hydrangea if soil is neutral?
Answer» What is colour of hydrangea if soil is not acidic nor basic ?Or what is colour of hydrangea if soil is neutral?

Discussion

39.	The oxidative cleavage of compounds Glucose (A) and Fructose (B) with HIO4 leads to the formation of acids and aldehydes. The ratios of formic acid to formaldehyde for (A) and (B) respectively are
Answer» The oxidative cleavage of compounds Glucose (A) and Fructose (B) with $H I O_{4}$ leads to the formation of acids and aldehydes. The ratios of formic acid to formaldehyde for (A) and (B) respectively are

Discussion

40.	Polymer used in bullet proof glass is
Answer» Polymer used in bullet proof glass is

Discussion

41.	Deviation in ideal behavior is not observed at
Answer» Deviation in ideal behavior is not observed at

Discussion

42.	The electrostatic force of attraction between a proton and an electron in a hydrogen atom corresponds to which component of energy possessed by the electron?
Answer» The electrostatic force of attraction between a proton and an electron in a hydrogen atom corresponds to which component of energy possessed by the electron?

Discussion

43.	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 critical temperature liquid passes into gaseous state imperceptibly and continuously. Reason (R) The density of liquid and gaseous phase is equal to crictical temperature. (a) Both A and R are true and R is the correct explanation of A (b) Both A and R are true but 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 critical temperature liquid passes into gaseous state imperceptibly and continuously. Reason (R) The density of liquid and gaseous phase is equal to crictical temperature. (a) Both A and R are true and R is the correct explanation of A (b) Both A and R are true but R is not the correct explanation of A (c) A is true but R is false (d) A is false but R is true

43.

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 critical temperature liquid passes into gaseous state imperceptibly and continuously. Reason (R) The density of liquid and gaseous phase is equal to crictical temperature. (a) Both A and R are true and R is the correct explanation of A (b) Both A and R are true but 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 critical temperature liquid passes into gaseous state imperceptibly and continuously.

Reason (R) The density of liquid and gaseous phase is equal to crictical temperature.

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

(b) Both A and R are true but 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

44.	Ostwald's process is used to manufacture:
Answer» Ostwald's process is used to manufacture:

Discussion

45.	Lanthanoid contraction is observed in:
Answer» Lanthanoid contraction is observed in:

Discussion

46.	0.622 g of a metal carbonate on heating gives 0.466 g of its oxide and some CO2. Calculate the equivalent weight of the metal.
Answer» $0.622 g$ of a metal carbonate on heating gives $0.466 g$ of its oxide and some $C O_{2}$ . Calculate the equivalent weight of the metal.

Discussion

47.	Why but-2-ene is more stable than but-1-ene?
Answer» Why but-2-ene is more stable than but-1-ene?

Discussion

48.	Identify the compound (s) having all their chiral centres in R configuration only.
Answer» Identify the compound (s) having all their chiral centres in R configuration only.

Discussion

49.	The number of hydrogen atoms attached to phosphorous atom in hypo phosphorus acid is
Answer» The number of hydrogen atoms attached to phosphorous atom in hypo phosphorus acid is

Discussion

50.	Easily liquefiable gases have
Answer» Easily liquefiable gases have

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The calculated magnetic moment of Fen+ ion is 4.90 BM. The sum of the number of unpaired electrons present in 3d subshell of Fen+ ion and the value of n is

Mark out the correct increasing order of radius.

A gas bulb of 1 mL capacity contains 2.0x1021 molecules of nitrogen exerting a pressure of 7.57x103 Nm-2. The root mean square speed of the gas molecules is

The S.I unit of permittivity is

The isoelectronic pair is

The C−O−C angle would be maximum in

Which one of the following is most acidic?

A substance X is a compound of s− block element, substance X gives a violet color in flame test, X is :

Which of the following cyclic dienes does not show geometrical isomerism?

For 2SO2(g)+O2(g)→2SO3(g), ΔH is equal to:

The maximum n-factor (nf) for H3PO3 and H3PO4 respectively is:

On the ozonolysis of alkynes, the third bond i.e. the bond between the carbons in the intermediate ozonide. (the bond which is not cleaved by ozone) is a Sigma bond or a π bond?

The correct orientations of dipoles in pyrrole and pyridine is:

0.01~M solution of an acid HA freezes at −0.0205∘C. If Kf for water is 1.86 Kkgmol−1.The ionization constant for the conjugate base of the acid will be (consider molarity ≃ molality):

When ammonium perchlorate is heated below 300 oC, which of the following gases are produced?

Which oxide of nitrogen is most stable at 273 K?

The efficiency of a carnot engine is 16. On decreasing the temperature of the sink by 65 K, the efficiency increases to 13. The temperature of the sink (in K) is

Can u plz... Provide me the webpage from where I can do the quick summary of this chapter p block element for board exam

How would you write condensed formula for neo-pentane

Which of the following will show a negative deviation from raoults law? A. Acetone-benzene B. Acetone-ethanol C. Benzene- methanol D. Acetone-chloroform

What is inductive effect order

A black body at 200 K is found to emit maximum energy at a wavelength of 14 μm. When its temperature is raised to 1000 K, the wavelength at which maximum energy is emitted is

Will a person be able to produce enough RBCs if his legs (Femur) are surgically removed ? What all be the consequences?

Cobalt has the same size and sodium but Cobalt chloride is not soluble in water while sodium chloride is

Diamagnetic species can be

What is the hybridisation of Xe in XeO3?

Using the standard electrode potentials given in the table, predict if the reaction between the following is feasible: Fe3+(aq) and I−(aq) Ag+(aq) and Cu(s) Fe3+(aq) and Cu(s) Ag(s) and Fe3+(aq) Br2(aq) and Fe2+(aq)

The ΔH∘f for CO2(g),CO(g) and H2O(g) are −393.5,−110.5 and −241.8kJ mole−1 respectively. The standard enthalpy change in kJ for the reaction CO2(g) + H2(g) → CO(g) + H2O(g) is

Equivalent mass of K2Cr2O7 when it acts as an oxidizing agent in acidic medium?

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

Marsh gas

Which of the following is not an ionic compound

The correct order of radii is

The reaction between alkali and CO2(g) is slow. Because -

What is colour of hydrangea if soil is not acidic nor basic ?Or what is colour of hydrangea if soil is neutral?

The oxidative cleavage of compounds Glucose (A) and Fructose (B) with HIO4 leads to the formation of acids and aldehydes. The ratios of formic acid to formaldehyde for (A) and (B) respectively are

Polymer used in bullet proof glass is

Deviation in ideal behavior is not observed at

The electrostatic force of attraction between a proton and an electron in a hydrogen atom corresponds to which component of energy possessed by the electron?

Ostwald's process is used to manufacture:

Lanthanoid contraction is observed in:

0.622 g of a metal carbonate on heating gives 0.466 g of its oxide and some CO2. Calculate the equivalent weight of the metal.

Why but-2-ene is more stable than but-1-ene?

Identify the compound (s) having all their chiral centres in R configuration only.

The number of hydrogen atoms attached to phosphorous atom in hypo phosphorus acid is

Easily liquefiable gases have