46295 + Interview Questions in Chemistry

1.	In carbylamine reaction, primary amine reacts with alkaline CHCl3 and the final product is a carbylamine. What is the change in oxidation state of N in carbylamine reaction?
Answer» In carbylamine reaction, primary amine reacts with alkaline $C H C l_{3}$ and the final product is a carbylamine. What is the change in oxidation state of $N$ in carbylamine reaction?

Discussion

2.	The quantity of heat required to raise one gram molecule by one degree for a monoatomic gas at constant pressure is?
Answer» The quantity of heat required to raise one gram molecule by one degree for a monoatomic gas at constant pressure is?

Discussion

3.	Arrange them in the order of increasing ionic radii. N3+, O2-, F-, Na+, Mg2+, and Al3+
Answer» Arrange them in the order of increasing ionic radii. N3+, O2-, F-, Na+, Mg2+, and Al3+

Discussion

4.	The structure of the product formed in the reaction given below is:
Answer» The structure of the product formed in the reaction given below is:

Discussion

5.	An alkene occupies 0.8 L g−1 at STP. Thus, the total number of atoms of carbon and hydrogen in one formula unit are:
Answer» An alkene occupies $0.8 {L g}^{- 1}$ at STP. Thus, the total number of atoms of carbon and hydrogen in one formula unit are:

Discussion

6.	There are two types of fertilisers F1 and F2. F1 consists of 10% nitrogen and 6% phosphoric acid, F2 consists of 5% nitrogen and 10% phosphoric acid. After testing the soil conditions, a farmer finds that she needs atleast 14 kg of nitrogen and 14 kg of phosphoric acid for her crop. If F1 costs Rs 6/kg and F2 costs Rs 5/kg, determine how much amount of each type of fertiliser should be used so that nutrient requirements are met at a minimum cost. What is the minimum cost?
Answer» There are two types of fertilisers $F_{1}$ and $F_{2}$ . $F_{1}$ consists of $10 %$ nitrogen and $6 %$ phosphoric acid, $F_{2}$ consists of $5 %$ nitrogen and $10 %$ phosphoric acid. After testing the soil conditions, a farmer finds that she needs atleast $14 kg$ of nitrogen and $14 kg$ of phosphoric acid for her crop. If $F_{1}$ costs Rs $6 / kg$ and $F_{2}$ costs Rs $5 / kg$ , determine how much amount of each type of fertiliser should be used so that nutrient requirements are met at a minimum cost. What is the minimum cost?

Discussion

7.	If there is force of attraction between the molecules of the gases then the molecules should collide and due to friction their energy should be lost and ultimately there should be no kinetic energy of a particles and all motion of particles should be seized and there should be no concept of gases then why this is not?
Answer» If there is force of attraction between the molecules of the gases then the molecules should collide and due to friction their energy should be lost and ultimately there should be no kinetic energy of a particles and all motion of particles should be seized and there should be no concept of gases then why this is not?

Discussion

8.	Calcium carbide reacts with nitrogen and forms an important fertilizer. How many grams of this fertilizer can be formed when 6.4 g of calcium carbide is completely used for this process?
Answer» Calcium carbide reacts with nitrogen and forms an important fertilizer. How many grams of this fertilizer can be formed when 6.4 g of calcium carbide is completely used for this process?

Discussion

9.	in solid KHCO3,HCO3–(anion) ions exist as Monomer Dimer Polymer H+ & CO3(2-)
Answer» in solid KHCO3,HCO3–(anion) ions exist as Monomer Dimer Polymer H+ & CO3(2-)

9.

in solid KHCO3,HCO3–(anion) ions exist as Monomer Dimer Polymer H+ & CO3(2-)

Answer»

in solid KHCO3,HCO3–(anion) ions exist as

Monomer

Dimer

Polymer

H+ & CO3(2-)

Discussion

10.	The solubility of As2S3 is observed to be 148×10−9M in a solution of 10–2M Na2S solution at 25°C, assuming no hydrolysis of cationic or anionic part. The Ksp value ofAs2S3 at 25°C is:
Answer» The solubility of $A s_{2} S_{3}$ is observed to be $\frac{1}{48} \times 10^{- 9} M$ in a solution of $10^{- 2} M$ $N a_{2} S$ solution at $25 ° C$ , assuming no hydrolysis of cationic or anionic part. The $K_{s p}$ value of $A s_{2} S_{3}$ at $25 ° C$ is:

Discussion

11.	With the established results of Boyle, Charles and other contemporary savants, the study of gases had gained momentum. Gay-Lusaac, et al, observed that gases tend to combine in whole number ratios (one gram of oxygen would only combine with two grams of hydrogen to make water, etc.), which had no good explanation until Amedeo Avogadro, in a little noticed publication in1811, hypothesized -under the same pressure and temperature, equal volumes of gases would have equal number of particles. This was later verified, and eventually proved by the kinetic theory, and the hypothesis was promoted to "Avogadro's Law". Consider the following situation: A container made of conducting walls, having a volume V and weighing 100 gms, is filled with hydrogen gas up to a pressure P. There is a light piston, initially located at the far right end, which can be moved to divide the volume in parts. The piston is moved, very slowly, from right to left in such a way that the hydrogen is pushed out through a one-way valve on the left, and oxygen is pulled in through the right end via a similar valve. Doing this slowly makes sure that at any given point, the forces on the piston from either sides are balanced and add to zero. If the mass of the hydrogen-filled container was initially 104 grams, what is its mass when the piston has been moved all the way to the left wall? You can assume the system is always in thermal equilibrium with the surroundings, which is at a constant temperature T. Try and apply Avogadro's Law to the situation.
Answer» With the established results of Boyle, Charles and other contemporary savants, the study of gases had gained momentum. Gay-Lusaac, et al, observed that gases tend to combine in whole number ratios (one gram of oxygen would only combine with two grams of hydrogen to make water, etc.), which had no good explanation until Amedeo Avogadro, in a little noticed publication in1811, hypothesized -under the same pressure and temperature, equal volumes of gases would have equal number of particles. This was later verified, and eventually proved by the kinetic theory, and the hypothesis was promoted to "Avogadro's Law". Consider the following situation: A container made of conducting walls, having a volume V and weighing 100 gms, is filled with hydrogen gas up to a pressure P. There is a light piston, initially located at the far right end, which can be moved to divide the volume in parts. The piston is moved, very slowly, from right to left in such a way that the hydrogen is pushed out through a one-way valve on the left, and oxygen is pulled in through the right end via a similar valve. Doing this slowly makes sure that at any given point, the forces on the piston from either sides are balanced and add to zero. If the mass of the hydrogen-filled container was initially 104 grams, what is its mass when the piston has been moved all the way to the left wall? You can assume the system is always in thermal equilibrium with the surroundings, which is at a constant temperature T. Try and apply Avogadro's Law to the situation.

11.

With the established results of Boyle, Charles and other contemporary savants, the study of gases had gained momentum. Gay-Lusaac, et al, observed that gases tend to combine in whole number ratios (one gram of oxygen would only combine with two grams of hydrogen to make water, etc.), which had no good explanation until Amedeo Avogadro, in a little noticed publication in1811, hypothesized -under the same pressure and temperature, equal volumes of gases would have equal number of particles. This was later verified, and eventually proved by the kinetic theory, and the hypothesis was promoted to "Avogadro's Law". Consider the following situation: A container made of conducting walls, having a volume V and weighing 100 gms, is filled with hydrogen gas up to a pressure P. There is a light piston, initially located at the far right end, which can be moved to divide the volume in parts. The piston is moved, very slowly, from right to left in such a way that the hydrogen is pushed out through a one-way valve on the left, and oxygen is pulled in through the right end via a similar valve. Doing this slowly makes sure that at any given point, the forces on the piston from either sides are balanced and add to zero. If the mass of the hydrogen-filled container was initially 104 grams, what is its mass when the piston has been moved all the way to the left wall? You can assume the system is always in thermal equilibrium with the surroundings, which is at a constant temperature T. Try and apply Avogadro's Law to the situation.

Answer»

With the established results of Boyle, Charles and other contemporary savants, the study of gases had gained momentum. Gay-Lusaac, et al, observed that gases tend to combine in whole number ratios (one gram of oxygen would only combine with two grams of hydrogen to make water, etc.), which had no good explanation until Amedeo Avogadro, in a little noticed publication in1811, hypothesized -under the same pressure and temperature, equal volumes of gases would have equal number of particles. This was later verified, and eventually proved by the kinetic theory, and the hypothesis was promoted to "Avogadro's Law". Consider the following situation: A container made of conducting walls, having a volume V and weighing 100 gms, is filled with hydrogen gas up to a pressure P. There is a light piston, initially located at the far right end, which can be moved to divide the volume in parts. The piston is moved, very slowly, from right to left in such a way that the hydrogen is pushed out through a one-way valve on the left, and oxygen is pulled in through the right end via a similar valve. Doing this slowly makes sure that at any given point, the forces on the piston from either sides are balanced and add to zero. If the mass of the hydrogen-filled container was initially 104 grams, what is its mass when the piston has been moved all the way to the left wall? You can assume the system is always in thermal equilibrium with the surroundings, which is at a constant temperature T. Try and apply Avogadro's Law to the situation.

Discussion

12.	How many gram moles of HCl will be required to prepare one litre of a buffer solution (containing NaCN and HCN) of pH 8.5 using 0.01 gram formula weight of NaCN ? Ka (HCN) = 4.1 × 10−10
Answer» How many gram moles of $H C l$ will be required to prepare one litre of a buffer solution (containing $N a C N$ and $H C N$ ) of $p H 8.5$ using $0.01 g r a m$ formula weight of $N a C N$ ? $K_{a} (H C N)$ = $4.1 \times 10^{- 10}$

12.

How many gram moles of HCl will be required to prepare one litre of a buffer solution (containing NaCN and HCN) of pH 8.5 using 0.01 gram formula weight of NaCN ? Ka (HCN) = 4.1 × 10−10

Answer»

How many gram moles of $H C l$ will be required to prepare one litre of a buffer solution (containing $N a C N$ and $H C N$ ) of $p H 8.5$ using $0.01 g r a m$ formula weight of $N a C N$ ?

$K_{a} (H C N)$ = $4.1 \times 10^{- 10}$

Discussion

13.	For the following three reactions a, b, and c, equilibrium constants are given: (A) CO(g)+H2O(g)⇋CO2(g)+H2(g);K1 (B) CH4(g)+H2O(g)⇋CO(g)+3H2(g);K2 (C) CH4(g)+2H2O(g)⇋CO2(g)+4H2(g);K3 Which of the following relations is correct
Answer» For the following three reactions a, b, and c, equilibrium constants are given: (A) $C O (g) + H_{2} O (g) ⇋ C O_{2} (g) + H_{2} (g); K_{1}$ (B) $C H_{4} (g) + H_{2} O (g) ⇋ C O (g) + 3 H_{2} (g); K_{2}$ (C) $C H_{4} (g) + 2 H_{2} O (g) ⇋ C O_{2} (g) + 4 H_{2} (g); K_{3}$ Which of the following relations is correct

Discussion

14.	Which of the following is true for an adiabatic process?
Answer» Which of the following is true for an adiabatic process?

Discussion

15.	What is a complex salt
Answer» What is a complex salt

Discussion

16.	Which of the following represent s-orbital?
Answer» Which of the following represent s-orbital?

Discussion

17.	550 kJ cycle-1 work is done by 1 mol of an ideal gas in a cyclic process. The amount of heat absorbed by the system is one cycle is
Answer» 550 kJ cycle-1 work is done by 1 mol of an ideal gas in a cyclic process. The amount of heat absorbed by the system is one cycle is

Discussion

18.	Find the number of atoms in 4.35g of NH3? And also find its mass ratio with hydrogen gas I.e H2?
Answer» Find the number of atoms in 4.35g of NH₃? And also find its mass ratio with hydrogen gas I.e H₂?

Discussion

19.	A proton and an alpha particle having the same kinetic energy are in turn allowed to pass through a uniform magnetic field perpendicular to the direction of motion. The ratio of the radii of their path is
Answer» A proton and an alpha particle having the same kinetic energy are in turn allowed to pass through a uniform magnetic field perpendicular to the direction of motion. The ratio of the radii of their path is

Discussion

20.	How greater nuclear attraction results in smaller atomic radii
Answer» How greater nuclear attraction results in smaller atomic radii

Discussion

21.	Calculate the total number of electrons present in 1.4 gm of nitrogen gas
Answer» Calculate the total number of electrons present in 1.4 gm of nitrogen gas

Discussion

22.	On heating a crystal of KCl in potassium vapour the crystal starts exhibiting a violet colour. Why
Answer» On heating a crystal of KCl in potassium vapour the crystal starts exhibiting a violet colour. Why

Discussion

23.	If the refractive indices of crown glass for red, yellow and violet colours are 1.5140. 1.5170 and 1.5318 respectively and for flint glass these are 1.6434, 1.6499 and 1.6852 respectively, then the dispersive power for crown and flint glass are respectively:
Answer» If the refractive indices of crown glass for red, yellow and violet colours are 1.5140. 1.5170 and 1.5318 respectively and for flint glass these are 1.6434, 1.6499 and 1.6852 respectively, then the dispersive power for crown and flint glass are respectively:

Discussion

24.	Sythetic detergents have advantage over usual soaps as far as cleansing power is concerned. But use of synthetic detergents over a long time creates environmental pollution. How can the pollution caused by synthetic detergents be minimised? Classify the detergents according to their chemical nature.
Answer» Sythetic detergents have advantage over usual soaps as far as cleansing power is concerned. But use of synthetic detergents over a long time creates environmental pollution. How can the pollution caused by synthetic detergents be minimised? Classify the detergents according to their chemical nature.

Discussion

25.	How does the metallic and non- metallic character vary on moving from left to right in a period?
Answer» How does the metallic and non- metallic character vary on moving from left to right in a period?

Discussion

26.	Which of the following has least bond dissociation energy ?
Answer» Which of the following has least bond dissociation energy ?

Discussion

27.	Basic nd simple difference between conductivity and molar conductivity
Answer» Basic nd simple difference between conductivity and molar conductivity

Discussion

28.	2. The stability of Cu2+ (aq) is more than that of Cu+ (aq). Why? I mark question
Answer» 2. The stability of Cu2+ (aq) is more than that of Cu+ (aq). Why? I mark question

Discussion

29.	The total number of lone pair of electrons on Xe atom in XeOF4 is
Answer» The total number of lone pair of electrons on $X e$ atom in $X e O F _{4}$ is

29.

The total number of lone pair of electrons on Xe atom in XeOF4 is

Answer»

The total number of lone pair of electrons on $X e$ atom in $X e O F _{4}$ is

Discussion

30.	3 g of activated charcoal was added to 50 ml of acetic acid solution (0.06 M) in a flask. After an hour it was filtered, and the strength of filtrate was found to be 0.042 M. The mass of acetic acid adsorbed per gram of charcoal is:
Answer» 3 g of activated charcoal was added to 50 ml of acetic acid solution (0.06 M) in a flask. After an hour it was filtered, and the strength of filtrate was found to be 0.042 M. The mass of acetic acid adsorbed per gram of charcoal is:

Discussion

31.	Justify that the following reactions are redox reactions: CuO(s)+H2(g)→Cu(s)+H2O(g) Fe2O3(s)+3CO(g)→2Fe(s)+3CO2(g) 4BCl3(g)+3LiAlH4(s)→2B2H6(g)+3LiCl(s)+3AlCl3(s) 2K(s)+F2(g)→2K+F–(s) 4NH3(g)+5O2(g)→4NO(g)+6H2O(g)
Answer» Justify that the following reactions are redox reactions: $C u O (s) + H_{2} (g) \to C u (s) + H_{2} O (g)$ $F e_{2} O_{3} (s) + 3 C O (g) \to 2 F e (s) + 3 C O_{2} (g)$ $4 B C l_{3} (g) + 3 L i A l H_{4} (s) \to 2 B_{2} H_{6} (g) + 3 L i C l (s) + 3 A l C l_{3} (s)$ $2 K (s) + F_{2} (g) \to 2 K + F - (s)$ $4 N H_{3} (g) + 5 O_{2} (g) \to 4 N O (g) + 6 H_{2} O (g)$

31.

Justify that the following reactions are redox reactions: CuO(s)+H2(g)→Cu(s)+H2O(g) Fe2O3(s)+3CO(g)→2Fe(s)+3CO2(g) 4BCl3(g)+3LiAlH4(s)→2B2H6(g)+3LiCl(s)+3AlCl3(s) 2K(s)+F2(g)→2K+F–(s) 4NH3(g)+5O2(g)→4NO(g)+6H2O(g)

Answer»

Justify that the following reactions are redox reactions:
$C u O (s) + H_{2} (g) \to C u (s) + H_{2} O (g)$

$F e_{2} O_{3} (s) + 3 C O (g) \to 2 F e (s) + 3 C O_{2} (g)$

$4 B C l_{3} (g) + 3 L i A l H_{4} (s) \to 2 B_{2} H_{6} (g) + 3 L i C l (s) + 3 A l C l_{3} (s)$

$2 K (s) + F_{2} (g) \to 2 K + F - (s)$

$4 N H_{3} (g) + 5 O_{2} (g) \to 4 N O (g) + 6 H_{2} O (g)$

Discussion

32.	For a dilute solution containing 2.5 g of a non-volatile non-electrolyte solute in 100 g of water, the elevation in boiling point at 1 atm pressure is 2∘C. Assuming concentration of solute is much lower than the concentration of solvent, the vapour pressure (mm of Hg) of the solution is (take Kb=0.76K kg mol−1).
Answer» For a dilute solution containing 2.5 g of a non-volatile non-electrolyte solute in 100 g of water, the elevation in boiling point at 1 atm pressure is $2^{\circ} C$ . Assuming concentration of solute is much lower than the concentration of solvent, the vapour pressure (mm of Hg) of the solution is (take $K_{b}$ =0.76K kg $m o l^{- 1}$ ).

Discussion

33.	Which orbital is nearest to the nucleus ?
Answer» Which orbital is nearest to the nucleus ?

Discussion

34.	In a set of reactions, acetic acid yielded a product D. CH3COOHSOCl2→Abenzene→anhyd AlCl2BHCN→CH2O+→D The structure of D would be:
Answer» In a set of reactions, acetic acid yielded a product D. $C H_{3} C O O H S O C l_{2} \to A b e n z e n e \to a n h y d A l C l_{2} B H C N \to C H_{2} O^{+} \to D$ The structure of D would be:

Discussion

35.	What is the relation between eqilibrium constant and the stability of reactants? Justify.
Answer» What is the relation between eqilibrium constant and the stability of reactants? Justify.

Discussion

36.	Which of the following will give a pair of enantiomorphs? (en=NH2CH2CH2NH2)
Answer» Which of the following will give a pair of enantiomorphs? $(e n = N H_{2} C H_{2} C H_{2} N H_{2})$

36.

Which of the following will give a pair of enantiomorphs? (en=NH2CH2CH2NH2)

Answer»

Which of the following will give a pair of enantiomorphs?

$(e n = N H_{2} C H_{2} C H_{2} N H_{2})$

Discussion

37.	Which metal does not form amalgam
Answer» Which metal does not form amalgam

Discussion

38.	Which of the following is tertiary alcohol [DPMT 2000]?
Answer» Which of the following is tertiary alcohol [DPMT 2000]?

Discussion

39.	If Kp for the reaction, A(g)+2B(g)⇌3C(g)+D(g) is 0.05 atm at 1000K. Its Kc in terms of unit R will be:
Answer» If K_p for the reaction, A(g)+2B(g)⇌3C(g)+D(g) is 0.05 atm at 1000K. Its K_cin terms of unit R will be:

Discussion

40.	Compound (C) was prepared in a three step sequence from ethyl trifluoroacetate. The first step in a sequence involved treating ethyl trifluoroacetate with NH3 to give a compound (A), which on heating with (X) gives (B). (B) on treatment with an orangometallic (Y), followed by hydrolysis produces (C) . Based on above passage attempt the following questions: Structure of (A), would be
Answer» Compound (C) was prepared in a three step sequence from ethyl trifluoroacetate. The first step in a sequence involved treating ethyl trifluoroacetate with NH₃ to give a compound (A), which on heating with (X) gives (B). (B) on treatment with an orangometallic (Y), followed by hydrolysis produces (C) . Based on above passage attempt the following questions: Structure of (A), would be

Discussion

41.	The structure of (A) is:
Answer» The structure of (A) is:

Discussion

42.	Which element is found in free state
Answer» Which element is found in free state

Discussion

43.	There are two samples of HCl having molarity 1M and 0.25N. Find the volume of these sample taken in order to prepare 0.75N HCl solution (Assume no water is used):
Answer» There are two samples of HCl having molarity 1M and 0.25N. Find the volume of these sample taken in order to prepare 0.75N HCl solution (Assume no water is used):

Discussion

44.	A vessel of 120 mL capacity contains a certain amount of gas at 35∘C and 1.2 bar pressure. The gas is transferred to another vessel of volume 180 mL at 35∘C. What would be its pressure?
Answer» A vessel of 120 mL capacity contains a certain amount of gas at $35^{\circ} C$ and 1.2 bar pressure. The gas is transferred to another vessel of volume 180 mL at $35^{\circ} C$ . What would be its pressure?

Discussion

45.	Who has won gold in men’s senior 50m pistol event at the 61st National Shooting Championships Competition (NSCC-2017)?
Answer» Who has won gold in men’s senior 50m pistol event at the 61st National Shooting Championships Competition (NSCC-2017)?

Discussion

46.	Calculate the total number of electrons in 18 ml of water
Answer» Calculate the total number of electrons in 18 ml of water

Discussion

47.	The product of I⊖ with MnO⊖4 in acidic medium:-
Answer» The product of $I^{⊖}$ with $M n O_{4}^{⊖}$ in acidic medium:-

Discussion

48.	The initial concentration of cane sugar is presence of an acid was reduced from 0.20 to 0.1M in 5hours and to 0.05M in 10hours value of K ? Ans .0.1368/hour pls put it on paper
Answer» The initial concentration of cane sugar is presence of an acid was reduced from 0.20 to 0.1M in 5hours and to 0.05M in 10hours value of K ? Ans .0.1368/hour pls put it on paper

48.

The initial concentration of cane sugar is presence of an acid was reduced from 0.20 to 0.1M in 5hours and to 0.05M in 10hours value of K ? Ans .0.1368/hour pls put it on paper

Answer»

The initial concentration of cane sugar is presence of an acid was reduced from 0.20 to 0.1M in 5hours and to 0.05M in 10hours value of K ?

Ans .0.1368/hour pls put it on paper

Discussion

49.	NH3 group in a co-ordination compound is named as
Answer» $N H_{3}$ group in a co-ordination compound is named as

Discussion

50.	Differentiate between : a) Physical and chemical Equilibrium b) Physical and chemical process
Answer» Differentiate between : a) Physical and chemical Equilibrium b) Physical and chemical process

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

In carbylamine reaction, primary amine reacts with alkaline CHCl3 and the final product is a carbylamine. What is the change in oxidation state of N in carbylamine reaction?

The quantity of heat required to raise one gram molecule by one degree for a monoatomic gas at constant pressure is?

Arrange them in the order of increasing ionic radii. N3+, O2-, F-, Na+, Mg2+, and Al3+

The structure of the product formed in the reaction given below is:

An alkene occupies 0.8 L g−1 at STP. Thus, the total number of atoms of carbon and hydrogen in one formula unit are:

Calcium carbide reacts with nitrogen and forms an important fertilizer. How many grams of this fertilizer can be formed when 6.4 g of calcium carbide is completely used for this process?

in solid KHCO3,HCO3–(anion) ions exist as Monomer Dimer Polymer H+ &amp; CO3(2-)

The solubility of As2S3 is observed to be 148×10−9M in a solution of 10–2M Na2S solution at 25°C, assuming no hydrolysis of cationic or anionic part. The Ksp value ofAs2S3 at 25°C is:

How many gram moles of HCl will be required to prepare one litre of a buffer solution (containing NaCN and HCN) of pH 8.5 using 0.01 gram formula weight of NaCN ? Ka (HCN) = 4.1 × 10−10

For the following three reactions a, b, and c, equilibrium constants are given: (A) CO(g)+H2O(g)⇋CO2(g)+H2(g);K1 (B) CH4(g)+H2O(g)⇋CO(g)+3H2(g);K2 (C) CH4(g)+2H2O(g)⇋CO2(g)+4H2(g);K3 Which of the following relations is correct

Which of the following is true for an adiabatic process?

What is a complex salt

Which of the following represent s-orbital?

550 kJ cycle-1 work is done by 1 mol of an ideal gas in a cyclic process. The amount of heat absorbed by the system is one cycle is

Find the number of atoms in 4.35g of NH​​​​​3? And also find its mass ratio with hydrogen gas I.e H​​​​​2?

A proton and an alpha particle having the same kinetic energy are in turn allowed to pass through a uniform magnetic field perpendicular to the direction of motion. The ratio of the radii of their path is

How greater nuclear attraction results in smaller atomic radii

Calculate the total number of electrons present in 1.4 gm of nitrogen gas

On heating a crystal of KCl in potassium vapour the crystal starts exhibiting a violet colour. Why

If the refractive indices of crown glass for red, yellow and violet colours are 1.5140. 1.5170 and 1.5318 respectively and for flint glass these are 1.6434, 1.6499 and 1.6852 respectively, then the dispersive power for crown and flint glass are respectively:

How does the metallic and non- metallic character vary on moving from left to right in a period?

Which of the following has least bond dissociation energy ?

Basic nd simple difference between conductivity and molar conductivity

2. The stability of Cu2+ (aq) is more than that of Cu+ (aq). Why? I mark question

The total number of lone pair of electrons on Xe atom in XeOF­4 is

3 g of activated charcoal was added to 50 ml of acetic acid solution (0.06 M) in a flask. After an hour it was filtered, and the strength of filtrate was found to be 0.042 M. The mass of acetic acid adsorbed per gram of charcoal is:

Justify that the following reactions are redox reactions: CuO(s)+H2(g)→Cu(s)+H2O(g) Fe2O3(s)+3CO(g)→2Fe(s)+3CO2(g) 4BCl3(g)+3LiAlH4(s)→2B2H6(g)+3LiCl(s)+3AlCl3(s) 2K(s)+F2(g)→2K+F–(s) 4NH3(g)+5O2(g)→4NO(g)+6H2O(g)

Which orbital is nearest to the nucleus ?

In a set of reactions, acetic acid yielded a product D. CH3COOHSOCl2→Abenzene→anhyd AlCl2BHCN→CH2O+→D The structure of D would be:

What is the relation between eqilibrium constant and the stability of reactants? Justify.

Which of the following will give a pair of enantiomorphs? (en=NH2CH2CH2NH2)

Which metal does not form amalgam

Which of the following is tertiary alcohol [DPMT 2000]?

If Kp for the reaction, A(g)+2B(g)⇌3C(g)+D(g) is 0.05 atm at 1000K. Its Kc in terms of unit R will be:

The structure of (A) is:

Which element is found in free state

There are two samples of HCl having molarity 1M and 0.25N. Find the volume of these sample taken in order to prepare 0.75N HCl solution (Assume no water is used):

A vessel of 120 mL capacity contains a certain amount of gas at 35∘C and 1.2 bar pressure. The gas is transferred to another vessel of volume 180 mL at 35∘C. What would be its pressure?

Who has won gold in men’s senior 50m pistol event at the 61st National Shooting Championships Competition (NSCC-2017)?

Calculate the total number of electrons in 18 ml of water

The product of I⊖ with MnO⊖4 in acidic medium:-

The initial concentration of cane sugar is presence of an acid was reduced from 0.20 to 0.1M in 5hours and to 0.05M in 10hours value of K ? Ans .0.1368/hour pls put it on paper

NH3 group in a co-ordination compound is named as

Differentiate between : a) Physical and chemical Equilibrium b) Physical and chemical process

in solid KHCO3,HCO3–(anion) ions exist as Monomer Dimer Polymer H+ & CO3(2-)

Find the number of atoms in 4.35g of NH3? And also find its mass ratio with hydrogen gas I.e H2?

The total number of lone pair of electrons on Xe atom in XeOF4 is