15280 + Interview Questions in Chemistry Page 172 InterviewSolution

8551.	The first step in the manufacture of nitric acid is the catalytic oxidation of ammonia. What is the name of the catalyst?
Answer» The first step in the manufacture of nitric acid is the catalytic oxidation of ammonia. What is the name of the catalyst?

Discussion

8552.	What is recrystallization?
Answer» What is recrystallization?

Discussion

8553.	Weight of metal and chlorine in a metal chloride are in 1/5 mass ratio . The equivalent weight of the metal will be (1) 14.2 (2) 7.1 (3) 24 (4) 5
Answer» Weight of metal and chlorine in a metal chloride are in 1/5 mass ratio . The equivalent weight of the metal will be (1) 14.2 (2) 7.1 (3) 24 (4) 5

Discussion

8554.	Calculate the concentration of nitric acid in miles per litre ina sample which has a density 1.41g/mL and the mass percent of nitric acid in it being 69percent.
Answer» Calculate the concentration of nitric acid in miles per litre ina sample which has a density 1.41g/mL and the mass percent of nitric acid in it being 69percent.

Discussion

8555.	37. Which of the following is strongest acid? H3PO4 H3PO3 H3PO2 All acids have same acidic strength
Answer» 37. Which of the following is strongest acid? H3PO4 H3PO3 H3PO2 All acids have same acidic strength

Discussion

8556.	what is lorentz force. is there is any formula for it
Answer» what is lorentz force. is there is any formula for it

Discussion

8557.	Chassez l'intrus.1. viande, jambon, poulet, tomate2. lait, crêpe, pain, gâteau3. bière, café, légume, coca4. orange, pomme, champignon, banane
Answer» Chassez l'intrus. 1. viande, jambon, poulet, tomate 2. lait, crêpe, pain, gâteau 3. bière, café, légume, coca 4. orange, pomme, champignon, banane

Discussion

8558.	A particle of mass m, charge Q and kinetic energy T enters a transverse uniform magnetic field of induction →B. What will be its kinetic energy after 3 seconds?
Answer» A particle of mass m, charge Q and kinetic energy T enters a transverse uniform magnetic field of induction $\to B$ . What will be its kinetic energy after 3 seconds?

Discussion

8559.	In the structure of rock salt if all the ions present at the body diagonal plane are removed find the new formula of rock salt
Answer» In the structure of rock salt if all the ions present at the body diagonal plane are removed find the new formula of rock salt

Discussion

8560.	When ethanol is heated with concentrated sulphuric acid at 170∘C, it gets converted into ethene. In this reaction, concentrated sulphuric acid acts as : (a) oxidising agent (b) catalyst (c) dehydrating agent (d) reducing agent
Answer» When ethanol is heated with concentrated sulphuric acid at $170^{\circ} C,$ it gets converted into ethene. In this reaction, concentrated sulphuric acid acts as : (a) oxidising agent (b) catalyst (c) dehydrating agent (d) reducing agent

Discussion

8561.	How can you decide a salt as a basic salt or acidic salt or neutral salt? Give some examples
Answer» How can you decide a salt as a basic salt or acidic salt or neutral salt? Give some examples

Discussion

8562.	The substitution reaction of propane with chlorine to form Octachloropropane will occur in
Answer» The substitution reaction of propane with chlorine to form Octachloropropane will occur in

Discussion

8563.	In the reaction sequence The product 'B' is
Answer» In the reaction sequence The product 'B' is

Discussion

8564.	(a) A metal M forms an oxide having the formula M2O3. It belongs to 3rd period in the modern periodic table. Write the atomic number and valency of the metal.(b) Write the formula of chloride of metal M.(c) What could metal M be?
Answer» (a) A metal M forms an oxide having the formula M₂O₃. It belongs to 3rd period in the modern periodic table. Write the atomic number and valency of the metal. (b) Write the formula of chloride of metal M. (c) What could metal M be?

Discussion

8565.	What is th molarity of benzene
Answer» What is th molarity of benzene

Discussion

8566.	hello, my self saloni i have i doubt for converting word equation to formula equation. i want to know what things i should know or learn for this. i have already learned valancy of first 20 elements,names and symbol of some ions.
Answer» hello, my self saloni i have i doubt for converting word equation to formula equation. i want to know what things i should know or learn for this. i have already learned valancy of first 20 elements,names and symbol of some ions.

8566.

hello, my self saloni i have i doubt for converting word equation to formula equation. i want to know what things i should know or learn for this. i have already learned valancy of first 20 elements,names and symbol of some ions.

Answer»

hello, my self saloni i have i doubt for converting word equation to formula equation.

i want to know what things i should know or learn for this. i have already learned valancy of first 20 elements,names and symbol of some ions.

Discussion

8567.	23.Number of Fe atom in 100g of Haemoglobin if it contains 0.33%Fe is?
Answer» 23.Number of Fe atom in 100g of Haemoglobin if it contains 0.33%Fe is?

Discussion

8568.	4.5 moles of calcium carbonate are reacted with dilute hydrochloric acid.(i) Write the equation for the reaction.(ii) What is the mass of 4.5 moles of calcium carbonate? (Relative molecular mass of calcium carbonate is 100).(iii) What is the volume of carbon dioxide liberated at stp?(iv) What mass of calcium chloride is formed? (Relative molecular mass of calcium chloride is 111)(v) How many moles of HCl are used in this reaction?
Answer» 4.5 moles of calcium carbonate are reacted with dilute hydrochloric acid. (i) Write the equation for the reaction. (ii) What is the mass of 4.5 moles of calcium carbonate? (Relative molecular mass of calcium carbonate is 100). (iii) What is the volume of carbon dioxide liberated at stp? (iv) What mass of calcium chloride is formed? (Relative molecular mass of calcium chloride is 111) (v) How many moles of HCl are used in this reaction?

Discussion

8569.	Select from the list given (a to e) one substance in each case which matches the description given in parts (i) to (v). (Note: Each substance is used only one in the answer.)(a) Nitroso Iron (II) sulphate(b) Iron (III) chloride(c) Chromium sulphate(d) Lead (II) chloride(e) Sodium chloride.(i) A compound which is deliquescent.(ii) A compound which is insoluble in cold water, but soluble in hot water.(iii) The compound responsible for the brown ring during the brown ring test of nitrate ion.(iv) A compound whose aqueous solution is neutral in nature.(v) The compound which is responsible for the green colouration when sulphur dioxide is passed through acidified potassium dichromate solution.
Answer» Select from the list given (a to e) one substance in each case which matches the description given in parts (i) to (v). (Note: Each substance is used only one in the answer.) (a) Nitroso Iron (II) sulphate (b) Iron (III) chloride (c) Chromium sulphate (d) Lead (II) chloride (e) Sodium chloride. (i) A compound which is deliquescent. (ii) A compound which is insoluble in cold water, but soluble in hot water. (iii) The compound responsible for the brown ring during the brown ring test of nitrate ion. (iv) A compound whose aqueous solution is neutral in nature. (v) The compound which is responsible for the green colouration when sulphur dioxide is passed through acidified potassium dichromate solution.

Discussion

8570.	What happens when baking soda reacts with vinegar?
Answer» What happens when baking soda reacts with vinegar?

Discussion

8571.	An increase in the conductivity equivalent of a weak electrolyte with dilution is primarily due to
Answer» An increase in the conductivity equivalent of a weak electrolyte with dilution is primarily due to

Discussion

8572.	ntFind the Hybridisation of Fe in Fe(Co) and check whether it is parmagnetic or diamagnetic.n
Answer» ntFind the Hybridisation of Fe in Fe(Co) and check whether it is parmagnetic or diamagnetic.n

Discussion

8573.	What is the difference between a wave and a radiation ?
Answer» What is the difference between a wave and a radiation ?

Discussion

8574.	76.Maximum electrons in d orbital or how many electrons can d orbital accommodate. 2 or 10 ?
Answer» 76.Maximum electrons in d orbital or how many electrons can d orbital accommodate. 2 or 10 ?

Discussion

8575.	in which group and period hydrogen should be placed 1. in mendeleev's periodic table 2. in modern periodic table
Answer» in which group and period hydrogen should be placed 1. in mendeleev's periodic table 2. in modern periodic table

Discussion

8576.	One mole of element X has 0.444times the mass of one mole of element Y. One atom of element X has 2.96 times the mass of one atom of C12. What is the atomic weight of Y?
Answer» One mole of element X has 0.444times the mass of one mole of element Y. One atom of element X has 2.96 times the mass of one atom of C12. What is the atomic weight of Y?

Discussion

8577.	What's the common name (not IUPAC) of the following haloalkane? CH3 CH2 CH Cl CH2 CH3
Answer» What's the common name (not IUPAC) of the following haloalkane? CH₃CH₂ CH Cl CH₂ CH₃

Discussion

8578.	Why should curd and sour substance not be kept in brass and copper vessel?
Answer» Why should curd and sour substance not be kept in brass and copper vessel?

Discussion

8579.	How many moles of magnesium phosphate will contain 0.25 mole of oxygen atoms ? Do it by unitary method.
Answer» How many moles of magnesium phosphate will contain 0.25 mole of oxygen atoms ? Do it by unitary method.

Discussion

8580.	Write the electronic configuration of two elements X and Y whose atomic numbers are 20 and 17 respectively. Write the molecular formula of the compound formed when element X reacts with element Y. Draw electron-dot of structure of the product and also state the nature of the bond formed between both the elements.
Answer» Write the electronic configuration of two elements X and Y whose atomic numbers are 20 and 17 respectively. Write the molecular formula of the compound formed when element X reacts with element Y. Draw electron-dot of structure of the product and also state the nature of the bond formed between both the elements.

Discussion

8581.	(a)Draw the electron dot structure for: (a) ethanoic acid(b)Draw the electron dot structure for:H2S(c)Draw the electron dot structure for:propanone(d)Draw the electron dot structure for: F2
Answer» (a) Draw the electron dot structure for: (a) ethanoic acid (b) Draw the electron dot structure for: $H_{2} S$ (c) Draw the electron dot structure for: propanone (d) Draw the electron dot structure for: $F_{2}$

Discussion

8582.	A student was given a white powder and asked to study the action of water on it. When the student added some water to this white powder, it set into a hard mass in about half an hour.(a) What is the common name and chemical formula of white powder?(b) Name its two uses.
Answer» A student was given a white powder and asked to study the action of water on it. When the student added some water to this white powder, it set into a hard mass in about half an hour. (a) What is the common name and chemical formula of white powder? (b) Name its two uses.

Discussion

8583.	Which of the following is a basic salt?
Answer» Which of the following is a basic salt?

Discussion

8584.	The atomic mass of carbon is 12 g and that of oxygen is 16 g. How many grams of carbon contains as many atoms as 100 g of oxygen?
Answer» The atomic mass of carbon is 12 g and that of oxygen is 16 g. How many grams of carbon contains as many atoms as 100 g of oxygen?

Discussion

8585.	The average atomic mass of a sample of an element X is 16.2 u. What are the percentages of isotopes 168X and 188Xin the sample?
Answer» The average atomic mass of a sample of an element X is 16.2 u. What are the percentages of isotopes $168 X a n d 188 X$ in the sample?

Discussion

8586.	Question 2Give any two ways in which biodegradable substances would affect the environment.
Answer» Question 2 Give any two ways in which biodegradable substances would affect the environment.

Discussion

8587.	Non-metals when dissolved in water form ___ oxides:
Answer» Non-metals when dissolved in water form ___ oxides:

Discussion

8588.	Define : (a) catalytic hydrogenation (b) oxidation (c) reduction (d) redox reaction
Answer» Define : (a) catalytic hydrogenation (b) oxidation (c) reduction (d) redox reaction

8588.

Define : (a) catalytic hydrogenation (b) oxidation (c) reduction (d) redox reaction

Answer»

Define :

(a) catalytic hydrogenation

(b) oxidation

(c) reduction

(d) redox reaction

Discussion

8589.	Predict the type of bonding (Electrovalent or Covalent) likely to be formed when pairs of elements having following atomic numbers combine: (i) 3 and 7 (ii) 6 and 9 (iii) 11 and 16 (iv) 14 and 12
Answer» Predict the type of bonding (Electrovalent or Covalent) likely to be formed when pairs of elements having following atomic numbers combine: (i) 3 and 7 (ii) 6 and 9 (iii) 11 and 16 (iv) 14 and 12

Discussion

8590.	Probablity of an event is p find probablity of it's complementary event
Answer» Probablity of an event is p find probablity of it's complementary event

Discussion

8591.	A solution of 0.4 gram sample of H2O2 reacted with 0.632 gram of KMnO4 in the presence of sulfuric acid calculate the percentage purity of sample of KMnO4
Answer» A solution of 0.4 gram sample of H2O2 reacted with 0.632 gram of KMnO4 in the presence of sulfuric acid calculate the percentage purity of sample of KMnO4

Discussion

8592.	20. 0.169 geam of copper is deposited on the cathode by current of 32 milliampere passing for 5 hrs through a solution of cuso4 find current efecincyyy 98 68 78 89%
Answer» 20. 0.169 geam of copper is deposited on the cathode by current of 32 milliampere passing for 5 hrs through a solution of cuso4 find current efecincyyy 98 68 78 89%

Discussion

8593.	The valence shell of carbon contains?
Answer» The valence shell of carbon contains?

Discussion

8594.	Name the gas produced on warming ammonium sulphate with sodium hydroxide solution.
Answer» Name the gas produced on warming ammonium sulphate with sodium hydroxide solution.

Discussion

8595.	200 ml of C2H4 was burnt in sufficient air ( containing 20% oxygen) as per the equation C2H4 + 3O 2 -------------> 2CO2 + 2H2O. Calculate the resultant mixture composition (at 1000 C and constant pressure).
Answer» 200 ml of C₂H₄was burnt in sufficient air ( containing 20% oxygen) as per the equation C₂H₄+ 3O ₂ -------------> 2CO₂+ 2H₂O. Calculate the resultant mixture composition (at 100⁰C and constant pressure).

Discussion

8596.	22. What is called activation energy?
Answer» 22. What is called activation energy?

Discussion

8597.	In which of the following reactions, hydrogen is acting as an oxidizing agent?
Answer» In which of the following reactions, hydrogen is acting as an oxidizing agent?

Discussion

8598.	21. The e.a of cl is 3.7 eV. How much energy in kcal is released when 2g of cl is completely converted to chloride ion in a gaseous state? (1 eV= 23.06 kcal/ mole)
Answer» 21. The e.a of cl is 3.7 eV. How much energy in kcal is released when 2g of cl is completely converted to chloride ion in a gaseous state? (1 eV= 23.06 kcal/ mole)

Discussion

8599.	Write the balanced chemical equations for the following reactions.(A) Calcium hydroxide + Carbon dioxide → Calcium carbonate + water(B) Zinc + Silver nitrate → Zinc nitrate + Silver(C) Aluminium + copper chloride → Aluminium chloride + Copper(D) Barium chloride + Potassium sulphate → Barium sulphate + Potassium chloride.
Answer» Write the balanced chemical equations for the following reactions. (A) Calcium hydroxide + Carbon dioxide → Calcium carbonate + water (B) Zinc + Silver nitrate → Zinc nitrate + Silver (C) Aluminium + copper chloride → Aluminium chloride + Copper (D) Barium chloride + Potassium sulphate → Barium sulphate + Potassium chloride.

Discussion

8600.	Give one example in each case:(a) A basic oxide which is soluble in water.(b) A hydroxide which is highly soluble in water.(c) A basic oxide which is insoluble in water.(d) A hydroxide which is insoluble in water.(e) A weak mineral acid.(f) A base which is not an alkali.(g) An oxide which is a base.(h) A hydrogen containing compound which is not an acid.
Answer» Give one example in each case: (a) A basic oxide which is soluble in water. (b) A hydroxide which is highly soluble in water. (c) A basic oxide which is insoluble in water. (d) A hydroxide which is insoluble in water. (e) A weak mineral acid. (f) A base which is not an alkali. (g) An oxide which is a base. (h) A hydrogen containing compound which is not an acid.

Discussion

Explore topic-wise InterviewSolutions in .

The first step in the manufacture of nitric acid is the catalytic oxidation of ammonia. What is the name of the catalyst?

What is recrystallization?

Weight of metal and chlorine in a metal chloride are in 1/5 mass ratio . The equivalent weight of the metal will be (1) 14.2 (2) 7.1 (3) 24 (4) 5

Calculate the concentration of nitric acid in miles per litre ina sample which has a density 1.41g/mL and the mass percent of nitric acid in it being 69percent.

37. Which of the following is strongest acid? H3PO4 H3PO3 H3PO2 All acids have same acidic strength

what is lorentz force. is there is any formula for it

Chassez l'intrus.1. viande, jambon, poulet, tomate2. lait, crêpe, pain, gâteau3. bière, café, légume, coca4. orange, pomme, champignon, banane

A particle of mass m, charge Q and kinetic energy T enters a transverse uniform magnetic field of induction →B. What will be its kinetic energy after 3 seconds?

In the structure of rock salt if all the ions present at the body diagonal plane are removed find the new formula of rock salt

When ethanol is heated with concentrated sulphuric acid at 170∘C, it gets converted into ethene. In this reaction, concentrated sulphuric acid acts as : (a) oxidising agent (b) catalyst (c) dehydrating agent (d) reducing agent

How can you decide a salt as a basic salt or acidic salt or neutral salt? Give some examples

The substitution reaction of propane with chlorine to form Octachloropropane will occur in

In the reaction sequence The product 'B' is

(a) A metal M forms an oxide having the formula M2O3. It belongs to 3rd period in the modern periodic table. Write the atomic number and valency of the metal.(b) Write the formula of chloride of metal M.(c) What could metal M be?

What is th molarity of benzene

hello, my self saloni i have i doubt for converting word equation to formula equation. i want to know what things i should know or learn for this. i have already learned valancy of first 20 elements,names and symbol of some ions.

23.Number of Fe atom in 100g of Haemoglobin if it contains 0.33%Fe is?

What happens when baking soda reacts with vinegar?

An increase in the conductivity equivalent of a weak electrolyte with dilution is primarily due to

ntFind the Hybridisation of Fe in Fe(Co) and check whether it is parmagnetic or diamagnetic.n

What is the difference between a wave and a radiation ?

76.Maximum electrons in d orbital or how many electrons can d orbital accommodate. 2 or 10 ?

in which group and period hydrogen should be placed 1. in mendeleev's periodic table 2. in modern periodic table

One mole of element X has 0.444times the mass of one mole of element Y. One atom of element X has 2.96 times the mass of one atom of C12. What is the atomic weight of Y?

What's the common name (not IUPAC) of the following haloalkane? CH​​​​3 CH​​​​​2 CH Cl CH​​​​​2 CH3

Why should curd and sour substance not be kept in brass and copper vessel?

How many moles of magnesium phosphate will contain 0.25 mole of oxygen atoms ? Do it by unitary method.

(a)Draw the electron dot structure for: ​(a) ethanoic acid(b)Draw the electron dot structure for:H2S(c)Draw the electron dot structure for:propanone(d)Draw the electron dot structure for: F2

A student was given a white powder and asked to study the action of water on it. When the student added some water to this white powder, it set into a hard mass in about half an hour.(a) What is the common name and chemical formula of white powder?​(b) Name its two uses.

Which of the following is a basic salt?

The atomic mass of carbon is 12 g and that of oxygen is 16 g. How many grams of carbon contains as many atoms as 100 g of oxygen?

The average atomic mass of a sample of an element X is 16.2 u. What are the percentages of isotopes 168X and 188Xin the sample?

Question 2Give any two ways in which biodegradable substances would affect the environment.

Non-metals when dissolved in water form ___ oxides:

Define : (a) catalytic hydrogenation (b) oxidation (c) reduction (d) redox reaction

Predict the type of bonding (Electrovalent or Covalent) likely to be formed when pairs of elements having following atomic numbers combine: (i) 3 and 7 (ii) 6 and 9 (iii) 11 and 16 (iv) 14 and 12

Probablity of an event is p find probablity of it's complementary event

A solution of 0.4 gram sample of H2O2 reacted with 0.632 gram of KMnO4 in the presence of sulfuric acid calculate the percentage purity of sample of KMnO4

20. 0.169 geam of copper is deposited on the cathode by current of 32 milliampere passing for 5 hrs through a solution of cuso4 find current efecincyyy 98 68 78 89%

The valence shell of carbon contains?

Name the gas produced on warming ammonium sulphate with sodium hydroxide solution.

22. What is called activation energy?

In which of the following reactions, hydrogen is acting as an oxidizing agent?

21. The e.a of cl is 3.7 eV. How much energy in kcal is released when 2g of cl is completely converted to chloride ion in a gaseous state? (1 eV= 23.06 kcal/ mole)

What's the common name (not IUPAC) of the following haloalkane? CH3 CH2 CH Cl CH2 CH3

(a)Draw the electron dot structure for: (a) ethanoic acid(b)Draw the electron dot structure for:H2S(c)Draw the electron dot structure for:propanone(d)Draw the electron dot structure for: F2

A student was given a white powder and asked to study the action of water on it. When the student added some water to this white powder, it set into a hard mass in about half an hour.(a) What is the common name and chemical formula of white powder?(b) Name its two uses.