15280 + Interview Questions in Chemistry Page 30 InterviewSolution

1451.	Identify the type of the reaction given below:2KClO3(s)Heat−−→2KCl(s)+3O2(g)
Answer» Identify the type of the reaction given below: $2 {KClO}_{3} (s) Heat - - \to 2 KCl(s) + 3 O_{2} (g)$

Discussion

1452.	Difference between the coordinated interstitial and hydrogen bonded water
Answer» Difference between the coordinated interstitial and hydrogen bonded water

Discussion

1453.	How many moles of N2 are needed to produce 8.2 moles of NH3 by reaction with H2?
Answer» How many moles of $N_{2}$ are needed to produce 8.2 moles of $N H_{3}$ by reaction with $H_{2}$ ?

Discussion

1454.	Analyze the given diagram and identify A and B.
Answer» Analyze the given diagram and identify A and B.

Discussion

1455.	What happens when ammonia solution is added(a) dropwise and then(b) in excess to the following solutions:(i) CuSO4(ii) ZnSO4(iii) FeCl3(c) write balanced reactions.
Answer» What happens when ammonia solution is added (a) dropwise and then (b) in excess to the following solutions: (i) CuSO₄ (ii) ZnSO₄ (iii) FeCl₃ (c) write balanced reactions.

Discussion

1456.	18. In huckels rule n represent 1- no. of electron or no. of pi bond ?
Answer» 18. In huckels rule n represent 1- no. of electron or no. of pi bond ?

Discussion

1457.	The angle strain in cyclopentane is
Answer» The angle strain in cyclopentane is

Discussion

1458.	When a piece of sodium metal is added to ethanol, the gas formed with effervescence is .............
Answer» When a piece of sodium metal is added to ethanol, the gas formed with effervescence is .............

Discussion

1459.	Pb+2KOH(hot conc.)→___+___
Answer» $P b + 2 K O H (h o t c o n c .)$ $\to$ ___+___

Discussion

1460.	If 340 g of a mixture of N_2 and H_2 in the correct ratio gave a 20% yield of NH_3. The mass produced would be : (a) 16 g (b) 17 g (c) 20 g (d) 68
Answer» If 340 g of a mixture of N_2 and H_2 in the correct ratio gave a 20% yield of NH_3. The mass produced would be : (a) 16 g (b) 17 g (c) 20 g (d) 68

Discussion

1461.	41. On thermal decomposition of 600g of lime stone 44.8L of co2 is released at STP. The percentage purity of lime stone is
Answer» 41. On thermal decomposition of 600g of lime stone 44.8L of co2 is released at STP. The percentage purity of lime stone is

Discussion

1462.	ntTell the chemical constituents present in soap and perfumesn
Answer» ntTell the chemical constituents present in soap and perfumesn

Discussion

1463.	in the structural formula of acteic acid why their are two lines towards the oxygen?
Answer» in the structural formula of acteic acid why their are two lines towards the oxygen?

Discussion

1464.	Question 1.2A solution of a substance ‘X’ is used for white washing.Write the reaction of the substance ‘X’ named above with water.
Answer» Question 1.2 A solution of a substance ‘X’ is used for white washing. Write the reaction of the substance ‘X’ named above with water.

Discussion

1465.	How ammonia occurs in nature?
Answer» How ammonia occurs in nature?

Discussion

1466.	The doctor who ____the surgery ____her a better health by September.
Answer» The doctor who ____the surgery ____her a better health by September.

Discussion

1467.	1. Sequence of oxidising agent and reason HClO4, HClO3, HClO2, HClO
Answer» 1. Sequence of oxidising agent and reason HClO4, HClO3, HClO2, HClO

Discussion

1468.	Which is good conductor of electricity Graphite or Diamond?
Answer» Which is good conductor of electricity Graphite or Diamond?

Discussion

1469.	out of Li , C and N which form the most basic oxide and which form the most acidic oxide?
Answer» out of Li , C and N which form the most basic oxide and which form the most acidic oxide?

Discussion

1470.	How aluminium amphoteric reaction is formed ??? With hcl and naoh
Answer» How aluminium amphoteric reaction is formed ??? With hcl and naoh

1470.

How aluminium amphoteric reaction is formed ??? With hcl and naoh

Answer»

How aluminium amphoteric reaction is formed ???

With hcl and naoh

Discussion

1471.	Is NaCl dissociate in water due to polar structure of water
Answer» Is NaCl dissociate in water due to polar structure of water

Discussion

1472.	HOW IS MILK OF MAGNASIA FORMED (EQUATION)
Answer» HOW IS MILK OF MAGNASIA FORMED (EQUATION)

Discussion

1473.	A compound contains 87.5% by mass of nitrogen and 12.5% by mass of hydrogen. Determine the empirical formula of this compound.
Answer» A compound contains 87.5% by mass of nitrogen and 12.5% by mass of hydrogen. Determine the empirical formula of this compound.

Discussion

1474.	Match the following polymers with their usage: PolymerUsage(i) Polyvinylchloride(a) Non- stick coating(ii) Polyethene(b) Plastic(iii) Polyisoprene(c) Pipes(iv) Teflon(d) Natural rubber
Answer» Match the following polymers with their usage: $\begin{matrix} Polymer & Usage (i) Polyvinylchloride & (a) Non- stick coating (ii) Polyethene & (b) Plastic (iii) Polyisoprene & (c) Pipes (iv) Teflon & (d) Natural rubber \end{matrix}$

Discussion

1475.	Question 14. Which of the following statements is correct about an aqueous solution of an acid and a base?(i) Higher the pH, stronger the acid(ii) Higher the pH, weaker the acid(iii) Lower the pH, stronger the base(iv) Lower the pH, weaker the baseChoose the correct option from the following:(a) (i) and (iii)(b) (ii) and (iii)(c) (i) and (iv)(d) (ii) and (iv)
Answer» Question 14. Which of the following statements is correct about an aqueous solution of an acid and a base? (i) Higher the pH, stronger the acid (ii) Higher the pH, weaker the acid (iii) Lower the pH, stronger the base (iv) Lower the pH, weaker the base Choose the correct option from the following: (a) (i) and (iii) (b) (ii) and (iii) (c) (i) and (iv) (d) (ii) and (iv)

1475.

Question 14. Which of the following statements is correct about an aqueous solution of an acid and a base?(i) Higher the pH, stronger the acid(ii) Higher the pH, weaker the acid(iii) Lower the pH, stronger the base(iv) Lower the pH, weaker the baseChoose the correct option from the following:(a) (i) and (iii)(b) (ii) and (iii)(c) (i) and (iv)(d) (ii) and (iv)

Answer»

Question 14.

Which of the following statements is correct about an aqueous solution of an acid and a base?

(i) Higher the pH, stronger the acid

(ii) Higher the pH, weaker the acid

(iii) Lower the pH, stronger the base

(iv) Lower the pH, weaker the base

Choose the correct option from the following:

(a) (i) and (iii)

(b) (ii) and (iii)

(c) (i) and (iv)

(d) (ii) and (iv)

Discussion

1476.	Which type of hydrocarbons are alkenes and alkynes?
Answer» Which type of hydrocarbons are alkenes and alkynes?

Discussion

1477.	What is the difference between disproportionation reaction and intramolecular redox reaction?
Answer» What is the difference between disproportionation reaction and intramolecular redox reaction?

Discussion

1478.	A catalyst does not change the position of equilibrium of a reversible reaction because it increases the rate of
Answer» A catalyst does not change the position of equilibrium of a reversible reaction because it increases the rate of

Discussion

1479.	What is alloy steel?
Answer» What is alloy steel?

Discussion

1480.	Which of the following is/are a property of metals?
Answer» Which of the following is/are a property of metals?

Discussion

1481.	The cooking gas used in our homes is mainly an:
Answer» The cooking gas used in our homes is mainly an:

Discussion

1482.	How to identify whether a given solid is molecular or covalent solid?(SiC)
Answer» How to identify whether a given solid is molecular or covalent solid?(SiC)

Discussion

1483.	Is growth a chemical process ? If yes, can it be represented as a chemical equation?
Answer» Is growth a chemical process ? If yes, can it be represented as a chemical equation?

Discussion

1484.	What physical and chemical properties of elements were used by Mendeleev in creating his periodic table? List two observations which posed a challenge to Mendeleev's Periodic Law.
Answer» What physical and chemical properties of elements were used by Mendeleev in creating his periodic table? List two observations which posed a challenge to Mendeleev's Periodic Law.

Discussion

1485.	Ionization energy of f-(fluoride ion) and f (fluorine),which is more?
Answer» Ionization energy of f-(fluoride ion) and f (fluorine),which is more?

Discussion

1486.	The chemical name of caustic soda isa. sodium hydroxideb. ammonium hydroxidec. potassium hydroxided. magnesium hydroxide
Answer» The chemical name of caustic soda is a. sodium hydroxide b. ammonium hydroxide c. potassium hydroxide d. magnesium hydroxide

Discussion

1487.	Which one out of NaCl and MgO have high melting point and why
Answer» Which one out of NaCl and MgO have high melting point and why

Discussion

1488.	13. Apart from activation energy do catalyst effects rate constant too?
Answer» 13. Apart from activation energy do catalyst effects rate constant too?

Discussion

1489.	1) write the balanced chemical equation for the preparation of bleaching powder. Write the uses( other than bleaching).
Answer» 1) write the balanced chemical equation for the preparation of bleaching powder. Write the uses( other than bleaching).

Discussion

1490.	Question 37.How would you distinguish between baking powder and washing soda by heating ?
Answer» Question 37. How would you distinguish between baking powder and washing soda by heating ?

Discussion

1491.	why is the weight of platinum iridium alloy is chosen as the standard weight, i.e ikg, while other alloys are not taken into consideration?
Answer» why is the weight of platinum iridium alloy is chosen as the standard weight, i.e ikg, while other alloys are not taken into consideration?

Discussion

1492.	In the extraction of metallic zinc from zinc oxide, the reducing agent used is __.
Answer» In the extraction of metallic zinc from zinc oxide, the reducing agent used is __.

Discussion

1493.	how to easily identify whether a molecule has a dative bond or not
Answer» how to easily identify whether a molecule has a dative bond or not

Discussion

1494.	(a) Why does the size of the atoms progressively become smaller when we move from sodium (Na) to chlorine (Cl) in the third period of the periodic table? (b) Helium and neon are unreactive gases. What, if anything, do their atoms have in common?
Answer» (a) Why does the size of the atoms progressively become smaller when we move from sodium (Na) to chlorine (Cl) in the third period of the periodic table? (b) Helium and neon are unreactive gases. What, if anything, do their atoms have in common?

1494.

(a) Why does the size of the atoms progressively become smaller when we move from sodium (Na) to chlorine (Cl) in the third period of the periodic table? (b) Helium and neon are unreactive gases. What, if anything, do their atoms have in common?

Answer»

(a) Why does the size of the atoms progressively become smaller when we move from sodium (Na) to chlorine (Cl) in the third period of the periodic table?

(b) Helium and neon are unreactive gases. What, if anything, do their atoms have in common?

Discussion

1495.	state 2 characters of the chemical reaction which takes place when dilute sulphuric acid is poured over zinc granules
Answer» state 2 characters of the chemical reaction which takes place when dilute sulphuric acid is poured over zinc granules

Discussion

1496.	How to determine which gas is more liquifiable?
Answer» How to determine which gas is more liquifiable?

Discussion

1497.	11.What is the meaning of reacting the alkene with dilute or concentrated acid
Answer» 11.What is the meaning of reacting the alkene with dilute or concentrated acid

Discussion

1498.	The three elements having chemical symbols of Si, B and Ge are : (a) all metals (b) all non-metals (c) all metalloids (d) Si is metalloid, B is metal and Ge is non-metal
Answer» The three elements having chemical symbols of Si, B and Ge are : (a) all metals (b) all non-metals (c) all metalloids (d) Si is metalloid, B is metal and Ge is non-metal

1498.

The three elements having chemical symbols of Si, B and Ge are : (a) all metals (b) all non-metals (c) all metalloids (d) Si is metalloid, B is metal and Ge is non-metal

Answer»

The three elements having chemical symbols of Si, B and Ge are :

(a) all metals (b) all non-metals

(c) all metalloids (d) Si is metalloid, B is metal and Ge is non-metal

Discussion

1499.	Which of the following correctly represents 360 g of water?(i) 2 moles of H2O(ii) 20 moles of water(iii) 6.022×1023 molecules of water(iv) 1.2044×1025 molecules of water(a) (i)(b) (i) and (iv)(c) (ii) and (iii)(d) (ii) and (iv)
Answer» Which of the following correctly represents 360 g of water? (i) $2 m o l e s o f$ $H_{2} O$ (ii) $20 m o l e s o f w a t e r$ (iii) $6.022 \times 10^{23} m o l e c u l e s o f w a t e r$ (iv) $1.2044 \times 10^{25} m o l e c u l e s o f w a t e r$ (a) (i) (b) (i) and (iv) (c) (ii) and (iii) (d) (ii) and (iv)

1499.

Which of the following correctly represents 360 g of water?(i) 2 moles of H2O(ii) 20 moles of water(iii) 6.022×1023 molecules of water(iv) 1.2044×1025 molecules of water(a) (i)(b) (i) and (iv)(c) (ii) and (iii)(d) (ii) and (iv)

Answer»

Which of the following correctly represents 360 g of water?

(i) $2 m o l e s o f$ $H_{2} O$

(ii) $20 m o l e s o f w a t e r$

(iii) $6.022 \times 10^{23} m o l e c u l e s o f w a t e r$

(iv) $1.2044 \times 10^{25} m o l e c u l e s o f w a t e r$

(a) (i)

(b) (i) and (iv)

(c) (ii) and (iii)

(d) (ii) and (iv)

Discussion

1500.	Why H3PO4 is a tribasic and H3PO3 is a dibasic acid?
Answer» Why $H_{3} P O_{4}$ is a tribasic and $H_{3} P O_{3}$ is a dibasic acid?

Discussion

Explore topic-wise InterviewSolutions in .

Identify the type of the reaction given below:2KClO3(s)Heat−−→2KCl(s)+3O2(g)

Difference between the coordinated interstitial and hydrogen bonded water

How many moles of N2 are needed to produce 8.2 moles of NH3 by reaction with H2?

Analyze the given diagram and identify A and B.

What happens when ammonia solution is added(a) dropwise and then(b) in excess to the following solutions:(i) CuSO4(ii) ZnSO4(iii) FeCl3(c) write balanced reactions.

18. In huckels rule n represent 1- no. of electron or no. of pi bond ?

The angle strain in cyclopentane is

When a piece of sodium metal is added to ethanol, the gas formed with effervescence is .............

Pb+2KOH(hot conc.)→___+___

If 340 g of a mixture of N_2 and H_2 in the correct ratio gave a 20% yield of NH_3. The mass produced would be : (a) 16 g (b) 17 g (c) 20 g (d) 68

41. On thermal decomposition of 600g of lime stone 44.8L of co2 is released at STP. The percentage purity of lime stone is

ntTell the chemical constituents present in soap and perfumesn

in the structural formula of acteic acid why their are two lines towards the oxygen?

Question 1.2A solution of a substance ‘X’ is used for white washing.Write the reaction of the substance ‘X’ named above with water.

How ammonia occurs in nature?

The doctor who ____the surgery ____her a better health by September.

1. Sequence of oxidising agent and reason HClO4, HClO3, HClO2, HClO

Which is good conductor of electricity Graphite or Diamond?

out of Li , C and N which form the most basic oxide and which form the most acidic oxide?

How aluminium amphoteric reaction is formed ??? With hcl and naoh

Is NaCl dissociate in water due to polar structure of water

HOW IS MILK OF MAGNASIA FORMED (EQUATION)

A compound contains 87.5% by mass of nitrogen and 12.5% by mass of hydrogen. Determine the empirical formula of this compound.

Match the following polymers with their usage: PolymerUsage(i) Polyvinylchloride(a) Non- stick coating(ii) Polyethene(b) Plastic(iii) Polyisoprene(c) Pipes(iv) Teflon(d) Natural rubber

Which type of hydrocarbons are alkenes and alkynes?

What is the difference between disproportionation reaction and intramolecular redox reaction?

A catalyst does not change the position of equilibrium of a reversible reaction because it increases the rate of

What is alloy steel?

Which of the following is/are a property of metals?

The cooking gas used in our homes is mainly an:

How to identify whether a given solid is molecular or covalent solid?(SiC)

Is growth a chemical process ? If yes, can it be represented as a chemical equation?

What physical and chemical properties of elements were used by Mendeleev in creating his periodic table? List two observations which posed a challenge to Mendeleev's Periodic Law.

Ionization energy of f-(fluoride ion) and f (fluorine),which is more?

The chemical name of caustic soda isa. sodium hydroxideb. ammonium hydroxidec. potassium hydroxided. magnesium hydroxide

Which one out of NaCl and MgO have high melting point and why

13. Apart from activation energy do catalyst effects rate constant too?

1) write the balanced chemical equation for the preparation of bleaching powder. Write the uses( other than bleaching).

Question 37.How would you distinguish between baking powder and washing soda by heating ?

why is the weight of platinum iridium alloy is chosen as the standard weight, i.e ikg, while other alloys are not taken into consideration?

In the extraction of metallic zinc from zinc oxide, the reducing agent used is __.

how to easily identify whether a molecule has a dative bond or not

(a) Why does the size of the atoms progressively become smaller when we move from sodium (Na) to chlorine (Cl) in the third period of the periodic table? (b) Helium and neon are unreactive gases. What, if anything, do their atoms have in common?

state 2 characters of the chemical reaction which takes place when dilute sulphuric acid is poured over zinc granules

How to determine which gas is more liquifiable?

11.What is the meaning of reacting the alkene with dilute or concentrated acid

The three elements having chemical symbols of Si, B and Ge are : (a) all metals (b) all non-metals (c) all metalloids (d) Si is metalloid, B is metal and Ge is non-metal

Which of the following correctly represents 360 g of water?(i) 2 moles of H2O(ii) 20 moles of water(iii) 6.022×1023 molecules of water(iv) 1.2044×1025 molecules of water(a) (i)(b) (i) and (iv)(c) (ii) and (iii)(d) (ii) and (iv)

Why H3PO4 is a tribasic and H3PO3 is a dibasic acid?

Pb+2KOH(hot conc.)→_+_

The doctor who the surgery her a better health by September.