7248 + Interview Questions in Chemistry Page 62 InterviewSolution

3051.	Difference between insoluble and soluble solid
Answer» Difference between insoluble and soluble solid

Discussion

3052.	Question 14Write the cations and anions present (if any) in the following compounds(a) CH3COONa(b) NaCl(c) H2(d) NH4NO3
Answer» Question 14 Write the cations and anions present (if any) in the following compounds (a) $C H_{3} C O O N a$ (b) $N a C l$ (c) $H_{2}$ (d) $N H_{4} N O_{3}$

Discussion

3053.	The condensed formula of propane is .
Answer» The condensed formula of propane is .

Discussion

3054.	Question 5(a)You are given a hammer, a battery, a bulb, wires and a switch.(a) How could you use them to distinguish between samples of metals and non-metals?
Answer» Question 5(a) You are given a hammer, a battery, a bulb, wires and a switch. (a) How could you use them to distinguish between samples of metals and non-metals?

Discussion

3055.	Name any two types of chemicals used in agriculture which cause water pollution.
Answer» Name any two types of chemicals used in agriculture which cause water pollution.

Discussion

3056.	How do metals oxide dissolved in water respond to litmus paper?
Answer» How do metals oxide dissolved in water respond to litmus paper?

Discussion

3057.	How to find the atomic valency
Answer» How to find the atomic valency

Discussion

3058.	Mark the correct answer.Rayon is different from other synthetic fibres because(a) it has a silk-like appearance.(b) it is obtained from wood pulp.(c) its fibres can also be woven like those of natural fibres.
Answer» Mark the correct answer. Rayon is different from other synthetic fibres because (a) it has a silk-like appearance. (b) it is obtained from wood pulp. (c) its fibres can also be woven like those of natural fibres.

Discussion

3059.	What is geothermal energy?
Answer» What is geothermal energy?

Discussion

3060.	A solution of a non electrolyte substance containing 1.05 g per 100 mL, was found to be isotonic with 3% glucose solution. The molecular mass of the substance is:
Answer» A solution of a non electrolyte substance containing $1.05 g$ per $100 mL$ , was found to be isotonic with $3 %$ glucose solution. The molecular mass of the substance is:

Discussion

3061.	why are double displacement reactions called precipitation reaction?
Answer» why are double displacement reactions called precipitation reaction?

Discussion

3062.	under the same conditions heat of formation of water and CO2 are -285, -394 kj /mol the heat of combustion of methane is -890 kj /mol the heat of formation of methane i
Answer» under the same conditions heat of formation of water and CO2 are -285, -394 kj /mol the heat of combustion of methane is -890 kj /mol the heat of formation of methane i

Discussion

3063.	Compare LPG and wood as fuels.
Answer» Compare LPG and wood as fuels.

Discussion

3064.	बाँस की बुनाई मानव के इतिहास में कब आरंभ हुई होगी?
Answer» बाँस की बुनाई मानव के इतिहास में कब आरंभ हुई होगी?

Discussion

3065.

Given the following data for the decomposition of ammonium nitrite in aqueos solution which follows first order kinetics. Calculate the value of rate constant (k) of the reaction. Time (minutes)10152025∞Volume of N2(c.c)6.259.0011.4013.6535.05

Answer»

Given the following data for the decomposition of ammonium nitrite in aqueos solution which follows first order kinetics. Calculate the value of rate constant (k) of the reaction.

Time (minutes)	10	15	20	25	$\infty$
Volume of $N_{2} (c . c)$	6.25	9.00	11.40	13.65	35.05

Discussion

3066.	DIFFERENtiate between matter and subs†an ce
Answer» DIFFERENtiate between matter and subs†an ce

Discussion

3067.	TYPE OF SALT IN PASHAN LAKE
Answer» TYPE OF SALT IN PASHAN LAKE

Discussion

3068.	What is the origin of the fibre Teflon?
Answer» What is the origin of the fibre Teflon?

Discussion

3069.	Which of the following best describes the characteristics of solids?
Answer» Which of the following best describes the characteristics of solids?

Discussion

3070.	Match List I (Ores) with List II (States where they are mined)
Answer» Match List I (Ores) with List II (States where they are mined)

3070.

Match List I (Ores) with List II (States where they are mined)

Answer»

Match List I (Ores) with List II (States where they are mined)

Discussion

3071.	explain the effect of voltage on continous and characteristics x-rays . also explain some other factors on which these x-rays depends
Answer» explain the effect of voltage on continous and characteristics x-rays . also explain some other factors on which these x-rays depends

Discussion

3072.	Correct the following incorrect statements:1. The first shell in Bohr's Atomic model is represented by the letter "A".2. The maximum number of electrons that can go in the shell "N" is 48.3. The mass number of an atom equals the sum of the number of protons and electrons present in the nucleus of an atom.
Answer» Correct the following incorrect statements: 1. The first shell in Bohr's Atomic model is represented by the letter "A". 2. The maximum number of electrons that can go in the shell "N" is 48. 3. The mass number of an atom equals the sum of the number of protons and electrons present in the nucleus of an atom.

Discussion

3073.	From the formula of water H2O, work out the valencies of hydrogen and oxygen.
Answer» From the formula of water H₂O, work out the valencies of hydrogen and oxygen.

Discussion

3074.	Write a short note on anthracite.
Answer» Write a short note on anthracite.

Discussion

3075.	Although rayon is obtained from a natural source,wood pulp, yet it is a man-made fibre.why?
Answer» Although rayon is obtained from a natural source,wood pulp, yet it is a man-made fibre.why?

Discussion

3076.	Fill in the blanks.A. Electron, proton, neutron are the types of _________ in an atom.B. An electron carries a _________charge.C. The electron shell _____________ is nearest to the nucleus.D. The electronic configuration magnesium is 2, 8, 2. From this it is understood that the valence shell of magnesium is_____________E. The valency of hydrogen is 'one as per the molecular formula H2O . Therefore valency of 'Fe' turns out to be ______________ as per the formula Fe2O3.
Answer» Fill in the blanks. A. Electron, proton, neutron are the types of _________ in an atom. B. An electron carries a _________charge. C. The electron shell _____________ is nearest to the nucleus. D. The electronic configuration magnesium is 2, 8, 2. From this it is understood that the valence shell of magnesium is_____________ E. The valency of hydrogen is 'one as per the molecular formula H₂O . Therefore valency of 'Fe' turns out to be ______________ as per the formula Fe₂O₃.

Discussion

3077.	Write some properties and uses of melamine.
Answer» Write some properties and uses of melamine.

Discussion

3078.	Explain why, when a burning candle is covered with an inverted gas jar, the candle gets extinguished after some time.
Answer» Explain why, when a burning candle is covered with an inverted gas jar, the candle gets extinguished after some time.

Discussion

3079.	By dissolving 13.6 g of a substance in 20 g of water, the freezing point decreased by 3.7∘C. Calculate the molecular mass of the substance. (Molal depression constant for water = 1.863K kg mol−1)
Answer» By dissolving $13.6 g$ of a substance in $20 g$ of water, the freezing point decreased by ${3.7}^{\circ} C$ . Calculate the molecular mass of the substance. (Molal depression constant for water = $1.863 K k g m o l^{- 1}$ )

Discussion

3080.	On long exposure to moist air, a copper vessel lose its lustre and acquire a coating of basic copper carbonate which is ( colour ) ?
Answer» On long exposure to moist air, a copper vessel lose its lustre and acquire a coating of basic copper carbonate which is ( colour ) ?

Discussion

3081.	Which place in Tamil Nadu is utilizing wind energy to a great extent?
Answer» Which place in Tamil Nadu is utilizing wind energy to a great extent?

Discussion

3082.	Explain this equation E barium +E krypton - E uranium +2 neutron = 200 mev
Answer» Explain this equation E barium +E krypton - E uranium +2 neutron = 200 mev

Discussion

3083.	Give scientific reasons. (a) Gold and silver are used is coins. (b) Ornaments are generally not made from 24-carat gold. (c) Ships are painted at frequent intervals. (d) Gold and platinum are called noble elements. (e) Stainless steel has more lustre than iron.
Answer» Give scientific reasons. (a) Gold and silver are used is coins. (b) Ornaments are generally not made from 24-carat gold. (c) Ships are painted at frequent intervals. (d) Gold and platinum are called noble elements. (e) Stainless steel has more lustre than iron.

3083.

Give scientific reasons. (a) Gold and silver are used is coins. (b) Ornaments are generally not made from 24-carat gold. (c) Ships are painted at frequent intervals. (d) Gold and platinum are called noble elements. (e) Stainless steel has more lustre than iron.

Answer»

Give scientific reasons.

(a) Gold and silver are used is coins.

(b) Ornaments are generally not made from 24-carat gold.

(c) Ships are painted at frequent intervals.

(d) Gold and platinum are called noble elements.

(e) Stainless steel has more lustre than iron.

Discussion

3084.	What are biodegradable and non-biodegradable substances?
Answer» What are biodegradable and non-biodegradable substances?

Discussion

3085.	Which energy is stored in cattle dung?
Answer» Which energy is stored in cattle dung?

Discussion

3086.	Incomplete combustion results in the formation of:
Answer» Incomplete combustion results in the formation of:

Discussion

3087.	A small quantity of curd is added to warm milk. The milk is stirred and is set aside for few hours at a warm place. In a few hours, the curd is formed. This is an irreversible change because
Answer» A small quantity of curd is added to warm milk. The milk is stirred and is set aside for few hours at a warm place. In a few hours, the curd is formed. This is an irreversible change because

3087.

A small quantity of curd is added to warm milk. The milk is stirred and is set aside for few hours at a warm place. In a few hours, the curd is formed. This is an irreversible change because

Answer»

A small quantity of curd is added to warm milk. The milk is stirred and is set aside for few hours at a warm place. In a few hours, the curd is formed. This is an irreversible change because

Discussion

3088.	Different between evaporation and vaporation
Answer» Different between evaporation and vaporation

Discussion

3089.	___ is the naturally occurring chemical in turmeric.
Answer» ___ is the naturally occurring chemical in turmeric.

Discussion

3090.	Which of the following is a polyester fabric?
Answer» Which of the following is a polyester fabric?

Discussion

3091.	Question 3What are alloys?
Answer» Question 3 What are alloys?

Discussion

3092.	What are the two structural parts of an atom ?
Answer» What are the two structural parts of an atom ?

Discussion

3093.	Discuss the observations that helped E. Rutherford conclude the concept of a concentrated nucleus.
Answer» Discuss the observations that helped E. Rutherford conclude the concept of a concentrated nucleus.

Discussion

3094.	55. What is noble reactivity series
Answer» 55. What is noble reactivity series

Discussion

3095.	Identify the elements present in aluminium chloride.
Answer» Identify the elements present in aluminium chloride.

Discussion

3096.	Rashi took out a non metal out of water. It caught fire as soon as it was taken out of the water. Which substance is this?
Answer» Rashi took out a non metal out of water. It caught fire as soon as it was taken out of the water. Which substance is this?

Discussion

3097.	Assertion: Bakelite is a thermosetting polymer.Reason: On heating, polymeric chain becomes a long and straight chain.
Answer» Assertion: Bakelite is a thermosetting polymer. Reason: On heating, polymeric chain becomes a long and straight chain.

Discussion

3098.	___________ is the process of sterilization of water by addition of chlorine acts as a treatment against bacterial infection.
Answer» ___________ is the process of sterilization of water by addition of chlorine acts as a treatment against bacterial infection.

Discussion

3099.	34. PbI2 has maximum solubility in 1)0.1M PbCl2 2)0.01M CaI2 3)0.01M KI 4)0.01M NaI
Answer» 34. PbI2 has maximum solubility in 1)0.1M PbCl2 2)0.01M CaI2 3)0.01M KI 4)0.01M NaI

Discussion

3100.	What molecules in fossil fuels are made from carbon and hydrogen?
Answer» What molecules in fossil fuels are made from carbon and hydrogen?

Discussion

Explore topic-wise InterviewSolutions in .

Difference between insoluble and soluble solid

Question 14Write the cations and anions present (if any) in the following compounds(a) CH3COONa(b) NaCl(c) H2(d) NH4NO3

The condensed formula of propane is .

Question 5(a)You are given a hammer, a battery, a bulb, wires and a switch.(a) How could you use them to distinguish between samples of metals and non-metals?

Name any two types of chemicals used in agriculture which cause water pollution.

How do metals oxide dissolved in water respond to litmus paper?

How to find the atomic valency

Mark the correct answer.Rayon is different from other synthetic fibres because(a) it has a silk-like appearance.(b) it is obtained from wood pulp.(c) its fibres can also be woven like those of natural fibres.

What is geothermal energy?

A solution of a non electrolyte substance containing 1.05 g per 100 mL, was found to be isotonic with 3% glucose solution. The molecular mass of the substance is:

why are double displacement reactions called precipitation reaction?

under the same conditions heat of formation of water and CO2 are -285, -394 kj /mol the heat of combustion of methane is -890 kj /mol the heat of formation of methane i

Compare LPG and wood as fuels.

बाँस की बुनाई मानव के इतिहास में कब आरंभ हुई होगी?

Given the following data for the decomposition of ammonium nitrite in aqueos solution which follows first order kinetics. Calculate the value of rate constant (k) of the reaction. Time (minutes)10152025∞Volume of N2(c.c)6.259.0011.4013.6535.05

DIFFERENtiate between matter and subs†an ce

TYPE OF SALT IN PASHAN LAKE

What is the origin of the fibre Teflon?

Which of the following best describes the characteristics of solids?

Match List I (Ores) with List II (States where they are mined)

explain the effect of voltage on continous and characteristics x-rays . also explain some other factors on which these x-rays depends

From the formula of water H2O, work out the valencies of hydrogen and oxygen.

Write a short note on anthracite.

Although rayon is obtained from a natural source,wood pulp, yet it is a man-made fibre.why?

Write some properties and uses of melamine.

Explain why, when a burning candle is covered with an inverted gas jar, the candle gets extinguished after some time.

By dissolving 13.6 g of a substance in 20 g of water, the freezing point decreased by 3.7∘C. Calculate the molecular mass of the substance. (Molal depression constant for water = 1.863K kg mol−1)

On long exposure to moist air, a copper vessel lose its lustre and acquire a coating of basic copper carbonate which is ( colour ) ?

Which place in Tamil Nadu is utilizing wind energy to a great extent?

Explain this equation E barium +E krypton - E uranium +2 neutron = 200 mev

Give scientific reasons. (a) Gold and silver are used is coins. (b) Ornaments are generally not made from 24-carat gold. (c) Ships are painted at frequent intervals. (d) Gold and platinum are called noble elements. (e) Stainless steel has more lustre than iron.

What are biodegradable and non-biodegradable substances?

Which energy is stored in cattle dung?

Incomplete combustion results in the formation of:

A small quantity of curd is added to warm milk. The milk is stirred and is set aside for few hours at a warm place. In a few hours, the curd is formed. This is an irreversible change because

Different between evaporation and vaporation

___ is the naturally occurring chemical in turmeric.

Which of the following is a polyester fabric?

Question 3What are alloys?

What are the two structural parts of an atom ?

Discuss the observations that helped E. Rutherford conclude the concept of a concentrated nucleus.

55. What is noble reactivity series

Identify the elements present in aluminium chloride.

Rashi took out a non metal out of water. It caught fire as soon as it was taken out of the water. Which substance is this?

Assertion: Bakelite is a thermosetting polymer.Reason: On heating, polymeric chain becomes a long and straight chain.

___________ is the process of sterilization of water by addition of chlorine acts as a treatment against bacterial infection.

34. PbI2 has maximum solubility in 1)0.1M PbCl2 2)0.01M CaI2 3)0.01M KI 4)0.01M NaI

What molecules in fossil fuels are made from carbon and hydrogen?