7248 + Interview Questions in Chemistry Page 78 InterviewSolution

3851.	What will be the chemical formula for aluminium oxide?
Answer» What will be the chemical formula for aluminium oxide?

Discussion

3852.	Complete the following reaction Fe2O3+3CΔ→ 2Fe+ _________
Answer» Complete the following reaction $F e_{2} O_{3} + 3 C Δ \to 2 F e +$ _________

Discussion

3853.	Question 9Choose the correct statement about inflammable substances from the following.They have:(a) low ignition temperature and cannot catch fire easily(b) high ignition temperature and can catch fire easily(c) low ignition temperature and can catch fire easily.(d) high ignition temperature and cannot catch fire easily.
Answer» Question 9 Choose the correct statement about inflammable substances from the following.They have: (a) low ignition temperature and cannot catch fire easily (b) high ignition temperature and can catch fire easily (c) low ignition temperature and can catch fire easily. (d) high ignition temperature and cannot catch fire easily.

Discussion

3854.	What is kinetic energy
Answer» What is kinetic energy

Discussion

3855.	Question 32Why petrol is exhaustible natural resource, whereas sunlight is not? Explain.
Answer» Question 32 Why petrol is exhaustible natural resource, whereas sunlight is not? Explain.

Discussion

3856.	How transparent things can allow light to pass through them?
Answer» How transparent things can allow light to pass through them?

Discussion

3857.	What are the three common states of matter? Explain each with suitable example examples.
Answer» What are the three common states of matter? Explain each with suitable example examples.

Discussion

3858.	Which of the following sets comprises of natural fibres only?
Answer» Which of the following sets comprises of natural fibres only?

Discussion

3859.	What is the latin name of potassium?
Answer» What is the latin name of potassium?

Discussion

3860.	When water boils, its molecules start moving faster and many of them escape from water. Is boiling a chemical or a physical change?
Answer» When water boils, its molecules start moving faster and many of them escape from water. Is boiling a chemical or a physical change?

Discussion

3861.	Which is the correct answer about the states of substances I, II and III with reference to the following picture?
Answer» Which is the correct answer about the states of substances I, II and III with reference to the following picture?

3861.

Which is the correct answer about the states of substances I, II and III with reference to the following picture?

Answer»

Which is the correct answer about the states of substances I, II and III with reference to the following picture?

Discussion

3862.	Question 3 (c)Like synthetic fibres, plastic is also a _________.
Answer» Question 3 (c) Like synthetic fibres, plastic is also a _________.

Discussion

3863.	Question 27What are the environmental consequences of using fossil fuels? Suggest the steps to minimize the pollution caused by various sources of energy including non-conventional sources of energy.
Answer» Question 27 What are the environmental consequences of using fossil fuels? Suggest the steps to minimize the pollution caused by various sources of energy including non-conventional sources of energy.

Discussion

3864.	What is electroplating
Answer» What is electroplating

Discussion

3865.	Given that saccharin has a molar mass of 183.18 g/mol, how many saccharinmolecules are in a 40.0-mg (0.0400-g) sample of saccharin? How many carbonatoms are in the same sample?
Answer» Given that saccharin has a molar mass of 183.18 g/mol, how many saccharin molecules are in a 40.0-mg (0.0400-g) sample of saccharin? How many carbon atoms are in the same sample?

Discussion

3866.	A & B are 2 points on the – axis & y – axis respectively. P (3, –2) is midpoint of AB. Find the coordinates of A & B, slope of AB & its equation.
Answer» A & B are 2 points on the – axis & y – axis respectively. P (3, –2) is midpoint of AB. Find the coordinates of A & B, slope of AB & its equation.

3866.

A & B are 2 points on the – axis & y – axis respectively. P (3, –2) is midpoint of AB. Find the coordinates of A & B, slope of AB & its equation.

Answer»

A & B are 2 points on the – axis & y – axis respectively.

P (3, –2) is midpoint of AB. Find the coordinates of A & B, slope of AB & its equation.

Discussion

3867.	How does isotope contradict Dalton theory?
Answer» How does isotope contradict Dalton theory?

Discussion

3868.	Why is valency always a whole number?
Answer» Why is valency always a whole number?

Discussion

3869.	Nuclear fusion reactions happens spontaneously in _____.
Answer» Nuclear fusion reactions happens spontaneously in _____.

Discussion

3870.	Question 1State three differences between physical and chemical changes.
Answer» Question 1 State three differences between physical and chemical changes.

Discussion

3871.	the hardness of water is caused by;a. all of the above b. Mg(HCo3)2c. CaCl2d. CaSo4
Answer» the hardness of water is caused by; a. all of the above b. Mg(HCo3)2 c. CaCl2 d. CaSo4

Discussion

3872.	In which reaction s†an dard entropy of reaction is =+ve? N2+3H2=2NH3 C+O2=CO2 2FeSO4 when heated =Fe2O3+SO2+SO3 2Mg+O2=2MgO
Answer» In which reaction s†an dard entropy of reaction is =+ve? N2+3H2=2NH3 C+O2=CO2 2FeSO4 when heated =Fe2O3+SO2+SO3 2Mg+O2=2MgO

Discussion

3873.	s block elements names
Answer» s block elements names

Discussion

3874.	What is the specific heat capacity of water?
Answer» What is the specific heat capacity of water?

Discussion

3875.	Which of the following are the non-useful components of garbage?
Answer» Which of the following are the non-useful components of garbage?

Discussion

3876.	54.How to find the hybridisation of N atom in NO2 ??
Answer» 54.How to find the hybridisation of N atom in NO2 ??

Discussion

3877.	What happens when we bring an inflated balloon near a lighted bulb ? is? it a physical or chemical change
Answer» What happens when we bring an inflated balloon near a lighted bulb ? is? it a physical or chemical change

Discussion

3878.	Which of the following steps are involved in the processing of wool?
Answer» Which of the following steps are involved in the processing of wool?

Discussion

3879.	Question 24If in the previous figure, iron nail is replaced by a wooden stick, will the bulb glow or not? Justify your answer.
Answer» Question 24 If in the previous figure, iron nail is replaced by a wooden stick, will the bulb glow or not? Justify your answer.

Discussion

3880.	One litre of CO2 is passed through Red Hot Coke. The volume becomes 1.4 litres at same temperature and pressure. The composition of its products is 1) 0.8 of CO2 and 0.6 litre of CO 2) 0.7 litre of CO2 and 0.7 litre of CO 3) 0.6 Litre of CO2 and 0.8 litre of CO 4) 0.4 litre of CO2 and 1.0 litre of CO
Answer» One litre of CO2 is passed through Red Hot Coke. The volume becomes 1.4 litres at same temperature and pressure. The composition of its products is 1) 0.8 of CO2 and 0.6 litre of CO 2) 0.7 litre of CO2 and 0.7 litre of CO 3) 0.6 Litre of CO2 and 0.8 litre of CO 4) 0.4 litre of CO2 and 1.0 litre of CO

Discussion

3881.	Volatile and non-volatile components of a solid-solid mixture can be separated by ____________.
Answer» Volatile and non-volatile components of a solid-solid mixture can be separated by ____________.

Discussion

3882.	Name the property of iron metal due to which it can be hammered to make objects of different shapes such as an axe,a spade or shovel.
Answer» Name the property of iron metal due to which it can be hammered to make objects of different shapes such as an axe,a spade or shovel.

Discussion

3883.	What is loading?
Answer» What is loading?

Discussion

3884.	The reason why balloons are filled with helium instead of hydrogen is:-
Answer» The reason why balloons are filled with helium instead of hydrogen is:-

Discussion

3885.	'उसके पिता एक सुंदर-सा खिलौना बनाने में लगे हैं।'इस वाक्य में 'सुंदर-सा' लगाकर वाक्य बनाया गया है। तुम भी साधारण, बड़ा, छोटा, लंबा, गोल, चौकोर और त्रिकोण शब्द में सा, से या सी का प्रयोग कर वाक्य बनाओ।
Answer» 'उसके पिता एक सुंदर-सा खिलौना बनाने में लगे हैं।'इस वाक्य में 'सुंदर-सा' लगाकर वाक्य बनाया गया है। तुम भी साधारण, बड़ा, छोटा, लंबा, गोल, चौकोर और त्रिकोण शब्द में सा, से या सी का प्रयोग कर वाक्य बनाओ।

Discussion

3886.	Why nylon is used for making parachutes and ropes for rock climbing?
Answer» Why nylon is used for making parachutes and ropes for rock climbing?

Discussion

3887.	Should the handle and bristles of a toothbrush be made of the same material? Explain your solution.
Answer» Should the handle and bristles of a toothbrush be made of the same material? Explain your solution.

Discussion

3888.	Which of the following is a banned item as per new rules to make Tamilnadu plastic-free?
Answer» Which of the following is a banned item as per new rules to make Tamilnadu plastic-free?

Discussion

3889.	Structure of orthorombic sulphur and hybridization
Answer» Structure of orthorombic sulphur and hybridization

Discussion

3890.	Question 1 (b)Which separation techniques will you apply for the separation of the following? b. Ammonium chloride from a mixture containing sodium chloride and ammonium chloride.
Answer» Question 1 (b) Which separation techniques will you apply for the separation of the following? b. Ammonium chloride from a mixture containing sodium chloride and ammonium chloride.

Discussion

3891.	The cultivation of silkworms to produce silk is known as ______.
Answer» The cultivation of silkworms to produce silk is known as ______.

Discussion

3892.	What is permanent hardness of water?
Answer» What is permanent hardness of water?

Discussion

3893.	(a) What is rayon ? How is rayon made ? (b) Give any two uses of rayon.
Answer» (a) What is rayon ? How is rayon made ? (b) Give any two uses of rayon.

3893.

(a) What is rayon ? How is rayon made ? (b) Give any two uses of rayon.

Answer»

(a) What is rayon ? How is rayon made ?

(b) Give any two uses of rayon.

Discussion

3894.	Question 26Differentiate between biodegradable and non-biodegradable substances. Cite examples.
Answer» Question 26 Differentiate between biodegradable and non-biodegradable substances. Cite examples.

Discussion

3895.	When 0.5 g of sulphur is burnt to SO_2 ; 4.6 kJ of heat is liberated. What is the enthalpy of formation of sulphur dioxide ? (a) -147 kJ (b) +147.2kJ (c) +294.4 kJ(d) -294.4k
Answer» When 0.5 g of sulphur is burnt to SO_2 ; 4.6 kJ of heat is liberated. What is the enthalpy of formation of sulphur dioxide ? (a) -147 kJ (b) +147.2kJ (c) +294.4 kJ(d) -294.4k

Discussion

3896.	The process by which a solid directly converts into its vapour state is called
Answer» The process by which a solid directly converts into its vapour state is called

Discussion

3897.	We do not clean ponds or lakes, but an aquarium needs to be cleaned. Why?
Answer» We do not clean ponds or lakes, but an aquarium needs to be cleaned. Why?

Discussion

3898.	Write a Python program to convert temperature in degree Celsius to degree Fahrenheit. If water boils at 100 degree C and freezes as 0 degree C, use the program to find out what is the boiling point and freezing point of water on the Fahrenheit scale. (Hint: T(°F) = T(°C) × 9/5 + 32)
Answer» Write a Python program to convert temperature in degree Celsius to degree Fahrenheit. If water boils at 100 degree C and freezes as 0 degree C, use the program to find out what is the boiling point and freezing point of water on the Fahrenheit scale. (Hint: T(°F) = T(°C) × 9/5 + 32)

Discussion

3899.	Write any two observations which support the fact that atoms are divisible.
Answer» Write any two observations which support the fact that atoms are divisible.

Discussion

3900.	Change in volume when 10 ml nh3 is completely decomposed into n2 nd h2 is
Answer» Change in volume when 10 ml nh3 is completely decomposed into n2 nd h2 is

Discussion

Explore topic-wise InterviewSolutions in .

What will be the chemical formula for aluminium oxide?

Complete the following reaction Fe2O3+3CΔ→ 2Fe+ _________

What is kinetic energy

Question 32Why petrol is exhaustible natural resource, whereas sunlight is not? Explain.

How transparent things can allow light to pass through them?

What are the three common states of matter? Explain each with suitable example examples.

Which of the following sets comprises of natural fibres only?

What is the latin name of potassium?

When water boils, its molecules start moving faster and many of them escape from water. Is boiling a chemical or a physical change?

Which is the correct answer about the states of substances I, II and III with reference to the following picture?

Question 3 (c)Like synthetic fibres, plastic is also a _________.

Question 27What are the environmental consequences of using fossil fuels? Suggest the steps to minimize the pollution caused by various sources of energy including non-conventional sources of energy.

What is electroplating

Given that saccharin has a molar mass of 183.18 g/mol, how many saccharinmolecules are in a 40.0-mg (0.0400-g) sample of saccharin? How many carbonatoms are in the same sample?

A &amp; B are 2 points on the – axis &amp; y – axis respectively. P (3, –2) is midpoint of AB. Find the coordinates of A &amp; B, slope of AB &amp; its equation.

How does isotope contradict Dalton theory?

Why is valency always a whole number?

Nuclear fusion reactions happens spontaneously in _____.

Question 1State three differences between physical and chemical changes.

the hardness of water is caused by;a. all of the above b. Mg(HCo3)2c. CaCl2d. CaSo4

In which reaction s†an dard entropy of reaction is =+ve? N2+3H2=2NH3 C+O2=CO2 2FeSO4 when heated =Fe2O3+SO2+SO3 2Mg+O2=2MgO

s block elements names

What is the specific heat capacity of water?

Which of the following are the non-useful components of garbage?

54.How to find the hybridisation of N atom in NO2 ??

What happens when we bring an inflated balloon near a lighted bulb ? is? it a physical or chemical change

Which of the following steps are involved in the processing of wool?

Question 24If in the previous figure, iron nail is replaced by a wooden stick, will the bulb glow or not? Justify your answer.

Volatile and non-volatile components of a solid-solid mixture can be separated by ____________.

Name the property of iron metal due to which it can be hammered to make objects of different shapes such as an axe,a spade or shovel.

What is loading?

The reason why balloons are filled with helium instead of hydrogen is:-

Why nylon is used for making parachutes and ropes for rock climbing?

Should the handle and bristles of a toothbrush be made of the same material? Explain your solution.

Which of the following is a banned item as per new rules to make Tamilnadu plastic-free?

Structure of orthorombic sulphur and hybridization

Question 1 (b)Which separation techniques will you apply for the separation of the following? b. Ammonium chloride from a mixture containing sodium chloride and ammonium chloride.

The cultivation of silkworms to produce silk is known as ______.

What is permanent hardness of water?

(a) What is rayon ? How is rayon made ? (b) Give any two uses of rayon.

Question 26Differentiate between biodegradable and non-biodegradable substances. Cite examples.

When 0.5 g of sulphur is burnt to SO_2 ; 4.6 kJ of heat is liberated. What is the enthalpy of formation of sulphur dioxide ? (a) -147 kJ (b) +147.2kJ (c) +294.4 kJ(d) -294.4k

The process by which a solid directly converts into its vapour state is called

We do not clean ponds or lakes, but an aquarium needs to be cleaned. Why?

Write a Python program to convert temperature in degree Celsius to degree Fahrenheit. If water boils at 100 degree C and freezes as 0 degree C, use the program to find out what is the boiling point and freezing point of water on the Fahrenheit scale. (Hint: T(°F) = T(°C) × 9/5 + 32)

Write any two observations which support the fact that atoms are divisible.

Change in volume when 10 ml nh3 is completely decomposed into n2 nd h2 is

A & B are 2 points on the – axis & y – axis respectively. P (3, –2) is midpoint of AB. Find the coordinates of A & B, slope of AB & its equation.