7248 + Interview Questions in Chemistry Page 15 InterviewSolution

701.	The alkali formed by the reaction of sodium with water is ____________.
Answer» The alkali formed by the reaction of sodium with water is ____________.

Discussion

702.	Harmful effects of fuel Paragraph writing
Answer» Harmful effects of fuel Paragraph writing

Discussion

703.	Glass is made up of
Answer» Glass is made up of

Discussion

704.	What is the use of fFormica plastic in nature?
Answer» What is the use of fFormica plastic in nature?

Discussion

705.	Arrange water, sugar, oxygen in increasing order of forces of attraction between the particles and explain the same.
Answer» Arrange water, sugar, oxygen in increasing order of forces of attraction between the particles and explain the same.

Discussion

706.	Calculate the molecular masses of H2,O2,CO2,NH3.
Answer» Calculate the molecular masses of $H_{2}, O_{2}, {CO}_{2}, {NH}_{3} .$

Discussion

707.	Identify the odd term out and explain. A.gold,silver, copper,brass. B.Hydrogen, hydrogen peroxide, carbon dioxide, water vapour. C.milk, lemon juice, carbon, steel. D.water, Mercury, bromine, petrol. E.sugar, salt, baking soda, blue vitriol. F.hydrogen, sodium, potassium, carbon.
Answer» Identify the odd term out and explain. A.gold,silver, copper,brass. B.Hydrogen, hydrogen peroxide, carbon dioxide, water vapour. C.milk, lemon juice, carbon, steel. D.water, Mercury, bromine, petrol. E.sugar, salt, baking soda, blue vitriol. F.hydrogen, sodium, potassium, carbon.

707.

Identify the odd term out and explain. A.gold,silver, copper,brass. B.Hydrogen, hydrogen peroxide, carbon dioxide, water vapour. C.milk, lemon juice, carbon, steel. D.water, Mercury, bromine, petrol. E.sugar, salt, baking soda, blue vitriol. F.hydrogen, sodium, potassium, carbon.

Answer»

Identify the odd term out and explain.

A.gold,silver, copper,brass.

B.Hydrogen, hydrogen peroxide, carbon dioxide, water vapour.

C.milk, lemon juice, carbon, steel.

D.water, Mercury, bromine, petrol.

E.sugar, salt, baking soda, blue vitriol.

F.hydrogen, sodium, potassium, carbon.

Discussion

708.	Which of the following has zero s†an dard molar enthalpy of formation at 298K ? 1: Br2(g) 2:Cl2(g) 3H2O(g) 4: C2H6(g)
Answer» Which of the following has zero s†an dard molar enthalpy of formation at 298K ? 1: Br2(g) 2:Cl2(g) 3H2O(g) 4: C2H6(g)

Discussion

709.	Polythene and PVC are examples of
Answer» Polythene and PVC are examples of

Discussion

710.	Question 13Name two soft metals which can be cut with a knife.
Answer» Question 13 Name two soft metals which can be cut with a knife.

Discussion

711.	Why do renewable sources of energy not cause pollution?
Answer» Why do renewable sources of energy not cause pollution?

Discussion

712.	Which of the following options is correct with respect to atomicity?
Answer» Which of the following options is correct with respect to atomicity?

Discussion

713.	Fill in the following blanks with suitable words : (a) Synthetic fibres are also called .......... or ....... fibres. (b) Synthetic fibres are made from raw materials called ....... (c) Like synthetic fibres, plastic is also a ........ (d) The use of plastics can be reduced by using bags made of ........ or ......... instead of polythene bags.
Answer» Fill in the following blanks with suitable words : (a) Synthetic fibres are also called .......... or ....... fibres. (b) Synthetic fibres are made from raw materials called ....... (c) Like synthetic fibres, plastic is also a ........ (d) The use of plastics can be reduced by using bags made of ........ or ......... instead of polythene bags.

713.

Fill in the following blanks with suitable words : (a) Synthetic fibres are also called .......... or ....... fibres. (b) Synthetic fibres are made from raw materials called ....... (c) Like synthetic fibres, plastic is also a ........ (d) The use of plastics can be reduced by using bags made of ........ or ......... instead of polythene bags.

Answer»

Fill in the following blanks with suitable words :

(a) Synthetic fibres are also called .......... or ....... fibres.

(b) Synthetic fibres are made from raw materials called .......

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

(d) The use of plastics can be reduced by using bags made of ........ or ......... instead of polythene bags.

Discussion

714.	Explain why, fire caused by electricity should not be extinguished by pouring water.
Answer» Explain why, fire caused by electricity should not be extinguished by pouring water.

Discussion

715.	Who invented the plastic? There has been so much trouble nowadays because of that inventor.who is he
Answer» Who invented the plastic? There has been so much trouble nowadays because of that inventor.who is he

Discussion

716.	The atomic number of the element calcium is 20. The total number of electrons in calcium is ___
Answer» The atomic number of the element calcium is 20. The total number of electrons in calcium is ___

Discussion

717.	12. According to the reactivity series of metals copper is less reactive than hydrogen. Then why is Copper hydroxide formed during corrosion of copper which is not possible by the reactivity series of metals)?
Answer» 12. According to the reactivity series of metals copper is less reactive than hydrogen. Then why is Copper hydroxide formed during corrosion of copper which is not possible by the reactivity series of metals)?

Discussion

718.	ClO3 hybridisation, structure, shape and geometry
Answer» ClO3 hybridisation, structure, shape and geometry

Discussion

719.	how to know which is solute and solvent?
Answer» how to know which is solute and solvent?

Discussion

720.	Write the uses of acrylic fibres.
Answer» Write the uses of acrylic fibres.

Discussion

721.	The concept of EQUIVALENT MASS is unclear to me.
Answer» The concept of EQUIVALENT MASS is unclear to me.

Discussion

722.	in reversible processes the infinitely driving force is greater than the stopping force. so how come the process is reversed?
Answer» in reversible processes the infinitely driving force is greater than the stopping force. so how come the process is reversed?

Discussion

723.	Which of the following type of forces are present in Nylon 6-6??
Answer» Which of the following type of forces are present in Nylon 6-6??

Discussion

724.	Temperature dependent is______?1)Molarity; 2)molality; 3)normality
Answer» Temperature dependent is______? 1)Molarity; 2)molality; 3)normality

Discussion

725.	During the process of eating we masticate and mix saliva into the food as well. Masticating and salivating are ______&______ processes.
Answer» During the process of eating we masticate and mix saliva into the food as well. Masticating and salivating are ______&______ processes.

Discussion

726.	1kg of ice at mixed with 4.4kg of water at 30^° C.The final temperature of mixture is(specific heat of ice=2100j/kg-k)1)2.3^° c 2)4.4^° C 3)5.3^° C 4)8.7^°
Answer» 1kg of ice at mixed with 4.4kg of water at 30^° C.The final temperature of mixture is(specific heat of ice=2100j/kg-k)1)2.3^° c 2)4.4^° C 3)5.3^° C 4)8.7^°

Discussion

727.	To find mass of a carbon atom,why mass of electron is neglected?
Answer» To find mass of a carbon atom,why mass of electron is neglected?

Discussion

728.	Fill in the blanks.(a) Burning of wood and coal causes ______ of air. (b) A liquid fuel, used in homes is ______.(c) Fuel must be heated to its ______ ______ before it starts burning.(d) Fire produced by oil cannot be controlled by ______.
Answer» Fill in the blanks. (a) Burning of wood and coal causes ______ of air. (b) A liquid fuel, used in homes is ______. (c) Fuel must be heated to its ______ ______ before it starts burning. (d) Fire produced by oil cannot be controlled by ______.

Discussion

729.	What is the atomic number, mass number and charge of neutrino, antineutrino and positron particles?
Answer» What is the atomic number, mass number and charge of neutrino, antineutrino and positron particles?

Discussion

730.	From the given three equations, which metal will be the most reactive out of the given metals? Zn + PbSO4 →ZnSO4 + Pb Fe + CuSO4 →FeSO4 + Cu Fe + ZnSO4 →FeSO4 + Zn
Answer» From the given three equations, which metal will be the most reactive out of the given metals? Zn + PbSO₄ →ZnSO₄ + Pb Fe + CuSO₄ →FeSO₄ + Cu Fe + ZnSO₄ →FeSO₄ + Zn

Discussion

731.	Question 3If you could use any source of energy for heating your food, which one would you use and why?
Answer» Question 3 If you could use any source of energy for heating your food, which one would you use and why?

Discussion

732.	Question 13Which among the following is considered as the cleanest fuel?(a) Cow dung cake(b) Petrol(c) Kerosene(d) Hydrogen gas
Answer» Question 13 Which among the following is considered as the cleanest fuel? (a) Cow dung cake (b) Petrol (c) Kerosene (d) Hydrogen gas

Discussion

733.	If we consider bond strenght of pi bond as follows -- 2p pi - 2p pi > 2p pi - 3p pi Why does bond strength of pi bond decrease as dis†an ce increases from the nucleus ?
Answer» If we consider bond strenght of pi bond as follows -- 2p pi - 2p pi > 2p pi - 3p pi Why does bond strength of pi bond decrease as dis†an ce increases from the nucleus ?

Discussion

734.	In which of the following molecules the central atom does not have sp3 hybridization?a) CH4b) SF4c) BF4-d) NH4+
Answer» In which of the following molecules the central atom does not have sp3 hybridization? a) CH4 b) SF4 c) BF4- d) NH4+

Discussion

735.	Based on the activity series, which of the following can be extracted by electrolysis?
Answer» Based on the activity series, which of the following can be extracted by electrolysis?

Discussion

736.	The ratio of oxygen in FeO and Fe2O3(containing equal amount of iron)
Answer» The ratio of oxygen in FeO and Fe2O3(containing equal amount of iron)

Discussion

737.	Question 3The number of electrons in an element X is 15 and the number of neutrons is 16. Which of the following is the correct representation of the element?(a) 3115X(b) 3116X(c) 1615X(d) 1516X
Answer» Question 3 The number of electrons in an element X is 15 and the number of neutrons is 16. Which of the following is the correct representation of the element? (a) $_{15}^{31} X$ (b) $_{16}^{31} X$ (c) $_{15}^{16} X$ (d) $_{16}^{15} X$

Discussion

738.	Which of the following uses fractional distillation?
Answer» Which of the following uses fractional distillation?

Discussion

739.	Why is the valency of Iron sometimes 2 and sometimes 3? And which value of its valency should we consider while writing a formula?
Answer» Why is the valency of Iron sometimes 2 and sometimes 3? And which value of its valency should we consider while writing a formula?

Discussion

740.	Question 16Which non-metal is used to disinfect water?
Answer» Question 16 Which non-metal is used to disinfect water?

Discussion

741.	55. What do u mean by redox?
Answer» 55. What do u mean by redox?

Discussion

742.	How would you prove that blue copper sulphate crystals contain water of crystallisation ?
Answer» How would you prove that blue copper sulphate crystals contain water of crystallisation ?

Discussion

743.	Fill in the blanks with the exact feeling word.(i) The tourists were ___________ to see the beautiful Taj Mahal. (amazed, shocked, worried)(ii) The lights went out suddenly. I was alone and _____________. (worried, shocked, frightened)(iii) He has been ill for a long time and his parents were __________. (unhappy, worried, angry)(iv) The shopkeeper was ____________when he saw his safe wide open with all his money missing. (unhappy, shocked, angry)
Answer» Fill in the blanks with the exact feeling word. (i) The tourists were ___________ to see the beautiful Taj Mahal. (amazed, shocked, worried) (ii) The lights went out suddenly. I was alone and _____________. (worried, shocked, frightened) (iii) He has been ill for a long time and his parents were __________. (unhappy, worried, angry) (iv) The shopkeeper was ____________when he saw his safe wide open with all his money missing. (unhappy, shocked, angry)

743.

Fill in the blanks with the exact feeling word.(i) The tourists were _____ to see the beautiful Taj Mahal. (amazed, shocked, worried)(ii) The lights went out suddenly. I was alone and _. (worried, shocked, frightened)(iii) He has been ill for a long time and his parents were . (unhappy, worried, angry)(iv) The shopkeeper was ________when he saw his safe wide open with all his money missing. (unhappy, shocked, angry)

Answer» Fill in the blanks with the exact feeling word.

(i) The tourists were ___________ to see the beautiful Taj Mahal. (amazed, shocked, worried)

(ii) The lights went out suddenly. I was alone and _____________. (worried, shocked, frightened)

(iii) He has been ill for a long time and his parents were __________. (unhappy, worried, angry)

(iv) The shopkeeper was ____________when he saw his safe wide open with all his money missing. (unhappy, shocked, angry)

Discussion

744.	Why do you use synthetic fiber over natural fiber
Answer» Why do you use synthetic fiber over natural fiber

Discussion

745.	What is incomplete combustion? What are it's by-product?
Answer» What is incomplete combustion? What are it's by-product?

Discussion

746.	Number the points.
Answer» Number the points.

Discussion

747.	Which of the following particles were used in Rutherford’s gold foil experiment?
Answer» Which of the following particles were used in Rutherford’s gold foil experiment?

Discussion

748.	(a) What is the action of red litmus on (i) Dry ammonia gas (ii) solution of ammonia gas in water (b) State the observations you would make on adding ammonium hydroxide to aqueous solution of (i) Ferrous sulphate (ii) Aluminium chloride. [3 MARKS]
Answer» (a) What is the action of red litmus on (i) Dry ammonia gas (ii) solution of ammonia gas in water (b) State the observations you would make on adding ammonium hydroxide to aqueous solution of (i) Ferrous sulphate (ii) Aluminium chloride. [3 MARKS]

Discussion

749.	The specific gravity of ice is 0.9. The area of smallest slabe of ice of height 0.5 m, floating in fresh water that will support 100 kg man is :-
Answer» The specific gravity of ice is 0.9. The area of smallest slabe of ice of height 0.5 m, floating in fresh water that will support 100 kg man is :-

Discussion

750.	Which gas is produced when dilute hydrochloric acid is added to a reactive metal? Write the chemical reaction when iron reacts with dilute H2SO4.
Answer» Which gas is produced when dilute hydrochloric acid is added to a reactive metal? Write the chemical reaction when iron reacts with dilute $H_{2} S O_{4} .$

Discussion

Explore topic-wise InterviewSolutions in .

The alkali formed by the reaction of sodium with water is ____________.

Harmful effects of fuel Paragraph writing

Glass is made up of

What is the use of fFormica plastic in nature?

Arrange water, sugar, oxygen in increasing order of forces of attraction between the particles and explain the same.

Calculate the molecular masses of H2,O2,CO2,NH3.

Identify the odd term out and explain. A.gold,silver, copper,brass. B.Hydrogen, hydrogen peroxide, carbon dioxide, water vapour. C.milk, lemon juice, carbon, steel. D.water, Mercury, bromine, petrol. E.sugar, salt, baking soda, blue vitriol. F.hydrogen, sodium, potassium, carbon.

Which of the following has zero s†an dard molar enthalpy of formation at 298K ? 1: Br2(g) 2:Cl2(g) 3H2O(g) 4: C2H6(g)

Polythene and PVC are examples of

Question 13Name two soft metals which can be cut with a knife.

Why do renewable sources of energy not cause pollution?

Which of the following options is correct with respect to atomicity?

Explain why, fire caused by electricity should not be extinguished by pouring water.

Who invented the plastic? There has been so much trouble nowadays because of that inventor.*who is he*

The atomic number of the element calcium is 20. The total number of electrons in calcium is ___

12. According to the reactivity series of metals copper is less reactive than hydrogen. Then why is Copper hydroxide formed during corrosion of copper which is not possible by the reactivity series of metals)?

ClO3 hybridisation, structure, shape and geometry

how to know which is solute and solvent?

Write the uses of acrylic fibres.

The concept of EQUIVALENT MASS is unclear to me.

in reversible processes the infinitely driving force is greater than the stopping force. so how come the process is reversed?

Which of the following type of forces are present in Nylon 6-6??

Temperature dependent is______?1)Molarity; 2)molality; 3)normality

During the process of eating we masticate and mix saliva into the food as well. Masticating and salivating are ______&amp;______ processes.

1kg of ice at mixed with 4.4kg of water at 30^° C.The final temperature of mixture is(specific heat of ice=2100j/kg-k)1)2.3^° c 2)4.4^° C 3)5.3^° C 4)8.7^°

To find mass of a carbon atom,why mass of electron is neglected?

Fill in the blanks.​(a) Burning of wood and coal causes ______ of air. ​(b) A liquid fuel, used in homes is ______.(c) Fuel must be heated to its ______ ______ before it starts burning.(d) Fire produced by oil cannot be controlled by ______.

What is the atomic number, mass number and charge of neutrino, antineutrino and positron particles?

From the given three equations, which metal will be the most reactive out of the given metals? Zn + PbSO4 →ZnSO4 + Pb Fe + CuSO4 →FeSO4 + Cu Fe + ZnSO4 →FeSO4 + Zn

Question 3If you could use any source of energy for heating your food, which one would you use and why?

Question 13Which among the following is considered as the cleanest fuel?(a) Cow dung cake(b) Petrol(c) Kerosene(d) Hydrogen gas

If we consider bond strenght of pi bond as follows -- 2p pi - 2p pi > 2p pi - 3p pi Why does bond strength of pi bond decrease as dis†an ce increases from the nucleus ?

In which of the following molecules the central atom does not have sp3 hybridization?a) CH4b) SF4c) BF4-d) NH4+

Based on the activity series, which of the following can be extracted by electrolysis?

The ratio of oxygen in FeO and Fe2O3(containing equal amount of iron)

Question 3The number of electrons in an element X is 15 and the number of neutrons is 16. Which of the following is the correct representation of the element?(a) 3115X(b) 3116X(c) 1615X(d) 1516X

Which of the following uses fractional distillation?

Why is the valency of Iron sometimes 2 and sometimes 3? And which value of its valency should we consider while writing a formula?

Question 16Which non-metal is used to disinfect water?

55. What do u mean by redox?

How would you prove that blue copper sulphate crystals contain water of crystallisation ?

Why do you use synthetic fiber over natural fiber

What is incomplete combustion? What are it's by-product?

Number the points.

Which of the following particles were used in Rutherford’s gold foil experiment?

(a) What is the action of red litmus on (i) Dry ammonia gas (ii) solution of ammonia gas in water (b) State the observations you would make on adding ammonium hydroxide to aqueous solution of (i) Ferrous sulphate (ii) Aluminium chloride. [3 MARKS]

The specific gravity of ice is 0.9. The area of smallest slabe of ice of height 0.5 m, floating in fresh water that will support 100 kg man is :-

Which gas is produced when dilute hydrochloric acid is added to a reactive metal? Write the chemical reaction when iron reacts with dilute H2SO4.

Who invented the plastic? There has been so much trouble nowadays because of that inventor.who is he

During the process of eating we masticate and mix saliva into the food as well. Masticating and salivating are & processes.

Fill in the blanks.(a) Burning of wood and coal causes of air. (b) A liquid fuel, used in homes is .(c) Fuel must be heated to its before it starts burning.(d) Fire produced by oil cannot be controlled by __.