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question_answer1)
Which is not a unit of measuring temperature?
A)
Kelvin done
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B)
Celsius done
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C)
Pascal done
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D)
Fahrenheit done
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E)
None of these done
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question_answer2)
If freezing point of ice is \[32{}^\circ \] F then find the freezing point of ice in Kelvin?
A)
\[0\,\,K\] done
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B)
\[273.15\,\,K\] done
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C)
\[272\,\,K\] done
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D)
\[373\,\,K\] done
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E)
None of these done
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question_answer3)
Two friends Raman and Raghu measured the body temperature of Yashika. According to Raman it was \[{{39}^{o}}C\] and according to Raghu it was\[{{102.2}^{o}}F\]. If the body temperature of Yashika on Kelvin scale is \[312.15\] then who is correct among the following?
A)
Raghu says Yashika has fever with \[39{}^\circ C.\] done
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B)
Raman says Yashika has fever with \[102.2{}^\circ F\] done
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C)
Both Raman and Raghu are correct. done
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D)
Either Raman or Raghu is correct. done
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E)
None of these done
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question_answer4)
Boiling point of water is:
A)
273 K done
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B)
373 K done
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C)
112 K done
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D)
100 K done
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E)
None of these done
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question_answer5)
Temperature of a boiling solution in the kitchen can be measured by using:
A)
Clinical thermometer done
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B)
Barometer done
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C)
Lab Thermometer done
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D)
Speedometer done
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E)
None of these done
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question_answer6)
Rising of mercury in the thermometer is due to:
A)
Contraction of mercury on heating. done
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B)
Expansion of mercury on heating. done
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C)
Movement of the patient. done
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D)
Glass Covering of thermometer. done
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E)
None of these done
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question_answer7)
In the Process of convection:
A)
Transfer of molecules do not occur. done
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B)
Transfer of molecules occur. done
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C)
No medium is required. done
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D)
Transfer of free electrons occur. done
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E)
None of these done
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question_answer8)
Kink in a clinical thermometer:
A)
Do not play any role. done
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B)
Expands the mercury. done
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C)
Prevents the mercury from flowing back into the bulb just after measuring temperature. done
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D)
Is the main unit of measuring temperature. done
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E)
None of these done
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question_answer9)
Which one of the following is essential for rusting of iron?
A)
Oxygen done
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B)
Water vapour done
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C)
Iron done
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D)
All the above done
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E)
None of these done
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question_answer10)
\[405{}^\circ \]Celsius is equal to ___ Fahrenheit.
A)
\[273{}^\circ \] done
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B)
\[761{}^\circ \] done
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C)
\[760{}^\circ \] done
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D)
\[972{}^\circ \] done
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E)
None of these done
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question_answer11)
Match the following:
Column A | Column B |
(i) | Solids | [A] | Doctor?s thermometer |
(ii) | Gases | [B] | Radiation |
(iii) | Vacuum | [C] | Conduction |
(iv) | Kink | [D] | Convection |
A)
(i - C), (ii - D), (iii - B), (iv - A) done
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B)
(i - C), (ii - B), (iii - D), (iv - A) done
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C)
(i - C), (ii - A), (iii - D), (iv - B) done
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D)
(i - D), (ii - C), (iii - B), (iv - A) done
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E)
None of these done
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question_answer12)
Ice is covered with a jute cloth to slow the process of melting because:
A)
It is harsh to touch. done
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B)
It is a poor conductor of heat. done
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C)
Ice can be wrapped in it easily. done
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D)
Ice becomes light when covered with jute. done
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E)
None of these done
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question_answer13)
A way of transferring heat from hot body to cold body which do not require any material medium is:
A)
Convection done
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B)
Conduction done
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C)
Radiation done
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D)
Reflection done
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E)
None of these done
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question_answer14)
Molecules of matter on heating:
A)
Move slower done
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B)
Stand still done
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C)
Move faster done
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D)
Always get broken done
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E)
None of these done
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question_answer15)
Some utensils of stainless steel are provided with copper bottoms because:
A)
Copper is easy to clean. done
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B)
It looks good. done
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C)
Copper is a better conductor of heat than stainless steel. done
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D)
All the above done
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E)
None of these done
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question_answer16)
Convert \[-150{}^\circ \] Celsius to Kelvin.
A)
123 K done
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B)
273 K done
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C)
274 K done
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D)
373 K done
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E)
None of these done
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question_answer17)
Higher kinetic energy of the molecules of the body is observed when the body is at __.
A)
Lower temperature done
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B)
Higher temperature done
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C)
Very low temperature done
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D)
All the above done
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E)
None of these done
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question_answer18)
One litre of water at \[25{}^\circ C\] is mixed with one litre of water at \[35{}^\circ C.\] The temperature of the mixture will be:
A)
\[60{}^\circ C\] done
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B)
\[50{}^\circ C\] done
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C)
Between \[25{}^\circ C\] and \[35{}^\circ C\] done
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D)
More than \[{{35}^{o}}C\] done
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E)
None of these done
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question_answer19)
Method of heat transfer by which heat is transferred from sun to earth is:
A)
Conduction done
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B)
Vaporization done
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C)
Radiation done
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D)
Convection done
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E)
None of these done
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question_answer20)
When a ribbon of magnesium is burnt in the air, magnesium oxide is formed. This is an example of:
A)
Physical change done
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B)
Chemical change done
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C)
Temporary change done
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D)
All the above done
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E)
None of these done
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question_answer21)
Original substances participating in a chemical reaction are __ and the new substances formed are known as the ____.
A)
Products, reactants done
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B)
Catalysts, Reactants done
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C)
Reactants, products done
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D)
Products, Catalysts done
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E)
None of these done
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question_answer22)
Gas evolving when acetic acid gets reacted with baking soda.
A)
Hydrogen done
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B)
Carbon dioxide done
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C)
Nitrogen done
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D)
Argon done
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E)
None of these done
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question_answer23)
Burning of candle is a:
A)
Physical Change done
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B)
Chemical Change done
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C)
Both [a] and [b] done
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D)
Biological Change done
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E)
None of these done
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question_answer24)
Name the insoluble product formed when two compounds react in their aqueous solution state.
A)
Reactant done
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B)
Precipitate done
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C)
Catalyst done
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D)
Water done
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E)
None of these done
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question_answer25)
Which of the following is not a Combination reaction?
A)
\[2\,\,Mg+{{O}_{2}}\to 2\,\,MgO\] done
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B)
\[{{N}_{2}}+3{{H}_{2}}\to 2N{{H}_{3}}\] done
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C)
\[Ca{{(OH)}_{2}}\to CaO+{{H}_{2}}O\] done
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D)
\[2{{H}_{2}}+{{O}_{2}}\to 2{{H}_{2}}O\] done
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E)
None of these done
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question_answer26)
___ is known as blue vitriol.
A)
Potassium sulphate done
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B)
Iron sulphate done
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C)
Crystals of copper sulphate done
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D)
Copper hydroxide done
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E)
None of these done
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question_answer27)
Look at the following reaction and choose the correct statement. \[Ca{{(OH)}_{2}}+C{{O}_{2}}\to CaC{{O}_{3}}+{{H}_{2}}O\]
A)
\[C{{O}_{2}}\]Turns lime water milky. done
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B)
White coloured insoluble calcium carbonate is formed. done
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C)
It is a physical change. done
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D)
Both [a] and [b] done
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E)
None of these done
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question_answer28)
______ is not a physical property of a substance.
A)
Colour done
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B)
Shape done
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C)
State done
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D)
Flammability done
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E)
None of these done
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question_answer29)
Process by which salt is obtained by the evaporation of sea water.
A)
Sublimation done
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B)
Condensation done
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C)
Galvanisation done
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D)
Crystallisation done
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E)
None of these done
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question_answer30)
\[NaHC{{O}_{3}}\]is:
A)
Washing soda done
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B)
Baking soda done
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C)
Alum done
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D)
Rust done
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E)
None of these done
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question_answer31)
Sagging of electric wires in summers is because of:
A)
Contraction of metals on heating. done
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B)
Expansion of metals on heating. done
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C)
Metals remain same on heating. done
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D)
Metals change their colour on heating. done
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E)
None of these done
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question_answer32)
Which coloured light is produced when magnesium ribbon bums?
A)
Yellow light done
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B)
Red bright light done
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C)
Brilliant white light done
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D)
Black light done
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E)
None of these done
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question_answer33)
____ is produced when anaerobic bacteria digest animal waste.
A)
Hydrogen gas done
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B)
Biogas done
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C)
Nitrogen gas done
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D)
Sulphur dioxide gas done
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E)
None of these done
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question_answer34)
Washing soda is:
A)
Calcium carbonate done
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B)
Calcium sulphate done
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C)
Sodium carbonate done
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D)
Sodium hydrogen carbonate done
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E)
None of these done
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question_answer35)
A chemical reaction showing single displacement reaction is:
A)
\[NaCl+AgN{{O}_{3}}\to AgCl+NaN{{O}_{3}}\] done
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B)
\[{{H}_{2}}S{{O}_{4}}+2NaOH\to N{{a}_{2}}S{{O}_{4}}+2{{H}_{2}}O\] done
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C)
\[AgN{{O}_{3}}+Cu\to Cu{{(N{{O}_{3}})}_{2}}+2Ag\] done
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D)
All the above done
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E)
None of these done
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question_answer36)
Rate of rusting of iron will be more in:
A)
Deserts done
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B)
Coastal areas done
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C)
Polar regions done
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D)
All the above done
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E)
None of these done
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question_answer37)
Malleability is a property by which:
A)
Metals can be burnt. done
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B)
Metals can be stretched into wires. done
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C)
Metal can be converted into thin sheets. done
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D)
All the above done
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E)
None of these done
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question_answer38)
Effervescence is:
A)
Burning of paper done
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B)
Melting of ice done
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C)
Bubbling in liquid done
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D)
Freezing of water done
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E)
None of these done
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question_answer39)
Which of the following chemical reactions is endothermic?
A)
\[{{N}_{2}}+{{O}_{2}}\to 2NO\] done
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B)
\[C+2S\to C{{S}_{2}}\] done
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C)
\[C+{{O}_{2}}\to C{{O}_{2}}\] done
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D)
Both [a] and [b] done
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E)
None of these done
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question_answer40)
Reducing agent is that which:
A)
Can oxidizes other substances. done
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B)
Can reduce other substances by removing oxygen. done
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C)
Can oxidizes other substances by removing hydrogen. done
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D)
Can oxidizes other substances by providing oxygen to them. done
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E)
None of these done
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