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question_answer1)
Which of the following elements is liquid at room temperature?
A)
Argon done
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B)
Copper done
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C)
Mercury done
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D)
Calcium done
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E)
None of these done
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question_answer2)
Which one of the following is not a matter?
A)
Air done
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B)
Water done
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C)
Paper done
clear
D)
Smile done
clear
E)
None of these done
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question_answer3)
Which one of the following statements is not correct about solid?
A)
Solids have fixed shape done
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B)
Solids have fixed volume done
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C)
Solids can flow done
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D)
Solids have high densities done
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E)
None of these done
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question_answer4)
Which one of the following statements is correct?
Statement 1: In solids, molecules are tightly packed. |
Statement 2: Force of attraction between molecules in solids is very weak. |
A)
Statement 1 only done
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B)
Statement 2 only done
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C)
Both statements are correct done
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D)
Both statements are incorrect done
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E)
None of these done
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question_answer5)
Which one of the following is correct about gas?
A)
A gas does not have a fixed shape. done
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B)
A gas does not have fixed volume. done
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C)
A gas can be compressed easily. done
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D)
All the above done
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E)
None of these done
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question_answer6)
In which one of the following states of matter, maximum movement of molecules is noticed?
A)
Solid done
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B)
Liquid done
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C)
Gas done
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D)
All the above done
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E)
None of these done
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question_answer7)
The temperature at which a solid substance melts at atmospheric pressure is called its:
A)
Melting point done
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B)
Boiling point done
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C)
Ignition temperature done
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D)
Latent heat done
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E)
None of these done
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question_answer8)
Which one of the following statements is correct?
Statements 1: Physical state of a substance can be changed by changing its temperature |
Statement 2: Physical state of a substance can be changed by changing pressure |
A)
Statement 1 done
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B)
Statement 2 done
clear
C)
Both statements are correct done
clear
D)
Both statements are incorrect done
clear
E)
None of these done
clear
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question_answer9)
Which one of the following statements is correct?
Statement 1: If temperature of a solid substance is increased, the force of attraction between its molecules will also increase |
Statement 2: If temperature of a solid substance is increased, the force of attraction between its molecules will decrease |
A)
Statement 1 only done
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B)
Statement 2 only done
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C)
Both statements are correct done
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D)
Both statements are incorrect done
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E)
None of these done
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question_answer10)
In which one of the following physical states of a substance force of attraction between molecules is maximum?
A)
Solid done
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B)
Liquid done
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C)
Gas done
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D)
All the above done
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E)
None of these done
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question_answer11)
Which of the following is a mixture?
A)
Water done
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B)
Methane done
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C)
Mercury done
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D)
Solution of sugar and water done
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E)
None of these done
clear
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question_answer12)
Which of the following materials falls in the category of pure substances?
A)
Air done
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B)
Mercury done
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C)
Muddy water done
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D)
Milk done
clear
E)
None of these done
clear
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question_answer13)
Which of the following is an example of metalloid?
A)
Coal done
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B)
Coke done
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C)
Copper done
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D)
Boron done
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E)
None of these done
clear
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question_answer14)
Which of the following statements is incorrect for metal?
A)
They are poor conductors of electricity. done
clear
B)
They are ductile. done
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C)
They are malleable. done
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D)
All the above done
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E)
None of these done
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question_answer15)
Which of the following elements is a non-metal?
A)
Mercury done
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B)
Potassium done
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C)
Carbon done
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D)
Calcium done
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E)
None of these done
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question_answer16)
Which of the following is an example of suspension?
A)
Solution of sugar and water done
clear
B)
Muddy water done
clear
C)
Milk done
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D)
Crystal of copper sulphate done
clear
E)
None of these done
clear
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question_answer17)
Which one of the following statements is correct?
A)
Non-metals are generally hard. done
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B)
Non-metals have high tensile strength. done
clear
C)
Non-metals have low density. done
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D)
All the above done
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E)
None of these done
clear
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question_answer18)
Which of the following statements is incorrect?
A)
A true solution is homogeneous mixture. done
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B)
Very small particles of the solution can scatter a beam of light. done
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C)
Solute particles of true solution cannot be separated from the mixture by the process of filtration. done
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D)
Particles of true solution cannot be seen with naked eyes. done
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E)
None of these done
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question_answer19)
Which one of the following shows the process of electrophoresis?
A)
True solution done
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B)
Colloid done
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C)
Suspension done
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D)
All the above done
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E)
None of these done
clear
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question_answer20)
Which one of the following is a liquid non-metal?
A)
Gallium done
clear
B)
Bromine done
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C)
Lead done
clear
D)
Hydrogen done
clear
E)
None of these done
clear
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question_answer21)
Which one of the following statements is incorrect?
A)
Increase in surface area, increases the rate of evaporation. done
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B)
Increase in temperature, increases the rate of evaporation. done
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C)
Increase in humidity, increases the rate of evaporation. done
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D)
Increase in wind speed, increases the rate of evaporation. done
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E)
None of these done
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question_answer22)
Vapourisation takes place:
A)
At all temperatures. done
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B)
At melting point of the liquid. done
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C)
At the boiling point of, the liquid. done
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D)
At the freezing point of the liquid. done
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E)
None of these done
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question_answer23)
The process behind disappearing of nephthalene balls with time is known as:
A)
Melting done
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B)
Condensation done
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C)
Sublimation done
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D)
Matter done
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E)
None of these done
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question_answer24)
Why does a book is solid at room temperature?
A)
It has fixed shape. done
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B)
It has fixed volume. done
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C)
It cannot flow. done
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D)
All the above done
clear
E)
None of these done
clear
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question_answer25)
How much of a given substance is mixed with another substances is defined by ____ of a solution.
A)
Temperature done
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B)
Concentration done
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C)
Solvent done
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D)
Humidity done
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E)
None of these done
clear
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question_answer26)
A solution is prepared by dissolving 20 g of NaCl in 200 g of water. Find the concentration of the solution.
A)
11.1% done
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B)
9.01% done
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C)
8% done
clear
D)
10% done
clear
E)
None of these done
clear
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question_answer27)
The solubility of a solute 'X' in water is 35 g in 100 g of water. The density of the solution is \[1.5m{{l}^{-1}}\]The concentration of ?x? in the solution in % (m/v) is:
A)
60% done
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B)
38.88% done
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C)
34% done
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D)
88% done
clear
E)
None of these done
clear
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question_answer28)
A mixture of sand and iodine can be separated by:
A)
Filtration done
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B)
Evaporation done
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C)
Sublimation done
clear
D)
Decantation done
clear
E)
None of these done
clear
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question_answer29)
Which one of the following is a colloid?
A)
Cheese done
clear
B)
Ice cream done
clear
C)
Milk done
clear
D)
All the above done
clear
E)
None of these done
clear
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question_answer30)
Which of the following is heterogeneous in nature?
A)
True solution done
clear
B)
Colloid done
clear
C)
Suspension done
clear
D)
Both [b] and [c] done
clear
E)
None of these done
clear
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question_answer31)
Drugs in blood can be separated by which of the following technique?
A)
Filtration done
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B)
Paper Chromatography done
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C)
Distillation done
clear
D)
Threshing done
clear
E)
None of these done
clear
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question_answer32)
____method is used to separate two miscible liquids.
A)
Fractional distillation done
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B)
Magnetic separation done
clear
C)
Separating funnel done
clear
D)
Threshing done
clear
E)
None of these done
clear
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question_answer33)
Which one of the following substances does not undergo sublimation?
A)
Ammonium chloride done
clear
B)
Iodine done
clear
C)
Dry ice done
clear
D)
Ice done
clear
E)
None of these done
clear
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question_answer34)
In which of the following colloids the dispersion medium is solid?
A)
Whipped Cream done
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B)
Marshmallow done
clear
C)
Paint done
clear
D)
Mayonnaise done
clear
E)
None of these done
clear
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question_answer35)
Which of the following conditions is essential for using fractional distillation as a method for separation of the components from mixture?
(i) The components must differ in their boiling points atleast by\[{{15}^{o}}C\]. |
(ii) The components must have same boiling points. |
(iii) The components must be miscible with each other. |
(iv)The components, must be immiscible with each other. |
A)
(i) and (ii) done
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B)
(ii) and (iii) done
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C)
(i) and (iv) done
clear
D)
(i) and (iii) done
clear
E)
None of these done
clear
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question_answer36)
Which one of the following is an example of aerosol?
A)
Rubber sponge done
clear
B)
Ruby done
clear
C)
Cloud done
clear
D)
Ink done
clear
E)
None of these done
clear
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question_answer37)
Which one of the following will give a true solution when dissolved in water?
A)
Chalk done
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B)
Sand done
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C)
Sugar done
clear
D)
Starch done
clear
E)
None of these done
clear
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question_answer38)
Tincture of iodine refers to:
A)
Iodine dissolved in milk done
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B)
Iodine dissolved in ethanol done
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C)
Iodine dissolved in copper sulphate solution done
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D)
Iodine dissolved in common salt. done
clear
E)
None of these done
clear
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question_answer39)
A mixture of water and benzene can be separated by using:
A)
Filtration methods done
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B)
Separating funnel methods done
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C)
Centrifugation method done
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D)
Chromatography done
clear
E)
None of these done
clear
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question_answer40)
A medical examination which fine precipitates in urine are to be separated. Which of the following separation methods should be used?
A)
Paper chromatography done
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B)
Centrifugation done
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C)
Decantation done
clear
D)
Separating funnel done
clear
E)
None of these done
clear
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