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Science Test - 5
Read Instructions for the test.
Negative marks are -0.33 per wrong answer
Right answer is 1 mark
No time limit but finish in 30 mins
Solution can be found at below chapters:
Test series is based on following chapters.
Science Chapter 7: Mixtures
Science Chapter 6: Elements
Q1:Most abndant element in the universe is
Q2:The mixture of CO and H2 is called
Q3: Which is the most abundant element [up to 47%] on earth.
Q4:Hydrogenation of vegetable oils uses ____ as catalyst gives edible oils.
Q5:This is mixture of hydrochloric and nitric acid in ratio of 3:1 it can dissolve even gold and platinum.
Q6: Anaethesia is made up of
oxygen and nitrous oxide
oxygen and fluoric oxide
carbon dioxide and nitrous oxide
Q7:Amongst the type of decay this is the fastest
A and B
Q8: In alpha decay what is emitted
Q9: In terms of penetrating power this is the highest
Q10: They have same number of neutrons but different number of protons.
Q11: atoms of different elements with same mass number but different atomic number are
Q12:atoms that have same atomic number but different mass numbers.
Q13:Regarding isotopes what is true.
they have same number of protons but different number of neutrons]
their chemical properties are same
their physical properties are different
Q14: electrons were discovered by
J J Thompson
Q15:Which is true
Chadwick discovered neutrons.
protons were discovered by Goldstein.
Q16: salt water and sugar water, tincture alcohol [iodine+alcohol] are
Q17: salt and iron fillings, salt and sulfur are which type of mixtures
Q18: Milk is an example of
Q19:Components of a colloid are separated by
Q20: This is the process of separating of solutes that dissolve in the same solvent.
Q21: Which are the types of colloids
sol, solid sol
Q22: Separation of two miscible liquids that have sufficient difference in their boiling points can be done by
Q23:Colloids can scatter beam of light passing through it this is called
Q24: Solder is an alloy of
copper + zinc
[copper + tin]
[lead + tin]
Q25:fractional distillation is done when difference between boiling points of two liquids is less than
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