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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
oxygen
hydrogen
plutonium
dihydrogen
Q2:The mixture of CO and H2 is called
hydrogen gas
tear gas
water gas
dry ice
Q3: Which is the most abundant element [up to 47%] on earth.
carbon
nitrogen
oxygen
argon
Q4:Hydrogenation of vegetable oils uses ____ as catalyst gives edible oils.
iron
potassium
sodium
nickel
Q5:This is mixture of hydrochloric and nitric acid in ratio of 3:1 it can dissolve even gold and platinum.
aqua fina
aqua regia
nitric acid
hydronitric acid
Q6: Anaethesia is made up of
oxygen and nitrous oxide
oxygen and fluoric oxide
carbon dioxide and nitrous oxide
none
Q7:Amongst the type of decay this is the fastest
alpha
beta
gamma
A and B
Q8: In alpha decay what is emitted
helium nucleus
dihydrogen
oxygen ion
ionic rays
Q9: In terms of penetrating power this is the highest
helium nucleus
photons
positrons
none
Q10: They have same number of neutrons but different number of protons.
isobar
isobar
isonephs
isotones
Q11: atoms of different elements with same mass number but different atomic number are
isotopes
isobar
isohels
isotones
Q12:atoms that have same atomic number but different mass numbers.
isotopes
isobars
isonephs
isohels
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
all
Q14: electrons were discovered by
Rutherford
Bequerel
Marie curie
J J Thompson
Q15:Which is true
Chadwick discovered neutrons.
protons were discovered by Goldstein.
both
none
Q16: salt water and sugar water, tincture alcohol [iodine+alcohol] are
homogenous
heterogenous
suspensions
colloids
Q17: salt and iron fillings, salt and sulfur are which type of mixtures
homogenous
heterogenous
suspensions
colloids
Q18: Milk is an example of
colloid
suspension
homogenous mixture
heterogenous mixture
Q19:Components of a colloid are separated by
distillation
dispersion
osmosis
centrifugation
Q20: This is the process of separating of solutes that dissolve in the same solvent.
centrifugation
distillation
suspension
chromatography
Q21: Which are the types of colloids
aerosol
sol, solid sol
foam, emulsion
All
Q22: Separation of two miscible liquids that have sufficient difference in their boiling points can be done by
colloidal partition
suspension
distillation
fractional distillation
Q23:Colloids can scatter beam of light passing through it this is called
diffraction
reflection
refraction
tydall effect
Q24: Solder is an alloy of
copper + zinc
[copper + tin]
[lead + tin]
none
Q25:fractional distillation is done when difference between boiling points of two liquids is less than
25K
30K
35K
45K
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