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WorksheetsABVRS SCIENCE GENIUS MINDS
Total questions: 20
Worksheet time: 10mins
The amount of carbon present in the earth crust and in the atmosphere is
0.02% and 0.03%
0.2% and 0.3%
2% and 3%
21% and 78%
Bonds which are formed by the sharing of an electron pair between two atoms are known as
Ionic bond
Metallic bond
Covalent bond
None of the above
the compound of hydrogen and carbon has the formula C2H2 is
Ethelene
Ethyne
Ethene
Ethane
the substance which are capable of adding oxygen to to others these substances are known as
(a)
CH3-CH2OH (concH2SO4) ->_____+H2O complete the chemical reaction
CH2=CH2
CH2=CH
CH=CH
CH2-CH
Esters are most commonly found by the reaction of an ______
Acid And alcohol
Base and alcohol
Acid and base
Salt and water
atomic mass of chlorine 35.5 and Iodine 126.9 what will be the average of these two elements mass and write the name of that element
69.9 Gallium
79.9 bromine
87 strontium
63 copper
Which was the first limitations of mendelian periodic table
not assign at correct position of hydrogen
isotopes
atomic mass do not increase in a regular manner from one element to next
how many elements could be decreases between two elements
The term radius of an atom refers as
(a)
Amoeba reproduce by binary fission , spirogyra reproduce by (a)
in flower transfer of pollen from the stamen to the stigma is called
Pollination
Zygote
Asexual reproduction
Budding
Gonorrhea and syphilis are the infectious caused by
Bacteria
Virus
Fungi
Monerans
many ways have been devised to control pregnancy among the following are
Use of condoms
Drugs like pills
Loops or copper T
All above method
a child who inherits an – chromosomes from her father will be a girl and one who inherits – chromosome from him will be a ---- boy
X and Y
Y and X
Option 1 and 2 correct
None of the above
natural selection theory was suggested by
Charles Darwin
Gregor Mendel
lamarck
Aristotle
name the scientist who conducted the organic molecules arising experiment
(a)
the basic unit of all organisms is
(a)
examples for analogous organs
(a)
uses of concave Mirrors are , shaving
(a)
the splitting of white light into its component colours is called
(a)
