WorksheetsPreliminary Round 2-Grade 8
Total questions: 10
Worksheet time: 2mins
Chlorophyll is a naturally occurring chelate compound in which central metal is________________.
sodium
iron
calcium
magnesium
The reason behind decrease in the boiling point of water at higher altitudes is :
high temperature
low temperature
high atmospheric pressure
low atmospheric pressure
Quartz crystals normally used in quartz clocks etc. is chemically
silicon dioxide
germanium dioxide
sodium silicate
a mixture of germanium oxide and silicon dioxide
In an atomic explosion, enormous energy is released which is due to
conversion of mechanical energy into nuclear energy
conversion of mass into energy
conversion of chemical energy into heat energy
conversion of neutrons into protons
Reading of a barometer going down is an indication of
storm
intense heat
rainfall
snow
Which of the following ‘synthetic fibres’ was discovered first?
Polythene
Nylon
Teryline
Rayon
Who among the following Nobel laureates facilitated the development of MRI as an important diagnostic tool ?
Sydney Brenner
Paul C. Lauterbur
John E. Sulton
H. Robert Horvitz
Which India-born scientist was awarded the Nobel Prize in Astrophysics?
Satyendra Nath Bose
Vikram Sarabhai
Sir. C.V. Raman
Prof. Chandrashekhar
Which of the following lady won Nobel Prize in two fields Physics as well as Chemistry?
Marie Curie
Maria Goeppert Mayer
Herta Müller
Elizabeth H. Blackburn
Which of the following are the ingredients of gun metal?
Iron, Zinc, Titanium
Iron, Brass, Tin
Iron, tin
Copper, Tin
