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For the following questions answer them individually
A concave lens always forms which image ?
real and erect
virtual and erect
real and inverted
virtual and inverted
Which vitamin requires cobalt for its activity?
Vitamin B12
Vitamin D
Vitamin B2
Vitamin A
One of the constituents of tear gas is
Ethane
Ethanol
Ether
Chloropicrin
The modulus of rigidity is the ratio of
longitudinal stress to longitudinal strain
Volume stress to volume strain
shear stress to shear strain
tensile stress to tensile strain
The propagation of sound waves in a gas involves
adiabatic compression and rarefaction
isothermal compression and rarefaction
isochoric compression and rarefaction
isobaric compression and rarefaction
An atomic clock is based on transitions in
Sodium
Caesium
Magnesium
Aluminium
Plasma membrane in eukaryotic cells is made up of which bilayer?
Phospholipid
Lipoprotein
Phospholipo-protein
Phospho-protein
Which one of the following is also called the 'power plants' of the cell ?
Golgi body
Mitochondrion
Ribosome
Lysosome
What is the chemical name of vinegar ?
Citric acid
Acetic acid
Pyruvic acid
Malic acid
Which of the following is not a property of heavy water?
Boiling point of heavy water is lower than that or ordinary water
Density of heavy water is higher than that of ordinary water
Freezing point of heavy water is higher than that of ordinary water
It produces corrosion
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