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What are comets?
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‘Saponification involves the hydrolysis of fats and oils by 1 Water 2 Washing soda 3 Stearic acid 4 Caustic soda
Long distance photography is facilitated by 1 Visible light 2 X-rays 3 Infrared rays 4 Ultraviolet rays
The metal that is present in photo films is 1 Mercury 2 Platimnum 3 Magnesium 4 Silver
what are advantages & disadvantages of science?
When and where was the first experimental atomic explosion took place?
How many naval staffs can occupy arihant?
methane is not present in
Atom bomb is based on the principle of 1 Nuclear fusion 2 Nuclear fission 3 Both (a) & (b) 4 None of these
4 Answers ECAT, Group 4 iv, Qnet, UPSC,
Reaction of alcohol, with a carboxylic acid is known as 1 Substitution Reaction 2 Addition reaction 3 Esterification 4 Hydrogenation
what is center of gravity?
Which of the following metals can displace hydrogen from dilute acids? 1 Zinc 2 Gold 3 Copper 4 Silver
Which of the following acids is used for ‘etching glass’? 1 HBrO3 2 H2F2 3 HCIO4 4 HIO4
Biological Sciences 
