In which year, atmospheric observations using balloons started?
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Isotopes are separated by 1 Filtration 2 Sublimation 3 Distillation 4 Crystallization
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What is one light minute?
The ratio of pure gold in 18 carat gold is 1 60% 2 75% 3 80% 4 100%
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what is the smallest fish?
The vast resources of unutilized natural gas can be used in the production of 1 Graphite 2 Fertilizers 3 Synthetic petroleum 4 Carbide
What would happen had there been no chlorophyll in the green leaves?
The material used for bleaching paper pulp is 1 Chlorine 2 Caustic soda 3 Sodium hypochlorite 4 Lime
What is the Protoplasm ?
Who was the first cosmonaut?
Which radioactive pollutant has recently drawn the attention of the public, due to its occurrence in the building material? 1 Radium 2 Radon 3 Thorium 4 Plutonium
Which of the following is used as a moderation in nuclear reactor? 1 Ordinary water 2 Radium 3 Thorium 4 Graphite
What is the colouring matter in plants called