Which combination of colour is the most convenient during day and night time ?
1). Orange and blue
2). White and black
3). Yellow and blue
4). Red and green
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2. Who among the following developed the technology of underground nuclear explosion ?
3. The process involved in making soap is
4. Which of the following circuit elements is used to block DC in an electronic circuit
7. Period of oscillation of 3 cm microwaves in seconds is
8. Which type of reaction produces the most harmful radiation ?
9. Amount of water vapour in the atmosphere is measured in terms of