What is Black, when Clean and White, when Dirty?
It is Blackboard or Chalkboard which is Black when clean, and as you write on it with white chalk it becomes dirty in White color.
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Which gas is known as "Fuel of Future" ?
Because of its being pollution free and combustion efficient, Hydrogen gas is called fuel of future. Because of its origin in marshy places, Methane is called as 'Marsh Gas'.
Which of the following is the major impact of vedic Culture on Indian History
The four stages of the Deming Cycle are?
Rearrange the parts of the sentence in correct order.
Warm-blooded
P : animals have an elaborate
Q : maintain constant body temperature
R : physiological control to
'AADHAR' is a programme
Which is not include in the private income arising in a country
Which is the only bird that can fly backwards?