Which of the following is the lightest gas?
1 Nitrogen
2 Hydrogen
3 Ammonia
4 Carbon dioxide
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which among the followings is found chlorophyll ?
Mesons are found in 1 ?-rays 2 Laser beam 3 X-rays 4 Cosmic rays
3 Answers ABC, Indian Army, JSSC,
The metallic constituents of hard water are 1 Magnesium, calcium and tin 2 Iron, tin and calcium 3 Calcium, ,magnesium and iron 4 None of these
What are pulsars?
The age of most ancient geological formations is estimated by 1 Potassium-argon method 2 Ra-Si method 3 C14method 4 Uranium-lead method
Which isotope of Uranium is capable of sustaining chain reaction ?
What is the cytology ?
Who is the oldest cosmonaut?
What is used in arihant’s atomic reactor?
The process by which an organic compound breaks down into simpler compounds on heating to high temperature is known as 1 Armatisation 2 Polymerization 3 Pyrolysis 4 Reduction
Which of the following materials are used for preparing blur-black ink? 1 Gallic acid 2 Tannic acid 3 Ferrous sulphate 4 All of these
iS ELEMENT IRON RADIOACTIVE AND WHY?