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
What was the code name given to the first explosion?
any one who has interviewed at noida for SBI clerk i have my interview call on 23.10.2008
Which of the following metals can displace hydrogen from dilute acids? 1 Zinc 2 Gold 3 Copper 4 Silver
Heavy water is 1 Sea water (H2O+Salt) 2 D2O 3 H2O2 4 None of these
Which of the following reactions is used for increasing the number of carbon atoms in a chain? 1 Substitution reaction 2 Wurtz reaction 3 Friedel – Crafts reaction 4 Cannizzaro’s reaction
In fireworks, the green flame is produced because of 1 Mercury 2 Sodium 3 Potassium 4 Barium
What is blood ? Describe its functions in the human body ?
In laundry soaps, a material called ‘filler’ is used. Which of the following is a ‘filler? 1 Talc 2 Sodium silicate 3 Soda ash 4 Sodium phosphate
Which of the following is used as a lubricant? 1 Graphite 2 Silica 3 Diamond 4 Iron oxide
what does the haversian central canal in each osteon contains?
In which of the following processes, is vanadium pent oxide used as a catalyst? 1 Contact process 2 Haber’s process 3 Solvay process 4 None of these
WHAT IS THE FUNCTION OF NIKEL IN CHEMICAL REACTION