Which of the following metals does not react with cold or hot water?

The anode in a dry cell consists of 

'Every substance in the world is made up of very fine particles.' Who said this first?

What is the increase in the ratio of oxygen in a chemical reaction?

Which of the following metals burns with a golden flame?

There is abundant available metal in the crust?

Which energy is converted into electrical energy by a solar cell?

If the pH value of a substance is lower than 7, it would be considered as–