Which of the following is a dibasic acid?

$(i)$ Name a metal which does not stick to glass.
$(ii)$ Name the metal which is commonly used in thermite welding.
$(iii)$ What is the nature of zinc oxide?

How can metals be differentiated from non-metals on the basis of any three chemical properties?

Name the following:
$(a)$ $A$ metal which is preserved in kerosene.
$(b)$ $A$ lustrous coloured non-metal.
$(c)$ $A$ metal which can melt while kept on palm.
$(d)$ $A$ metal which is a poor conductor of heat.

Which gas is used in the process of converting vegetable oils into vegetable ghee?

Which of the following oxide$(s)$ of iron would be obtained on prolonged reaction of iron with steam?