Which of the following is essential to form haemoglobin

The green colour of the leaves is due to-

Amalgam is a mixture of

Which of the following metals is the lightest? 

How many carbon atoms are present in a molecule of glucose?

Which substance is commonly used as a thermometric material in thermometers due to its expansive properties under temperature changes?

What is the chemical formula of Urea, the best nitrogenous fertilizer?

Which of the following statements about the modern periodic table is NOT correct?

Oil and water can form a stable dispersion with the help of a substance commonly called a(n):

When copper sulphate solution reacts with iron metal, copper metal is formed. Which of the following reactions is this?

What type of substance is commonly used as a thermometric material due to its responsiveness to temperature changes?