61 – 13 = 48 48 + 26 = 74 74 – 39 = 35 35 + 52 = 87 87 – 65 = 22
Anesthesia which is administered during the surgeries in the hospitals is a mixture of which of the following gases?
What is heavy water?
Turquoise is an ore/mineral of:
Which of the following pair of element – atomicity is correct?
I. Helium – monoatomic
II. Oxygen – triatomic
A mixture of carbon monoxide and hydrogen is known as ______
What is the common characteristic of elements in the same group of the periodic table?
What is the main chemical used in the production of matchsticks?
Ethane gas has a slightly _____ taste.
What are diatoms?
What defines an ion?
