NaCl has which kind of bonds?
Modern periodic table has ______ groups and ______ periods.
Which gas is produced due to incomplete combustion of fuel?
_________is a formula for rust.
Which of the following is not a natural polymer?
The conversion of hard water into soft water by boiling or adding calcium hydroxide is called:
Which gas is commonly used in electric bulbs to prevent oxidation?
Which drug is used as an anti-inflammatory?
A mixture of carbon monoxide and hydrogen is known as ______
Biofertilizers convert nitrogen to:
