Which gas is known as laughing gas?
Which gas is known as laughing gas?
Avogadro number is approximately:
Avogadro number is approximately:
The process of conversion of solid directly into gas is called:
The process of conversion of solid directly into gas is called:
The number of valence electrons in oxygen is:
The number of valence electrons in oxygen is:
The main ore of aluminium is:
The main ore of aluminium is:
The hardest naturally occurring substance is:
The hardest naturally occurring substance is:
Which metal is liquid at room temperature?
Which metal is liquid at room temperature?
Which gas is released during photosynthesis?
Which gas is released during photosynthesis?
Which type of bond is present in NaCl?
Which type of bond is present in NaCl?
Which acid is present in vinegar?
Which acid is present in vinegar?
The pH value of pure water at 25°C is:
The pH value of pure water at 25°C is:
The atomic mass unit (amu) is based on:
The atomic mass unit (amu) is based on:
Rusting of iron is an example of:
Rusting of iron is an example of:
The functional group –OH represents:
The functional group –OH represents:
Which element is present in all organic compounds?
Which element is present in all organic compounds?
The chemical formula of washing soda is:
The chemical formula of washing soda is:
Which compound is used as an antacid?
Which compound is used as an antacid?
The atomic number of an element is equal to the number of:
The atomic number of an element is equal to the number of:
Which salt is obtained by neutralization of HCl with NaOH?
Which salt is obtained by neutralization of HCl with NaOH?
The SI unit of amount of substance is:
The SI unit of amount of substance is: