Some Basic Concepts of Chemistry Quiz-1

Convert the $28^\circ C$ temperature into degrees Fahrenheit heat 

What will be the answer of $77.32-6.3$?

A student performs a titration with different burettes and finds titre values of 25.2 mL, 25.25 mL, and 25.0 mL the number of significant figures in the average titre value is

A gaseous mixture contains oxygen and nitrogen in the ratio of 1:4 by weight. Therefore, the ratio of their number of molecules is

The total number of electrons in one molecule of carbon dioxide is

The largest number of molecules is in

When the same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide, the ratio of volumes of hydrogen evolved is

2.76g of silver carbonate on being strongly heating yields a residue weighing

Which has maximum number of molecules?

If 0.44 g of a colourless oxide of nitrogen occupies 224 mL at 1520 mm Hg and $273^\circ C$, then the compound is