Understanding the temperature at which water achieves its highest density is key. Water behaves uniquely compared to most substances.
Which of the following compounds is also called ‘Norwegian saltpeter’?
How many elements were known when Mendeleev started his work?
Which of the options given below is called laughing gas?
A. N 2O
B. CO 2
C. H 2O
D. SO 2
Stainless steel is
A. A compound
B. A mixture
C. An element
D. An alloy
What is the freezing point of water on Kelvin scale?
केल्विन पैमाने पर जल का हिमांक कितना होता है?