Elements and Compounds
Elements and Compounds: Overview
This topic covers concepts, such as, Elements and Compounds, Organic Compounds, Acidic Organic Compounds & pH of Organic Compounds etc.
Important Questions on Elements and Compounds
Which of the following filler material can be used for brazing?
Galvanizing means covering with a thin coat of_____.
The process of making camphor vapor from solid camphor is called _____.
Almost of Earth's crust is made up of eight elements. Which of the following does NOT figure among these elements?
With reference to atomicity, Argon is _____.
Which of the following is the common name of a natural admixture mineral of zinc carbonate and hydrous zinc silicate?
Which of the following gases is naturally formed via the anaerobic decay of phosphorus-containing organic matter?
What is the chemical symbol of Magnesium?
The horizontal rows in the modern periodic table are called_____.
Which of the following is the other name for 'Marsh Gas'?
When we cut an onion, the vegetable emits an odour, and our eyes tear up. Which of the following compounds is responsible for the tears and odour resulting from freshly cut onions?
Topaz is of fluorine and aluminium ____.
Which one of the following element is Monatomic unit?
Which of the following is one of the metals used in LED semiconductor technology?
The elements of the groups to are called ______ elements or transition elements.
Which of the following is NOT used to make toothpaste?
Halogens have _____ electrons in their outermost shells.
Food cans are coated with tin but not with zinc because _____.
Which one of the following is used for manufacturing safety matches?
Why is ethylene dibromide added to petrol?
It increases the octane number of fuel.
It helps in the elimination of lead oxide.
It removes the sulfur compound in petrol.
It serves as a substitute for tetraethyl lead.
Select the correct answer using the codes given below.
