Carbon
What is the atomic number of Carbon?
6
Chlorine is used widely for ________ reagents.
cleaning or disinfectant
Which element makes our bones strong?
Calcium
Chromium is present in which group of the periodic table?
VI
What is the atomic number of Cu?
29
Carbon has how many number of protons ?
6
Chlorine is used in water for __________
Purification
Excess of Calcium effects kidney how?
Stone formation
What is the atomic number of Chromium?
24
Name the element which is best conductor of electricity.
Cu
The hardest substance of carbon allotopies is _________
Carbon fiber
What is the atomic number of Chlorine?
17
What is the atomic number of Calcium?
20
Why Chromium coating is used in bathroom taps ?
To prevent rusting
Why Cu is used in printed circuit boards?
for electrical conduction
Is there any chemical bond between the layers of carbons in graphite?
No
Is chlorine a nobel gas?
No
Name one of the application of plaster of paris.
plastering, statue etc.
Mention one application of Chromium.
Any one application
An alloy of Cu with Zn is called ______
Brass
Diamond and Graphite are example of which type of carbon?
Crystalline
What is the chemical formula of common salt?
NaCl
Which compound is used for food ripening?
Calcium Carbide
Chromium coating is also given to jewellery. (True/False)
True
What is color of Cu ion?
Blue