The noble gas, argon,is used for
electric arc welding
welding brass
underwater welding
steel welding
Correct answer is A
No explanation has been provided for this answer.
0.097 mm
0.194 mm
0.388 mm
2.388 mm
Correct answer is A
No explanation has been provided for this answer.
The shapes of CO2, H2O and CH 4 respectively are
bent, linear and tetrahedral
bent, tetrahedral and linear
linear, bent and tetrahedral
tetrahedral, linear and bent
Correct answer is C
No explanation has been provided for this answer.
The knowledge of half-life can be used to
create an element
detect an element
split an element
irradiate an element
Correct answer is B
No explanation has been provided for this answer.
Which of the following types of bonding does not involve the formation of new substance?
Metallic
covalent
Co-ordinate
Electrovalent
Correct answer is A
No explanation has been provided for this answer.