1 |
The major constituent of air is
|
Nitrogen<br>
Carbon dioxide<br>
Oxygen<br>
Hydrogen<br>
|
2 |
What is the farthest planet that can be seen without a telescope? |
uranus
neptune
saturn
jupiter
|
3 |
The materiel that can be permanently deformed by heat band pressure is called a
|
Thermoplastic <br>
Thermoset <br>
Chemical compound <br>
Polymer<br>
|
4 |
The sun is composed mainly of these two elements |
hydrogen and helium
helium and argon
nitrogen and hydrogen
carbon and oxygen
|
5 |
The maximum number of covalent bonds formed by nitrogen is
|
1
2
3
4
|
6 |
The melting and boiling points of ionic solids
|
high <br>
low <br>
intermediate <br>
very low <br>
|
7 |
The great dark spot-a cloud of methane as big as the earht itself can be found on planet? |
saturn
jupiter
neptune
mercury
|
8 |
The melting point of copper is
|
1083°C<br>
732°C<br>
327°C<br>
1835°C
|
9 |
The members of a homologous series have
|
The same physical properties<br>
different function groups <br>
same chemical properties<br>
different method of preparation<br>
|
10 |
The earth revoles around the sun at a speed of |
6 million, million kms
7,50 million,million kms
9.50 million,million kms
11 million, million kms
|