Question

1. catalytic converters are generally made from
a carbon
b alkaline metals
c hydrogen
2. The soft silvery metallic element which ionizes easily when hearted or exposed to light and is present in atomic clocks is
a calcium
b cesium
c cerium
d califonrium
3. The mercury and sodium street lamps light up because of
a atomic absorption
b atomic emission
c elctron absorption
d elctron emission
4. The green colour seen in firework display is due to the chloride salt of
a strontium
b barium
c sodium
d calcium
5. Most commonly used bleaching agent is
a alcohol
b chlorine
c sodium chloride
d carbon dioxide
6. peroxyacetyl nitrate is a
a secondary pollutant
b acidic dye
c plant hormone
d vitamin
7. when a helium atom loses an electron it becomes
a an alpha particle
b a proton
c a positive helium ion
d a negative helium ion
8. the purest form of iron is :
a cast iron
b steel
c pig iron
d wrought iron
9 . combustion is a
a physical and chemical process
b biological process
c physical process
d chemical process
10. chemical formula of vinegar
a nacl
b hci
c h2o
d c2h4o2
chemistry Question with Answers.


Extra Question .

Full form of chemistry ?​

Answer 1

Explanation:

carbon

Hydrogen

Metal

Element

Sorting

Testing

Reacting

Yielding