[sadiqeen]

There is reaction to make a lighter gas (i.e) lighter than air so it is used for lifting balloons.  The reaction includes Aluminum, baking soda & another chemical which I don't know.

Please tell me the reaction and what is that 3rd chemical?

[Borek]

You have to show your attempts at answering the question to receive help. This is a forum policy.

What gases lighter than air do you know?

[sadiqeen]

i don't know what is that gas. but  according to wikipedia, the gas may be

Neon
Ammonia
Methane
Hydrogen
helium

since the reaction include baking soda which contains hydrogen, so it miight be hydrogen but not sure (it is a guess). all that i know is given in question, i hope some one will try to find that reaction and the third chemical.

[curiouscat]

You can eliminate Ne / He with some thought based on your raw materials.

[Borek]

i hope some one will try to find that reaction and the third chemical.

Isn't it your job to solve the problem? I thought that's the idea of a homework.

You did a step in the right direction with these gases. As curiouscat already signalled - noble gases can't be produced in reactions.

You guessed hydrogen - can you think of any reactions in which it can be produced?

[sadiqeen]

i searched on google but didn't find it. secondly i am not a chemist that's why i am here to take favour of your experience and knowlege.

[billnotgatez]

The reaction includes Aluminum, baking soda & another chemical which I don't know.

@sadiqeen
Where did you get this idea - Can you give a link

[Borek]

i searched on google but didn't find it. secondly i am not a chemist that's why i am here to take favour of your experience and knowlege.

Can you think of a reaction of the metal that would produce hydrogen?

[sadiqeen]

The reaction includes Aluminum, baking soda & another chemical which I don't know.

@sadiqeen
Where did you get this idea - Can you give a link

some one asked me about the third chemical. the lighter gas is used in balloons. ( not  hot air balloons) simple toy balloons

[sadiqeen]

i searched on google but didn't find it. secondly i am not a chemist that's why i am here to take favour of your experience and knowlege.

Can you think of a reaction of the metal that would produce hydrogen?

the reaction include three reactants(aluminium, baking soda and a third chemical which i don't know.) may be one of them is a catalyst

[Arkcon]

sadiqeen: we've already asked you to read the Forum Rules{click}, and I want you to read them carefully this time.  We don't give complete answers to any question on this forum, we always want someone to learn the basics themselves, even if they're not an expert.  In fact, the less someone knows, the less sure we are they can handle the chemicals safely, and the less we want to help.  Your reaction quoted is a bad one, there are other reactions.  Your list of the lighter than air gasses is technically correct, but many of your gasses have only 90% the density of air, you should realize that you can't lift a solid container, even the thinnest of balloons, with a gas only slightly lighter than air.  You have work to do, and we won't do it all for you.

[Arkcon]

You can also look at this thread:  http://www.chemicalforums.com/index.php?topic=78559.0;topicseen

[billnotgatez]

@sadiqeen

You got to participate to get an answer.
Just repeating over and over

the reaction include three reactants(aluminium, baking soda and a third chemical which i don't know.) may be one of them is a catalyst

Is not going to do

Even a simple answer to my question which you can do would help

Quote

    The reaction includes Aluminum, baking soda & another chemical which I don't know.

@sadiqeen
Where did you get this idea - Can you give a link

You did not get this idea out of nothing
Where did it come from and is there a link to it on the internet?