Gas stove knobs are sticking when i try to turn on a burner.

You didn't say whether you have a gas or electric oven, or oven & stove. I'll assume you have a stove, just to cover all bases.

First, you should shut down the oven: a gas stove will have a valve on the gas line behind the stove. The valve will either have a red handle or a flat stem that usually has a hole in it. Turn either valve 1/4 turn to shut off gas, use a wrench on the flat stem. An electric stove should be shut off by flipping off the double circuit breaker for it in your electric panel. Do not unplug an electric stove when it is on; this can damage the plug &/or electrocute you.

Most likely the inside of the knob has stripped out. Look at the knob for a hole that has a setscrew in it: a small allen wrench or screwdriver will loosen the setscrew, most knobs don't have them and will pull off. Be careful to use even pressure on two sides of the knob; if you can't pull it off, use two butter knives or flat screw drivers to pry it up enough to get a grip on it.

Look at the center stem on the back of the knob, it will likely be cracked or stripped. Some stems have a D-shaped metal insert that strips out inside the plastic stem. If you have one, pull off a burner knob and compare the stems in the back, if they are the same size, put the burner knob on the shaft for the oven control, and use that knob to turn the oven control off.

If the burner knob won't fit, use your fingers or a pair of pliers (gently) to turn off the oven control shaft. If the shaft stops normally, you can turn the stove back on using either the gas valve or the circuit breaker. If you have a gas stove that doesn't have electric ignition (a clicking noise when you turn on a burner) you may need to re-light the pilots for the burners. Lift the covers off the burners to re-light the pilots.

If you have succeeded in turning off the oven, you need a new knob -- you can get one at an appliance parts store or maybe a hardware store. If the oven control did not turn off normally, I would leave the oven/stove turned off: the control itself will need to be replaced by a qualified repair person.

When you went to use the stove again it sounds like a burner did not light. The gas built up and then came into contact with a flame and ignited. Gas, propane or natural, does not float around and dissipate, it settles and builds up, which is what it sounds like happened, and then ignites with a flame or spark. When you suspect that gas has been on, it is best to wait and turn a fan or something on to dissipate the gas before trying to light a burner...

the burner themocouples need replacing...

either turn down the gas knob or turn knobs to lowest setting without going out. That is about your only options

You can use either a rolled up newspaper to stop the dog or go to this site for child safety items.

http://www.123safe.com/cgi-bin/SoftCart.exe/scstore/p-1032332AK.html?E+scstore

http://www.shop.com/+-a-child+locks+for+gas+stove+knobs-p127480814-g1-k24-st.shtml

http://www.kidproteq.com/Home-Safety/Kitchen-Safety/Clear-View-Stove-Knob-Covers-p189.html

You just need to turn the knob a bit more, thats the igniter you are hearing.

my gas stove top burner will not ingnite when I turn on the gas.
I have gas supply to the house, the gas stove top makes the tick tick noise when you
turn one of the burners on, but no flame, even if you try using a match.
What all can I checK?

your ignition button is sticking down after you press it to light the burners, give it a few taps and clean underneath the button.

Turning any knob starts the spark via a switch behind each which should disengage when the (any) knob is turn further.
One of your switches is stuck.

I think you should be able to remove the range-top for access and find the offending switch.
It is probably gummy from a spill and is no longer in solid contact with the cam that operates it.

A solvent/lubricant such as WD-40 sprayed on the plunger of the switch once you can see it and operating the knob back and forth should free it up.

It might be wise to turn off the gas supply while tinkering with the range - blow your house away and the range won't matter. :-(