Properties of Methane

Q. What is the weight of oxygen required for complete combustion of 2.86 kg of ethylene

Q. Question 20.4

Write the balanced chemical equation for the following reaction and identify the type of reaction:

Ethanol is burnt in air to form carbon dioxide, water and releases heat.

Q. The products obtained after the complete combustion of methane are ______ and ______.

1. carbon monoxide, water
2. oxygen, nitrogen dioxide
3. carbon dioxide, water
4. hydrogen, oxygen

Q. Methane burns readily in air. Write the balanced chemical equation for it.

1. $C{H}_4+2O_2\to C{O}_2+2H_{2}O$
2. $C{H}_4+3O_2\to C{O}_2+2H_{2}O$
3. $C{H}_4+5O_2\to 3C{O}_2+2H_{2}O$
4. $C{H}_4+7O_2\to 2C{O}_2+2H_{2}O$

Q. Bakelite is a:

1. Both A and B
2. None
3. Urea formaldehyde resin
4. Phenol formaldehyde resin
   

Q. Which of the following cannot be considered as a mechanistic step in chain reaction of methane with $C{l}_2$ ?

1. $C{l}_2\to C{l}^{\ast }$
2. $C{H}_4+C{l}^{\ast }\to C{H}_{3}Cl+H^{\ast }$
3. $C{l}^{\ast }+C{H}_4\to C{H}_3^{\ast }+HCl$
4. $C{l}^{\ast }+C{H}_3^{\ast }\to C{H}_{3}C{l}^{\ast }$

Q. Methane burns in excess of air or oxygen with :

1. yellow flame
2. blue flame
3. orange red flame
4. apple green flame

Q. ${\mathrm{CH}}_4\left(g\right)+{\mathrm{Cl}}_2\left(g\right)\to {\mathrm{CH}}_3\mathrm{Cl}\left(g\right)+\mathrm{HCl}\left(g\right)$

Which of the following are true about the above reaction?

1. The reaction is called chlorination of methane.
2. It happens in the presence of UV light.
3. One of the products formed is chloroethane.
4. It requires a temperature of $2500{}^{0}C-3000{}^{0}C$.

Q. Methane exists as at room temperature.

1. solid
2. liquid
3. gas

Q. Identify the properties of methane gas.

1. Odourless
2. Colourless
3. Non-toxic
4. Red flame on combustion

Q. Methane is sparingly soluble in _______.

1. gasoline
2. ether
3. water
4. alcohol

Q. Which of the following will not react with methane under normal conditions?

1. $I_2$
2. $C{l}_2$
3. $B{r}_2$
4. $F_2$

Q. What happens when methane is burnt in air ?

Q. If a mixture of methane, ammonia and oxygen is passed over Pt-gauge at ${700}^{\circ }C$ then the product will be:

1. $HCOOH$
2. $HCN$
3. all of these
4. $C{H}_{3}N{H}_2$

Q. What is water gas?

1. $C{O}_2$ and $H_{2}O$
2. $CO$ and $H_2$
3. $C{H}_{3}OH$ and $H_2$
4. None of these

Q. If 20 cc of methane is burnt using 50 cc of oxygen, the volume of the gases left after cooling to room temperature will be:

1. 60 cc
2. 70 cc
3. 30 cc
4. 50 cc

Q. The products obtained after the complete combustion of methane are ______ and ______.

1. carbon dioxide, water
2. carbon monoxide, water
3. hydrogen, oxygen
4. oxygen, nitrogen dioxide

Q. Which of the following are the products obtained if one molecule of chlorine reacts with methane in the presence of UV light?

1. Methyl chloride
2. Hydrogen chloride
3. Ethyl chloride
4. Water

Q. Which of the following reaction of methane is incomplete combustion?

1. $2C{H}_4+O_2\stackrel{Cu/523K/100atm}{\to }2C{H}_{3}OH$
2. $C{H}_4+O_2\stackrel{M{o}_2{O}_3}{\to }HCHO+H_{2}O$
3. $C{H}_4+O_2\to C{O}_{2\left(s\right)}+2H_2{O}_{\left(l\right)}$
4. $C{H}_4+O_2\to C_{\left(s\right)}+2H_2{O}_{\left(l\right)}$

Q. What is the colour of methane gas at room temperature?

1. Green
2. Colourless
3. Red
4. Yellow