Carbon Dioxide

Q.

Which of the following statements are correct

I. Both $LiCl$ and $MgC{l}_2$ are soluble in ethanol

II. Both $LiCl$ and $MgC{l}_2$ are deliquescent

III. $LiCl$ and $MgC{l}_2$ forms hydrates like $LiCl.8H_{2}O$ and $MgC{l}_2.2H_{2}O$

IV. $NaHC{O}_3$ used as fire extinguisher

1. I, II, IV correct

2. Only III correct

3. All are correct

4. I, II, III correct

Q.

Match List I with List II and select the correct answer using the codes given below the lists

$ListI\left(pollutant\right)ListII\left(Source\right)$

(A) $Microorganisms\left(1\right)Chemicalfertilizers$

(B) $Plantnutrients\left(2\right)Abandonedcoalmines$

(C) $Sediments\left(3\right)Domesticsewage$

(D) $Mineralacids\left(4\right)Erosionofsoilbystripmining$

$\left(5\right)Detergents$

1. A3, B1, C4, D2

2. A2, B5, C3, D1

3. A1, B3, C2, D4

4. A4, B2, C1, D5

Q. Carbon dioxide molecule contains

1. single covalent bond
2. double covalent bond
3. triple covalent bond
4. ionic bond

Q.

Dry ice is an example of __________

Q.

Identify the correct order of acidic strength of $C{O}_2$, $CuO$, $CaO$, and $H_{2}O$:

1. $CaO<CuO<H_{2}O<C{O}_2$

2. $H_{2}O<CuO<CaO<C{O}_2$

3. $CaO<H_{2}O<CuO<C{O}_2$

4. $H_{2}O<C{O}_2<CaO<CuO$

Q. $C{O}_2$ is not a poisonous gas but there is increase in concentration of $C{O}_2$ in the atmosphere due to burning of fossil fuels and decomposition of limestone. The increase in concentration of $C{O}_2$ may lead to :

1. Increase in photosynthesis in plants
2. Higher concentration of $C{O}_2$ in water
3. Increase in greenhouse effect, thus raising the temperature
4. Increase in formation of metal carbonates

Q. Carbonation

Q. Match the following:
$\begin{array}{cccc}& \text{Oxide}& & \text{Nature}\\ \text{(a)}& N_{2}O& \text{(i)}& \text{Acidic}\\ \text{(b)}& S{O}_3& \text{(ii)}& \text{Amphoteric}\\ \text{(c)}& Pb{O}_2& \text{(iii)}& \text{Basic}\\ \text{(d)}& N{a}_{2}O& \text{(iv)}& \text{Neutral}\end{array}$
Which options of the following is correct?
$\begin{array}{ccccc}& \text{(a)}& \text{(b)}& \text{(c)}& \text{(d)}\\ \text{(1)}& \text{(i)}& \text{(ii)}& \text{(iv)}& \text{(iii)}\\ \text{(2)}& \text{(i)}& \text{(iv)}& \text{(iii)}& \text{(ii)}\\ \text{(3)}& \text{(iv)}& \text{(i)}& \text{(ii)}& \text{(iii)}\\ \text{(4)}& \text{(ii)}& \text{(i)}& \text{(iv)}& \text{(iii)}\end{array}$

Q.

Structural units of ice and dry ice are, respectively.

1. 

2. 

3. 

4. 

Q. Which of the following is less soluble in water and forms weakly acidic aqueous solution?

1. $O_2$
2. ${CO}_2$
3. $N_2$
4. $H_2{SO}_4$
5. $He$

Q. Complete combustion of methane gives

1. Only $C{O}_2$
2. $C{O}_2$ and $CO$
3. $CO,C{O}_2$ and $H_{2}O$
4. $C{O}_2\text{and}{H}_{2}O$

Q. Which of the following is not true about structure of carbon dioxide?

1. In $C{O}_2$, carbon is sp-hybridised
2. C forms two sigma bonds one with each oxygen atom and two $p\pi -p\pi$ bonds
3. $C{O}_2$ is a linear covalent compound
4. It is a polar molecule

Q. Statement 1 : A wooden splint is set on fire and blown out, leaving a hot, glowing end. When the glowing splint is inserted into a sample of purified ${CO}_2$ gas, it will reignite into a flame.
Statement 2 : ${CO}_2$ gas contains oxygen.

1. Both the Statement 1 and Statement 2 are not correct.

2. Both Statement 1 and Statement 2 are correct and Statement 2 is the correct explanation of Statement 1.

3. Statement 1 is correct but Statement 2 is not correct.

4. Both Statement 1 and Statement 2 are correct and Statement 2 is not the correct explanation of Statement 1.

5. Statement 1 is not correct but Statement 2 is correct.

Q. Which among the following greenhouse gas implicated in global warming?

1. ${NH}_3$
2. ${CO}_2$
3. $N_2$
4. $O_2$
5. ${CH}_4$

Q.

why gases do not settle down at the bottom of the container when kept in it?

Q. $C{O}_2$ is a gas whereas $Si{O}_2$, is a solid. Explain with reason.

Q. Removal of carbondioxide from atmosphere takes place by a process known as photosynthesis. in this context complete the equation given below:
$C{O}_2+H_{2}O\to$

1. $H_{2}C{O}_3$
2. $O_2$
3. $C_6{H}_{12}{O}_6$
4. (b) and (c) above.

Q. Removal of carbondioxide from atmosphere takes place by a process known as photosynthesis. in this context complete the equation given below:
$C{O}_2+H_{2}O\to$

1. $H_{2}C{O}_3$
2. $O_2$
3. $C_6{H}_{12}{O}_6$
4. (b) and (c) above.

Q. If CO₂ gas is soluble in water at room temp then y doesnt the CO₂ in air combine to form H₂CO₃ acid in atmosphere in that case water wouldnt exist in its original form instead it would be carbonic acid

Q.

Suppose you have to determine the percentage of carbon dioxide in a sample of a gas available in a container. Which of the following is the best absorbing material for the carbon dioxide?

1. Heated copper oxide

2. Cold, solid calcium chloride

3. Cold, solid calcium hydroxide

4. Heated charcoal

Q.

Structural units of ice and dry ice are, respectively.

1. $H_{2}O,CO$

2. $H_{2}O,C{O}_2$

3. $C{O}_2,H_{2}O$

4. $CO,C{O}_2$

Q. Some statements related to carbon monoxide and carbon dioxide are given. Classify them correctly.

Q. which of the following oxide is most acidic? and how?
a Na₂O b Al₂O₃ c P₂O₅ d SO₃

Q. Some statements related to carbon monoxide and carbon dioxide are given. Classify them correctly.

Q. Q. What will happen if green house gases were totally missing in earth’s atmosphere? Explain?