Carbonates and Bicarbonates

Q.

If you are provided with two colourless liquid that is Benzene and water how will you be able to distinguish between them

Q.

Why the enthalpies of fusion for all reactions are positive?

Q.

Which of the given compounds has the formula ${\mathrm{NaHCO}}_3$?

1. Vinegar

2. Baking soda

3. Caustic Soda

4. Washing soda

Q. Why fused Calcium chloride and concentrated sulphuric acid is used in a desiccator?

Q.

The chemical formula of baking soda is

1. $N{a}_{2}C{O}_3$

2. $CaC{O}_3$

3. $NaC{O}_3$

4. $NaHC{O}_3$

Q. How much amounheating caco 3 in gram having percentage purity 50% produce 0.56 litre of co2 at STP on heating?

Q. A 2gm sample containing sodium carbonate and sodium bicarbonate loses .248 gm when heated at 300 degree Celsius, the temperature at which sodium carbonate decomposes to produce sodium carbonate and water. What is the percentage of sodium carbonate in the mixture.

Q.

The anhydride of carbonic acid is:

1. $CO$

2. $C{O}_2$

3. $C_3{O}_2$

4. $\text{None of these}$

Q. when a mixture containing PCl3 and PCl5 is heated with ethyl alcohol total of 4 moles of ethyl chloride is formed. Mole ratio of PCl3 and PCl5 in the mixture is
a) 3:1 b) 1:1 c) 1:3 d) 2:1

Q.

Fusion mixture is

1. 

2. 

3. 

4. 

Q.

Which of the following can be a method of preparation of a carbonate?

1. By passing through an alkali

2. By reacting basic oxides and

3. By precipitation from heavy metal carbonates

4. None of these

Q.

$C{O}_2+H_{2}O\rightleftharpoons$ ?

1. Cyanogen

2. Calcium Cyanamide

3. None of these

4. Cyanide

Q.

Hybridisation of carbon atom in $C{O}_3^{2-}$ is

1. $sp$

2. $s{p}^2$

3. $s{p}^3$

4. $\text{None of these}$

Q. The common name of sodium bicarbonate is:

1. $N{a}_{2}C{O}_3$

2. $NaHC{O}_3$

3. $NaOH$

4. $NaCl$

Q.

Which of the given compounds has the formula ${\mathrm{NaHCO}}_3$?

Q. On heating limestone, the following are formed:

1. Calcium hydroxide, carbon dioxide
2. Calcium bicarbonate
3. Calcium oxide and carbon dioxide
4. Calcium oxide and water