Cyanamide

Q. In the extraction of $Ca$ by electro reduction of molten $CaC{l}_2$ some $Ca{F}_2$ is added to the electrolyte for the following reason:

1. To keep the electrolyte in liquid state at temperature lower than the melting point of $CaC{l}_2$
2. To effect precipitation of $Ca$
3. To effect the electrolysis at lower voltage
4. To increase the current efficiency

Q.

Which of the following are used as fertilizers?

1. $N{H}_{4}N{O}_3$

2. $C{a}_3(P{O}_4{)}_3$

3. $Ca(H_{2}P{O}_4{)}_2$

4. $CaNCN$

Q. Write the word equation and the chemical equation for Magnesium ribbon burned in air.

Q.

Which of the following are used as fertilizers?

1. $N{H}_{4}N{O}_3$

2. $C{a}_3(P{O}_4{)}_3$

3. $Ca(H_{2}P{O}_4{)}_2$

4. $CaNCN$

Q. Complete the following equation and identify $A$ and $B$.
$R-\underset{O}{\underset{||}{C}}-N{H}_2\stackrel{B{r}_2+KOH}{\to }\left[A\right]\stackrel{CHC{l}_3+KOH}{\to }\left[B\right]$

Q. $AgN{O}_{3\left(aq\right)}+H_2{S}_{\left(aq\right)}\to A{g}_2{S}_{\left(g\right)}+HN{O}_{3\left(aq\right)}$
When the equation for the reaction represented above is balanced and all coefficient are reduced to lowest whole number terms, the coefficient for $AgN{O}_3\left(aq\right)$ is.

1. 1
2. 5
3. 2
4. 3
5. 4

Q. Calcium Cyanamide - CaNCN, which is produced by the Nitrogen fixation reaction of heating $Ca{C}_2$ and $N_2$ is black in colour – True or False?

1. True
2. False

Q. State true or false.

1. True
2. False

Q. Calcium Cyanamide - CaNCN, which is produced by the Nitrogen fixation reaction of heating $Ca{C}_2$ and $N_2$ is black in colour – True or False?

1. True
2. False

Q. The substances you start with are called ______ and after the chemical change, what is formed is called the _______.

1. reactants, products
2. reactants , gases
3. element , products
4. element , compounds

Q. Which of the following are used as fertilizers?

1. $C{a}_3(P{O}_4{)}_2$
2. $CaNCN$
3. $Ca(H_{2}P{O}_4{)}_2$
4. $Ca{C}_2$

Q. $H_{2}O$ vapours on passing through anhydrous
$CuS{O}_4$ turns it to:

1. green
2. blue
3. violet
4. white

Q. Give equation to express the reaction between:

Q.

Which of the following are used as fertilizers?

1. $N{H}_{4}N{O}_3$

2. $C{a}_3(P{O}_4{)}_3$

3. $Ca(H_{2}P{O}_4{)}_2$

4. $CaNCN$