Calcium and Its Compounds

Q.

Which of the following compounds has the lowest melting point?

1. $CaC{l}_2$

2. $CaB{r}_2$

3. $Ca{I}_2$

4. $Ca{F}_2$

Q. $Ca{C}_2$ reacts with water to give:

1. Methane
2. Ethane
3. Ethylene
4. Acetylene

Q. This section contains 1 Matrix Match type question, which has 2 Columns (Column I and Column II). Column I has four entries (A), (B), (C) and (D), Column II has four entries (P), (Q), (R) and (S). Match the entries in Column I with the entries in Column II. Each entry in Column I may match with one or more entries in Column II.
इस खण्ड में 1 मैट्रिक्स मिलान प्रकार का प्रश्न है, जिसमें 2 कॉलम (कॉलम I तथा कॉलम II) हैं। कॉलम I में चार प्रविष्टियाँ (A), (B), (C) तथा (D) हैं, कॉलम II में चार प्रविष्टियाँ (P), (Q), (R) तथा (S) हैं। कॉलम I में दी गयी प्रविष्टियों का मिलान कॉलम II में दी गयी प्रविष्टियों के साथ कीजिए। कॉलम I में दी गयी प्रत्येक प्रविष्टि का मिलान कॉलम II में दी गयी एक या अधिक प्रविष्टियों के साथ हो सकता है।

Match the Columns and choose the appropriate answer

कॉलमों का मिलान करें और सही उत्तर चुनें

Match the oxoacid given in Column-I correctly with the property(ies) given in Column-II.

कॉलम-I में दिए गए ऑक्सोअम्ल को कॉलम-II में दिए गए गुण/गुणों के साथ सुमेलित कीजिए।

	Column-I कॉलम-I		Column-II कॉलम-II
(A)	Sulphurous acid सल्फ्यूरस अम्ल	(P)	Peroxo linkage परऑक्सो बंधन
(B)	Sulphuric acid सल्फ्यूरिक अम्ल	(Q)	Basicity is 2 क्षारकता 2 है
(C)	Peroxodisulphuric acid परऑक्सोडाईसल्फ्यूरिक अम्ल	(R)	Sulphur in +6 oxidation state सल्फर +6 ऑक्सीकरण अवस्था में है
(D)	Pyrosulphuric acid पायरोसल्फ्यूरिक अम्ल	(S)	S—O—S linkage S—O—S बंधन

1. A-PQR, B-QRS, C-PQRS, D-PQRS
2. A-Q, B-QR, C-PQR, D-QRS
3. A-PQR, B-QRS, C-PQR, D-PQRS
4. A-PQ, B-PQR, C-PQR, D-QRS

Q. More than One Answer Type
एक से अधिक उत्तर प्रकार के प्रश्न

When H₂C₂O₄ is heated then gas (A), gas (B) and liquid (C) are obtained. The gas (A) burns with blue flame and it can be oxidised to gas (B). Then the correct statement(s) for the unknown compound is/are

जब H₂C₂O₄ को गर्म किया जाता है तो गैस (A), गैस (B) तथा द्रव (C) प्राप्त होते हैं। गैस (A) नीली ज्वाला के साथ जलती है तथा यह गैस (B) में ऑक्सीकृत हो सकती है। तब अज्ञात यौगिक के लिए सही कथन है/हैं

1. Gas (A) is CO
   
   गैस (A), CO है
2. Gas (B) is CO₂
   
   गैस (B), CO₂ है
3. 
   
4. Liquid (C) is H₂O
   
   द्रव (C), H₂O है

Q. In the manufacture of sodium carbonate, the following reactions are involved:
$\text{(A)}\stackrel{\Delta }{\to }\text{(B)}+{\text{CO}}_2$
$\text{(B)}+{\text{H}}_2\text{O}\to \text{(C)}\stackrel{N{H}_{4}Cl}{\to }\text{(D)}$
$\text{(E)}+{\text{CO}}_2\to \text{(F)}$
$\text{(F)}+\text{NaCl}\to \text{G}\stackrel{Heat}{\to }{\text{Na}}_2{\text{CO}}_3+{\text{CO}}_2+{\text{H}}_2\text{O}$
${\text{(D) is a gas which is soluble in H}}_2\text{O}$

Compound (A) is:

1. $Ca(HC{O}_3{)}_2$
2. $CaC{O}_3$
3. $Ca{C}_2$
4. $NaHC{O}_3$

Q. In the manufacture of sodium carbonate, the following reactions are involved:
$\text{(A)}\stackrel{\Delta }{\to }\text{(B)}+{\text{CO}}_2$
$\text{(B)}+{\text{H}}_2\text{O}\to \text{(C)}\stackrel{N{H}_{4}Cl}{\to }\text{(D)}$
$\text{(E)}+{\text{CO}}_2\to \text{(F)}$
$\text{(F)}+\text{NaCl}\to \text{G}\stackrel{Heat}{\to }{\text{Na}}_2{\text{CO}}_3+{\text{CO}}_2+{\text{H}}_2\text{O}$
${\text{(D) is a gas which is soluble in H}}_2\text{O}$

Compound (B) is:

1. $CaO$
2. $C{a}_2{O}_2$
3. $Ca{O}_2$
4. $N{a}_{2}O$

Q.

$\begin{array}{cc}\text{List I}& \text{List II}\\ \text{1. Plaster of Paris}& \text{a.}CaS{O}_4.2H_{2}O\\ \text{2. Epsomite}& \text{b.}CaS{O}_4.1/2H_{2}O\\ \text{3. Kieserite}& \text{c.}MgS{O}_4.7H_{2}O\\ \text{4. Gypsum}& \text{d.}MgS{O}_4.H_{2}O\\ & \text{e.}CaS{O}_4\end{array}$

1. 1 - a; 2 - b; 3 - c; 4 - e

2. 1 - b; 2 - c; 3 - d; 4 - a;

3. 1 - b; 2 - d; 3 - c; 4 - a;

4. 1 - a; 2 - c; 3 - d; 4 - b;

Q. $Ca{C}_2$ reacts with water to give:

1. Methane
2. Ethane
3. Ethylene
4. Acetylene

Q. In the manufacture of sodium carbonate, the following reactions are involved:
$\text{(A)}\stackrel{\Delta }{\to }\text{(B)}+{\text{CO}}_2$
$\text{(B)}+{\text{H}}_2\text{O}\to \text{(C)}\stackrel{N{H}_{4}Cl}{\to }\text{(D)}$
$\text{(E)}+{\text{CO}}_2\to \text{(F)}$
$\text{(F)}+\text{NaCl}\to \text{G}\stackrel{Heat}{\to }{\text{Na}}_2{\text{CO}}_3+{\text{CO}}_2+{\text{H}}_2\text{O}$
${\text{(D) is a gas which is soluble in H}}_2\text{O}$

Compounds (E) and (F) are:

1. $N{H}_{4}OH$ and $N{H}_{4}HC{O}_3$
2. $NaOH$ and $NaHC{O}_3$
3. $Ca(OH{)}_2$ and $Ca(HC{O}_3{)}_2$
4. None of these

Q. In the manufacture of sodium carbonate, the following reactions are involved:
$\text{(A)}\stackrel{\Delta }{\to }\text{(B)}+{\text{CO}}_2$
$\text{(B)}+{\text{H}}_2\text{O}\to \text{(C)}\stackrel{N{H}_{4}Cl}{\to }\text{(D)}$
$\text{(E)}+{\text{CO}}_2\to \text{(F)}$
$\text{(F)}+\text{NaCl}\to \text{G}\stackrel{Heat}{\to }{\text{Na}}_2{\text{CO}}_3+{\text{CO}}_2+{\text{H}}_2\text{O}$
${\text{(D) is a gas which is soluble in H}}_2\text{O}$

(G) is $NaHC{O}_3$. The other compound formed with (G) is

1. $N{H}_{4}Cl$
2. $N{H}_{4}OH$
3. $CaC{l}_2$
4. None of these

Q. When calcium carbide reacts with $N_2$ at $1000{}^{o}C$, the compound formed is:

1. $CaC{N}_2$
2. $Ca(CN{)}_2$
3. $C{a}_3{N}_2$
4. $Ca(N{O}_3{)}_2$

Q. In the manufacture of sodium carbonate, the following reactions are involved:
$\text{(A)}\stackrel{\Delta }{\to }\text{(B)}+{\text{CO}}_2$
$\text{(B)}+{\text{H}}_2\text{O}\to \text{(C)}\stackrel{N{H}_{4}Cl}{\to }\text{(D)}$
$\text{(E)}+{\text{CO}}_2\to \text{(F)}$
$\text{(F)}+\text{NaCl}\to \text{G}\stackrel{Heat}{\to }{\text{Na}}_2{\text{CO}}_3+{\text{CO}}_2+{\text{H}}_2\text{O}$
${\text{(D) is a gas which is soluble in H}}_2\text{O}$

Compound (B) is:

1. $CaO$
2. $C{a}_2{O}_2$
3. $Ca{O}_2$
4. $N{a}_{2}O$