The equivalent mass of H₃PO₄ in the following reaction is,

H₃PO₄ + Ca(OH)₂ $\to$CaHPO₄ + 2H₂O

1. 98

2. 49

3. 32.66

4. 40

1.520g of the hydroxide of a metal on ignition gave 0.995 g of oxide. The equivalent mass of metal is:

1. 1.520

2. 0.995

3. 19.00

4. 9.00

What will be the normality of a solution obtained by mixing 0.45 N and 0.60 N NaOH in the ratio 2:1 by volume?

1. 0.4 N

2. 0.5 N

3. 1.05 N

4. 0.15 N

A metal oxide is reduced by heating it in a stream of hydrogen. It is found that after complete reduction, 3.15 g of the oxide have yielded 1.05g of the metal. We may deduce that:

1. the atomic mass of the metal is 8

2. the atomic mass of the metal is 4

3. the equivalent mass of the metal is 4

4. the equivalent mass of the metal is 8

An oxide of metal has 20% oxygen, the equivalent mass of oxide is:

1. 32 

2. 40

3. 48

4. 52

A compound contains atoms of three elements A,B and C. If the oxidation number of A is +2, Bis +5 and that of C is -2, the possible formula of the compound is : 

1. A₂(BC₃)₂
2. A₃(B₄C)₂
3. A₃(BC₄)₂
4. ABC₂ 

The number of peroxide linkages in CrO₅ is /are

1. One

2. Two

3. Three

4. None of the above

Conversion of PbSO₄ to Pbs is:

1. Reduction of S

2. Oxidation of S

3. Dissociation

4. None of the above

Redox reaction among the following is -

1. NaCl + KNO₃ $\to$NaNO₃ + KCl

2. CaC₂O₄ + 2HCl $\to$CaCl₂ + H₂C₂O₄

3. Mg(OH)₂ + 2NH₄Cl $\to$MgCl₂ + 2NH₄OH

4. Zn + 2AgCN $\to$2Ag + Zn(CN)₂

The oxidation number of Fe in K₃[Fe(CN)₆] is-

1. +2

2. +3

3. +4

4. +1