When a metal is burnt, its mass is increased by 24 percent. The equivalent mass of the metal will be:
1. 25
2. 24
3. 33.3
4. 76
The equivalent mass of H3PO4 in the following reaction is,
H3PO4 + Ca(OH)2 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 NaNO3 + KCl
2. CaC2O4 + 2HCl CaCl2 + H2C2O4
3. Mg(OH)2 + 2NH4Cl MgCl2 + 2NH4OH
4. Zn + 2AgCN 2Ag + Zn(CN)2