1. C2H6
2. CO2
3. CO
4. CH4
CO
1. Ca(H2PO4).H2O+CaCl2 2H2O
2. Ca(H2PO4).H2O+2CaSO4 2 H2O
3. Ca3(PO4)2.H2O+2CaSO4 2H2O
4. Ca3(PO4)2.H2O+CaCl2 2H2O
Ca(H<sub>2</sub>PO<sub>4</sub>).H<sub>2</sub>O+2CaSO<sub>4</sub> 2 H<sub>2</sub>O
1. increases
2. decreases
3. does not change
4. changes irregularly
decreases
1. Both have similar reactivity with water
2. Oxygen is colourless and ozone is colored
3. Oxygen valency is 2 in both
4. Oxygen has 2 bonds and ozone has 3 bonds
Both have similar reactivity with water
1. Cl
2. Br
3. I
4. F
F
1. Proton
2. α-particle
3. β-particle
4. Deuteron
α-particle
1. 1.3*10-3
2. 1.3*10-6
3. 1.3*10-7
4. 1.3*106
1.3*10<sup>-6</sup>
1. reduced to half
2. doubled
3. reduced by 1000 times
4. increased by 1000 times
reduced by 1000 times
1. oxidation of Cu2+
2. reduction of Cu2+
3. hydrolysis of CuSO4
4. ionization of CuSO4
reduction of Cu<sup>2+</sup>
1. 2.016
2. 20.16
3. 2.24
4. 22.4
2.016