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1. 100.0 mL of 0.500 M CaBr₂ and 50.0 mL of 1.00 M NaBr are mixed. What is the concentration of bromide ion in the resulting solution?
1. 0.500 M
2. 0.667 M
3. 0.750 M
4. 1.00 M

2. Which of the following is true, when \(5\) moles of liquid \(\text X\) and \(10\) moles of liquid \(\text Y\) make a solution having a vapour pressure of \(70\) torr?
[Given: The vapour pressures of pure \(\text X\) and \(\text Y\) are \(63\) torr and \(78\) torr respectively]

1.	The solution is ideal.
2.	The solution has a volume that is greater than the sum of individual volumes.
3.	The solution shows positive deviation.
4.	The solution shows negative deviation.

3. The freezing point (in °C) of a solution containing 0.1 g of \(K_3[Fe(CN)_6]\)(Mol. wt. 329) in 100g of water is:
 \((K_f = 1.86 K~kg~mol^{-1})\) 
1. \(-2.3 \times 10^{-2}\)
2. \(-5.7 \times 10^{-2}\)
3. \(-8.7 \times 10^{-3}\)
4. \(-1.2 \times 10^{-2}\)

4. For the compound MX₂, the observed mass is 65.6, while the normal mass is 164. The percentage degree of ionization of MX₂ (rounded to the nearest integer) is:
1. 75
2. 60
3. 50
4. 85

5.