1. The solubility of which of the following will decrease due to the decrease of pressure?
NaCl \mathrm{NaCl} NaCl
CO2 \mathrm{CO}_{2} CO2
CCl4 \mathrm{CCl}_{4} CCl4
Na2SO4 \mathrm{Na}_{2} \mathrm{SO}_{4} Na2SO4
2. What is the value of cot(sin−1 12)\cot\left(\sin^{-1}\ \frac{1}{2}\right)cot(sin−1 21) ?
13\frac{1}{\sqrt{3}}31
23\frac{2}{\sqrt{3}}32
32\frac{\sqrt{3}}{2}23
3\sqrt{3}3
3. How many grams of NaOHNaOHNaOH are there in 100 mL of 5% NaOHNaOHNaOH solution ?
5
25
40
50
4. What is the minimum value of 2x2−x+2 2 x^{2}-x+2 2x2−x+2 ?
2
158 \frac{15}{8} 815
38 \frac{3}{8} 83
178 \frac{17}{8} 817
5. The time spent in the synthesis phase of cell cycle is-
10−20% 10-20 \% 10−20%
30−40% 30-40 \% 30−40%
30−50% 30-50 \% 30−50%
70−90% 70-90 \% 70−90%