1. Which one is a sedimentary rock?
Coal
Granite
Basalt
Marble
2. 1∣2x−3∣>5 \frac{1}{|2 x-3|}>5 ∣2x−3∣1>5; What is the solution of this inequality?
(75,23) \left(\frac{7}{5}, \frac{2}{3}\right) (57,32)
(32,85) \left(\frac{3}{2}, \frac{8}{5}\right) (23,58)
(75,32)∪(32,85) \left(\frac{7}{5}, \frac{3}{2}\right) \cup\left(\frac{3}{2}, \frac{8}{5}\right) (57,23)∪(23,58)
(75,85) \left(\frac{7}{5}, \frac{8}{5}\right) (57,58)
3. Which one of the following is an alkali oxide?
N2O5 \mathrm{N}_{2} \mathrm{O}_{5} N2O5
Na2O \mathrm{Na}_{2} \mathrm{O} Na2O
H2O \mathrm{H}_{2} \mathrm{O} H2O
PbO2 \mathrm{PbO}_{2} PbO2
4. রসাত্মক ও ব্যাঙ্গধর্মী রচনার সংকলন কোনটি?
কপালকুন্ডলা
বিষবৃক্ষ
কমলাকান্তের দপ্তর
চন্দ্রশেখর
5. If the ratio of time periods of two different simple pendulum is 1:2, then what is the ratio of the respective effective lengths?
1:2 1: \sqrt{2} 1:2
1:4
1:2
2:1