Subject Code : 1 2 7 BAF Shaheen College Dhaka
Practice Preparatory Test Examination-1 : 2020 Class X
(English Version) Subject : Science (MCQ)
Time : 30 Minutes Full Marks30
[ Darken the circle (O) with black ball point pen from the alternatives ] 1. Which one is the strongest and longest natural
fiber?
a Nylon b Wool
c Silk d Rayon
2. What is the formula of vinegar?
a C6H6O7 b CH3COOH c NaHCO3 d COOH – COOH 3. Which of the following is used to prepare
cement?
a Silver b Gypsum c Quartz d Magnetite 4. What is the percentage of water in soil?
a 5% b 25% c 35% d 45%
5. When ants bite which acid secrets?
a Formic b Acetic c Oxalic d Nitric
6. Which crop will give highest production in 5-6 pH range?
a Potato b Paddy
c Barly d Tomato
7. For water purification which of the following is used as disinfectants
i. Cl2
ii. Ca(OCl)Cl iii. NaCl
Which one is correct?
a i & ii b i & iii c ii & iii d i, ii & iii 8. In our country natural gas is used in
i. 11% in domestic purpose
ii. 22% is used for producing electricity iii. 22% is consumed in industry
Which one is correct?
a i & ii b i & iii c ii & iii d i, ii & iii 9. Which one of the following is the main reason of
climate change?
a Flood b Drought
c Global warming d Acid rain
10. For sustaining aquatic biota which of the following pH range is suitable?
a 1-3 b 4-5 c 6-8 d 10-12
11. Which of the following gas is responsible for acid rain?
a P2O b CO2 c O2 d SO2
12. Which one of the following is thermosetting plastic?
a Polythene b PVC c Polyester d Melamine
13. By burning PVC which of the following gas is produced?
a HCN b CO c HCl d H2S 14. For which fiber Heckling is used?
a Linen b Cotton
c Silk d Rayon
15. Which catalyst is used in the preparation of polythene?
a AgCl b TiCl3 c MnO2 d Fe
16. Calamine contains which of the following compound?
a ZnCO3 b CaCO3
c Na2CO3 d MgCO3
17. Which of the following compound is present in antacid medicine?
a Al(OH)3 b NaOH
c KOH d MgCl2
Look at the following figure and answer question no. 18-19 :
O
H H
18. What is the melting point of the above mentioned compound?
a 0C b 1C
c 4C d 100C
19. In pure state
i. It do not conduct electricity ii. It shows amphoteric behavior iii. It is completely neutral Which one is correct?
a i & ii b i & iii c ii & iii d i, ii & iii
20. For very fine, smooth and narrow yarn which of the following is essential?
a Carding b Combing
c Twisting d Heckling 21. Which supply oxygenated blood?
a Artery and pulmonary artery b Vein and pulmonary vein c Artery and pulmonary vein d Vein and Artery
22. How many layers are there in pericardium wall?
a 2 b 3
c 4 d 5
23. Which one is beneficial for human body?
a HDL b LDL
c TG d Fat
24. What is the amount of hemoglobin in a grown up humans body?
a 10-22 gm/dl b 12-14 gm/dl c 14-16 gm/dl d 16-18 gm/dl
25. Which blood group is called the universal receiver?
a ‘A’ b ‘B’
c ‘AB’ d ‘O’
26. Vitamin B-2 is found in?
a Young shoot of seed b Husked rice
c Kidney d Cod oil 27. Smokers
i. suffer from beriberi
ii. suffer from urinary bladder cancer iii. suffer from lung cancer
Which one of the following is correct?
a i & ii b i & iii c ii & iii d i, ii & iii 28. What is called 5% acetic acid?
a Ascorbic acid b Lime
c Vinegar d Milk of potash 29. Which one is used to express food calorie?
a Kilojoule b Kilocalorie c Kilowatt d Kilo ampere
30. What is the number of platelets in a nature human body in per cubic ml blood?
a Approx. 1.5 lac b Approx. 2.5 lac c Approx. 3.5 lac d Approx. 4.5 lac
