Subject Code : 1 3 7
BAF Shaheen College Dhaka
Practice Preparatory Test Examination-1: 2020 Class: X
(English Version) Subject: Chemistry (MCQ)
Time: 25 Minutes Full Marks: 25
[Darken the circle (O) with black ball point pen from the alternatives]
1. What percentage of gold are there in 22 karate gold?
a 100% b 91.67%
c 87.5% d 12.5%
2. How many number of nitrate ions in the compound Aluminium nitrate?
a 18.069 1024 b 1.8069 1024 c 18.069 10 24 d 1.8069 1026
Read the following stem carefully and answer question 3 & 4 :
C3H7OH + H2SO4(conc)
H2O A A + H2 Ni
(180200)C D
3. What is the percentage composition of carbon in compound A?
a 14.29% b 18.18%
c 81.81% d 85.71%
4. The compound D
i. can be used to prepare organic acid ii. is more reactive than compound A iii. has 10 covalent bond in its molecule Which one is correct?
a i & ii b i & iii c ii & iii d i, ii & iii 5. Which one is extracted by the carbon reduction
process?
a Ca b Zn c Na d Al
6. The pH value of water less than of which value will be threat to living beings?
a 14 b 9.5 c 7.0 d 4.5 7. What do you mean by semi molar?
a 2 molar b 0.5 molar c 0.1 molar d 0.01 molar
8. What is the percentage of aqueous solution of ethanol is called rectified spirit?
a 96% b 69% c 90% d 76%
1
1 16
2 G
3 Z
Part of periodic Table
By using above stem answer the questions no.
9 & 10 :
9. Which compound is formed by ‘Z’ and ‘G’?
a H2O b Na2O c Na2S d H2S 10. The compound formed by ‘G’ and ‘Z’
i. is ionic
ii. is basic in aqueous solution
iii. in which both elements obtain the electronic configuration of Argon
Which one is correct?
a i & ii b i & iii c ii & iii d i, ii & iii 11. Which gas is released as by product during
extraction of copper?
a SO2 b CO c CO2 d SO3
12. In PCl3 active and latent valency of phosphorous is
a 1, 4 b 4, 1 c 3, 2 d 2, 3 13. Mg(NO3)2 xMgO + yNO2 + ZO2
x : y : z = ?
a 1 : 2 : 1 b 2 : 1 : 2 c 1 : 2 : 1
2 d 3 : 2 : 1
Observe the following reaction and answer the question no. 14 & 15 :
H3C CH2 CH = CH2
Br2
Y
14. What type of compound will be produced if the hydrocarbon of the stem is oxidized by kMnO4(aq)?
a Aldehyde b Alkyne c Glycol d Alkane 15. What is the name of ‘Y’?
a 1, 1 dibromo butane b 2, 2 dibromo butane
c 1, 1, 2, 2 tetrabromo butane d 1, 2 dibromo butane
16. What is the correct formula for Sulphur?
a S8 b S4 c S2 d S
17. Which of the followings is a gangue?
a Al2O3 b ZnS
c SiO2 d PbS
18. 5 gm hydrogen and 30 gm nitrogen react with each other. After the reaction which reactant will remain left?
a 0.1667 mole N2 b 0.2382 mol N2 c 1.0714 mole H2 d 3.2142 mol H2
19. Which reacts with diluted acid with explosion?
a Na b Al
c Cl d Mn
20. At 25C temparature out of 1000 CH3COOH molecules how many CH3COOH molecule will be decomposed in water?
a 4 b 6 c 10 d 100
21. Which one is used to remove insoluble pollutant in water?
a Gypsum b Alum dust c Bleach d Caustic Soda 22. What is mole of atoms of 3 gram Carbon?
a 0.25 b 1
c 4 d 36
23. this compound
i. is cyclohexene ii. is aromatic
iii. has molecular formula C6H10
Which one is correct?
a i & ii b i & iii c ii & iii d i, ii & iii 24. What is the formula of chromite?
a FeO.Cr2O3
b Fe2O3.Cr2O3
c CuFeS2
d TiO2
25. Which one is responsible for temporary hardness of water?
a Chloride b Sulphate c bi-sulphate d bi-carbonate
