Class - X
Subject: Chemistry (Theoretical)
Time : 35 Minutes Marks. 35
1. Sugar and water makes -
a) Homogeneous mixture
b) Heterogeneous mixture
c) Compound
d) None of the above.
2. What is rust -
a) A kind of dirt
b) A compound of Fe, O2 and H2O
c) A compound of Fe and O2.
d) Homogeneous mixture
3. Which one is called formula mass?
a) Molecular mass b) molecular weight
c) Atomic mass d) All of the above
4. Which metal is deposited in Landolt experiment?
a) Cu b) Ag c) Zn d) H2SO4
5. Who is founder of Law of Reciprocal proportion
a) Rickter b) Gay - Lussac
c) John Dalton d) Proust.
6. Which of the following is diatomic?
a) Sulphur b) Phosphorus
c) Chlorine d) Iron
7. What is the Molecular mass of Glucose?
a) 280 b) 90
c) 140 d) 180
8. What is the ratio of the mass of oxygen and hydrogen in water?
a) 1:2 b) 2:1 c) 1:8 d) 8:1
9. How many atoms in 2 C12 H22 O11?
a) 2 b) 44 c) 88 d) 90
10. What is the mass of a molecule of water?
a) 3.99 x 10-25g b) 1.99x 10-24g
c) 2.99x10-23 g d) 1.673 x 10-26 g
11. What is meant by standard temperature and pressure?
a) 00C and 1 atm pressure.
b) 250 C and 1 atm pressure
c) 00 C and 1 cm of Hg pressure.
d) 2500 C and 1 cm of Hg pressure.
12. How many times the molecular mass of a gas its vapour density?
a) Twice b) Thirce
c) one fourth d) one fifth.
13. What is the volume of 44 g. carbon di oxide at NTP?
a) 224 L b) 2240 L
c) 22.4 L d) 22400 L
14. 1 mole Nitrogen is -
a) 32 g b) 28 g c) 14 g d) 18 g
15. Which compound has vapour density '23' ?
a) N2 O5 b) SO2
c) CO2 d) NO2
16. What is the number of carbon atoms in 1 gm. Diamond?
a) 5.02 x 1022 b) 6.023x 1023
c) 12 d) 5000
17. In how many moles water the numbers of molecules present are 12.046x1023?
a) 
Mole b) 1 mole
Mole b) 1 mole c) 2 moles d) 12 moles
18. What is the molecular formula of rust?
a) Fe3. n H2O b) Fe2 O3. n H2O
c) Fe2 O4. n H2O d) Fe3 O2. n H2O.
19. What is the molecular formula of cryolite?
a) Na3 AlF6 b) Na3 AlF
c) Na2 AlF6 d) Na2 Al3 F
20. In which symbol of the elements 'T' is absent?
a) Thallium b) Throrium
c) Thulium d) Tin
21. Which compound has different emperical and molecular formula?
a) H2O b) NH3 c) CH4 d) H2O2 22. What is the amount of carbon in glucose?
a) 16% b) 40% c) 30% d) 60%
23. What is the molecular mass of perchloric acid?
a) 100.7 b) 100.5 c) 160.7 d) 200.5
24. What is the valency of Cr in dichromate radical?
a) 2 b) 3 c) 4 d) 6
25. What is the active valency of iron in [Fe(CNS) Cl2]?
a) 0 b) 1 c) 2 d) 3
26. What is the symbol of the element which has atomic number '21'?
a) Sc b) Cr c) Ti d) Th.
27. The position of silicon in periodic table is-
a) gr IA b) gr IIA
c) gr IV A d) gr VI A
28. What is the electronic configuration of caesium?
a) 2, 8,18, 8, 1 b) 2,8,18,18, 8, 1
c) 2, 8, 32, 8, 5 d) 2, 8, 8, 32, 5
29. Which one is inert gas -
a) Na b) Cu c) Ar d) Al
30. What is the optimum temperature of the reaction of SO2 and O2 in Industry?
a) 200-2500C b) 400-5000C
c) 500-6000C d) 300-3500C.
31. Which one is used as a promoter in ammonia synthesis?
a) Fe b) KOH c) Al2O3 d) b+c
32. Which is polar compound?
a) Benzene b) Ether
c) Petrol d) Alcohol.
33. I Farad is --
a) 96500 Coulomb b) 9600 Coulomb
c) 9651 Coulomb d) C 65000 Coulomb
34. Which one is non-electrolyte?
a) Sugar b) Salt
c) Cu SO4 d) Sulphuric acid
35. Cation is attracted by -
a) Solution b) Voltmeter
c) Anode d) CAthode.
Posts
No comments:
Post a Comment