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Chemistry Questions and Answers
Q1. __________ element has two orbits that are completely filled.
[A] Kr
[B] Ne
[C] He
[D] Ar
Q2. Is C2 Paramagnetic or Diamagnetic?
[A] Ferromagnetic
[B] Paramagnetic
[C] Diamagnetic
[D] Can’t be determined
Q3. What is the oxidation number of sulfur in H2S?
[A] 1
[B] 2
[C] -2
[D] -1
Q4. What is the structure of IF7?
[A] Pentagonal bipyramid
[B] Square pyramid
[C] tetrahedral
[D] Pentagonal bipyramid
Q5. __________ is not acidic.
[A] CCl4
[B] PCl4
[C] PCl3
[D] SbCl4
Q6. A mixture of sand and naphthalene can be separated by
[A] Chromatography
[B] Fractional distillation
[C] Sublimation
[D] Any of them
Q7. Permanent Hardness of water can be removed by adding
[A] Potassium permanganate
[B] Bleaching powder
[C] Chlorine
[D] Wasshing soda
Q8. What is the third most common gas found in the air we breathe ?
[A] Argon
[B] Carbondioxide
[C] Hydrogen
[D] Neon
Q9. How many molecules are present in one mole of water?
[A] 7.02 x 1023 molecules
[B] 6.02 x 1026 molecules
[C] 6.02 x 1023 molecules
[D] 8.02 x 1022 molecules
Q10. Which of the following is NOT a property of bases?
[A] They turn red litmus blue
[B] They turn blue litmus red
[C] They have bitter taste
[D] They react with acids and neutralise them
