Chemistry
1. The organic compund used for the preparation of plastics is : a) CH3OH b) HCOOH c) H-CHO d) CH3COCH3
2. Which one of the folloeing solutions with same concentration will have lowest pH value?
a) NaOH b) CH3COOH c) NH4OH d) dil H2SO4.
3. In the titration of NH4OH with hydrochloric acid, the suitable indicator is ::
a) Methyl orang b) Litmus solution c) Phenolphthalein d) None of these.
4. Water containing Mg(HCO3)2 and Ca(NO3)2 is :
a) Permanent hard b) temporary hard c) both a and b c) soft only
5. The most commonly used vulcunizing agent is :::
a) Graphit b) carbon black c) sand d) sulphur.
6. Which varity of coal contains maximum persentage of carbon::::
a) peat b) lignite c) anthracite d) bituminous
7. Acetylene is detected by ::
a) Ammoniacal Cu2Cl2 solution b) Br2-water c) cone. H2SO4acid d) all of them
8. Which of the following will influence a chemical syswtem according to Le Chatelier's principle::
a) concenration only b) temperature only c) pressure only d) all of them.
9. Which of the following gases occupies highest volume at STP??
a) 2gm H2 b) 4gm O2 c) 14gm N2 d) 22gm CO2
10. In the reaction 2SO2 + O2 <=>2SO3 + heat, the production of SO3 will increase if ::
a) Temperature is increased b) Temperature is decreased c) Temperature remains unchanged d) pressure is decreased
1. The organic compund used for the preparation of plastics is : a) CH3OH b) HCOOH c) H-CHO d) CH3COCH3
2. Which one of the folloeing solutions with same concentration will have lowest pH value?
a) NaOH b) CH3COOH c) NH4OH d) dil H2SO4.
3. In the titration of NH4OH with hydrochloric acid, the suitable indicator is ::
a) Methyl orang b) Litmus solution c) Phenolphthalein d) None of these.
4. Water containing Mg(HCO3)2 and Ca(NO3)2 is :
a) Permanent hard b) temporary hard c) both a and b c) soft only
5. The most commonly used vulcunizing agent is :::
a) Graphit b) carbon black c) sand d) sulphur.
6. Which varity of coal contains maximum persentage of carbon::::
a) peat b) lignite c) anthracite d) bituminous
7. Acetylene is detected by ::
a) Ammoniacal Cu2Cl2 solution b) Br2-water c) cone. H2SO4acid d) all of them
8. Which of the following will influence a chemical syswtem according to Le Chatelier's principle::
a) concenration only b) temperature only c) pressure only d) all of them.
9. Which of the following gases occupies highest volume at STP??
a) 2gm H2 b) 4gm O2 c) 14gm N2 d) 22gm CO2
10. In the reaction 2SO2 + O2 <=>2SO3 + heat, the production of SO3 will increase if ::
a) Temperature is increased b) Temperature is decreased c) Temperature remains unchanged d) pressure is decreased
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