NEST Chemistry Mock Test 14

Download PDF of This Page (Size: 183K)

Q-1. If 0.1 M of a weak acid is taken, and its percentage of degree of ionization is 1.34%, then calculate its ionization constant.

(a)

(b)

(c)

(d) None of these

Q-2 If a substance with half-life 3 days is taken at other place in 12 days. What amout of substance is left now?

(a)

(b)

(c)

(d)

Q-3. To prepare a solution of concentration of 0.03 g/ml of what amount of should be added in 60 ml of solution?

(a) 1.8

(b) 0.8

(c) 0.18

(d) None of these

Q-4. How will you separate a solution (miscible) of benzene + ?

(a) Sublimation

(b) Filtration

(c) Distillation

(d) Crystallization

Q-5. When alcohol reacts with concentrated intermediate compound formed is

(a) Carbonium ion

(b) Alkxy ion

(c) Alkyl hydrogen sulphate

(d) None of these

Q-6. According to law of mass action, rate of a chemical reaction is proportional to

(a) Concentration of reactants

(b) Molar concentration of reactants

(c) Concentration of products

(d) Moral concentration of products.

Q-7. In Hall’s process, the main reagent is mixed with

(a)

(b)

(c)

(d) None of these

Q-8. In electrolysis of dilute what is liberated at anode?

(a)

(b)

(c)

(d)

Q-9. Vinegar obtained from sugarcane has

(a)

(b)

(c)

(d)

Q-10. What is the packet of energy called?

(a) Electron

(b) Photon

(c) Positron

(d) Proton

Q-11. When an acid cell is charged, then

(a) Voltage of cell increases

(b) Electrolyte of cell dilutes

(c) Resistance of cell increases

(d) None of these.

Q-12. is prepared by the method

(a) Down’s cell

(b) Costner cell

(c) Solvay process

(d) Costner Keller cell.

Q-13. When toluene is treated with what is produced?

(a) Benzene

(b) Chlorobenzene

(c) Benzaldedehyde

(d) Benzoic acid

Q-14. Solder is an alloy of

(a)

(b)

(c)

(d)

Q-15. Carbolic acid is

(a)

(b)

(c)

(d)

Q-16. Alcohols are isomeric with

(a) Acids

(b) Ethers

(c) Esters

(d) Aldehyde

Q-17. The group linkage present in fats is

(a) Peptide linkage

(b) Ester linkage

(c) Glycoside linkage

(d) None of these

Q-18. The group present in waxes are

(a) Acid group

(b) Ester group

(c) Alcohol group

(d) Ether group

Q-19. Which of the following is liquid at room temperature?

(a)

(b)

(c)

(d)

Q-20. Which gas is liberated when is hydrolyzed?

(a)

(b)

(c)

(d)

Q-21. The only alcohol that can be prepared by the indirect hydration of alkenes is

(a) Ethyl alcohol

(b) Propel alcohol

(c) Isobutyl alcohol

(d) Methyl alcohol

Q-22. Baking powder is

(a)

(b)

(c)

(d)

Q-23. When washing soda is soda is heated

(a) is released

(b) is released

(c) is released

(d) Water vapor is released.

Q-24. Which of the following attacks glass?

(a) HCl

(b) HF

(c) Hl

(d) HBr.

Q-25. A colorless gas with the smell of rotten fish is

(a)

(b)

(c)

(d) None of these

Q-26. Salicylic acid is prepared from phenol by

(a) Reimer Thiemann reaction

(b) Kolbe’s reaction

(c) Kolbe-electrolysis reaction

(d) None of these

Q-27. Heating of are in presence of air to remove sulphiric impurities is called

(a) Calcinations

(b) Roasting

(c) Smelting

(d) None of these

Q-28. Reaction in a line goes to completion because

(a) to give

(b) Backward reaction is very slow

(c) formed escapes out

(d) None of these

Q-29. If 30 ml of and 20 ml of reacts to from water, what is left at the end of the reaction?

(a)

(b)

(c)

(d) 5 ml of

Q-30. Which of the following is a highly corrosive salt?

(a)

(b)

(c)

(d)

Q-31. 0.5 M of is diluted from 1 liter to 10 liter, normality of resulting solution is

(a) 1 N

(b) 0.1 N

(c) 10 N

(d) 11 N

Q-32. Formula for tear gas is

(a)

(b)

(c)

(d) None of these

Q-33. Which of the following is potassiumeferric-yanide?

(a)

(b)

(c)

(d)

Q-34. Sodium nitroprusside when added to an alkaline solution of sulphide ions produce a

(a) Red coloration

(b) Blue coloration

(c)Purple coloration

(d) Brown coloration

Q-35. The product obtained on reaction of with hydrogen over palladium carbon is

(a)

(b)

(c)

(d)

Q-36. A solution has pH=5, it is diluted 100 times, then it will become

(a) Neutral

(b) Basic

(c) Unaffected

(d) More-acidic.

Q-37. Ketones react with Mg-Hg over water gives

(a) Pinacolone

(b) Pinacols

(c) Alcohols

(d) None of these.

Q-38. X is heated with soda lime and gives ethane. X is

(a) Ethanoic acid

(b) Methanoic acid

(c) Propionic acid

(d) Either (a) or (c).

Q-39. The product obtained on fusion of and is

(a)

(b)

(c)

(d)

Q-40. A 5 moral solution of is diluted from 1 liter to 10 liters. What is the normality of the solution?

(a) 0.25 N

(b) 1 N

(c) 2 N

(d) 7 N