**LEVEL – I **

1. 22.7 ml of N/10 Na_{2}CO_{3} solution neutralises 10.2 ml of a dilute H_{2}SO_{4} . Then the volume of water that must be added to 400 ml of same H_{2}SO_{4} to make it exactly N/10 is

(A) 245 ml

(B) 484.6 ml

(C) 480 ml

(D) 490.2 ml

2. The sulphate of a metal M contains 20% of M. This sulphate is isomorphous with ZnSO_{4}.7H_{2}O. The atomic weight of M is

(A) 12

(B) 24

(C) 36

(D) 48

3. 1.12 ml of a gas is produced at STP by the action of 41.2 mg of alcohol , ROH with methyl magnesium iodide. The molecular mass of alcohol is

(A) 16.0

(B) 41.2

(C) 84.2

(D) 156.0

4. Rearrange the following (I to IV) in the order of increasing maasses and choose the correct answer from (A), (B), (C) and (D) (Atomic mass of N = 14 , O = 16 , Cu = 63 ).

(I) 1 molecule of oxygen

(II) 1 atom of nitrogen

(III) 1 × 10^{–10} gm molecular weight of oxygen

(IV) 1 × 10^{–10} gm atomic weight of copper

(A) (II) < (I) < (III) < (IV)

(B) (IV) < (III) < (II) < (I)

(C) (II) < (III) < (I) < (IV)

(D) (III) < (IV) < (I) < (II)

5. One mole of calcium phosphide on reaction with excess of water gives

(A) One mole of phosphine

(B) Two moles of phosphoric acid

(C) Two moles of phosphine

(D) One mole of phosphorus pentaoxide

6. An aqueous solution of 6.3 gm oxalic acid dihydrate is made upto 250 ml. The volume of 0.1 N NaOH required to completely neutralise 10 ml of this solution is

(A) 40 ml

(B) 20 ml

(C) 10 ml

(D) 4 ml

7. If 0.5 mol of BaCl_{2} is mixed with 0.2 mol of Na_{3}PO_{4} , the maximum number of moles of Ba_{3}(PO_{4})_{2}that can be formed is

(A) 0.7

(B) 0.5

(C) 0.30

(D) 0.10

8. 0.5 mol of H2SO4 is mixed with 0.2 mole of Ca(OH)_{2} . The maximum number of mole of CaSO_{4}formed is

(A) 5

(B) 0.5

(C) 0.4

(D) 1.5

9. The hydrated salt Na_{2}SO_{4}.xH_{2}O undergoes 55% loss in weight on heating and becomes anhydrous. The value of x will be

(A) 5

(B) 3

(C) 7

(D) 10

10. The percent loss in weight after heating a pure sample of KClO_{3} (molecular weight = 122.5) will be

(A) 12.25

(B) 24.50

(C) 39.18

(D) 49.0

__ANSWER:__

**1. (D) 2. (C) 3. (C) 4. (A) 5. (C) 6. (A) 7. (D) 8. (A) 9. (D) 10.(D)**