topic: Chemical Arithmatic

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Q:

In standardization of Na2S2O3 using K2Cr2O7 by iodometry, the equivalent weight of K2Cr2O7 is

(a) :  MW / 2
(b) :  MW / 3
(c) :  MW / 6
(d) :  MW / 1
Answer:  MW / 6
Explanation:  
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Q:

The mass of 112 cm3 of CH4 gas at STP is

(a) :  0.16 g
(b) :  0.8 g
(c) :   0.08 g
(d) :  1.6 g
Answer:   0.08 g
Explanation:  
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Q:

(a) :  1, 1, 2, 2, 1
(b) :  2, 2, 1, 1, 1
(c) :   2, 1, 1, 2, 1
(d) :  2, 2, 1, 2, 1
Answer:  2, 2, 1, 2, 1
Explanation:  
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Q:

A compound possesses 8% sulphur by mass. The least molecular mass is

(a) :  200
(b) :   400
(c) :   155
(d) :  355
Answer:   400
Explanation:  
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Q:

The molar heat capacity of water at constant pressure is 75  JK -1 mol -1 . When 1.0 kJ of heat is supplied to 100 g of water which is free to expand, the increases in temperature of water is

(a) :  6.6 K
(b) :   1.2 K
(c) :  2.4 K
(d) :   4.8 K
Answer:  2.4 K
Explanation:  
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