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1371. The element common to all acids is :
A. carbon
B. hydrogen
C. oxygen
D. sulphur
Explanation:
1372. The charcoal to decolourise raw sugar is :
A. animal charcoal
B. sugar charcoal
C. coconut charcoal
D. wood charcoal
Explanation:
1373. A small weight is put on the pressure cooker. It increases the pressure of the steam because :
A. the weight is proportionate to the steam required
B. area of contact is small
C. the weight stops the steam from escaping
D. of Bernoullis principle
Explanation:
1374. Which of the following statements is/are ture ? 1. Sound is a form of energy 2. Sound stops when vibration of an object stops3. Sound is a transverse wave4. sound travels better in a heavy gas than in a light gas
A. 1 and 2
B. 1, 2 and 3
C. 1, 2 and 4
D. 1 and 3
Explanation:
1375. Gypsum is added to cement clinker to :
A. increase the tensile strength of cement
B. blind the particles of calcium silicate
C. decrease the rate of setting of cement
D. facilitate the formation of colloidal gel
Explanation:
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