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1411. The rate of chemical reaction does not depend upon :
A. Concentration
B. Catalyst
C. Temperature
D. Pressure
Explanation:
1412. Which of the following polymers is widely used for making bullet proof material ?
A. Polyethylene
B. Polyamides
C. Polyvinyl chloride
D. Polycarbonates
Explanation:
1413. To achieve high value of rocket velocity, one must have
A. high exhaust velocity and low loss of mass during propulsion
B. high exhaust velocity and higher loss of mass during propulsion
C. low exhaust velocity and higher loss of mass during propulsion
D. None of these
Explanation:
1414. The most important ore of aluminium is :
A. bauxite
B. calamine
C. calcite
D. galena
Explanation:
1415. Kinetic energy depends :
A. on the mass of the moving body
B. the velocity or speed of the moving body
C. the pressure of the moving body
D. both mass and velocity of the moving body
Explanation:
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