Leads is used for making bullets and lead shots because of its?
A. resistance to corrosion B. low melting point C. high density D. flexibility Correct Answer: Option C – high density
Which of the following compounds of trioxonitrate (V) will decomposes to give dinitrogen (i) oxide and water when heated?
A. NaNO3 B. Zn(NO3)2 C. Cu(NO3)2 D. NH4NO3 Correct Answer: Option D – NH4NO3
The substance that is used in the steel industry for the removal of carbon; sulphur and phosphorus impurities from pig iron is?
A. oxygen B. chlorine C. nitrogen D. hydrogen Correct Answer: Option A – oxygen
The rate of a reaction usually decrease in the concentration of reactants because?
A. kinetic energy decrease B. temperature increase C. speed increases D. reactants collision decrease Correct Answer: Option D – reactants collision decrease
A catalyst speeds up the rate of chemical reaction by?
A. taking part in the reaction B. increasing the activation energy of the reaction C. lowering the activation energy of the reaction D. increasing the heat content Correct Answer: Option C – lowering the activation energy of the...Products
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