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Which substance is reduced in the reaction: CuO + H2 → Cu + H2O?
The reaction between iron and copper sulfate solution is an example of:
What are the substances that take part in a chemical reaction called?
Which of the following is a physical change rather than a chemical reaction?
In the reaction $2Mg + O_2 \rightarrow 2MgO$, what is the ratio of Mg to O2 atoms/molecules by stoichiometric coefficients?
Which of the following is a characteristic of a chemical reaction?
What is the product formed when quicklime (CaO) reacts with water?
Which of the following is an irreversible reaction under normal conditions?
What is the precipitate formed when sodium chloride reacts with silver nitrate solution?
Which gas is used for the commercial preparation of Ammonia by Haber's process besides Hydrogen?
What is the sign of ∆H (change in enthalpy) for an endothermic reaction?
Which of the following describes a negative catalyst?
What type of reaction is: $NaCl + AgNO_3 \rightarrow AgCl + NaNO_3$?
Which of the following is necessary for a combustion reaction to occur?
In the reaction $Fe + S \rightarrow FeS$, how many substances are there as products?
What type of reaction is the digestion of food in our body?
Identify the oxidizing agent in: $H_2S + Cl_2 \rightarrow 2HCl + S$.
What is the color of the nitrogen dioxide gas evolved during the thermal decomposition of lead nitrate?
Which of the following is not a factor affecting the rate of reaction?
When a chemical equation is 'balanced', it satisfies the law of: