Recent questions in Chemistry

Breaking of lead bromide into lead and bromine is an example of __________.

asked Aug 23, 2018 by meena.p

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Heat is evolved during:

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Oxidation is a process which involves:

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In the reaction : $2H_2S+SO_2\to 2H_2O+ 3S,$ choose the statement which is false ?

asked Aug 23, 2018 by meena.p

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Chemical changes are __________.

asked Aug 21, 2018 by meena.p

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Which of the following statements is not correct?

asked Aug 21, 2018 by meena.p

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Which of the following gives the correct increasing order of acidic strength?

asked Aug 21, 2018 by meena.p

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The symbol (aq) means:

asked Aug 21, 2018 by meena.p

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Ions that do not participate in a chemical reaction are ____ ions

asked Aug 21, 2018 by meena.p

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The activity series of metals is used to determine whether or not a ______ reaction has occurred.

asked Aug 21, 2018 by meena.p

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A reaction that has oxygen as a reactant and usually has carbon dioxide and water as products is a _____ reaction.

asked Aug 21, 2018 by meena.p

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According to the law of conservation of mass, the total mass of the reacting substances is

asked Aug 21, 2018 by meena.p

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Iron + Sulfur $\to$Iron sulfide $[Fe + S \to FeS]$ is an example of

asked Aug 21, 2018 by meena.p

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Acidic hazardous wastes are neutralised with slaked lime, caustic soda or sodium hydroxide.

asked Aug 21, 2018 by meena.p

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Common reagents for neutralising acid wastes are ____

asked Aug 21, 2018 by meena.p

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Glacial acetic acid , pure $HC_2H_2O_2(FW=60.0)$ has concentration of $17.54\;M$ . If $85.5\;mL$ of glacial acetic are diluted to 250 mL. What is the acetic acid concentration ?

asked Aug 16, 2018 by meena.p

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What happens when zinc reacts with sodium hydroxide?

asked Aug 16, 2018 by meena.p

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If $0.050\;mL$ of $0.6\;M\;HCl$ is added to 400 mL of $10^{-5}\;M\;HCl$ what is the resulting pH?

asked Aug 16, 2018 by meena.p

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What is the color of anhydrous copper sulphate?

asked Aug 16, 2018 by meena.p

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Phenolphthalein exhibits which color with an acid?

asked Aug 16, 2018 by meena.p

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What happens when carbon dioxide gas reacts with sodium hydroxide?

asked Aug 16, 2018 by meena.p

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How many ml of barium hydroxide is required to neutralize 55 ml of Nitric acid The concentration of the acid is 0.2585 moles/l and the concentration of the base is 0.047 moles / litre.

asked Aug 16, 2018 by meena.p

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What are the products of the following reaction? $H_2SO_4+NaOH$

asked Aug 16, 2018 by meena.p

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What volume of $0.075\; M \;HCl$ is required to neutralize $100\; ml$ of $0.01\; M\; Ca(OH)_2$ solution?

asked Aug 16, 2018 by meena.p

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What happens when sodium sulphate solution is mixed with the solution of barium chloride?

asked Aug 16, 2018 by meena.p

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The drying of milk of lime (white washing) is due to the action of ___________.

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Which substance completely dissociates in water?

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Neutral solutions have a pH of:

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Which of the following combination reactions contains at least one compound in its reactants?

asked Aug 16, 2018 by meena.p

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The symbol for calcium is Ca, the symbol for sulfur is S, and the symbol for calcium sulfide CaS. Which of the following best describes this chemical reaction: $Ca (s) + S (s) \longrightarrow CaS (s)$?

asked Aug 16, 2018 by meena.p

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A displacement reaction will occur when...

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What is made when magnesium reacts with hydrochloric acid?

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If $NaOH_{(aq)}$ reacts with $HCl_{(aq)},$ reaction can be known as

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Most metals react with acids to form

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Which of the following does not corrode when exposed to the atmosphere-

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In the equation, $NaOH + HNO_3 \longrightarrow NaNO_3 + H_2O$ nitric acid is acting as

asked Aug 13, 2018 by meena.p

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The reaction $2KClO_{3(s)} \longrightarrow 2KCl_{(s)}+3O_{2(g)}$ is a

asked Aug 13, 2018 by meena.p

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Which of the following type of chemical reactions results in a single product.

asked Aug 13, 2018 by meena.p

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What happens when Copper metal is dipped in the solution of zinc sulphate?

asked Aug 13, 2018 by meena.p

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Which metal is displaced when lead is put in the solution of copper chloride?

asked Aug 13, 2018 by meena.p

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What happens when carbon dioxide is passed in lime water?

asked Aug 13, 2018 by meena.p

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What happens when silver chloride is put under sunlight?

asked Aug 13, 2018 by meena.p

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In which of the following category will you put the reaction of heating of ferrous sulphate?

asked Aug 13, 2018 by meena.p

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The reaction in which two compound exchange their ions to form two new compounds is called

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The reaction $2Na+Cl_2 \to 2NaCl$ is an example of

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A mixture contains 9 gram each of $H_2O$ and $NaCl,$ what is the mole fraction of NaCl?

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A solution has $25\%$ w/w solution of Sodium Chloride in 10 grams of water what is the mole fraction of Sodium Chloride?

asked Aug 13, 2018 by meena.p

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The mass fraction of KCl in its aqueous solution is 0.051. What is the mole fraction of sodium chloride in the solution?

asked Aug 13, 2018 by meena.p

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The mole fraction of NaCl in water is 0.22. What is its mass percent?

asked Aug 13, 2018 by meena.p

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Which of the following choices is characteristic of molality?

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