Flash Card
The change of Fe in ferrous ion is ............. .
Sodium carbonate (Na2CO3) solution is added to the calcium chloride (CaCl2) solution. Which of the following is CORRECT observation?
What happens when phthalic anhydride taken in an evaporating dish is slowly heated on at low flame?
During the corrosion of iron, in the anode region, ............. .
Rate of a chemicla reaction........... .
.............. is a chemical change.
When two or more reactants combine in a reaction to form a single product, it is called a ........... reaction.
A student takes 5 g of sodium hydroxide. He adds it to 100 mL of water taken in a plastic bottle and shakes the content well. Which of the following observation is CORRECT?
When aluminium metal reacts with dillute hydrochloric acid, .............. gas is liberated.
Nascent oxygen is represented as ........... .
............. is used as catalyst in the conversion of vegetable oil to vanaspathi ghee
When ........... is passed through fresh lime water, it turns milky.
Which among the following is a double displacement reaction?
If the product formed is an insoluble solid, then instead of (s), it can be indicated by the symbol .......... in the chemical equation.
Food stuff cooked in oil or ghee will become rancid easily if .............. .
Which of the following is NOT formed when Cu reacts with concentrated nitric acid?
In the chemical equation, the ............ written on the left hand side.
The conversion of ferrous sulphate into ferric sulphate is ............ reaaction.
Which of the following is used as a catalyst to increase the rate of decomposition of KClO3 to liberate O2 gas?
The chemical formula of the rust is ............. .
On mixing aqueous solutions of silver nitrate and sodium chloride, a white precipitate is obtained. This reaction can be categorized as ........... reaction.
Why is the reductant in the following reaction Mno2 + 4HCI → MnCl2 + 2H2O + Cl2
What happens when a piece of zinc metal is added to copper sulphate solution?
The process due to which reddish colored coating is formed on iron is called as................ .
The chemical reaction in which two or more products are formed from a single reactant is called .......... reaction.
Identify INCORRECT statement regarding the conventions followed while writing a chemical equation.
Which of the following is formed when ethyl alcohol is treated with acidic potassium dichromate?
A student holds a magnesium (Mg) strip in pair of tongs and ignites the strip. On burning of magnesium metal in the presence of air, a while powder of ............ is formed.
Consider the formation of carbon dioxide gas by combustion of coal in air. Which of the following is CORRECT statement?
When the positive charge on an ion increases and the negative charge on them decreases it is called as ............. .
The reaction of iron nail with copper sulphate solution is .............. reaction.
Rusting of an iron nail is a ............ reaction.
Which of the following statements is INCORRECT?
Which is the CORRECT statement?
Which of the following is a physical change?
