Advertisements
Advertisements
Question
Find the odd man out:
Turmeric, Methyl Orange, Rose petals, Beetroot.
Advertisements
Solution
Methyl orange
Turmeric, rose petals and beetroot are natural indicators, while methyl orange is a synthetic indicator.
APPEARS IN
RELATED QUESTIONS
Balance the chemical equation.
\[\ce{HNO3 +Ca(OH)2 -> Ca(NO3)2 + H2O}\]
Correct and balance the following equation:
\[\ce{N + H -> NH3}\]
Chemical equations are balanced to satisfy the law of ______.
Balance the following chemical equation:
\[\ce{NH3 -> N2 + H2}\]
Write any two observations in an activity which may suggest that a chemical reaction has taken place. Give an example in support of your answer.
Give one example of an endothermic reaction.
The chemical reaction between two substances is characterised by a change in colour from orange to green. These two substances are most likely to be ______.
Which of the following is not an endothermic reaction?
Balance the following chemical equation:
\[\ce{FeSO4 ->[Heat] Fe2O3 + SO2 + SO3}\]
Write word equation for the following skeletal equation:
\[\ce{Ca + O2 → CaO}\]
Write symbolic representation for the following word equation and balance them :
Iron + Sulphur → Iron sulphide.
Balance the following equation .
N2 + O2 → NO
Balance the following equation. Also name the product formed.
`"NaNO"_3 → "NaNO"_2 + "O"_2` Name of product (s)
Write your observation and name the product when ron nails are added to an aqueous solution of copper sulphate.
Dry raisins were soaked in water for 2 hours, to determine the percentage of water absorbed by raisins. Before final weighing of swollen raisins, the extra water left on the surface of soaked raisins was removed by:
Balance the equation stepwise.
NaOH(aq) + H2SO4(aq) → Na2SO4(aq) + H2O(l)
What is the limitation of the reaction given in question 2?
Write the chemical equation for the following word equation and balance them.
Calcium oxide + Carbon dioxide → Calcium carbonate
Balance the following equation:
MnO2 + HCl → MnCl2 + H2O + Cl2
Balance the following equation:
NaHCO3 → Na2CO3 + H2O + CO2
Write the balanced chemical equation of the following reaction.
barium chloride + sulphuric acid → barium sulphate + hydrochloric acid
Write the balanced chemical equation of the following reaction.
aluminium carbide + water → aluminium hydroxide + methane
Write the balanced chemical equation of the following reaction.
aluminium sulphate + sodium hydroxide → sodium sulphate + sodium meta aluminate + water.
Write the balanced chemical equation of the following reaction.
aluminium + sodium hydroxide + water → sodium meta aluminate + hydrogen
\[\ce{MnO2 + 4HCl -> MnCl2 + 2H2O + Cl2}\]
0.02 moles of pure MnO2 is heated strongly with conc. HCl. Calculate the volume of chlorine gas formed at S.T.P.
Considering the relationship in the first pair, complete the second paie :
AgCI : White :: CuI2 : ___________
1 g of copper powder was taken in a China dish and heated. What change takes place on heating? When hydrogen gas is passed over this heated substance, a visible change is seen in it. Give the chemical equations of reactions, the name and the color of the products formed in each case.
Write the name and molecular formula of a carbon compound having its name suffixed with "-ol" and having two carbon atoms in its molecule. With the help of a chemical equation indicate what happens when this compound is heated with excess conc. H2SO4.
A student mixes sodium sulphate powder in barium chloride powder. What change would the student observe on mixing the two powders? Justify your answer and explain how he can obtain the desired change.
Write word equation for the following molecular equation:
CaO + H20 → Ca (OH)2 + Δ
Word equation:
State why [+ Δ ] is not written in the reaction, if ZnO reacts with H2O.
Write word equation for the following molecular equation:
\[\ce{CuSO4 + 2NaOH -> Na2SO4 + Cu(OH)2↓}\]
Word equation:
State the colour of the products.
In certain reaction a change of state is observed i.e. solid to liquid, liquid to gas etc. – State the change of state of the products – to give the respective reactant.
\[\ce{C +2S -> CS2}\]
Balance the following simple equation:
K + H2O → KOH + H2
Write a balanced equation for the following word equation:
Potassium nitrate → Potassium nitrite + Oxygen
Fill in the blank with the correct word from the options given below:
A chemical equation is a shorthand form for a _______ change.
Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.
3CuO + NH3 → 3Cu + 3H2O + N2
Which of the following statements about the given reaction are correct?
`3"Fe"("s") + 4"H"_2"O"("g") -> "Fe"_3"O"_4("s") + 4"H"_2("g")`
- Iron metal is getting oxidised
- Water is getting reduced
- Water is acting as reducing agent
- Water is acting as oxidising agent

Which of the following is the correct observation of the reaction shown in the above set up?
Why should a magnesium ribbon be cleaned before burning in air?
