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Chemistry
Chemical reactions and equations
Answer the following questions on this basis.
Which is correct matching of salt X?

A.\[NiB{r_2}\]
B.\[CuB{r_2}\]
C.\[Cr{\left( {N{O_3}} \right)_2}\]
D.\[Cu{\left( {N{O_3}} \right)_2}\]
Chemistry
Chemical reactions and equations
When we mix the solutions of lead (II) nitrate and potassium iodide.
(i) What is the colour of the precipitate formed? Can you name the compound precipitated?
(ii) Write the balanced chemical equation for this reaction.
(iii) Is this also a double displacement reaction?
Chemistry
Chemical reactions and equations
Identify the compound \[X\] on the basis of the reaction given below. Also write the name and chemical formula of \[A,B,C\] .
\[X + Zn = A + {H_2};X + HCl = B + {H_2}O;X + C{H_3}COOH = C + {H_2}O\]
Chemistry
Chemical reactions and equations
The chemical reaction in which the products formed react together to form the original reactants is known as___________.
A) Irreversible reaction
B) Reversible reaction
C) Catalytic reaction
D) Neutralization reaction
Chemistry
Chemical reactions and equations
What is the gas liberated when an alkaline formaldehyde solution is reacted with hydrogen peroxide in the presence of pyrogallol?
A.\[{{H}_{2}}\]
B.\[{{O}_{2}}\]
C.\[C{{H}_{4}}\]
D.\[C{{O}_{2}}\]
Chemistry
Chemical reactions and equations
How much heat is produced when $ 2.63gm $ of phosphorus and $ 40gm $ of bromine is allowed to react according to the following equation?
 $ {{\text{P}}_{\text{4}}}\left( {\text{s}} \right){{\; + 6B}}{{\text{r}}_{\text{2}}}\left( {\text{l}} \right) \to 4{\text{PB}}{{\text{r}}_{\text{3}}}\left( {\text{g}} \right),{{\Delta H}} = - 486kJ $
A) $ - 10.30kJ $
B) $ - 20.6kJ $
C) $ - 40.12kJ $
D) $ - 5.63kJ $

Chemistry
Chemical reactions and equations
What happens when table salt $(NaCl)$ is added to water?
Chemistry
Chemical reactions and equations
Which of the following reactions is not feasible?
A) $ PhS{O_3}H + NaHC{O_3} \to $
B) $ Ph - OH + NaN{H_2} \to $
C) $ C{H_3} - N{H_2} + NaOH \to $
D) $ Ph - C = CH + NaH \to $

Chemistry
Chemical reactions and equations
Which of the following reactions are possible?
(i) $ Mg + CuS{O_4} \to MgS{O_4} + Cu $
(ii) $ Ca + MgS{O_4} \to CaS{O_4} + Mg $
(iii) $ Cu + ZnS{O_4} \to CuS{O_4} + Zn $
(iv) $ Fe + MgS{O_4} \to FeS{O_4} + Mg $
a) $ iii $ and $ iv $ only
b) $ i $ and $ iv $ only
c) $ ii $ and $ iii $ only
d) $ i $ and $ ii $ only

Chemistry
Chemical reactions and equations
How can one make an equation more informative?

Chemistry
Chemical reactions and equations
Define substitution reaction? Why do arenes undergo substitution reactions even though they contain double bonds?

Chemistry
Chemical reactions and equations
What type of chemical reaction does the reaction belong to? A piece of sodium metal is added to absolute ethanol to form sodium ethoxide and hydrogen gas.
A) Precipitation Reactions
B) Neutralization Reactions
C) Decomposition Reactions
D) Displacement Reaction

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