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question_answer1)
What is the reaction in which a substance or substances undergo change to produce new substances with new properties called?
A)
A biochemical reaction done
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B)
A nuclear reaction done
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C)
A physical reaction done
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D)
A chemical reaction done
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question_answer2)
Which substances take part in a chemical reaction?
A)
Products done
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B)
Reactants done
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C)
Mixtures done
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D)
Compounds done
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question_answer3)
Which of these substances are formed as a result of a chemical reaction?
A)
Products done
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B)
Reactants done
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C)
Mixtures done
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D)
Compounds done
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question_answer4)
Which of the following conditions is necessary for a chemical reaction?
A)
It must be accompanied with change in temperature and pressure. done
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B)
At least one of the reactants must be in a fixed quantity. done
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C)
It must follow the law of conservation of mass. done
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D)
All of the above done
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question_answer5)
Which of the following is the shorthand representation of a chemical reaction?
A)
A symbol done
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B)
A formula done
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C)
An equation done
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D)
All of the above done
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question_answer6)
'X' is an equation which contains equal number of atoms of each element on both the sides. What is 'X'?
A)
A balanced equation done
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B)
An unbalanced equation done
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C)
A chemical equation done
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D)
All of the above done
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question_answer7)
In the given equation, what does 'X' stand for? \[(2)Al+(X){{H}_{2}}S{{O}_{4}}\to A{{l}_{2}}{{(S{{O}_{4}})}_{3}}+(3){{H}_{2}}\]
A)
2 done
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B)
3 done
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C)
1 done
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D)
5 done
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question_answer8)
Which of the following are correct about a chemical equation?
(i) It saves time and space in writing. |
(ii) It does not indicate the rate of a reaction. |
(iii) It tells the ratio of the masses of the reactants and products. |
A)
Only (i) and (ii) done
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B)
Only (ii) and (iii) done
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C)
Only (i) and (iii) done
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D)
(i), (ii) and (iii) done
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question_answer9)
Which of the given chemical equations is NOT balanced?
A)
\[3Fe+4{{H}_{2}}O\to F{{e}_{3}}{{O}_{4}}+4{{H}_{2}}\] done
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B)
\[KCl{{O}_{3}}\to KCl+{{O}_{2}}\] done
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C)
\[CaC{{O}_{3}}\to CaO+C{{O}_{2}}\] done
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D)
\[Mg+2HCl\,\to \,MgC{{l}_{2}}+{{H}_{2}}\] done
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question_answer10)
Which of the given chemical equations is balanced?
A)
\[{{H}_{2}}{{O}_{2}}\to {{H}_{2}}O+{{O}_{2}}\] done
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B)
\[NaN{{O}_{3}}\to NaN{{O}_{2}}+{{O}_{2}}\] done
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C)
\[CaC{{O}_{3}}\to CaO+C{{O}_{2}}\] done
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D)
\[A{{l}_{2}}C{{O}_{3}}\to A{{l}_{2}}{{O}_{3}}+C{{O}_{2}}\] done
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question_answer11)
In which of the following reactions is a compound broken down into two or more substances?
A)
Displacement reaction done
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B)
Combination reaction done
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C)
Decomposition reaction done
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D)
Double Decomposition reaction done
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question_answer12)
In which reaction is a substance decomposed by using electricity?
A)
Electrolysis done
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B)
Hydrolysis done
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C)
Decomposition done
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D)
Displacement done
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question_answer13)
In which reaction is an atom or a group of atoms present in a molecule displaced by another atom?
A)
Displacement reaction done
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B)
Double decomposition reaction done
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C)
Decomposition reaction done
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D)
Synthesis reaction done
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question_answer14)
In which reaction do two compounds exchange their ions to form two new compounds?
A)
Displacement reaction done
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B)
Double displacement reaction done
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C)
Synthesis reaction done
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D)
Decomposition reaction done
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question_answer15)
In which reaction does a solid get separated from the solution?
A)
Neutralization reaction done
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B)
Precipitation reaction done
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C)
Redox reaction done
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D)
All of the above done
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question_answer16)
Identify the substance which oxidises an element.
A)
A hydrating agent done
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B)
A dehydrating agent done
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C)
An oxidizing agent done
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D)
A reducing agent done
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question_answer17)
Identify the substance which reduces a compound.
A)
A hydrating agent done
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B)
A dehydrating agent done
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C)
An oxidizing agent done
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D)
A reducing agent done
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question_answer18)
In which reaction does the addition and the removal of oxygen takes place simultaneously?
A)
Oxidation reaction done
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B)
Reduction reaction done
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C)
Redox reaction done
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D)
Precipitation reaction done
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question_answer19)
Identify the type of reaction illustrated below. \[{{H}_{2}}+C{{l}_{2}}\to 2HCl\]
A)
Decomposition reaction done
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B)
Combination reaction done
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C)
Double displacement reaction done
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D)
Displacement reaction done
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question_answer20)
A Which of the following is a decomposition reaction?
A)
\[NaOH+HCl\to NaCl+{{H}_{2}}O\] done
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B)
\[N{{H}_{4}}CNO\to {{H}_{2}}N-CO-N{{H}_{2}}\] done
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C)
\[2KCl{{O}_{3}}\to 2KCl+{{O}_{2}}\] done
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D)
\[{{H}_{2}}+{{I}_{2}}\to 2HI\] done
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question_answer21)
Which of the following is a displacement reaction?
A)
\[CaC{{O}_{3}}\to CaO+C{{O}_{2}}\] done
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B)
\[CaO+2HCl\to CaC{{l}_{2}}+{{H}_{2}}O\] done
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C)
\[Fe+CuS{{O}_{4}}\to FeS{{O}_{4}}+Cu\] done
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D)
\[NaOH+HCl\to NaCl+{{H}_{2}}O\] done
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question_answer22)
Which of the following is a redox reaction?
A)
\[CaC{{O}_{3}}\to CaO+C{{O}_{2}}\] done
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B)
\[CuO+{{H}_{2}}\to Cu+{{H}_{2}}O\] done
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C)
\[CaO+2HCl\to CaC{{l}_{2}}+{{H}_{2}}O\] done
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D)
\[NaOH+HCl\to NaCl+{{H}_{2}}O\] done
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question_answer23)
Which of the following statements is correct about the given reaction? \[ZnO+CO\to Zn+C{{O}_{2}}\]
A)
\[ZnO\] is being oxidized. done
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B)
\[CO\] is being reduced. done
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C)
\[C{{O}_{2}}\] is being oxidized. done
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D)
\[ZnO\] is being reduced. done
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question_answer24)
Which of the given reactions is an odd one?
A)
\[\text{Carbon}+\text{Oxygen}\to \text{Carbon dioxide}\] done
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B)
\[\text{Hydrogen}+\text{Chlorine}\to \text{Hydrogen chloride}\] done
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C)
\[\text{Glucose}\to \text{Carbon dioxide}+\text{Water}\] done
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D)
\[\text{Sulphur}+\text{Oxygen}\to \text{Sulphur}\,\text{dioxide}\] done
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question_answer25)
How is the decomposition of silver chloride carried out?
A)
By electricity done
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B)
By sunlight done
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C)
By heat done
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D)
By water done
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question_answer26)
Which of the following statements is correct about the given reaction? \[\text{AB}+\text{C}\to \text{AC}+\text{B}\]
A)
B is more reactive than C. done
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B)
C is more reactive than B. done
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C)
A and B are inert gases. done
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D)
A is more reactive than C. done
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question_answer27)
Which of the following statements is NOT correct about the given reaction? \[{{H}_{2}}S+C{{l}_{2}}\to 2HCl+S\]
A)
\[C{{l}_{2}}\] gets reduced to \[HCl\]. done
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B)
\[{{H}_{2}}S\] gets oxidized to S. done
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C)
\[C{{l}_{2}}\] is the oxidizing agent. done
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D)
\[{{H}_{2}}S\] is the oxidizing agent. done
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question_answer28)
Identify a slow, combustion reaction in which glucose present in the body cells combines with oxygen to produce energy.
A)
Digestion done
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B)
Excretion done
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C)
Respiration done
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D)
Transpiration done
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question_answer29)
Which metal can prevent the corrosion of tin?
A)
\[Zn\] done
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B)
\[Cu\] done
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C)
\[Pb\] done
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D)
\[Ag\] done
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question_answer30)
In the given reaction, what is nA? \[Pb{{(N{{O}_{3}})}_{2}}\to 2Pb+nA+{{O}_{2}}\]
A)
\[4N{{O}_{2}}\] done
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B)
\[2N{{O}_{3}}\] done
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C)
\[2PbN{{O}_{2}}\] done
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D)
\[N{{O}_{2}}\] done
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question_answer31)
Which of the following is a decomposition reaction?
A)
\[NaOH+HCl\to NaCl+{{H}_{2}}O\] done
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B)
\[Zn+2HCl\to ZnC{{l}_{2}}+{{H}_{2}}\] done
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C)
\[2KCl{{O}_{3}}\to 2KCl+3{{O}_{2}}\] done
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D)
\[{{H}_{2}}+{{I}_{2}}\to 2HI\] done
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question_answer32)
Which of the given equations is NOT balanced correctly?
A)
\[2Al+3{{H}_{2}}S{{O}_{4}}\to A{{l}_{2}}{{(S{{O}_{4}})}_{3}}+3{{H}_{2}}\] done
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B)
\[2AlC{{l}_{3}}+3Ca{{(OH)}_{2}}\to 2Al{{(OH)}_{3}}+3CaC{{l}_{2}}\] done
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C)
\[2KCl{{O}_{3}}\to 2KCl+3{{O}_{2}}\] done
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D)
\[Mg+{{H}_{2}}O\to Mg{{(OH)}_{2}}+{{H}_{2}}\] done
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question_answer33)
Which of the following chemical reactions is balanced and also undergoes combustion?
A)
\[{{C}_{3}}{{H}_{8}}+5{{O}_{2}}\to 3C{{O}_{2}}+4{{H}_{2}}O\] done
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B)
\[6C{{O}_{2}}+12{{H}_{2}}O\to {{C}_{6}}{{H}_{12}}{{O}_{6}}+6{{O}_{2}}+6{{H}_{2}}O\] done
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C)
\[{{C}_{3}}{{H}_{6}}+4{{O}_{2}}\to 3C{{O}_{2}}+3{{H}_{2}}O\] done
clear
D)
\[2Al+3{{H}_{2}}S{{O}_{4}}\to A{{l}_{2}}{{(S{{O}_{4}})}_{3}}+3{{H}_{2}}\] done
clear
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question_answer34)
Which of the following is oxidised in the given reaction? \[2HgC{{l}_{2}}+SnC{{l}_{2}}\to H{{g}_{2}}C{{l}_{2}}+SnC{{l}_{4}}\]
A)
\[HgC{{l}_{2}}\] done
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B)
\[SnC{{l}_{2}}\] done
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C)
\[SnC{{l}_{4}}\] done
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D)
\[Hg\] done
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question_answer35)
Which of the following chemical equations best describes the formation of rust?
A)
\[4Fe+3{{O}_{2}}+x{{H}_{2}}O\to 2F{{e}_{2}}{{O}_{3}}.x{{H}_{2}}O\] done
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B)
\[Fe+{{H}_{2}}S{{O}_{4}}\to FeS{{O}_{4}}+{{H}_{2}}\] done
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C)
\[2F{{e}_{3}}{{O}_{4}}+{{H}_{2}}O\to 3F{{e}_{2}}{{O}_{3}}+{{H}_{2}}\] done
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D)
\[2FeS{{O}_{4}}\to F{{e}_{2}}{{O}_{3}}+S{{O}_{2}}+S{{O}_{3}}\] done
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question_answer36)
The given reaction belongs to which kind of chemical reaction? \[\underset{Spdoium\,sulphate}{\mathop{N{{a}_{2}}S{{O}_{4}}(aq)}}\,+BaC{{l}_{2}}\xrightarrow{{}}\underset{Barium\,sulphate}{\mathop{BaS{{O}_{4}}(s)}}\,+2NaCl(aq)\]
A)
Combination reaction done
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B)
Decomposition reaction done
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C)
Displacement reaction done
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D)
Double displacement reaction done
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question_answer37)
Which of the following statements is correct of the given reaction? \[10HN{{O}_{3}}+{{I}_{2}}\to 2HI{{O}_{3}}+10N{{O}_{2}}+4{{H}_{2}}O\]
A)
\[{{I}_{2}}\] is an oxidant. done
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B)
\[{{I}_{2}}\] is reduced. done
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C)
\[HN{{O}_{3}}\] is oxidized. done
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D)
\[HN{{O}_{3}}\] is reduced. done
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question_answer38)
Which gas is used in flush bags of chips to prevent oxidation?
A)
Helium done
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B)
Neon done
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C)
Nitrogen done
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D)
Argon done
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question_answer39)
Which of the given reactions is a compound - compound combination reaction?
A)
Reaction of water with calcium oxide. done
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B)
Reaction of iodine with white phosphorus. done
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C)
Reaction of iron with sulphur. done
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D)
Electrolysis of water. done
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question_answer40)
In the balanced equation given below, 'a' and 'b' stand for: \[aFe+b{{H}_{2}}O\to F{{e}_{2}}{{O}_{4}}+{{H}_{2}}\]
A)
\[a=3,\,\,b=4\] done
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B)
\[a=4,\,b=3\] done
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C)
\[a=2,\,b=5\] done
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D)
\[a=3,\,\,b=5\] done
clear
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