MCQ
compound → element + element
  • A
    Synthesis
  • B
    Decomposition
  • C
    Combustion
  • D
    Single replacement

Answer

  1. Decomposition

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

A covalent molecule having a double bond between its atoms is:
  1. Hydrogen.
  2. Oxygen.
  3. Water.
  4. Ammonia.
Calcium oxide reacts vigorously with water to produce slaked lime.

CaO(s) + H2O(l) → Ca(OH)2(aq).

This reaction can be classified as:

  1. Combination reaction.
  2. Exothermic reaction.
  3. Endothermic reaction.
  4. Oxidation reaction.

Which of the following is a correct option?

Which component is getting reduced in the following reaction: MnO2 + 4HCl → MnCl2 + 2H2O + Cl2
The indicator which produces a pink colour in an alkaline solution is:
  1. Methyl orange.
  2. Turmeric paper.
  3. Phenolphthalein.
  4. Litmus paper.
One of the following molecular formulae represents a ketone. This formula is:
The first member of alkyne homologous series is:
  1. Ethyne.
  2. Ethene.
  3. Propyne.
  4. Methane.
Match the chemical substances given in Column (A) with their appropriate application given in Column (B):
  Column (A)   Column (B)
A. Bleaching powder 1. Preparation of glass
B. Baking soda 2. Production of H2 and Cl2
C. Washing soda 3. Decolourisation
D. Sodium chloride 4. Antacid
  1. A—2, B—1, C—4, D—3
  2. A—3, B—2, C—4, D—1
  3. A—3, B—4, C—1, D—2
  4. A—2, B—4, C—1, D—3
Which of the following are combination reactions?

  1. $2\text{KCIO}_3\xrightarrow{\text{Heat}}2\text{KCI}+3\text{O}_2$

  2. $\text{MgO}+\text{H}_2\text{O}\rightarrow\text{Mg(OH)}_2$

  3. $4\text{AI + 3O}_2\rightarrow\ 2\text{AI}_2\text{O}_3$

  4. $\text{Zn + FeSO}_4\rightarrow\text{ZnSO}_4+\text{Fe}$

  1. Both 1 and 3
  2. Both 3 and 4
  3. Both 2 and 4
  4. Both 2 and 3
Which of the following statements is not a correct statements about the trends when going from left to right across the periods of the periodic table?
  1. The elements become less metallic in nature.
  2. The number of valence electrons increases.
  3. The atoms lose their electrons more easily.
  4. The oxides become more acidic.
Which of the following are combination reactions?

  1. $2\text{KCIO}_3\xrightarrow{\text{Heat}}2\text{KCI}+3\text{O}_2$

  2. $\text{MgO}+\text{H}_2\text{O}\rightarrow\text{Mg(OH)}_2$

  3. $4\text{AI + 3O}_2\rightarrow\ 2\text{AI}_2\text{O}_3$

  4. $\text{Zn + FeSO}_4\rightarrow\text{ZnSO}_4+\text{Fe}$