MCQ
NaHCO, formed by reaction of:
  • A
    NaOH + H2CO3
  • B
    NaCl + H2CO3
  • C
    Na2CO+ HCl
  • D
    NaOH + Na2CO3

Answer

  1. NaOH + H2CO3

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Similar questions

A student takes about 2 mL ethanoic acid in a dry test tube and adds a pinch of sodium hydrogen carbonate to it. He reports the following observations:

  1. Immediately a colourless and odourless gas evolves with a brisk effervescence.
  2. The gas turns lime water milky when passed through it.
  3. The gas burns with an explosion when a burning splinter is brought near it.
  4. The gas extinguishes the burning splinter that is brought near it.

The correct observations are:

Carbon -12 atom has:
Element X reacts with element Y to form a compound Z. During the formation of compound Z, atoms of X lose one electron each whereas atoms of Y gain one electron each. Which of the following property is not shown by compound Z?
What type of oxide would Eka-aluminium form?
  1. EO3
  2. E3O2
  3. E2O3
  4. EO
The following reaction is an example of a:
4NH3(g) + 5O2 (g) → 4NO(g) + 6H2O(g)
  1. Displacement reaction.
  2. Combination reaction.
  3. Redox reaction.
  4. Neutralisation reaction.
  1. 1 and 4
  2. 2 and 3
  3. 1 and 3
  4. 3 and 4
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. $\text{Zn + FeSO}_4\rightarrow\text{ZnSO}_4+\text{Fe}$

An alloy is:
The heteroatoms present in $\text{CH}_3-\text{CH}_2-\text{O}-\text{CH}_2-\text{CH}_2\text{Cl}$ are:
  1. Oxygen.
  2. Carbon.
  3. Hydrogen.
  4. Chlorine.
  1. 1 and 2
  2. 2 and 3
  3. 3 and 4
  4. 1 and 4
The number of carbon atoms present in the molecule of fifth member of the homologous series of alkynes is:
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.