Chemistry · Science General

Common Chemical Compounds and Reactions

1,197 Questions

Common chemical compounds and reactions questions test your knowledge of everyday chemicals, their formulas, and their interactions. Topics include properties of acids and bases, hard water chemistry, and compounds like baking soda and plaster of paris. This section is essential for general science preparation.

Acids and basesPlaster of parisHard water chemistryCommon chemical formulasEveryday chemical reactions

Common Chemical Compounds and Reactions Questions

Multiple choice oxoacids of halogens p- block elements-ii p-block elements the p-block elements chemistry

When slaked lime is treated with chlorine, a compound is formed. Which of the following is correct about that compound? 

  1. It is used in bleaching cotton.

  2. It is used as disinfectant.

  3. It is a halide.

  4. It is used for sterilization of water.
Reveal answer Fill a bubble to check yourself
A,B,D Correct answer
Explanation

Calcium hydroxide react with chlorine to give calcium hipochlorite, calcium chloride and water. Calcium hipochlorite which is formed in the reaction is used as bleaching agent, disinfevtant and in the sterilization process.

$2Ca(OH) _2 + 2Cl2 \rightarrow Ca(ClO) _2 + CaCl _2 + 2H _2O$.

Hence option A,B,C are correct.

Multiple choice group 17 elements - trends in chemical properties group 17 elements - properties p- block elements-ii p-block elements chemistry

Which of the following can be hydrolysed?

  1. $TeF _6$
  2. $NCl _3$
  3. $SF _6$
  4. Both $1$ & $2$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

$TeF _6$ canbe easily hydrolysed because of large size of Te central atom and low electronegativity the bond polarity of this bond is more .so, it is more reactive than other compounds like $SF _6$

$TeF _6+6H _2O\longrightarrow H _6TeO _6+6HF$

Multiple choice group 17 elements - trends in chemical properties group 17 elements - properties p- block elements-ii p-block elements chemistry

Which two of the following salts are used for preparing iodized salt?
$(i)   KIO _3$
$(ii)  KI$
$(iii)  I _2$
$(iv)  HI$

  1. $(i)$ and $(ii)$
  2. $(i)$ and $(iii)$
  3. $(ii)$ and $(iv)$
  4. $(iii)$ and $(iv)$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Iodised salt is table salt mixed with a small amount of various salts of the element iodine.
$KIO _3$ and $KI$ are used for preparing iodised salt.
Potassium iodate and potassium iodine is used in the iodized salt to prevent the iodine deficiency.

Multiple choice group 17 elements - trends in chemical properties group 17 elements - properties p- block elements-ii p-block elements chemistry

Which of the following compounds is used as a sedative (sleep-inducing substance)?

  1. Sodium Chloride

  2. Potassium bromide

  3. Calcium Chloride

  4. Phosphorous trichloride
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Potassium bromide ($KBr$) is a salt, widely used as an anticonvulsant and a sedative in the late 19th and early 20th centuries.

Its action is due to the bromide ion (sodium bromide is equally effective).
Hence option B is correct answer.

Multiple choice group 17 elements - trends in chemical properties group 17 elements - properties p- block elements-ii p-block elements chemistry

When hypohalites are heated at $300K$, the product obtained are:

  1. halide

  2. halogen

  3. perhalate

  4. halate
Reveal answer Fill a bubble to check yourself
A,D Correct answer
Explanation

Hypohalites $(XO^-)$ disproportionates in aqueous solution on heating to produce halide ion and halate ion.


$\underset {(Hypohalite)}{3XO^-}\overset {300K}{\rightleftharpoons}\underset {(Halide)}{{2X}^-}+\underset {(Halate)}{{XO _3}^-}$

Multiple choice biology soil : our life soil properties soil - properties basics of soil pollution

The principal cation in alkaline soil is 

  1. Na$^+$
  2. K$^+$
  3. Ca$^{2+}$

  4. Any of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • Alkaline soils are clay soils with high pH, a poor soil structure and a low infiltration capacity.pH of alkaline soil is  > 8.5, 
  • The principal cation in alkaline soil is Ca2+ because alkaline soils are primarily caused by a calcium carbonate-rich parent material weathering (developing) in an arid or dry environment.
  • Hence the principal cation in alkaline soil is  Ca2+.
  • So, the correct answer is 'Ca2+'.
Multiple choice geography in the land of kerala introduction to metallurgy occurrence of metals study of kerala

Which of the following compounds are not called Thomas slag?

  1. Calcium silicate

  2. Calcium phosphate

  3. Barium phosphate

  4. Strontium silicate
Reveal answer Fill a bubble to check yourself
A,C,D Correct answer
Explanation
Calcium phosphate($Ca _3(PO _4) _2O)$ is called Thomas slag and remaining calcium silicate, barium phosphate and strontium silicate are not Thomas slag.

Hence options A,C & D are correct.
Multiple choice geography in the land of kerala introduction to metallurgy occurrence of metals study of kerala

${Ca _3(PO _4) _2}$ is :-

  1. Thomas slag

  2. Used in cement manufacturing

  3. Used in manufacturing of phosphorus fertilizer

  4. Used as a refactory material
Reveal answer Fill a bubble to check yourself
A,B,C Correct answer
Explanation

${Ca _3(PO _4) _2}$ is called as Thomas slag and is used in cement manufacturing and manufacturing of phosphorus fertilizer,so options A,B & C are correct stetements.
Options A,B & C  are correct.

Multiple choice zoology soil pollution industrial chemicals and their harmful effects toxic wastes and their effects soil pollution-causes

Which of the following is dissolved in water to make a Bordeaux mixture?

  1. Calcium chloride

  2. Copper sulphate

  3. Sodium chloride

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Bordeaux mixture is a combination of copper sulphate and hydrated lime. It is used mainly to control garden, vineyard and farm infestations of fungus.

Thus, the correct answer is option B.

Multiple choice biology soldiers of defense blood clotting and healing of wounds coagulation of blood blood clotting

Sodium oxalate prevents blood clotting due to

  1. Blocking of fibrinogen transformation

  2. Covering RBC

  3. Inhibiting activity of clotting factor of plasma

  4. Combining with calcium ions of blood
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sodium oxalate, like citrates, can be used to remove calcium ions (Ca${^2}$${^+}$) from blood plasma. It thus prevents blood from clotting. In the presence of calcium ions and other clotting factors, factor X activates an enzyme called prothrombin activator. This enzyme then converts the plasma protein prothrombin into thrombin. Thrombin is an enzyme that, in turn, converts fibrinogen to fibrin.

Multiple choice chemistry principles of metallurgy concentration of ore concentration of ores general principles of metallurgy

Which of the following compound is used as froth stabliser?

  1. Fatty acid

  2. Aniline

  3. Xanthates

  4. Phosphoric acid
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Here answer is option B

Aniline stabilize the froth before it is taken out for further treatment.
In this process, a suspension of a powdered ore is made with water. In this process, a suspension of a powdered ore is made with water. Collectors like pine oil, fatty acids and xanthates are added to it. Froth stabilizer like cresols, aniline stabilize the forth