Tag: group 2

Questions Related to group 2

Which salt can be used to identify coloured cation?

limestone uses of group 2 compounds group 2 industrial inorganic chemistry chemistry

  1. Borax

  2. Microcosmic salt

  3. Both (a) and (b)

  4. None of these

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Correct Option: C
Explanation:

Borax and Microcosmic are generally used to identify coloured cations.

$Ca^{2+}$ can stop:


limestone uses of group 2 compounds group 2 industrial inorganic chemistry chemistry

  1. Bleeding

  2. infection

  3. bone growth

  4. all

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Correct Option: A
Explanation:

Bleeding can be stopped by using $Ca^{2+}$ salt. Bleeding is due to the deficincy of calcium in blood, Sufficient calcium should b provided by the diet.

Following compounds are used in fire-works :

limestone uses of group 2 compounds group 2 industrial inorganic chemistry chemistry

  1. $LiNO _{3}$

  2. $BaCl _{2}$

  3. $(NH _{4}) _{2}Cr _{2}O _{7}$

  4. all of these

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Correct Option: D
Explanation:

All compounds are used in fire works.
$LiNO _{3}$ on ignition imparts crimson red,
                        $BaCl _{2} \rightarrow $ green
           $(NH _{4}) _{2}Cr _{2}O _{7}\rightarrow$ green.

The hydration energy of ${Mg}^{+2}$ is larger than that of ?

limestone uses of group 2 compounds group 2 industrial inorganic chemistry chemistry

  1. ${Al}^{+3}$

  2. ${Na}^{+1}$

  3. ${Be}^{+2}$

  4. ${Mg}^{+3}$

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Correct Option: B
Explanation:

Hydration energy depends on charge of ion and ionic radius. Higher the charge, greater the hydration energy. On the other hand, smaller the size, greater the hydration energy. Charge is considered first for comparison. Hence, $Mg^{2+}$ has higher hydration energy than $Na^+$.

Metal used in flash photography is:

limestone uses of group 2 compounds group 2 industrial inorganic chemistry chemistry

  1. Mg

  2. Al

  3. Both Mg & Al

  4. Neither Mg nor Al

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Correct Option: C
Explanation:

Magnesium($Mg$) and aluminum($Al$) metals are used in flash photography.

The compound formed when an alkyl halide reacts with magnesium in ether is:

limestone uses of group 2 compounds group 2 industrial inorganic chemistry chemistry

  1. Grignard reagent

  2. Antiseptic

  3. Anaesthetic

  4. Antipyretic

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Correct Option: A
Explanation:

Alkyl halide reacts with magnesium in ether solvent to form alkyl magnesium halide which is a Grignard reagent.
$RX+Mg \xrightarrow {ether} RMgX$

State True or False.
Caphosol a supersaturated calcium phosphate solution is used in the prevention and treatment of oral mucositis caused by chemotherapy or radiotherapy.

limestone uses of group 2 compounds group 2 industrial inorganic chemistry chemistry

  1. True

  2. False

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Correct Option: A
Explanation:

A supersaturated calcium phosphate solution such as Caphosol may be used in the prevention and treatment of oral mucosits caused by chemotherapy or radiotherapy.

Which is used to treat acid indigestion?

limestone uses of group 2 compounds group 2 industrial inorganic chemistry chemistry

  1. $Be(OH) _2$

  2. $KOH$

  3. $Mg(OH) _2$

  4. $Ca(OH) _2$

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Correct Option: C
Explanation:

Milk of magnesia is an aqueous suspension of magnesium hydroxide $[Mg(OH) _2]$ used to treat acid indigestion.

Which of the following metals on treatment with alkali will liberate $H _2$ gas?

limestone uses of group 2 compounds group 2 industrial inorganic chemistry chemistry

  1. Be

  2. Sn

  3. Ga

  4. In

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Correct Option: A,B,C
Explanation:

As Be, Sn and Ga are amphoteric metals so these metals on treatment with alkali will liberate $H _2$ gas.

The substance used as pigment in paint is :

limestone uses of group 2 compounds group 2 industrial inorganic chemistry chemistry

  1. borax

  2. alumina

  3. lithophone

  4. none of these

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Correct Option: C
Explanation:

Lithophone (mixture of $ZnS, BaSO _4$) is used as pigment in paint.