A colourless salt among the following that gives violet colour to Bunsen flame is -

1. Na2CO3

2. K2CO3

3. Cu(OH)2

4. MgCO3

Subtopic:  Physical Properties |
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A compound soluble in pyridine is:-

1. LiCl

2. CsCl

3. NaCl

4. KCl

Subtopic:  Physical Properties |
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 Superoxide is formed on heating with an excess of air by:-

1. Li, Na

2. Mg, Be

3. Na, K

4. K, Rb

Subtopic:  Physical Properties | Chemical Properties |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology

The incorrect statement among the following is-

1. Lithium is the strongest reducing agent.

2. Density of potassium is more than sodium.

3. Cs are used in devising photoelectric cells.

4. All alkali metals give a blue solution in liquid ammonia.

Subtopic:  Physical Properties |
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An ion that has the largest size among the following is :

1. Li+(aq)

2. Cs+(aq)

3. Li+(g) 

4. K+(aq)

Subtopic:  Chemical Properties |
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The suspension of slaked lime in water is known as -

1. Limewater.

2. Quicklime.

3. Milk of lime.

4. Aqueous solution of slaked lime.

Subtopic:  Compounds of Ca and Na -Preparations, Properties & Uses |
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The incorrect statement among the following regarding Beryllium is-

1. It is rendered passive by nitric acid.

2. lt forms Be2C

3. It's salts rarely hydrolyze.

4. It's hydride is electron-deficient and polymeric.

Subtopic:  Compounds of Ca and Na -Preparations, Properties & Uses |
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An alkaline earth metal sulphate that has hydration enthalpy higher than the lattice enthalpy is -

1. CaSO4               

2. BeSO4

3. BaSO4               

4. SrSO4

Subtopic:  Chemical Properties | Compounds of Ca and Na -Preparations, Properties & Uses |
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Property of the alkaline earth metals that increases with their atomic number is -

1. Solubility of their hydroxides in water.

2. Solubility of their sulphates in water.

3. Ionisation energy.

4. Electronegativity.

Subtopic:  Physical Properties |
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The strongest factor responsible for reducing action of Li metal in an aqueous solution is :

1. Sublimation enthalpy .         

2. Ionisation enthalpy.

3. Hydration enthalpy .             

4. Electron-gain enthalpy.

Subtopic:  Physical Properties |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology