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Test: General Characteristics of Alkali Metals - JEE MCQ


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15 Questions MCQ Test Chemistry for JEE Main & Advanced - Test: General Characteristics of Alkali Metals

Test: General Characteristics of Alkali Metals for JEE 2024 is part of Chemistry for JEE Main & Advanced preparation. The Test: General Characteristics of Alkali Metals questions and answers have been prepared according to the JEE exam syllabus.The Test: General Characteristics of Alkali Metals MCQs are made for JEE 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: General Characteristics of Alkali Metals below.
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Test: General Characteristics of Alkali Metals - Question 1

Which is incorrect statement?

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Test: General Characteristics of Alkali Metals - Question 2

Sodium carbonate solution in water is alkaline due to

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Due to anionic hydrolysis

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Test: General Characteristics of Alkali Metals - Question 3

When a crystal of caustic soda is exposed to air, a liquid layer is deposited because :

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It is hygroscopic and deliquescent. It absorbs moisture and to form

Test: General Characteristics of Alkali Metals - Question 4

The pair of compounds which cannot exits together in solution is

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is an acidic salt)

Test: General Characteristics of Alkali Metals - Question 5

and may be distinguished by treating their aqueous solution with :

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Basic magnesium carbonate

Test: General Characteristics of Alkali Metals - Question 6

When sulphur is heated with (aq). The compounds formed are

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Test: General Characteristics of Alkali Metals - Question 7

Acidified solution of sodium thiosulphate is unstable because in thiosulphate

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(Disproportionation)

Test: General Characteristics of Alkali Metals - Question 8

For which one of the following minerals, the composition given is incorrect?

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Barax is .

Test: General Characteristics of Alkali Metals - Question 9

If is added to an aqueous solution of ions, a white precipitate appears and on adding excess , the precipitate dissolves. In this solution zinc exists in the :

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Test: General Characteristics of Alkali Metals - Question 10

Which of the following does not form an oxide on heating?

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does not decompose to form .

Test: General Characteristics of Alkali Metals - Question 11

Which of the following statements regarding alkali metals is not correct?

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Potassium and caesium are used in the photoelectric cells.

Test: General Characteristics of Alkali Metals - Question 12

Which of the following sulphates has the highest solubility?

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is most soluble because hydration energy is more than lattice energy

Hydration energy decreases, hence solubility decreases

Test: General Characteristics of Alkali Metals - Question 13

Which of the following statements is not correct?

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Alkali metals form ionic hydrides.

Test: General Characteristics of Alkali Metals - Question 14

Which of the following orders regarding the melting point of alkali chlorides is true?

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Lattice energy is defined as the amount of energy required to separate one mole of solid ionic compound into its gaseous ions. Evidently greater the lattice energy, higher is the melting point of the alkali metals halide and lower is its solubility in water.
For the same halide ion, the melting point of lithium halides are lower than those of the corresponding sodium halides and thereafter they decrease as we move down the group from Na to Cs.
The low melting point of as compared to is probably because is covalent in nature and is ionic.

Test: General Characteristics of Alkali Metals - Question 15

Brine is

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Brine is concentrated solution of .

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