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1
JEE Main 2022 (Online) 29th July Morning Shift
MCQ (Single Correct Answer)
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-1
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Lithium nitrate and sodium nitrate, when heated separately, respectively, give :

A
$$\mathrm{LiNO}_{2}$$ and $$\mathrm{NaNO}_{2}$$
B
$$\mathrm{Li}_{2} \mathrm{O}$$ and $$\mathrm{Na}_{2} \mathrm{O}$$
C
$$\mathrm{Li}_{2} \mathrm{O}$$ and $$\mathrm{NaNO}_{2}$$
D
$$\mathrm{LiNO}_{2}$$ and $$\mathrm{Na}_{2} \mathrm{O}$$
2
JEE Main 2022 (Online) 28th July Evening Shift
MCQ (Single Correct Answer)
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-1
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The correct decreasing order for metallic character is :

A
Na > Mg > Be > Si > P
B
P > Si > Be > Mg > Na
C
Si > P > Be > Na > Mg
D
Be > Na > Mg > Si > P
3
JEE Main 2022 (Online) 28th July Evening Shift
MCQ (Single Correct Answer)
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Out of Syllabus
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Statement I : An alloy of lithium and magnesium is used to make aircraft plates.

Statement II : The magnesium ions are important for cell-membrane integrity.

In the light the above statements, choose the correct answer from the options given below :

A
Both Statement I and Statement II are true
B
Both Statement I and Statement II are false
C
Statement I is true but Statement II is false
D
Statement I is false but Statement II is true
4
JEE Main 2022 (Online) 28th July Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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Which of the following statement is incorrect?

A
Low solubility of LiF in water is due to its small hydration enthalpy.
B
$$\mathrm{KO}_{2}$$ is paramagnetic.
C
Solution of sodium in liquid ammonia is conducting in nature.
D
Sodium metal has higher density than potassium metal.
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