Tag: uses of alkali and alkaline earth metals

Question 1

Multiple choice chemistry the s-block elements (alkali and alkaline earth metals) uses of alkali and alkaline earth metals uses of s block elements group 1 elements: alkali metals

$MCrO _{4(s)}\overset{CH _{3}COOH(aq)}{\rightarrow}MCrO _{4}$ ( Suspension) above change is correct for which metal ion (s) ?

$Ba^{2+},Sr^{2+},Ca^{2+}$
$Ba^{2+},Sr^{2+}$
$Sr^{2+},Ca^{2+}$

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Answer

Only $Ba^{2+}$

Question 2

Multiple choice chemistry the s-block elements (alkali and alkaline earth metals) uses of alkali and alkaline earth metals uses of s block elements group 1 elements: alkali metals

Which is the major constituent of gun powder?

Nitre
Sulphur
Charocal
Chile salt petre

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Answer

$KHC _{4}H _{4}O _{6}$

Answer

$K\cdot Al(SO _4) _2\cdot 12 H _2O$

Answer

decomposes to give oxygen

Answer

absorbs $CO _2$

Answer

Thiocarbonate

Answer

cyclohexane

Answer

diispropyl ether

Question 3

Multiple choice chemistry the s-block elements (alkali and alkaline earth metals) uses of alkali and alkaline earth metals uses of s block elements group 1 elements: alkali metals

The common name, "cream of tartar" refers to :

$K(SbO)C _{4}H _{4}O _{6}$
$KNaC _{4}H _{4}O _{6}$
$Mg _{2} (OH) _{2}(C _{4}H _{4}O _{6})H _{2}O$

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Question 4

Multiple choice chemistry the s-block elements (alkali and alkaline earth metals) uses of alkali and alkaline earth metals uses of s block elements group 1 elements: alkali metals

$Sr^{2+}$ forms a very unstable complex with $NO _{3-}$. A solution that was $0.001 M - Sr(ClO _{4}) _{2}$ and $0.05 M - KNO _{3}$ was found to have only $75$% of its strontium in the uncomplexed $Sr^{2+}$ form, the balance being $Sr(NO _{3})^{+}$. What is $K _{f}$ for complexation?

$6.67$
$0.15$
$60$
$26.67$

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Question 5

Multiple choice chemistry the s-block elements (alkali and alkaline earth metals) uses of alkali and alkaline earth metals uses of s block elements group 1 elements: alkali metals

Potash alum is represented by the formula :

$K _2SO _4\cdot Al _2(SO _4) _3\cdot 24H _2O$
Both (a) and (b)
None of these

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Question 6

Multiple choice chemistry the s-block elements (alkali and alkaline earth metals) uses of alkali and alkaline earth metals uses of s block elements group 1 elements: alkali metals

$KO _2$ (potassium superoxide) is used in oxygen cylinders in space and submarines because, it :

eliminates moisture
produces ozone

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Question 7

Multiple choice chemistry the s-block elements (alkali and alkaline earth metals) uses of alkali and alkaline earth metals uses of s block elements group 1 elements: alkali metals

In the reaction : $K _4[Fe(CN) _6] + K _2CO _3\rightarrow $ the product formed is :

$FeCO _3$
$KCN$
$KFeCO _3$
$K _3 [Fe(CN) _6]$

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Question 8

Multiple choice chemistry the s-block elements (alkali and alkaline earth metals) uses of alkali and alkaline earth metals uses of s block elements group 1 elements: alkali metals

${K} _{2}C{S} _{3}$ can be called potassium :

Sulphocyanide
Thiocarbide
Thiocyanate

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Question 9

Multiple choice chemistry the s-block elements (alkali and alkaline earth metals) uses of alkali and alkaline earth metals uses of s block elements group 1 elements: alkali metals

The material used in photoelectric cells contains:

$Cs$
$Si$
$Sn$
$Ti$

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Question 10

Multiple choice chemistry the s-block elements (alkali and alkaline earth metals) uses of alkali and alkaline earth metals uses of s block elements group 1 elements: alkali metals

Metallic sodium is used as a drying agent for :

chloroform
diethylamine

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