Physical properties of alkaline earth metals - class-X

Question 1 Multiple Choice (Single Answer)

Radium is a harmful element which emits radiation.

True
False

Question 2 Multiple Choice (Single Answer)

Select the correct statement out of the following.

calcium fluoride is soluble in water.
barium sulfate is soluble in water.
barium dioxide is soluble in water.
magnesium sulfate is soluble in water.

Question 3 Multiple Choice (Single Answer)

The sulphate of which metal given below has the highest solubility in water?

$Ca$
$Ba$
$Sr$
$Mg$

Question 4 Multiple Choice (Single Answer)

Which of the following metals cannot give flame
tests?

Be
Na
K
Ca

Question 5 Multiple Choice (Single Answer)

Which of the following salt gives a crimson red colour in flame test?

$BaCl _{2}$
$CaCl _{2}$
$BeCl _{2}$
$SrCl _{2}$

Question 6 Multiple Choice (Single Answer)

Passivity is exhibited by: $A) Be , B) Mg, C) Al ,D) B$

$A, B$
$B, C$
$A, C$
$B, D$

Question 7 Multiple Choice (Single Answer)

Sulphate of an alkaline earth metal which crystalizes without water of hydration is?

$Be^{2+}$
$Mg^{2+}$
$Ca^{2+}$
$Sr^{2+}$

Question 8 Multiple Choice (Single Answer)

Assertion(A) : Beryllium and magnesium do not impart characteristic colour in flame.
Reasoning(R) : Both Beryllium and magnesium have high I.E.

Both Assertion and Reason are true and Reason is the correct explanation of Assertion
Both Assertion and Reason are true but Reason is not a correct explanation of Assertion
Assertion is true but Reason is false
Both Assertion and Reason are false

Question 9 Multiple Choice (Multiple Answers)

Alkaline earth metal(s) which does (do) not
impart colour to the flame is (are):

Be
Mg
Ca
Sr

Question 10 Multiple Choice (Single Answer)

Which of the following shows least melting point?

$Be$
$Mg$
$Ca$
$Sr$

Question 11 Multiple Choice (Multiple Answers)

In which case first has lower melting point than second?

Mg, Be
Be, Ca
Cs, Li
K, Li

Question 12 Multiple Choice (Multiple Answers)

In which case second has lower boiling point than first?

Li, K
Be, Mg
Li, Cs
Ca, Mg

Question 13 Multiple Choice (Single Answer)

The correct sequence of increasing melting point of $BeCl _{2},MgCl _{2},CaCl _{2},SrCl _{2}$ and $BaCl _{2}$ is

$BaCl _{2} < SrCl _{2} < CaCl _{2} < MgCl _{2} < BeCl _{2}$
$BeCl _{2} < MgCl _{2} < CaCl _{2} < SrCl _{2} < BaCl _{2}$
$BeCl _{2} < CaCl _{2} < MgCl _{2} < SrCl _{2} < BaCl _{2}$
$MgCl _{2} < BeCl _{2} < SrCl _{2} < CaCl _{2} < BaCl _{2}$

Question 14 Multiple Choice (Single Answer)

Which of the alkaline earth elements forms covalent bonds ?

Ca
Mg
Sr
Be

Question 15 Multiple Choice (Single Answer)

Estimation of calcium and magnesium is done by :

EDTA.
oxalate.
phosphate.
None of these.

Question 16 Multiple Choice (Single Answer)

Lightest alkaline earth metal is :

Be
Mg
Ca
Sr

Question 17 Multiple Choice (Single Answer)

Flame test is not given by :

Ca
Ba
Be
Li

Question 18 Multiple Choice (Single Answer)

The first ionization energies of alkaline earth metals are higher than those of the alkali metals. This is because:

there is increase in the nuclear charge of the alkaline earth metal
there is decrease in the nuclear charge of the alkaline earth metal
there is no change in the nuclear charge
none ofthe above

Question 19 Multiple Choice (Single Answer)

Alkaline earth metal salt are :

paramagnetic
diamagnetic
ferromagnetic
all of these

Question 20 Multiple Choice (Multiple Answers)

Select the correct statement(s) about barium :

It shows photoelectric effect.
It is silvery white metal.
It forms $Ba(N _3) _2$ which is used in preparation of green fire.
Its ionization energy is less than radium.

Question 21 Multiple Choice (Single Answer)

The most lightest alkaline earth metal is:

$Be$
$Mg$
$Ca$
$Ba$

Question 22 Multiple Choice (Single Answer)

Which of the following has highest melting point?

Magnesium
Barium
Calcium
Beryllium

Question 23 Multiple Choice (Single Answer)

Select the incorrect choice:

the solubility of alkaline earth metal's carbonates, sulphates and chromates decreases Be to Be.
the solubility of alkaline earth metal's hydroxides is less than alkali metal hydroxides.
solubility of alkaline earth metal's oxides increases from Be to Ba.
$SO _2$ on passing in lime water turns is milky.

Question 24 Multiple Choice (Single Answer)

Dehydration of hydrates of halides of calcium, barium and strontium i.e., $CaCl _2.6H _2O,BaCl _2.2H _2O,SrCl _2.2H _2O$ can be achieved by heating. These become wet on keeping in the air. Which of the following statements is correct about these halides?

The act as dehydrating agents.
They can absorb moisture from air.
They have tendency to from hydrate which decreases from calcium to barium.
All of the above

Question 25 Multiple Choice (Single Answer)

Which of the following metal sulphide is water soluble?

$CaS$
$ZnS$
$HgS$
$CdS$

Question 26 Multiple Choice (Multiple Answers)

Which of the following does/do not impact characteristic colour to the flame?

$MgSO _4$
$CaCl _2$
$Sr(NO _3) _2$
$BeCl _2$

Question 27 Multiple Choice (Single Answer)

The correct increasing order of basic nature among Be, Mg, Ca and Sr is :

$Be < Ca < Mg < Sr$
$Be < Mg < Sr < Ca$
$Be < Mg < Ca < Sr$
$Ca < Sr < Be < Mg$

Question 28 Multiple Choice (Multiple Answers)

Select the correct statements :

Solubility of alkali earth metal's oxide decreases down the group
Solubility of alkaline earth metal's sulphide increases down the group
Solubility of alkali metal's hydroxide increases down the group
Solubility of alkali metal's fluorides increases down the group

Physical properties of alkaline earth metals - class-X

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