The s-Block Elements Test 41

Result

The s-Block Elements Test 41

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Weekly Quiz Competition

Question 1
1 / -0

The alkaline earth metal ion present in chlorophyll is

A
$$Ca$$

B
$$Mg$$

C
$$Be$$

D
$$Ba$$
Question 2
1 / -0

Among the alkaline earth metals, the element forming predominantly covalent compounds is

A
Be

B
Ba

C
Ca

D
Mg
Question 3
1 / -0

Diagonal relationship is found in between

A
$$Be-Al$$

B
$$B-C$$

C
$$Li-Mg$$

D
$$A\ and\ C\ both$$
Question 4
1 / -0

The ionization energy of a hydrogen atom is 13.6eV. The energy of the third-lowest electronic level in doubly ionized lithium (Z=3) is:

A
-28.7eV

B
-54.4eV

C
-122.4eV

D
-13.6eV

Solution
Question 5
1 / -0

Which of the following are arranged in increasing order of solubilities?

A
$$CaCO_3 < KHCO_3 < NaHCO_3$$

B
$$NaHCO_3 < KHCO_3 < CaCO_3$$

C
$$KHCO_3 < NaHCO_3 < CaCO_3$$

D
$$CaCO_3 < NaHCO_3 < KHCO_3$$
Question 6
1 / -0

Incorrect statement is:

A
$$NaHCO_{3}$$ and $$KHCO_{3}$$ have same crystal structure

B
On heating $$LiNO_{3}$$ decomposes into $$LiO_{2}$$ and $$NO_{2}$$

C
Among alkali metals, $$Li$$ metal impart red colour to flame

D
$$Li_{2}SO_{4}$$ does not from alum

Solution
Question 7
1 / -0

Which of the following carbonate is not stable to heat.

A
$$Li_2CO_3$$

B
$$Na_2CO_3$$

C
$$K_2CO_3$$

D
$$Rb_2CO_3$$

Solution
Question 8
1 / -0

Which element is most alkaline :

A
F

B
CI

C
Br

D
I

Solution
Question 9
1 / -0

Which of the following is a binary compound?

A
$${ K }_{ 2 }C{ O }_{ 3 }$$

B
$$HCl{ O }_{ 4 }$$

C
$${ H }_{ 2 }O$$

D
$${ H }_{ 2 }S{ O }_{ 4 }$$

Solution
Question 10
1 / -0

Which of the following statement is false?

A
$$Mg^{2+}$$ ion forms a complex with $$ATP$$

B
$$Ca^{2+}$$ ions are important in blood clotting.

C
$$Ca^{2+}$$ ions are not important in maintaining the regular beating of the hear

D
$$Mg^{2+}$$ ions are important in the green parts of plants

Solution