Magnesium burns in air to give

July 20, 2023 – by mnsoomro 0

1. MgO
2. MgCO₃
3. Mg₃N²
4. Both A. and C

Submitted by :- Muhammad Nawaz

Beryllium shows diagonal relationship with

July 20, 2023 – by mnsoomro 0

1. Mg
2. Na
3. Al
4. B

Submitted by :- Muhammad Nawaz

Which of the mentioned elements has the highest melting point?

July 20, 2023 – by mnsoomro 0

1. Magnesium
2. Calcium
3. Strontium
4. Beryllium

Submitted by :- Muhammad Nawaz

Baking powder has one of the following constituent

July 20, 2023 – by mnsoomro 0

1. NaOH
2. NaHCO₃
3. KOH
4. Na₂CO₃

Submitted by :- Muhammad Nawaz

Lithium shows diagonal relationship with which one?

July 20, 2023 – by mnsoomro 0

1. Beryllium
2. Sodium
3. Magnesium
4. Calcium

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The most reactive alkali metal among the following is

July 20, 2023 – by mnsoomro 0

Li
Na
Rb
Cs

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Sodium reacts more vigorously than lithium because

July 20, 2023 – by mnsoomro 0

It is a metal
It has higher atomic mass
It is more electronegative
It is more electropositive

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Potassium crystallizes in a body centered lattice. Hence, the coordination number of potassium in potassium metal is

July 20, 2023 – by mnsoomro 0

1. 6
2. 8
3. 4
4. 12

Submitted by :- Muhammad Nawaz

Formula of gypsum is

July 20, 2023 – by mnsoomro 0

1. CaSO₄
2. CaSO₄.2H₂O
3. 2CaSO₄.H2O
4. CaSiO₃

Submitted by :- Muhammad Nawaz

Which is the colour imparted by lithium to the flame?

July 20, 2023 – by mnsoomro 0

1. Golden yellow
2. Grassy green
3. Violet
4. Red.

Submitted by :- Muhammad Nawaz

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