s-Block Elements

The following metal ion activates many enzymes, participates in the oxidation of glucose to produce ATP and with Na+, is responsible for the transmission of nerve signals.

1. Copper
2. Calcium
3. Potassium
4. Iron

HCl was passed through a solution of CaCl2, MgCl2 and NaCl. Which of the following compound(s) crystallize(s)?

1. Only NaCl
2. Only MgCl2
3. NaCl, MgCl2 and CaCl2
4. Both MgCl2 and CaCl2

Which of the following is an amphoteric hydroxide?

1. Mg(OH)2
2. Be(OH)2
3. Sr(OH)2
4. Ca(OH)2

Enzymes that utilize ATP in phosphate transfer require an alkaline earth metal (M) as the cofactor. M is

1. Ca
2. Sr
3. Be
4. Mg

Which of the following oxides is most acidic in nature?

1. MgO
2. BeO
3. BaO
4. CaO

Magnesium reacts with an element (X) to form an ionic compound. If the ground state electronic configuration of (X) is 1s2 2s2 2p3, the simplest formula for this compound is

1. Mg2X3
2. MgX2
3. Mg2X
4. Mg3X2

Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under an electric field?

1. K+
2. Rb+
3. Li+
4. Na+

Which of the following statements is false?

1. Ca2+ ions are not important in maintaining the regular beating of the heart.
2. Mg2+ ions are important in the green parts of the plants.
3. Mg2+ ions form a complex with ATP.
4. Ca2+ ions are important in blood clotting.

The product obtained as a result of a reaction of nitrogen with CaC2 is

1. CaCN2
2. Ca2CN
3. Ca(CN)2
4. CaCN

The suspension of slaked lime in water is known as

1. lime water
2. quick lime
3. milk of lime
4. aqueous solution of slaked lime.