Uses of Group 2 Elements

The most abundant metal ion present in the human body is

Which of the following metal is present in Chlorophyll?

What percent of magnesium is found in chlorophyll of plants?

An adult body contains about how many grams of calcium?

The slaked lime is prepared by adding water to-

Correct order of density is -

A doctor by mistake administers a dilute $\mathrm{Ba}{\left({\mathrm{NO}}_3\right)}_2$ solution to a patient for radiographic investigations. Which of the following should be the best to prevent the absorption of soluble barium and subsequent barium poisoning?

Directions: Each of these questions contains an Assertion followed by reason. Read them carefully and answer the question on the basis of following options. You have to select the one that best describes the two statements.

Assertion: The main pigment for the absorption of light in the plants is chlorophyll which contains magnesium.

Reason : Divalent magnesium ions perform important biological functions such as maintainance of ion balance and nerve impulse conduction.

Assertion: Barium is not required for normal biological function in human.
Reason: Barium does not show variable oxidation state.

Cotyledons are also called-

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

Element used in $X$ -ray tube is:

Which of the following statements is false?

The salts of which alkaline earth metal are used in the form of manure?

Mixture of  MgCl₂ and MgO  is called

Which of the following statements is false ?