Question

which will make the water hard cacl2, MgCl, Nacl​

Answer 1

$<marquee>$

⭐MgCl (magnesium chloride) and CaCl2.⭐

Answer 2

$\huge\boxed{Answer:}$

Water becomes hard in the presence of Mg or Ca

so,in the given option water will be harden by,

• MgCl
• CaCl2

$<marquee scrolldelay="85" scrollamount="6"> Thank-you☺</marquee>$