10th Class Chemistry MCQS Water Online Test 4

temporary-hardness-is-because-of-3-a_-_ca-28-hco-3-csub-3-e-3-3-c-2-fsub-3-e-29-3-csub-3-e-2-3-c-2-fsub-3-e,temporary-hardness-is-removed-by-adding-3-a_-_slaked-lime,the-density-of-water-at-4-c-2-b-0-c-is-3-a_-_1-gcm-3-csup-3-e-3-3-c-2-fsup-3-e,the-disease-that-causes-bones-and-teeth-damage-3-a_-_fluorosis,the-gas-which-is-used-to-kill-the-harmful-bacteria-present-in-water-3-a_-_chlorine,the-salt-which-cause-permanent-hardness-is-3-a_-_ca-cl-3-csub-3-e-2-3-c-2-fsub-3-e,vibrios-cholera-bacteria-causes-the-disease-3-b_-_cholera,water-shows-maximum-density-at-3-a_-_4-c-2-b-0-c,we-use-water-in-daily-life-3-a_-_soft-water,when-na-hco-3-csub-3-e-3-3-c-2-fsub-3-e-is-heated-then-it-become-3-b_-_na-3-csub-3-e-2-3-c-2-fsub-3-ec-0,which-compounds-protect-teeth-from-diseases-3-f_-_fluorine,which-disease-causes-diarrhea-3-f_-_cholera,which-one-of-the-following-salts-makes-the-water-permanently-hard-3-f_-_ca-so-3-csub-3-e-4-3-c-2-fsub-3-e