Fill in the blanks using the correct word given in brackets: (a) All circles are ................... (congruent, similar) (b) All squares are ................... (similar, congruent) (c) All ....................... triangles are similar (isosceles, equilaterals):

Fill in the blanks using the correct word given in bracket: (i) All circles are______(congruent, similar) (ii) All squares are_____. (similar, congruent) (iii) All______triangles are similar, (isosceles, equilateral) (iv) Two polygons of the same number of sides are similar, if (a) their- corresponding angles are___and (b) their- corresponding sides are__(equal, proportional)

Fill in the blanks by using the correct word/term given in the brackets. The pH of an acid is _____ than 7. (greater/less)

Fill in the blanks by using the correct word/term given in the brackets. The pH of a neutral solution is _____ at 298 K. (zero/7)

Fill in the blanks by using the correct word/term given in the brackets. The acid present in vinegar is _______ . (HCl//CH_(3)COOH)

Fill in the blanks by using the correct word/term given in the brackets. An acid produces _____ ions in aqueous solution. (hydrogen/hydroxide)

Fill in the blanks by using the correct word/term given in the brackets. An acid _____ change the colour of phenolphthalein. (must/does not)

Fill in the blanks by using the correct word/term given in the brackets. The blue colour of litmus solution is changed to red by ______ (acid/base)

Fill in the blanks by using the correct word/term given in the brackets. The pH of 10^(-6) is ____ than that of 10^(-4) HCl. (greater/less)

Fill in the blanks by selecting correct word/term given in the brackets. Brass is an alloy of copper and __________ (zinc/tin)

Fill in the blanks using the correct word given in brackets: Two triangles are similar, if their corresponding angles are ...... (proportional, equal) Two triangles are similar, if their corresponding sides are ....... (proportional, equal) (iii) Two polygons of the same number of sides are similar, if (a) their corresponding angles are and (b) their corresponding sides are ........ (equal, proportional).