State of the following formula of a compound is incorrect. Incorrectly write the correct formula. KCr2O7

State of the following formula of a compound is incorrect. Incorrectly write the correct formula.

KCr₂O₇

One Line Answer

KCr₂O₇

Correct formula – K₂Cr₂O₇

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Chapter 1: The Language of Chemistry - For Additional High Order Thinking Questions [Page 18]

Chapter 1 The Language of Chemistry
For Additional High Order Thinking Questions | Q 3. 2. C. | Page 18

What is meant by the term chemical formula?

(a) Write the symbols/formulae of two simple ions and two compound ions (or polyatomic ions).

Define ‘formula unit’ of an ionic compound. What is the formula unit of (i) sodium chloride, and
(ii) magnesium chloride ?

Give the formula and valency of:
chromate ………….…….. .

Complete the following statement by selecting the correct option :

The correct formula of aluminium oxide is

Identify the following substance:

Gas C that is colourless and can be used as a bleaching agent.

Match the following:

Column A	Column B
(a) Pb(NO₃)₂	(i) rotten eggs smell
(b) CO₂	(ii) burns with a pop sound
(c) (NH₄)₂Cr₂O₇	(iii) the suffocating smell of sulphur
(d) HCI	(iv) lime water turns milky
(e) NO₂	(v) crackling sound
(f) O₂	(vi) residue swells up
(g) H₂	(vii) brown gas
(i) H₂S	(viii) supports combustion
(j) SO₂	(ix) fumes with NH₃ solution

Name the element in the compound and give the formula of the following compound:

Acetic acid