UP Board Class 10 Chemistry — practice questions
14 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice UP Board Class 10 Chemistry in the app →Why are potato chips often packed in nitrogen-filled packets?Which equation best represents the essential ionic change in a neutralization reaction?A white insoluble solid forms when aqueous sodium chloride reacts with aqueous silver nitrate. This reaction iWhen iron is placed in blue copper sulphate solution, the solution turns green and reddish-brown copper is depHeating copper nitrate crystals produces black copper oxide, reddish-brown nitrogen dioxide, and oxygen. This Which process is correctly matched with its description?The reaction $\mathrm{NH_3(g) + HCl(g) \rightarrow NH_4Cl(s)}$ is classified as a combination reaction becauseWhich statement is true for a combination reaction?Which of the following is the correctly balanced equation for the reaction of potassium permanganate with hydrFor the equation
$$a\,\mathrm{KMnO_4}+b\,\mathrm{HCl}\rightarrow c\,\mathrm{KCl}+d\,\mathrm{MnCl_2}+e\,\mathrIn balancing chemical equations, why is it often useful to balance an element that appears in only one compounWhat is the main purpose of balancing a chemical equation?In the chemical formula $\mathrm{H_2SO_4}$, what does the formula directly indicate about one molecule of sulpWhich of the following is the best evidence that a change is chemical rather than merely physical?