Class 10 Chemistry Acid,Base,Salt and Analytical

metal oxides are generally

• acidic in nature

• basic in nature

• neutral

• some may be acidic some may be basic

HCl is aciidic in

• in gaseous state

• in benzene solution

• in aqueous solution

• in any of these

in aqueous solution, H+ ions exist as

• H₃0⁺

• H₉O₄⁺

• Neither of these

• either H₃0⁺ or H₉O₄⁺

which of the acids are called king of chemicals

• H Cl

• H₂so₄

• HNo₃

• vinegar(acetic acid)

Litmus solution is purple colured dye extracted from__________ plant

phenophthalein has __________ colur in basic solution.

• red

• pink

• yellow

• green

What property do all three of these common household substances have in common?

• they are all basic
• they taste sour
• they have a pH below 7
• they all turn litmus paper red

If you have a solution that is very acidic with a pH of 3.5, what can you do to raise the pH? 

• add more acid
• add more water
• increase the temperature
• add a base

Which of the following word pairs correctly completes the sentence below?
_______ are corrosive substances characterized as having a strong smell, a sour taste, and a _______.

• Acids; pH less than 7
• Acids; pH greater than 7
• Bases; pH greater than 7
• Bases; pH less than 7

If an acid is combined with a base of equal strength, the result will most likely be

• a neutral solution.
• a stronger acid.
• impossible to tell without testing the pH.
• a stronger base