Class 7 Acids Bases And Salts CBSE Questions & Answers

Class 7 · Acids Bases And Salts

This is Science Class 7 Acids Bases and Salts CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Substance which are bitter in taste, feel soapy on touching are
  • A
    Salts
  • B
    Acids
  • C
    Bases
    Correct
  • D
    Neutral
2
Special type of substance used to test whether acidic or basic are called
  • A
    Indicators
    Correct
  • B
    Pigments
  • C
    Tester
  • D
    Salts
3
Litmus used as indicator is obtained from
  • A
    China rose
  • B
    Lichens
    Correct
  • C
    Beet root
  • D
    Turmeric
4
Acetic acid is found in
  • A
    Milk
  • B
    Citrus fruits
  • C
    Vinegar
    Correct
  • D
    Curd
5
Which of the following colour is given by phenolphthalein in basic salt?
  • A
    Orange
  • B
    Blue
  • C
    Red
  • D
    Pink
    Correct
6
Orange juice contain
  • A
    Tartaric acid
  • B
    Hydrochloric acid
  • C
    Lactic acid
  • D
    Citric acid
    Correct
7
Acids are ---------- in taste.
  • A
    Salty
  • B
    Sour
    Correct
  • C
    Bitter
  • D
    Sweet
8
Which of the following medicine is used for indigestion?
  • A
    Antipyretic
  • B
    Antiseptic
  • C
    Antacids
    Correct
  • D
    Analgesic
9
Organic matter is added to soil to neutralise the excess of base in soil as organic matter
  • A
    Absorbs the base from the soil
  • B
    Release acid on decomposition
    Correct
  • C
    Release salt on decomposition
  • D
    Absorbs the acid from the soil
10
Which of the following is not a mineral acid?
  • A
    Nitric acid
  • B
    Carbonic acid
    Correct
  • C
    Hydrochloric acid
  • D
    Sulphuric acid
11
When acid reacts with metals hydrogen gas is released which
  • A
    Buns with pop sound
    Correct
  • B
    Extinguish the flame
  • C
    Turn lime water milky
  • D
    Turn lime water brown
12
Acid solution are good conductor of electricity due to
  • A
    Absence of water
  • B
    Presence of metal
  • C
    Formation of salt
  • D
    Formation of ions
    Correct
13
Hydrogen gas is evolved when
  • A
    Acids reacts with salts
  • B
    Acids reacts with bases
  • C
    Acids reacts with metals
    Correct
  • D
    Acids reacts with non-metals
14
A dilute acid contains
  • A
    More acid than water
  • B
    Both in equal proportion
  • C
    No water only acid
  • D
    More water than acid
    Correct
15
In neutralisation reaction
  • A
    Heat is always evolve
    Correct
  • B
    Change in colour takes place
  • C
    Change in odour occurs
  • D
    Heat is always absorbs