Xth sci quiz 1 eSmart Classes
Engaging Science Quiz
Test your knowledge of basic chemistry and scientific reactions with our engaging quiz! Perfect for students and science enthusiasts, this quiz will challenge your understanding of chemical reactions, properties of gases, and the behavior of common substances.
Get ready to explore:
- Chemical reactions and their observations
- Properties of gases evolved in reactions
- Understanding of pH and litmus indicators
Dilute hydrochloric acid is added to granulated zinc taken in a test tube. The following observations are recorded. Point out the correct observation.
Bubbles of colourless and odourless hydrogen gas is evolved.
The surface of metal becomes shining
The reaction mixture turns milky
Odour of a pungent smelling gas is recorded
On immersing an iron nail in CuSO4 solution for few minutes, you will observe that
No reaction takes place
The colour of solution fades away
The surface of iron nails acquire a black coating
The colour of solution changes to green
The colour of the precipitate formed when barium chloride solution is mixed with sodium sulphate solution is
Blue
Black
White
Green
What happens when ferrous sulphate crystals are heated?
A gas having the smell of burning sulphur is evolved
No gas is evolved
Brown coloured gas is evolved
Colourless and odourless gas is evolved
Which of the following will be required to identify the gas evolved when dilute hydrochloric acid reacts with zinc metal?
Red litmus paper
PH paper
Lime water
A burning splinter
When a magnesium ribbon is burnt in air, the ash formed is
Black
White
Yellow
Pink
Carbon forms four covalent bonds by sharing its four valence electrons with four univalent atoms, e.g. hydrogen. After the formation of four bonds, carbon attains the electronic configuration of
Helium
Neon
Argon
Krypton
How the colour changes when the gases after thermal decomposition of ferrous sulphate come in contact with an acidified solution of potassium dichromate?
Green to orange
Red to colorless
Orange to green
Blue to green
A solution turns red litmus blue, its pH is likely to be
1
4
5
10
Which one of the following types of medicines is used for treating indigestion?
Antibiotic
Analgesic
Antacid
Antiseptic
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