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Class 10 - Chemistry Set 4
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1. When quick lime is added to water, formation
of slaked lime takes place. This is an example
of
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1 point
composition reaction
endothermic reaction
exothermic reaction
decomposition reaction
2. When Mendeleev made the periodic table the number of elements discovered till then were
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1 point
65
52
63
73
3. Which of the following element is not found in free state in nature?
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1 point
Ag
Cu
Na
Au
4. The IUPAC name of neopentane is :<br>
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1 point
2,2-Dimethylpropane
2-Methylpropane
2,2-Dimethylbutane
2-Methylbutane
5. The IUPAC name of acetylene is
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1 point
Ethane
Ethene
Ethylene
Ethyne
6. Identify the unsaturated compounds from the following<br>(i) Propane<br>(ii) Propene<br>(iii) Propyne<br>(iv) Cyclopropane
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1 point
(i) and (ii)
(ii) and (iv)
(iii) and (iv)
(ii) and (iii)
7. Choose the correct option :<br>
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1 point
salt
acid
carbonate
rust
8. Which one of the following properties is not generally exhibited by ionic compounds ?
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1 point
Solubility in water
Electrical conductivity in solid state
High melting and boiling points
Electrical conductivity in molten state
9. Tooth decay in mouth is caused due to a fall in
pH level of the mouth below 5.5 due to the
formation of
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1 point
Formic acid
Acetic acid
Lactic acid
None of these
10. Ritika wants to make cake. She mixed eggs, flour, sugar and baking powder and then baked it to make a cake. This is a ____.
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1 point
Physical change
Chemical change
Neither physical nor chemical
Reversible change
11. Number of elements that were known at the time of Mendeleev
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1 point
63
73
83
55
12. Which of the following is formed at Cathode?
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1 point
NaOH
Cl2
H2
None of these
13. Where do we find pure copper deposits in the process of electrolytic refining?
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1 point
Anode
Cathode
Electrolyte
Both (1) & (3)
14. Choose the correct option :
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1 point
Physical
Biological
Chemical
Radiological
15. What will be the change in colour of blue litmus paper when a few drops of solution obtained on dissolving gases from burning sulphur is poured on it?
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Blue to red
Red to blue
Blue to red then from red to green
No change
16. When quick lime is added to water, which of the following does not happen?
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A chemical reaction occurs
Hissing sound is produced
O2 gas is evolved
Heat is evolved
17. Choose the correct option<br>
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1 point
salt
oxide
water
base
18. Choose the correct option
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1 point
H+, OH-
OH-, H+
H+, H+
OH-, OH-
19. Covalent solid which has very high MP and BP is
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1 point
diamond
graphite
ammonia
both (1) and (2)
20. Choose the correct option<br>
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1 point
salt
oxide
water
base
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