Give the ratio in which hydrogen and oxygen are present in water by volume.
Anonymous Quiz
23%
1:2
6%
1:1
45%
2:1
27%
1:8
One of the following processes does not involve a chemical reaction, that is:
Anonymous Quiz
53%
Melting of candle wax when heated
16%
Burning of candle wax when heated
10%
Digestion of food in your stomach
21%
Ripening of banana
The chemical formula of magnesium oxide is ______.
Anonymous Quiz
23%
MgO2
7%
Mg2O
62%
MgO
8%
Mg(OH)2
Which of the following reactions is used in black-and-white photography?
Anonymous Quiz
17%
Combination Reaction
57%
Decomposition Reaction
15%
Displacement reaction
11%
Oxidation reaction
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From the following, which one is an example of a chemical reaction?
Anonymous Quiz
8%
Grapes get fermented
13%
Breakdown of food
15%
Formation of curd
64%
All of the above
What happens when lead nitrate reacts with potassium iodide?
Anonymous Quiz
10%
They will not react
16%
A large amount of hydrogen will be released
67%
Yellow ppt of lead iodide and potassium nitrate will be produced
7%
Evolution of gas will occur
Which of the following shows an oxidation reaction?
Anonymous Quiz
74%
Gain of oxygen
16%
Loss of oxygen
8%
Gain of hydrogen
3%
None of the above
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Which Acid is present in Tomato?
Anonymous Quiz
25%
Citric Acid
62%
Oxalic Acid
10%
Lactic Acid
2%
HCl
Which of the following is a strong acid?
Anonymous Quiz
67%
HCl pH 1
17%
CH3COOH pH 5
12%
Lemon juice pH 2.2
3%
Pure Milk pH 6
Na2CO3.10H2O is known as –
Anonymous Quiz
23%
Baking soda
15%
Baking powder
49%
Washing soda
13%
Bleaching powder
pH value less than 7 indicates that the solution is –
Anonymous Quiz
65%
Acidic
16%
Basic
17%
Neutral
2%
No effect
Which of the following is neutral salt?
Anonymous Quiz
43%
NH4Cl
22%
CH3COONa
25%
Na2CO3
10%
CH3COONH4
Farmers neutralise the effect of Acidity on the soil by adding –
Anonymous Quiz
47%
Slaked lime
21%
Gypsum
19%
Caustic soda
14%
Baking soda
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