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71
In universal indicators, what does a pH value of 4 to 5 indicate?
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Answer: Option A
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72
What is the chemical name of saltpetre?
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Answer: Option A
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73
The hypo soIution used in photography is an aqueous solution of
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Answer: Option A
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74
Which of the following options is different from the other options?
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Answer: Option B
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75
Table saIt (NaCl) is a pro duct of
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Answer: Option B
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76
Read the statement and decide which conclusions are correct.
Statement:
Sulphuric acid is acidic in nature.
Conclusion:
1. The pH value of sulphuric acid is 7.5.
2. Sulphuric acid contains some phosphorus.
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Answer: Option B
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77
Which one of the following was the first mineral acid discovered?
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Answer: Option A
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78
Which of the following solutions will not change the colour of blue litmus paper to red?
1. Acid solution
2. Base solution
3. Common salt solution
Select the correct answer:
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Answer: Option B
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79
What is untrue for bleaching powder?
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Answer: Option A
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80
Which one among the following is not a property of salt?
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Answer: Option B
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