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Question Detail
Brass is an alloy of ?
- Copper and Tin
- Copper and Zinc
- Copper and Aluminium
- Iron and Copper
Answer: Option B
1. What is a mixture of potassium nitrate powdered charcoal and sulphur called?
- paint
- aluminium
- brass
- gun powder
Answer: Option D
Explanation:
gun powder is the mixture of potassium nitrate powdered charcoal and sulphur.
2. Elements that show the properties of both metals and non metals are called ?
- metalloids
- allotropes
- alloys
- colloids
Answer: Option A
3. pH of blood is ?
- 10.4
- 9
- 7.4
- 4
Answer: Option C
4. The major component used in preparation of different types of glasses is :
- Sodium borate
- Sodium silicate
- Silica
- Calcium silicate
Answer: Option C
5. The most abundant rare gas in the atmosphere is ?
- He
- Ne
- Ar
- Xe
Answer: Option C
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