1.	Which one of the following will turn red litmus blue ?
	Lemon juice
	Soft drinks
	Baking soda solution
	Vinegar
	Answer: Baking soda solution Explanation:
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2.	Which of the following is acidic in nature ?
	Baking soda
	Lime juice
	Antacid
	Human blood
	Answer: Lime juice Explanation: Lime juice is acidic in nature. It has high amount of citric acid present in it.
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3.	An aqueous solution with pH = 1 is ?
	weakly acidic
	neutral
	strongly acidic
	strongly basic
	Answer: strongly acidic Explanation:
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4.	What is the pH range of our body ?
	7.2 – 8.4
	7.0 – 8.4
	7.2 – 8.0
	7.0 – 7.8
	Answer: 7.0 – 7.8 Explanation:
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5.	What is formed when zinc reacts with sodium hydroxide ?
	Sodium zincate and water
	Sodium zinc-oxide and hydrogen gas
	Sodium zincate and hydrogen gas
	Zinc hydroxide and sodium
	Answer: Sodium zincate and hydrogen gas Explanation: Zn + 2NaOH -> Ma2Zn02 (Sodium Zincate) + H2
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6.	Which of the following is not a mineral acid ?
	Nitric acid
	Sulphuric acid
	Citric acid
	Hydrochloride acid
	Answer: Citric acid Explanation: Citric acid is not a mineral acid. It is an organic acid or edible acid that is derived from organic compounds. Note: Mineral acids or inorganic acids are generally prepared from inorganic compounds such as minerals present in the earth’s crust. For examples, HCl (hydrochloride acid), H2SO4 (sulphuric acid) and HNO3 (nitric acid) are mineral acids. These acids dissolve in water to produce H+ ions.
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7.	Ammonium sulphate salt is ?
	Neutral salt
	Basic salt
	Complex salt
	Acidic salt
	Answer: Basic salt Explanation:
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8.	Chemical formula of baking soda is ?
	MgCO3
	MgSO4
	Na2CO3
	NaHCO3
	Answer: NaHCO3 Explanation:
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9.	Which of the following statements is correct about an aqueous solution of an acid and a base ?
	Higher the pH, weaker the acid, and Lower the pH, weaker the base.
	Higher the pH, stronger the acid, and Lower the pH, weaker the base.
	Higher the pH, stronger the acid, and Lower the pH, stronger the base.
	Higher the pH, weaker the acid, and Lower the pH, stronger the base.
	Answer: Higher the pH, weaker the acid, and Lower the pH, weaker the base. Explanation: When the pH of an aqueous solution is higher, acidic properties are weak. Thus it is a base. When the pH an aqueous solution is lower, basic properties are weak. Thus it is an acid. Note: In 1909 Sorenson devised a scale (known as pH scale) on which the strength of acid solutions as well as basic solutions could be represented by making use of the hydrogen ion concentrations in them. A pH scale is used to measure the acidic and basic strength of an aqueous solution. This scale is marked from 0 to 14. A solution is neutral if its pH value is 7. An acidic solution has a pH less than 7. This means an acidic solution has more concentration of H+ ions. A basic solution has a pH more than 7. This means a basic solution has more concentration of OH– ions.
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10.	Which of the following is not a acidic salt ?
	NH4Cl
	FeCl3
	CuSO4
	CH3COONa
	Answer: CH3COONa Explanation:
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